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
, const nir_const_value
*value
)
199 nir_load_const_instr
*load_const
=
200 nir_load_const_instr_create(build
->shader
, num_components
, bit_size
);
204 memcpy(load_const
->value
, value
, sizeof(nir_const_value
) * num_components
);
206 nir_builder_instr_insert(build
, &load_const
->instr
);
208 return &load_const
->def
;
211 static inline nir_ssa_def
*
212 nir_imm_zero(nir_builder
*build
, unsigned num_components
, unsigned bit_size
)
214 nir_load_const_instr
*load_const
=
215 nir_load_const_instr_create(build
->shader
, num_components
, bit_size
);
217 /* nir_load_const_instr_create uses rzalloc so it's already zero */
219 nir_builder_instr_insert(build
, &load_const
->instr
);
221 return &load_const
->def
;
224 static inline nir_ssa_def
*
225 nir_imm_bool(nir_builder
*build
, bool x
)
229 memset(&v
, 0, sizeof(v
));
232 return nir_build_imm(build
, 1, 1, &v
);
235 static inline nir_ssa_def
*
236 nir_imm_true(nir_builder
*build
)
238 return nir_imm_bool(build
, true);
241 static inline nir_ssa_def
*
242 nir_imm_false(nir_builder
*build
)
244 return nir_imm_bool(build
, false);
247 static inline nir_ssa_def
*
248 nir_imm_float16(nir_builder
*build
, float x
)
252 memset(&v
, 0, sizeof(v
));
253 v
.u16
= _mesa_float_to_half(x
);
255 return nir_build_imm(build
, 1, 16, &v
);
258 static inline nir_ssa_def
*
259 nir_imm_float(nir_builder
*build
, float x
)
263 memset(&v
, 0, sizeof(v
));
266 return nir_build_imm(build
, 1, 32, &v
);
269 static inline nir_ssa_def
*
270 nir_imm_double(nir_builder
*build
, double x
)
274 memset(&v
, 0, sizeof(v
));
277 return nir_build_imm(build
, 1, 64, &v
);
280 static inline nir_ssa_def
*
281 nir_imm_floatN_t(nir_builder
*build
, double x
, unsigned bit_size
)
285 return nir_imm_float16(build
, x
);
287 return nir_imm_float(build
, x
);
289 return nir_imm_double(build
, x
);
292 unreachable("unknown float immediate bit size");
295 static inline nir_ssa_def
*
296 nir_imm_vec2(nir_builder
*build
, float x
, float y
)
298 nir_const_value v
[2];
300 memset(v
, 0, sizeof(v
));
304 return nir_build_imm(build
, 2, 32, v
);
307 static inline nir_ssa_def
*
308 nir_imm_vec4(nir_builder
*build
, float x
, float y
, float z
, float w
)
310 nir_const_value v
[4];
312 memset(v
, 0, sizeof(v
));
318 return nir_build_imm(build
, 4, 32, v
);
321 static inline nir_ssa_def
*
322 nir_imm_vec4_16(nir_builder
*build
, float x
, float y
, float z
, float w
)
324 nir_const_value v
[4];
326 memset(v
, 0, sizeof(v
));
327 v
[0].u16
= _mesa_float_to_half(x
);
328 v
[1].u16
= _mesa_float_to_half(y
);
329 v
[2].u16
= _mesa_float_to_half(z
);
330 v
[3].u16
= _mesa_float_to_half(w
);
332 return nir_build_imm(build
, 4, 16, v
);
335 static inline nir_ssa_def
*
336 nir_imm_ivec2(nir_builder
*build
, int x
, int y
)
338 nir_const_value v
[2];
340 memset(v
, 0, sizeof(v
));
344 return nir_build_imm(build
, 2, 32, v
);
347 static inline nir_ssa_def
*
348 nir_imm_int(nir_builder
*build
, int x
)
352 memset(&v
, 0, sizeof(v
));
355 return nir_build_imm(build
, 1, 32, &v
);
358 static inline nir_ssa_def
*
359 nir_imm_int64(nir_builder
*build
, int64_t x
)
363 memset(&v
, 0, sizeof(v
));
366 return nir_build_imm(build
, 1, 64, &v
);
369 static inline nir_ssa_def
*
370 nir_imm_intN_t(nir_builder
*build
, uint64_t x
, unsigned bit_size
)
374 memset(&v
, 0, sizeof(v
));
375 assert(bit_size
<= 64);
379 v
.i64
= x
& (~0ull >> (64 - bit_size
));
381 return nir_build_imm(build
, 1, bit_size
, &v
);
384 static inline nir_ssa_def
*
385 nir_imm_ivec4(nir_builder
*build
, int x
, int y
, int z
, int w
)
387 nir_const_value v
[4];
389 memset(v
, 0, sizeof(v
));
395 return nir_build_imm(build
, 4, 32, v
);
398 static inline nir_ssa_def
*
399 nir_imm_boolN_t(nir_builder
*build
, bool x
, unsigned bit_size
)
401 /* We use a 0/-1 convention for all booleans regardless of size */
402 return nir_imm_intN_t(build
, -(int)x
, bit_size
);
405 static inline nir_ssa_def
*
406 nir_builder_alu_instr_finish_and_insert(nir_builder
*build
, nir_alu_instr
*instr
)
408 const nir_op_info
*op_info
= &nir_op_infos
[instr
->op
];
410 instr
->exact
= build
->exact
;
412 /* Guess the number of components the destination temporary should have
413 * based on our input sizes, if it's not fixed for the op.
