2 * Copyright © 2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 #include "compiler/glsl/ir.h"
27 #include "nir_search_helpers.h"
28 #include "util/u_math.h"
29 #include "util/bitscan.h"
34 fs_visitor::emit_nir_code()
36 /* emit the arrays used for inputs and outputs - load/store intrinsics will
37 * be converted to reads/writes of these arrays
41 nir_emit_system_values();
43 nir_emit_impl(nir_shader_get_entrypoint((nir_shader
*)nir
));
47 fs_visitor::nir_setup_outputs()
49 if (stage
== MESA_SHADER_TESS_CTRL
|| stage
== MESA_SHADER_FRAGMENT
)
52 unsigned vec4s
[VARYING_SLOT_TESS_MAX
] = { 0, };
54 /* Calculate the size of output registers in a separate pass, before
55 * allocating them. With ARB_enhanced_layouts, multiple output variables
56 * may occupy the same slot, but have different type sizes.
58 nir_foreach_variable(var
, &nir
->outputs
) {
59 const int loc
= var
->data
.driver_location
;
60 const unsigned var_vec4s
=
61 var
->data
.compact
? DIV_ROUND_UP(glsl_get_length(var
->type
), 4)
62 : type_size_vec4(var
->type
, true);
63 vec4s
[loc
] = MAX2(vec4s
[loc
], var_vec4s
);
66 for (unsigned loc
= 0; loc
< ARRAY_SIZE(vec4s
);) {
67 if (vec4s
[loc
] == 0) {
72 unsigned reg_size
= vec4s
[loc
];
74 /* Check if there are any ranges that start within this range and extend
75 * past it. If so, include them in this allocation.
77 for (unsigned i
= 1; i
< reg_size
; i
++)
78 reg_size
= MAX2(vec4s
[i
+ loc
] + i
, reg_size
);
80 fs_reg reg
= bld
.vgrf(BRW_REGISTER_TYPE_F
, 4 * reg_size
);
81 for (unsigned i
= 0; i
< reg_size
; i
++)
82 outputs
[loc
+ i
] = offset(reg
, bld
, 4 * i
);
89 fs_visitor::nir_setup_uniforms()
91 /* Only the first compile gets to set up uniforms. */
92 if (push_constant_loc
) {
93 assert(pull_constant_loc
);
97 uniforms
= nir
->num_uniforms
/ 4;
99 if (stage
== MESA_SHADER_COMPUTE
) {
100 /* Add a uniform for the thread local id. It must be the last uniform
103 assert(uniforms
== prog_data
->nr_params
);
104 uint32_t *param
= brw_stage_prog_data_add_params(prog_data
, 1);
105 *param
= BRW_PARAM_BUILTIN_SUBGROUP_ID
;
106 subgroup_id
= fs_reg(UNIFORM
, uniforms
++, BRW_REGISTER_TYPE_UD
);
111 emit_system_values_block(nir_block
*block
, fs_visitor
*v
)
115 nir_foreach_instr(instr
, block
) {
116 if (instr
->type
!= nir_instr_type_intrinsic
)
119 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
120 switch (intrin
->intrinsic
) {
121 case nir_intrinsic_load_vertex_id
:
122 case nir_intrinsic_load_base_vertex
:
123 unreachable("should be lowered by nir_lower_system_values().");
125 case nir_intrinsic_load_vertex_id_zero_base
:
126 case nir_intrinsic_load_is_indexed_draw
:
127 case nir_intrinsic_load_first_vertex
:
128 case nir_intrinsic_load_instance_id
:
129 case nir_intrinsic_load_base_instance
:
130 case nir_intrinsic_load_draw_id
:
131 unreachable("should be lowered by brw_nir_lower_vs_inputs().");
133 case nir_intrinsic_load_invocation_id
:
134 if (v
->stage
== MESA_SHADER_TESS_CTRL
)
136 assert(v
->stage
== MESA_SHADER_GEOMETRY
);
137 reg
= &v
->nir_system_values
[SYSTEM_VALUE_INVOCATION_ID
];
138 if (reg
->file
== BAD_FILE
) {
139 const fs_builder abld
= v
->bld
.annotate("gl_InvocationID", NULL
);
140 fs_reg
g1(retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD
));
141 fs_reg iid
= abld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
142 abld
.SHR(iid
, g1
, brw_imm_ud(27u));
147 case nir_intrinsic_load_sample_pos
:
148 assert(v
->stage
== MESA_SHADER_FRAGMENT
);
149 reg
= &v
->nir_system_values
[SYSTEM_VALUE_SAMPLE_POS
];
150 if (reg
->file
== BAD_FILE
)
151 *reg
= *v
->emit_samplepos_setup();
154 case nir_intrinsic_load_sample_id
:
155 assert(v
->stage
== MESA_SHADER_FRAGMENT
);
156 reg
= &v
->nir_system_values
[SYSTEM_VALUE_SAMPLE_ID
];
157 if (reg
->file
== BAD_FILE
)
158 *reg
= *v
->emit_sampleid_setup();
161 case nir_intrinsic_load_sample_mask_in
:
162 assert(v
->stage
== MESA_SHADER_FRAGMENT
);
163 assert(v
->devinfo
->gen
>= 7);
164 reg
= &v
->nir_system_values
[SYSTEM_VALUE_SAMPLE_MASK_IN
];
165 if (reg
->file
== BAD_FILE
)
166 *reg
= *v
->emit_samplemaskin_setup();
169 case nir_intrinsic_load_work_group_id
:
170 assert(v
->stage
== MESA_SHADER_COMPUTE
);
171 reg
= &v
->nir_system_values
[SYSTEM_VALUE_WORK_GROUP_ID
];
172 if (reg
->file
== BAD_FILE
)
173 *reg
= *v
->emit_cs_work_group_id_setup();
176 case nir_intrinsic_load_helper_invocation
:
177 assert(v
->stage
== MESA_SHADER_FRAGMENT
);
178 reg
= &v
->nir_system_values
[SYSTEM_VALUE_HELPER_INVOCATION
];
179 if (reg
->file
== BAD_FILE
) {
180 const fs_builder abld
=
181 v
->bld
.annotate("gl_HelperInvocation", NULL
);
183 /* On Gen6+ (gl_HelperInvocation is only exposed on Gen7+) the
184 * pixel mask is in g1.7 of the thread payload.
186 * We move the per-channel pixel enable bit to the low bit of each
187 * channel by shifting the byte containing the pixel mask by the
188 * vector immediate 0x76543210UV.
190 * The region of <1,8,0> reads only 1 byte (the pixel masks for
191 * subspans 0 and 1) in SIMD8 and an additional byte (the pixel
192 * masks for 2 and 3) in SIMD16.
194 fs_reg shifted
= abld
.vgrf(BRW_REGISTER_TYPE_UW
, 1);
196 for (unsigned i
= 0; i
< DIV_ROUND_UP(v
->dispatch_width
, 16); i
++) {
197 const fs_builder hbld
= abld
.group(MIN2(16, v
->dispatch_width
), i
);
198 hbld
.SHR(offset(shifted
, hbld
, i
),
199 stride(retype(brw_vec1_grf(1 + i
, 7),
200 BRW_REGISTER_TYPE_UB
),
202 brw_imm_v(0x76543210));
205 /* A set bit in the pixel mask means the channel is enabled, but
206 * that is the opposite of gl_HelperInvocation so we need to invert
209 * The negate source-modifier bit of logical instructions on Gen8+
210 * performs 1's complement negation, so we can use that instead of
213 fs_reg inverted
= negate(shifted
);
214 if (v
->devinfo
->gen
< 8) {
215 inverted
= abld
.vgrf(BRW_REGISTER_TYPE_UW
);
216 abld
.NOT(inverted
, shifted
);
219 /* We then resolve the 0/1 result to 0/~0 boolean values by ANDing
220 * with 1 and negating.
222 fs_reg anded
= abld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
223 abld
.AND(anded
, inverted
, brw_imm_uw(1));
225 fs_reg dst
= abld
.vgrf(BRW_REGISTER_TYPE_D
, 1);
226 abld
.MOV(dst
, negate(retype(anded
, BRW_REGISTER_TYPE_D
)));
240 fs_visitor::nir_emit_system_values()
242 nir_system_values
= ralloc_array(mem_ctx
, fs_reg
, SYSTEM_VALUE_MAX
);
243 for (unsigned i
= 0; i
< SYSTEM_VALUE_MAX
; i
++) {
244 nir_system_values
[i
] = fs_reg();
247 /* Always emit SUBGROUP_INVOCATION. Dead code will clean it up if we
248 * never end up using it.
251 const fs_builder abld
= bld
.annotate("gl_SubgroupInvocation", NULL
);
252 fs_reg
®
= nir_system_values
[SYSTEM_VALUE_SUBGROUP_INVOCATION
];
253 reg
= abld
.vgrf(BRW_REGISTER_TYPE_UW
);
255 const fs_builder allbld8
= abld
.group(8, 0).exec_all();
256 allbld8
.MOV(reg
, brw_imm_v(0x76543210));
257 if (dispatch_width
> 8)
258 allbld8
.ADD(byte_offset(reg
, 16), reg
, brw_imm_uw(8u));
259 if (dispatch_width
> 16) {
260 const fs_builder allbld16
= abld
.group(16, 0).exec_all();
261 allbld16
.ADD(byte_offset(reg
, 32), reg
, brw_imm_uw(16u));
265 nir_function_impl
*impl
= nir_shader_get_entrypoint((nir_shader
*)nir
);
266 nir_foreach_block(block
, impl
)
267 emit_system_values_block(block
, this);
271 * Returns a type based on a reference_type (word, float, half-float) and a
274 * Reference BRW_REGISTER_TYPE are HF,F,DF,W,D,UW,UD.
276 * @FIXME: 64-bit return types are always DF on integer types to maintain
277 * compability with uses of DF previously to the introduction of int64
281 brw_reg_type_from_bit_size(const unsigned bit_size
,
282 const brw_reg_type reference_type
)
284 switch(reference_type
) {
285 case BRW_REGISTER_TYPE_HF
:
286 case BRW_REGISTER_TYPE_F
:
287 case BRW_REGISTER_TYPE_DF
:
290 return BRW_REGISTER_TYPE_HF
;
292 return BRW_REGISTER_TYPE_F
;
294 return BRW_REGISTER_TYPE_DF
;
296 unreachable("Invalid bit size");
298 case BRW_REGISTER_TYPE_B
:
299 case BRW_REGISTER_TYPE_W
:
300 case BRW_REGISTER_TYPE_D
:
301 case BRW_REGISTER_TYPE_Q
:
304 return BRW_REGISTER_TYPE_B
;
306 return BRW_REGISTER_TYPE_W
;
308 return BRW_REGISTER_TYPE_D
;
310 return BRW_REGISTER_TYPE_Q
;
312 unreachable("Invalid bit size");
314 case BRW_REGISTER_TYPE_UB
:
315 case BRW_REGISTER_TYPE_UW
:
316 case BRW_REGISTER_TYPE_UD
:
317 case BRW_REGISTER_TYPE_UQ
:
320 return BRW_REGISTER_TYPE_UB
;
322 return BRW_REGISTER_TYPE_UW
;
324 return BRW_REGISTER_TYPE_UD
;
326 return BRW_REGISTER_TYPE_UQ
;
328 unreachable("Invalid bit size");
331 unreachable("Unknown type");
336 fs_visitor::nir_emit_impl(nir_function_impl
*impl
)
338 nir_locals
= ralloc_array(mem_ctx
, fs_reg
, impl
->reg_alloc
);
339 for (unsigned i
= 0; i
< impl
->reg_alloc
; i
++) {
340 nir_locals
[i
] = fs_reg();
343 foreach_list_typed(nir_register
, reg
, node
, &impl
->registers
) {
344 unsigned array_elems
=
345 reg
->num_array_elems
== 0 ? 1 : reg
->num_array_elems
;
346 unsigned size
= array_elems
* reg
->num_components
;
347 const brw_reg_type reg_type
= reg
->bit_size
== 8 ? BRW_REGISTER_TYPE_B
:
348 brw_reg_type_from_bit_size(reg
->bit_size
, BRW_REGISTER_TYPE_F
);
349 nir_locals
[reg
->index
] = bld
.vgrf(reg_type
, size
);
352 nir_ssa_values
= reralloc(mem_ctx
, nir_ssa_values
, fs_reg
,
355 nir_emit_cf_list(&impl
->body
);
359 fs_visitor::nir_emit_cf_list(exec_list
*list
)
361 exec_list_validate(list
);
362 foreach_list_typed(nir_cf_node
, node
, node
, list
) {
363 switch (node
->type
) {
365 nir_emit_if(nir_cf_node_as_if(node
));
368 case nir_cf_node_loop
:
369 nir_emit_loop(nir_cf_node_as_loop(node
));
372 case nir_cf_node_block
:
373 nir_emit_block(nir_cf_node_as_block(node
));
377 unreachable("Invalid CFG node block");
383 fs_visitor::nir_emit_if(nir_if
*if_stmt
)
388 /* If the condition has the form !other_condition, use other_condition as
389 * the source, but invert the predicate on the if instruction.
391 nir_alu_instr
*cond
= nir_src_as_alu_instr(if_stmt
->condition
);
392 if (cond
!= NULL
&& cond
->op
== nir_op_inot
) {
393 assert(!cond
->src
[0].negate
);
394 assert(!cond
->src
[0].abs
);
397 cond_reg
= get_nir_src(cond
->src
[0].src
);
400 cond_reg
= get_nir_src(if_stmt
->condition
);
403 /* first, put the condition into f0 */
404 fs_inst
*inst
= bld
.MOV(bld
.null_reg_d(),
405 retype(cond_reg
, BRW_REGISTER_TYPE_D
));
406 inst
->conditional_mod
= BRW_CONDITIONAL_NZ
;
408 bld
.IF(BRW_PREDICATE_NORMAL
)->predicate_inverse
= invert
;
410 nir_emit_cf_list(&if_stmt
->then_list
);
412 if (!nir_cf_list_is_empty_block(&if_stmt
->else_list
)) {
413 bld
.emit(BRW_OPCODE_ELSE
);
414 nir_emit_cf_list(&if_stmt
->else_list
);
417 bld
.emit(BRW_OPCODE_ENDIF
);
419 if (devinfo
->gen
< 7)
420 limit_dispatch_width(16, "Non-uniform control flow unsupported "
425 fs_visitor::nir_emit_loop(nir_loop
*loop
)
427 bld
.emit(BRW_OPCODE_DO
);
429 nir_emit_cf_list(&loop
->body
);
431 bld
.emit(BRW_OPCODE_WHILE
);
433 if (devinfo
->gen
< 7)
434 limit_dispatch_width(16, "Non-uniform control flow unsupported "
439 fs_visitor::nir_emit_block(nir_block
*block
)
441 nir_foreach_instr(instr
, block
) {
442 nir_emit_instr(instr
);
447 fs_visitor::nir_emit_instr(nir_instr
*instr
)
449 const fs_builder abld
= bld
.annotate(NULL
, instr
);
451 switch (instr
->type
) {
452 case nir_instr_type_alu
:
453 nir_emit_alu(abld
, nir_instr_as_alu(instr
));
456 case nir_instr_type_deref
:
457 unreachable("All derefs should've been lowered");
460 case nir_instr_type_intrinsic
:
462 case MESA_SHADER_VERTEX
:
463 nir_emit_vs_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
465 case MESA_SHADER_TESS_CTRL
:
466 nir_emit_tcs_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
468 case MESA_SHADER_TESS_EVAL
:
469 nir_emit_tes_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
471 case MESA_SHADER_GEOMETRY
:
472 nir_emit_gs_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
474 case MESA_SHADER_FRAGMENT
:
475 nir_emit_fs_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
477 case MESA_SHADER_COMPUTE
:
478 nir_emit_cs_intrinsic(abld
, nir_instr_as_intrinsic(instr
));
481 unreachable("unsupported shader stage");
485 case nir_instr_type_tex
:
486 nir_emit_texture(abld
, nir_instr_as_tex(instr
));
489 case nir_instr_type_load_const
:
490 nir_emit_load_const(abld
, nir_instr_as_load_const(instr
));
493 case nir_instr_type_ssa_undef
:
494 /* We create a new VGRF for undefs on every use (by handling
495 * them in get_nir_src()), rather than for each definition.
496 * This helps register coalescing eliminate MOVs from undef.
500 case nir_instr_type_jump
:
501 nir_emit_jump(abld
, nir_instr_as_jump(instr
));
505 unreachable("unknown instruction type");
510 * Recognizes a parent instruction of nir_op_extract_* and changes the type to
514 fs_visitor::optimize_extract_to_float(nir_alu_instr
*instr
,
515 const fs_reg
&result
)
517 if (!instr
->src
[0].src
.is_ssa
||
518 !instr
->src
[0].src
.ssa
->parent_instr
)
521 if (instr
->src
[0].src
.ssa
->parent_instr
->type
!= nir_instr_type_alu
)
524 nir_alu_instr
*src0
=
525 nir_instr_as_alu(instr
->src
[0].src
.ssa
->parent_instr
);
527 if (src0
->op
!= nir_op_extract_u8
&& src0
->op
!= nir_op_extract_u16
&&
528 src0
->op
!= nir_op_extract_i8
&& src0
->op
!= nir_op_extract_i16
)
531 /* If either opcode has source modifiers, bail.
533 * TODO: We can potentially handle source modifiers if both of the opcodes
534 * we're combining are signed integers.
536 if (instr
->src
[0].abs
|| instr
->src
[0].negate
||
537 src0
->src
[0].abs
|| src0
->src
[0].negate
)
540 unsigned element
= nir_src_as_uint(src0
->src
[1].src
);
542 /* Element type to extract.*/
543 const brw_reg_type type
= brw_int_type(
544 src0
->op
== nir_op_extract_u16
|| src0
->op
== nir_op_extract_i16
? 2 : 1,
545 src0
->op
== nir_op_extract_i16
|| src0
->op
== nir_op_extract_i8
);
547 fs_reg op0
= get_nir_src(src0
->src
[0].src
);
548 op0
.type
= brw_type_for_nir_type(devinfo
,
549 (nir_alu_type
)(nir_op_infos
[src0
->op
].input_types
[0] |
550 nir_src_bit_size(src0
->src
[0].src
)));
551 op0
= offset(op0
, bld
, src0
->src
[0].swizzle
[0]);
553 set_saturate(instr
->dest
.saturate
,
554 bld
.MOV(result
, subscript(op0
, type
, element
)));
559 fs_visitor::optimize_frontfacing_ternary(nir_alu_instr
*instr
,
560 const fs_reg
&result
)
562 nir_intrinsic_instr
*src0
= nir_src_as_intrinsic(instr
->src
[0].src
);
563 if (src0
== NULL
|| src0
->intrinsic
!= nir_intrinsic_load_front_face
)
566 if (!nir_src_is_const(instr
->src
[1].src
) ||
567 !nir_src_is_const(instr
->src
[2].src
))
570 const float value1
= nir_src_as_float(instr
->src
[1].src
);
571 const float value2
= nir_src_as_float(instr
->src
[2].src
);
572 if (fabsf(value1
) != 1.0f
|| fabsf(value2
) != 1.0f
)
575 /* nir_opt_algebraic should have gotten rid of bcsel(b, a, a) */
576 assert(value1
== -value2
);
578 fs_reg tmp
= vgrf(glsl_type::int_type
);
580 if (devinfo
->gen
>= 6) {
581 /* Bit 15 of g0.0 is 0 if the polygon is front facing. */
582 fs_reg g0
= fs_reg(retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_W
));
584 /* For (gl_FrontFacing ? 1.0 : -1.0), emit:
586 * or(8) tmp.1<2>W g0.0<0,1,0>W 0x00003f80W
587 * and(8) dst<1>D tmp<8,8,1>D 0xbf800000D
589 * and negate g0.0<0,1,0>W for (gl_FrontFacing ? -1.0 : 1.0).
591 * This negation looks like it's safe in practice, because bits 0:4 will
592 * surely be TRIANGLES
595 if (value1
== -1.0f
) {
599 bld
.OR(subscript(tmp
, BRW_REGISTER_TYPE_W
, 1),
600 g0
, brw_imm_uw(0x3f80));
602 /* Bit 31 of g1.6 is 0 if the polygon is front facing. */
603 fs_reg g1_6
= fs_reg(retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_D
));
605 /* For (gl_FrontFacing ? 1.0 : -1.0), emit:
607 * or(8) tmp<1>D g1.6<0,1,0>D 0x3f800000D
608 * and(8) dst<1>D tmp<8,8,1>D 0xbf800000D
610 * and negate g1.6<0,1,0>D for (gl_FrontFacing ? -1.0 : 1.0).
612 * This negation looks like it's safe in practice, because bits 0:4 will
613 * surely be TRIANGLES
616 if (value1
== -1.0f
) {
620 bld
.OR(tmp
, g1_6
, brw_imm_d(0x3f800000));
622 bld
.AND(retype(result
, BRW_REGISTER_TYPE_D
), tmp
, brw_imm_d(0xbf800000));
628 emit_find_msb_using_lzd(const fs_builder
&bld
,
629 const fs_reg
&result
,
637 /* LZD of an absolute value source almost always does the right
638 * thing. There are two problem values:
640 * * 0x80000000. Since abs(0x80000000) == 0x80000000, LZD returns
641 * 0. However, findMSB(int(0x80000000)) == 30.
643 * * 0xffffffff. Since abs(0xffffffff) == 1, LZD returns
644 * 31. Section 8.8 (Integer Functions) of the GLSL 4.50 spec says:
646 * For a value of zero or negative one, -1 will be returned.
648 * * Negative powers of two. LZD(abs(-(1<<x))) returns x, but
649 * findMSB(-(1<<x)) should return x-1.
651 * For all negative number cases, including 0x80000000 and
652 * 0xffffffff, the correct value is obtained from LZD if instead of
653 * negating the (already negative) value the logical-not is used. A
654 * conditonal logical-not can be achieved in two instructions.
656 temp
= bld
.vgrf(BRW_REGISTER_TYPE_D
);
658 bld
.ASR(temp
, src
, brw_imm_d(31));
659 bld
.XOR(temp
, temp
, src
);
662 bld
.LZD(retype(result
, BRW_REGISTER_TYPE_UD
),
663 retype(temp
, BRW_REGISTER_TYPE_UD
));
665 /* LZD counts from the MSB side, while GLSL's findMSB() wants the count
666 * from the LSB side. Subtract the result from 31 to convert the MSB
667 * count into an LSB count. If no bits are set, LZD will return 32.
668 * 31-32 = -1, which is exactly what findMSB() is supposed to return.
670 inst
= bld
.ADD(result
, retype(result
, BRW_REGISTER_TYPE_D
), brw_imm_d(31));
671 inst
->src
[0].negate
= true;
675 brw_rnd_mode_from_nir_op (const nir_op op
) {
677 case nir_op_f2f16_rtz
:
678 return BRW_RND_MODE_RTZ
;
679 case nir_op_f2f16_rtne
:
680 return BRW_RND_MODE_RTNE
;
682 unreachable("Operation doesn't support rounding mode");
687 fs_visitor::prepare_alu_destination_and_sources(const fs_builder
&bld
,
688 nir_alu_instr
*instr
,
693 need_dest
? get_nir_dest(instr
->dest
.dest
) : bld
.null_reg_ud();
695 result
.type
= brw_type_for_nir_type(devinfo
,
696 (nir_alu_type
)(nir_op_infos
[instr
->op
].output_type
|
697 nir_dest_bit_size(instr
->dest
.dest
)));
699 for (unsigned i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++) {
700 op
[i
] = get_nir_src(instr
->src
[i
].src
);
701 op
[i
].type
= brw_type_for_nir_type(devinfo
,
702 (nir_alu_type
)(nir_op_infos
[instr
->op
].input_types
[i
] |
703 nir_src_bit_size(instr
->src
[i
].src
)));
704 op
[i
].abs
= instr
->src
[i
].abs
;
705 op
[i
].negate
= instr
->src
[i
].negate
;
708 /* Move and vecN instrutions may still be vectored. Return the raw,
709 * vectored source and destination so that fs_visitor::nir_emit_alu can
710 * handle it. Other callers should not have to handle these kinds of
723 /* At this point, we have dealt with any instruction that operates on
724 * more than a single channel. Therefore, we can just adjust the source
725 * and destination registers for that channel and emit the instruction.
727 unsigned channel
= 0;
728 if (nir_op_infos
[instr
->op
].output_size
== 0) {
729 /* Since NIR is doing the scalarizing for us, we should only ever see
730 * vectorized operations with a single channel.
732 assert(util_bitcount(instr
->dest
.write_mask
) == 1);
733 channel
= ffs(instr
->dest
.write_mask
) - 1;
735 result
= offset(result
, bld
, channel
);
738 for (unsigned i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++) {
739 assert(nir_op_infos
[instr
->op
].input_sizes
[i
] < 2);
740 op
[i
] = offset(op
[i
], bld
, instr
->src
[i
].swizzle
[channel
]);
747 fs_visitor::resolve_inot_sources(const fs_builder
&bld
, nir_alu_instr
*instr
,
750 for (unsigned i
= 0; i
< 2; i
++) {
751 nir_alu_instr
*inot_instr
= nir_src_as_alu_instr(instr
->src
[i
].src
);
753 if (inot_instr
!= NULL
&& inot_instr
->op
== nir_op_inot
&&
754 !inot_instr
->src
[0].abs
&& !inot_instr
->src
[0].negate
) {
755 /* The source of the inot is now the source of instr. */
756 prepare_alu_destination_and_sources(bld
, inot_instr
, &op
[i
], false);
758 assert(!op
[i
].negate
);
761 op
[i
] = resolve_source_modifiers(op
[i
]);
767 fs_visitor::try_emit_b2fi_of_inot(const fs_builder
&bld
,
769 nir_alu_instr
*instr
)
771 if (devinfo
->gen
< 6 || devinfo
->gen
>= 12)
774 nir_alu_instr
*inot_instr
= nir_src_as_alu_instr(instr
->src
[0].src
);
776 if (inot_instr
== NULL
|| inot_instr
->op
!= nir_op_inot
)
779 /* HF is also possible as a destination on BDW+. For nir_op_b2i, the set
780 * of valid size-changing combinations is a bit more complex.
782 * The source restriction is just because I was lazy about generating the
785 if (nir_dest_bit_size(instr
->dest
.dest
) != 32 ||
786 nir_src_bit_size(inot_instr
->src
[0].src
) != 32)
789 /* b2[fi](inot(a)) maps a=0 => 1, a=-1 => 0. Since a can only be 0 or -1,
790 * this is float(1 + a).
794 prepare_alu_destination_and_sources(bld
, inot_instr
, &op
, false);
796 /* Ignore the saturate modifier, if there is one. The result of the
797 * arithmetic can only be 0 or 1, so the clamping will do nothing anyway.
799 bld
.ADD(result
, op
, brw_imm_d(1));
805 * Emit code for nir_op_fsign possibly fused with a nir_op_fmul
807 * If \c instr is not the \c nir_op_fsign, then \c fsign_src is the index of
808 * the source of \c instr that is a \c nir_op_fsign.
811 fs_visitor::emit_fsign(const fs_builder
&bld
, const nir_alu_instr
*instr
,
812 fs_reg result
, fs_reg
*op
, unsigned fsign_src
)
816 assert(instr
->op
== nir_op_fsign
|| instr
->op
== nir_op_fmul
);
817 assert(fsign_src
< nir_op_infos
[instr
->op
].num_inputs
);
819 if (instr
->op
!= nir_op_fsign
) {
820 const nir_alu_instr
*const fsign_instr
=
821 nir_src_as_alu_instr(instr
->src
[fsign_src
].src
);
823 assert(!fsign_instr
->dest
.saturate
);
825 /* op[fsign_src] has the nominal result of the fsign, and op[1 -
826 * fsign_src] has the other multiply source. This must be rearranged so
827 * that op[0] is the source of the fsign op[1] is the other multiply
833 op
[0] = get_nir_src(fsign_instr
->src
[0].src
);
835 const nir_alu_type t
=
836 (nir_alu_type
)(nir_op_infos
[instr
->op
].input_types
[0] |
837 nir_src_bit_size(fsign_instr
->src
[0].src
));
839 op
[0].type
= brw_type_for_nir_type(devinfo
, t
);
840 op
[0].abs
= fsign_instr
->src
[0].abs
;
841 op
[0].negate
= fsign_instr
->src
[0].negate
;
843 unsigned channel
= 0;
844 if (nir_op_infos
[instr
->op
].output_size
== 0) {
845 /* Since NIR is doing the scalarizing for us, we should only ever see
846 * vectorized operations with a single channel.
