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"
31 typedef struct nir_builder
{
35 nir_function_impl
*impl
;
39 nir_builder_init(nir_builder
*build
, nir_function_impl
*impl
)
41 memset(build
, 0, sizeof(*build
));
43 build
->shader
= impl
->function
->shader
;
47 nir_builder_instr_insert(nir_builder
*build
, nir_instr
*instr
)
49 nir_instr_insert(build
->cursor
, instr
);
51 /* Move the cursor forward. */
52 build
->cursor
= nir_after_instr(instr
);
56 nir_builder_cf_insert(nir_builder
*build
, nir_cf_node
*cf
)
58 nir_cf_node_insert(build
->cursor
, cf
);
61 static inline nir_ssa_def
*
62 nir_ssa_undef(nir_builder
*build
, unsigned num_components
)
64 nir_ssa_undef_instr
*undef
=
65 nir_ssa_undef_instr_create(build
->shader
, num_components
);
69 nir_instr_insert(nir_before_block(nir_start_block(build
->impl
)),
75 static inline nir_ssa_def
*
76 nir_build_imm(nir_builder
*build
, unsigned num_components
, nir_const_value value
)
78 nir_load_const_instr
*load_const
=
79 nir_load_const_instr_create(build
->shader
, num_components
);
83 load_const
->value
= value
;
85 nir_builder_instr_insert(build
, &load_const
->instr
);
87 return &load_const
->def
;
90 static inline nir_ssa_def
*
91 nir_imm_float(nir_builder
*build
, float x
)
95 memset(&v
, 0, sizeof(v
));
98 return nir_build_imm(build
, 1, v
);
101 static inline nir_ssa_def
*
102 nir_imm_vec4(nir_builder
*build
, float x
, float y
, float z
, float w
)
106 memset(&v
, 0, sizeof(v
));
112 return nir_build_imm(build
, 4, v
);
115 static inline nir_ssa_def
*
116 nir_imm_int(nir_builder
*build
, int x
)
120 memset(&v
, 0, sizeof(v
));
123 return nir_build_imm(build
, 1, v
);
126 static inline nir_ssa_def
*
127 nir_build_alu(nir_builder
*build
, nir_op op
, nir_ssa_def
*src0
,
128 nir_ssa_def
*src1
, nir_ssa_def
*src2
, nir_ssa_def
*src3
)
130 const nir_op_info
*op_info
= &nir_op_infos
[op
];
131 nir_alu_instr
*instr
= nir_alu_instr_create(build
->shader
, op
);
135 instr
->src
[0].src
= nir_src_for_ssa(src0
);
137 instr
->src
[1].src
= nir_src_for_ssa(src1
);
139 instr
->src
[2].src
= nir_src_for_ssa(src2
);
141 instr
->src
[3].src
= nir_src_for_ssa(src3
);
143 /* Guess the number of components the destination temporary should have
144 * based on our input sizes, if it's not fixed for the op.
146 unsigned num_components
= op_info
->output_size
;
147 if (num_components
== 0) {
148 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
149 if (op_info
->input_sizes
[i
] == 0)
150 num_components
= MAX2(num_components
,
151 instr
->src
[i
].src
.ssa
->num_components
);
154 assert(num_components
!= 0);
156 /* Make sure we don't swizzle from outside of our source vector (like if a
157 * scalar value was passed into a multiply with a vector).