415 unsigned num_components
= op_info
->output_size
;
416 if (num_components
== 0) {
417 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
418 if (op_info
->input_sizes
[i
] == 0)
419 num_components
= MAX2(num_components
,
420 instr
->src
[i
].src
.ssa
->num_components
);
423 assert(num_components
!= 0);
425 /* Figure out the bitwidth based on the source bitwidth if the instruction
428 unsigned bit_size
= nir_alu_type_get_type_size(op_info
->output_type
);
430 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
431 unsigned src_bit_size
= instr
->src
[i
].src
.ssa
->bit_size
;
432 if (nir_alu_type_get_type_size(op_info
->input_types
[i
]) == 0) {
434 assert(src_bit_size
== bit_size
);
436 bit_size
= src_bit_size
;
438 assert(src_bit_size
==
439 nir_alu_type_get_type_size(op_info
->input_types
[i
]));
444 /* When in doubt, assume 32. */
448 /* Make sure we don't swizzle from outside of our source vector (like if a
449 * scalar value was passed into a multiply with a vector).
451 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
452 for (unsigned j
= instr
->src
[i
].src
.ssa
->num_components
;
453 j
< NIR_MAX_VEC_COMPONENTS
; j
++) {
454 instr
->src
[i
].swizzle
[j
] = instr
->src
[i
].src
.ssa
->num_components
- 1;
458 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
.dest
, num_components
,
460 instr
->dest
.write_mask
= (1 << num_components
) - 1;
462 nir_builder_instr_insert(build
, &instr
->instr
);
464 return &instr
->dest
.dest
.ssa
;
467 static inline nir_ssa_def
*
468 nir_build_alu(nir_builder
*build
, nir_op op
, nir_ssa_def
*src0
,
469 nir_ssa_def
*src1
, nir_ssa_def
*src2
, nir_ssa_def
*src3
)
471 nir_alu_instr
*instr
= nir_alu_instr_create(build
->shader
, op
);
475 instr
->src
[0].src
= nir_src_for_ssa(src0
);
477 instr
->src
[1].src
= nir_src_for_ssa(src1
);
479 instr
->src
[2].src
= nir_src_for_ssa(src2
);
481 instr
->src
[3].src
= nir_src_for_ssa(src3
);
483 return nir_builder_alu_instr_finish_and_insert(build
, instr
);
486 /* for the couple special cases with more than 4 src args: */
487 static inline nir_ssa_def
*
488 nir_build_alu_src_arr(nir_builder
*build
, nir_op op
, nir_ssa_def
**srcs
)
490 const nir_op_info
*op_info
= &nir_op_infos
[op
];
491 nir_alu_instr
*instr
= nir_alu_instr_create(build
->shader
, op
);
495 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++)
496 instr
->src
[i
].src
= nir_src_for_ssa(srcs
[i
]);
498 return nir_builder_alu_instr_finish_and_insert(build
, instr
);
501 #include "nir_builder_opcodes.h"
503 static inline nir_ssa_def
*
504 nir_vec(nir_builder
*build
, nir_ssa_def
**comp
, unsigned num_components
)
506 return nir_build_alu_src_arr(build
, nir_op_vec(num_components
), comp
);
509 static inline nir_ssa_def
*
510 nir_mov_alu(nir_builder
*build
, nir_alu_src src
, unsigned num_components
)
512 assert(!src
.abs
&& !src
.negate
);
513 nir_alu_instr
*mov
= nir_alu_instr_create(build
->shader
, nir_op_mov
);
514 nir_ssa_dest_init(&mov
->instr
, &mov
->dest
.dest
, num_components
,
515 nir_src_bit_size(src
.src
), NULL
);
516 mov
->exact
= build
->exact
;
517 mov
->dest
.write_mask
= (1 << num_components
) - 1;
519 nir_builder_instr_insert(build
, &mov
->instr
);
521 return &mov
->dest
.dest
.ssa
;
525 * Construct an fmov or imov that reswizzles the source's components.
