2 * Copyright © 2016 Bas Nieuwenhuizen
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 <llvm/Config/llvm-config.h>
26 #include "ac_nir_to_llvm.h"
27 #include "ac_llvm_build.h"
28 #include "ac_llvm_util.h"
29 #include "ac_binary.h"
32 #include "nir/nir_deref.h"
33 #include "util/bitscan.h"
34 #include "util/u_math.h"
35 #include "ac_shader_abi.h"
36 #include "ac_shader_util.h"
38 struct ac_nir_context
{
39 struct ac_llvm_context ac
;
40 struct ac_shader_abi
*abi
;
41 const struct ac_shader_args
*args
;
43 gl_shader_stage stage
;
46 LLVMValueRef
*ssa_defs
;
49 LLVMValueRef constant_data
;
51 struct hash_table
*defs
;
52 struct hash_table
*phis
;
53 struct hash_table
*vars
;
54 struct hash_table
*verified_interp
;
56 LLVMValueRef main_function
;
57 LLVMBasicBlockRef continue_block
;
58 LLVMBasicBlockRef break_block
;
64 static LLVMValueRef
get_sampler_desc_index(struct ac_nir_context
*ctx
,
65 nir_deref_instr
*deref_instr
,
66 const nir_instr
*instr
,
69 static LLVMValueRef
get_sampler_desc(struct ac_nir_context
*ctx
,
70 nir_deref_instr
*deref_instr
,
71 enum ac_descriptor_type desc_type
,
72 const nir_instr
*instr
,
74 bool image
, bool write
);
77 build_store_values_extended(struct ac_llvm_context
*ac
,
80 unsigned value_stride
,
83 LLVMBuilderRef builder
= ac
->builder
;
86 for (i
= 0; i
< value_count
; i
++) {
87 LLVMValueRef ptr
= values
[i
* value_stride
];
88 LLVMValueRef index
= LLVMConstInt(ac
->i32
, i
, false);
89 LLVMValueRef value
= LLVMBuildExtractElement(builder
, vec
, index
, "");
90 LLVMBuildStore(builder
, value
, ptr
);
94 static LLVMTypeRef
get_def_type(struct ac_nir_context
*ctx
,
95 const nir_ssa_def
*def
)
97 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->ac
.context
, def
->bit_size
);
98 if (def
->num_components
> 1) {
99 type
= LLVMVectorType(type
, def
->num_components
);
104 static LLVMValueRef
get_src(struct ac_nir_context
*nir
, nir_src src
)
107 return nir
->ssa_defs
[src
.ssa
->index
];
111 get_memory_ptr(struct ac_nir_context
*ctx
, nir_src src
, unsigned bit_size
)
113 LLVMValueRef ptr
= get_src(ctx
, src
);
114 ptr
= LLVMBuildGEP(ctx
->ac
.builder
, ctx
->ac
.lds
, &ptr
, 1, "");
115 int addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
117 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->ac
.context
, bit_size
);
119 return LLVMBuildBitCast(ctx
->ac
.builder
, ptr
,
120 LLVMPointerType(type
, addr_space
), "");
123 static LLVMBasicBlockRef
get_block(struct ac_nir_context
*nir
,
124 const struct nir_block
*b
)
126 struct hash_entry
*entry
= _mesa_hash_table_search(nir
->defs
, b
);
127 return (LLVMBasicBlockRef
)entry
->data
;
130 static LLVMValueRef
get_alu_src(struct ac_nir_context
*ctx
,
132 unsigned num_components
)
134 LLVMValueRef value
= get_src(ctx
, src
.src
);
135 bool need_swizzle
= false;
138 unsigned src_components
= ac_get_llvm_num_components(value
);
139 for (unsigned i
= 0; i
< num_components
; ++i
) {
140 assert(src
.swizzle
[i
] < src_components
);
141 if (src
.swizzle
[i
] != i
)
145 if (need_swizzle
|| num_components
!= src_components
) {
146 LLVMValueRef masks
[] = {
147 LLVMConstInt(ctx
->ac
.i32
, src
.swizzle
[0], false),
148 LLVMConstInt(ctx
->ac
.i32
, src
.swizzle
[1], false),
149 LLVMConstInt(ctx
->ac
.i32
, src
.swizzle
[2], false),
150 LLVMConstInt(ctx
->ac
.i32
, src
.swizzle
[3], false)};
152 if (src_components
> 1 && num_components
== 1) {
153 value
= LLVMBuildExtractElement(ctx
->ac
.builder
, value
,
155 } else if (src_components
== 1 && num_components
> 1) {
156 LLVMValueRef values
[] = {value
, value
, value
, value
};
157 value
= ac_build_gather_values(&ctx
->ac
, values
, num_components
);
159 LLVMValueRef swizzle
= LLVMConstVector(masks
, num_components
);
160 value
= LLVMBuildShuffleVector(ctx
->ac
.builder
, value
, value
,
169 static LLVMValueRef
emit_int_cmp(struct ac_llvm_context
*ctx
,
170 LLVMIntPredicate pred
, LLVMValueRef src0
,
173 LLVMValueRef result
= LLVMBuildICmp(ctx
->builder
, pred
, src0
, src1
, "");
174 return LLVMBuildSelect(ctx
->builder
, result
,
175 LLVMConstInt(ctx
->i32
, 0xFFFFFFFF, false),
179 static LLVMValueRef
emit_float_cmp(struct ac_llvm_context
*ctx
,
180 LLVMRealPredicate pred
, LLVMValueRef src0
,
184 src0
= ac_to_float(ctx
, src0
);
185 src1
= ac_to_float(ctx
, src1
);
186 result
= LLVMBuildFCmp(ctx
->builder
, pred
, src0
, src1
, "");
187 return LLVMBuildSelect(ctx
->builder
, result
,
188 LLVMConstInt(ctx
->i32
, 0xFFFFFFFF, false),
192 static LLVMValueRef
emit_intrin_1f_param(struct ac_llvm_context
*ctx
,
194 LLVMTypeRef result_type
,
197 char name
[64], type
[64];
198 LLVMValueRef params
[] = {
199 ac_to_float(ctx
, src0
),
202 ac_build_type_name_for_intr(LLVMTypeOf(params
[0]), type
, sizeof(type
));
203 ASSERTED
const int length
= snprintf(name
, sizeof(name
), "%s.%s", intrin
, type
);
204 assert(length
< sizeof(name
));
205 return ac_build_intrinsic(ctx
, name
, result_type
, params
, 1, AC_FUNC_ATTR_READNONE
);
208 static LLVMValueRef
emit_intrin_2f_param(struct ac_llvm_context
*ctx
,
210 LLVMTypeRef result_type
,
211 LLVMValueRef src0
, LLVMValueRef src1
)
213 char name
[64], type
[64];
214 LLVMValueRef params
[] = {
215 ac_to_float(ctx
, src0
),
216 ac_to_float(ctx
, src1
),
219 ac_build_type_name_for_intr(LLVMTypeOf(params
[0]), type
, sizeof(type
));
220 ASSERTED
const int length
= snprintf(name
, sizeof(name
), "%s.%s", intrin
, type
);
221 assert(length
< sizeof(name
));
222 return ac_build_intrinsic(ctx
, name
, result_type
, params
, 2, AC_FUNC_ATTR_READNONE
);
225 static LLVMValueRef
emit_intrin_3f_param(struct ac_llvm_context
*ctx
,
227 LLVMTypeRef result_type
,
228 LLVMValueRef src0
, LLVMValueRef src1
, LLVMValueRef src2
)
230 char name
[64], type
[64];
231 LLVMValueRef params
[] = {
232 ac_to_float(ctx
, src0
),
233 ac_to_float(ctx
, src1
),
234 ac_to_float(ctx
, src2
),
237 ac_build_type_name_for_intr(LLVMTypeOf(params
[0]), type
, sizeof(type
));
238 ASSERTED
const int length
= snprintf(name
, sizeof(name
), "%s.%s", intrin