159 for (unsigned i
= 0; i
< op_info
->num_inputs
; i
++) {
160 for (unsigned j
= instr
->src
[i
].src
.ssa
->num_components
; j
< 4; j
++) {
161 instr
->src
[i
].swizzle
[j
] = instr
->src
[i
].src
.ssa
->num_components
- 1;
165 nir_ssa_dest_init(&instr
->instr
, &instr
->dest
.dest
, num_components
, NULL
);
166 instr
->dest
.write_mask
= (1 << num_components
) - 1;
168 nir_builder_instr_insert(build
, &instr
->instr
);
170 return &instr
->dest
.dest
.ssa
;
174 static inline nir_ssa_def * \
175 nir_##op(nir_builder *build, nir_ssa_def *src0) \
177 return nir_build_alu(build, nir_op_##op, src0, NULL, NULL, NULL); \
181 static inline nir_ssa_def * \
182 nir_##op(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1) \
184 return nir_build_alu(build, nir_op_##op, src0, src1, NULL, NULL); \
188 static inline nir_ssa_def * \
189 nir_##op(nir_builder *build, nir_ssa_def *src0, \
190 nir_ssa_def *src1, nir_ssa_def *src2) \
192 return nir_build_alu(build, nir_op_##op, src0, src1, src2, NULL); \
196 static inline nir_ssa_def * \
197 nir_##op(nir_builder *build, nir_ssa_def *src0, \
198 nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3) \
200 return nir_build_alu(build, nir_op_##op, src0, src1, src2, src3); \
203 #include "nir_builder_opcodes.h"
205 static inline nir_ssa_def
*
206 nir_vec(nir_builder
*build
, nir_ssa_def
**comp
, unsigned num_components
)
208 switch (num_components
) {
210 return nir_vec4(build
, comp
[0], comp
[1], comp
[2], comp
[3]);
212 return nir_vec3(build
, comp
[0], comp
[1], comp
[2]);
214 return nir_vec2(build
, comp
[0], comp
[1]);
218 unreachable("bad component count");
224 * Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
226 static inline nir_ssa_def
*
227 nir_fmov_alu(nir_builder
*build
, nir_alu_src src
, unsigned num_components
)
229 nir_alu_instr
*mov
= nir_alu_instr_create(build
->shader
, nir_op_fmov
);
230 nir_ssa_dest_init(&mov
->instr
, &mov
->dest
.dest
, num_components
, NULL
);
231 mov
->dest
.write_mask
= (1 << num_components
) - 1;
233 nir_builder_instr_insert(build
, &mov
->instr
);
235 return &mov
->dest
.dest
.ssa
;
238 static inline nir_ssa_def
*
239 nir_imov_alu(nir_builder
*build
, nir_alu_src src
, unsigned num_components
)
241 nir_alu_instr
*mov
= nir_alu_instr_create(build
->shader
, nir_op_imov
);
242 nir_ssa_dest_init(&mov
->instr
, &mov
->dest
.dest
, num_components
, NULL
);
243 mov
->dest
.write_mask
= (1 << num_components
) - 1;
245 nir_builder_instr_insert(build
, &mov
->instr
);
247 return &mov
->dest
.dest
.ssa
;
251 * Construct an fmov or imov that reswizzles the source's components.
253 static inline nir_ssa_def
*
254 nir_swizzle(nir_builder
*build
, nir_ssa_def
*src
, unsigned swiz
[4],
255 unsigned num_components
, bool use_fmov
)
257 nir_alu_src alu_src
= { NIR_SRC_INIT
};
258 alu_src
.src
= nir_src_for_ssa(src
);
259 for (unsigned i
= 0; i
< num_components
; i
++)
260 alu_src
.swizzle
[i
] = swiz
[i
];
262 return use_fmov
? nir_fmov_alu(build
, alu_src
, num_components
) :
263 nir_imov_alu(build
, alu_src
, num_components
);
266 /* Selects the right fdot given the number of components in each source. */
267 static inline nir_ssa_def
*
268 nir_fdot(nir_builder
*build
, nir_ssa_def
*src0
, nir_ssa_def
*src1
)
270 assert(src0
->num_components
== src1
->num_components
);
271 switch (src0
->num_components
) {
272 case 1: return nir_fmul(build
, src0
, src1
);
273 case 2: return nir_fdot2(build
, src0
, src1
);
274 case 3: return nir_fdot3(build
, src0
, src1
);
275 case 4: return nir_fdot4(build
, src0
, src1
);
277 unreachable("bad component size");
283 static inline nir_ssa_def
*
284 nir_channel(nir_builder
*b
, nir_ssa_def
*def
, unsigned c
)
286 unsigned swizzle
[4] = {c
, c
, c
, c
};
287 return nir_swizzle(b
, def
, swizzle
, 1, false);
291 * Turns a nir_src into a nir_ssa_def * so it can be passed to
292 * nir_build_alu()-based builder calls.
294 * See nir_ssa_for_alu_src() for alu instructions.