848 assert(util_bitcount(instr
->dest
.write_mask
) == 1);
849 channel
= ffs(instr
->dest
.write_mask
) - 1;
852 op
[0] = offset(op
[0], bld
, fsign_instr
->src
[0].swizzle
[channel
]);
854 assert(!instr
->dest
.saturate
);
858 /* Straightforward since the source can be assumed to be either strictly
859 * >= 0 or strictly <= 0 depending on the setting of the negate flag.
861 set_condmod(BRW_CONDITIONAL_NZ
, bld
.MOV(result
, op
[0]));
863 if (instr
->op
== nir_op_fsign
) {
864 inst
= (op
[0].negate
)
865 ? bld
.MOV(result
, brw_imm_f(-1.0f
))
866 : bld
.MOV(result
, brw_imm_f(1.0f
));
868 op
[1].negate
= (op
[0].negate
!= op
[1].negate
);
869 inst
= bld
.MOV(result
, op
[1]);
872 set_predicate(BRW_PREDICATE_NORMAL
, inst
);
873 } else if (type_sz(op
[0].type
) == 2) {
874 /* AND(val, 0x8000) gives the sign bit.
876 * Predicated OR ORs 1.0 (0x3c00) with the sign bit if val is not zero.
878 fs_reg zero
= retype(brw_imm_uw(0), BRW_REGISTER_TYPE_HF
);
879 bld
.CMP(bld
.null_reg_f(), op
[0], zero
, BRW_CONDITIONAL_NZ
);
881 op
[0].type
= BRW_REGISTER_TYPE_UW
;
882 result
.type
= BRW_REGISTER_TYPE_UW
;
883 bld
.AND(result
, op
[0], brw_imm_uw(0x8000u
));
885 if (instr
->op
== nir_op_fsign
)
886 inst
= bld
.OR(result
, result
, brw_imm_uw(0x3c00u
));
888 /* Use XOR here to get the result sign correct. */
889 inst
= bld
.XOR(result
, result
, retype(op
[1], BRW_REGISTER_TYPE_UW
));
892 inst
->predicate
= BRW_PREDICATE_NORMAL
;
893 } else if (type_sz(op
[0].type
) == 4) {
894 /* AND(val, 0x80000000) gives the sign bit.
896 * Predicated OR ORs 1.0 (0x3f800000) with the sign bit if val is not
899 bld
.CMP(bld
.null_reg_f(), op
[0], brw_imm_f(0.0f
), BRW_CONDITIONAL_NZ
);
901 op
[0].type
= BRW_REGISTER_TYPE_UD
;
902 result
.type
= BRW_REGISTER_TYPE_UD
;
903 bld
.AND(result
, op
[0], brw_imm_ud(0x80000000u
));
905 if (instr
->op
== nir_op_fsign
)
906 inst
= bld
.OR(result
, result
, brw_imm_ud(0x3f800000u
));
908 /* Use XOR here to get the result sign correct. */
909 inst
= bld
.XOR(result
, result
, retype(op
[1], BRW_REGISTER_TYPE_UD
));
912 inst
->predicate
= BRW_PREDICATE_NORMAL
;
914 /* For doubles we do the same but we need to consider:
916 * - 2-src instructions can't operate with 64-bit immediates
917 * - The sign is encoded in the high 32-bit of each DF
918 * - We need to produce a DF result.
921 fs_reg zero
= vgrf(glsl_type::double_type
);
922 bld
.MOV(zero
, setup_imm_df(bld
, 0.0));
923 bld
.CMP(bld
.null_reg_df(), op
[0], zero
, BRW_CONDITIONAL_NZ
);
925 bld
.MOV(result
, zero
);
927 fs_reg r
= subscript(result
, BRW_REGISTER_TYPE_UD
, 1);
928 bld
.AND(r
, subscript(op
[0], BRW_REGISTER_TYPE_UD
, 1),
929 brw_imm_ud(0x80000000u
));
931 if (instr
->op
== nir_op_fsign
) {
932 set_predicate(BRW_PREDICATE_NORMAL
,
933 bld
.OR(r
, r
, brw_imm_ud(0x3ff00000u
)));
935 /* This could be done better in some cases. If the scale is an
936 * immediate with the low 32-bits all 0, emitting a separate XOR and
937 * OR would allow an algebraic optimization to remove the OR. There
938 * are currently zero instances of fsign(double(x))*IMM in shader-db
939 * or any test suite, so it is hard to care at this time.
941 fs_reg result_int64
= retype(result
, BRW_REGISTER_TYPE_UQ
);
942 inst
= bld
.XOR(result_int64
, result_int64
,
943 retype(op
[1], BRW_REGISTER_TYPE_UQ
));
949 * Deteremine whether sources of a nir_op_fmul can be fused with a nir_op_fsign
951 * Checks the operands of a \c nir_op_fmul to determine whether or not
952 * \c emit_fsign could fuse the multiplication with the \c sign() calculation.
954 * \param instr The multiplication instruction
956 * \param fsign_src The source of \c instr that may or may not be a
960 can_fuse_fmul_fsign(nir_alu_instr
*instr
, unsigned fsign_src
)
962 assert(instr
->op
== nir_op_fmul
);
964 nir_alu_instr
*const fsign_instr
=
965 nir_src_as_alu_instr(instr
->src
[fsign_src
].src
);
969 * 1. instr->src[fsign_src] must be a nir_op_fsign.
970 * 2. The nir_op_fsign can only be used by this multiplication.
971 * 3. The source that is the nir_op_fsign does not have source modifiers.
972 * \c emit_fsign only examines the source modifiers of the source of the
975 * The nir_op_fsign must also not have the saturate modifier, but steps
976 * have already been taken (in nir_opt_algebraic) to ensure that.
978 return fsign_instr
!= NULL
&& fsign_instr
->op
== nir_op_fsign
&&
979 is_used_once(fsign_instr
) &&
980 !instr
->src
[fsign_src
].abs
&& !instr
->src
[fsign_src
].negate
;
984 fs_visitor::nir_emit_alu(const fs_builder
&bld
, nir_alu_instr
*instr
)
986 struct brw_wm_prog_key
*fs_key
= (struct brw_wm_prog_key
*) this->key
;
990 fs_reg result
= prepare_alu_destination_and_sources(bld
, instr
, op
, true);
997 fs_reg temp
= result
;
998 bool need_extra_copy
= false;
999 for (unsigned i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++) {
1000 if (!instr
->src
[i
].src
.is_ssa
&&
1001 instr
->dest
.dest
.reg
.reg
== instr
->src
[i
].src
.reg
.reg
) {
1002 need_extra_copy
= true;
1003 temp
= bld
.vgrf(result
.type
, 4);
1008 for (unsigned i
= 0; i
< 4; i
++) {
1009 if (!(instr
->dest
.write_mask
& (1 << i
)))
1012 if (instr
->op
== nir_op_mov
) {
1013 inst
= bld
.MOV(offset(temp
, bld
, i
),
1014 offset(op
[0], bld
, instr
->src
[0].swizzle
[i
]));
1016 inst
= bld
.MOV(offset(temp
, bld
, i
),
1017 offset(op
[i
], bld
, instr
->src
[i
].swizzle
[0]));
1019 inst
->saturate
= instr
->dest
.saturate
;
1022 /* In this case the source and destination registers were the same,
1023 * so we need to insert an extra set of moves in order to deal with
1026 if (need_extra_copy
) {
1027 for (unsigned i
= 0; i
< 4; i
++) {
1028 if (!(instr
->dest
.write_mask
& (1 << i
)))
1031 bld
.MOV(offset(result
, bld
, i
), offset(temp
, bld
, i
));
1039 if (optimize_extract_to_float(instr
, result
))
1041 inst
= bld
.MOV(result
, op
[0]);
1042 inst
->saturate
= instr
->dest
.saturate
;
1045 case nir_op_f2f16_rtne
:
1046 case nir_op_f2f16_rtz
:
1047 bld
.emit(SHADER_OPCODE_RND_MODE
, bld
.null_reg_ud(),
1048 brw_imm_d(brw_rnd_mode_from_nir_op(instr
->op
)));
1051 /* In theory, it would be better to use BRW_OPCODE_F32TO16. Depending
1052 * on the HW gen, it is a special hw opcode or just a MOV, and
1053 * brw_F32TO16 (at brw_eu_emit) would do the work to chose.
1055 * But if we want to use that opcode, we need to provide support on
1056 * different optimizations and lowerings. As right now HF support is
1057 * only for gen8+, it will be better to use directly the MOV, and use
1058 * BRW_OPCODE_F32TO16 when/if we work for HF support on gen7.
1060 assert(type_sz(op
[0].type
) < 8); /* brw_nir_lower_conversions */
1061 inst
= bld
.MOV(result
, op
[0]);
1062 inst
->saturate
= instr
->dest
.saturate
;
1072 if (try_emit_b2fi_of_inot(bld
, result
, instr
))
1074 op
[0].type
= BRW_REGISTER_TYPE_D
;
1075 op
[0].negate
= !op
[0].negate
;
1099 if (result
.type
== BRW_REGISTER_TYPE_B
||
1100 result
.type
== BRW_REGISTER_TYPE_UB
||
1101 result
.type
== BRW_REGISTER_TYPE_HF
)
1102 assert(type_sz(op
[0].type
) < 8); /* brw_nir_lower_conversions */
1104 if (op
[0].type
== BRW_REGISTER_TYPE_B
||
1105 op
[0].type
== BRW_REGISTER_TYPE_UB
||
1106 op
[0].type
== BRW_REGISTER_TYPE_HF
)
1107 assert(type_sz(result
.type
) < 8); /* brw_nir_lower_conversions */
1109 inst
= bld
.MOV(result
, op
[0]);
1110 inst
->saturate
= instr
->dest
.saturate
;
1114 inst
= bld
.MOV(result
, op
[0]);
1115 inst
->saturate
= true;
1120 op
[0].negate
= true;
1121 inst
= bld
.MOV(result
, op
[0]);
1122 if (instr
->op
== nir_op_fneg
)
1123 inst
->saturate
= instr
->dest
.saturate
;
1128 op
[0].negate
= false;
1130 inst
= bld
.MOV(result
, op
[0]);
1131 if (instr
->op
== nir_op_fabs
)
1132 inst
->saturate
= instr
->dest
.saturate
;
1136 emit_fsign(bld
, instr
, result
, op
, 0);
1140 inst
= bld
.emit(SHADER_OPCODE_RCP
, result
, op
[0]);
1141 inst
->saturate
= instr
->dest
.saturate
;
1145 inst
= bld
.emit(SHADER_OPCODE_EXP2
, result
, op
[0]);
1146 inst
->saturate
= instr
->dest
.saturate
;
1150 inst
= bld
.emit(SHADER_OPCODE_LOG2
, result
, op
[0]);
1151 inst
->saturate
= instr
->dest
.saturate
;
1155 inst
= bld
.emit(SHADER_OPCODE_SIN
, result
, op
[0]);
1156 inst
->saturate
= instr
->dest
.saturate
;
1160 inst
= bld
.emit(SHADER_OPCODE_COS
, result
, op
[0]);
1161 inst
->saturate
= instr
->dest
.saturate
;
1165 if (fs_key
->high_quality_derivatives
) {
1166 inst
= bld
.emit(FS_OPCODE_DDX_FINE
, result
, op
[0]);
1168 inst
= bld
.emit(FS_OPCODE_DDX_COARSE
, result
, op
[0]);
1170 inst
->saturate
= instr
->dest
.saturate
;
1172 case nir_op_fddx_fine
:
1173 inst
= bld
.emit(FS_OPCODE_DDX_FINE
, result
, op
[0]);
1174 inst
->saturate
= instr
->dest
.saturate
;
1176 case nir_op_fddx_coarse
:
1177 inst
= bld
.emit(FS_OPCODE_DDX_COARSE
, result
, op
[0]);
1178 inst
->saturate
= instr
->dest
.saturate
;
1181 if (fs_key
->high_quality_derivatives
) {
1182 inst
= bld
.emit(FS_OPCODE_DDY_FINE
, result
, op
[0]);
1184 inst
= bld
.emit(FS_OPCODE_DDY_COARSE
, result
, op
[0]);
1186 inst
->saturate
= instr
->dest
.saturate
;
1188 case nir_op_fddy_fine
:
1189 inst
= bld
.emit(FS_OPCODE_DDY_FINE
, result
, op
[0]);
1190 inst
->saturate
= instr
->dest
.saturate
;
1192 case nir_op_fddy_coarse
:
1193 inst
= bld
.emit(FS_OPCODE_DDY_COARSE
, result
, op
[0]);
1194 inst
->saturate
= instr
->dest
.saturate
;
1199 inst
= bld
.ADD(result
, op
[0], op
[1]);
1200 inst
->saturate
= instr
->dest
.saturate
;
1203 case nir_op_uadd_sat
:
1204 inst
= bld
.ADD(result
, op
[0], op
[1]);
1205 inst
->saturate
= true;
1209 for (unsigned i
= 0; i
< 2; i
++) {
1210 if (can_fuse_fmul_fsign(instr
, i
)) {
1211 emit_fsign(bld
, instr
, result
, op
, i
);
1216 inst
= bld
.MUL(result
, op
[0], op
[1]);
1217 inst
->saturate
= instr
->dest
.saturate
;
1220 case nir_op_imul_2x32_64
:
1221 case nir_op_umul_2x32_64
:
1222 bld
.MUL(result
, op
[0], op
[1]);
1226 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1227 bld
.MUL(result
, op
[0], op
[1]);
1230 case nir_op_imul_high
:
1231 case nir_op_umul_high
:
1232 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1233 bld
.emit(SHADER_OPCODE_MULH
, result
, op
[0], op
[1]);
1238 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1239 bld
.emit(SHADER_OPCODE_INT_QUOTIENT
, result
, op
[0], op
[1]);
1242 case nir_op_uadd_carry
:
1243 unreachable("Should have been lowered by carry_to_arith().");
1245 case nir_op_usub_borrow
:
1246 unreachable("Should have been lowered by borrow_to_arith().");
1250 /* According to the sign table for INT DIV in the Ivy Bridge PRM, it
1251 * appears that our hardware just does the right thing for signed
1254 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1255 bld
.emit(SHADER_OPCODE_INT_REMAINDER
, result
, op
[0], op
[1]);
1259 /* Get a regular C-style remainder. If a % b == 0, set the predicate. */
1260 bld
.emit(SHADER_OPCODE_INT_REMAINDER
, result
, op
[0], op
[1]);
1262 /* Math instructions don't support conditional mod */
1263 inst
= bld
.MOV(bld
.null_reg_d(), result
);
1264 inst
->conditional_mod
= BRW_CONDITIONAL_NZ
;
1266 /* Now, we need to determine if signs of the sources are different.
1267 * When we XOR the sources, the top bit is 0 if they are the same and 1
1268 * if they are different. We can then use a conditional modifier to
1269 * turn that into a predicate. This leads us to an XOR.l instruction.
1271 * Technically, according to the PRM, you're not allowed to use .l on a
1272 * XOR instruction. However, emperical experiments and Curro's reading
1273 * of the simulator source both indicate that it's safe.
1275 fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_D
);
1276 inst
= bld
.XOR(tmp
, op
[0], op
[1]);
1277 inst
->predicate
= BRW_PREDICATE_NORMAL
;
1278 inst
->conditional_mod
= BRW_CONDITIONAL_L
;
1280 /* If the result of the initial remainder operation is non-zero and the
1281 * two sources have different signs, add in a copy of op[1] to get the
1282 * final integer modulus value.
1284 inst
= bld
.ADD(result
, result
, op
[1]);
1285 inst
->predicate
= BRW_PREDICATE_NORMAL
;
1292 case nir_op_fne32
: {
1293 fs_reg dest
= result
;
1295 const uint32_t bit_size
= nir_src_bit_size(instr
->src
[0].src
);
1297 dest
= bld
.vgrf(op
[0].type
, 1);
1299 brw_conditional_mod cond
;
1300 switch (instr
->op
) {
1302 cond
= BRW_CONDITIONAL_L
;
1305 cond
= BRW_CONDITIONAL_GE
;
1308 cond
= BRW_CONDITIONAL_Z
;
1311 cond
= BRW_CONDITIONAL_NZ
;
1314 unreachable("bad opcode");
1317 bld
.CMP(dest
, op
[0], op
[1], cond
);
1319 if (bit_size
> 32) {
1320 bld
.MOV(result
, subscript(dest
, BRW_REGISTER_TYPE_UD
, 0));
1321 } else if(bit_size
< 32) {
1322 /* When we convert the result to 32-bit we need to be careful and do
1323 * it as a signed conversion to get sign extension (for 32-bit true)
1325 const brw_reg_type src_type
=
1326 brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_D
);
1328 bld
.MOV(retype(result
, BRW_REGISTER_TYPE_D
), retype(dest
, src_type
));
1338 case nir_op_ine32
: {
1339 fs_reg dest
= result
;
1341 const uint32_t bit_size
= nir_src_bit_size(instr
->src
[0].src
);
1343 dest
= bld
.vgrf(op
[0].type
, 1);
1345 brw_conditional_mod cond
;
1346 switch (instr
->op
) {
1349 cond
= BRW_CONDITIONAL_L
;
1353 cond
= BRW_CONDITIONAL_GE
;
1356 cond
= BRW_CONDITIONAL_Z
;
1359 cond
= BRW_CONDITIONAL_NZ
;
1362 unreachable("bad opcode");
1364 bld
.CMP(dest
, op
[0], op
[1], cond
);
1366 if (bit_size
> 32) {
1367 bld
.MOV(result
, subscript(dest
, BRW_REGISTER_TYPE_UD
, 0));
1368 } else if (bit_size
< 32) {
1369 /* When we convert the result to 32-bit we need to be careful and do
1370 * it as a signed conversion to get sign extension (for 32-bit true)
1372 const brw_reg_type src_type
=
1373 brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_D
);
1375 bld
.MOV(retype(result
, BRW_REGISTER_TYPE_D
), retype(dest
, src_type
));
1381 if (devinfo
->gen
>= 8) {
1382 nir_alu_instr
*inot_src_instr
= nir_src_as_alu_instr(instr
->src
[0].src
);
1384 if (inot_src_instr
!= NULL
&&
1385 (inot_src_instr
->op
== nir_op_ior
||
1386 inot_src_instr
->op
== nir_op_ixor
||
1387 inot_src_instr
->op
== nir_op_iand
) &&
1388 !inot_src_instr
->src
[0].abs
&&
1389 !inot_src_instr
->src
[0].negate
&&
1390 !inot_src_instr
->src
[1].abs
&&
1391 !inot_src_instr
->src
[1].negate
) {
1392 /* The sources of the source logical instruction are now the
1393 * sources of the instruction that will be generated.
1395 prepare_alu_destination_and_sources(bld
, inot_src_instr
, op
, false);
1396 resolve_inot_sources(bld
, inot_src_instr
, op
);
1398 /* Smash all of the sources and destination to be signed. This
1399 * doesn't matter for the operation of the instruction, but cmod
1400 * propagation fails on unsigned sources with negation (due to
1401 * fs_inst::can_do_cmod returning false).
1404 brw_type_for_nir_type(devinfo
,
1405 (nir_alu_type
)(nir_type_int
|
1406 nir_dest_bit_size(instr
->dest
.dest
)));
1408 brw_type_for_nir_type(devinfo
,
1409 (nir_alu_type
)(nir_type_int
|
1410 nir_src_bit_size(inot_src_instr
->src
[0].src
)));
1412 brw_type_for_nir_type(devinfo
,
1413 (nir_alu_type
)(nir_type_int
|
1414 nir_src_bit_size(inot_src_instr
->src
[1].src
)));
1416 /* For XOR, only invert one of the sources. Arbitrarily choose
1419 op
[0].negate
= !op
[0].negate
;
1420 if (inot_src_instr
->op
!= nir_op_ixor
)
1421 op
[1].negate
= !op
[1].negate
;
1423 switch (inot_src_instr
->op
) {
1425 bld
.AND(result
, op
[0], op
[1]);
1429 bld
.OR(result
, op
[0], op
[1]);
1433 bld
.XOR(result
, op
[0], op
[1]);
1437 unreachable("impossible opcode");
1440 op
[0] = resolve_source_modifiers(op
[0]);
1442 bld
.NOT(result
, op
[0]);
1445 if (devinfo
->gen
>= 8) {
1446 resolve_inot_sources(bld
, instr
, op
);
1448 bld
.XOR(result
, op
[0], op
[1]);
1451 if (devinfo
->gen
>= 8) {
1452 resolve_inot_sources(bld
, instr
, op
);
1454 bld
.OR(result
, op
[0], op
[1]);
1457 if (devinfo
->gen
>= 8) {
1458 resolve_inot_sources(bld
, instr
, op
);
1460 bld
.AND(result
, op
[0], op
[1]);
1466 case nir_op_b32all_fequal2
:
1467 case nir_op_b32all_iequal2
:
1468 case nir_op_b32all_fequal3
:
1469 case nir_op_b32all_iequal3
:
1470 case nir_op_b32all_fequal4
:
1471 case nir_op_b32all_iequal4
:
1472 case nir_op_b32any_fnequal2
:
1473 case nir_op_b32any_inequal2
:
1474 case nir_op_b32any_fnequal3
:
1475 case nir_op_b32any_inequal3
:
1476 case nir_op_b32any_fnequal4
:
1477 case nir_op_b32any_inequal4
:
1478 unreachable("Lowered by nir_lower_alu_reductions");
1480 case nir_op_fnoise1_1
:
1481 case nir_op_fnoise1_2
:
1482 case nir_op_fnoise1_3
:
1483 case nir_op_fnoise1_4
:
1484 case nir_op_fnoise2_1
:
1485 case nir_op_fnoise2_2
:
1486 case nir_op_fnoise2_3
:
1487 case nir_op_fnoise2_4
:
1488 case nir_op_fnoise3_1
:
1489 case nir_op_fnoise3_2
:
1490 case nir_op_fnoise3_3
:
1491 case nir_op_fnoise3_4
:
1492 case nir_op_fnoise4_1
:
1493 case nir_op_fnoise4_2
:
1494 case nir_op_fnoise4_3
:
1495 case nir_op_fnoise4_4
:
1496 unreachable("not reached: should be handled by lower_noise");
1499 unreachable("not reached: should be handled by ldexp_to_arith()");
1502 inst
= bld
.emit(SHADER_OPCODE_SQRT
, result
, op
[0]);
1503 inst
->saturate
= instr
->dest
.saturate
;
1507 inst
= bld
.emit(SHADER_OPCODE_RSQ
, result
, op
[0]);
1508 inst
->saturate
= instr
->dest
.saturate
;
1512 case nir_op_f2b32
: {
1513 uint32_t bit_size
= nir_src_bit_size(instr
->src
[0].src
);
1514 if (bit_size
== 64) {
1515 /* two-argument instructions can't take 64-bit immediates */
1519 if (instr
->op
== nir_op_f2b32
) {
1520 zero
= vgrf(glsl_type::double_type
);
1521 tmp
= vgrf(glsl_type::double_type
);
1522 bld
.MOV(zero
, setup_imm_df(bld
, 0.0));
1524 zero
= vgrf(glsl_type::int64_t_type
);
1525 tmp
= vgrf(glsl_type::int64_t_type
);
1526 bld
.MOV(zero
, brw_imm_q(0));
1529 /* A SIMD16 execution needs to be split in two instructions, so use
1530 * a vgrf instead of the flag register as dst so instruction splitting
1533 bld
.CMP(tmp
, op
[0], zero
, BRW_CONDITIONAL_NZ
);
1534 bld
.MOV(result
, subscript(tmp
, BRW_REGISTER_TYPE_UD
, 0));
1537 if (bit_size
== 32) {
1538 zero
= instr
->op
== nir_op_f2b32
? brw_imm_f(0.0f
) : brw_imm_d(0);
1540 assert(bit_size
== 16);
1541 zero
= instr
->op
== nir_op_f2b32
?
1542 retype(brw_imm_w(0), BRW_REGISTER_TYPE_HF
) : brw_imm_w(0);
1544 bld
.CMP(result
, op
[0], zero
, BRW_CONDITIONAL_NZ
);
1550 inst
= bld
.RNDZ(result
, op
[0]);
1551 inst
->saturate
= instr
->dest
.saturate
;
1554 case nir_op_fceil
: {
1555 op
[0].negate
= !op
[0].negate
;
1556 fs_reg temp
= vgrf(glsl_type::float_type
);
1557 bld
.RNDD(temp
, op
[0]);
1559 inst
= bld
.MOV(result
, temp
);
1560 inst
->saturate
= instr
->dest
.saturate
;
1564 inst
= bld
.RNDD(result
, op
[0]);
1565 inst
->saturate
= instr
->dest
.saturate
;
1568 inst
= bld
.FRC(result
, op
[0]);
1569 inst
->saturate
= instr
->dest
.saturate
;
1571 case nir_op_fround_even
:
1572 inst
= bld
.RNDE(result
, op
[0]);
1573 inst
->saturate
= instr
->dest
.saturate
;
1576 case nir_op_fquantize2f16
: {
1577 fs_reg tmp16
= bld
.vgrf(BRW_REGISTER_TYPE_D
);
1578 fs_reg tmp32
= bld
.vgrf(BRW_REGISTER_TYPE_F
);
1579 fs_reg zero
= bld
.vgrf(BRW_REGISTER_TYPE_F
);
1581 /* The destination stride must be at least as big as the source stride. */
1582 tmp16
.type
= BRW_REGISTER_TYPE_W
;
1585 /* Check for denormal */
1586 fs_reg abs_src0
= op
[0];
1587 abs_src0
.abs
= true;
1588 bld
.CMP(bld
.null_reg_f(), abs_src0
, brw_imm_f(ldexpf(1.0, -14)),
1590 /* Get the appropriately signed zero */
1591 bld
.AND(retype(zero
, BRW_REGISTER_TYPE_UD
),
1592 retype(op
[0], BRW_REGISTER_TYPE_UD
),
1593 brw_imm_ud(0x80000000));
1594 /* Do the actual F32 -> F16 -> F32 conversion */
1595 bld
.emit(BRW_OPCODE_F32TO16
, tmp16
, op
[0]);
1596 bld
.emit(BRW_OPCODE_F16TO32
, tmp32
, tmp16
);
1597 /* Select that or zero based on normal status */
1598 inst
= bld
.SEL(result
, zero
, tmp32
);
1599 inst
->predicate
= BRW_PREDICATE_NORMAL
;
1600 inst
->saturate
= instr
->dest
.saturate
;
1607 inst
= bld
.emit_minmax(result
, op
[0], op
[1], BRW_CONDITIONAL_L
);
1608 inst
->saturate
= instr
->dest
.saturate
;
1614 inst
= bld
.emit_minmax(result
, op
[0], op
[1], BRW_CONDITIONAL_GE
);
1615 inst
->saturate
= instr
->dest
.saturate
;
1618 case nir_op_pack_snorm_2x16
:
1619 case nir_op_pack_snorm_4x8
:
1620 case nir_op_pack_unorm_2x16
:
1621 case nir_op_pack_unorm_4x8
:
1622 case nir_op_unpack_snorm_2x16
:
1623 case nir_op_unpack_snorm_4x8
:
1624 case nir_op_unpack_unorm_2x16
:
1625 case nir_op_unpack_unorm_4x8
:
1626 case nir_op_unpack_half_2x16
:
1627 case nir_op_pack_half_2x16
:
1628 unreachable("not reached: should be handled by lower_packing_builtins");
1630 case nir_op_unpack_half_2x16_split_x
:
1631 inst
= bld
.emit(BRW_OPCODE_F16TO32
, result
,
1632 subscript(op
[0], BRW_REGISTER_TYPE_UW
, 0));
1633 inst
->saturate
= instr
->dest
.saturate
;
1635 case nir_op_unpack_half_2x16_split_y
:
1636 inst
= bld
.emit(BRW_OPCODE_F16TO32
, result
,
1637 subscript(op
[0], BRW_REGISTER_TYPE_UW
, 1));
1638 inst
->saturate
= instr
->dest
.saturate
;
1641 case nir_op_pack_64_2x32_split
:
1642 case nir_op_pack_32_2x16_split
:
1643 bld
.emit(FS_OPCODE_PACK
, result
, op
[0], op
[1]);
1646 case nir_op_unpack_64_2x32_split_x
:
1647 case nir_op_unpack_64_2x32_split_y
: {
1648 if (instr
->op
== nir_op_unpack_64_2x32_split_x
)
1649 bld
.MOV(result
, subscript(op
[0], BRW_REGISTER_TYPE_UD
, 0));
1651 bld
.MOV(result
, subscript(op
[0], BRW_REGISTER_TYPE_UD
, 1));
1655 case nir_op_unpack_32_2x16_split_x
:
1656 case nir_op_unpack_32_2x16_split_y
: {
1657 if (instr
->op
== nir_op_unpack_32_2x16_split_x
)
1658 bld
.MOV(result
, subscript(op
[0], BRW_REGISTER_TYPE_UW
, 0));
1660 bld
.MOV(result
, subscript(op
[0], BRW_REGISTER_TYPE_UW
, 1));
1665 inst
= bld
.emit(SHADER_OPCODE_POW
, result
, op
[0], op
[1]);
1666 inst
->saturate
= instr
->dest
.saturate
;
1669 case nir_op_bitfield_reverse
:
1670 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1671 bld
.BFREV(result
, op
[0]);
1674 case nir_op_bit_count
:
1675 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1676 bld
.CBIT(result
, op
[0]);
1679 case nir_op_ufind_msb
: {
1680 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1681 emit_find_msb_using_lzd(bld
, result
, op
[0], false);
1685 case nir_op_ifind_msb
: {
1686 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1688 if (devinfo
->gen
< 7) {
1689 emit_find_msb_using_lzd(bld
, result
, op
[0], true);
1691 bld
.FBH(retype(result
, BRW_REGISTER_TYPE_UD
), op
[0]);
1693 /* FBH counts from the MSB side, while GLSL's findMSB() wants the
1694 * count from the LSB side. If FBH didn't return an error
1695 * (0xFFFFFFFF), then subtract the result from 31 to convert the MSB
1696 * count into an LSB count.