527 static inline nir_ssa_def
*
528 nir_swizzle(nir_builder
*build
, nir_ssa_def
*src
, const unsigned *swiz
,
529 unsigned num_components
)
531 assert(num_components
<= NIR_MAX_VEC_COMPONENTS
);
532 nir_alu_src alu_src
= { NIR_SRC_INIT
};
533 alu_src
.src
= nir_src_for_ssa(src
);
535 bool is_identity_swizzle
= true;
536 for (unsigned i
= 0; i
< num_components
&& i
< NIR_MAX_VEC_COMPONENTS
; i
++) {
538 is_identity_swizzle
= false;
539 alu_src
.swizzle
[i
] = swiz
[i
];
542 if (num_components
== src
->num_components
&& is_identity_swizzle
)
545 return nir_mov_alu(build
, alu_src
, num_components
);
548 /* Selects the right fdot given the number of components in each source. */
549 static inline nir_ssa_def
*
550 nir_fdot(nir_builder
*build
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
552 assert(src0
->num_components
== src1
->num_components
);
553 switch (src0
->num_components
) {
554 case 1: return nir_fmul(build
, src0
, src1
);
555 case 2: return nir_fdot2(build
, src0
, src1
);
556 case 3: return nir_fdot3(build
, src0
, src1
);
557 case 4: return nir_fdot4(build
, src0
, src1
);
559 unreachable("bad component size");
565 static inline nir_ssa_def
*
566 nir_ball_iequal(nir_builder
*b
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
568 switch (src0
->num_components
) {
569 case 1: return nir_ieq(b
, src0
, src1
);
570 case 2: return nir_ball_iequal2(b
, src0
, src1
);
571 case 3: return nir_ball_iequal3(b
, src0
, src1
);
572 case 4: return nir_ball_iequal4(b
, src0
, src1
);
574 unreachable("bad component size");
578 static inline nir_ssa_def
*
579 nir_bany_inequal(nir_builder
*b
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
581 switch (src0
->num_components
) {
582 case 1: return nir_ine(b
, src0
, src1
);
583 case 2: return nir_bany_inequal2(b
, src0
, src1
);
584 case 3: return nir_bany_inequal3(b
, src0
, src1
);
585 case 4: return nir_bany_inequal4(b
, src0
, src1
);
587 unreachable("bad component size");
591 static inline nir_ssa_def
*
592 nir_bany(nir_builder
*b
, nir_ssa_def
*src
)
594 return nir_bany_inequal(b
, src
, nir_imm_false(b
));
597 static inline nir_ssa_def
*
598 nir_channel(nir_builder
*b
, nir_ssa_def
*def
, unsigned c
)
600 return nir_swizzle(b
, def
, &c
, 1);
603 static inline nir_ssa_def
*
604 nir_channels(nir_builder
*b
, nir_ssa_def
*def
, nir_component_mask_t mask
)
606 unsigned num_channels
= 0, swizzle
[NIR_MAX_VEC_COMPONENTS
] = { 0 };
608 for (unsigned i
= 0; i
< NIR_MAX_VEC_COMPONENTS
; i
++) {
609 if ((mask
& (1 << i
)) == 0)
611 swizzle
[num_channels
++] = i
;
614 return nir_swizzle(b
, def
, swizzle
, num_channels
);
617 static inline nir_ssa_def
*
618 _nir_vector_extract_helper(nir_builder
*b
, nir_ssa_def
*vec
, nir_ssa_def
*c
,
619 unsigned start
, unsigned end
)
621 if (start
== end
- 1) {
622 return nir_channel(b
, vec
, start
);
624 unsigned mid
= start
+ (end
- start
) / 2;
625 return nir_bcsel(b
, nir_ilt(b
, c
, nir_imm_int(b
, mid
)),
626 _nir_vector_extract_helper(b
, vec
, c
, start
, mid
),
627 _nir_vector_extract_helper(b
, vec
, c
, mid
, end
));
631 static inline nir_ssa_def
*
632 nir_vector_extract(nir_builder
*b
, nir_ssa_def
*vec
, nir_ssa_def
*c
)
634 nir_src c_src
= nir_src_for_ssa(c
);
635 if (nir_src_is_const(c_src
)) {
636 unsigned c_const
= nir_src_as_uint(c_src
);
637 if (c_const
< vec
->num_components
)
638 return nir_channel(b
, vec
, c_const
);
640 return nir_ssa_undef(b
, 1, vec
->bit_size
);
642 return _nir_vector_extract_helper(b
, vec
, c
, 0, vec
->num_components
);
646 static inline nir_ssa_def
*
647 nir_i2i(nir_builder
*build
, nir_ssa_def
*x
, unsigned dest_bit_size
)
