2 * Copyright © 2014-2015 Broadcom
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
27 #include "nir_control_flow.h"
28 #include "util/bitscan.h"
29 #include "util/half_float.h"
33 typedef struct nir_builder
{
36 /* Whether new ALU instructions will be marked "exact" */
40 nir_function_impl
*impl
;
44 nir_builder_init(nir_builder
*build
, nir_function_impl
*impl
)
46 memset(build
, 0, sizeof(*build
));
49 build
->shader
= impl
->function
->shader
;
53 nir_builder_init_simple_shader(nir_builder
*build
, void *mem_ctx
,
54 gl_shader_stage stage
,
55 const nir_shader_compiler_options
*options
)
57 build
->shader
= nir_shader_create(mem_ctx
, stage
, options
, NULL
);
58 nir_function
*func
= nir_function_create(build
->shader
, "main");
59 func
->is_entrypoint
= true;
61 build
->impl
= nir_function_impl_create(func
);
62 build
->cursor
= nir_after_cf_list(&build
->impl
->body
);
66 nir_builder_instr_insert(nir_builder
*build
, nir_instr
*instr
)
68 nir_instr_insert(build
->cursor
, instr
);
70 /* Move the cursor forward. */
71 build
->cursor
= nir_after_instr(instr
);
74 static inline nir_instr
*
75 nir_builder_last_instr(nir_builder
*build
)
77 assert(build
->cursor
.option
== nir_cursor_after_instr
);
78 return build
->cursor
.instr
;
82 nir_builder_cf_insert(nir_builder
*build
, nir_cf_node
*cf
)
84 nir_cf_node_insert(build
->cursor
, cf
);
88 nir_builder_is_inside_cf(nir_builder
*build
, nir_cf_node
*cf_node
)
90 nir_block
*block
= nir_cursor_current_block(build
->cursor
);
91 for (nir_cf_node
*n
= &block
->cf_node
; n
; n
= n
->parent
) {
98 static inline nir_if
*
99 nir_push_if(nir_builder
*build
, nir_ssa_def
*condition
)
101 nir_if
*nif
= nir_if_create(build
->shader
);
102 nif
->condition
= nir_src_for_ssa(condition
);
103 nir_builder_cf_insert(build
, &nif
->cf_node
);
104 build
->cursor
= nir_before_cf_list(&nif
->then_list
);
108 static inline nir_if
*
109 nir_push_else(nir_builder
*build
, nir_if
*nif
)
112 assert(nir_builder_is_inside_cf(build
, &nif
->cf_node
));
114 nir_block
*block
= nir_cursor_current_block(build
->cursor
);
115 nif
= nir_cf_node_as_if(block
->cf_node
.parent
);
117 build
->cursor
= nir_before_cf_list(&nif
->else_list
);
122 nir_pop_if(nir_builder
*build
, nir_if
*nif
)
125 assert(nir_builder_is_inside_cf(build
, &nif
->cf_node
));
127 nir_block
*block
= nir_cursor_current_block(build
->cursor
);
128 nif
= nir_cf_node_as_if(block
->cf_node
.parent
);
130 build
->cursor
= nir_after_cf_node(&nif
->cf_node
);
133 static inline nir_ssa_def
*
134 nir_if_phi(nir_builder
*build
, nir_ssa_def
*then_def
, nir_ssa_def
*else_def
)
136 nir_block
*block
= nir_cursor_current_block(build
->cursor
);
137 nir_if
*nif
= nir_cf_node_as_if(nir_cf_node_prev(&block
->cf_node
));
139 nir_phi_instr
*phi
= nir_phi_instr_create(build
->shader
);
141 nir_phi_src
*src
= ralloc(phi
, nir_phi_src
);
142 src
->pred
= nir_if_last_then_block(nif
);
143 src
->src
= nir_src_for_ssa(then_def
);
144 exec_list_push_tail(&phi
->srcs
, &src
->node
);
146 src
= ralloc(phi
, nir_phi_src
);
147 src
->pred
= nir_if_last_else_block(nif
);
148 src
->src
= nir_src_for_ssa(else_def
);
149 exec_list_push_tail(&phi
->srcs
, &src
->node
);
151 assert(then_def
->num_components
== else_def
->num_components
);
152 assert(then_def
->bit_size
== else_def
->bit_size
);
153 nir_ssa_dest_init(&phi
->instr
, &phi
->dest
,
154 then_def
->num_components
, then_def
->bit_size
, NULL
);
156 nir_builder_instr_insert(build
, &phi
->instr
);
158 return &phi
->dest
.ssa
;
161 static inline nir_loop
*
162 nir_push_loop(nir_builder
*build
)
164 nir_loop
*loop
= nir_loop_create(build
->shader
);
165 nir_builder_cf_insert(build
, &loop
->cf_node
);
166 build
->cursor
= nir_before_cf_list(&loop
->body
);
171 nir_pop_loop(nir_builder
*build
, nir_loop
*loop
)
174 assert(nir_builder_is_inside_cf(build
, &loop
->cf_node
));
176 nir_block
*block
= nir_cursor_current_block(build
->cursor
);
177 loop
= nir_cf_node_as_loop(block