, type
);
239 assert(length
< sizeof(name
));
240 return ac_build_intrinsic(ctx
, name
, result_type
, params
, 3, AC_FUNC_ATTR_READNONE
);
243 static LLVMValueRef
emit_bcsel(struct ac_llvm_context
*ctx
,
244 LLVMValueRef src0
, LLVMValueRef src1
, LLVMValueRef src2
)
246 LLVMTypeRef src1_type
= LLVMTypeOf(src1
);
247 LLVMTypeRef src2_type
= LLVMTypeOf(src2
);
249 assert(LLVMGetTypeKind(LLVMTypeOf(src0
)) != LLVMVectorTypeKind
);
251 if (LLVMGetTypeKind(src1_type
) == LLVMPointerTypeKind
&&
252 LLVMGetTypeKind(src2_type
) != LLVMPointerTypeKind
) {
253 src2
= LLVMBuildIntToPtr(ctx
->builder
, src2
, src1_type
, "");
254 } else if (LLVMGetTypeKind(src2_type
) == LLVMPointerTypeKind
&&
255 LLVMGetTypeKind(src1_type
) != LLVMPointerTypeKind
) {
256 src1
= LLVMBuildIntToPtr(ctx
->builder
, src1
, src2_type
, "");
259 LLVMValueRef v
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, src0
,
261 return LLVMBuildSelect(ctx
->builder
, v
,
262 ac_to_integer_or_pointer(ctx
, src1
),
263 ac_to_integer_or_pointer(ctx
, src2
), "");
266 static LLVMValueRef
emit_iabs(struct ac_llvm_context
*ctx
,
269 return ac_build_imax(ctx
, src0
, LLVMBuildNeg(ctx
->builder
, src0
, ""));
272 static LLVMValueRef
emit_uint_carry(struct ac_llvm_context
*ctx
,
274 LLVMValueRef src0
, LLVMValueRef src1
)
276 LLVMTypeRef ret_type
;
277 LLVMTypeRef types
[] = { ctx
->i32
, ctx
->i1
};
279 LLVMValueRef params
[] = { src0
, src1
};
280 ret_type
= LLVMStructTypeInContext(ctx
->context
, types
,
283 res
= ac_build_intrinsic(ctx
, intrin
, ret_type
,
284 params
, 2, AC_FUNC_ATTR_READNONE
);
286 res
= LLVMBuildExtractValue(ctx
->builder
, res
, 1, "");
287 res
= LLVMBuildZExt(ctx
->builder
, res
, ctx
->i32
, "");
291 static LLVMValueRef
emit_b2f(struct ac_llvm_context
*ctx
,
295 LLVMValueRef result
= LLVMBuildAnd(ctx
->builder
, src0
,
296 LLVMBuildBitCast(ctx
->builder
, LLVMConstReal(ctx
->f32
, 1.0), ctx
->i32
, ""),
298 result
= LLVMBuildBitCast(ctx
->builder
, result
, ctx
->f32
, "");
302 return LLVMBuildFPTrunc(ctx
->builder
, result
, ctx
->f16
, "");
306 return LLVMBuildFPExt(ctx
->builder
, result
, ctx
->f64
, "");
308 unreachable("Unsupported bit size.");
312 static LLVMValueRef
emit_f2b(struct ac_llvm_context
*ctx
,
315 src0
= ac_to_float(ctx
, src0
);
316 LLVMValueRef zero
= LLVMConstNull(LLVMTypeOf(src0
));
317 return LLVMBuildSExt(ctx
->builder
,
318 LLVMBuildFCmp(ctx
->builder
, LLVMRealUNE
, src0
, zero
, ""),
322 static LLVMValueRef
emit_b2i(struct ac_llvm_context
*ctx
,
326 LLVMValueRef result
= LLVMBuildAnd(ctx
->builder
, src0
, ctx
->i32_1
, "");
330 return LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i8
, "");
332 return LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i16
, "");
336 return LLVMBuildZExt(ctx
->builder
, result
, ctx
->i64
, "");
338 unreachable("Unsupported bit size.");
342 static LLVMValueRef
emit_i2b(struct ac_llvm_context
*ctx
,
345 LLVMValueRef zero
= LLVMConstNull(LLVMTypeOf(src0
));
346 return LLVMBuildSExt(ctx
->builder
,
347 LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, src0
, zero
, ""),
351 static LLVMValueRef
emit_f2f16(struct ac_llvm_context
*ctx
,
355 LLVMValueRef cond
= NULL
;
357 src0
= ac_to_float(ctx
, src0
);
358 result
= LLVMBuildFPTrunc(ctx
->builder
, src0
, ctx
->f16
, "");
360 if (ctx
->chip_class
>= GFX8
) {
361 LLVMValueRef args
[2];
362 /* Check if the result is a denormal - and flush to 0 if so. */
364 args
[1] = LLVMConstInt(ctx
->i32
, N_SUBNORMAL
| P_SUBNORMAL
, false);
365 cond
= ac_build_intrinsic(ctx
, "llvm.amdgcn.class.f16", ctx
->i1
, args
, 2, AC_FUNC_ATTR_READNONE
);
368 /* need to convert back up to f32 */
369 result
= LLVMBuildFPExt(ctx
->builder
, result
, ctx
->f32
, "");
371 if (ctx
->chip_class
>= GFX8
)
372 result
= LLVMBuildSelect(ctx
->builder
, cond
, ctx
->f32_0
, result
, "");
375 /* 0x38800000 is smallest half float value (2^-14) in 32-bit float,
376 * so compare the result and flush to 0 if it's smaller.
378 LLVMValueRef temp
, cond2
;
379 temp
= emit_intrin_1f_param(ctx
, "llvm.fabs", ctx
->f32
, result
);
380 cond
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGT
,
381 LLVMBuildBitCast(ctx
->builder
, LLVMConstInt(ctx
->i32
, 0x38800000, false), ctx
->f32
, ""),
383 cond2
= LLVMBuildFCmp(ctx
->builder
, LLVMRealONE
,
384 temp
, ctx
->f32_0
, "");
385 cond
= LLVMBuildAnd(ctx
->builder
, cond
, cond2
, "");
386 result
= LLVMBuildSelect(ctx
->builder
, cond
, ctx
->f32_0
, result
, "");
391 static LLVMValueRef
emit_umul_high(struct ac_llvm_context
*ctx
,
392 LLVMValueRef src0
, LLVMValueRef src1
)
394 LLVMValueRef dst64
, result
;
395 src0
= LLVMBuildZExt(ctx
->builder
, src0
, ctx
->i64
, "");
396 src1
= LLVMBuildZExt(ctx
->builder
, src1
, ctx
->i64
, "");
398 dst64
= LLVMBuildMul(ctx
->builder
, src0
, src1
, "");
399 dst64
= LLVMBuildLShr(ctx
->builder
, dst64
, LLVMConstInt(ctx
->i64
, 32, false), "");
400 result
= LLVMBuildTrunc(ctx
->builder
, dst64
, ctx
->i32
, "");
404 static LLVMValueRef
emit_imul_high(struct ac_llvm_context
*ctx
,
405 LLVMValueRef src0
, LLVMValueRef src1
)
407 LLVMValueRef dst64
, result
;
408 src0
= LLVMBuildSExt(ctx
->builder
, src0
, ctx
->i64
, "");
409 src1
= LLVMBuildSExt(ctx
->builder
, src1
, ctx
->i64
, "");
411 dst64
= LLVMBuildMul(ctx
->builder
, src0
, src1
, "");
412 dst64
= LLVMBuildAShr(ctx
->builder
, dst64
, LLVMConstInt(ctx
->i64
, 32, false), "");
413 result
= LLVMBuildTrunc(ctx
->builder
, dst64
, ctx
->i32
, "");
417 static LLVMValueRef
emit_bfm(struct ac_llvm_context
*ctx
,
418 LLVMValueRef bits
, LLVMValueRef offset
)
420 /* mask = ((1 << bits) - 1) << offset */
421 return LLVMBuildShl(ctx
->builder
,
422 LLVMBuildSub(ctx
->builder
,
423 LLVMBuildShl(ctx
->builder
,
430 static LLVMValueRef
emit_bitfield_select(struct ac_llvm_context
*ctx
,
431 LLVMValueRef mask
, LLVMValueRef insert
,
435 * (mask & insert) | (~mask & base) = base ^ (mask & (insert ^ base))
436 * Use the right-hand side, which the LLVM backend can convert to V_BFI.