649 if (x
->bit_size
== dest_bit_size
)
652 switch (dest_bit_size
) {
653 case 64: return nir_i2i64(build
, x
);
654 case 32: return nir_i2i32(build
, x
);
655 case 16: return nir_i2i16(build
, x
);
656 case 8: return nir_i2i8(build
, x
);
657 default: unreachable("Invalid bit size");
661 static inline nir_ssa_def
*
662 nir_u2u(nir_builder
*build
, nir_ssa_def
*x
, unsigned dest_bit_size
)
664 if (x
->bit_size
== dest_bit_size
)
667 switch (dest_bit_size
) {
668 case 64: return nir_u2u64(build
, x
);
669 case 32: return nir_u2u32(build
, x
);
670 case 16: return nir_u2u16(build
, x
);
671 case 8: return nir_u2u8(build
, x
);
672 default: unreachable("Invalid bit size");
676 static inline nir_ssa_def
*
677 nir_iadd_imm(nir_builder
*build
, nir_ssa_def
*x
, uint64_t y
)
679 assert(x
->bit_size
<= 64);
680 if (x
->bit_size
< 64)
681 y
&= (1ull << x
->bit_size
) - 1;
686 return nir_iadd(build
, x
, nir_imm_intN_t(build
, y
, x
->bit_size
));
690 static inline nir_ssa_def
*
691 nir_imul_imm(nir_builder
*build
, nir_ssa_def
*x
, uint64_t y
)
693 assert(x
->bit_size
<= 64);
694 if (x
->bit_size
< 64)
695 y
&= (1ull << x
->bit_size
) - 1;
698 return nir_imm_intN_t(build
, 0, x
->bit_size
);
701 } else if (util_is_power_of_two_or_zero64(y
)) {
702 return nir_ishl(build
, x
, nir_imm_int(build
, ffsll(y
) - 1));
704 return nir_imul(build
, x
, nir_imm_intN_t(build
, y
, x
->bit_size
));
708 static inline nir_ssa_def
*
709 nir_fadd_imm(nir_builder
*build
, nir_ssa_def
*x
, double y
)
711 return nir_fadd(build
, x
, nir_imm_floatN_t(build
, y
, x
->bit_size
));
714 static inline nir_ssa_def
*
715 nir_fmul_imm(nir_builder
*build
, nir_ssa_def
*x
, double y
)
717 return nir_fmul(build
, x
, nir_imm_floatN_t(build
, y
, x
->bit_size
));
720 static inline nir_ssa_def
*
721 nir_pack_bits(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
723 assert(src
->num_components
* src
->bit_size
== dest_bit_size
);
725 switch (dest_bit_size
) {
727 switch (src
->bit_size
) {
728 case 32: return nir_pack_64_2x32(b
, src
);
729 case 16: return nir_pack_64_4x16(b
, src
);
735 if (src
->bit_size
== 16)
736 return nir_pack_32_2x16(b
, src
);
743 /* If we got here, we have no dedicated unpack opcode. */
744 nir_ssa_def
*dest
= nir_imm_intN_t(b
, 0, dest_bit_size
);
745 for (unsigned i
= 0; i
< src
->num_components
; i
++) {
746 nir_ssa_def
*val
= nir_u2u(b
, nir_channel(b
, src
, i
), dest_bit_size
);
747 val
= nir_ishl(b
, val
, nir_imm_int(b
, i
* src
->bit_size
));
748 dest
= nir_ior(b
, dest
, val
);
753 static inline nir_ssa_def
*
754 nir_unpack_bits(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
756 assert(src
->num_components
== 1);
757 assert(src
->bit_size
> dest_bit_size
);
758 const unsigned dest_num_components
= src
->bit_size
/ dest_bit_size
;
759 assert(dest_num_components
<= NIR_MAX_VEC_COMPONENTS
);
761 switch (src
->bit_size
) {
763 switch (dest_bit_size
) {
764 case 32: return nir_unpack_64_2x32(b
, src
);
765 case 16: return nir_unpack_64_4x16(b
, src
);
771 if (dest_bit_size
== 16)
772 return nir_unpack_32_2x16(b
, src
);
779 /* If we got here, we have no dedicated unpack opcode. */
780 nir_ssa_def
*dest_comps
[NIR_MAX_VEC_COMPONENTS
];
781 for (unsigned i
= 0; i
< dest_num_components
; i
++) {
782 nir_ssa_def
*val
= nir_ushr(b
, src
, nir_imm_int(b
, i
* dest_bit_size
));
783 dest_comps
[i
] = nir_u2u(b
, val
, dest_bit_size
);
785 return nir_vec(b
, dest_comps
, dest_num_components
);
788 static inline nir_ssa_def
*
789 nir_bitcast_vector(nir_builder
*b
, nir_ssa_def
*src
, unsigned dest_bit_size
)
791 assert((src
->bit_size
* src
->num_components
) % dest_bit_size