296 static inline nir_ssa_def
*
297 nir_ssa_for_src(nir_builder
*build
, nir_src src
, int num_components
)
299 if (src
.is_ssa
&& src
.ssa
->num_components
== num_components
)
302 nir_alu_src alu
= { NIR_SRC_INIT
};
304 for (int j
= 0; j
< 4; j
++)
307 return nir_imov_alu(build
, alu
, num_components
);
311 * Similar to nir_ssa_for_src(), but for alu src's, respecting the
312 * nir_alu_src's swizzle.
314 static inline nir_ssa_def
*
315 nir_ssa_for_alu_src(nir_builder
*build
, nir_alu_instr
*instr
, unsigned srcn
)
317 static uint8_t trivial_swizzle
[4] = { 0, 1, 2, 3 };
318 nir_alu_src
*src
= &instr
->src
[srcn
];
319 unsigned num_components
= nir_ssa_alu_instr_src_components(instr
, srcn
);
321 if (src
->src
.is_ssa
&& (src
->src
.ssa
->num_components
== num_components
) &&
322 !src
->abs
&& !src
->negate
&&
323 (memcmp(src
->swizzle
, trivial_swizzle
, num_components
) == 0))
326 return nir_imov_alu(build
, *src
, num_components
);
329 static inline nir_ssa_def
*
330 nir_load_var(nir_builder
*build
, nir_variable
*var
)
332 const unsigned num_components
= glsl_get_vector_elements(var
->type
);
334 nir_intrinsic_instr
*load
=
335 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_load_var
);
336 load
->num_components
= num_components
;
337 load
->variables
[0] = nir_deref_var_create(load
, var
);
338 nir_ssa_dest_init(&load
->instr
, &load
->dest
, num_components
, NULL
);
339 nir_builder_instr_insert(build
, &load
->instr
);
340 return &load
->dest
.ssa
;
344 nir_store_var(nir_builder
*build
, nir_variable
*var
, nir_ssa_def
*value
,
347 const unsigned num_components
= glsl_get_vector_elements(var
->type
);
349 nir_intrinsic_instr
*store
=
350 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_store_var
);
351 store
->num_components
= num_components
;
352 store
->const_index
[0] = writemask
;
353 store
->variables
[0] = nir_deref_var_create(store
, var
);
354 store
->src
[0] = nir_src_for_ssa(value
);
355 nir_builder_instr_insert(build
, &store
->instr
);
359 nir_copy_deref_var(nir_builder
*build
, nir_deref_var
*dest
, nir_deref_var
*src
)
361 assert(nir_deref_tail(&dest
->deref
)->type
==
362 nir_deref_tail(&src
->deref
)->type
);
364 nir_intrinsic_instr
*copy
=
365 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_copy_var
);
366 copy
->variables
[0] = nir_deref_as_var(nir_copy_deref(copy
, &dest
->deref
));
367 copy
->variables
[1] = nir_deref_as_var(nir_copy_deref(copy
, &src
->deref
));
368 nir_builder_instr_insert(build
, ©
->instr
);
372 nir_copy_var(nir_builder
*build
, nir_variable
*dest
, nir_variable
*src
)
374 nir_intrinsic_instr
*copy
=
375 nir_intrinsic_instr_create(build
->shader
, nir_intrinsic_copy_var
);
376 copy
->variables
[0] = nir_deref_var_create(copy
, dest
);
377 copy
->variables
[1] = nir_deref_var_create(copy
, src
);
378 nir_builder_instr_insert(build
, ©
->instr
);
381 static inline nir_ssa_def
*
382 nir_load_system_value(nir_builder
*build
, nir_intrinsic_op op
, int index
)
384 nir_intrinsic_instr
*load
= nir_intrinsic_instr_create(build
->shader
, op
);
385 load
->num_components
= nir_intrinsic_infos
[op
].dest_components
;
386 load
->const_index
[0] = index
;
387 nir_ssa_dest_init(&load
->instr
, &load
->dest
,
388 nir_intrinsic_infos
[op
].dest_components
, NULL
);
389 nir_builder_instr_insert(build
, &load
->instr
);
390 return &load
->dest
.ssa
;
393 #endif /* NIR_BUILDER_H */