438 return LLVMBuildXor(ctx
->builder
, base
,
439 LLVMBuildAnd(ctx
->builder
, mask
,
440 LLVMBuildXor(ctx
->builder
, insert
, base
, ""), ""), "");
443 static LLVMValueRef
emit_pack_2x16(struct ac_llvm_context
*ctx
,
445 LLVMValueRef (*pack
)(struct ac_llvm_context
*ctx
,
446 LLVMValueRef args
[2]))
448 LLVMValueRef comp
[2];
450 src0
= ac_to_float(ctx
, src0
);
451 comp
[0] = LLVMBuildExtractElement(ctx
->builder
, src0
, ctx
->i32_0
, "");
452 comp
[1] = LLVMBuildExtractElement(ctx
->builder
, src0
, ctx
->i32_1
, "");
454 return LLVMBuildBitCast(ctx
->builder
, pack(ctx
, comp
), ctx
->i32
, "");
457 static LLVMValueRef
emit_unpack_half_2x16(struct ac_llvm_context
*ctx
,
460 LLVMValueRef const16
= LLVMConstInt(ctx
->i32
, 16, false);
461 LLVMValueRef temps
[2], val
;
464 for (i
= 0; i
< 2; i
++) {
465 val
= i
== 1 ? LLVMBuildLShr(ctx
->builder
, src0
, const16
, "") : src0
;
466 val
= LLVMBuildTrunc(ctx
->builder
, val
, ctx
->i16
, "");
467 val
= LLVMBuildBitCast(ctx
->builder
, val
, ctx
->f16
, "");
468 temps
[i
] = LLVMBuildFPExt(ctx
->builder
, val
, ctx
->f32
, "");
470 return ac_build_gather_values(ctx
, temps
, 2);
473 static LLVMValueRef
emit_ddxy(struct ac_nir_context
*ctx
,
481 if (op
== nir_op_fddx_fine
)
482 mask
= AC_TID_MASK_LEFT
;
483 else if (op
== nir_op_fddy_fine
)
484 mask
= AC_TID_MASK_TOP
;
486 mask
= AC_TID_MASK_TOP_LEFT
;
488 /* for DDX we want to next X pixel, DDY next Y pixel. */
489 if (op
== nir_op_fddx_fine
||
490 op
== nir_op_fddx_coarse
||
496 result
= ac_build_ddxy(&ctx
->ac
, mask
, idx
, src0
);
500 struct waterfall_context
{
501 LLVMBasicBlockRef phi_bb
[2];
505 /* To deal with divergent descriptors we can create a loop that handles all
506 * lanes with the same descriptor on a given iteration (henceforth a
509 * These helper create the begin and end of the loop leaving the caller
510 * to implement the body.
513 * - ctx is the usal nir context
514 * - wctx is a temporary struct containing some loop info. Can be left uninitialized.
515 * - value is the possibly divergent value for which we built the loop
516 * - divergent is whether value is actually divergent. If false we just pass
519 static LLVMValueRef
enter_waterfall(struct ac_nir_context
*ctx
,
520 struct waterfall_context
*wctx
,
521 LLVMValueRef value
, bool divergent
)
523 /* If the app claims the value is divergent but it is constant we can
524 * end up with a dynamic index of NULL. */
528 wctx
->use_waterfall
= divergent
;
532 ac_build_bgnloop(&ctx
->ac
, 6000);
534 LLVMValueRef scalar_value
= ac_build_readlane(&ctx
->ac
, value
, NULL
);
536 LLVMValueRef active
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntEQ
, value
,
537 scalar_value
, "uniform_active");
539 wctx
->phi_bb
[0] = LLVMGetInsertBlock(ctx
->ac
.builder
);
540 ac_build_ifcc(&ctx
->ac
, active
, 6001);
545 static LLVMValueRef
exit_waterfall(struct ac_nir_context
*ctx
,
546 struct waterfall_context
*wctx
,
549 LLVMValueRef ret
= NULL
;
550 LLVMValueRef phi_src
[2];
551 LLVMValueRef cc_phi_src
[2] = {
552 LLVMConstInt(ctx
->ac
.i32
, 0, false),
553 LLVMConstInt(ctx
->ac
.i32
, 0xffffffff, false),
556 if (!wctx
->use_waterfall
)
559 wctx
->phi_bb
[1] = LLVMGetInsertBlock(ctx
->ac
.builder
);
561 ac_build_endif(&ctx
->ac
, 6001);
564 phi_src
[0] = LLVMGetUndef(LLVMTypeOf(value
));
567 ret
= ac_build_phi(&ctx
->ac
, LLVMTypeOf(value
), 2, phi_src
, wctx
->phi_bb
);
571 * By using the optimization barrier on the exit decision, we decouple
572 * the operations from the break, and hence avoid LLVM hoisting the
573 * opteration into the break block.
575 LLVMValueRef cc
= ac_build_phi(&ctx
->ac
, ctx
->ac
.i32
, 2, cc_phi_src
, wctx
->phi_bb
);
576 ac_build_optimization_barrier(&ctx
->ac
, &cc
);
578 LLVMValueRef active
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntNE
, cc
, ctx
->ac
.i32_0
, "uniform_active2");
579 ac_build_ifcc(&ctx
->ac
, active
, 6002);
580 ac_build_break(&ctx
->ac
);
581 ac_build_endif(&ctx
->ac
, 6002);
583 ac_build_endloop(&ctx
->ac
, 6000);
587 static void visit_alu(struct ac_nir_context
*ctx
, const nir_alu_instr
*instr
)
589 LLVMValueRef src
[4], result
= NULL
;
590 unsigned num_components
= instr
->dest
.dest
.ssa
.num_components
;
591 unsigned src_components
;
592 LLVMTypeRef def_type
= get_def_type(ctx
, &instr
->dest
.dest
.ssa
);
593 bool saved_inexact
= false;
596 saved_inexact
= ac_disable_inexact_math(ctx
->ac
.builder
);
598 assert(nir_op_infos
[instr
->op
].num_inputs
<= ARRAY_SIZE(src
));
605 case nir_op_pack_half_2x16
:
606 case nir_op_pack_snorm_2x16
:
607 case nir_op_pack_unorm_2x16
:
610 case nir_op_unpack_half_2x16
:
613 case nir_op_cube_face_coord
:
614 case nir_op_cube_face_index
:
618 src_components
= num_components
;
621 for (unsigned i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++)
622 src
[i
] = get_alu_src(ctx
, instr
->src
[i
], src_components
);
629 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
630 result
= LLVMBuildFNeg(ctx
->ac
.builder
, src
[0], "");
631 if (ctx
->ac
.float_mode
== AC_FLOAT_MODE_DENORM_FLUSH_TO_ZERO
) {
632 /* fneg will be optimized by backend compiler with sign
633 * bit removed via XOR. This is probably a LLVM bug.