->cf_node
.parent
);
179 build
->cursor
= nir_after_cf_node(&loop
->cf_node
);
182 static inline nir_ssa_def
*
183 nir_ssa_undef(nir_builder
*build
, unsigned num_components
, unsigned bit_size
)
185 nir_ssa_undef_instr
*undef
=
186 nir_ssa_undef_instr_create(build
->shader
, num_components
, bit_size
);
190 nir_instr_insert(nir_before_cf_list(&build
->impl
->body
), &undef
->instr
);
195 static inline nir_ssa_def
*
196 nir_build_imm(nir_builder
*build
, unsigned num_components
,
197 unsigned bit_size
, nir_const_value value
)
199 nir_load_const_instr
*load_const
=
200 nir_load_const_instr_create(build
->shader
, num_components
, bit_size
);
204 load_const
->value
= value
;
206 nir_builder_instr_insert(build
, &load_const
->instr
);
208 return &load_const
->def
;
211 static inline nir_ssa_def
*
212 nir_imm_bool(nir_builder
*build
, bool x
)
216 memset(&v
, 0, sizeof(v
));
219 return nir_build_imm(build
, 1, 1, v
);
222 static inline nir_ssa_def
*
223 nir_imm_true(nir_builder
*build
)
225 return nir_imm_bool(build
, true);
228 static inline nir_ssa_def
*
229 nir_imm_false(nir_builder
*build
)
231 return nir_imm_bool(build
, false);
234 static inline nir_ssa_def
*
235 nir_imm_float16(nir_builder
*build
, float x
)
239 memset(&v
, 0, sizeof(v
));
240 v
.u16
[0] = _mesa_float_to_half(x
);
242 return nir_build_imm(build
, 1, 16, v
);
245 static inline nir_ssa_def
*
246 nir_imm_float(nir_builder
*build
, float x
)
250 memset(&v
, 0, sizeof(v
));
253 return nir_build_imm(build
, 1, 32, v
);
256 static inline nir_ssa_def
*
257 nir_imm_double(nir_builder
*build
, double x
)
261 memset(&v
, 0, sizeof(v
));
264 return nir_build_imm(build
, 1, 64, v
);
267 static inline nir_ssa_def
*
268 nir_imm_floatN_t(nir_builder
*build
, double x
, unsigned bit_size
)
272 return nir_imm_float16(build
, x
);
274 return nir_imm_float(build
, x
);
276 return nir_imm_double(build
, x
);
279 unreachable("unknown float immediate bit size");
282 static inline nir_ssa_def
*
283 nir_imm_vec4(nir_builder
*build
, float x
, float y
, float z
, float w
)
287 memset(&v
, 0, sizeof(v
));
293 return nir_build_imm(build
, 4, 32, v
);
296 static inline nir_ssa_def
*
297 nir_imm_ivec2(nir_builder
*build
, int x
, int y
)
301 memset(&v
, 0, sizeof(v
));
305 return nir_build_imm(build
, 2, 32, v
);
308 static inline nir_ssa_def
*
309 nir_imm_int(nir_builder
*build
, int x
)
313 memset(&v
, 0, sizeof(v
));
316 return nir_build_imm(build
, 1, 32, v
);
319 static inline nir_ssa_def
*
320 nir_imm_int64(nir_builder
*build
, int64_t x
)
324 memset(&v
, 0, sizeof(v
));
327 return nir_build_imm(build
, 1, 64, v
);
330 static inline nir_ssa_def
*
331 nir_imm_intN_t(nir_builder
*build
, uint64_t x
, unsigned bit_size
)
335 memset(&v
, 0, sizeof(v
));
336 assert(bit_size
<= 64);
340 v
.i64
[0] = x
& (~0ull >> (64 - bit_size
));
342 return nir_build_imm(build
, 1, bit_size
, v
);
345 static inline nir_ssa_def
*
346 nir_imm_ivec4(nir_builder
*build
, int x
, int y
, int z
, int w
)
350 memset(&v
, 0, sizeof(v
));
356 return nir_build_imm(build
, 4, 32, v
);
359 static inline nir_ssa_def
*
360 nir_imm_boolN_t(nir_builder
*build
, bool x
, unsigned bit_size
)
362 /* We use a 0/-1 convention for all booleans regardless of size */
363 return nir_imm_intN_t(build
, -(int)x
, bit_size
);
366 static inline nir_ssa_def
*
367 nir_build_alu(nir_builder
*build
, nir_op op
, nir_ssa_def
*src0
,
368 nir_ssa_def
*src1
, nir_ssa_def
*src2
, nir_ssa_def
*src3
)
370 const nir_op_info
*op_info
= &nir_op_infos
[op
];
371 nir_alu_instr
*instr
= nir_alu_instr_create(build
->shader
, op
);
375 instr
->exact
= build
->exact
;
377 instr
->src
[0].src
= nir_src_for_ssa(src0
);
379 instr
->src
[1].src
= nir_src_for_ssa(src1
);
381 instr
->src
[2].src
= nir_src_for_ssa(src2
);
383 instr
->src
[3].src
= nir_src_for_ssa(src3
);
385 /* Guess the number of components the destination temporary should have
386 * based on our input sizes, if it's not fixed for the op.