== 0);
792 const unsigned dest_num_components
=
793 (src
->bit_size
* src
->num_components
) / dest_bit_size
;
794 assert(dest_num_components
<= NIR_MAX_VEC_COMPONENTS
);
796 if (src
->bit_size
> dest_bit_size
) {
797 assert(src
->bit_size
% dest_bit_size
== 0);
798 if (src
->num_components
== 1) {
799 return nir_unpack_bits(b
, src
, dest_bit_size
);
801 const unsigned divisor
= src
->bit_size
/ dest_bit_size
;
802 assert(src
->num_components
* divisor
== dest_num_components
);
803 nir_ssa_def
*dest
[NIR_MAX_VEC_COMPONENTS
];
804 for (unsigned i
= 0; i
< src
->num_components
; i
++) {
805 nir_ssa_def
*unpacked
=
806 nir_unpack_bits(b
, nir_channel(b
, src
, i
), dest_bit_size
);
807 assert(unpacked
->num_components
== divisor
);
808 for (unsigned j
= 0; j
< divisor
; j
++)
809 dest
[i
* divisor
+ j
] = nir_channel(b
, unpacked
, j
);
811 return nir_vec(b
, dest
, dest_num_components
);
813 } else if (src
->bit_size
< dest_bit_size
) {
814 assert(dest_bit_size
% src
->bit_size
== 0);
815 if (dest_num_components
== 1) {
816 return nir_pack_bits(b
, src
, dest_bit_size
);
818 const unsigned divisor
= dest_bit_size
/ src
->bit_size
;
819 assert(src
->num_components
== dest_num_components
* divisor
);
820 nir_ssa_def
*dest
[NIR_MAX_VEC_COMPONENTS
];
821 for (unsigned i
= 0; i
< dest_num_components
; i
++) {
822 nir_component_mask_t src_mask
=
823 ((1 << divisor
) - 1) << (i
* divisor
);
824 dest
[i
] = nir_pack_bits(b
, nir_channels(b
, src
, src_mask
),
827 return nir_vec(b
, dest
, dest_num_components
);
830 assert(src
->bit_size
== dest_bit_size
);
836 * Turns a nir_src into a nir_ssa_def * so it can be passed to
837 * nir_build_alu()-based builder calls.
839 * See nir_ssa_for_alu_src() for alu instructions.
841 static inline nir_ssa_def
*
842 nir_ssa_for_src(nir_builder
*build
, nir_src src
, int num_components
)
844 if (src
.is_ssa
&& src
.ssa
->num_components
== num_components
)
847 nir_alu_src alu
= { NIR_SRC_INIT
};
849 for (int j
= 0; j
< 4; j
++)
852 return nir_mov_alu(build
, alu
, num_components
);
856 * Similar to nir_ssa_for_src(), but for alu srcs, respecting the
857 * nir_alu_src's swizzle.
859 static inline nir_ssa_def
*
860 nir_ssa_for_alu_src(nir_builder
*build
, nir_alu_instr
*instr
, unsigned srcn
)
862 static uint8_t trivial_swizzle
[NIR_MAX_VEC_COMPONENTS
];
863 for (int i
= 0; i
< NIR_MAX_VEC_COMPONENTS
; ++i
)
864 trivial_swizzle
[i
] = i
;
865 nir_alu_src
*src
= &instr
->src
[srcn
];
866 unsigned num_components
= nir_ssa_alu_instr_src_components(instr
, srcn
);
868 if (src
->src
.is_ssa
&& (src
->src
.ssa
->num_components
== num_components
) &&
869 !src
->abs
&& !src
->negate
&&
870 (memcmp(src
->swizzle
, trivial_swizzle
, num_components
) == 0))
873 return nir_mov_alu(build
, *src
, num_components
);
876 static inline unsigned
877 nir_get_ptr_bitsize(nir_builder
*build
)
879 if (build
->shader
->info
.stage
== MESA_SHADER_KERNEL
)
880 return build
->shader
->info
.cs
.ptr_size
;
884 static inline nir_deref_instr
*
885 nir_build_deref_var(nir_builder
*build
, nir_variable
*var
)
887 nir_deref_instr
*deref
=
888 nir_deref_instr_create(build
->shader
, nir_deref_type_var
);
890 deref
->mode
= var
->data
.mode
;
891 deref
->type
= var
->type
;
894 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
, 1,
895 nir_get_ptr_bitsize(build
), NULL
);
897 nir_builder_instr_insert(build
, &deref
->instr
);
902 static inline nir_deref_instr
*
903 nir_build_deref_array(nir_builder
*build
, nir_deref_instr
*parent
,
906 assert(glsl_type_is_array(parent
->type
) ||
907 glsl_type_is_matrix(parent
->type
) ||
908 glsl_type_is_vector(parent
->type
));
910 assert(index