1698 bld
.CMP(bld
.null_reg_d(), result
, brw_imm_d(-1), BRW_CONDITIONAL_NZ
);
1700 inst
= bld
.ADD(result
, result
, brw_imm_d(31));
1701 inst
->predicate
= BRW_PREDICATE_NORMAL
;
1702 inst
->src
[0].negate
= true;
1707 case nir_op_find_lsb
:
1708 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1710 if (devinfo
->gen
< 7) {
1711 fs_reg temp
= vgrf(glsl_type::int_type
);
1713 /* (x & -x) generates a value that consists of only the LSB of x.
1714 * For all powers of 2, findMSB(y) == findLSB(y).
1716 fs_reg src
= retype(op
[0], BRW_REGISTER_TYPE_D
);
1717 fs_reg negated_src
= src
;
1719 /* One must be negated, and the other must be non-negated. It
1720 * doesn't matter which is which.
1722 negated_src
.negate
= true;
1725 bld
.AND(temp
, src
, negated_src
);
1726 emit_find_msb_using_lzd(bld
, result
, temp
, false);
1728 bld
.FBL(result
, op
[0]);
1732 case nir_op_ubitfield_extract
:
1733 case nir_op_ibitfield_extract
:
1734 unreachable("should have been lowered");
1737 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1738 bld
.BFE(result
, op
[2], op
[1], op
[0]);
1741 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1742 bld
.BFI1(result
, op
[0], op
[1]);
1745 assert(nir_dest_bit_size(instr
->dest
.dest
) < 64);
1746 bld
.BFI2(result
, op
[0], op
[1], op
[2]);
1749 case nir_op_bitfield_insert
:
1750 unreachable("not reached: should have been lowered");
1753 bld
.SHL(result
, op
[0], op
[1]);
1756 bld
.ASR(result
, op
[0], op
[1]);
1759 bld
.SHR(result
, op
[0], op
[1]);
1762 case nir_op_pack_half_2x16_split
:
1763 bld
.emit(FS_OPCODE_PACK_HALF_2x16_SPLIT
, result
, op
[0], op
[1]);
1767 inst
= bld
.MAD(result
, op
[2], op
[1], op
[0]);
1768 inst
->saturate
= instr
->dest
.saturate
;
1772 inst
= bld
.LRP(result
, op
[0], op
[1], op
[2]);
1773 inst
->saturate
= instr
->dest
.saturate
;
1776 case nir_op_b32csel
:
1777 if (optimize_frontfacing_ternary(instr
, result
))
1780 bld
.CMP(bld
.null_reg_d(), op
[0], brw_imm_d(0), BRW_CONDITIONAL_NZ
);
1781 inst
= bld
.SEL(result
, op
[1], op
[2]);
1782 inst
->predicate
= BRW_PREDICATE_NORMAL
;
1785 case nir_op_extract_u8
:
1786 case nir_op_extract_i8
: {
1787 unsigned byte
= nir_src_as_uint(instr
->src
[1].src
);
1792 * There is no direct conversion from B/UB to Q/UQ or Q/UQ to B/UB.
1793 * Use two instructions and a word or DWord intermediate integer type.
1795 if (nir_dest_bit_size(instr
->dest
.dest
) == 64) {
1796 const brw_reg_type type
= brw_int_type(1, instr
->op
== nir_op_extract_i8
);
1798 if (instr
->op
== nir_op_extract_i8
) {
1799 /* If we need to sign extend, extract to a word first */
1800 fs_reg w_temp
= bld
.vgrf(BRW_REGISTER_TYPE_W
);
1801 bld
.MOV(w_temp
, subscript(op
[0], type
, byte
));
1802 bld
.MOV(result
, w_temp
);
1803 } else if (byte
& 1) {
1804 /* Extract the high byte from the word containing the desired byte
1808 subscript(op
[0], BRW_REGISTER_TYPE_UW
, byte
/ 2),
1811 /* Otherwise use an AND with 0xff and a word type */
1813 subscript(op
[0], BRW_REGISTER_TYPE_UW
, byte
/ 2),
1817 const brw_reg_type type
= brw_int_type(1, instr
->op
== nir_op_extract_i8
);
1818 bld
.MOV(result
, subscript(op
[0], type
, byte
));
1823 case nir_op_extract_u16
:
1824 case nir_op_extract_i16
: {
1825 const brw_reg_type type
= brw_int_type(2, instr
->op
== nir_op_extract_i16
);
1826 unsigned word
= nir_src_as_uint(instr
->src
[1].src
);
1827 bld
.MOV(result
, subscript(op
[0], type
, word
));
1832 unreachable("unhandled instruction");
1835 /* If we need to do a boolean resolve, replace the result with -(x & 1)
1836 * to sign extend the low bit to 0/~0
1838 if (devinfo
->gen
<= 5 &&
1839 (instr
->instr
.pass_flags
& BRW_NIR_BOOLEAN_MASK
) == BRW_NIR_BOOLEAN_NEEDS_RESOLVE
) {
1840 fs_reg masked
= vgrf(glsl_type::int_type
);
1841 bld
.AND(masked
, result
, brw_imm_d(1));
1842 masked
.negate
= true;
1843 bld
.MOV(retype(result
, BRW_REGISTER_TYPE_D
), masked
);
1848 fs_visitor::nir_emit_load_const(const fs_builder
&bld
,
1849 nir_load_const_instr
*instr
)
1851 const brw_reg_type reg_type
=
1852 brw_reg_type_from_bit_size(instr
->def
.bit_size
, BRW_REGISTER_TYPE_D
);
1853 fs_reg reg
= bld
.vgrf(reg_type
, instr
->def
.num_components
);
1855 switch (instr
->def
.bit_size
) {
1857 for (unsigned i
= 0; i
< instr
->def
.num_components
; i
++)
1858 bld
.MOV(offset(reg
, bld
, i
), setup_imm_b(bld
, instr
->value
[i
].i8
));
1862 for (unsigned i
= 0; i
< instr
->def
.num_components
; i
++)
1863 bld
.MOV(offset(reg
, bld
, i
), brw_imm_w(instr
->value
[i
].i16
));
1867 for (unsigned i
= 0; i
< instr
->def
.num_components
; i
++)
1868 bld
.MOV(offset(reg
, bld
, i
), brw_imm_d(instr
->value
[i
].i32
));
1872 assert(devinfo
->gen
>= 7);
1873 if (devinfo
->gen
== 7) {
1874 /* We don't get 64-bit integer types until gen8 */
1875 for (unsigned i
= 0; i
< instr
->def
.num_components
; i
++) {
1876 bld
.MOV(retype(offset(reg
, bld
, i
), BRW_REGISTER_TYPE_DF
),
1877 setup_imm_df(bld
, instr
->value
[i
].f64
));
1880 for (unsigned i
= 0; i
< instr
->def
.num_components
; i
++)
1881 bld
.MOV(offset(reg
, bld
, i
), brw_imm_q(instr
->value
[i
].i64
));
1886 unreachable("Invalid bit size");
1889 nir_ssa_values
[instr
->def
.index
] = reg
;
1893 fs_visitor::get_nir_src(const nir_src
&src
)
1897 if (src
.ssa
->parent_instr
->type
== nir_instr_type_ssa_undef
) {
1898 const brw_reg_type reg_type
=
1899 brw_reg_type_from_bit_size(src
.ssa
->bit_size
, BRW_REGISTER_TYPE_D
);
1900 reg
= bld
.vgrf(reg_type
, src
.ssa
->num_components
);
1902 reg
= nir_ssa_values
[src
.ssa
->index
];
1905 /* We don't handle indirects on locals */
1906 assert(src
.reg
.indirect
== NULL
);
1907 reg
= offset(nir_locals
[src
.reg
.reg
->index
], bld
,
1908 src
.reg
.base_offset
* src
.reg
.reg
->num_components
);
1911 if (nir_src_bit_size(src
) == 64 && devinfo
->gen
== 7) {
1912 /* The only 64-bit type available on gen7 is DF, so use that. */
1913 reg
.type
= BRW_REGISTER_TYPE_DF
;
1915 /* To avoid floating-point denorm flushing problems, set the type by
1916 * default to an integer type - instructions that need floating point
1917 * semantics will set this to F if they need to
1919 reg
.type
= brw_reg_type_from_bit_size(nir_src_bit_size(src
),
1920 BRW_REGISTER_TYPE_D
);
1927 * Return an IMM for constants; otherwise call get_nir_src() as normal.
1929 * This function should not be called on any value which may be 64 bits.
1930 * We could theoretically support 64-bit on gen8+ but we choose not to
1931 * because it wouldn't work in general (no gen7 support) and there are
1932 * enough restrictions in 64-bit immediates that you can't take the return
1933 * value and treat it the same as the result of get_nir_src().
1936 fs_visitor::get_nir_src_imm(const nir_src
&src
)
1938 assert(nir_src_bit_size(src
) == 32);
1939 return nir_src_is_const(src
) ?
1940 fs_reg(brw_imm_d(nir_src_as_int(src
))) : get_nir_src(src
);
1944 fs_visitor::get_nir_dest(const nir_dest
&dest
)
1947 const brw_reg_type reg_type
=
1948 brw_reg_type_from_bit_size(dest
.ssa
.bit_size
,
1949 dest
.ssa
.bit_size
== 8 ?
1950 BRW_REGISTER_TYPE_D
:
1951 BRW_REGISTER_TYPE_F
);
1952 nir_ssa_values
[dest
.ssa
.index
] =
1953 bld
.vgrf(reg_type
, dest
.ssa
.num_components
);
1954 bld
.UNDEF(nir_ssa_values
[dest
.ssa
.index
]);
1955 return nir_ssa_values
[dest
.ssa
.index
];
1957 /* We don't handle indirects on locals */
1958 assert(dest
.reg
.indirect
== NULL
);
1959 return offset(nir_locals
[dest
.reg
.reg
->index
], bld
,
1960 dest
.reg
.base_offset
* dest
.reg
.reg
->num_components
);
1965 fs_visitor::emit_percomp(const fs_builder
&bld
, const fs_inst
&inst
,
1968 for (unsigned i
= 0; i
< 4; i
++) {
1969 if (!((wr_mask
>> i
) & 1))
1972 fs_inst
*new_inst
= new(mem_ctx
) fs_inst(inst
);
1973 new_inst
->dst
= offset(new_inst
->dst
, bld
, i
);
1974 for (unsigned j
= 0; j
< new_inst
->sources
; j
++)
1975 if (new_inst
->src
[j
].file
== VGRF
)
1976 new_inst
->src
[j
] = offset(new_inst
->src
[j
], bld
, i
);
1983 emit_pixel_interpolater_send(const fs_builder
&bld
,
1988 glsl_interp_mode interpolation
)
1990 struct brw_wm_prog_data
*wm_prog_data
=
1991 brw_wm_prog_data(bld
.shader
->stage_prog_data
);
1993 fs_inst
*inst
= bld
.emit(opcode
, dst
, src
, desc
);
1994 /* 2 floats per slot returned */
1995 inst
->size_written
= 2 * dst
.component_size(inst
->exec_size
);
1996 inst
->pi_noperspective
= interpolation
== INTERP_MODE_NOPERSPECTIVE
;
1998 wm_prog_data
->pulls_bary
= true;
2004 * Computes 1 << x, given a D/UD register containing some value x.
2007 intexp2(const fs_builder
&bld
, const fs_reg
&x
)
2009 assert(x
.type
== BRW_REGISTER_TYPE_UD
|| x
.type
== BRW_REGISTER_TYPE_D
);
2011 fs_reg result
= bld
.vgrf(x
.type
, 1);
2012 fs_reg one
= bld
.vgrf(x
.type
, 1);
2014 bld
.MOV(one
, retype(brw_imm_d(1), one
.type
));
2015 bld
.SHL(result
, one
, x
);
2020 fs_visitor::emit_gs_end_primitive(const nir_src
&vertex_count_nir_src
)
2022 assert(stage
== MESA_SHADER_GEOMETRY
);
2024 struct brw_gs_prog_data
*gs_prog_data
= brw_gs_prog_data(prog_data
);
2026 if (gs_compile
->control_data_header_size_bits
== 0)
2029 /* We can only do EndPrimitive() functionality when the control data
2030 * consists of cut bits. Fortunately, the only time it isn't is when the
2031 * output type is points, in which case EndPrimitive() is a no-op.
2033 if (gs_prog_data
->control_data_format
!=
2034 GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_CUT
) {
2038 /* Cut bits use one bit per vertex. */
2039 assert(gs_compile
->control_data_bits_per_vertex
== 1);
2041 fs_reg vertex_count
= get_nir_src(vertex_count_nir_src
);
2042 vertex_count
.type
= BRW_REGISTER_TYPE_UD
;
2044 /* Cut bit n should be set to 1 if EndPrimitive() was called after emitting
2045 * vertex n, 0 otherwise. So all we need to do here is mark bit
2046 * (vertex_count - 1) % 32 in the cut_bits register to indicate that
2047 * EndPrimitive() was called after emitting vertex (vertex_count - 1);
2048 * vec4_gs_visitor::emit_control_data_bits() will take care of the rest.
2050 * Note that if EndPrimitive() is called before emitting any vertices, this
2051 * will cause us to set bit 31 of the control_data_bits register to 1.
2052 * That's fine because:
2054 * - If max_vertices < 32, then vertex number 31 (zero-based) will never be
2055 * output, so the hardware will ignore cut bit 31.
2057 * - If max_vertices == 32, then vertex number 31 is guaranteed to be the
2058 * last vertex, so setting cut bit 31 has no effect (since the primitive
2059 * is automatically ended when the GS terminates).
2061 * - If max_vertices > 32, then the ir_emit_vertex visitor will reset the
2062 * control_data_bits register to 0 when the first vertex is emitted.
2065 const fs_builder abld
= bld
.annotate("end primitive");
2067 /* control_data_bits |= 1 << ((vertex_count - 1) % 32) */
2068 fs_reg prev_count
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2069 abld
.ADD(prev_count
, vertex_count
, brw_imm_ud(0xffffffffu
));
2070 fs_reg mask
= intexp2(abld
, prev_count
);
2071 /* Note: we're relying on the fact that the GEN SHL instruction only pays
2072 * attention to the lower 5 bits of its second source argument, so on this
2073 * architecture, 1 << (vertex_count - 1) is equivalent to 1 <<
2074 * ((vertex_count - 1) % 32).
2076 abld
.OR(this->control_data_bits
, this->control_data_bits
, mask
);
2080 fs_visitor::emit_gs_control_data_bits(const fs_reg
&vertex_count
)
2082 assert(stage
== MESA_SHADER_GEOMETRY
);
2083 assert(gs_compile
->control_data_bits_per_vertex
!= 0);
2085 struct brw_gs_prog_data
*gs_prog_data
= brw_gs_prog_data(prog_data
);
2087 const fs_builder abld
= bld
.annotate("emit control data bits");
2088 const fs_builder fwa_bld
= bld
.exec_all();
2090 /* We use a single UD register to accumulate control data bits (32 bits
2091 * for each of the SIMD8 channels). So we need to write a DWord (32 bits)
2094 * Unfortunately, the URB_WRITE_SIMD8 message uses 128-bit (OWord) offsets.
2095 * We have select a 128-bit group via the Global and Per-Slot Offsets, then
2096 * use the Channel Mask phase to enable/disable which DWord within that
2097 * group to write. (Remember, different SIMD8 channels may have emitted
2098 * different numbers of vertices, so we may need per-slot offsets.)
2100 * Channel masking presents an annoying problem: we may have to replicate
2101 * the data up to 4 times:
2103 * Msg = Handles, Per-Slot Offsets, Channel Masks, Data, Data, Data, Data.
2105 * To avoid penalizing shaders that emit a small number of vertices, we
2106 * can avoid these sometimes: if the size of the control data header is
2107 * <= 128 bits, then there is only 1 OWord. All SIMD8 channels will land
2108 * land in the same 128-bit group, so we can skip per-slot offsets.
2110 * Similarly, if the control data header is <= 32 bits, there is only one
2111 * DWord, so we can skip channel masks.
2113 enum opcode opcode
= SHADER_OPCODE_URB_WRITE_SIMD8
;
2115 fs_reg channel_mask
, per_slot_offset
;
2117 if (gs_compile
->control_data_header_size_bits
> 32) {
2118 opcode
= SHADER_OPCODE_URB_WRITE_SIMD8_MASKED
;
2119 channel_mask
= vgrf(glsl_type::uint_type
);
2122 if (gs_compile
->control_data_header_size_bits
> 128) {
2123 opcode
= SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT
;
2124 per_slot_offset
= vgrf(glsl_type::uint_type
);
2127 /* Figure out which DWord we're trying to write to using the formula:
2129 * dword_index = (vertex_count - 1) * bits_per_vertex / 32
2131 * Since bits_per_vertex is a power of two, and is known at compile
2132 * time, this can be optimized to:
2134 * dword_index = (vertex_count - 1) >> (6 - log2(bits_per_vertex))
2136 if (opcode
!= SHADER_OPCODE_URB_WRITE_SIMD8
) {
2137 fs_reg dword_index
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2138 fs_reg prev_count
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2139 abld
.ADD(prev_count
, vertex_count
, brw_imm_ud(0xffffffffu
));
2140 unsigned log2_bits_per_vertex
=
2141 util_last_bit(gs_compile
->control_data_bits_per_vertex
);
2142 abld
.SHR(dword_index
, prev_count
, brw_imm_ud(6u - log2_bits_per_vertex
));
2144 if (per_slot_offset
.file
!= BAD_FILE
) {
2145 /* Set the per-slot offset to dword_index / 4, so that we'll write to
2146 * the appropriate OWord within the control data header.
2148 abld
.SHR(per_slot_offset
, dword_index
, brw_imm_ud(2u));
2151 /* Set the channel masks to 1 << (dword_index % 4), so that we'll
2152 * write to the appropriate DWORD within the OWORD.
2154 fs_reg channel
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2155 fwa_bld
.AND(channel
, dword_index
, brw_imm_ud(3u));
2156 channel_mask
= intexp2(fwa_bld
, channel
);
2157 /* Then the channel masks need to be in bits 23:16. */
2158 fwa_bld
.SHL(channel_mask
, channel_mask
, brw_imm_ud(16u));
2161 /* Store the control data bits in the message payload and send it. */
2163 if (channel_mask
.file
!= BAD_FILE
)
2164 mlen
+= 4; /* channel masks, plus 3 extra copies of the data */
2165 if (per_slot_offset
.file
!= BAD_FILE
)
2168 fs_reg payload
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, mlen
);
2169 fs_reg
*sources
= ralloc_array(mem_ctx
, fs_reg
, mlen
);
2171 sources
[i
++] = fs_reg(retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD
));
2172 if (per_slot_offset
.file
!= BAD_FILE
)
2173 sources
[i
++] = per_slot_offset
;
2174 if (channel_mask
.file
!= BAD_FILE
)
2175 sources
[i
++] = channel_mask
;
2177 sources
[i
++] = this->control_data_bits
;
2180 abld
.LOAD_PAYLOAD(payload
, sources
, mlen
, mlen
);
2181 fs_inst
*inst
= abld
.emit(opcode
, reg_undef
, payload
);
2183 /* We need to increment Global Offset by 256-bits to make room for
2184 * Broadwell's extra "Vertex Count" payload at the beginning of the
2185 * URB entry. Since this is an OWord message, Global Offset is counted
2186 * in 128-bit units, so we must set it to 2.
2188 if (gs_prog_data
->static_vertex_count
== -1)
2193 fs_visitor::set_gs_stream_control_data_bits(const fs_reg
&vertex_count
,
2196 /* control_data_bits |= stream_id << ((2 * (vertex_count - 1)) % 32) */
2198 /* Note: we are calling this *before* increasing vertex_count, so
2199 * this->vertex_count == vertex_count - 1 in the formula above.
2202 /* Stream mode uses 2 bits per vertex */
2203 assert(gs_compile
->control_data_bits_per_vertex
== 2);
2205 /* Must be a valid stream */
2206 assert(stream_id
< MAX_VERTEX_STREAMS
);
2208 /* Control data bits are initialized to 0 so we don't have to set any
2209 * bits when sending vertices to stream 0.
2214 const fs_builder abld
= bld
.annotate("set stream control data bits", NULL
);
2216 /* reg::sid = stream_id */
2217 fs_reg sid
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2218 abld
.MOV(sid
, brw_imm_ud(stream_id
));
2220 /* reg:shift_count = 2 * (vertex_count - 1) */
2221 fs_reg shift_count
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2222 abld
.SHL(shift_count
, vertex_count
, brw_imm_ud(1u));
2224 /* Note: we're relying on the fact that the GEN SHL instruction only pays
2225 * attention to the lower 5 bits of its second source argument, so on this
2226 * architecture, stream_id << 2 * (vertex_count - 1) is equivalent to
2227 * stream_id << ((2 * (vertex_count - 1)) % 32).
2229 fs_reg mask
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2230 abld
.SHL(mask
, sid
, shift_count
);
2231 abld
.OR(this->control_data_bits
, this->control_data_bits
, mask
);
2235 fs_visitor::emit_gs_vertex(const nir_src
&vertex_count_nir_src
,
2238 assert(stage
== MESA_SHADER_GEOMETRY
);
2240 struct brw_gs_prog_data
*gs_prog_data
= brw_gs_prog_data(prog_data
);
2242 fs_reg vertex_count
= get_nir_src(vertex_count_nir_src
);
2243 vertex_count
.type
= BRW_REGISTER_TYPE_UD
;
2245 /* Haswell and later hardware ignores the "Render Stream Select" bits
2246 * from the 3DSTATE_STREAMOUT packet when the SOL stage is disabled,
2247 * and instead sends all primitives down the pipeline for rasterization.
2248 * If the SOL stage is enabled, "Render Stream Select" is honored and
2249 * primitives bound to non-zero streams are discarded after stream output.
2251 * Since the only purpose of primives sent to non-zero streams is to
2252 * be recorded by transform feedback, we can simply discard all geometry
2253 * bound to these streams when transform feedback is disabled.
2255 if (stream_id
> 0 && !nir
->info
.has_transform_feedback_varyings
)
2258 /* If we're outputting 32 control data bits or less, then we can wait
2259 * until the shader is over to output them all. Otherwise we need to
2260 * output them as we go. Now is the time to do it, since we're about to
2261 * output the vertex_count'th vertex, so it's guaranteed that the
2262 * control data bits associated with the (vertex_count - 1)th vertex are
2265 if (gs_compile
->control_data_header_size_bits
> 32) {
2266 const fs_builder abld
=
2267 bld
.annotate("emit vertex: emit control data bits");
2269 /* Only emit control data bits if we've finished accumulating a batch
2270 * of 32 bits. This is the case when:
2272 * (vertex_count * bits_per_vertex) % 32 == 0
2274 * (in other words, when the last 5 bits of vertex_count *
2275 * bits_per_vertex are 0). Assuming bits_per_vertex == 2^n for some
2276 * integer n (which is always the case, since bits_per_vertex is
2277 * always 1 or 2), this is equivalent to requiring that the last 5-n
2278 * bits of vertex_count are 0:
2280 * vertex_count & (2^(5-n) - 1) == 0
2282 * 2^(5-n) == 2^5 / 2^n == 32 / bits_per_vertex, so this is
2285 * vertex_count & (32 / bits_per_vertex - 1) == 0
2287 * TODO: If vertex_count is an immediate, we could do some of this math
2288 * at compile time...
2291 abld
.AND(bld
.null_reg_d(), vertex_count
,
2292 brw_imm_ud(32u / gs_compile
->control_data_bits_per_vertex
- 1u));
2293 inst
->conditional_mod
= BRW_CONDITIONAL_Z
;
2295 abld
.IF(BRW_PREDICATE_NORMAL
);
2296 /* If vertex_count is 0, then no control data bits have been
2297 * accumulated yet, so we can skip emitting them.
2299 abld
.CMP(bld
.null_reg_d(), vertex_count
, brw_imm_ud(0u),
2300 BRW_CONDITIONAL_NEQ
);
2301 abld
.IF(BRW_PREDICATE_NORMAL
);
2302 emit_gs_control_data_bits(vertex_count
);
2303 abld
.emit(BRW_OPCODE_ENDIF
);
2305 /* Reset control_data_bits to 0 so we can start accumulating a new
2308 * Note: in the case where vertex_count == 0, this neutralizes the
2309 * effect of any call to EndPrimitive() that the shader may have
2310 * made before outputting its first vertex.
2312 inst
= abld
.MOV(this->control_data_bits
, brw_imm_ud(0u));
2313 inst
->force_writemask_all
= true;
2314 abld
.emit(BRW_OPCODE_ENDIF
);
2317 emit_urb_writes(vertex_count
);
2319 /* In stream mode we have to set control data bits for all vertices
2320 * unless we have disabled control data bits completely (which we do
2321 * do for GL_POINTS outputs that don't use streams).
2323 if (gs_compile
->control_data_header_size_bits
> 0 &&
2324 gs_prog_data
->control_data_format
==
2325 GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_SID
) {
2326 set_gs_stream_control_data_bits(vertex_count
, stream_id
);
2331 fs_visitor::emit_gs_input_load(const fs_reg
&dst
,
2332 const nir_src
&vertex_src
,
2333 unsigned base_offset
,
2334 const nir_src
&offset_src
,
2335 unsigned num_components
,
2336 unsigned first_component
)
2338 struct brw_gs_prog_data
*gs_prog_data
= brw_gs_prog_data(prog_data
);
2339 const unsigned push_reg_count
= gs_prog_data
->base
.urb_read_length
* 8;
2341 /* TODO: figure out push input layout for invocations == 1 */
2342 /* TODO: make this work with 64-bit inputs */
2343 if (gs_prog_data
->invocations
== 1 &&
2344 type_sz(dst
.type
) <= 4 &&
2345 nir_src_is_const(offset_src
) && nir_src_is_const(vertex_src
) &&
2346 4 * (base_offset
+ nir_src_as_uint(offset_src
)) < push_reg_count
) {
2347 int imm_offset
= (base_offset
+ nir_src_as_uint(offset_src
)) * 4 +
2348 nir_src_as_uint(vertex_src
) * push_reg_count
;
2349 for (unsigned i
= 0; i
< num_components
; i
++) {
2350 bld
.MOV(offset(dst
, bld
, i
),
2351 fs_reg(ATTR
, imm_offset
+ i
+ first_component
, dst
.type
));
2356 /* Resort to the pull model. Ensure the VUE handles are provided. */
2357 assert(gs_prog_data
->base
.include_vue_handles
);
2359 unsigned first_icp_handle
= gs_prog_data
->include_primitive_id
? 3 : 2;
2360 fs_reg icp_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2362 if (gs_prog_data
->invocations
== 1) {
2363 if (nir_src_is_const(vertex_src
)) {
2364 /* The vertex index is constant; just select the proper URB handle. */
2366 retype(brw_vec8_grf(first_icp_handle
+ nir_src_as_uint(vertex_src
), 0),
2367 BRW_REGISTER_TYPE_UD
);
2369 /* The vertex index is non-constant. We need to use indirect
2370 * addressing to fetch the proper URB handle.