388 unsigned num_components
= op_info
->output_size
;
389 if (num_components
== 0) {
390 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
391 if (op_info
->input_sizes
[i
] == 0)
392 num_components
= MAX2(num_components
,
393 instr
->src
[i
].src
.ssa
->num_components
);
396 assert(num_components
!= 0);
398 /* Figure out the bitwidth based on the source bitwidth if the instruction
401 unsigned bit_size
= nir_alu_type_get_type_size(op_info
->output_type
);
403 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
404 unsigned src_bit_size
= instr
->src
[i
].src
.ssa
->bit_size
;
405 if (nir_alu_type_get_type_size(op_info
->input_types
[i
]) == 0) {
407 assert(src_bit_size
== bit_size
);
409 bit_size
= src_bit_size
;
411 assert(src_bit_size
==
412 nir_alu_type_get_type_size(op_info
->input_types
[i
]));
417 /* When in doubt, assume 32. */
421 /* Make sure we don't swizzle from outside of our source vector (like if a
422 * scalar value was passed into a multiply with a vector).
424 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
425 for (unsigned j
= instr
->src
[i
].src
.ssa
->num_components
;
426 j
< NIR_MAX_VEC_COMPONENTS
; j
++) {
427 instr
->src
[i
].swizzle
[j
] = instr
->src
[i
].src
.ssa
->num_components
- 1;
431 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
.dest
, num_components
,
433 instr
->dest
.write_mask
= (1 << num_components
) - 1;
435 nir_builder_instr_insert(build
, &instr
->instr
);
437 return &instr
->dest
.dest
.ssa
;
440 #include "nir_builder_opcodes.h"
442 static inline nir_ssa_def
*
443 nir_vec(nir_builder
*build
, nir_ssa_def
**comp
, unsigned num_components
)
445 switch (num_components
) {
447 return nir_vec4(build
, comp
[0], comp
[1], comp
[2], comp
[3]);
449 return nir_vec3(build
, comp
[0], comp
[1], comp
[2]);
451 return nir_vec2(build
, comp
[0], comp
[1]);
455 unreachable("bad component count");
461 * Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
463 static inline nir_ssa_def
*
464 nir_fmov_alu(nir_builder
*build
, nir_alu_src src
, unsigned num_components
)
466 nir_alu_instr
*mov
= nir_alu_instr_create(build
->shader
, nir_op_fmov
);
467 nir_ssa_dest_init(&mov
->instr
, &mov
->dest
.dest
, num_components
,
468 nir_src_bit_size(src
.src
), NULL
);
469 mov
->exact
= build
->exact
;
470 mov
->dest
.write_mask
= (1 << num_components
) - 1;
472 nir_builder_instr_insert(build
, &mov
->instr
);
474 return &mov
->dest
.dest
.ssa
;
477 static inline nir_ssa_def
*
478 nir_imov_alu(nir_builder
*build
, nir_alu_src src
, unsigned num_components
)
480 nir_alu_instr
*mov
= nir_alu_instr_create(build
->shader
, nir_op_imov
);
481 nir_ssa_dest_init(&mov
->instr
, &mov
->dest
.dest
, num_components
,
482 nir_src_bit_size(src
.src
), NULL
);
483 mov
->exact
= build
->exact
;
484 mov
->dest
.write_mask
= (1 << num_components
) - 1;
486 nir_builder_instr_insert(build
, &mov
->instr
);
488 return &mov
->dest
.dest
.ssa
;
492 * Construct an fmov or imov that reswizzles the source's components.