->bit_size
== parent
->dest
.ssa
.bit_size
);
912 nir_deref_instr
*deref
=
913 nir_deref_instr_create(build
->shader
, nir_deref_type_array
);
915 deref
->mode
= parent
->mode
;
916 deref
->type
= glsl_get_array_element(parent
->type
);
917 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
918 deref
->arr
.index
= nir_src_for_ssa(index
);
920 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
921 parent
->dest
.ssa
.num_components
,
922 parent
->dest
.ssa
.bit_size
, NULL
);
924 nir_builder_instr_insert(build
, &deref
->instr
);
929 static inline nir_deref_instr
*
930 nir_build_deref_array_imm(nir_builder
*build
, nir_deref_instr
*parent
,
933 assert(parent
->dest
.is_ssa
);
934 nir_ssa_def
*idx_ssa
= nir_imm_intN_t(build
, index
,
935 parent
->dest
.ssa
.bit_size
);
937 return nir_build_deref_array(build
, parent
, idx_ssa
);
940 static inline nir_deref_instr
*
941 nir_build_deref_ptr_as_array(nir_builder
*build
, nir_deref_instr
*parent
,
944 assert(parent
->deref_type
== nir_deref_type_array
||
945 parent
->deref_type
== nir_deref_type_ptr_as_array
||
946 parent
->deref_type
== nir_deref_type_cast
);
948 assert(index
->bit_size
== parent
->dest
.ssa
.bit_size
);
950 nir_deref_instr
*deref
=
951 nir_deref_instr_create(build
->shader
, nir_deref_type_ptr_as_array
);
953 deref
->mode
= parent
->mode
;
954 deref
->type
= parent
->type
;
955 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
956 deref
->arr
.index
= nir_src_for_ssa(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_array_wildcard(nir_builder
*build
, nir_deref_instr
*parent
)
970 assert(glsl_type_is_array(parent
->type
) ||
971 glsl_type_is_matrix(parent
->type
));
973 nir_deref_instr
*deref
=
974 nir_deref_instr_create(build
->shader
, nir_deref_type_array_wildcard
);
976 deref
->mode
= parent
->mode
;
977 deref
->type
= glsl_get_array_element(parent
->type
);
978 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
980 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
981 parent
->dest
.ssa
.num_components
,
982 parent
->dest
.ssa
.bit_size
, NULL
);
984 nir_builder_instr_insert(build
, &deref
->instr
);
989 static inline nir_deref_instr
*
990 nir_build_deref_struct(nir_builder
*build
, nir_deref_instr
*parent
,
993 assert(glsl_type_is_struct_or_ifc(parent
->type
));
995 nir_deref_instr
*deref
=
996 nir_deref_instr_create(build
->shader
, nir_deref_type_struct
);
998 deref
->mode
= parent
->mode
;
999 deref
->type
= glsl_get_struct_field(parent
->type
, index
);
1000 deref
->parent
= nir_src_for_ssa(&parent
->dest
.ssa
);
1001 deref
->strct
.index
= index
;
1003 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
1004 parent
->dest
.ssa
.num_components
,
1005 parent
->dest
.ssa
.bit_size
, NULL
);
1007 nir_builder_instr_insert(build
, &deref
->instr
);
1012 static inline nir_deref_instr
*
1013 nir_build_deref_cast(nir_builder
*build
, nir_ssa_def
*parent
,
1014 nir_variable_mode mode
, const struct glsl_type
*type
,
1015 unsigned ptr_stride
)
1017 nir_deref_instr
*deref
=
1018 nir_deref_instr_create(build
->shader
, nir_deref_type_cast
);
1022 deref
->parent
= nir_src_for_ssa(parent
);
1023 deref
->cast
.ptr_stride
= ptr_stride
;
1025 nir_ssa_dest_init(&deref
->instr
, &deref
->dest
,
1026 parent
->num_components
, parent
->bit_size
, NULL
);
1028 nir_builder_instr_insert(build
, &deref
->instr
);
1033 /** Returns a deref that follows another but starting from the given parent
1035 * The new deref will be the same type and take the same array or struct index
1036 * as the leader deref but it may have a different parent. This is very
1037 * useful for walking deref paths.