2372 * First, we start with the sequence <7, 6, 5, 4, 3, 2, 1, 0>
2373 * indicating that channel <n> should read the handle from
2374 * DWord <n>. We convert that to bytes by multiplying by 4.
2376 * Next, we convert the vertex index to bytes by multiplying
2377 * by 32 (shifting by 5), and add the two together. This is
2378 * the final indirect byte offset.
2380 fs_reg sequence
= bld
.vgrf(BRW_REGISTER_TYPE_UW
, 1);
2381 fs_reg channel_offsets
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2382 fs_reg vertex_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2383 fs_reg icp_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2385 /* sequence = <7, 6, 5, 4, 3, 2, 1, 0> */
2386 bld
.MOV(sequence
, fs_reg(brw_imm_v(0x76543210)));
2387 /* channel_offsets = 4 * sequence = <28, 24, 20, 16, 12, 8, 4, 0> */
2388 bld
.SHL(channel_offsets
, sequence
, brw_imm_ud(2u));
2389 /* Convert vertex_index to bytes (multiply by 32) */
2390 bld
.SHL(vertex_offset_bytes
,
2391 retype(get_nir_src(vertex_src
), BRW_REGISTER_TYPE_UD
),
2393 bld
.ADD(icp_offset_bytes
, vertex_offset_bytes
, channel_offsets
);
2395 /* Use first_icp_handle as the base offset. There is one register
2396 * of URB handles per vertex, so inform the register allocator that
2397 * we might read up to nir->info.gs.vertices_in registers.
2399 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
, icp_handle
,
2400 retype(brw_vec8_grf(first_icp_handle
, 0), icp_handle
.type
),
2401 fs_reg(icp_offset_bytes
),
2402 brw_imm_ud(nir
->info
.gs
.vertices_in
* REG_SIZE
));
2405 assert(gs_prog_data
->invocations
> 1);
2407 if (nir_src_is_const(vertex_src
)) {
2408 unsigned vertex
= nir_src_as_uint(vertex_src
);
2409 assert(devinfo
->gen
>= 9 || vertex
<= 5);
2411 retype(brw_vec1_grf(first_icp_handle
+ vertex
/ 8, vertex
% 8),
2412 BRW_REGISTER_TYPE_UD
));
2414 /* The vertex index is non-constant. We need to use indirect
2415 * addressing to fetch the proper URB handle.
2418 fs_reg icp_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2420 /* Convert vertex_index to bytes (multiply by 4) */
2421 bld
.SHL(icp_offset_bytes
,
2422 retype(get_nir_src(vertex_src
), BRW_REGISTER_TYPE_UD
),
2425 /* Use first_icp_handle as the base offset. There is one DWord
2426 * of URB handles per vertex, so inform the register allocator that
2427 * we might read up to ceil(nir->info.gs.vertices_in / 8) registers.
2429 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
, icp_handle
,
2430 retype(brw_vec8_grf(first_icp_handle
, 0), icp_handle
.type
),
2431 fs_reg(icp_offset_bytes
),
2432 brw_imm_ud(DIV_ROUND_UP(nir
->info
.gs
.vertices_in
, 8) *
2439 fs_reg tmp_dst
= dst
;
2440 fs_reg indirect_offset
= get_nir_src(offset_src
);
2441 unsigned num_iterations
= 1;
2442 unsigned orig_num_components
= num_components
;
2444 if (type_sz(dst
.type
) == 8) {
2445 if (num_components
> 2) {
2449 fs_reg tmp
= fs_reg(VGRF
, alloc
.allocate(4), dst
.type
);
2451 first_component
= first_component
/ 2;
2454 for (unsigned iter
= 0; iter
< num_iterations
; iter
++) {
2455 if (nir_src_is_const(offset_src
)) {
2456 /* Constant indexing - use global offset. */
2457 if (first_component
!= 0) {
2458 unsigned read_components
= num_components
+ first_component
;
2459 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2460 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, tmp
, icp_handle
);
2461 inst
->size_written
= read_components
*
2462 tmp
.component_size(inst
->exec_size
);
2463 for (unsigned i
= 0; i
< num_components
; i
++) {
2464 bld
.MOV(offset(tmp_dst
, bld
, i
),
2465 offset(tmp
, bld
, i
+ first_component
));
2468 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, tmp_dst
,
2470 inst
->size_written
= num_components
*
2471 tmp_dst
.component_size(inst
->exec_size
);
2473 inst
->offset
= base_offset
+ nir_src_as_uint(offset_src
);
2476 /* Indirect indexing - use per-slot offsets as well. */
2477 const fs_reg srcs
[] = { icp_handle
, indirect_offset
};
2478 unsigned read_components
= num_components
+ first_component
;
2479 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2480 fs_reg payload
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
2481 bld
.LOAD_PAYLOAD(payload
, srcs
, ARRAY_SIZE(srcs
), 0);
2482 if (first_component
!= 0) {
2483 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, tmp
,
2485 inst
->size_written
= read_components
*
2486 tmp
.component_size(inst
->exec_size
);
2487 for (unsigned i
= 0; i
< num_components
; i
++) {
2488 bld
.MOV(offset(tmp_dst
, bld
, i
),
2489 offset(tmp
, bld
, i
+ first_component
));
2492 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, tmp_dst
,
2494 inst
->size_written
= num_components
*
2495 tmp_dst
.component_size(inst
->exec_size
);
2497 inst
->offset
= base_offset
;
2501 if (type_sz(dst
.type
) == 8) {
2502 shuffle_from_32bit_read(bld
,
2503 offset(dst
, bld
, iter
* 2),
2504 retype(tmp_dst
, BRW_REGISTER_TYPE_D
),
2509 if (num_iterations
> 1) {
2510 num_components
= orig_num_components
- 2;
2511 if(nir_src_is_const(offset_src
)) {
2514 fs_reg new_indirect
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2515 bld
.ADD(new_indirect
, indirect_offset
, brw_imm_ud(1u));
2516 indirect_offset
= new_indirect
;
2523 fs_visitor::get_indirect_offset(nir_intrinsic_instr
*instr
)
2525 nir_src
*offset_src
= nir_get_io_offset_src(instr
);
2527 if (nir_src_is_const(*offset_src
)) {
2528 /* The only constant offset we should find is 0. brw_nir.c's
2529 * add_const_offset_to_base() will fold other constant offsets
2530 * into instr->const_index[0].
2532 assert(nir_src_as_uint(*offset_src
) == 0);
2536 return get_nir_src(*offset_src
);
2540 fs_visitor::nir_emit_vs_intrinsic(const fs_builder
&bld
,
2541 nir_intrinsic_instr
*instr
)
2543 assert(stage
== MESA_SHADER_VERTEX
);
2546 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
2547 dest
= get_nir_dest(instr
->dest
);
2549 switch (instr
->intrinsic
) {
2550 case nir_intrinsic_load_vertex_id
:
2551 case nir_intrinsic_load_base_vertex
:
2552 unreachable("should be lowered by nir_lower_system_values()");
2554 case nir_intrinsic_load_input
: {
2555 fs_reg src
= fs_reg(ATTR
, nir_intrinsic_base(instr
) * 4, dest
.type
);
2556 unsigned first_component
= nir_intrinsic_component(instr
);
2557 unsigned num_components
= instr
->num_components
;
2559 src
= offset(src
, bld
, nir_src_as_uint(instr
->src
[0]));
2561 if (type_sz(dest
.type
) == 8)
2562 first_component
/= 2;
2564 /* For 16-bit support maybe a temporary will be needed to copy from
2567 shuffle_from_32bit_read(bld
, dest
, retype(src
, BRW_REGISTER_TYPE_D
),
2568 first_component
, num_components
);
2572 case nir_intrinsic_load_vertex_id_zero_base
:
2573 case nir_intrinsic_load_instance_id
:
2574 case nir_intrinsic_load_base_instance
:
2575 case nir_intrinsic_load_draw_id
:
2576 case nir_intrinsic_load_first_vertex
:
2577 case nir_intrinsic_load_is_indexed_draw
:
2578 unreachable("lowered by brw_nir_lower_vs_inputs");
2581 nir_emit_intrinsic(bld
, instr
);
2587 fs_visitor::get_tcs_single_patch_icp_handle(const fs_builder
&bld
,
2588 nir_intrinsic_instr
*instr
)
2590 struct brw_tcs_prog_data
*tcs_prog_data
= brw_tcs_prog_data(prog_data
);
2591 const nir_src
&vertex_src
= instr
->src
[0];
2592 nir_intrinsic_instr
*vertex_intrin
= nir_src_as_intrinsic(vertex_src
);
2595 if (nir_src_is_const(vertex_src
)) {
2596 /* Emit a MOV to resolve <0,1,0> regioning. */
2597 icp_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2598 unsigned vertex
= nir_src_as_uint(vertex_src
);
2600 retype(brw_vec1_grf(1 + (vertex
>> 3), vertex
& 7),
2601 BRW_REGISTER_TYPE_UD
));
2602 } else if (tcs_prog_data
->instances
== 1 && vertex_intrin
&&
2603 vertex_intrin
->intrinsic
== nir_intrinsic_load_invocation_id
) {
2604 /* For the common case of only 1 instance, an array index of
2605 * gl_InvocationID means reading g1. Skip all the indirect work.
2607 icp_handle
= retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD
);
2609 /* The vertex index is non-constant. We need to use indirect
2610 * addressing to fetch the proper URB handle.
2612 icp_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2614 /* Each ICP handle is a single DWord (4 bytes) */
2615 fs_reg vertex_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2616 bld
.SHL(vertex_offset_bytes
,
2617 retype(get_nir_src(vertex_src
), BRW_REGISTER_TYPE_UD
),
2620 /* Start at g1. We might read up to 4 registers. */
2621 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
, icp_handle
,
2622 retype(brw_vec8_grf(1, 0), icp_handle
.type
), vertex_offset_bytes
,
2623 brw_imm_ud(4 * REG_SIZE
));
2630 fs_visitor::get_tcs_eight_patch_icp_handle(const fs_builder
&bld
,
2631 nir_intrinsic_instr
*instr
)
2633 struct brw_tcs_prog_key
*tcs_key
= (struct brw_tcs_prog_key
*) key
;
2634 struct brw_tcs_prog_data
*tcs_prog_data
= brw_tcs_prog_data(prog_data
);
2635 const nir_src
&vertex_src
= instr
->src
[0];
2637 unsigned first_icp_handle
= tcs_prog_data
->include_primitive_id
? 3 : 2;
2639 if (nir_src_is_const(vertex_src
)) {
2640 return fs_reg(retype(brw_vec8_grf(first_icp_handle
+
2641 nir_src_as_uint(vertex_src
), 0),
2642 BRW_REGISTER_TYPE_UD
));
2645 /* The vertex index is non-constant. We need to use indirect
2646 * addressing to fetch the proper URB handle.
2648 * First, we start with the sequence <7, 6, 5, 4, 3, 2, 1, 0>
2649 * indicating that channel <n> should read the handle from
2650 * DWord <n>. We convert that to bytes by multiplying by 4.
2652 * Next, we convert the vertex index to bytes by multiplying
2653 * by 32 (shifting by 5), and add the two together. This is
2654 * the final indirect byte offset.
2656 fs_reg icp_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2657 fs_reg sequence
= bld
.vgrf(BRW_REGISTER_TYPE_UW
, 1);
2658 fs_reg channel_offsets
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2659 fs_reg vertex_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2660 fs_reg icp_offset_bytes
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2662 /* sequence = <7, 6, 5, 4, 3, 2, 1, 0> */
2663 bld
.MOV(sequence
, fs_reg(brw_imm_v(0x76543210)));
2664 /* channel_offsets = 4 * sequence = <28, 24, 20, 16, 12, 8, 4, 0> */
2665 bld
.SHL(channel_offsets
, sequence
, brw_imm_ud(2u));
2666 /* Convert vertex_index to bytes (multiply by 32) */
2667 bld
.SHL(vertex_offset_bytes
,
2668 retype(get_nir_src(vertex_src
), BRW_REGISTER_TYPE_UD
),
2670 bld
.ADD(icp_offset_bytes
, vertex_offset_bytes
, channel_offsets
);
2672 /* Use first_icp_handle as the base offset. There is one register
2673 * of URB handles per vertex, so inform the register allocator that
2674 * we might read up to nir->info.gs.vertices_in registers.
2676 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
, icp_handle
,
2677 retype(brw_vec8_grf(first_icp_handle
, 0), icp_handle
.type
),
2678 icp_offset_bytes
, brw_imm_ud(tcs_key
->input_vertices
* REG_SIZE
));
2684 fs_visitor::get_tcs_output_urb_handle()
2686 struct brw_vue_prog_data
*vue_prog_data
= brw_vue_prog_data(prog_data
);
2688 if (vue_prog_data
->dispatch_mode
== DISPATCH_MODE_TCS_SINGLE_PATCH
) {
2689 return retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD
);
2691 assert(vue_prog_data
->dispatch_mode
== DISPATCH_MODE_TCS_8_PATCH
);
2692 return retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD
);
2697 fs_visitor::nir_emit_tcs_intrinsic(const fs_builder
&bld
,
2698 nir_intrinsic_instr
*instr
)
2700 assert(stage
== MESA_SHADER_TESS_CTRL
);
2701 struct brw_tcs_prog_key
*tcs_key
= (struct brw_tcs_prog_key
*) key
;
2702 struct brw_tcs_prog_data
*tcs_prog_data
= brw_tcs_prog_data(prog_data
);
2703 struct brw_vue_prog_data
*vue_prog_data
= &tcs_prog_data
->base
;
2706 vue_prog_data
->dispatch_mode
== DISPATCH_MODE_TCS_8_PATCH
;
2709 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
2710 dst
= get_nir_dest(instr
->dest
);
2712 switch (instr
->intrinsic
) {
2713 case nir_intrinsic_load_primitive_id
:
2714 bld
.MOV(dst
, fs_reg(eight_patch
? brw_vec8_grf(2, 0)
2715 : brw_vec1_grf(0, 1)));
2717 case nir_intrinsic_load_invocation_id
:
2718 bld
.MOV(retype(dst
, invocation_id
.type
), invocation_id
);
2720 case nir_intrinsic_load_patch_vertices_in
:
2721 bld
.MOV(retype(dst
, BRW_REGISTER_TYPE_D
),
2722 brw_imm_d(tcs_key
->input_vertices
));
2725 case nir_intrinsic_barrier
: {
2726 if (tcs_prog_data
->instances
== 1)
2729 fs_reg m0
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2730 fs_reg m0_2
= component(m0
, 2);
2732 const fs_builder chanbld
= bld
.exec_all().group(1, 0);
2734 /* Zero the message header */
2735 bld
.exec_all().MOV(m0
, brw_imm_ud(0u));
2737 if (devinfo
->gen
< 11) {
2738 /* Copy "Barrier ID" from r0.2, bits 16:13 */
2739 chanbld
.AND(m0_2
, retype(brw_vec1_grf(0, 2), BRW_REGISTER_TYPE_UD
),
2740 brw_imm_ud(INTEL_MASK(16, 13)));
2742 /* Shift it up to bits 27:24. */
2743 chanbld
.SHL(m0_2
, m0_2
, brw_imm_ud(11));
2745 chanbld
.AND(m0_2
, retype(brw_vec1_grf(0, 2), BRW_REGISTER_TYPE_UD
),
2746 brw_imm_ud(INTEL_MASK(30, 24)));
2749 /* Set the Barrier Count and the enable bit */
2750 if (devinfo
->gen
< 11) {
2751 chanbld
.OR(m0_2
, m0_2
,
2752 brw_imm_ud(tcs_prog_data
->instances
<< 9 | (1 << 15)));
2754 chanbld
.OR(m0_2
, m0_2
,
2755 brw_imm_ud(tcs_prog_data
->instances
<< 8 | (1 << 15)));
2758 bld
.emit(SHADER_OPCODE_BARRIER
, bld
.null_reg_ud(), m0
);
2762 case nir_intrinsic_load_input
:
2763 unreachable("nir_lower_io should never give us these.");
2766 case nir_intrinsic_load_per_vertex_input
: {
2767 fs_reg indirect_offset
= get_indirect_offset(instr
);
2768 unsigned imm_offset
= instr
->const_index
[0];
2772 eight_patch
? get_tcs_eight_patch_icp_handle(bld
, instr
)
2773 : get_tcs_single_patch_icp_handle(bld
, instr
);
2775 /* We can only read two double components with each URB read, so
2776 * we send two read messages in that case, each one loading up to
2777 * two double components.
2779 unsigned num_iterations
= 1;
2780 unsigned num_components
= instr
->num_components
;
2781 unsigned first_component
= nir_intrinsic_component(instr
);
2782 fs_reg orig_dst
= dst
;
2783 if (type_sz(dst
.type
) == 8) {
2784 first_component
= first_component
/ 2;
2785 if (instr
->num_components
> 2) {
2790 fs_reg tmp
= fs_reg(VGRF
, alloc
.allocate(4), dst
.type
);
2794 for (unsigned iter
= 0; iter
< num_iterations
; iter
++) {
2795 if (indirect_offset
.file
== BAD_FILE
) {
2796 /* Constant indexing - use global offset. */
2797 if (first_component
!= 0) {
2798 unsigned read_components
= num_components
+ first_component
;
2799 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2800 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, tmp
, icp_handle
);
2801 for (unsigned i
= 0; i
< num_components
; i
++) {
2802 bld
.MOV(offset(dst
, bld
, i
),
2803 offset(tmp
, bld
, i
+ first_component
));
2806 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, dst
, icp_handle
);
2808 inst
->offset
= imm_offset
;
2811 /* Indirect indexing - use per-slot offsets as well. */
2812 const fs_reg srcs
[] = { icp_handle
, indirect_offset
};
2813 fs_reg payload
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
2814 bld
.LOAD_PAYLOAD(payload
, srcs
, ARRAY_SIZE(srcs
), 0);
2815 if (first_component
!= 0) {
2816 unsigned read_components
= num_components
+ first_component
;
2817 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2818 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, tmp
,
2820 for (unsigned i
= 0; i
< num_components
; i
++) {
2821 bld
.MOV(offset(dst
, bld
, i
),
2822 offset(tmp
, bld
, i
+ first_component
));
2825 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, dst
,
2828 inst
->offset
= imm_offset
;
2831 inst
->size_written
= (num_components
+ first_component
) *
2832 inst
->dst
.component_size(inst
->exec_size
);
2834 /* If we are reading 64-bit data using 32-bit read messages we need
2835 * build proper 64-bit data elements by shuffling the low and high
2836 * 32-bit components around like we do for other things like UBOs
2839 if (type_sz(dst
.type
) == 8) {
2840 shuffle_from_32bit_read(bld
,
2841 offset(orig_dst
, bld
, iter
* 2),
2842 retype(dst
, BRW_REGISTER_TYPE_D
),
2846 /* Copy the temporary to the destination to deal with writemasking.
2848 * Also attempt to deal with gl_PointSize being in the .w component.
2850 if (inst
->offset
== 0 && indirect_offset
.file
== BAD_FILE
) {
2851 assert(type_sz(dst
.type
) < 8);
2852 inst
->dst
= bld
.vgrf(dst
.type
, 4);
2853 inst
->size_written
= 4 * REG_SIZE
;
2854 bld
.MOV(dst
, offset(inst
->dst
, bld
, 3));
2857 /* If we are loading double data and we need a second read message
2858 * adjust the write offset
2860 if (num_iterations
> 1) {
2861 num_components
= instr
->num_components
- 2;
2868 case nir_intrinsic_load_output
:
2869 case nir_intrinsic_load_per_vertex_output
: {
2870 fs_reg indirect_offset
= get_indirect_offset(instr
);
2871 unsigned imm_offset
= instr
->const_index
[0];
2872 unsigned first_component
= nir_intrinsic_component(instr
);
2874 struct brw_reg output_handles
= get_tcs_output_urb_handle();
2877 if (indirect_offset
.file
== BAD_FILE
) {
2878 /* This MOV replicates the output handle to all enabled channels
2879 * is SINGLE_PATCH mode.
2881 fs_reg patch_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
2882 bld
.MOV(patch_handle
, output_handles
);
2885 if (first_component
!= 0) {
2886 unsigned read_components
=
2887 instr
->num_components
+ first_component
;
2888 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2889 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, tmp
,
2891 inst
->size_written
= read_components
* REG_SIZE
;
2892 for (unsigned i
= 0; i
< instr
->num_components
; i
++) {
2893 bld
.MOV(offset(dst
, bld
, i
),
2894 offset(tmp
, bld
, i
+ first_component
));
2897 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, dst
,
2899 inst
->size_written
= instr
->num_components
* REG_SIZE
;
2901 inst
->offset
= imm_offset
;
2905 /* Indirect indexing - use per-slot offsets as well. */
2906 const fs_reg srcs
[] = { output_handles
, indirect_offset
};
2907 fs_reg payload
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
2908 bld
.LOAD_PAYLOAD(payload
, srcs
, ARRAY_SIZE(srcs
), 0);
2909 if (first_component
!= 0) {
2910 unsigned read_components
=
2911 instr
->num_components
+ first_component
;
2912 fs_reg tmp
= bld
.vgrf(dst
.type
, read_components
);
2913 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, tmp
,
2915 inst
->size_written
= read_components
* REG_SIZE
;
2916 for (unsigned i
= 0; i
< instr
->num_components
; i
++) {
2917 bld
.MOV(offset(dst
, bld
, i
),
2918 offset(tmp
, bld
, i
+ first_component
));
2921 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, dst
,
2923 inst
->size_written
= instr
->num_components
* REG_SIZE
;
2925 inst
->offset
= imm_offset
;
2931 case nir_intrinsic_store_output
:
2932 case nir_intrinsic_store_per_vertex_output
: {
2933 fs_reg value
= get_nir_src(instr
->src
[0]);
2934 bool is_64bit
= (instr
->src
[0].is_ssa
?
2935 instr
->src
[0].ssa
->bit_size
: instr
->src
[0].reg
.reg
->bit_size
) == 64;
2936 fs_reg indirect_offset
= get_indirect_offset(instr
);
2937 unsigned imm_offset
= instr
->const_index
[0];
2938 unsigned mask
= instr
->const_index
[1];
2939 unsigned header_regs
= 0;
2940 struct brw_reg output_handles
= get_tcs_output_urb_handle();
2943 srcs
[header_regs
++] = output_handles
;
2945 if (indirect_offset
.file
!= BAD_FILE
) {
2946 srcs
[header_regs
++] = indirect_offset
;
2952 unsigned num_components
= util_last_bit(mask
);
2955 /* We can only pack two 64-bit components in a single message, so send
2956 * 2 messages if we have more components
2958 unsigned num_iterations
= 1;
2959 unsigned iter_components
= num_components
;
2960 unsigned first_component
= nir_intrinsic_component(instr
);
2962 first_component
= first_component
/ 2;
2963 if (instr
->num_components
> 2) {
2965 iter_components
= 2;
2969 mask
= mask
<< first_component
;
2971 for (unsigned iter
= 0; iter
< num_iterations
; iter
++) {
2972 if (!is_64bit
&& mask
!= WRITEMASK_XYZW
) {
2973 srcs
[header_regs
++] = brw_imm_ud(mask
<< 16);
2974 opcode
= indirect_offset
.file
!= BAD_FILE
?
2975 SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT
:
2976 SHADER_OPCODE_URB_WRITE_SIMD8_MASKED
;
2977 } else if (is_64bit
&& ((mask
& WRITEMASK_XY
) != WRITEMASK_XY
)) {
2978 /* Expand the 64-bit mask to 32-bit channels. We only handle
2979 * two channels in each iteration, so we only care about X/Y.
2981 unsigned mask32
= 0;
2982 if (mask
& WRITEMASK_X
)
2983 mask32
|= WRITEMASK_XY
;
2984 if (mask
& WRITEMASK_Y
)
2985 mask32
|= WRITEMASK_ZW
;
2987 /* If the mask does not include any of the channels X or Y there
2988 * is nothing to do in this iteration. Move on to the next couple
2989 * of 64-bit channels.
2997 srcs
[header_regs
++] = brw_imm_ud(mask32
<< 16);
2998 opcode
= indirect_offset
.file
!= BAD_FILE
?
2999 SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT
:
3000 SHADER_OPCODE_URB_WRITE_SIMD8_MASKED
;
3002 opcode
= indirect_offset
.file
!= BAD_FILE
?
3003 SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT
:
3004 SHADER_OPCODE_URB_WRITE_SIMD8
;
3007 for (unsigned i
= 0; i
< iter_components
; i
++) {
3008 if (!(mask
& (1 << (i
+ first_component
))))
3012 srcs
[header_regs
+ i
+ first_component
] = offset(value
, bld
, i
);
3014 /* We need to shuffle the 64-bit data to match the layout
3015 * expected by our 32-bit URB write messages. We use a temporary
3018 unsigned channel
= iter
* 2 + i
;
3019 fs_reg dest
= shuffle_for_32bit_write(bld
, value
, channel
, 1);
3021 srcs
[header_regs
+ (i
+ first_component
) * 2] = dest
;
3022 srcs
[header_regs
+ (i
+ first_component
) * 2 + 1] =
3023 offset(dest
, bld
, 1);
3028 header_regs
+ (is_64bit
? 2 * iter_components
: iter_components
) +
3029 (is_64bit
? 2 * first_component
: first_component
);
3031 bld
.vgrf(BRW_REGISTER_TYPE_UD
, mlen
);
3032 bld
.LOAD_PAYLOAD(payload
, srcs
, mlen
, header_regs
);
3034 fs_inst
*inst
= bld
.emit(opcode
, bld
.null_reg_ud(), payload
);
3035 inst
->offset
= imm_offset
;
3038 /* If this is a 64-bit attribute, select the next two 64-bit channels
3039 * to be handled in the next iteration.
3050 nir_emit_intrinsic(bld
, instr
);
3056 fs_visitor::nir_emit_tes_intrinsic(const fs_builder
&bld
,
3057 nir_intrinsic_instr
*instr
)
3059 assert(stage
== MESA_SHADER_TESS_EVAL
);
3060 struct brw_tes_prog_data
*tes_prog_data
= brw_tes_prog_data(prog_data
);
3063 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
3064 dest
= get_nir_dest(instr
->dest
);
3066 switch (instr
->intrinsic
) {
3067 case nir_intrinsic_load_primitive_id
:
3068 bld
.MOV(dest
, fs_reg(brw_vec1_grf(0, 1)));
3070 case nir_intrinsic_load_tess_coord
:
3071 /* gl_TessCoord is part of the payload in g1-3 */
3072 for (unsigned i
= 0; i
< 3; i
++) {
3073 bld
.MOV(offset(dest
, bld
, i
), fs_reg(brw_vec8_grf(1 + i
, 0)));
3077 case nir_intrinsic_load_input
:
3078 case nir_intrinsic_load_per_vertex_input
: {
3079 fs_reg indirect_offset
= get_indirect_offset(instr
);
3080 unsigned imm_offset
= instr
->const_index
[0];
3081 unsigned first_component
= nir_intrinsic_component(instr
);
3083 if (type_sz(dest
.type
) == 8) {
3084 first_component
= first_component
/ 2;
3088 if (indirect_offset
.file
== BAD_FILE
) {
3089 /* Arbitrarily only push up to 32 vec4 slots worth of data,
3090 * which is 16 registers (since each holds 2 vec4 slots).