494 static inline nir_ssa_def
*
495 nir_swizzle(nir_builder
*build
, nir_ssa_def
*src
, const unsigned *swiz
,
496 unsigned num_components
, bool use_fmov
)
498 assert(num_components
<= NIR_MAX_VEC_COMPONENTS
);
499 nir_alu_src alu_src
= { NIR_SRC_INIT
};
500 alu_src
.src
= nir_src_for_ssa(src
);
502 bool is_identity_swizzle
= true;
503 for (unsigned i
= 0; i
< num_components
&& i
< NIR_MAX_VEC_COMPONENTS
; i
++) {
505 is_identity_swizzle
= false;
506 alu_src
.swizzle
[i
] = swiz
[i
];
509 if (num_components
== src
->num_components
&& is_identity_swizzle
)
512 return use_fmov
? nir_fmov_alu(build
, alu_src
, num_components
) :
513 nir_imov_alu(build
, alu_src
, num_components
);
516 /* Selects the right fdot given the number of components in each source. */
517 static inline nir_ssa_def
*
518 nir_fdot(nir_builder
*build
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
520 assert(src0
->num_components
== src1
->num_components
);
521 switch (src0
->num_components
) {
522 case 1: return nir_fmul(build
, src0
, src1
);
523 case 2: return nir_fdot2(build
, src0
, src1
);
524 case 3: return nir_fdot3(build
, src0
, src1
);
525 case 4: return nir_fdot4(build
, src0
, src1
);
527 unreachable("bad component size");
533 static inline nir_ssa_def
*
534 nir_bany_inequal(nir_builder
*b
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
536 switch (src0
->num_components
) {
537 case 1: return nir_ine(b
, src0
, src1
);
538 case 2: return nir_bany_inequal2(b
, src0
, src1
);
539 case 3: return nir_bany_inequal3(b
, src0
, src1
);
540 case 4: return nir_bany_inequal4(b
, src0
, src1
);
542 unreachable("bad component size");
546 static inline nir_ssa_def
*
547 nir_bany(nir_builder
*b
, nir_ssa_def
*src
)
549 return nir_bany_inequal(b
, src
, nir_imm_false(b
));
552 static inline nir_ssa_def
*
553 nir_channel(nir_builder
*b
, nir_ssa_def
*def
, unsigned c
)
555 return nir_swizzle(b
, def
, &c
, 1, false);
558 static inline nir_ssa_def
*
559 nir_channels(nir_builder
*b
, nir_ssa_def
*def
, nir_component_mask_t mask
)
561 unsigned num_channels
= 0, swizzle
[NIR_MAX_VEC_COMPONENTS
] = { 0 };
563 for (unsigned i
= 0; i
< NIR_MAX_VEC_COMPONENTS
; i
++) {
564 if ((mask
& (1 << i
)) == 0)
566 swizzle
[num_channels
++] = i
;
569 return nir_swizzle(b
, def
, swizzle
, num_channels
, false);
572 static inline nir_ssa_def
*
573 _nir_vector_extract_helper(nir_builder
*b
, nir_ssa_def
*vec
, nir_ssa_def
*c
,
574 unsigned start
, unsigned end
)
576 if (start
== end
- 1) {
577 return nir_channel(b
, vec
, start
);
579 unsigned mid
= start
+ (end
- start
) / 2;
580 return nir_bcsel(b
, nir_ilt(b
, c
, nir_imm_int(b
, mid
)),
581 _nir_vector_extract_helper(b
, vec
, c
, start
, mid
),
582 _nir_vector_extract_helper(b
, vec
, c
, mid
, end
));
586 static inline nir_ssa_def
*
587 nir_vector_extract(nir_builder
*b
, nir_ssa_def
*vec
, nir_ssa_def
*c
)
589 nir_src c_src
= nir_src_for_ssa(c
);
590 if (nir_src_is_const(c_src
)) {
591 unsigned c_const
= nir_src_as_uint(c_src
);
592 if (c_const
< vec
->num_components
)
593 return nir_channel(b
, vec
, c_const
);
595 return nir_ssa_undef(b
, 1, vec
->bit_size
);
597 return _nir_vector_extract_helper(b
, vec
, c
, 0, vec
->num_components
);
601 static inline nir_ssa_def
*
602 nir_i2i(nir_builder
*build
, nir_ssa_def
*x
, unsigned dest_bit_size
)
604 if (x
->bit_size
== dest_bit_size
)
607 switch (dest_bit_size
) {
608 case 64: return nir_i2i64(build
, x
);
609 case 32: return nir_i2i32(build
, x
);
610 case 16: return nir_i2i16(build
, x
);
611 case 8: return nir_i2i8(build
, x
);
612 default: unreachable("Invalid bit size");
616 static inline nir_ssa_def
*
617 nir_u2u(nir_builder
*build
, nir_ssa_def
*x
, unsigned dest_bit_size
)
619 if (x
->bit_size
== dest_bit_size
)
622 switch (dest_bit_size
) {
623 case 64: return nir_u2u64(build
, x
);
624 case 32: return nir_u2u32(build
, x
);
625 case 16: return nir_u2u16(build
, x
);
626 case 8: return nir_u2u8(build
, x
);
627 default: unreachable("Invalid bit size");
631 static inline nir_ssa_def
*
632 nir_iadd_imm(nir_builder
*build
, nir_ssa_def
*x
, uint64_t y
)
634 assert(x
->bit_size
<= 64);
635 if (x
->bit_size
< 64)
636 y
&= (1ull << x
->bit_size
) - 1;
641 return nir_iadd(build
, x
, nir_imm_intN_t(build
, y
, x
->bit_size
));
645 static inline nir_ssa_def
*
646 nir_imul_imm(nir_builder
*build