1039 static inline nir_deref_instr
*
1040 nir_build_deref_follower(nir_builder
*b
, nir_deref_instr
*parent
,
1041 nir_deref_instr
*leader
)
1043 /* If the derefs would have the same parent, don't make a new one */
1044 assert(leader
->parent
.is_ssa
);
1045 if (leader
->parent
.ssa
== &parent
->dest
.ssa
)
1048 UNUSED nir_deref_instr
*leader_parent
= nir_src_as_deref(leader
->parent
);
1050 switch (leader
->deref_type
) {
1051 case nir_deref_type_var
:
1052 unreachable("A var dereference cannot have a parent");
1055 case nir_deref_type_array
:
1056 case nir_deref_type_array_wildcard
:
1057 assert(glsl_type_is_matrix(parent
->type
) ||
1058 glsl_type_is_array(parent
->type
) ||
1059 (leader
->deref_type
== nir_deref_type_array
&&
1060 glsl_type_is_vector(parent
->type
)));
1061 assert(glsl_get_length(parent
->type
) ==
1062 glsl_get_length(leader_parent
->type
));
1064 if (leader
->deref_type
== nir_deref_type_array
) {
1065 assert(leader
->arr
.index
.is_ssa
);
1066 nir_ssa_def
*index
= nir_i2i(b
, leader
->arr
.index
.ssa
,
1067 parent
->dest
.ssa
.bit_size
);
1068 return nir_build_deref_array(b
, parent
, index
);
1070 return nir_build_deref_array_wildcard(b
, parent
);
1073 case nir_deref_type_struct
:
1074 assert(glsl_type_is_struct_or_ifc(parent
->type
));
1075 assert(glsl_get_length(parent
->type
) ==
1076 glsl_get_length(leader_parent
->type
));
1078 return nir_build_deref_struct(b
, parent
, leader
->strct
.index
);
1081 unreachable("Invalid deref instruction type");
1085 static inline nir_ssa_def
*
1086 nir_load_reg(nir_builder
*build
, nir_register
*reg
)
1088 return nir_ssa_for_src(build
, nir_src_for_reg(reg
), reg
->num_components
);
1091 static inline nir_ssa_def
*
1092 nir_load_deref_with_access(nir_builder
*build
, nir_deref_instr
*deref
,
1093 enum gl_access_qualifier access
)
1095 nir_intrinsic_instr
*load
=
1096 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_load_deref
);
1097 load
->num_components
= glsl_get_vector_elements(deref
->type
);
1098 load
->src
[0] = nir_src_for_ssa(&deref
->dest
.ssa
);
1099 nir_ssa_dest_init(&load
->instr
, &load
->dest
, load
->num_components
,
1100 glsl_get_bit_size(deref
->type
), NULL
);
1101 nir_intrinsic_set_access(load
, access
);
1102 nir_builder_instr_insert(build
, &load
->instr
);
1103 return &load
->dest
.ssa
;
1106 static inline nir_ssa_def
*
1107 nir_load_deref(nir_builder
*build
, nir_deref_instr
*deref
)
1109 return nir_load_deref_with_access(build
, deref
, (enum gl_access_qualifier
)0);
1113 nir_store_deref_with_access(nir_builder
*build
, nir_deref_instr
*deref
,
1114 nir_ssa_def
*value
, unsigned writemask
,
1115 enum gl_access_qualifier access
)
1117 nir_intrinsic_instr
*store
=
1118 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_store_deref
);
1119 store
->num_components
= glsl_get_vector_elements(deref
->type
);
1120 store
->src
[0] = nir_src_for_ssa(&deref
->dest
.ssa
);
1121 store
->src
[1] = nir_src_for_ssa(value
);
1122 nir_intrinsic_set_write_mask(store
,
1123 writemask
& ((1 << store
->num_components
) - 1));
1124 nir_intrinsic_set_access(store
, access
);
1125 nir_builder_instr_insert(build
, &store
->instr
);
1129 nir_store_deref(nir_builder
*build
, nir_deref_instr
*deref
,
1130 nir_ssa_def
*value
, unsigned writemask
)
1132 nir_store_deref_with_access(build
, deref
, value
, writemask
,
1133 (enum gl_access_qualifier
)0);
1137 nir_copy_deref_with_access(nir_builder
*build
, nir_deref_instr
*dest
,
1138 nir_deref_instr
*src
,
1139 enum gl_access_qualifier dest_access
,
1140 enum gl_access_qualifier src_access
)
1142 nir_intrinsic_instr
*copy
=