3092 unsigned slot_count
= 1;
3093 if (type_sz(dest
.type
) == 8 && instr
->num_components
> 2)
3096 const unsigned max_push_slots
= 32;
3097 if (imm_offset
+ slot_count
<= max_push_slots
) {
3098 fs_reg src
= fs_reg(ATTR
, imm_offset
/ 2, dest
.type
);
3099 for (int i
= 0; i
< instr
->num_components
; i
++) {
3100 unsigned comp
= 16 / type_sz(dest
.type
) * (imm_offset
% 2) +
3101 i
+ first_component
;
3102 bld
.MOV(offset(dest
, bld
, i
), component(src
, comp
));
3105 tes_prog_data
->base
.urb_read_length
=
3106 MAX2(tes_prog_data
->base
.urb_read_length
,
3107 DIV_ROUND_UP(imm_offset
+ slot_count
, 2));
3109 /* Replicate the patch handle to all enabled channels */
3110 const fs_reg srcs
[] = {
3111 retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD
)
3113 fs_reg patch_handle
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 1);
3114 bld
.LOAD_PAYLOAD(patch_handle
, srcs
, ARRAY_SIZE(srcs
), 0);
3116 if (first_component
!= 0) {
3117 unsigned read_components
=
3118 instr
->num_components
+ first_component
;
3119 fs_reg tmp
= bld
.vgrf(dest
.type
, read_components
);
3120 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, tmp
,
3122 inst
->size_written
= read_components
* REG_SIZE
;
3123 for (unsigned i
= 0; i
< instr
->num_components
; i
++) {
3124 bld
.MOV(offset(dest
, bld
, i
),
3125 offset(tmp
, bld
, i
+ first_component
));
3128 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8
, dest
,
3130 inst
->size_written
= instr
->num_components
* REG_SIZE
;
3133 inst
->offset
= imm_offset
;
3136 /* Indirect indexing - use per-slot offsets as well. */
3138 /* We can only read two double components with each URB read, so
3139 * we send two read messages in that case, each one loading up to
3140 * two double components.
3142 unsigned num_iterations
= 1;
3143 unsigned num_components
= instr
->num_components
;
3144 fs_reg orig_dest
= dest
;
3145 if (type_sz(dest
.type
) == 8) {
3146 if (instr
->num_components
> 2) {
3150 fs_reg tmp
= fs_reg(VGRF
, alloc
.allocate(4), dest
.type
);
3154 for (unsigned iter
= 0; iter
< num_iterations
; iter
++) {
3155 const fs_reg srcs
[] = {
3156 retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD
),
3159 fs_reg payload
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
3160 bld
.LOAD_PAYLOAD(payload
, srcs
, ARRAY_SIZE(srcs
), 0);
3162 if (first_component
!= 0) {
3163 unsigned read_components
=
3164 num_components
+ first_component
;
3165 fs_reg tmp
= bld
.vgrf(dest
.type
, read_components
);
3166 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, tmp
,
3168 for (unsigned i
= 0; i
< num_components
; i
++) {
3169 bld
.MOV(offset(dest
, bld
, i
),
3170 offset(tmp
, bld
, i
+ first_component
));
3173 inst
= bld
.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT
, dest
,
3177 inst
->offset
= imm_offset
;
3178 inst
->size_written
= (num_components
+ first_component
) *
3179 inst
->dst
.component_size(inst
->exec_size
);
3181 /* If we are reading 64-bit data using 32-bit read messages we need
3182 * build proper 64-bit data elements by shuffling the low and high
3183 * 32-bit components around like we do for other things like UBOs
3186 if (type_sz(dest
.type
) == 8) {
3187 shuffle_from_32bit_read(bld
,
3188 offset(orig_dest
, bld
, iter
* 2),
3189 retype(dest
, BRW_REGISTER_TYPE_D
),
3193 /* If we are loading double data and we need a second read message
3196 if (num_iterations
> 1) {
3197 num_components
= instr
->num_components
- 2;
3205 nir_emit_intrinsic(bld
, instr
);
3211 fs_visitor::nir_emit_gs_intrinsic(const fs_builder
&bld
,
3212 nir_intrinsic_instr
*instr
)
3214 assert(stage
== MESA_SHADER_GEOMETRY
);
3215 fs_reg indirect_offset
;
3218 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
3219 dest
= get_nir_dest(instr
->dest
);
3221 switch (instr
->intrinsic
) {
3222 case nir_intrinsic_load_primitive_id
:
3223 assert(stage
== MESA_SHADER_GEOMETRY
);
3224 assert(brw_gs_prog_data(prog_data
)->include_primitive_id
);
3225 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_UD
),
3226 retype(fs_reg(brw_vec8_grf(2, 0)), BRW_REGISTER_TYPE_UD
));
3229 case nir_intrinsic_load_input
:
3230 unreachable("load_input intrinsics are invalid for the GS stage");
3232 case nir_intrinsic_load_per_vertex_input
:
3233 emit_gs_input_load(dest
, instr
->src
[0], instr
->const_index
[0],
3234 instr
->src
[1], instr
->num_components
,
3235 nir_intrinsic_component(instr
));
3238 case nir_intrinsic_emit_vertex_with_counter
:
3239 emit_gs_vertex(instr
->src
[0], instr
->const_index
[0]);
3242 case nir_intrinsic_end_primitive_with_counter
:
3243 emit_gs_end_primitive(instr
->src
[0]);
3246 case nir_intrinsic_set_vertex_count
:
3247 bld
.MOV(this->final_gs_vertex_count
, get_nir_src(instr
->src
[0]));
3250 case nir_intrinsic_load_invocation_id
: {
3251 fs_reg val
= nir_system_values
[SYSTEM_VALUE_INVOCATION_ID
];
3252 assert(val
.file
!= BAD_FILE
);
3253 dest
.type
= val
.type
;
3259 nir_emit_intrinsic(bld
, instr
);
3265 * Fetch the current render target layer index.
3268 fetch_render_target_array_index(const fs_builder
&bld
)
3270 if (bld
.shader
->devinfo
->gen
>= 6) {
3271 /* The render target array index is provided in the thread payload as
3272 * bits 26:16 of r0.0.
3274 const fs_reg idx
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
3275 bld
.AND(idx
, brw_uw1_reg(BRW_GENERAL_REGISTER_FILE
, 0, 1),
3279 /* Pre-SNB we only ever render into the first layer of the framebuffer
3280 * since layered rendering is not implemented.
3282 return brw_imm_ud(0);
3287 * Fake non-coherent framebuffer read implemented using TXF to fetch from the
3288 * framebuffer at the current fragment coordinates and sample index.
3291 fs_visitor::emit_non_coherent_fb_read(const fs_builder
&bld
, const fs_reg
&dst
,
3294 const struct gen_device_info
*devinfo
= bld
.shader
->devinfo
;
3296 assert(bld
.shader
->stage
== MESA_SHADER_FRAGMENT
);
3297 const brw_wm_prog_key
*wm_key
=
3298 reinterpret_cast<const brw_wm_prog_key
*>(key
);
3299 assert(!wm_key
->coherent_fb_fetch
);
3300 const struct brw_wm_prog_data
*wm_prog_data
=
3301 brw_wm_prog_data(stage_prog_data
);
3303 /* Calculate the surface index relative to the start of the texture binding
3304 * table block, since that's what the texturing messages expect.
3306 const unsigned surface
= target
+
3307 wm_prog_data
->binding_table
.render_target_read_start
-
3308 wm_prog_data
->base
.binding_table
.texture_start
;
3310 /* Calculate the fragment coordinates. */
3311 const fs_reg coords
= bld
.vgrf(BRW_REGISTER_TYPE_UD
, 3);
3312 bld
.MOV(offset(coords
, bld
, 0), pixel_x
);
3313 bld
.MOV(offset(coords
, bld
, 1), pixel_y
);
3314 bld
.MOV(offset(coords
, bld
, 2), fetch_render_target_array_index(bld
));
3316 /* Calculate the sample index and MCS payload when multisampling. Luckily
3317 * the MCS fetch message behaves deterministically for UMS surfaces, so it
3318 * shouldn't be necessary to recompile based on whether the framebuffer is
3321 if (wm_key
->multisample_fbo
&&
3322 nir_system_values
[SYSTEM_VALUE_SAMPLE_ID
].file
== BAD_FILE
)
3323 nir_system_values
[SYSTEM_VALUE_SAMPLE_ID
] = *emit_sampleid_setup();
3325 const fs_reg sample
= nir_system_values
[SYSTEM_VALUE_SAMPLE_ID
];
3326 const fs_reg mcs
= wm_key
->multisample_fbo
?
3327 emit_mcs_fetch(coords
, 3, brw_imm_ud(surface
), fs_reg()) : fs_reg();
3329 /* Use either a normal or a CMS texel fetch message depending on whether
3330 * the framebuffer is single or multisample. On SKL+ use the wide CMS
3331 * message just in case the framebuffer uses 16x multisampling, it should
3332 * be equivalent to the normal CMS fetch for lower multisampling modes.
3334 const opcode op
= !wm_key
->multisample_fbo
? SHADER_OPCODE_TXF_LOGICAL
:
3335 devinfo
->gen
>= 9 ? SHADER_OPCODE_TXF_CMS_W_LOGICAL
:
3336 SHADER_OPCODE_TXF_CMS_LOGICAL
;
3338 /* Emit the instruction. */
3339 fs_reg srcs
[TEX_LOGICAL_NUM_SRCS
];
3340 srcs
[TEX_LOGICAL_SRC_COORDINATE
] = coords
;
3341 srcs
[TEX_LOGICAL_SRC_LOD
] = brw_imm_ud(0);
3342 srcs
[TEX_LOGICAL_SRC_SAMPLE_INDEX
] = sample
;
3343 srcs
[TEX_LOGICAL_SRC_MCS
] = mcs
;
3344 srcs
[TEX_LOGICAL_SRC_SURFACE
] = brw_imm_ud(surface
);
3345 srcs
[TEX_LOGICAL_SRC_SAMPLER
] = brw_imm_ud(0);
3346 srcs
[TEX_LOGICAL_SRC_COORD_COMPONENTS
] = brw_imm_ud(3);
3347 srcs
[TEX_LOGICAL_SRC_GRAD_COMPONENTS
] = brw_imm_ud(0);
3349 fs_inst
*inst
= bld
.emit(op
, dst
, srcs
, ARRAY_SIZE(srcs
));
3350 inst
->size_written
= 4 * inst
->dst
.component_size(inst
->exec_size
);
3356 * Actual coherent framebuffer read implemented using the native render target
3357 * read message. Requires SKL+.
3360 emit_coherent_fb_read(const fs_builder
&bld
, const fs_reg
&dst
, unsigned target
)
3362 assert(bld
.shader
->devinfo
->gen
>= 9);
3363 fs_inst
*inst
= bld
.emit(FS_OPCODE_FB_READ_LOGICAL
, dst
);
3364 inst
->target
= target
;
3365 inst
->size_written
= 4 * inst
->dst
.component_size(inst
->exec_size
);
3371 alloc_temporary(const fs_builder
&bld
, unsigned size
, fs_reg
*regs
, unsigned n
)
3373 if (n
&& regs
[0].file
!= BAD_FILE
) {
3377 const fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_F
, size
);
3379 for (unsigned i
= 0; i
< n
; i
++)
3387 alloc_frag_output(fs_visitor
*v
, unsigned location
)
3389 assert(v
->stage
== MESA_SHADER_FRAGMENT
);
3390 const brw_wm_prog_key
*const key
=
3391 reinterpret_cast<const brw_wm_prog_key
*>(v
->key
);
3392 const unsigned l
= GET_FIELD(location
, BRW_NIR_FRAG_OUTPUT_LOCATION
);
3393 const unsigned i
= GET_FIELD(location
, BRW_NIR_FRAG_OUTPUT_INDEX
);
3395 if (i
> 0 || (key
->force_dual_color_blend
&& l
== FRAG_RESULT_DATA1
))
3396 return alloc_temporary(v
->bld
, 4, &v
->dual_src_output
, 1);
3398 else if (l
== FRAG_RESULT_COLOR
)
3399 return alloc_temporary(v
->bld
, 4, v
->outputs
,
3400 MAX2(key
->nr_color_regions
, 1));
3402 else if (l
== FRAG_RESULT_DEPTH
)
3403 return alloc_temporary(v
->bld
, 1, &v
->frag_depth
, 1);
3405 else if (l
== FRAG_RESULT_STENCIL
)
3406 return alloc_temporary(v
->bld
, 1, &v
->frag_stencil
, 1);
3408 else if (l
== FRAG_RESULT_SAMPLE_MASK
)
3409 return alloc_temporary(v
->bld
, 1, &v
->sample_mask
, 1);
3411 else if (l
>= FRAG_RESULT_DATA0
&&
3412 l
< FRAG_RESULT_DATA0
+ BRW_MAX_DRAW_BUFFERS
)
3413 return alloc_temporary(v
->bld
, 4,
3414 &v
->outputs
[l
- FRAG_RESULT_DATA0
], 1);
3417 unreachable("Invalid location");
3421 fs_visitor::nir_emit_fs_intrinsic(const fs_builder
&bld
,
3422 nir_intrinsic_instr
*instr
)
3424 assert(stage
== MESA_SHADER_FRAGMENT
);
3427 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
3428 dest
= get_nir_dest(instr
->dest
);
3430 switch (instr
->intrinsic
) {
3431 case nir_intrinsic_load_front_face
:
3432 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
),
3433 *emit_frontfacing_interpolation());
3436 case nir_intrinsic_load_sample_pos
: {
3437 fs_reg sample_pos
= nir_system_values
[SYSTEM_VALUE_SAMPLE_POS
];
3438 assert(sample_pos
.file
!= BAD_FILE
);
3439 dest
.type
= sample_pos
.type
;
3440 bld
.MOV(dest
, sample_pos
);
3441 bld
.MOV(offset(dest
, bld
, 1), offset(sample_pos
, bld
, 1));
3445 case nir_intrinsic_load_layer_id
:
3446 dest
.type
= BRW_REGISTER_TYPE_UD
;
3447 bld
.MOV(dest
, fetch_render_target_array_index(bld
));
3450 case nir_intrinsic_load_helper_invocation
:
3451 case nir_intrinsic_load_sample_mask_in
:
3452 case nir_intrinsic_load_sample_id
: {
3453 gl_system_value sv
= nir_system_value_from_intrinsic(instr
->intrinsic
);
3454 fs_reg val
= nir_system_values
[sv
];
3455 assert(val
.file
!= BAD_FILE
);
3456 dest
.type
= val
.type
;
3461 case nir_intrinsic_store_output
: {
3462 const fs_reg src
= get_nir_src(instr
->src
[0]);
3463 const unsigned store_offset
= nir_src_as_uint(instr
->src
[1]);
3464 const unsigned location
= nir_intrinsic_base(instr
) +
3465 SET_FIELD(store_offset
, BRW_NIR_FRAG_OUTPUT_LOCATION
);
3466 const fs_reg new_dest
= retype(alloc_frag_output(this, location
),
3469 for (unsigned j
= 0; j
< instr
->num_components
; j
++)
3470 bld
.MOV(offset(new_dest
, bld
, nir_intrinsic_component(instr
) + j
),
3471 offset(src
, bld
, j
));
3476 case nir_intrinsic_load_output
: {
3477 const unsigned l
= GET_FIELD(nir_intrinsic_base(instr
),
3478 BRW_NIR_FRAG_OUTPUT_LOCATION
);
3479 assert(l
>= FRAG_RESULT_DATA0
);
3480 const unsigned load_offset
= nir_src_as_uint(instr
->src
[0]);
3481 const unsigned target
= l
- FRAG_RESULT_DATA0
+ load_offset
;
3482 const fs_reg tmp
= bld
.vgrf(dest
.type
, 4);
3484 if (reinterpret_cast<const brw_wm_prog_key
*>(key
)->coherent_fb_fetch
)
3485 emit_coherent_fb_read(bld
, tmp
, target
);
3487 emit_non_coherent_fb_read(bld
, tmp
, target
);
3489 for (unsigned j
= 0; j
< instr
->num_components
; j
++) {
3490 bld
.MOV(offset(dest
, bld
, j
),
3491 offset(tmp
, bld
, nir_intrinsic_component(instr
) + j
));
3497 case nir_intrinsic_discard
:
3498 case nir_intrinsic_discard_if
: {
3499 /* We track our discarded pixels in f0.1. By predicating on it, we can
3500 * update just the flag bits that aren't yet discarded. If there's no
3501 * condition, we emit a CMP of g0 != g0, so all currently executing
3502 * channels will get turned off.
3505 if (instr
->intrinsic
== nir_intrinsic_discard_if
) {
3506 cmp
= bld
.CMP(bld
.null_reg_f(), get_nir_src(instr
->src
[0]),
3507 brw_imm_d(0), BRW_CONDITIONAL_Z
);
3509 fs_reg some_reg
= fs_reg(retype(brw_vec8_grf(0, 0),
3510 BRW_REGISTER_TYPE_UW
));
3511 cmp
= bld
.CMP(bld
.null_reg_f(), some_reg
, some_reg
, BRW_CONDITIONAL_NZ
);
3513 cmp
->predicate
= BRW_PREDICATE_NORMAL
;
3514 cmp
->flag_subreg
= 1;
3516 if (devinfo
->gen
>= 6) {
3517 emit_discard_jump();
3520 limit_dispatch_width(16, "Fragment discard not implemented in SIMD32 mode.");
3524 case nir_intrinsic_load_input
: {
3525 /* load_input is only used for flat inputs */
3526 unsigned base
= nir_intrinsic_base(instr
);
3527 unsigned comp
= nir_intrinsic_component(instr
);
3528 unsigned num_components
= instr
->num_components
;
3529 fs_reg orig_dest
= dest
;
3530 enum brw_reg_type type
= dest
.type
;
3532 /* Special case fields in the VUE header */
3533 if (base
== VARYING_SLOT_LAYER
)
3535 else if (base
== VARYING_SLOT_VIEWPORT
)
3538 if (nir_dest_bit_size(instr
->dest
) == 64) {
3539 /* const_index is in 32-bit type size units that could not be aligned
3540 * with DF. We need to read the double vector as if it was a float
3541 * vector of twice the number of components to fetch the right data.
3543 type
= BRW_REGISTER_TYPE_F
;
3544 num_components
*= 2;
3545 dest
= bld
.vgrf(type
, num_components
);
3548 for (unsigned int i
= 0; i
< num_components
; i
++) {
3549 bld
.MOV(offset(retype(dest
, type
), bld
, i
),
3550 retype(component(interp_reg(base
, comp
+ i
), 3), type
));
3553 if (nir_dest_bit_size(instr
->dest
) == 64) {
3554 shuffle_from_32bit_read(bld
, orig_dest
, dest
, 0,
3555 instr
->num_components
);
3560 case nir_intrinsic_load_barycentric_pixel
:
3561 case nir_intrinsic_load_barycentric_centroid
:
3562 case nir_intrinsic_load_barycentric_sample
:
3563 /* Do nothing - load_interpolated_input handling will handle it later. */
3566 case nir_intrinsic_load_barycentric_at_sample
: {
3567 const glsl_interp_mode interpolation
=
3568 (enum glsl_interp_mode
) nir_intrinsic_interp_mode(instr
);
3570 if (nir_src_is_const(instr
->src
[0])) {
3571 unsigned msg_data
= nir_src_as_uint(instr
->src
[0]) << 4;
3573 emit_pixel_interpolater_send(bld
,
3574 FS_OPCODE_INTERPOLATE_AT_SAMPLE
,
3577 brw_imm_ud(msg_data
),
3580 const fs_reg sample_src
= retype(get_nir_src(instr
->src
[0]),
3581 BRW_REGISTER_TYPE_UD
);
3583 if (nir_src_is_dynamically_uniform(instr
->src
[0])) {
3584 const fs_reg sample_id
= bld
.emit_uniformize(sample_src
);
3585 const fs_reg msg_data
= vgrf(glsl_type::uint_type
);
3586 bld
.exec_all().group(1, 0)
3587 .SHL(msg_data
, sample_id
, brw_imm_ud(4u));
3588 emit_pixel_interpolater_send(bld
,
3589 FS_OPCODE_INTERPOLATE_AT_SAMPLE
,
3595 /* Make a loop that sends a message to the pixel interpolater
3596 * for the sample number in each live channel. If there are
3597 * multiple channels with the same sample number then these
3598 * will be handled simultaneously with a single interation of
3601 bld
.emit(BRW_OPCODE_DO
);
3603 /* Get the next live sample number into sample_id_reg */
3604 const fs_reg sample_id
= bld
.emit_uniformize(sample_src
);
3606 /* Set the flag register so that we can perform the send
3607 * message on all channels that have the same sample number
3609 bld
.CMP(bld
.null_reg_ud(),
3610 sample_src
, sample_id
,
3611 BRW_CONDITIONAL_EQ
);
3612 const fs_reg msg_data
= vgrf(glsl_type::uint_type
);
3613 bld
.exec_all().group(1, 0)
3614 .SHL(msg_data
, sample_id
, brw_imm_ud(4u));
3616 emit_pixel_interpolater_send(bld
,
3617 FS_OPCODE_INTERPOLATE_AT_SAMPLE
,
3620 component(msg_data
, 0),
3622 set_predicate(BRW_PREDICATE_NORMAL
, inst
);
3624 /* Continue the loop if there are any live channels left */
3625 set_predicate_inv(BRW_PREDICATE_NORMAL
,
3627 bld
.emit(BRW_OPCODE_WHILE
));
3633 case nir_intrinsic_load_barycentric_at_offset
: {
3634 const glsl_interp_mode interpolation
=
3635 (enum glsl_interp_mode
) nir_intrinsic_interp_mode(instr
);
3637 nir_const_value
*const_offset
= nir_src_as_const_value(instr
->src
[0]);
3640 assert(nir_src_bit_size(instr
->src
[0]) == 32);
3641 unsigned off_x
= MIN2((int)(const_offset
[0].f32
* 16), 7) & 0xf;
3642 unsigned off_y
= MIN2((int)(const_offset
[1].f32
* 16), 7) & 0xf;
3644 emit_pixel_interpolater_send(bld
,
3645 FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET
,
3648 brw_imm_ud(off_x
| (off_y
<< 4)),
3651 fs_reg src
= vgrf(glsl_type::ivec2_type
);
3652 fs_reg offset_src
= retype(get_nir_src(instr
->src
[0]),
3653 BRW_REGISTER_TYPE_F
);
3654 for (int i
= 0; i
< 2; i
++) {
3655 fs_reg temp
= vgrf(glsl_type::float_type
);
3656 bld
.MUL(temp
, offset(offset_src
, bld
, i
), brw_imm_f(16.0f
));
3657 fs_reg itemp
= vgrf(glsl_type::int_type
);
3659 bld
.MOV(itemp
, temp
);
3661 /* Clamp the upper end of the range to +7/16.
3662 * ARB_gpu_shader5 requires that we support a maximum offset
3663 * of +0.5, which isn't representable in a S0.4 value -- if
3664 * we didn't clamp it, we'd end up with -8/16, which is the
3665 * opposite of what the shader author wanted.