, nir_ssa_def
*x
, uint64_t y
)
648 assert(x
->bit_size
<= 64);
649 if (x
->bit_size
< 64)
650 y
&= (1ull << x
->bit_size
) - 1;
653 return nir_imm_intN_t(build
, 0, x
->bit_size
);
656 } else if (util_is_power_of_two_or_zero64(y
)) {
657 return nir_ishl(build
, x
, nir_imm_int(build
, ffsll(y
) - 1));
659 return nir_imul(build
, x
, nir_imm_intN_t(build
, y
, x
->bit_size
));
663 static inline nir_ssa_def
*
664 nir_fadd_imm(nir_builder
*build
, nir_ssa_def
*x
, double y
)
666 return nir_fadd(build
, x
, nir_imm_floatN_t(build
, y
, x
->bit_size
));
669 static inline nir_ssa_def
*
670 nir_fmul_imm(nir_builder
*build
, nir_ssa_def
*x
, double y
)
672 return nir_fmul(build
, x
, nir_imm_floatN_t(build
, y
, x
->bit_size
));
675 static inline nir_ssa_def
*
676 nir_pack_bits(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
678 assert(src
->num_components
* src
->bit_size
== dest_bit_size
);
680 switch (dest_bit_size
) {
682 switch (src
->bit_size
) {
683 case 32: return nir_pack_64_2x32(b
, src
);
684 case 16: return nir_pack_64_4x16(b
, src
);
690 if (src
->bit_size
== 16)
691 return nir_pack_32_2x16(b
, src
);
698 /* If we got here, we have no dedicated unpack opcode. */
699 nir_ssa_def
*dest
= nir_imm_intN_t(b
, 0, dest_bit_size
);
700 for (unsigned i
= 0; i
< src
->num_components
; i
++) {
701 nir_ssa_def
*val
= nir_u2u(b
, nir_channel(b
, src
, i
), dest_bit_size
);
702 val
= nir_ishl(b
, val
, nir_imm_int(b
, i
* src
->bit_size
));
703 dest
= nir_ior(b
, dest
, val
);
708 static inline nir_ssa_def
*
709 nir_unpack_bits(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
711 assert(src
->num_components
== 1);
712 assert(src
->bit_size
> dest_bit_size
);
713 const unsigned dest_num_components
= src
->bit_size
/ dest_bit_size
;
714 assert(dest_num_components
<= NIR_MAX_VEC_COMPONENTS
);
716 switch (src
->bit_size
) {
718 switch (dest_bit_size
) {
719 case 32: return nir_unpack_64_2x32(b
, src
);
720 case 16: return nir_unpack_64_4x16(b
, src
);
726 if (dest_bit_size
== 16)
727 return nir_unpack_32_2x16(b
, src
);
734 /* If we got here, we have no dedicated unpack opcode. */
735 nir_ssa_def
*dest_comps
[NIR_MAX_VEC_COMPONENTS
];
736 for (unsigned i
= 0; i
< dest_num_components
; i
++) {
737 nir_ssa_def
*val
= nir_ushr(b
, src
, nir_imm_int(b
, i
* dest_bit_size
));
738 dest_comps
[i
] = nir_u2u(b
, val
, dest_bit_size
);
740 return nir_vec(b
, dest_comps
, dest_num_components
);
743 static inline nir_ssa_def
*
744 nir_bitcast_vector(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
746 assert((src
->bit_size
* src
->num_components
) % dest_bit_size
== 0);
747 const unsigned dest_num_components
=
748 (src
->bit_size
* src
->num_components
) / dest_bit_size
;
749 assert(dest_num_components
<= NIR_MAX_VEC_COMPONENTS
);
751 if (src
->bit_size
> dest_bit_size
) {
752 assert(src
->bit_size
% dest_bit_size
== 0);
753 if (src
->num_components
== 1) {
754 return nir_unpack_bits(b
, src
, dest_bit_size
);
756 const unsigned divisor
= src
->bit_size
/ dest_bit_size
;
757 assert(src
->num_components
* divisor
== dest_num_components
);
758 nir_ssa_def
*dest
[NIR_MAX_VEC_COMPONENTS
];
759 for (unsigned i
= 0; i
< src
->num_components
; i
++) {
760 nir_ssa_def
*unpacked
=
761 nir_unpack_bits(b
, nir_channel(b
, src
, i
), dest_bit_size
);
762 assert(unpacked
->num_components
== divisor
);
763 for (unsigned j
= 0; j
< divisor
; j
++)
764 dest
[i
* divisor
+ j
] = nir_channel(b
, unpacked
, j
);
766 return nir_vec(b
, dest
, dest_num_components
);
768 } else if (src
->bit_size
< dest_bit_size
) {
769 assert(dest_bit_size
% src
->bit_size
== 0);
770 if (dest_num_components
== 1) {
771 return nir_pack_bits(b
, src
, dest_bit_size
);
773 const unsigned divisor
= dest_bit_size
/ src
->bit_size
;
774 assert(src
->num_components
== dest_num_components
* divisor
);
775 nir_ssa_def
*dest
[NIR_MAX_VEC_COMPONENTS
];
776 for (unsigned i
= 0; i
< dest_num_components
; i
++) {
777 nir_component_mask_t src_mask
=
778 ((1 << divisor
) - 1) << (i
* divisor
);
779 dest
[i
] = nir_pack_bits(b
, nir_channels(b
, src
, src_mask
),
782 return nir_vec(b
, dest
, dest_num_components
);
785 assert(src
->bit_size
== dest_bit_size
);
791 * Turns a nir_src into a nir_ssa_def * so it can be passed to
792 * nir_build_alu()-based builder calls.
794 * See nir_ssa_for_alu_src() for alu instructions.