635 result
= ac_build_canonicalize(&ctx
->ac
, result
,
636 instr
->dest
.dest
.ssa
.bit_size
);
640 result
= LLVMBuildNeg(ctx
->ac
.builder
, src
[0], "");
643 result
= LLVMBuildNot(ctx
->ac
.builder
, src
[0], "");
646 result
= LLVMBuildAdd(ctx
->ac
.builder
, src
[0], src
[1], "");
649 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
650 src
[1] = ac_to_float(&ctx
->ac
, src
[1]);
651 result
= LLVMBuildFAdd(ctx
->ac
.builder
, src
[0], src
[1], "");
654 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
655 src
[1] = ac_to_float(&ctx
->ac
, src
[1]);
656 result
= LLVMBuildFSub(ctx
->ac
.builder
, src
[0], src
[1], "");
659 result
= LLVMBuildSub(ctx
->ac
.builder
, src
[0], src
[1], "");
662 result
= LLVMBuildMul(ctx
->ac
.builder
, src
[0], src
[1], "");
665 result
= LLVMBuildSRem(ctx
->ac
.builder
, src
[0], src
[1], "");
668 result
= LLVMBuildURem(ctx
->ac
.builder
, src
[0], src
[1], "");
671 /* lower_fmod only lower 16-bit and 32-bit fmod */
672 assert(instr
->dest
.dest
.ssa
.bit_size
== 64);
673 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
674 src
[1] = ac_to_float(&ctx
->ac
, src
[1]);
675 result
= ac_build_fdiv(&ctx
->ac
, src
[0], src
[1]);
676 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.floor",
677 ac_to_float_type(&ctx
->ac
, def_type
), result
);
678 result
= LLVMBuildFMul(ctx
->ac
.builder
, src
[1] , result
, "");
679 result
= LLVMBuildFSub(ctx
->ac
.builder
, src
[0], result
, "");
682 result
= LLVMBuildSRem(ctx
->ac
.builder
, src
[0], src
[1], "");
685 result
= LLVMBuildSDiv(ctx
->ac
.builder
, src
[0], src
[1], "");
688 result
= LLVMBuildUDiv(ctx
->ac
.builder
, src
[0], src
[1], "");
691 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
692 src
[1] = ac_to_float(&ctx
->ac
, src
[1]);
693 result
= LLVMBuildFMul(ctx
->ac
.builder
, src
[0], src
[1], "");
696 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.amdgcn.rcp",
697 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
700 result
= LLVMBuildAnd(ctx
->ac
.builder
, src
[0], src
[1], "");
703 result
= LLVMBuildOr(ctx
->ac
.builder
, src
[0], src
[1], "");
706 result
= LLVMBuildXor(ctx
->ac
.builder
, src
[0], src
[1], "");
709 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) < ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
710 src
[1] = LLVMBuildZExt(ctx
->ac
.builder
, src
[1],
711 LLVMTypeOf(src
[0]), "");
712 else if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) > ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
713 src
[1] = LLVMBuildTrunc(ctx
->ac
.builder
, src
[1],
714 LLVMTypeOf(src
[0]), "");
715 result
= LLVMBuildShl(ctx
->ac
.builder
, src
[0], src
[1], "");
718 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) < ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
719 src
[1] = LLVMBuildZExt(ctx
->ac
.builder
, src
[1],
720 LLVMTypeOf(src
[0]), "");
721 else if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) > ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
722 src
[1] = LLVMBuildTrunc(ctx
->ac
.builder
, src
[1],
723 LLVMTypeOf(src
[0]), "");
724 result
= LLVMBuildAShr(ctx
->ac
.builder
, src
[0], src
[1], "");
727 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) < ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
728 src
[1] = LLVMBuildZExt(ctx
->ac
.builder
, src
[1],
729 LLVMTypeOf(src
[0]), "");
730 else if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[1])) > ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])))
731 src
[1] = LLVMBuildTrunc(ctx
->ac
.builder
, src
[1],
732 LLVMTypeOf(src
[0]), "");
733 result
= LLVMBuildLShr(ctx
->ac
.builder
, src
[0], src
[1], "");
736 result
= emit_int_cmp(&ctx
->ac
, LLVMIntSLT
, src
[0], src
[1]);
739 result
= emit_int_cmp(&ctx
->ac
, LLVMIntNE
, src
[0], src
[1]);
742 result
= emit_int_cmp(&ctx
->ac
, LLVMIntEQ
, src
[0], src
[1]);
745 result
= emit_int_cmp(&ctx
->ac
, LLVMIntSGE
, src
[0], src
[1]);
748 result
= emit_int_cmp(&ctx
->ac
, LLVMIntULT
, src
[0], src
[1]);
751 result
= emit_int_cmp(&ctx
->ac
, LLVMIntUGE
, src
[0], src
[1]);
754 result
= emit_float_cmp(&ctx
->ac
, LLVMRealOEQ
, src
[0], src
[1]);
757 result
= emit_float_cmp(&ctx
->ac
, LLVMRealUNE
, src
[0], src
[1]);
760 result
= emit_float_cmp(&ctx
->ac
, LLVMRealOLT
, src
[0], src
[1]);
763 result
= emit_float_cmp(&ctx
->ac
, LLVMRealOGE
, src
[0], src
[1]);
766 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.fabs",
767 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
768 if (ctx
->ac
.float_mode
== AC_FLOAT_MODE_DENORM_FLUSH_TO_ZERO
) {
769 /* fabs will be optimized by backend compiler with sign
770 * bit removed via AND.
772 result
= ac_build_canonicalize(&ctx
->ac
, result
,
773 instr
->dest
.dest
.ssa
.bit_size
);
777 result
= emit_iabs(&ctx
->ac
, src
[0]);
780 result
= ac_build_imax(&ctx
->ac
, src
[0], src
[1]);
783 result
= ac_build_imin(&ctx
->ac
, src
[0], src
[1]);
786 result
= ac_build_umax(&ctx
->ac
, src
[0], src
[1]);
789 result
= ac_build_umin(&ctx
->ac
, src
[0], src
[1]);
792 result
= ac_build_isign(&ctx
->ac
, src
[0],
793 instr
->dest
.dest
.ssa
.bit_size
);
796 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
797 result
= ac_build_fsign(&ctx
->ac
, src
[0],
798 instr
->dest
.dest
.ssa
.bit_size
);
801 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.floor",
802 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
805 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.trunc",
806 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
809 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.ceil",
810 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
812 case nir_op_fround_even
:
813 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.rint",
814 ac_to_float_type(&ctx
->ac
, def_type
),src
[0]);
817 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
818 result
= ac_build_fract(&ctx
->ac
, src
[0],
819 instr
->dest
.dest
.ssa
.bit_size
);
822 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.sin",
823 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
826 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.cos",
827 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
830 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.sqrt",
831 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
834 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.exp2",
835 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
838 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.log2",
839 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
842 result
= emit_intrin_1f_param(&ctx
->ac
, "llvm.amdgcn.rsq",
843 ac_to_float_type(&ctx
->ac
, def_type
), src
[0]);
845 case nir_op_frexp_exp
:
846 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
847 result
= ac_build_frexp_exp(&ctx
->ac
, src
[0],
848 ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])));
849 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])) == 16)
850 result
= LLVMBuildSExt(ctx
->ac
.builder
, result
,
853 case nir_op_frexp_sig
:
854 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
855 result
= ac_build_frexp_mant(&ctx
->ac
, src
[0],
856 instr
->dest
.dest
.ssa
.bit_size
);
859 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.pow",
860 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1]);
863 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.maxnum",
864 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1]);
865 if (ctx
->ac
.chip_class
< GFX9
&&
866 instr
->dest
.dest
.ssa
.bit_size
== 32) {
867 /* Only pre-GFX9 chips do not flush denorms. */
868 result
= ac_build_canonicalize(&ctx
->ac
, result
,
869 instr
->dest
.dest
.ssa
.bit_size
);
873 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.minnum",
874 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1]);
875 if (ctx
->ac
.chip_class
< GFX9
&&
876 instr
->dest
.dest
.ssa
.bit_size
== 32) {
877 /* Only pre-GFX9 chips do not flush denorms. */
878 result
= ac_build_canonicalize(&ctx
->ac
, result
,
879 instr
->dest
.dest
.ssa
.bit_size
);
883 /* FMA is better on GFX10, because it has FMA units instead of MUL-ADD units. */
884 result
= emit_intrin_3f_param(&ctx
->ac
, ctx
->ac
.chip_class
>= GFX10
? "llvm.fma" : "llvm.fmuladd",
885 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1], src
[2]);
888 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
889 if (ac_get_elem_bits(&ctx
->ac
, def_type
) == 32)
890 result
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.ldexp.f32", ctx
->ac
.f32
, src
, 2, AC_FUNC_ATTR_READNONE
);
891 else if (ac_get_elem_bits(&ctx
->ac
, def_type
) == 16)
892 result
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.ldexp.f16", ctx
->ac
.f16
, src
, 2, AC_FUNC_ATTR_READNONE
);
894 result
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.ldexp.f64", ctx
->ac
.f64
, src
, 2, AC_FUNC_ATTR_READNONE
);
897 result
= emit_bfm(&ctx
->ac
, src
[0], src
[1]);
899 case nir_op_bitfield_select
:
900 result
= emit_bitfield_select(&ctx
->ac
, src
[0], src
[1], src
[2]);
903 result
= ac_build_bfe(&ctx
->ac
, src
[0], src
[1], src
[2], false);
906 result
= ac_build_bfe(&ctx
->ac
, src
[0], src
[1], src
[2], true);
908 case nir_op_bitfield_reverse
:
909 result
= ac_build_bitfield_reverse(&ctx
->ac
, src
[0]);
911 case nir_op_bit_count
:
912 result
= ac_build_bit_count(&ctx
->ac
, src
[0]);
917 for (unsigned i
= 0; i
< nir_op_infos
[instr
->op
].num_inputs
; i
++)
918 src
[i
] = ac_to_integer(&ctx
->ac
, src
[i
]);
919 result
= ac_build_gather_values(&ctx
->ac
, src
, num_components
);
925 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
926 result
= LLVMBuildFPToSI(ctx
->ac
.builder
, src
[0], def_type
, "");
932 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
933 result
= LLVMBuildFPToUI(ctx
->ac
.builder
, src
[0], def_type
, "");
938 result
= LLVMBuildSIToFP(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
943 result
= LLVMBuildUIToFP(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
945 case nir_op_f2f16_rtz
:
948 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
950 /* For OpenGL, we want fast packing with v_cvt_pkrtz_f16, but if we use it,
951 * all f32->f16 conversions have to round towards zero, because both scalar
952 * and vec2 down-conversions have to round equally.