1143 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_copy_deref
);
1144 copy
->src
[0] = nir_src_for_ssa(&dest
->dest
.ssa
);
1145 copy
->src
[1] = nir_src_for_ssa(&src
->dest
.ssa
);
1146 nir_intrinsic_set_dst_access(copy
, dest_access
);
1147 nir_intrinsic_set_src_access(copy
, src_access
);
1148 nir_builder_instr_insert(build
, ©
->instr
);
1152 nir_copy_deref(nir_builder
*build
, nir_deref_instr
*dest
, nir_deref_instr
*src
)
1154 nir_copy_deref_with_access(build
, dest
, src
,
1155 (enum gl_access_qualifier
) 0,
1156 (enum gl_access_qualifier
) 0);
1159 static inline nir_ssa_def
*
1160 nir_load_var(nir_builder
*build
, nir_variable
*var
)
1162 return nir_load_deref(build
, nir_build_deref_var(build
, var
));
1166 nir_store_var(nir_builder
*build
, nir_variable
*var
, nir_ssa_def
*value
,
1169 nir_store_deref(build
, nir_build_deref_var(build
, var
), value
, writemask
);
1173 nir_copy_var(nir_builder
*build
, nir_variable
*dest
, nir_variable
*src
)
1175 nir_copy_deref(build
, nir_build_deref_var(build
, dest
),
1176 nir_build_deref_var(build
, src
));
1179 static inline nir_ssa_def
*
1180 nir_load_param(nir_builder
*build
, uint32_t param_idx
)
1182 assert(param_idx
< build
->impl
->function
->num_params
);
1183 nir_parameter
*param
= &build
->impl
->function
->params
[param_idx
];
1185 nir_intrinsic_instr
*load
=
1186 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_load_param
);
1187 nir_intrinsic_set_param_idx(load
, param_idx
);
1188 load
->num_components
= param
->num_components
;
1189 nir_ssa_dest_init(&load
->instr
, &load
->dest
,
1190 param
->num_components
, param
->bit_size
, NULL
);
1191 nir_builder_instr_insert(build
, &load
->instr
);
1192 return &load
->dest
.ssa
;
1195 #include "nir_builder_opcodes.h"
1197 static inline nir_ssa_def
*
1198 nir_f2b(nir_builder
*build
, nir_ssa_def
*f
)
1200 return nir_f2b1(build
, f
);
1203 static inline nir_ssa_def
*
1204 nir_i2b(nir_builder
*build
, nir_ssa_def
*i
)
1206 return nir_i2b1(build
, i
);
1209 static inline nir_ssa_def
*
1210 nir_b2f(nir_builder
*build
, nir_ssa_def
*b
, uint32_t bit_size
)
1213 case 64: return nir_b2f64(build
, b
);
1214 case 32: return nir_b2f32(build
, b
);
1215 case 16: return nir_b2f16(build
, b
);
1217 unreachable("Invalid bit-size");
1221 static inline nir_ssa_def
*
1222 nir_load_barycentric(nir_builder
*build
, nir_intrinsic_op op
,
1223 unsigned interp_mode
)
1225 nir_intrinsic_instr
*bary
= nir_intrinsic_instr_create(build
->shader
, op
);
1226 nir_ssa_dest_init(&bary
->instr
, &bary
->dest
, 2, 32, NULL
);
1227 nir_intrinsic_set_interp_mode(bary
, interp_mode
);
1228 nir_builder_instr_insert(build
, &bary
->instr
);
1229 return &bary
->dest
.ssa
;
1233 nir_jump(nir_builder
*build
, nir_jump_type jump_type
)
1235 nir_jump_instr
*jump
= nir_jump_instr_create(build
->shader
, jump_type
);
1236 nir_builder_instr_insert(build
, &jump
->instr
);
1239 static inline nir_ssa_def
*
1240 nir_compare_func(nir_builder
*b
, enum compare_func func
,
1241 nir_ssa_def
*src0
, nir_ssa_def
*src1
)
1244 case COMPARE_FUNC_NEVER
:
1245 return nir_imm_int(b
, 0);
1246 case COMPARE_FUNC_ALWAYS
:
1247 return nir_imm_int(b
, ~0);
1248 case COMPARE_FUNC_EQUAL
:
1249 return nir_feq(b
, src0
, src1
);
1250 case COMPARE_FUNC_NOTEQUAL
:
1251 return nir_fne(b
, src0
, src1
);
1252 case COMPARE_FUNC_GREATER
:
1253 return nir_flt(b
, src1
, src0
);
1254 case COMPARE_FUNC_GEQUAL
:
1255 return nir_fge(b
, src0
, src1
);
1256 case COMPARE_FUNC_LESS
:
1257 return nir_flt(b
, src0
, src1
);
1258 case COMPARE_FUNC_LEQUAL
:
1259 return nir_fge(b
, src1
, src0
);
1261 unreachable("bad compare func");
1264 #endif /* NIR_BUILDER_H */