796 static inline nir_ssa_def
*
797 nir_ssa_for_src(nir_builder
*build
, nir_src src
, int num_components
)
799 if (src
.is_ssa
&& src
.ssa
->num_components
== num_components
)
802 nir_alu_src alu
= { NIR_SRC_INIT
};
804 for (int j
= 0; j
< 4; j
++)
807 return nir_imov_alu(build
, alu
, num_components
);
811 * Similar to nir_ssa_for_src(), but for alu srcs, respecting the
812 * nir_alu_src's swizzle.
814 static inline nir_ssa_def
*
815 nir_ssa_for_alu_src(nir_builder
*build
, nir_alu_instr
*instr
, unsigned srcn
)
817 static uint8_t trivial_swizzle
[NIR_MAX_VEC_COMPONENTS
];
818 for (int i
= 0; i
< NIR_MAX_VEC_COMPONENTS
; ++i
)
819 trivial_swizzle
[i
] = i
;
820 nir_alu_src
*src
= &instr
->src
[srcn
];
821 unsigned num_components
= nir_ssa_alu_instr_src_components(instr
, srcn
);
823 if (src
->src
.is_ssa
&& (src
->src
.ssa
->num_components
== num_components
) &&
824 !src
->abs
&& !src
->negate
&&
825 (memcmp(src
->swizzle
, trivial_swizzle
, num_components
) == 0))
828 return nir_imov_alu(build
, *src
, num_components
);
831 static inline unsigned
832 nir_get_ptr_bitsize(nir_builder
*build
)
834 if (build
->shader
->info
.stage
== MESA_SHADER_KERNEL
)
835 return build
->shader
->info
.cs
.ptr_size
;
839 static inline nir_deref_instr
*
840 nir_build_deref_var(nir_builder
*build
, nir_variable
*var
)
842 nir_deref_instr
*deref
=
843 nir_deref_instr_create(build
->shader
, nir_deref_type_var
);
845 deref
->mode
= var
->data
.mode
;
846 deref
->type
= var
->type
;
849 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
, 1,
850 nir_get_ptr_bitsize(build
), NULL
);
852 nir_builder_instr_insert(build
, &deref
->instr
);
857 static inline nir_deref_instr
*
858 nir_build_deref_array(nir_builder
*build
, nir_deref_instr
*parent
,
861 assert(glsl_type_is_array(parent
->type
) ||
862 glsl_type_is_matrix(parent
->type
) ||
863 glsl_type_is_vector(parent
->type
));
865 assert(index
->bit_size
== parent
->dest
.ssa
.bit_size
);
867 nir_deref_instr
*deref
=
868 nir_deref_instr_create(build
->shader
, nir_deref_type_array
);
870 deref
->mode
= parent
->mode
;
871 deref
->type
= glsl_get_array_element(parent
->type
);
872 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
873 deref
->arr
.index
= nir_src_for_ssa(index
);
875 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
876 parent
->dest
.ssa
.num_components
,
877 parent
->dest
.ssa
.bit_size
, NULL
);
879 nir_builder_instr_insert(build
, &deref
->instr
);
884 static inline nir_deref_instr
*
885 nir_build_deref_array_imm(nir_builder
*build
, nir_deref_instr
*parent
,
888 assert(parent
->dest
.is_ssa
);
889 nir_ssa_def
*idx_ssa
= nir_imm_intN_t(build
, index
,
890 parent
->dest
.ssa
.bit_size
);
892 return nir_build_deref_array(build
, parent
, idx_ssa
);
895 static inline nir_deref_instr
*
896 nir_build_deref_ptr_as_array(nir_builder
*build
, nir_deref_instr
*parent
,
899 assert(parent
->deref_type
== nir_deref_type_array
||
900 parent
->deref_type
== nir_deref_type_ptr_as_array
||
901 parent
->deref_type
== nir_deref_type_cast
);
903 assert(index
->bit_size
== parent
->dest
.ssa
.bit_size
);
905 nir_deref_instr
*deref
=
906 nir_deref_instr_create(build
->shader
, nir_deref_type_ptr_as_array
);
908 deref
->mode
= parent
->mode
;
909 deref
->type
= parent
->type
;
910 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
911 deref
->arr
.index
= nir_src_for_ssa(index
);
913 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
914 parent
->dest
.ssa
.num_components
,
915 parent
->dest
.ssa
.bit_size
, NULL
);
917 nir_builder_instr_insert(build
, &deref
->instr
);
922 static inline nir_deref_instr
*
923 nir_build_deref_array_wildcard(nir_builder
*build
, nir_deref_instr
*parent
)
925 assert(glsl_type_is_array(parent
->type
) ||
926 glsl_type_is_matrix(parent
->type
));
928 nir_deref_instr
*deref
=
929 nir_deref_instr_create(build
->shader
, nir_deref_type_array_wildcard
);
931 deref
->mode
= parent
->mode
;
932 deref
->type
= glsl_get_array_element(parent
->type
);
933 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
935 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
936 parent
->dest
.ssa
.num_components
,
937 parent
->dest
.ssa
.bit_size
, NULL
);
939 nir_builder_instr_insert(build
, &deref
->instr
);
944 static inline nir_deref_instr
*
945 nir_build_deref_struct(nir_builder
*build
, nir_deref_instr
*parent
,
948 assert(glsl_type_is_struct_or_ifc(parent
->type
));
950 nir_deref_instr
*deref
=
951 nir_deref_instr_create(build
->shader
, nir_deref_type_struct
);
953 deref
->mode
= parent
->mode
;
954 deref
->type
= glsl_get_struct_field(parent
->type
, index
);
955 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
956 deref
->strct
.index
= index
;
958 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
959 parent
->dest
.ssa
.num_components
,
960 parent
->dest
.ssa
.bit_size
, NULL
);
962 nir_builder_instr_insert(build
, &deref
->instr
);
967 static inline nir_deref_instr
*
968 nir_build_deref_cast(nir_builder
*build
, nir_ssa_def
*parent
,
969 nir_variable_mode mode
, const struct glsl_type
*type
,
972 nir_deref_instr
*deref
=
973 nir_deref_instr_create(build
->shader
, nir_deref_type_cast
);
977 deref
->parent
= nir_src_for_ssa(parent
);
978 deref
->cast
.ptr_stride
= ptr_stride
;
980 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
981 parent
->num_components
, parent
->bit_size
, NULL
);
983 nir_builder_instr_insert(build
, &deref
->instr
);
988 /** Returns a deref that follows another but starting from the given parent
990 * The new deref will be the same type and take the same array or struct index
991 * as the leader deref but it may have a different parent. This is very
992 * useful for walking deref paths.