954 if (ctx
->ac
.float_mode
== AC_FLOAT_MODE_DEFAULT_OPENGL
||
955 instr
->op
== nir_op_f2f16_rtz
) {
956 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
958 if (LLVMTypeOf(src
[0]) == ctx
->ac
.f64
)
959 src
[0] = LLVMBuildFPTrunc(ctx
->ac
.builder
, src
[0], ctx
->ac
.f32
, "");
961 /* Fast path conversion. This only works if NIR is vectorized
964 if (LLVMTypeOf(src
[0]) == ctx
->ac
.v2f32
) {
965 LLVMValueRef args
[] = {
966 ac_llvm_extract_elem(&ctx
->ac
, src
[0], 0),
967 ac_llvm_extract_elem(&ctx
->ac
, src
[0], 1),
969 result
= ac_build_cvt_pkrtz_f16(&ctx
->ac
, args
);
973 assert(ac_get_llvm_num_components(src
[0]) == 1);
974 LLVMValueRef param
[2] = { src
[0], LLVMGetUndef(ctx
->ac
.f32
) };
975 result
= ac_build_cvt_pkrtz_f16(&ctx
->ac
, param
);
976 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, ctx
->ac
.i32_0
, "");
978 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])) < ac_get_elem_bits(&ctx
->ac
, def_type
))
979 result
= LLVMBuildFPExt(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
981 result
= LLVMBuildFPTrunc(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
984 case nir_op_f2f16_rtne
:
987 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
988 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])) < ac_get_elem_bits(&ctx
->ac
, def_type
))
989 result
= LLVMBuildFPExt(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
991 result
= LLVMBuildFPTrunc(ctx
->ac
.builder
, src
[0], ac_to_float_type(&ctx
->ac
, def_type
), "");
998 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])) < ac_get_elem_bits(&ctx
->ac
, def_type
))
999 result
= LLVMBuildZExt(ctx
->ac
.builder
, src
[0], def_type
, "");
1001 result
= LLVMBuildTrunc(ctx
->ac
.builder
, src
[0], def_type
, "");
1008 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
[0])) < ac_get_elem_bits(&ctx
->ac
, def_type
))
1009 result
= LLVMBuildSExt(ctx
->ac
.builder
, src
[0], def_type
, "");
1011 result
= LLVMBuildTrunc(ctx
->ac
.builder
, src
[0], def_type
, "");
1013 case nir_op_b32csel
:
1014 result
= emit_bcsel(&ctx
->ac
, src
[0], src
[1], src
[2]);
1016 case nir_op_find_lsb
:
1017 result
= ac_find_lsb(&ctx
->ac
, ctx
->ac
.i32
, src
[0]);
1019 case nir_op_ufind_msb
:
1020 result
= ac_build_umsb(&ctx
->ac
, src
[0], ctx
->ac
.i32
);
1022 case nir_op_ifind_msb
:
1023 result
= ac_build_imsb(&ctx
->ac
, src
[0], ctx
->ac
.i32
);
1025 case nir_op_uadd_carry
:
1026 result
= emit_uint_carry(&ctx
->ac
, "llvm.uadd.with.overflow.i32", src
[0], src
[1]);
1028 case nir_op_usub_borrow
:
1029 result
= emit_uint_carry(&ctx
->ac
, "llvm.usub.with.overflow.i32", src
[0], src
[1]);
1034 result
= emit_b2f(&ctx
->ac
, src
[0], instr
->dest
.dest
.ssa
.bit_size
);
1037 result
= emit_f2b(&ctx
->ac
, src
[0]);
1043 result
= emit_b2i(&ctx
->ac
, src
[0], instr
->dest
.dest
.ssa
.bit_size
);
1046 result
= emit_i2b(&ctx
->ac
, src
[0]);
1048 case nir_op_fquantize2f16
:
1049 result
= emit_f2f16(&ctx
->ac
, src
[0]);
1051 case nir_op_umul_high
:
1052 result
= emit_umul_high(&ctx
->ac
, src
[0], src
[1]);
1054 case nir_op_imul_high
:
1055 result
= emit_imul_high(&ctx
->ac
, src
[0], src
[1]);
1057 case nir_op_pack_half_2x16
:
1058 result
= emit_pack_2x16(&ctx
->ac
, src
[0], ac_build_cvt_pkrtz_f16
);
1060 case nir_op_pack_snorm_2x16
:
1061 result
= emit_pack_2x16(&ctx
->ac
, src
[0], ac_build_cvt_pknorm_i16
);
1063 case nir_op_pack_unorm_2x16
:
1064 result
= emit_pack_2x16(&ctx
->ac
, src
[0], ac_build_cvt_pknorm_u16
);
1066 case nir_op_unpack_half_2x16
:
1067 result
= emit_unpack_half_2x16(&ctx
->ac
, src
[0]);
1071 case nir_op_fddx_fine
:
1072 case nir_op_fddy_fine
:
1073 case nir_op_fddx_coarse
:
1074 case nir_op_fddy_coarse
:
1075 result
= emit_ddxy(ctx
, instr
->op
, src
[0]);
1078 case nir_op_unpack_64_2x32_split_x
: {
1079 assert(ac_get_llvm_num_components(src
[0]) == 1);
1080 LLVMValueRef tmp
= LLVMBuildBitCast(ctx
->ac
.builder
, src
[0],
1083 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, tmp
,
1088 case nir_op_unpack_64_2x32_split_y
: {
1089 assert(ac_get_llvm_num_components(src
[0]) == 1);
1090 LLVMValueRef tmp
= LLVMBuildBitCast(ctx
->ac
.builder
, src
[0],
1093 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, tmp
,
1098 case nir_op_pack_64_2x32_split
: {
1099 LLVMValueRef tmp
= ac_build_gather_values(&ctx
->ac
, src
, 2);
1100 result
= LLVMBuildBitCast(ctx
->ac
.builder
, tmp
, ctx
->ac
.i64
, "");
1104 case nir_op_pack_32_2x16_split
: {
1105 LLVMValueRef tmp
= ac_build_gather_values(&ctx
->ac
, src
, 2);
1106 result
= LLVMBuildBitCast(ctx
->ac
.builder
, tmp
, ctx
->ac
.i32
, "");
1110 case nir_op_unpack_32_2x16_split_x
: {
1111 LLVMValueRef tmp
= LLVMBuildBitCast(ctx
->ac
.builder
, src
[0],
1114 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, tmp
,
1119 case nir_op_unpack_32_2x16_split_y
: {
1120 LLVMValueRef tmp
= LLVMBuildBitCast(ctx
->ac
.builder
, src
[0],
1123 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, tmp
,
1128 case nir_op_cube_face_coord
: {
1129 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
1130 LLVMValueRef results
[2];
1132 for (unsigned chan
= 0; chan
< 3; chan
++)
1133 in
[chan
] = ac_llvm_extract_elem(&ctx
->ac
, src
[0], chan
);
1134 results
[0] = ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.cubesc",
1135 ctx
->ac
.f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
1136 results
[1] = ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.cubetc",
1137 ctx
->ac
.f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
1138 LLVMValueRef ma
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.cubema",
1139 ctx
->ac
.f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
1140 results
[0] = ac_build_fdiv(&ctx
->ac
, results
[0], ma
);
1141 results
[1] = ac_build_fdiv(&ctx
->ac
, results
[1], ma
);
1142 LLVMValueRef offset
= LLVMConstReal(ctx
->ac
.f32
, 0.5);
1143 results
[0] = LLVMBuildFAdd(ctx
->ac
.builder
, results
[0], offset
, "");
1144 results
[1] = LLVMBuildFAdd(ctx
->ac
.builder
, results
[1], offset
, "");
1145 result
= ac_build_gather_values(&ctx
->ac
, results
, 2);
1149 case nir_op_cube_face_index
: {
1150 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
1152 for (unsigned chan
= 0; chan
< 3; chan
++)
1153 in
[chan
] = ac_llvm_extract_elem(&ctx
->ac
, src
[0], chan
);
1154 result
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.cubeid",
1155 ctx
->ac
.f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
1160 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.minnum",
1161 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1]);
1162 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.minnum",
1163 ac_to_float_type(&ctx
->ac
, def_type
), result
, src
[2]);
1166 result
= ac_build_umin(&ctx
->ac
, src
[0], src
[1]);
1167 result
= ac_build_umin(&ctx
->ac
, result