3667 * This is legal due to ARB_gpu_shader5's quantization
3670 * "Not all values of <offset> may be supported; x and y
3671 * offsets may be rounded to fixed-point values with the
3672 * number of fraction bits given by the
3673 * implementation-dependent constant
3674 * FRAGMENT_INTERPOLATION_OFFSET_BITS"
3676 set_condmod(BRW_CONDITIONAL_L
,
3677 bld
.SEL(offset(src
, bld
, i
), itemp
, brw_imm_d(7)));
3680 const enum opcode opcode
= FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET
;
3681 emit_pixel_interpolater_send(bld
,
3691 case nir_intrinsic_load_interpolated_input
: {
3692 if (nir_intrinsic_base(instr
) == VARYING_SLOT_POS
) {
3693 emit_fragcoord_interpolation(dest
);
3697 assert(instr
->src
[0].ssa
&&
3698 instr
->src
[0].ssa
->parent_instr
->type
== nir_instr_type_intrinsic
);
3699 nir_intrinsic_instr
*bary_intrinsic
=
3700 nir_instr_as_intrinsic(instr
->src
[0].ssa
->parent_instr
);
3701 nir_intrinsic_op bary_intrin
= bary_intrinsic
->intrinsic
;
3702 enum glsl_interp_mode interp_mode
=
3703 (enum glsl_interp_mode
) nir_intrinsic_interp_mode(bary_intrinsic
);
3706 if (bary_intrin
== nir_intrinsic_load_barycentric_at_offset
||
3707 bary_intrin
== nir_intrinsic_load_barycentric_at_sample
) {
3708 /* Use the result of the PI message */
3709 dst_xy
= retype(get_nir_src(instr
->src
[0]), BRW_REGISTER_TYPE_F
);
3711 /* Use the delta_xy values computed from the payload */
3712 enum brw_barycentric_mode bary
=
3713 brw_barycentric_mode(interp_mode
, bary_intrin
);
3715 dst_xy
= this->delta_xy
[bary
];
3718 for (unsigned int i
= 0; i
< instr
->num_components
; i
++) {
3720 interp_reg(nir_intrinsic_base(instr
),
3721 nir_intrinsic_component(instr
) + i
);
3722 interp
.type
= BRW_REGISTER_TYPE_F
;
3723 dest
.type
= BRW_REGISTER_TYPE_F
;
3725 if (devinfo
->gen
< 6 && interp_mode
== INTERP_MODE_SMOOTH
) {
3726 fs_reg tmp
= vgrf(glsl_type::float_type
);
3727 bld
.emit(FS_OPCODE_LINTERP
, tmp
, dst_xy
, interp
);
3728 bld
.MUL(offset(dest
, bld
, i
), tmp
, this->pixel_w
);
3730 bld
.emit(FS_OPCODE_LINTERP
, offset(dest
, bld
, i
), dst_xy
, interp
);
3737 nir_emit_intrinsic(bld
, instr
);
3743 get_op_for_atomic_add(nir_intrinsic_instr
*instr
, unsigned src
)
3745 if (nir_src_is_const(instr
->src
[src
])) {
3746 int64_t add_val
= nir_src_as_int(instr
->src
[src
]);
3749 else if (add_val
== -1)
3757 fs_visitor::nir_emit_cs_intrinsic(const fs_builder
&bld
,
3758 nir_intrinsic_instr
*instr
)
3760 assert(stage
== MESA_SHADER_COMPUTE
);
3761 struct brw_cs_prog_data
*cs_prog_data
= brw_cs_prog_data(prog_data
);
3764 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
3765 dest
= get_nir_dest(instr
->dest
);
3767 switch (instr
->intrinsic
) {
3768 case nir_intrinsic_barrier
:
3770 cs_prog_data
->uses_barrier
= true;
3773 case nir_intrinsic_load_subgroup_id
:
3774 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_UD
), subgroup_id
);
3777 case nir_intrinsic_load_local_invocation_id
:
3778 case nir_intrinsic_load_work_group_id
: {
3779 gl_system_value sv
= nir_system_value_from_intrinsic(instr
->intrinsic
);
3780 fs_reg val
= nir_system_values
[sv
];
3781 assert(val
.file
!= BAD_FILE
);
3782 dest
.type
= val
.type
;
3783 for (unsigned i
= 0; i
< 3; i
++)
3784 bld
.MOV(offset(dest
, bld
, i
), offset(val
, bld
, i
));
3788 case nir_intrinsic_load_num_work_groups
: {
3789 const unsigned surface
=
3790 cs_prog_data
->binding_table
.work_groups_start
;
3792 cs_prog_data
->uses_num_work_groups
= true;
3794 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
3795 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = brw_imm_ud(surface
);
3796 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
3797 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(1); /* num components */
3799 /* Read the 3 GLuint components of gl_NumWorkGroups */
3800 for (unsigned i
= 0; i
< 3; i
++) {
3801 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = brw_imm_ud(i
<< 2);
3802 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL
,
3803 offset(dest
, bld
, i
), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
3808 case nir_intrinsic_shared_atomic_add
:
3809 nir_emit_shared_atomic(bld
, get_op_for_atomic_add(instr
, 1), instr
);
3811 case nir_intrinsic_shared_atomic_imin
:
3812 nir_emit_shared_atomic(bld
, BRW_AOP_IMIN
, instr
);
3814 case nir_intrinsic_shared_atomic_umin
:
3815 nir_emit_shared_atomic(bld
, BRW_AOP_UMIN
, instr
);
3817 case nir_intrinsic_shared_atomic_imax
:
3818 nir_emit_shared_atomic(bld
, BRW_AOP_IMAX
, instr
);
3820 case nir_intrinsic_shared_atomic_umax
:
3821 nir_emit_shared_atomic(bld
, BRW_AOP_UMAX
, instr
);
3823 case nir_intrinsic_shared_atomic_and
:
3824 nir_emit_shared_atomic(bld
, BRW_AOP_AND
, instr
);
3826 case nir_intrinsic_shared_atomic_or
:
3827 nir_emit_shared_atomic(bld
, BRW_AOP_OR
, instr
);
3829 case nir_intrinsic_shared_atomic_xor
:
3830 nir_emit_shared_atomic(bld
, BRW_AOP_XOR
, instr
);
3832 case nir_intrinsic_shared_atomic_exchange
:
3833 nir_emit_shared_atomic(bld
, BRW_AOP_MOV
, instr
);
3835 case nir_intrinsic_shared_atomic_comp_swap
:
3836 nir_emit_shared_atomic(bld
, BRW_AOP_CMPWR
, instr
);
3838 case nir_intrinsic_shared_atomic_fmin
:
3839 nir_emit_shared_atomic_float(bld
, BRW_AOP_FMIN
, instr
);
3841 case nir_intrinsic_shared_atomic_fmax
:
3842 nir_emit_shared_atomic_float(bld
, BRW_AOP_FMAX
, instr
);
3844 case nir_intrinsic_shared_atomic_fcomp_swap
:
3845 nir_emit_shared_atomic_float(bld
, BRW_AOP_FCMPWR
, instr
);
3848 case nir_intrinsic_load_shared
: {
3849 assert(devinfo
->gen
>= 7);
3850 assert(stage
== MESA_SHADER_COMPUTE
);
3852 const unsigned bit_size
= nir_dest_bit_size(instr
->dest
);
3853 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
3854 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = brw_imm_ud(GEN7_BTI_SLM
);
3855 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[0]);
3856 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
3858 /* Make dest unsigned because that's what the temporary will be */
3859 dest
.type
= brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
3861 /* Read the vector */
3862 if (nir_intrinsic_align(instr
) >= 4) {
3863 assert(nir_dest_bit_size(instr
->dest
) == 32);
3864 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
3866 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL
,
3867 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
3868 inst
->size_written
= instr
->num_components
* dispatch_width
* 4;
3870 assert(nir_dest_bit_size(instr
->dest
) <= 32);
3871 assert(nir_dest_num_components(instr
->dest
) == 1);
3872 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(bit_size
);
3874 fs_reg read_result
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
3875 bld
.emit(SHADER_OPCODE_BYTE_SCATTERED_READ_LOGICAL
,
3876 read_result
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
3877 bld
.MOV(dest
, read_result
);
3882 case nir_intrinsic_store_shared
: {
3883 assert(devinfo
->gen
>= 7);
3884 assert(stage
== MESA_SHADER_COMPUTE
);
3886 const unsigned bit_size
= nir_src_bit_size(instr
->src
[0]);
3887 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
3888 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = brw_imm_ud(GEN7_BTI_SLM
);
3889 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
3890 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
3892 fs_reg data
= get_nir_src(instr
->src
[0]);
3893 data
.type
= brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
3895 assert(nir_intrinsic_write_mask(instr
) ==
3896 (1u << instr
->num_components
) - 1);
3897 if (nir_intrinsic_align(instr
) >= 4) {
3898 assert(nir_src_bit_size(instr
->src
[0]) == 32);
3899 assert(nir_src_num_components(instr
->src
[0]) <= 4);
3900 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
3901 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
3902 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL
,
3903 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
3905 assert(nir_src_bit_size(instr
->src
[0]) <= 32);
3906 assert(nir_src_num_components(instr
->src
[0]) == 1);
3907 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(bit_size
);
3909 srcs
[SURFACE_LOGICAL_SRC_DATA
] = bld
.vgrf(BRW_REGISTER_TYPE_UD
);
3910 bld
.MOV(srcs
[SURFACE_LOGICAL_SRC_DATA
], data
);
3912 bld
.emit(SHADER_OPCODE_BYTE_SCATTERED_WRITE_LOGICAL
,
3913 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
3919 nir_emit_intrinsic(bld
, instr
);
3925 brw_nir_reduction_op_identity(const fs_builder
&bld
,
3926 nir_op op
, brw_reg_type type
)
3928 nir_const_value value
= nir_alu_binop_identity(op
, type_sz(type
) * 8);
3929 switch (type_sz(type
)) {
3931 assert(type
!= BRW_REGISTER_TYPE_HF
);
3932 return retype(brw_imm_uw(value
.u16
), type
);
3934 return retype(brw_imm_ud(value
.u32
), type
);
3936 if (type
== BRW_REGISTER_TYPE_DF
)
3937 return setup_imm_df(bld
, value
.f64
);
3939 return retype(brw_imm_u64(value
.u64
), type
);
3941 unreachable("Invalid type size");
3946 brw_op_for_nir_reduction_op(nir_op op
)
3949 case nir_op_iadd
: return BRW_OPCODE_ADD
;
3950 case nir_op_fadd
: return BRW_OPCODE_ADD
;
3951 case nir_op_imul
: return BRW_OPCODE_MUL
;
3952 case nir_op_fmul
: return BRW_OPCODE_MUL
;
3953 case nir_op_imin
: return BRW_OPCODE_SEL
;
3954 case nir_op_umin
: return BRW_OPCODE_SEL
;
3955 case nir_op_fmin
: return BRW_OPCODE_SEL
;
3956 case nir_op_imax
: return BRW_OPCODE_SEL
;
3957 case nir_op_umax
: return BRW_OPCODE_SEL
;
3958 case nir_op_fmax
: return BRW_OPCODE_SEL
;
3959 case nir_op_iand
: return BRW_OPCODE_AND
;
3960 case nir_op_ior
: return BRW_OPCODE_OR
;
3961 case nir_op_ixor
: return BRW_OPCODE_XOR
;
3963 unreachable("Invalid reduction operation");
3967 static brw_conditional_mod
3968 brw_cond_mod_for_nir_reduction_op(nir_op op
)
3971 case nir_op_iadd
: return BRW_CONDITIONAL_NONE
;
3972 case nir_op_fadd
: return BRW_CONDITIONAL_NONE
;
3973 case nir_op_imul
: return BRW_CONDITIONAL_NONE
;
3974 case nir_op_fmul
: return BRW_CONDITIONAL_NONE
;
3975 case nir_op_imin
: return BRW_CONDITIONAL_L
;
3976 case nir_op_umin
: return BRW_CONDITIONAL_L
;
3977 case nir_op_fmin
: return BRW_CONDITIONAL_L
;
3978 case nir_op_imax
: return BRW_CONDITIONAL_GE
;
3979 case nir_op_umax
: return BRW_CONDITIONAL_GE
;
3980 case nir_op_fmax
: return BRW_CONDITIONAL_GE
;
3981 case nir_op_iand
: return BRW_CONDITIONAL_NONE
;
3982 case nir_op_ior
: return BRW_CONDITIONAL_NONE
;
3983 case nir_op_ixor
: return BRW_CONDITIONAL_NONE
;
3985 unreachable("Invalid reduction operation");
3990 fs_visitor::get_nir_image_intrinsic_image(const brw::fs_builder
&bld
,
3991 nir_intrinsic_instr
*instr
)
3993 fs_reg image
= retype(get_nir_src_imm(instr
->src
[0]), BRW_REGISTER_TYPE_UD
);
3995 if (stage_prog_data
->binding_table
.image_start
> 0) {
3996 if (image
.file
== BRW_IMMEDIATE_VALUE
) {
3997 image
.d
+= stage_prog_data
->binding_table
.image_start
;
3999 bld
.ADD(image
, image
,
4000 brw_imm_d(stage_prog_data
->binding_table
.image_start
));
4004 return bld
.emit_uniformize(image
);
4008 fs_visitor::get_nir_ssbo_intrinsic_index(const brw::fs_builder
&bld
,
4009 nir_intrinsic_instr
*instr
)
4011 /* SSBO stores are weird in that their index is in src[1] */
4012 const unsigned src
= instr
->intrinsic
== nir_intrinsic_store_ssbo
? 1 : 0;
4015 if (nir_src_is_const(instr
->src
[src
])) {
4016 unsigned index
= stage_prog_data
->binding_table
.ssbo_start
+
4017 nir_src_as_uint(instr
->src
[src
]);
4018 surf_index
= brw_imm_ud(index
);
4020 surf_index
= vgrf(glsl_type::uint_type
);
4021 bld
.ADD(surf_index
, get_nir_src(instr
->src
[src
]),
4022 brw_imm_ud(stage_prog_data
->binding_table
.ssbo_start
));
4025 return bld
.emit_uniformize(surf_index
);
4029 image_intrinsic_coord_components(nir_intrinsic_instr
*instr
)
4031 switch (nir_intrinsic_image_dim(instr
)) {
4032 case GLSL_SAMPLER_DIM_1D
:
4033 return 1 + nir_intrinsic_image_array(instr
);
4034 case GLSL_SAMPLER_DIM_2D
:
4035 case GLSL_SAMPLER_DIM_RECT
:
4036 return 2 + nir_intrinsic_image_array(instr
);
4037 case GLSL_SAMPLER_DIM_3D
:
4038 case GLSL_SAMPLER_DIM_CUBE
:
4040 case GLSL_SAMPLER_DIM_BUF
:
4042 case GLSL_SAMPLER_DIM_MS
:
4043 return 2 + nir_intrinsic_image_array(instr
);
4045 unreachable("Invalid image dimension");
4050 fs_visitor::nir_emit_intrinsic(const fs_builder
&bld
, nir_intrinsic_instr
*instr
)
4053 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
4054 dest
= get_nir_dest(instr
->dest
);
4056 switch (instr
->intrinsic
) {
4057 case nir_intrinsic_image_load
:
4058 case nir_intrinsic_image_store
:
4059 case nir_intrinsic_image_atomic_add
:
4060 case nir_intrinsic_image_atomic_min
:
4061 case nir_intrinsic_image_atomic_max
:
4062 case nir_intrinsic_image_atomic_and
:
4063 case nir_intrinsic_image_atomic_or
:
4064 case nir_intrinsic_image_atomic_xor
:
4065 case nir_intrinsic_image_atomic_exchange
:
4066 case nir_intrinsic_image_atomic_comp_swap
:
4067 case nir_intrinsic_bindless_image_load
:
4068 case nir_intrinsic_bindless_image_store
:
4069 case nir_intrinsic_bindless_image_atomic_add
:
4070 case nir_intrinsic_bindless_image_atomic_min
:
4071 case nir_intrinsic_bindless_image_atomic_max
:
4072 case nir_intrinsic_bindless_image_atomic_and
:
4073 case nir_intrinsic_bindless_image_atomic_or
:
4074 case nir_intrinsic_bindless_image_atomic_xor
:
4075 case nir_intrinsic_bindless_image_atomic_exchange
:
4076 case nir_intrinsic_bindless_image_atomic_comp_swap
: {
4077 if (stage
== MESA_SHADER_FRAGMENT
&&
4078 instr
->intrinsic
!= nir_intrinsic_image_load
)
4079 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
4081 /* Get some metadata from the image intrinsic. */
4082 const nir_intrinsic_info
*info
= &nir_intrinsic_infos
[instr
->intrinsic
];
4083 const GLenum format
= nir_intrinsic_format(instr
);
4085 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
4087 switch (instr
->intrinsic
) {
4088 case nir_intrinsic_image_load
:
4089 case nir_intrinsic_image_store
:
4090 case nir_intrinsic_image_atomic_add
:
4091 case nir_intrinsic_image_atomic_min
:
4092 case nir_intrinsic_image_atomic_max
:
4093 case nir_intrinsic_image_atomic_and
:
4094 case nir_intrinsic_image_atomic_or
:
4095 case nir_intrinsic_image_atomic_xor
:
4096 case nir_intrinsic_image_atomic_exchange
:
4097 case nir_intrinsic_image_atomic_comp_swap
:
4098 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] =
4099 get_nir_image_intrinsic_image(bld
, instr
);
4104 srcs
[SURFACE_LOGICAL_SRC_SURFACE_HANDLE
] =
4105 bld
.emit_uniformize(get_nir_src(instr
->src
[0]));
4109 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
4110 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] =
4111 brw_imm_ud(image_intrinsic_coord_components(instr
));
4113 /* Emit an image load, store or atomic op. */
4114 if (instr
->intrinsic
== nir_intrinsic_image_load
||
4115 instr
->intrinsic
== nir_intrinsic_bindless_image_load
) {
4116 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4118 bld
.emit(SHADER_OPCODE_TYPED_SURFACE_READ_LOGICAL
,
4119 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4120 inst
->size_written
= instr
->num_components
* dispatch_width
* 4;
4121 } else if (instr
->intrinsic
== nir_intrinsic_image_store
||
4122 instr
->intrinsic
== nir_intrinsic_bindless_image_store
) {
4123 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4124 srcs
[SURFACE_LOGICAL_SRC_DATA
] = get_nir_src(instr
->src
[3]);
4125 bld
.emit(SHADER_OPCODE_TYPED_SURFACE_WRITE_LOGICAL
,
4126 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4129 unsigned num_srcs
= info
->num_srcs
;
4131 switch (instr
->intrinsic
) {
4132 case nir_intrinsic_image_atomic_add
:
4133 case nir_intrinsic_bindless_image_atomic_add
:
4134 assert(num_srcs
== 4);
4136 op
= get_op_for_atomic_add(instr
, 3);
4138 if (op
!= BRW_AOP_ADD
)
4141 case nir_intrinsic_image_atomic_min
:
4142 case nir_intrinsic_bindless_image_atomic_min
:
4143 assert(format
== GL_R32UI
|| format
== GL_R32I
);
4144 op
= (format
== GL_R32I
) ? BRW_AOP_IMIN
: BRW_AOP_UMIN
;
4146 case nir_intrinsic_image_atomic_max
:
4147 case nir_intrinsic_bindless_image_atomic_max
:
4148 assert(format
== GL_R32UI
|| format
== GL_R32I
);
4149 op
= (format
== GL_R32I
) ? BRW_AOP_IMAX
: BRW_AOP_UMAX
;
4151 case nir_intrinsic_image_atomic_and
:
4152 case nir_intrinsic_bindless_image_atomic_and
:
4155 case nir_intrinsic_image_atomic_or
:
4156 case nir_intrinsic_bindless_image_atomic_or
:
4159 case nir_intrinsic_image_atomic_xor
:
4160 case nir_intrinsic_bindless_image_atomic_xor
:
4163 case nir_intrinsic_image_atomic_exchange
:
4164 case nir_intrinsic_bindless_image_atomic_exchange
:
4167 case nir_intrinsic_image_atomic_comp_swap
:
4168 case nir_intrinsic_bindless_image_atomic_comp_swap
:
4172 unreachable("Not reachable.");
4175 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(op
);
4179 data
= get_nir_src(instr
->src
[3]);
4180 if (num_srcs
>= 5) {
4181 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
4182 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[4]) };
4183 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
4186 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
4188 bld
.emit(SHADER_OPCODE_TYPED_ATOMIC_LOGICAL
,
4189 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4194 case nir_intrinsic_image_size
:
4195 case nir_intrinsic_bindless_image_size
: {
4196 /* Unlike the [un]typed load and store opcodes, the TXS that this turns
4197 * into will handle the binding table index for us in the geneerator.
4198 * Incidentally, this means that we can handle bindless with exactly the
4201 fs_reg image
= retype(get_nir_src_imm(instr
->src
[0]),
4202 BRW_REGISTER_TYPE_UD
);
4203 image
= bld
.emit_uniformize(image
);
4205 fs_reg srcs
[TEX_LOGICAL_NUM_SRCS
];
4206 if (instr
->intrinsic
== nir_intrinsic_image_size
)
4207 srcs
[TEX_LOGICAL_SRC_SURFACE
] = image
;
4209 srcs
[TEX_LOGICAL_SRC_SURFACE_HANDLE
] = image
;
4210 srcs
[TEX_LOGICAL_SRC_SAMPLER
] = brw_imm_d(0);
4211 srcs
[TEX_LOGICAL_SRC_COORD_COMPONENTS
] = brw_imm_d(0);
4212 srcs
[TEX_LOGICAL_SRC_GRAD_COMPONENTS
] = brw_imm_d(0);
4214 /* Since the image size is always uniform, we can just emit a SIMD8
4215 * query instruction and splat the result out.
4217 const fs_builder ubld
= bld
.exec_all().group(8, 0);
4219 fs_reg tmp
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 4);
4220 fs_inst
*inst
= ubld
.emit(SHADER_OPCODE_IMAGE_SIZE_LOGICAL
,
4221 tmp
, srcs
, ARRAY_SIZE(srcs
));
4222 inst
->size_written
= 4 * REG_SIZE
;
4224 for (unsigned c
= 0; c
< instr
->dest
.ssa
.num_components
; ++c
) {
4225 if (c
== 2 && nir_intrinsic_image_dim(instr
) == GLSL_SAMPLER_DIM_CUBE
) {
4226 bld
.emit(SHADER_OPCODE_INT_QUOTIENT
,
4227 offset(retype(dest
, tmp
.type
), bld
, c
),
4228 component(offset(tmp
, ubld
, c
), 0), brw_imm_ud(6));
4230 bld
.MOV(offset(retype(dest
, tmp
.type
), bld
, c
),
4231 component(offset(tmp
, ubld
, c
), 0));
4237 case nir_intrinsic_image_load_raw_intel
: {
4238 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
4239 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] =
4240 get_nir_image_intrinsic_image(bld
, instr
);
4241 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
4242 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
4243 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4246 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL
,
4247 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4248 inst
->size_written
= instr
->num_components
* dispatch_width
* 4;
4252 case nir_intrinsic_image_store_raw_intel
: {
4253 if (stage
== MESA_SHADER_FRAGMENT
)
4254 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
4256 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
4257 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] =
4258 get_nir_image_intrinsic_image(bld
, instr
);
4259 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
4260 srcs
[SURFACE_LOGICAL_SRC_DATA
] = get_nir_src(instr
->src
[2]);
4261 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
4262 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4264 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL
,
4265 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4269 case nir_intrinsic_group_memory_barrier
:
4270 case nir_intrinsic_memory_barrier_shared
:
4271 case nir_intrinsic_memory_barrier_atomic_counter
:
4272 case nir_intrinsic_memory_barrier_buffer
:
4273 case nir_intrinsic_memory_barrier_image
:
4274 case nir_intrinsic_memory_barrier
: {
4275 const fs_builder ubld
= bld
.group(8, 0);
4276 const fs_reg tmp
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
4277 ubld
.emit(SHADER_OPCODE_MEMORY_FENCE
, tmp
,
4278 brw_vec8_grf(0, 0), brw_imm_ud(0))
4279 ->size_written
= 2 * REG_SIZE
;
4283 case nir_intrinsic_shader_clock
: {
4284 /* We cannot do anything if there is an event, so ignore it for now */
4285 const fs_reg shader_clock
= get_timestamp(bld
);
4286 const fs_reg srcs
[] = { component(shader_clock
, 0),
4287 component(shader_clock
, 1) };
4288 bld
.LOAD_PAYLOAD(dest
, srcs
, ARRAY_SIZE(srcs
), 0);
4292 case nir_intrinsic_image_samples
:
4293 /* The driver does not support multi-sampled images. */
4294 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
), brw_imm_d(1));
4297 case nir_intrinsic_load_uniform
: {
4298 /* Offsets are in bytes but they should always aligned to
4301 assert(instr
->const_index
[0] % 4 == 0 ||
4302 instr
->const_index
[0] % type_sz(dest
.type
) == 0);
4304 fs_reg
src(UNIFORM
, instr
->const_index
[0] / 4, dest
.type
);
4306 if (nir_src_is_const(instr
->src
[0])) {
4307 unsigned load_offset
= nir_src_as_uint(instr
->src
[0]);
4308 assert(load_offset
% type_sz(dest
.type
) == 0);
4309 /* For 16-bit types we add the module of the const_index[0]
4310 * offset to access to not 32-bit aligned element
4312 src
.offset
= load_offset
+ instr
->const_index
[0] % 4;
4314 for (unsigned j
= 0; j
< instr
->num_components
; j
++) {
4315 bld
.MOV(offset(dest
, bld
, j
), offset(src
, bld
, j
));
4318 fs_reg indirect
= retype(get_nir_src(instr
->src
[0]),
4319 BRW_REGISTER_TYPE_UD
);
4321 /* We need to pass a size to the MOV_INDIRECT but we don't want it to
4322 * go past the end of the uniform. In order to keep the n'th
4323 * component from running past, we subtract off the size of all but
4324 * one component of the vector.
4326 assert(instr
->const_index
[1] >=
4327 instr
->num_components
* (int) type_sz(dest
.type
));
4328 unsigned read_size
= instr
->const_index
[1] -
4329 (instr
->num_components
- 1) * type_sz(dest
.type
);
4331 bool supports_64bit_indirects
=
4332 !devinfo
->is_cherryview
&& !gen_device_info_is_9lp(devinfo
);
4334 if (type_sz(dest
.type
) != 8 || supports_64bit_indirects
) {
4335 for (unsigned j
= 0; j
< instr
->num_components
; j
++) {
4336 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
,
4337 offset(dest
, bld
, j
), offset(src
, bld
, j
),
4338 indirect
, brw_imm_ud(read_size
));
4341 const unsigned num_mov_indirects
=
4342 type_sz(dest
.type
) / type_sz(BRW_REGISTER_TYPE_UD
);
4343 /* We read a little bit less per MOV INDIRECT, as they are now
4344 * 32-bits ones instead of 64-bit. Fix read_size then.
4346 const unsigned read_size_32bit
= read_size
-
4347 (num_mov_indirects
- 1) * type_sz(BRW_REGISTER_TYPE_UD
);
4348 for (unsigned j
= 0; j
< instr
->num_components
; j
++) {
4349 for (unsigned i
= 0; i
< num_mov_indirects
; i
++) {
4350 bld
.emit(SHADER_OPCODE_MOV_INDIRECT
,
4351 subscript(offset(dest
, bld
, j
), BRW_REGISTER_TYPE_UD
, i
),
4352 subscript(offset(src
, bld
, j
), BRW_REGISTER_TYPE_UD
, i
),
4353 indirect
, brw_imm_ud(read_size_32bit
));
4361 case nir_intrinsic_load_ubo
: {
4363 if (nir_src_is_const(instr
->src
[0])) {
4364 const unsigned index
= stage_prog_data
->binding_table
.ubo_start
+
4365 nir_src_as_uint(instr
->src
[0]);
4366 surf_index
= brw_imm_ud(index
);
4368 /* The block index is not a constant. Evaluate the index expression
4369 * per-channel and add the base UBO index; we have to select a value
4370 * from any live channel.
4372 surf_index
= vgrf(glsl_type::uint_type
);
4373 bld
.ADD(surf_index
, get_nir_src(instr
->src
[0]),
4374 brw_imm_ud(stage_prog_data
->binding_table
.ubo_start
));
4375 surf_index
= bld
.emit_uniformize(surf_index
);
4378 if (!nir_src_is_const(instr
->src
[1])) {
4379 fs_reg base_offset
= retype(get_nir_src(instr
->src
[1]),
4380 BRW_REGISTER_TYPE_UD
);
4382 for (int i
= 0; i
< instr
->num_components
; i
++)
4383 VARYING_PULL_CONSTANT_LOAD(bld
, offset(dest
, bld
, i
), surf_index
,
4384 base_offset
, i
* type_sz(dest
.type
));
4386 /* Even if we are loading doubles, a pull constant load will load
4387 * a 32-bit vec4, so should only reserve vgrf space for that. If we
4388 * need to load a full dvec4 we will have to emit 2 loads. This is
4389 * similar to demote_pull_constants(), except that in that case we
4390 * see individual accesses to each component of the vector and then
4391 * we let CSE deal with duplicate loads. Here we see a vector access
4392 * and we have to split it if necessary.