994 static inline nir_deref_instr
*
995 nir_build_deref_follower(nir_builder
*b
, nir_deref_instr
*parent
,
996 nir_deref_instr
*leader
)
998 /* If the derefs would have the same parent, don't make a new one */
999 assert(leader
->parent
.is_ssa
);
1000 if (leader
->parent
.ssa
== &parent
->dest
.ssa
)
1003 UNUSED nir_deref_instr
*leader_parent
= nir_src_as_deref(leader
->parent
);
1005 switch (leader
->deref_type
) {
1006 case nir_deref_type_var
:
1007 unreachable("A var dereference cannot have a parent");
1010 case nir_deref_type_array
:
1011 case nir_deref_type_array_wildcard
:
1012 assert(glsl_type_is_matrix(parent
->type
) ||
1013 glsl_type_is_array(parent
->type
) ||
1014 (leader
->deref_type
== nir_deref_type_array
&&
1015 glsl_type_is_vector(parent
->type
)));
1016 assert(glsl_get_length(parent
->type
) ==
1017 glsl_get_length(leader_parent
->type
));
1019 if (leader
->deref_type
== nir_deref_type_array
) {
1020 assert(leader
->arr
.index
.is_ssa
);
1021 nir_ssa_def
*index
= nir_i2i(b
, leader
->arr
.index
.ssa
,
1022 parent
->dest
.ssa
.bit_size
);
1023 return nir_build_deref_array(b
, parent
, index
);
1025 return nir_build_deref_array_wildcard(b
, parent
);
1028 case nir_deref_type_struct
:
1029 assert(glsl_type_is_struct_or_ifc(parent
->type
));
1030 assert(glsl_get_length(parent
->type
) ==
1031 glsl_get_length(leader_parent
->type
));
1033 return nir_build_deref_struct(b
, parent
, leader
->strct
.index
);
1036 unreachable("Invalid deref instruction type");
1040 static inline nir_ssa_def
*
1041 nir_load_reg(nir_builder
*build
, nir_register
*reg
)
1043 return nir_ssa_for_src(build
, nir_src_for_reg(reg
), reg
->num_components
);
1046 static inline nir_ssa_def
*
1047 nir_load_deref_with_access(nir_builder
*build
, nir_deref_instr
*deref
,
1048 enum gl_access_qualifier access
)
1050 nir_intrinsic_instr
*load
=
1051 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_load_deref
);
1052 load
->num_components
= glsl_get_vector_elements(deref
->type
);
1053 load
->src
[0] = nir_src_for_ssa(&deref
->dest
.ssa
);
1054 nir_ssa_dest_init(&load
->instr
, &load
->dest
, load
->num_components
,
1055 glsl_get_bit_size(deref
->type
), NULL
);
1056 nir_intrinsic_set_access(load
, access
);
1057 nir_builder_instr_insert(build
, &load
->instr
);
1058 return &load
->dest
.ssa
;
1061 static inline nir_ssa_def
*
1062 nir_load_deref(nir_builder
*build
, nir_deref_instr
*deref
)
1064 return nir_load_deref_with_access(build
, deref
, (enum gl_access_qualifier
)0);
1068 nir_store_deref_with_access(nir_builder
*build
, nir_deref_instr
*deref
,
1069 nir_ssa_def
*value
, unsigned writemask
,
1070 enum gl_access_qualifier access
)
1072 nir_intrinsic_instr
*store
=
1073 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_store_deref
);
1074 store
->num_components
= glsl_get_vector_elements(deref
->type
);
1075 store
->src
[0] = nir_src_for_ssa(&deref
->dest
.ssa
);
1076 store
->src
[1] = nir_src_for_ssa(value
);
1077 nir_intrinsic_set_write_mask(store
,
1078 writemask
& ((1 << store
->num_components
) - 1));
1079 nir_intrinsic_set_access(store
, access
);
1080 nir_builder_instr_insert(build
, &store
->instr
);
1084 nir_store_deref(nir_builder
*build
, nir_deref_instr
*deref
,
1085 nir_ssa_def
*value
, unsigned writemask
)
1087 nir_store_deref_with_access(build
, deref
, value
, writemask
,
1088 (enum gl_access_qualifier
)0);
1092 nir_copy_deref(nir_builder
*build