, src
[2]);
1170 result
= ac_build_imin(&ctx
->ac
, src
[0], src
[1]);
1171 result
= ac_build_imin(&ctx
->ac
, result
, src
[2]);
1174 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.maxnum",
1175 ac_to_float_type(&ctx
->ac
, def_type
), src
[0], src
[1]);
1176 result
= emit_intrin_2f_param(&ctx
->ac
, "llvm.maxnum",
1177 ac_to_float_type(&ctx
->ac
, def_type
), result
, src
[2]);
1180 result
= ac_build_umax(&ctx
->ac
, src
[0], src
[1]);
1181 result
= ac_build_umax(&ctx
->ac
, result
, src
[2]);
1184 result
= ac_build_imax(&ctx
->ac
, src
[0], src
[1]);
1185 result
= ac_build_imax(&ctx
->ac
, result
, src
[2]);
1187 case nir_op_fmed3
: {
1188 src
[0] = ac_to_float(&ctx
->ac
, src
[0]);
1189 src
[1] = ac_to_float(&ctx
->ac
, src
[1]);
1190 src
[2] = ac_to_float(&ctx
->ac
, src
[2]);
1191 result
= ac_build_fmed3(&ctx
->ac
, src
[0], src
[1], src
[2],
1192 instr
->dest
.dest
.ssa
.bit_size
);
1195 case nir_op_imed3
: {
1196 LLVMValueRef tmp1
= ac_build_imin(&ctx
->ac
, src
[0], src
[1]);
1197 LLVMValueRef tmp2
= ac_build_imax(&ctx
->ac
, src
[0], src
[1]);
1198 tmp2
= ac_build_imin(&ctx
->ac
, tmp2
, src
[2]);
1199 result
= ac_build_imax(&ctx
->ac
, tmp1
, tmp2
);
1202 case nir_op_umed3
: {
1203 LLVMValueRef tmp1
= ac_build_umin(&ctx
->ac
, src
[0], src
[1]);
1204 LLVMValueRef tmp2
= ac_build_umax(&ctx
->ac
, src
[0], src
[1]);
1205 tmp2
= ac_build_umin(&ctx
->ac
, tmp2
, src
[2]);
1206 result
= ac_build_umax(&ctx
->ac
, tmp1
, tmp2
);
1211 fprintf(stderr
, "Unknown NIR alu instr: ");
1212 nir_print_instr(&instr
->instr
, stderr
);
1213 fprintf(stderr
, "\n");
1218 assert(instr
->dest
.dest
.is_ssa
);
1219 result
= ac_to_integer_or_pointer(&ctx
->ac
, result
);
1220 ctx
->ssa_defs
[instr
->dest
.dest
.ssa
.index
] = result
;
1224 ac_restore_inexact_math(ctx
->ac
.builder
, saved_inexact
);
1227 static void visit_load_const(struct ac_nir_context
*ctx
,
1228 const nir_load_const_instr
*instr
)
1230 LLVMValueRef values
[4], value
= NULL
;
1231 LLVMTypeRef element_type
=
1232 LLVMIntTypeInContext(ctx
->ac
.context
, instr
->def
.bit_size
);
1234 for (unsigned i
= 0; i
< instr
->def
.num_components
; ++i
) {
1235 switch (instr
->def
.bit_size
) {
1237 values
[i
] = LLVMConstInt(element_type
,
1238 instr
->value
[i
].u8
, false);
1241 values
[i
] = LLVMConstInt(element_type
,
1242 instr
->value
[i
].u16
, false);
1245 values
[i
] = LLVMConstInt(element_type
,
1246 instr
->value
[i
].u32
, false);
1249 values
[i
] = LLVMConstInt(element_type
,
1250 instr
->value
[i
].u64
, false);
1254 "unsupported nir load_const bit_size: %d\n",
1255 instr
->def
.bit_size
);
1259 if (instr
->def
.num_components
> 1) {
1260 value
= LLVMConstVector(values
, instr
->def
.num_components
);
1264 ctx
->ssa_defs
[instr
->def
.index
] = value
;
1268 get_buffer_size(struct ac_nir_context
*ctx
, LLVMValueRef descriptor
, bool in_elements
)
1271 LLVMBuildExtractElement(ctx
->ac
.builder
, descriptor
,
1272 LLVMConstInt(ctx
->ac
.i32
, 2, false), "");
1275 if (ctx
->ac
.chip_class
== GFX8
&& in_elements
) {
1276 /* On GFX8, the descriptor contains the size in bytes,
1277 * but TXQ must return the size in elements.
1278 * The stride is always non-zero for resources using TXQ.
1280 LLVMValueRef stride
=
1281 LLVMBuildExtractElement(ctx
->ac
.builder
, descriptor
,
1283 stride
= LLVMBuildLShr(ctx
->ac
.builder
, stride
,
1284 LLVMConstInt(ctx
->ac
.i32
, 16, false), "");
1285 stride
= LLVMBuildAnd(ctx
->ac
.builder
, stride
,
1286 LLVMConstInt(ctx
->ac
.i32
, 0x3fff, false), "");
1288 size
= LLVMBuildUDiv(ctx
->ac
.builder
, size
, stride
, "");
1293 /* Gather4 should follow the same rules as bilinear filtering, but the hardware
1294 * incorrectly forces nearest filtering if the texture format is integer.
1295 * The only effect it has on Gather4, which always returns 4 texels for
1296 * bilinear filtering, is that the final coordinates are off by 0.5 of
1299 * The workaround is to subtract 0.5 from the unnormalized coordinates,
1300 * or (0.5 / size) from the normalized coordinates.
1302 * However, cube textures with 8_8_8_8 data formats require a different
1303 * workaround of overriding the num format to USCALED/SSCALED. This would lose
1304 * precision in 32-bit data formats, so it needs to be applied dynamically at
1305 * runtime. In this case, return an i1 value that indicates whether the
1306 * descriptor was overridden (and hence a fixup of the sampler result is needed).
1308 static LLVMValueRef
lower_gather4_integer(struct ac_llvm_context
*ctx
,
1310 struct ac_image_args
*args
,
1311 const nir_tex_instr
*instr
)
1313 const struct glsl_type
*type
= glsl_without_array(var
->type
);
1314 enum glsl_base_type stype
= glsl_get_sampler_result_type(type
);
1315 LLVMValueRef wa_8888
= NULL
;
1316 LLVMValueRef half_texel
[2];
1317 LLVMValueRef result
;
1319 assert(stype
== GLSL_TYPE_INT
|| stype
== GLSL_TYPE_UINT
);
1321 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_CUBE
) {
1322 LLVMValueRef formats
;
1323 LLVMValueRef data_format
;
1324 LLVMValueRef wa_formats
;
1326 formats
= LLVMBuildExtractElement(ctx
->builder
, args
->resource
, ctx
->i32_1
, "");
1328 data_format
= LLVMBuildLShr(ctx
->builder
, formats
,
1329 LLVMConstInt(ctx
->i32
, 20, false), "");
1330 data_format
= LLVMBuildAnd(ctx
->builder
, data_format
,
1331 LLVMConstInt(ctx
->i32
, (1u << 6) - 1, false), "");
1332 wa_8888
= LLVMBuildICmp(
1333 ctx
->builder
, LLVMIntEQ
, data_format
,
1334 LLVMConstInt(ctx
->i32
, V_008F14_IMG_DATA_FORMAT_8_8_8_8
, false),
1337 uint32_t wa_num_format
=
1338 stype
== GLSL_TYPE_UINT
?
1339 S_008F14_NUM_FORMAT(V_008F14_IMG_NUM_FORMAT_USCALED
) :
1340 S_008F14_NUM_FORMAT(V_008F14_IMG_NUM_FORMAT_SSCALED
);
1341 wa_formats
= LLVMBuildAnd(ctx
->builder
, formats
,
1342 LLVMConstInt(ctx
->i32
, C_008F14_NUM_FORMAT
, false),
1344 wa_formats
= LLVMBuildOr(ctx
->builder
, wa_formats
,
1345 LLVMConstInt(ctx
->i32
, wa_num_format
, false), "");
1347 formats
= LLVMBuildSelect(ctx
->builder
, wa_8888
, wa_formats
, formats
, "");
1348 args
->resource
= LLVMBuildInsertElement(
1349 ctx
->builder
, args
->resource
, formats
, ctx
->i32_1
, "");
1352 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_RECT
) {
1354 half_texel
[0] = half_texel
[1] = LLVMConstReal(ctx
->f32
, -0.5);
1356 struct ac_image_args resinfo
= {};
1357 LLVMBasicBlockRef bbs
[2];
1359 LLVMValueRef unnorm
= NULL
;
1360 LLVMValueRef default_offset
= ctx
->f32_0
;
1361 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_2D
&&
1363 /* In vulkan, whether the sampler uses unnormalized
1364 * coordinates or not is a dynamic property of the
1365 * sampler. Hence, to figure out whether or not we
1366 * need to divide by the texture size, we need to test
1367 * the sampler at runtime. This tests the bit set by
1368 * radv_init_sampler().