4394 const unsigned type_size
= type_sz(dest
.type
);
4395 const unsigned load_offset
= nir_src_as_uint(instr
->src
[1]);
4397 /* See if we've selected this as a push constant candidate */
4398 if (nir_src_is_const(instr
->src
[0])) {
4399 const unsigned ubo_block
= nir_src_as_uint(instr
->src
[0]);
4400 const unsigned offset_256b
= load_offset
/ 32;
4403 for (int i
= 0; i
< 4; i
++) {
4404 const struct brw_ubo_range
*range
= &prog_data
->ubo_ranges
[i
];
4405 if (range
->block
== ubo_block
&&
4406 offset_256b
>= range
->start
&&
4407 offset_256b
< range
->start
+ range
->length
) {
4409 push_reg
= fs_reg(UNIFORM
, UBO_START
+ i
, dest
.type
);
4410 push_reg
.offset
= load_offset
- 32 * range
->start
;
4415 if (push_reg
.file
!= BAD_FILE
) {
4416 for (unsigned i
= 0; i
< instr
->num_components
; i
++) {
4417 bld
.MOV(offset(dest
, bld
, i
),
4418 byte_offset(push_reg
, i
* type_size
));
4424 const unsigned block_sz
= 64; /* Fetch one cacheline at a time. */
4425 const fs_builder ubld
= bld
.exec_all().group(block_sz
/ 4, 0);
4426 const fs_reg packed_consts
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
);
4428 for (unsigned c
= 0; c
< instr
->num_components
;) {
4429 const unsigned base
= load_offset
+ c
* type_size
;
4430 /* Number of usable components in the next block-aligned load. */
4431 const unsigned count
= MIN2(instr
->num_components
- c
,
4432 (block_sz
- base
% block_sz
) / type_size
);
4434 ubld
.emit(FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD
,
4435 packed_consts
, surf_index
,
4436 brw_imm_ud(base
& ~(block_sz
- 1)));
4438 const fs_reg consts
=
4439 retype(byte_offset(packed_consts
, base
& (block_sz
- 1)),
4442 for (unsigned d
= 0; d
< count
; d
++)
4443 bld
.MOV(offset(dest
, bld
, c
+ d
), component(consts
, d
));
4451 case nir_intrinsic_load_global
: {
4452 assert(devinfo
->gen
>= 8);
4454 if (nir_intrinsic_align(instr
) >= 4) {
4455 assert(nir_dest_bit_size(instr
->dest
) == 32);
4456 fs_inst
*inst
= bld
.emit(SHADER_OPCODE_A64_UNTYPED_READ_LOGICAL
,
4458 get_nir_src(instr
->src
[0]), /* Address */
4459 fs_reg(), /* No source data */
4460 brw_imm_ud(instr
->num_components
));
4461 inst
->size_written
= instr
->num_components
*
4462 inst
->dst
.component_size(inst
->exec_size
);
4464 const unsigned bit_size
= nir_dest_bit_size(instr
->dest
);
4465 assert(bit_size
<= 32);
4466 assert(nir_dest_num_components(instr
->dest
) == 1);
4467 brw_reg_type data_type
=
4468 brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
4469 fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
4470 bld
.emit(SHADER_OPCODE_A64_BYTE_SCATTERED_READ_LOGICAL
,
4472 get_nir_src(instr
->src
[0]), /* Address */
4473 fs_reg(), /* No source data */
4474 brw_imm_ud(bit_size
));
4475 bld
.MOV(retype(dest
, data_type
), tmp
);
4480 case nir_intrinsic_store_global
:
4481 assert(devinfo
->gen
>= 8);
4483 if (stage
== MESA_SHADER_FRAGMENT
)
4484 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
4486 if (nir_intrinsic_align(instr
) >= 4) {
4487 assert(nir_src_bit_size(instr
->src
[0]) == 32);
4488 bld
.emit(SHADER_OPCODE_A64_UNTYPED_WRITE_LOGICAL
,
4490 get_nir_src(instr
->src
[1]), /* Address */
4491 get_nir_src(instr
->src
[0]), /* Data */
4492 brw_imm_ud(instr
->num_components
));
4494 const unsigned bit_size
= nir_src_bit_size(instr
->src
[0]);
4495 assert(bit_size
<= 32);
4496 assert(nir_src_num_components(instr
->src
[0]) == 1);
4497 brw_reg_type data_type
=
4498 brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
4499 fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
4500 bld
.MOV(tmp
, retype(get_nir_src(instr
->src
[0]), data_type
));
4501 bld
.emit(SHADER_OPCODE_A64_BYTE_SCATTERED_WRITE_LOGICAL
,
4503 get_nir_src(instr
->src
[1]), /* Address */
4505 brw_imm_ud(nir_src_bit_size(instr
->src
[0])));
4509 case nir_intrinsic_global_atomic_add
:
4510 nir_emit_global_atomic(bld
, get_op_for_atomic_add(instr
, 1), instr
);
4512 case nir_intrinsic_global_atomic_imin
:
4513 nir_emit_global_atomic(bld
, BRW_AOP_IMIN
, instr
);
4515 case nir_intrinsic_global_atomic_umin
:
4516 nir_emit_global_atomic(bld
, BRW_AOP_UMIN
, instr
);
4518 case nir_intrinsic_global_atomic_imax
:
4519 nir_emit_global_atomic(bld
, BRW_AOP_IMAX
, instr
);
4521 case nir_intrinsic_global_atomic_umax
:
4522 nir_emit_global_atomic(bld
, BRW_AOP_UMAX
, instr
);
4524 case nir_intrinsic_global_atomic_and
:
4525 nir_emit_global_atomic(bld
, BRW_AOP_AND
, instr
);
4527 case nir_intrinsic_global_atomic_or
:
4528 nir_emit_global_atomic(bld
, BRW_AOP_OR
, instr
);
4530 case nir_intrinsic_global_atomic_xor
:
4531 nir_emit_global_atomic(bld
, BRW_AOP_XOR
, instr
);
4533 case nir_intrinsic_global_atomic_exchange
:
4534 nir_emit_global_atomic(bld
, BRW_AOP_MOV
, instr
);
4536 case nir_intrinsic_global_atomic_comp_swap
:
4537 nir_emit_global_atomic(bld
, BRW_AOP_CMPWR
, instr
);
4539 case nir_intrinsic_global_atomic_fmin
:
4540 nir_emit_global_atomic_float(bld
, BRW_AOP_FMIN
, instr
);
4542 case nir_intrinsic_global_atomic_fmax
:
4543 nir_emit_global_atomic_float(bld
, BRW_AOP_FMAX
, instr
);
4545 case nir_intrinsic_global_atomic_fcomp_swap
:
4546 nir_emit_global_atomic_float(bld
, BRW_AOP_FCMPWR
, instr
);
4549 case nir_intrinsic_load_ssbo
: {
4550 assert(devinfo
->gen
>= 7);
4552 const unsigned bit_size
= nir_dest_bit_size(instr
->dest
);
4553 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
4554 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] =
4555 get_nir_ssbo_intrinsic_index(bld
, instr
);
4556 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
4557 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
4559 /* Make dest unsigned because that's what the temporary will be */
4560 dest
.type
= brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
4562 /* Read the vector */
4563 if (nir_intrinsic_align(instr
) >= 4) {
4564 assert(nir_dest_bit_size(instr
->dest
) == 32);
4565 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4567 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_READ_LOGICAL
,
4568 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4569 inst
->size_written
= instr
->num_components
* dispatch_width
* 4;
4571 assert(nir_dest_bit_size(instr
->dest
) <= 32);
4572 assert(nir_dest_num_components(instr
->dest
) == 1);
4573 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(bit_size
);
4575 fs_reg read_result
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
4576 bld
.emit(SHADER_OPCODE_BYTE_SCATTERED_READ_LOGICAL
,
4577 read_result
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4578 bld
.MOV(dest
, read_result
);
4583 case nir_intrinsic_store_ssbo
: {
4584 assert(devinfo
->gen
>= 7);
4586 if (stage
== MESA_SHADER_FRAGMENT
)
4587 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
4589 const unsigned bit_size
= nir_src_bit_size(instr
->src
[0]);
4590 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
4591 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] =
4592 get_nir_ssbo_intrinsic_index(bld
, instr
);
4593 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[2]);
4594 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
4596 fs_reg data
= get_nir_src(instr
->src
[0]);
4597 data
.type
= brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_UD
);
4599 assert(nir_intrinsic_write_mask(instr
) ==
4600 (1u << instr
->num_components
) - 1);
4601 if (nir_intrinsic_align(instr
) >= 4) {
4602 assert(nir_src_bit_size(instr
->src
[0]) == 32);
4603 assert(nir_src_num_components(instr
->src
[0]) <= 4);
4604 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
4605 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(instr
->num_components
);
4606 bld
.emit(SHADER_OPCODE_UNTYPED_SURFACE_WRITE_LOGICAL
,
4607 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4609 assert(nir_src_bit_size(instr
->src
[0]) <= 32);
4610 assert(nir_src_num_components(instr
->src
[0]) == 1);
4611 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(bit_size
);
4613 srcs
[SURFACE_LOGICAL_SRC_DATA
] = bld
.vgrf(BRW_REGISTER_TYPE_UD
);
4614 bld
.MOV(srcs
[SURFACE_LOGICAL_SRC_DATA
], data
);
4616 bld
.emit(SHADER_OPCODE_BYTE_SCATTERED_WRITE_LOGICAL
,
4617 fs_reg(), srcs
, SURFACE_LOGICAL_NUM_SRCS
);
4622 case nir_intrinsic_store_output
: {
4623 fs_reg src
= get_nir_src(instr
->src
[0]);
4625 unsigned store_offset
= nir_src_as_uint(instr
->src
[1]);
4626 unsigned num_components
= instr
->num_components
;
4627 unsigned first_component
= nir_intrinsic_component(instr
);
4628 if (nir_src_bit_size(instr
->src
[0]) == 64) {
4629 src
= shuffle_for_32bit_write(bld
, src
, 0, num_components
);
4630 num_components
*= 2;
4633 fs_reg new_dest
= retype(offset(outputs
[instr
->const_index
[0]], bld
,
4634 4 * store_offset
), src
.type
);
4635 for (unsigned j
= 0; j
< num_components
; j
++) {
4636 bld
.MOV(offset(new_dest
, bld
, j
+ first_component
),
4637 offset(src
, bld
, j
));
4642 case nir_intrinsic_ssbo_atomic_add
:
4643 nir_emit_ssbo_atomic(bld
, get_op_for_atomic_add(instr
, 2), instr
);
4645 case nir_intrinsic_ssbo_atomic_imin
:
4646 nir_emit_ssbo_atomic(bld
, BRW_AOP_IMIN
, instr
);
4648 case nir_intrinsic_ssbo_atomic_umin
:
4649 nir_emit_ssbo_atomic(bld
, BRW_AOP_UMIN
, instr
);
4651 case nir_intrinsic_ssbo_atomic_imax
:
4652 nir_emit_ssbo_atomic(bld
, BRW_AOP_IMAX
, instr
);
4654 case nir_intrinsic_ssbo_atomic_umax
:
4655 nir_emit_ssbo_atomic(bld
, BRW_AOP_UMAX
, instr
);
4657 case nir_intrinsic_ssbo_atomic_and
:
4658 nir_emit_ssbo_atomic(bld
, BRW_AOP_AND
, instr
);
4660 case nir_intrinsic_ssbo_atomic_or
:
4661 nir_emit_ssbo_atomic(bld
, BRW_AOP_OR
, instr
);
4663 case nir_intrinsic_ssbo_atomic_xor
:
4664 nir_emit_ssbo_atomic(bld
, BRW_AOP_XOR
, instr
);
4666 case nir_intrinsic_ssbo_atomic_exchange
:
4667 nir_emit_ssbo_atomic(bld
, BRW_AOP_MOV
, instr
);
4669 case nir_intrinsic_ssbo_atomic_comp_swap
:
4670 nir_emit_ssbo_atomic(bld
, BRW_AOP_CMPWR
, instr
);
4672 case nir_intrinsic_ssbo_atomic_fmin
:
4673 nir_emit_ssbo_atomic_float(bld
, BRW_AOP_FMIN
, instr
);
4675 case nir_intrinsic_ssbo_atomic_fmax
:
4676 nir_emit_ssbo_atomic_float(bld
, BRW_AOP_FMAX
, instr
);
4678 case nir_intrinsic_ssbo_atomic_fcomp_swap
:
4679 nir_emit_ssbo_atomic_float(bld
, BRW_AOP_FCMPWR
, instr
);
4682 case nir_intrinsic_get_buffer_size
: {
4683 assert(nir_src_num_components(instr
->src
[0]) == 1);
4684 unsigned ssbo_index
= nir_src_is_const(instr
->src
[0]) ?
4685 nir_src_as_uint(instr
->src
[0]) : 0;
4687 /* A resinfo's sampler message is used to get the buffer size. The
4688 * SIMD8's writeback message consists of four registers and SIMD16's
4689 * writeback message consists of 8 destination registers (two per each
4690 * component). Because we are only interested on the first channel of
4691 * the first returned component, where resinfo returns the buffer size
4692 * for SURFTYPE_BUFFER, we can just use the SIMD8 variant regardless of
4693 * the dispatch width.
4695 const fs_builder ubld
= bld
.exec_all().group(8, 0);
4696 fs_reg src_payload
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
);
4697 fs_reg ret_payload
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 4);
4700 ubld
.MOV(src_payload
, brw_imm_d(0));
4702 const unsigned index
= prog_data
->binding_table
.ssbo_start
+ ssbo_index
;
4703 fs_inst
*inst
= ubld
.emit(SHADER_OPCODE_GET_BUFFER_SIZE
, ret_payload
,
4704 src_payload
, brw_imm_ud(index
));
4705 inst
->header_size
= 0;
4707 inst
->size_written
= 4 * REG_SIZE
;
4709 /* SKL PRM, vol07, 3D Media GPGPU Engine, Bounds Checking and Faulting:
4711 * "Out-of-bounds checking is always performed at a DWord granularity. If
4712 * any part of the DWord is out-of-bounds then the whole DWord is
4713 * considered out-of-bounds."
4715 * This implies that types with size smaller than 4-bytes need to be
4716 * padded if they don't complete the last dword of the buffer. But as we
4717 * need to maintain the original size we need to reverse the padding
4718 * calculation to return the correct size to know the number of elements
4719 * of an unsized array. As we stored in the last two bits of the surface
4720 * size the needed padding for the buffer, we calculate here the
4721 * original buffer_size reversing the surface_size calculation:
4723 * surface_size = isl_align(buffer_size, 4) +
4724 * (isl_align(buffer_size) - buffer_size)
4726 * buffer_size = surface_size & ~3 - surface_size & 3
4729 fs_reg size_aligned4
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
);
4730 fs_reg size_padding
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
);
4731 fs_reg buffer_size
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
);
4733 ubld
.AND(size_padding
, ret_payload
, brw_imm_ud(3));
4734 ubld
.AND(size_aligned4
, ret_payload
, brw_imm_ud(~3));
4735 ubld
.ADD(buffer_size
, size_aligned4
, negate(size_padding
));
4737 bld
.MOV(retype(dest
, ret_payload
.type
), component(buffer_size
, 0));
4741 case nir_intrinsic_load_subgroup_invocation
:
4742 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
),
4743 nir_system_values
[SYSTEM_VALUE_SUBGROUP_INVOCATION
]);
4746 case nir_intrinsic_load_subgroup_eq_mask
:
4747 case nir_intrinsic_load_subgroup_ge_mask
:
4748 case nir_intrinsic_load_subgroup_gt_mask
:
4749 case nir_intrinsic_load_subgroup_le_mask
:
4750 case nir_intrinsic_load_subgroup_lt_mask
:
4751 unreachable("not reached");
4753 case nir_intrinsic_vote_any
: {
4754 const fs_builder ubld
= bld
.exec_all().group(1, 0);
4756 /* The any/all predicates do not consider channel enables. To prevent
4757 * dead channels from affecting the result, we initialize the flag with
4758 * with the identity value for the logical operation.
4760 if (dispatch_width
== 32) {
4761 /* For SIMD32, we use a UD type so we fill both f0.0 and f0.1. */
4762 ubld
.MOV(retype(brw_flag_reg(0, 0), BRW_REGISTER_TYPE_UD
),
4765 ubld
.MOV(brw_flag_reg(0, 0), brw_imm_uw(0));
4767 bld
.CMP(bld
.null_reg_d(), get_nir_src(instr
->src
[0]), brw_imm_d(0), BRW_CONDITIONAL_NZ
);
4769 /* For some reason, the any/all predicates don't work properly with
4770 * SIMD32. In particular, it appears that a SEL with a QtrCtrl of 2H
4771 * doesn't read the correct subset of the flag register and you end up
4772 * getting garbage in the second half. Work around this by using a pair
4773 * of 1-wide MOVs and scattering the result.
4775 fs_reg res1
= ubld
.vgrf(BRW_REGISTER_TYPE_D
);
4776 ubld
.MOV(res1
, brw_imm_d(0));
4777 set_predicate(dispatch_width
== 8 ? BRW_PREDICATE_ALIGN1_ANY8H
:
4778 dispatch_width
== 16 ? BRW_PREDICATE_ALIGN1_ANY16H
:
4779 BRW_PREDICATE_ALIGN1_ANY32H
,
4780 ubld
.MOV(res1
, brw_imm_d(-1)));
4782 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
), component(res1
, 0));
4785 case nir_intrinsic_vote_all
: {
4786 const fs_builder ubld
= bld
.exec_all().group(1, 0);
4788 /* The any/all predicates do not consider channel enables. To prevent
4789 * dead channels from affecting the result, we initialize the flag with
4790 * with the identity value for the logical operation.
4792 if (dispatch_width
== 32) {
4793 /* For SIMD32, we use a UD type so we fill both f0.0 and f0.1. */
4794 ubld
.MOV(retype(brw_flag_reg(0, 0), BRW_REGISTER_TYPE_UD
),
4795 brw_imm_ud(0xffffffff));
4797 ubld
.MOV(brw_flag_reg(0, 0), brw_imm_uw(0xffff));
4799 bld
.CMP(bld
.null_reg_d(), get_nir_src(instr
->src
[0]), brw_imm_d(0), BRW_CONDITIONAL_NZ
);
4801 /* For some reason, the any/all predicates don't work properly with
4802 * SIMD32. In particular, it appears that a SEL with a QtrCtrl of 2H
4803 * doesn't read the correct subset of the flag register and you end up
4804 * getting garbage in the second half. Work around this by using a pair
4805 * of 1-wide MOVs and scattering the result.
4807 fs_reg res1
= ubld
.vgrf(BRW_REGISTER_TYPE_D
);
4808 ubld
.MOV(res1
, brw_imm_d(0));
4809 set_predicate(dispatch_width
== 8 ? BRW_PREDICATE_ALIGN1_ALL8H
:
4810 dispatch_width
== 16 ? BRW_PREDICATE_ALIGN1_ALL16H
:
4811 BRW_PREDICATE_ALIGN1_ALL32H
,
4812 ubld
.MOV(res1
, brw_imm_d(-1)));
4814 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
), component(res1
, 0));
4817 case nir_intrinsic_vote_feq
:
4818 case nir_intrinsic_vote_ieq
: {
4819 fs_reg value
= get_nir_src(instr
->src
[0]);
4820 if (instr
->intrinsic
== nir_intrinsic_vote_feq
) {
4821 const unsigned bit_size
= nir_src_bit_size(instr
->src
[0]);
4822 value
.type
= bit_size
== 8 ? BRW_REGISTER_TYPE_B
:
4823 brw_reg_type_from_bit_size(bit_size
, BRW_REGISTER_TYPE_F
);
4826 fs_reg uniformized
= bld
.emit_uniformize(value
);
4827 const fs_builder ubld
= bld
.exec_all().group(1, 0);
4829 /* The any/all predicates do not consider channel enables. To prevent
4830 * dead channels from affecting the result, we initialize the flag with
4831 * with the identity value for the logical operation.
4833 if (dispatch_width
== 32) {
4834 /* For SIMD32, we use a UD type so we fill both f0.0 and f0.1. */
4835 ubld
.MOV(retype(brw_flag_reg(0, 0), BRW_REGISTER_TYPE_UD
),
4836 brw_imm_ud(0xffffffff));
4838 ubld
.MOV(brw_flag_reg(0, 0), brw_imm_uw(0xffff));
4840 bld
.CMP(bld
.null_reg_d(), value
, uniformized
, BRW_CONDITIONAL_Z
);
4842 /* For some reason, the any/all predicates don't work properly with
4843 * SIMD32. In particular, it appears that a SEL with a QtrCtrl of 2H
4844 * doesn't read the correct subset of the flag register and you end up
4845 * getting garbage in the second half. Work around this by using a pair
4846 * of 1-wide MOVs and scattering the result.
4848 fs_reg res1
= ubld
.vgrf(BRW_REGISTER_TYPE_D
);
4849 ubld
.MOV(res1
, brw_imm_d(0));
4850 set_predicate(dispatch_width
== 8 ? BRW_PREDICATE_ALIGN1_ALL8H
:
4851 dispatch_width
== 16 ? BRW_PREDICATE_ALIGN1_ALL16H
:
4852 BRW_PREDICATE_ALIGN1_ALL32H
,
4853 ubld
.MOV(res1
, brw_imm_d(-1)));
4855 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_D
), component(res1
, 0));
4859 case nir_intrinsic_ballot
: {
4860 const fs_reg value
= retype(get_nir_src(instr
->src
[0]),
4861 BRW_REGISTER_TYPE_UD
);
4862 struct brw_reg flag
= brw_flag_reg(0, 0);
4863 /* FIXME: For SIMD32 programs, this causes us to stomp on f0.1 as well
4864 * as f0.0. This is a problem for fragment programs as we currently use
4865 * f0.1 for discards. Fortunately, we don't support SIMD32 fragment
4866 * programs yet so this isn't a problem. When we do, something will
4869 if (dispatch_width
== 32)
4870 flag
.type
= BRW_REGISTER_TYPE_UD
;
4872 bld
.exec_all().group(1, 0).MOV(flag
, brw_imm_ud(0u));
4873 bld
.CMP(bld
.null_reg_ud(), value
, brw_imm_ud(0u), BRW_CONDITIONAL_NZ
);
4875 if (instr
->dest
.ssa
.bit_size
> 32) {
4876 dest
.type
= BRW_REGISTER_TYPE_UQ
;
4878 dest
.type
= BRW_REGISTER_TYPE_UD
;
4880 bld
.MOV(dest
, flag
);
4884 case nir_intrinsic_read_invocation
: {
4885 const fs_reg value
= get_nir_src(instr
->src
[0]);
4886 const fs_reg invocation
= get_nir_src(instr
->src
[1]);
4887 fs_reg tmp
= bld
.vgrf(value
.type
);
4889 bld
.exec_all().emit(SHADER_OPCODE_BROADCAST
, tmp
, value
,
4890 bld
.emit_uniformize(invocation
));
4892 bld
.MOV(retype(dest
, value
.type
), fs_reg(component(tmp
, 0)));
4896 case nir_intrinsic_read_first_invocation
: {
4897 const fs_reg value
= get_nir_src(instr
->src
[0]);
4898 bld
.MOV(retype(dest
, value
.type
), bld
.emit_uniformize(value
));
4902 case nir_intrinsic_shuffle
: {
4903 const fs_reg value
= get_nir_src(instr
->src
[0]);
4904 const fs_reg index
= get_nir_src(instr
->src
[1]);
4906 bld
.emit(SHADER_OPCODE_SHUFFLE
, retype(dest
, value
.type
), value
, index
);
4910 case nir_intrinsic_first_invocation
: {
4911 fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_UD
);
4912 bld
.exec_all().emit(SHADER_OPCODE_FIND_LIVE_CHANNEL
, tmp
);
4913 bld
.MOV(retype(dest
, BRW_REGISTER_TYPE_UD
),
4914 fs_reg(component(tmp
, 0)));
4918 case nir_intrinsic_quad_broadcast
: {
4919 const fs_reg value
= get_nir_src(instr
->src
[0]);
4920 const unsigned index
= nir_src_as_uint(instr
->src
[1]);
4922 bld
.emit(SHADER_OPCODE_CLUSTER_BROADCAST
, retype(dest
, value
.type
),
4923 value
, brw_imm_ud(index
), brw_imm_ud(4));
4927 case nir_intrinsic_quad_swap_horizontal
: {
4928 const fs_reg value
= get_nir_src(instr
->src
[0]);
4929 const fs_reg tmp
= bld
.vgrf(value
.type
);
4930 const fs_builder ubld
= bld
.exec_all().group(dispatch_width
/ 2, 0);
4932 const fs_reg src_left
= horiz_stride(value
, 2);
4933 const fs_reg src_right
= horiz_stride(horiz_offset(value
, 1), 2);
4934 const fs_reg tmp_left
= horiz_stride(tmp
, 2);
4935 const fs_reg tmp_right
= horiz_stride(horiz_offset(tmp
, 1), 2);
4937 ubld
.MOV(tmp_left
, src_right
);
4938 ubld
.MOV(tmp_right
, src_left
);
4940 bld
.MOV(retype(dest
, value
.type
), tmp
);
4944 case nir_intrinsic_quad_swap_vertical
: {
4945 const fs_reg value
= get_nir_src(instr
->src
[0]);
4946 if (nir_src_bit_size(instr
->src
[0]) == 32) {
4947 /* For 32-bit, we can use a SIMD4x2 instruction to do this easily */
4948 const fs_reg tmp
= bld
.vgrf(value
.type
);
4949 const fs_builder ubld
= bld
.exec_all();
4950 ubld
.emit(SHADER_OPCODE_QUAD_SWIZZLE
, tmp
, value
,
4951 brw_imm_ud(BRW_SWIZZLE4(2,3,0,1)));
4952 bld
.MOV(retype(dest
, value
.type
), tmp
);
4954 /* For larger data types, we have to either emit dispatch_width many
4955 * MOVs or else fall back to doing indirects.
4957 fs_reg idx
= bld
.vgrf(BRW_REGISTER_TYPE_W
);
4958 bld
.XOR(idx
, nir_system_values
[SYSTEM_VALUE_SUBGROUP_INVOCATION
],
4960 bld
.emit(SHADER_OPCODE_SHUFFLE
, retype(dest
, value
.type
), value
, idx
);
4965 case nir_intrinsic_quad_swap_diagonal
: {
4966 const fs_reg value
= get_nir_src(instr
->src
[0]);
4967 if (nir_src_bit_size(instr
->src
[0]) == 32) {
4968 /* For 32-bit, we can use a SIMD4x2 instruction to do this easily */
4969 const fs_reg tmp
= bld
.vgrf(value
.type
);
4970 const fs_builder ubld
= bld
.exec_all();
4971 ubld
.emit(SHADER_OPCODE_QUAD_SWIZZLE
, tmp
, value
,
4972 brw_imm_ud(BRW_SWIZZLE4(3,2,1,0)));
4973 bld
.MOV(retype(dest
, value
.type
), tmp
);
4975 /* For larger data types, we have to either emit dispatch_width many
4976 * MOVs or else fall back to doing indirects.
4978 fs_reg idx
= bld
.vgrf(BRW_REGISTER_TYPE_W
);
4979 bld
.XOR(idx
, nir_system_values
[SYSTEM_VALUE_SUBGROUP_INVOCATION
],
4981 bld
.emit(SHADER_OPCODE_SHUFFLE
, retype(dest
, value
.type
), value
, idx
);
4986 case nir_intrinsic_reduce
: {
4987 fs_reg src
= get_nir_src(instr
->src
[0]);
4988 nir_op redop
= (nir_op
)nir_intrinsic_reduction_op(instr
);
4989 unsigned cluster_size
= nir_intrinsic_cluster_size(instr
);
4990 if (cluster_size
== 0 || cluster_size
> dispatch_width
)
4991 cluster_size
= dispatch_width
;
4993 /* Figure out the source type */
4994 src
.type
= brw_type_for_nir_type(devinfo
,
4995 (nir_alu_type
)(nir_op_infos
[redop
].input_types
[0] |
4996 nir_src_bit_size(instr
->src
[0])));
4998 fs_reg identity
= brw_nir_reduction_op_identity(bld
, redop
, src
.type
);
4999 opcode brw_op
= brw_op_for_nir_reduction_op(redop
);
5000 brw_conditional_mod cond_mod
= brw_cond_mod_for_nir_reduction_op(redop
);
5002 /* Set up a register for all of our scratching around and initialize it
5003 * to reduction operation's identity value.
5005 fs_reg scan
= bld
.vgrf(src
.type
);
5006 bld
.exec_all().emit(SHADER_OPCODE_SEL_EXEC
, scan
, src
, identity
);
5008 bld
.emit_scan(brw_op
, scan
, cluster_size
, cond_mod
);
5010 dest
.type
= src
.type
;
5011 if (cluster_size
* type_sz(src
.type
) >= REG_SIZE
* 2) {
5012 /* In this case, CLUSTER_BROADCAST instruction isn't needed because
5013 * the distance between clusters is at least 2 GRFs. In this case,
5014 * we don't need the weird striding of the CLUSTER_BROADCAST
5015 * instruction and can just do regular MOVs.
5017 assert((cluster_size
* type_sz(src
.type
)) % (REG_SIZE
* 2) == 0);
5018 const unsigned groups
=
5019 (dispatch_width
* type_sz(src
.type
)) / (REG_SIZE
* 2);
5020 const unsigned group_size
= dispatch_width
/ groups
;
5021 for (unsigned i
= 0; i
< groups
; i
++) {
5022 const unsigned cluster
= (i
* group_size
) / cluster_size
;
5023 const unsigned comp
= cluster
* cluster_size
+ (cluster_size
- 1);
5024 bld
.group(group_size
, i
).MOV(horiz_offset(dest
, i
* group_size
),
5025 component(scan
, comp
));
5028 bld
.emit(SHADER_OPCODE_CLUSTER_BROADCAST
, dest
, scan
,
5029 brw_imm_ud(cluster_size
- 1), brw_imm_ud(cluster_size
));
5034 case nir_intrinsic_inclusive_scan
:
5035 case nir_intrinsic_exclusive_scan
: {
5036 fs_reg src
= get_nir_src(instr
->src
[0]);
5037 nir_op redop
= (nir_op
)nir_intrinsic_reduction_op(instr
);
5039 /* Figure out the source type */
5040 src
.type
= brw_type_for_nir_type(devinfo
,
5041 (nir_alu_type
)(nir_op_infos
[redop
].input_types
[0] |
5042 nir_src_bit_size(instr
->src
[0])));
5044 fs_reg identity
= brw_nir_reduction_op_identity(bld
, redop
, src
.type
);
5045 opcode brw_op
= brw_op_for_nir_reduction_op(redop
);
5046 brw_conditional_mod cond_mod
= brw_cond_mod_for_nir_reduction_op(redop
);
5048 /* Set up a register for all of our scratching around and initialize it
5049 * to reduction operation's identity value.
5051 fs_reg scan
= bld
.vgrf(src
.type
);
5052 const fs_builder allbld
= bld
.exec_all();
5053 allbld
.emit(SHADER_OPCODE_SEL_EXEC
, scan
, src
, identity
);
5055 if (instr
->intrinsic
== nir_intrinsic_exclusive_scan
) {
5056 /* Exclusive scan is a bit harder because we have to do an annoying
5057 * shift of the contents before we can begin. To make things worse,
5058 * we can't do this with a normal stride; we have to use indirects.
5060 fs_reg shifted
= bld
.vgrf(src
.type
);
5061 fs_reg idx
= bld
.vgrf(BRW_REGISTER_TYPE_W
);
5062 allbld
.ADD(idx
, nir_system_values
[SYSTEM_VALUE_SUBGROUP_INVOCATION
],
5064 allbld
.emit(SHADER_OPCODE_SHUFFLE
, shifted
, scan
, idx
);
5065 allbld
.group(1, 0).MOV(component(shifted
, 0), identity
);
5069 bld
.emit_scan(brw_op
, scan
, dispatch_width
, cond_mod
);
5071 bld
.MOV(retype(dest
, src
.type
), scan
);
5075 case nir_intrinsic_begin_invocation_interlock
: {
5076 const fs_builder ubld
= bld
.group(8, 0);
5077 const fs_reg tmp
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
5079 ubld
.emit(SHADER_OPCODE_INTERLOCK
, tmp
, brw_vec8_grf(0, 0))
5080 ->size_written
= 2 * REG_SIZE
;
5084 case nir_intrinsic_end_invocation_interlock
: {
5085 /* For endInvocationInterlock(), we need to insert a memory fence which
5086 * stalls in the shader until the memory transactions prior to that
5087 * fence are complete. This ensures that the shader does not end before
5088 * any writes from its critical section have landed. Otherwise, you can
5089 * end up with a case where the next invocation on that pixel properly
5090 * stalls for previous FS invocation on its pixel to complete but
5091 * doesn't actually wait for the dataport memory transactions from that
5092 * thread to land before submitting its own.
5094 const fs_builder ubld
= bld
.group(8, 0);
5095 const fs_reg tmp
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
5096 ubld
.emit(SHADER_OPCODE_MEMORY_FENCE
, tmp
,
5097 brw_vec8_grf(0, 0), brw_imm_ud(1))
5098 ->size_written
= 2 * REG_SIZE
;
5103 unreachable("unknown intrinsic");
5108 fs_visitor::nir_emit_ssbo_atomic(const fs_builder
&bld
,
5109 int op
, nir_intrinsic_instr
*instr
)
5111 if (stage
== MESA_SHADER_FRAGMENT
)
5112 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
5114 /* The BTI untyped atomic messages only support 32-bit atomics. If you
5115 * just look at the big table of messages in the Vol 7 of the SKL PRM, they
5116 * appear to exist. However, if you look at Vol 2a, there are no message
5117 * descriptors provided for Qword atomic ops except for A64 messages.