, nir_deref_instr
*dest
, nir_deref_instr
*src
)
1094 nir_intrinsic_instr
*copy
=
1095 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_copy_deref
);
1096 copy
->src
[0] = nir_src_for_ssa(&dest
->dest
.ssa
);
1097 copy
->src
[1] = nir_src_for_ssa(&src
->dest
.ssa
);
1098 nir_builder_instr_insert(build
, ©
->instr
);
1101 static inline nir_ssa_def
*
1102 nir_load_var(nir_builder
*build
, nir_variable
*var
)
1104 return nir_load_deref(build
, nir_build_deref_var(build
, var
));
1108 nir_store_var(nir_builder
*build
, nir_variable
*var
, nir_ssa_def
*value
,
1111 nir_store_deref(build
, nir_build_deref_var(build
, var
), value
, writemask
);
1115 nir_copy_var(nir_builder
*build
, nir_variable
*dest
, nir_variable
*src
)
1117 nir_copy_deref(build
, nir_build_deref_var(build
, dest
),
1118 nir_build_deref_var(build
, src
));
1121 static inline nir_ssa_def
*
1122 nir_load_param(nir_builder
*build
, uint32_t param_idx
)
1124 assert(param_idx
< build
->impl
->function
->num_params
);
1125 nir_parameter
*param
= &build
->impl
->function
->params
[param_idx
];
1127 nir_intrinsic_instr
*load
=
1128 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_load_param
);
1129 nir_intrinsic_set_param_idx(load
, param_idx
);
1130 load
->num_components
= param
->num_components
;
1131 nir_ssa_dest_init(&load
->instr
, &load
->dest
,
1132 param
->num_components
, param
->bit_size
, NULL
);
1133 nir_builder_instr_insert(build
, &load
->instr
);
1134 return &load
->dest
.ssa
;
1137 #include "nir_builder_opcodes.h"
1139 static inline nir_ssa_def
*
1140 nir_f2b(nir_builder
*build
, nir_ssa_def
*f
)
1142 return nir_f2b1(build
, f
);
1145 static inline nir_ssa_def
*
1146 nir_i2b(nir_builder
*build
, nir_ssa_def
*i
)
1148 return nir_i2b1(build
, i
);
1151 static inline nir_ssa_def
*
1152 nir_b2f(nir_builder
*build
, nir_ssa_def
*b
, uint32_t bit_size
)
1155 case 64: return nir_b2f64(build
, b
);
1156 case 32: return nir_b2f32(build
, b
);
1157 case 16: return nir_b2f16(build
, b
);
1159 unreachable("Invalid bit-size");
1163 static inline nir_ssa_def
*
1164 nir_load_barycentric(nir_builder
*build
, nir_intrinsic_op op
,
1165 unsigned interp_mode
)
1167 nir_intrinsic_instr
*bary
= nir_intrinsic_instr_create(build
->shader
, op
);
1168 nir_ssa_dest_init(&bary
->instr
, &bary
->dest
, 2, 32, NULL
);
1169 nir_intrinsic_set_interp_mode(bary
, interp_mode
);
1170 nir_builder_instr_insert(build
, &bary
->instr
);
1171 return &bary
->dest
.ssa
;
1175 nir_jump(nir_builder
*build
, nir_jump_type jump_type
)
1177 nir_jump_instr
*jump
= nir_jump_instr_create(build
->shader
, jump_type
);
1178 nir_builder_instr_insert(build
, &jump
->instr
);
1181 static inline nir_ssa_def
*
1182 nir_compare_func(nir_builder
*b
, enum compare_func func
,
1183 nir_ssa_def
*src0
, nir_ssa_def
*src1
)
1186 case COMPARE_FUNC_NEVER
:
1187 return nir_imm_int(b
, 0);
1188 case COMPARE_FUNC_ALWAYS
:
1189 return nir_imm_int(b
, ~0);
1190 case COMPARE_FUNC_EQUAL
:
1191 return nir_feq(b
, src0
, src1
);
1192 case COMPARE_FUNC_NOTEQUAL
:
1193 return nir_fne(b
, src0
, src1
);
1194 case COMPARE_FUNC_GREATER
:
1195 return nir_flt(b
, src1
, src0
);
1196 case COMPARE_FUNC_GEQUAL
:
1197 return nir_fge(b
, src0
, src1
);
1198 case COMPARE_FUNC_LESS
:
1199 return nir_flt(b
, src0
, src1
);
1200 case COMPARE_FUNC_LEQUAL
:
1201 return nir_fge(b
, src1
, src0
);
1203 unreachable("bad compare func");
1206 #endif /* NIR_BUILDER_H */