1370 LLVMValueRef sampler0
=
1371 LLVMBuildExtractElement(ctx
->builder
, args
->sampler
, ctx
->i32_0
, "");
1372 sampler0
= LLVMBuildLShr(ctx
->builder
, sampler0
,
1373 LLVMConstInt(ctx
->i32
, 15, false), "");
1374 sampler0
= LLVMBuildAnd(ctx
->builder
, sampler0
, ctx
->i32_1
, "");
1375 unnorm
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, sampler0
, ctx
->i32_1
, "");
1376 default_offset
= LLVMConstReal(ctx
->f32
, -0.5);
1379 bbs
[0] = LLVMGetInsertBlock(ctx
->builder
);
1380 if (wa_8888
|| unnorm
) {
1381 assert(!(wa_8888
&& unnorm
));
1382 LLVMValueRef not_needed
= wa_8888
? wa_8888
: unnorm
;
1383 /* Skip the texture size query entirely if we don't need it. */
1384 ac_build_ifcc(ctx
, LLVMBuildNot(ctx
->builder
, not_needed
, ""), 2000);
1385 bbs
[1] = LLVMGetInsertBlock(ctx
->builder
);
1388 /* Query the texture size. */
1389 resinfo
.dim
= ac_get_sampler_dim(ctx
->chip_class
, instr
->sampler_dim
, instr
->is_array
);
1390 resinfo
.opcode
= ac_image_get_resinfo
;
1391 resinfo
.dmask
= 0xf;
1392 resinfo
.lod
= ctx
->i32_0
;
1393 resinfo
.resource
= args
->resource
;
1394 resinfo
.attributes
= AC_FUNC_ATTR_READNONE
;
1395 LLVMValueRef size
= ac_build_image_opcode(ctx
, &resinfo
);
1397 /* Compute -0.5 / size. */
1398 for (unsigned c
= 0; c
< 2; c
++) {
1400 LLVMBuildExtractElement(ctx
->builder
, size
,
1401 LLVMConstInt(ctx
->i32
, c
, 0), "");
1402 half_texel
[c
] = LLVMBuildUIToFP(ctx
->builder
, half_texel
[c
], ctx
->f32
, "");
1403 half_texel
[c
] = ac_build_fdiv(ctx
, ctx
->f32_1
, half_texel
[c
]);
1404 half_texel
[c
] = LLVMBuildFMul(ctx
->builder
, half_texel
[c
],
1405 LLVMConstReal(ctx
->f32
, -0.5), "");
1408 if (wa_8888
|| unnorm
) {
1409 ac_build_endif(ctx
, 2000);
1411 for (unsigned c
= 0; c
< 2; c
++) {
1412 LLVMValueRef values
[2] = { default_offset
, half_texel
[c
] };
1413 half_texel
[c
] = ac_build_phi(ctx
, ctx
->f32
, 2,
1419 for (unsigned c
= 0; c
< 2; c
++) {
1421 tmp
= LLVMBuildBitCast(ctx
->builder
, args
->coords
[c
], ctx
->f32
, "");
1422 args
->coords
[c
] = LLVMBuildFAdd(ctx
->builder
, tmp
, half_texel
[c
], "");
1425 args
->attributes
= AC_FUNC_ATTR_READNONE
;
1426 result
= ac_build_image_opcode(ctx
, args
);
1428 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_CUBE
) {
1429 LLVMValueRef tmp
, tmp2
;
1431 /* if the cube workaround is in place, f2i the result. */
1432 for (unsigned c
= 0; c
< 4; c
++) {
1433 tmp
= LLVMBuildExtractElement(ctx
->builder
, result
, LLVMConstInt(ctx
->i32
, c
, false), "");
1434 if (stype
== GLSL_TYPE_UINT
)
1435 tmp2
= LLVMBuildFPToUI(ctx
->builder
, tmp
, ctx
->i32
, "");
1437 tmp2
= LLVMBuildFPToSI(ctx
->builder
, tmp
, ctx
->i32
, "");
1438 tmp
= LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->i32
, "");
1439 tmp2
= LLVMBuildBitCast(ctx
->builder
, tmp2
, ctx
->i32
, "");
1440 tmp
= LLVMBuildSelect(ctx
->builder
, wa_8888
, tmp2
, tmp
, "");
1441 tmp
= LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->f32
, "");
1442 result
= LLVMBuildInsertElement(ctx
->builder
, result
, tmp
, LLVMConstInt(ctx
->i32
, c
, false), "");
1448 static nir_deref_instr
*get_tex_texture_deref(const nir_tex_instr
*instr
)
1450 nir_deref_instr
*texture_deref_instr
= NULL
;
1452 for (unsigned i
= 0; i
< instr
->num_srcs
; i
++) {
1453 switch (instr
->src
[i
].src_type
) {
1454 case nir_tex_src_texture_deref
:
1455 texture_deref_instr
= nir_src_as_deref(instr
->src
[i
].src
);
1461 return texture_deref_instr
;
1464 static LLVMValueRef
build_tex_intrinsic(struct ac_nir_context
*ctx
,
1465 const nir_tex_instr
*instr
,
1466 struct ac_image_args
*args
)
1468 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_BUF
) {
1469 unsigned mask
= nir_ssa_def_components_read(&instr
->dest
.ssa
);
1471 assert(instr
->dest
.is_ssa
);
1472 return ac_build_buffer_load_format(&ctx
->ac
,
1476 util_last_bit(mask
),
1478 instr
->dest
.ssa
.bit_size
== 16);
1481 args
->opcode
= ac_image_sample
;
1483 switch (instr
->op
) {
1485 case nir_texop_txf_ms
:
1486 case nir_texop_samples_identical
:
1487 args
->opcode
= args
->level_zero
||
1488 instr
->sampler_dim
== GLSL_SAMPLER_DIM_MS
?
1489 ac_image_load
: ac_image_load_mip
;
1490 args
->level_zero
= false;
1493 case nir_texop_query_levels
:
1494 args
->opcode
= ac_image_get_resinfo
;
1496 args
->lod
= ctx
->ac
.i32_0
;
1497 args
->level_zero
= false;
1500 if (ctx
->stage
!= MESA_SHADER_FRAGMENT
) {
1502 args
->level_zero
= true;
1506 args
->opcode
= ac_image_gather4
;
1507 if (!args
->lod
&& !args
->bias
)
1508 args
->level_zero
= true;
1511 args
->opcode
= ac_image_get_lod
;
1513 case nir_texop_fragment_fetch
:
1514 case nir_texop_fragment_mask_fetch
:
1515 args
->opcode
= ac_image_load
;
1516 args
->level_zero
= false;
1522 if (instr
->op
== nir_texop_tg4
&& ctx
->ac
.chip_class
<= GFX8
) {
1523 nir_deref_instr
*texture_deref_instr
= get_tex_texture_deref(instr
);
1524 nir_variable
*var
= nir_deref_instr_get_variable(texture_deref_instr
);
1525 const struct glsl_type
*type
= glsl_without_array(var
->type
);
1526 enum glsl_base_type stype
= glsl_get_sampler_result_type(type
);
1527 if (stype
== GLSL_TYPE_UINT
|| stype
== GLSL_TYPE_INT
) {
1528 return lower_gather4_integer(&ctx
->ac
, var
, args
, instr
);
1532 /* Fixup for GFX9 which allocates 1D textures as 2D. */
1533 if (instr
->op
== nir_texop_lod
&& ctx
->ac
.chip_class
== GFX9
) {
1534 if ((args
->dim
== ac_image_2darray
||
1535 args
->dim
== ac_image_2d
) && !args
->coords
[1]) {
1536 args
->coords
[1] = ctx
->ac
.i32_0
;
1540 args
->attributes
= AC_FUNC_ATTR_READNONE
;
1541 bool cs_derivs
= ctx
->stage
== MESA_SHADER_COMPUTE
&&
1542 ctx
->info
->cs
.derivative_group
!= DERIVATIVE_GROUP_NONE
;
1543 if (ctx
->stage
== MESA_SHADER_FRAGMENT
|| cs_derivs
) {
1544 /* Prevent texture instructions with implicit derivatives from being
1545 * sinked into branches. */
1546 switch (instr
->op
) {
1550 args
->attributes
|= AC_FUNC_ATTR_CONVERGENT
;
1557 return ac_build_image_opcode(&ctx
->ac
, args
);
1560 static LLVMValueRef
visit_vulkan_resource_reindex(struct ac_nir_context
*ctx
,
1561 nir_intrinsic_instr
*instr
)
1563 LLVMValueRef ptr
= get_src(ctx
, instr
->src
[0]);
1564 LLVMValueRef index
= get_src(ctx
, instr
->src
[1]);
1566 LLVMValueRef result
= LLVMBuildGEP(ctx
->ac
.builder
, ptr
, &index
, 1, "");
1567 LLVMSetMetadata(result
, ctx
->ac
.uniform_md_kind
, ctx
->ac
.empty_md
);
1571 static LLVMValueRef
visit_load_push_constant(struct ac_nir_context
*ctx
,
1572 nir_intrinsic_instr
*instr
)
1574 LLVMValueRef ptr
, addr
;
1575 LLVMValueRef src0
= get_src(ctx
, instr
->src
[0]);
1576 unsigned index
= nir_intrinsic_base(instr
);
1578 addr
= LLVMConstInt(ctx
->ac
.i32
, index
, 0);
1579 addr
= LLVMBuildAdd(ctx
->ac
.builder
, addr
, src0
, "");
1581 /* Load constant values from user SGPRS when possible, otherwise
1582 * fallback to the default path that loads directly from memory.