5119 assert(nir_dest_bit_size(instr
->dest
) == 32);
5122 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
5123 dest
= get_nir_dest(instr
->dest
);
5125 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
5126 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = get_nir_ssbo_intrinsic_index(bld
, instr
);
5127 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
5128 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
5129 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(op
);
5132 if (op
!= BRW_AOP_INC
&& op
!= BRW_AOP_DEC
&& op
!= BRW_AOP_PREDEC
)
5133 data
= get_nir_src(instr
->src
[2]);
5135 if (op
== BRW_AOP_CMPWR
) {
5136 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5137 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[3]) };
5138 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5141 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
5143 /* Emit the actual atomic operation */
5145 bld
.emit(SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL
,
5146 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
5150 fs_visitor::nir_emit_ssbo_atomic_float(const fs_builder
&bld
,
5151 int op
, nir_intrinsic_instr
*instr
)
5153 if (stage
== MESA_SHADER_FRAGMENT
)
5154 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
5157 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
5158 dest
= get_nir_dest(instr
->dest
);
5160 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
5161 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = get_nir_ssbo_intrinsic_index(bld
, instr
);
5162 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = get_nir_src(instr
->src
[1]);
5163 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
5164 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(op
);
5166 fs_reg data
= get_nir_src(instr
->src
[2]);
5167 if (op
== BRW_AOP_FCMPWR
) {
5168 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5169 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[3]) };
5170 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5173 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
5175 /* Emit the actual atomic operation */
5177 bld
.emit(SHADER_OPCODE_UNTYPED_ATOMIC_FLOAT_LOGICAL
,
5178 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
5182 fs_visitor::nir_emit_shared_atomic(const fs_builder
&bld
,
5183 int op
, nir_intrinsic_instr
*instr
)
5186 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
5187 dest
= get_nir_dest(instr
->dest
);
5189 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
5190 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = brw_imm_ud(GEN7_BTI_SLM
);
5191 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
5192 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(op
);
5195 if (op
!= BRW_AOP_INC
&& op
!= BRW_AOP_DEC
&& op
!= BRW_AOP_PREDEC
)
5196 data
= get_nir_src(instr
->src
[1]);
5197 if (op
== BRW_AOP_CMPWR
) {
5198 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5199 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[2]) };
5200 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5203 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
5205 /* Get the offset */
5206 if (nir_src_is_const(instr
->src
[0])) {
5207 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] =
5208 brw_imm_ud(instr
->const_index
[0] + nir_src_as_uint(instr
->src
[0]));
5210 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = vgrf(glsl_type::uint_type
);
5211 bld
.ADD(srcs
[SURFACE_LOGICAL_SRC_ADDRESS
],
5212 retype(get_nir_src(instr
->src
[0]), BRW_REGISTER_TYPE_UD
),
5213 brw_imm_ud(instr
->const_index
[0]));
5216 /* Emit the actual atomic operation operation */
5218 bld
.emit(SHADER_OPCODE_UNTYPED_ATOMIC_LOGICAL
,
5219 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
5223 fs_visitor::nir_emit_shared_atomic_float(const fs_builder
&bld
,
5224 int op
, nir_intrinsic_instr
*instr
)
5227 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
5228 dest
= get_nir_dest(instr
->dest
);
5230 fs_reg srcs
[SURFACE_LOGICAL_NUM_SRCS
];
5231 srcs
[SURFACE_LOGICAL_SRC_SURFACE
] = brw_imm_ud(GEN7_BTI_SLM
);
5232 srcs
[SURFACE_LOGICAL_SRC_IMM_DIMS
] = brw_imm_ud(1);
5233 srcs
[SURFACE_LOGICAL_SRC_IMM_ARG
] = brw_imm_ud(op
);
5235 fs_reg data
= get_nir_src(instr
->src
[1]);
5236 if (op
== BRW_AOP_FCMPWR
) {
5237 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5238 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[2]) };
5239 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5242 srcs
[SURFACE_LOGICAL_SRC_DATA
] = data
;
5244 /* Get the offset */
5245 if (nir_src_is_const(instr
->src
[0])) {
5246 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] =
5247 brw_imm_ud(instr
->const_index
[0] + nir_src_as_uint(instr
->src
[0]));
5249 srcs
[SURFACE_LOGICAL_SRC_ADDRESS
] = vgrf(glsl_type::uint_type
);
5250 bld
.ADD(srcs
[SURFACE_LOGICAL_SRC_ADDRESS
],
5251 retype(get_nir_src(instr
->src
[0]), BRW_REGISTER_TYPE_UD
),
5252 brw_imm_ud(instr
->const_index
[0]));
5255 /* Emit the actual atomic operation operation */
5257 bld
.emit(SHADER_OPCODE_UNTYPED_ATOMIC_FLOAT_LOGICAL
,
5258 dest
, srcs
, SURFACE_LOGICAL_NUM_SRCS
);
5262 fs_visitor::nir_emit_global_atomic(const fs_builder
&bld
,
5263 int op
, nir_intrinsic_instr
*instr
)
5265 if (stage
== MESA_SHADER_FRAGMENT
)
5266 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
5269 if (nir_intrinsic_infos
[instr
->intrinsic
].has_dest
)
5270 dest
= get_nir_dest(instr
->dest
);
5272 fs_reg addr
= get_nir_src(instr
->src
[0]);
5275 if (op
!= BRW_AOP_INC
&& op
!= BRW_AOP_DEC
&& op
!= BRW_AOP_PREDEC
)
5276 data
= get_nir_src(instr
->src
[1]);
5278 if (op
== BRW_AOP_CMPWR
) {
5279 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5280 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[2]) };
5281 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5285 if (nir_dest_bit_size(instr
->dest
) == 64) {
5286 bld
.emit(SHADER_OPCODE_A64_UNTYPED_ATOMIC_INT64_LOGICAL
,
5287 dest
, addr
, data
, brw_imm_ud(op
));
5289 assert(nir_dest_bit_size(instr
->dest
) == 32);
5290 bld
.emit(SHADER_OPCODE_A64_UNTYPED_ATOMIC_LOGICAL
,
5291 dest
, addr
, data
, brw_imm_ud(op
));
5296 fs_visitor::nir_emit_global_atomic_float(const fs_builder
&bld
,
5297 int op
, nir_intrinsic_instr
*instr
)
5299 if (stage
== MESA_SHADER_FRAGMENT
)
5300 brw_wm_prog_data(prog_data
)->has_side_effects
= true;
5302 assert(nir_intrinsic_infos
[instr
->intrinsic
].has_dest
);
5303 fs_reg dest
= get_nir_dest(instr
->dest
);
5305 fs_reg addr
= get_nir_src(instr
->src
[0]);
5307 assert(op
!= BRW_AOP_INC
&& op
!= BRW_AOP_DEC
&& op
!= BRW_AOP_PREDEC
);
5308 fs_reg data
= get_nir_src(instr
->src
[1]);
5310 if (op
== BRW_AOP_FCMPWR
) {
5311 fs_reg tmp
= bld
.vgrf(data
.type
, 2);
5312 fs_reg sources
[2] = { data
, get_nir_src(instr
->src
[2]) };
5313 bld
.LOAD_PAYLOAD(tmp
, sources
, 2, 0);
5317 bld
.emit(SHADER_OPCODE_A64_UNTYPED_ATOMIC_LOGICAL
,
5318 dest
, addr
, data
, brw_imm_ud(op
));
5322 fs_visitor::nir_emit_texture(const fs_builder
&bld
, nir_tex_instr
*instr
)
5324 unsigned texture
= instr
->texture_index
;
5325 unsigned sampler
= instr
->sampler_index
;
5327 fs_reg srcs
[TEX_LOGICAL_NUM_SRCS
];
5329 srcs
[TEX_LOGICAL_SRC_SURFACE
] = brw_imm_ud(texture
);
5330 srcs
[TEX_LOGICAL_SRC_SAMPLER
] = brw_imm_ud(sampler
);
5332 int lod_components
= 0;
5334 /* The hardware requires a LOD for buffer textures */
5335 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_BUF
)
5336 srcs
[TEX_LOGICAL_SRC_LOD
] = brw_imm_d(0);
5338 uint32_t header_bits
= 0;
5339 for (unsigned i
= 0; i
< instr
->num_srcs
; i
++) {
5340 fs_reg src
= get_nir_src(instr
->src
[i
].src
);
5341 switch (instr
->src
[i
].src_type
) {
5342 case nir_tex_src_bias
:
5343 srcs
[TEX_LOGICAL_SRC_LOD
] =
5344 retype(get_nir_src_imm(instr
->src
[i
].src
), BRW_REGISTER_TYPE_F
);
5346 case nir_tex_src_comparator
:
5347 srcs
[TEX_LOGICAL_SRC_SHADOW_C
] = retype(src
, BRW_REGISTER_TYPE_F
);
5349 case nir_tex_src_coord
:
5350 switch (instr
->op
) {
5352 case nir_texop_txf_ms
:
5353 case nir_texop_txf_ms_mcs
:
5354 case nir_texop_samples_identical
:
5355 srcs
[TEX_LOGICAL_SRC_COORDINATE
] = retype(src
, BRW_REGISTER_TYPE_D
);
5358 srcs
[TEX_LOGICAL_SRC_COORDINATE
] = retype(src
, BRW_REGISTER_TYPE_F
);
5362 case nir_tex_src_ddx
:
5363 srcs
[TEX_LOGICAL_SRC_LOD
] = retype(src
, BRW_REGISTER_TYPE_F
);
5364 lod_components
= nir_tex_instr_src_size(instr
, i
);
5366 case nir_tex_src_ddy
:
5367 srcs
[TEX_LOGICAL_SRC_LOD2
] = retype(src
, BRW_REGISTER_TYPE_F
);
5369 case nir_tex_src_lod
:
5370 switch (instr
->op
) {
5372 srcs
[TEX_LOGICAL_SRC_LOD
] =
5373 retype(get_nir_src_imm(instr
->src
[i
].src
), BRW_REGISTER_TYPE_UD
);
5376 srcs
[TEX_LOGICAL_SRC_LOD
] =
5377 retype(get_nir_src_imm(instr
->src
[i
].src
), BRW_REGISTER_TYPE_D
);
5380 srcs
[TEX_LOGICAL_SRC_LOD
] =
5381 retype(get_nir_src_imm(instr
->src
[i
].src
), BRW_REGISTER_TYPE_F
);
5385 case nir_tex_src_min_lod
:
5386 srcs
[TEX_LOGICAL_SRC_MIN_LOD
] =
5387 retype(get_nir_src_imm(instr
->src
[i
].src
), BRW_REGISTER_TYPE_F
);
5389 case nir_tex_src_ms_index
:
5390 srcs
[TEX_LOGICAL_SRC_SAMPLE_INDEX
] = retype(src
, BRW_REGISTER_TYPE_UD
);
5393 case nir_tex_src_offset
: {
5394 uint32_t offset_bits
= 0;
5395 if (brw_texture_offset(instr
, i
, &offset_bits
)) {
5396 header_bits
|= offset_bits
;
5398 srcs
[TEX_LOGICAL_SRC_TG4_OFFSET
] =
5399 retype(src
, BRW_REGISTER_TYPE_D
);
5404 case nir_tex_src_projector
:
5405 unreachable("should be lowered");
5407 case nir_tex_src_texture_offset
: {
5408 /* Emit code to evaluate the actual indexing expression */
5409 fs_reg tmp
= vgrf(glsl_type::uint_type
);
5410 bld
.ADD(tmp
, src
, brw_imm_ud(texture
));
5411 srcs
[TEX_LOGICAL_SRC_SURFACE
] = bld
.emit_uniformize(tmp
);
5415 case nir_tex_src_sampler_offset
: {
5416 /* Emit code to evaluate the actual indexing expression */
5417 fs_reg tmp
= vgrf(glsl_type::uint_type
);
5418 bld
.ADD(tmp
, src
, brw_imm_ud(sampler
));
5419 srcs
[TEX_LOGICAL_SRC_SAMPLER
] = bld
.emit_uniformize(tmp
);
5423 case nir_tex_src_texture_handle
:
5424 assert(nir_tex_instr_src_index(instr
, nir_tex_src_texture_offset
) == -1);
5425 srcs
[TEX_LOGICAL_SRC_SURFACE
] = fs_reg();
5426 srcs
[TEX_LOGICAL_SRC_SURFACE_HANDLE
] = bld
.emit_uniformize(src
);
5429 case nir_tex_src_sampler_handle
:
5430 assert(nir_tex_instr_src_index(instr
, nir_tex_src_sampler_offset
) == -1);
5431 srcs
[TEX_LOGICAL_SRC_SAMPLER
] = fs_reg();
5432 srcs
[TEX_LOGICAL_SRC_SAMPLER_HANDLE
] = bld
.emit_uniformize(src
);
5435 case nir_tex_src_ms_mcs
:
5436 assert(instr
->op
== nir_texop_txf_ms
);
5437 srcs
[TEX_LOGICAL_SRC_MCS
] = retype(src
, BRW_REGISTER_TYPE_D
);
5440 case nir_tex_src_plane
: {
5441 const uint32_t plane
= nir_src_as_uint(instr
->src
[i
].src
);
5442 const uint32_t texture_index
=
5443 instr
->texture_index
+
5444 stage_prog_data
->binding_table
.plane_start
[plane
] -
5445 stage_prog_data
->binding_table
.texture_start
;
5447 srcs
[TEX_LOGICAL_SRC_SURFACE
] = brw_imm_ud(texture_index
);
5452 unreachable("unknown texture source");
5456 if (srcs
[TEX_LOGICAL_SRC_MCS
].file
== BAD_FILE
&&
5457 (instr
->op
== nir_texop_txf_ms
||
5458 instr
->op
== nir_texop_samples_identical
)) {
5459 if (devinfo
->gen
>= 7 &&
5460 key_tex
->compressed_multisample_layout_mask
& (1 << texture
)) {
5461 srcs
[TEX_LOGICAL_SRC_MCS
] =
5462 emit_mcs_fetch(srcs
[TEX_LOGICAL_SRC_COORDINATE
],
5463 instr
->coord_components
,
5464 srcs
[TEX_LOGICAL_SRC_SURFACE
],
5465 srcs
[TEX_LOGICAL_SRC_SURFACE_HANDLE
]);
5467 srcs
[TEX_LOGICAL_SRC_MCS
] = brw_imm_ud(0u);
5471 srcs
[TEX_LOGICAL_SRC_COORD_COMPONENTS
] = brw_imm_d(instr
->coord_components
);
5472 srcs
[TEX_LOGICAL_SRC_GRAD_COMPONENTS
] = brw_imm_d(lod_components
);
5475 switch (instr
->op
) {
5477 opcode
= SHADER_OPCODE_TEX_LOGICAL
;
5480 opcode
= FS_OPCODE_TXB_LOGICAL
;
5483 opcode
= SHADER_OPCODE_TXL_LOGICAL
;
5486 opcode
= SHADER_OPCODE_TXD_LOGICAL
;
5489 opcode
= SHADER_OPCODE_TXF_LOGICAL
;
5491 case nir_texop_txf_ms
:
5492 if ((key_tex
->msaa_16
& (1 << sampler
)))
5493 opcode
= SHADER_OPCODE_TXF_CMS_W_LOGICAL
;
5495 opcode
= SHADER_OPCODE_TXF_CMS_LOGICAL
;
5497 case nir_texop_txf_ms_mcs
:
5498 opcode
= SHADER_OPCODE_TXF_MCS_LOGICAL
;
5500 case nir_texop_query_levels
:
5502 opcode
= SHADER_OPCODE_TXS_LOGICAL
;
5505 opcode
= SHADER_OPCODE_LOD_LOGICAL
;
5508 if (srcs
[TEX_LOGICAL_SRC_TG4_OFFSET
].file
!= BAD_FILE
)
5509 opcode
= SHADER_OPCODE_TG4_OFFSET_LOGICAL
;
5511 opcode
= SHADER_OPCODE_TG4_LOGICAL
;
5513 case nir_texop_texture_samples
:
5514 opcode
= SHADER_OPCODE_SAMPLEINFO_LOGICAL
;
5516 case nir_texop_samples_identical
: {
5517 fs_reg dst
= retype(get_nir_dest(instr
->dest
), BRW_REGISTER_TYPE_D
);
5519 /* If mcs is an immediate value, it means there is no MCS. In that case
5520 * just return false.
5522 if (srcs
[TEX_LOGICAL_SRC_MCS
].file
== BRW_IMMEDIATE_VALUE
) {
5523 bld
.MOV(dst
, brw_imm_ud(0u));
5524 } else if ((key_tex
->msaa_16
& (1 << sampler
))) {
5525 fs_reg tmp
= vgrf(glsl_type::uint_type
);
5526 bld
.OR(tmp
, srcs
[TEX_LOGICAL_SRC_MCS
],
5527 offset(srcs
[TEX_LOGICAL_SRC_MCS
], bld
, 1));
5528 bld
.CMP(dst
, tmp
, brw_imm_ud(0u), BRW_CONDITIONAL_EQ
);
5530 bld
.CMP(dst
, srcs
[TEX_LOGICAL_SRC_MCS
], brw_imm_ud(0u),
5531 BRW_CONDITIONAL_EQ
);
5536 unreachable("unknown texture opcode");
5539 if (instr
->op
== nir_texop_tg4
) {
5540 if (instr
->component
== 1 &&
5541 key_tex
->gather_channel_quirk_mask
& (1 << texture
)) {
5542 /* gather4 sampler is broken for green channel on RG32F --
5543 * we must ask for blue instead.
5545 header_bits
|= 2 << 16;
5547 header_bits
|= instr
->component
<< 16;
5551 fs_reg dst
= bld
.vgrf(brw_type_for_nir_type(devinfo
, instr
->dest_type
), 4);
5552 fs_inst
*inst
= bld
.emit(opcode
, dst
, srcs
, ARRAY_SIZE(srcs
));
5553 inst
->offset
= header_bits
;
5555 const unsigned dest_size
= nir_tex_instr_dest_size(instr
);
5556 if (devinfo
->gen
>= 9 &&
5557 instr
->op
!= nir_texop_tg4
&& instr
->op
!= nir_texop_query_levels
) {
5558 unsigned write_mask
= instr
->dest
.is_ssa
?
5559 nir_ssa_def_components_read(&instr
->dest
.ssa
):
5560 (1 << dest_size
) - 1;
5561 assert(write_mask
!= 0); /* dead code should have been eliminated */
5562 inst
->size_written
= util_last_bit(write_mask
) *
5563 inst
->dst
.component_size(inst
->exec_size
);
5565 inst
->size_written
= 4 * inst
->dst
.component_size(inst
->exec_size
);
5568 if (srcs
[TEX_LOGICAL_SRC_SHADOW_C
].file
!= BAD_FILE
)
5569 inst
->shadow_compare
= true;
5571 if (instr
->op
== nir_texop_tg4
&& devinfo
->gen
== 6)
5572 emit_gen6_gather_wa(key_tex
->gen6_gather_wa
[texture
], dst
);
5575 for (unsigned i
= 0; i
< dest_size
; i
++)
5576 nir_dest
[i
] = offset(dst
, bld
, i
);
5578 if (instr
->op
== nir_texop_query_levels
) {
5579 /* # levels is in .w */
5580 nir_dest
[0] = offset(dst
, bld
, 3);
5581 } else if (instr
->op
== nir_texop_txs
&&
5582 dest_size
>= 3 && devinfo
->gen
< 7) {
5583 /* Gen4-6 return 0 instead of 1 for single layer surfaces. */
5584 fs_reg depth
= offset(dst
, bld
, 2);
5585 nir_dest
[2] = vgrf(glsl_type::int_type
);
5586 bld
.emit_minmax(nir_dest
[2], depth
, brw_imm_d(1), BRW_CONDITIONAL_GE
);
5589 bld
.LOAD_PAYLOAD(get_nir_dest(instr
->dest
), nir_dest
, dest_size
, 0);
5593 fs_visitor::nir_emit_jump(const fs_builder
&bld
, nir_jump_instr
*instr
)
5595 switch (instr
->type
) {
5596 case nir_jump_break
:
5597 bld
.emit(BRW_OPCODE_BREAK
);
5599 case nir_jump_continue
:
5600 bld
.emit(BRW_OPCODE_CONTINUE
);
5602 case nir_jump_return
:
5604 unreachable("unknown jump");
5609 * This helper takes a source register and un/shuffles it into the destination
5612 * If source type size is smaller than destination type size the operation
5613 * needed is a component shuffle. The opposite case would be an unshuffle. If
5614 * source/destination type size is equal a shuffle is done that would be
5615 * equivalent to a simple MOV.
5617 * For example, if source is a 16-bit type and destination is 32-bit. A 3
5618 * components .xyz 16-bit vector on SIMD8 would be.
5620 * |x1|x2|x3|x4|x5|x6|x7|x8|y1|y2|y3|y4|y5|y6|y7|y8|
5621 * |z1|z2|z3|z4|z5|z6|z7|z8| | | | | | | | |
5623 * This helper will return the following 2 32-bit components with the 16-bit
5626 * |x1 y1|x2 y2|x3 y3|x4 y4|x5 y5|x6 y6|x7 y7|x8 y8|
5627 * |z1 |z2 |z3 |z4 |z5 |z6 |z7 |z8 |
5629 * For unshuffle, the example would be the opposite, a 64-bit type source
5630 * and a 32-bit destination. A 2 component .xy 64-bit vector on SIMD8
5633 * | x1l x1h | x2l x2h | x3l x3h | x4l x4h |
5634 * | x5l x5h | x6l x6h | x7l x7h | x8l x8h |
5635 * | y1l y1h | y2l y2h | y3l y3h | y4l y4h |
5636 * | y5l y5h | y6l y6h | y7l y7h | y8l y8h |
5638 * The returned result would be the following 4 32-bit components unshuffled:
5640 * | x1l | x2l | x3l | x4l | x5l | x6l | x7l | x8l |
5641 * | x1h | x2h | x3h | x4h | x5h | x6h | x7h | x8h |
5642 * | y1l | y2l | y3l | y4l | y5l | y6l | y7l | y8l |
5643 * | y1h | y2h | y3h | y4h | y5h | y6h | y7h | y8h |
5645 * - Source and destination register must not be overlapped.
5646 * - components units are measured in terms of the smaller type between
5647 * source and destination because we are un/shuffling the smaller
5648 * components from/into the bigger ones.
5649 * - first_component parameter allows skipping source components.
5652 shuffle_src_to_dst(const fs_builder
&bld
,
5655 uint32_t first_component
,
5656 uint32_t components
)
5658 if (type_sz(src
.type
) == type_sz(dst
.type
)) {
5659 assert(!regions_overlap(dst
,
5660 type_sz(dst
.type
) * bld
.dispatch_width() * components
,
5661 offset(src
, bld
, first_component
),
5662 type_sz(src
.type
) * bld
.dispatch_width() * components
));
5663 for (unsigned i
= 0; i
< components
; i
++) {
5664 bld
.MOV(retype(offset(dst
, bld
, i
), src
.type
),
5665 offset(src
, bld
, i
+ first_component
));
5667 } else if (type_sz(src
.type
) < type_sz(dst
.type
)) {
5668 /* Source is shuffled into destination */
5669 unsigned size_ratio
= type_sz(dst
.type
) / type_sz(src
.type
);
5670 assert(!regions_overlap(dst
,
5671 type_sz(dst
.type
) * bld
.dispatch_width() *
5672 DIV_ROUND_UP(components
, size_ratio
),
5673 offset(src
, bld
, first_component
),
5674 type_sz(src
.type
) * bld
.dispatch_width() * components
));
5676 brw_reg_type shuffle_type
=
5677 brw_reg_type_from_bit_size(8 * type_sz(src
.type
),
5678 BRW_REGISTER_TYPE_D
);
5679 for (unsigned i
= 0; i
< components
; i
++) {
5680 fs_reg shuffle_component_i
=
5681 subscript(offset(dst
, bld
, i
/ size_ratio
),
5682 shuffle_type
, i
% size_ratio
);
5683 bld
.MOV(shuffle_component_i
,
5684 retype(offset(src
, bld
, i
+ first_component
), shuffle_type
));
5687 /* Source is unshuffled into destination */
5688 unsigned size_ratio
= type_sz(src
.type
) / type_sz(dst
.type
);
5689 assert(!regions_overlap(dst
,
5690 type_sz(dst
.type
) * bld
.dispatch_width() * components
,
5691 offset(src
, bld
, first_component
/ size_ratio
),
5692 type_sz(src
.type
) * bld
.dispatch_width() *
5693 DIV_ROUND_UP(components
+ (first_component
% size_ratio
),
5696 brw_reg_type shuffle_type
=
5697 brw_reg_type_from_bit_size(8 * type_sz(dst
.type
),
5698 BRW_REGISTER_TYPE_D
);
5699 for (unsigned i
= 0; i
< components
; i
++) {
5700 fs_reg shuffle_component_i
=
5701 subscript(offset(src
, bld
, (first_component
+ i
) / size_ratio
),
5702 shuffle_type
, (first_component
+ i
) % size_ratio
);
5703 bld
.MOV(retype(offset(dst
, bld
, i
), shuffle_type
),
5704 shuffle_component_i
);
5710 shuffle_from_32bit_read(const fs_builder
&bld
,
5713 uint32_t first_component
,
5714 uint32_t components
)
5716 assert(type_sz(src
.type
) == 4);
5718 /* This function takes components in units of the destination type while
5719 * shuffle_src_to_dst takes components in units of the smallest type
5721 if (type_sz(dst
.type
) > 4) {
5722 assert(type_sz(dst
.type
) == 8);
5723 first_component
*= 2;
5727 shuffle_src_to_dst(bld
, dst
, src
, first_component
, components
);
5731 shuffle_for_32bit_write(const fs_builder
&bld
,
5733 uint32_t first_component
,
5734 uint32_t components
)
5736 fs_reg dst
= bld
.vgrf(BRW_REGISTER_TYPE_D
,
5737 DIV_ROUND_UP (components
* type_sz(src
.type
), 4));
5738 /* This function takes components in units of the source type while
5739 * shuffle_src_to_dst takes components in units of the smallest type
5741 if (type_sz(src
.type
) > 4) {
5742 assert(type_sz(src
.type
) == 8);
5743 first_component
*= 2;
5747 shuffle_src_to_dst(bld
, dst
, src
, first_component
, components
);
5753 setup_imm_df(const fs_builder
&bld
, double v
)
5755 const struct gen_device_info
*devinfo
= bld
.shader
->devinfo
;
5756 assert(devinfo
->gen
>= 7);
5758 if (devinfo
->gen
>= 8)
5759 return brw_imm_df(v
);
5761 /* gen7.5 does not support DF immediates straighforward but the DIM
5762 * instruction allows to set the 64-bit immediate value.
5764 if (devinfo
->is_haswell
) {
5765 const fs_builder ubld
= bld
.exec_all().group(1, 0);
5766 fs_reg dst
= ubld
.vgrf(BRW_REGISTER_TYPE_DF
, 1);
5767 ubld
.DIM(dst
, brw_imm_df(v
));
5768 return component(dst
, 0);
5771 /* gen7 does not support DF immediates, so we generate a 64-bit constant by
5772 * writing the low 32-bit of the constant to suboffset 0 of a VGRF and
5773 * the high 32-bit to suboffset 4 and then applying a stride of 0.
5775 * Alternatively, we could also produce a normal VGRF (without stride 0)
5776 * by writing to all the channels in the VGRF, however, that would hit the
5777 * gen7 bug where we have to split writes that span more than 1 register
5778 * into instructions with a width of 4 (otherwise the write to the second
5779 * register written runs into an execmask hardware bug) which isn't very
5792 const fs_builder ubld
= bld
.exec_all().group(1, 0);
5793 const fs_reg tmp
= ubld
.vgrf(BRW_REGISTER_TYPE_UD
, 2);
5794 ubld
.MOV(tmp
, brw_imm_ud(di
.i1
));
5795 ubld
.MOV(horiz_offset(tmp
, 1), brw_imm_ud(di
.i2
));
5797 return component(retype(tmp
, BRW_REGISTER_TYPE_DF
), 0);
5801 setup_imm_b(const fs_builder
&bld
, int8_t v
)
5803 const fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_B
);
5804 bld
.MOV(tmp
, brw_imm_w(v
));
5809 setup_imm_ub(const fs_builder
&bld
, uint8_t v
)
5811 const fs_reg tmp
= bld
.vgrf(BRW_REGISTER_TYPE_UB
);
5812 bld
.MOV(tmp
, brw_imm_uw(v
));