1584 if (LLVMIsConstant(src0
) &&
1585 instr
->dest
.ssa
.bit_size
== 32) {
1586 unsigned count
= instr
->dest
.ssa
.num_components
;
1587 unsigned offset
= index
;
1589 offset
+= LLVMConstIntGetZExtValue(src0
);
1592 offset
-= ctx
->args
->base_inline_push_consts
;
1594 unsigned num_inline_push_consts
= ctx
->args
->num_inline_push_consts
;
1595 if (offset
+ count
<= num_inline_push_consts
) {
1596 LLVMValueRef push_constants
[num_inline_push_consts
];
1597 for (unsigned i
= 0; i
< num_inline_push_consts
; i
++)
1598 push_constants
[i
] = ac_get_arg(&ctx
->ac
,
1599 ctx
->args
->inline_push_consts
[i
]);
1600 return ac_build_gather_values(&ctx
->ac
,
1601 push_constants
+ offset
,
1606 ptr
= LLVMBuildGEP(ctx
->ac
.builder
,
1607 ac_get_arg(&ctx
->ac
, ctx
->args
->push_constants
), &addr
, 1, "");
1609 if (instr
->dest
.ssa
.bit_size
== 8) {
1610 unsigned load_dwords
= instr
->dest
.ssa
.num_components
> 1 ? 2 : 1;
1611 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->ac
.i8
, 4 * load_dwords
);
1612 ptr
= ac_cast_ptr(&ctx
->ac
, ptr
, vec_type
);
1613 LLVMValueRef res
= LLVMBuildLoad(ctx
->ac
.builder
, ptr
, "");
1615 LLVMValueRef params
[3];
1616 if (load_dwords
> 1) {
1617 LLVMValueRef res_vec
= LLVMBuildBitCast(ctx
->ac
.builder
, res
, ctx
->ac
.v2i32
, "");
1618 params
[0] = LLVMBuildExtractElement(ctx
->ac
.builder
, res_vec
, LLVMConstInt(ctx
->ac
.i32
, 1, false), "");
1619 params
[1] = LLVMBuildExtractElement(ctx
->ac
.builder
, res_vec
, LLVMConstInt(ctx
->ac
.i32
, 0, false), "");
1621 res
= LLVMBuildBitCast(ctx
->ac
.builder
, res
, ctx
->ac
.i32
, "");
1622 params
[0] = ctx
->ac
.i32_0
;
1626 res
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.alignbyte", ctx
->ac
.i32
, params
, 3, 0);
1628 res
= LLVMBuildTrunc(ctx
->ac
.builder
, res
, LLVMIntTypeInContext(ctx
->ac
.context
, instr
->dest
.ssa
.num_components
* 8), "");
1629 if (instr
->dest
.ssa
.num_components
> 1)
1630 res
= LLVMBuildBitCast(ctx
->ac
.builder
, res
, LLVMVectorType(ctx
->ac
.i8
, instr
->dest
.ssa
.num_components
), "");
1632 } else if (instr
->dest
.ssa
.bit_size
== 16) {
1633 unsigned load_dwords
= instr
->dest
.ssa
.num_components
/ 2 + 1;
1634 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->ac
.i16
, 2 * load_dwords
);
1635 ptr
= ac_cast_ptr(&ctx
->ac
, ptr
, vec_type
);
1636 LLVMValueRef res
= LLVMBuildLoad(ctx
->ac
.builder
, ptr
, "");
1637 res
= LLVMBuildBitCast(ctx
->ac
.builder
, res
, vec_type
, "");
1638 LLVMValueRef cond
= LLVMBuildLShr(ctx
->ac
.builder
, addr
, ctx
->ac
.i32_1
, "");
1639 cond
= LLVMBuildTrunc(ctx
->ac
.builder
, cond
, ctx
->ac
.i1
, "");
1640 LLVMValueRef mask
[] = { LLVMConstInt(ctx
->ac
.i32
, 0, false), LLVMConstInt(ctx
->ac
.i32
, 1, false),
1641 LLVMConstInt(ctx
->ac
.i32
, 2, false), LLVMConstInt(ctx
->ac
.i32
, 3, false),
1642 LLVMConstInt(ctx
->ac
.i32
, 4, false)};
1643 LLVMValueRef swizzle_aligned
= LLVMConstVector(&mask
[0], instr
->dest
.ssa
.num_components
);
1644 LLVMValueRef swizzle_unaligned
= LLVMConstVector(&mask
[1], instr
->dest
.ssa
.num_components
);
1645 LLVMValueRef shuffle_aligned
= LLVMBuildShuffleVector(ctx
->ac
.builder
, res
, res
, swizzle_aligned
, "");
1646 LLVMValueRef shuffle_unaligned
= LLVMBuildShuffleVector(ctx
->ac
.builder
, res
, res
, swizzle_unaligned
, "");
1647 res
= LLVMBuildSelect(ctx
->ac
.builder
, cond
, shuffle_unaligned
, shuffle_aligned
, "");
1648 return LLVMBuildBitCast(ctx
->ac
.builder
, res
, get_def_type(ctx
, &instr
->dest
.ssa
), "");
1651 ptr
= ac_cast_ptr(&ctx
->ac
, ptr
, get_def_type(ctx
, &instr
->dest
.ssa
));
1653 return LLVMBuildLoad(ctx
->ac
.builder
, ptr
, "");
1656 static LLVMValueRef
visit_get_buffer_size(struct ac_nir_context
*ctx
,
1657 const nir_intrinsic_instr
*instr
)
1659 LLVMValueRef index
= get_src(ctx
, instr
->src
[0]);
1661 return get_buffer_size(ctx
, ctx
->abi
->load_ssbo(ctx
->abi
, index
, false), false);
1664 static uint32_t widen_mask(uint32_t mask
, unsigned multiplier
)
1666 uint32_t new_mask
= 0;
1667 for(unsigned i
= 0; i
< 32 && (1u << i
) <= mask
; ++i
)
1668 if (mask
& (1u << i
))
1669 new_mask
|= ((1u << multiplier
) - 1u) << (i
* multiplier
);
1673 static LLVMValueRef
extract_vector_range(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
1674 unsigned start
, unsigned count
)
1676 LLVMValueRef mask
[] = {
1677 ctx
->i32_0
, ctx
->i32_1
,
1678 LLVMConstInt(ctx
->i32
, 2, false), LLVMConstInt(ctx
->i32
, 3, false) };
1680 unsigned src_elements
= ac_get_llvm_num_components(src
);
1682 if (count
== src_elements
) {
1685 } else if (count
== 1) {
1686 assert(start
< src_elements
);
1687 return LLVMBuildExtractElement(ctx
->builder
, src
, mask
[start
], "");
1689 assert(start
+ count
<= src_elements
);
1691 LLVMValueRef swizzle
= LLVMConstVector(&mask
[start
], count
);
1692 return LLVMBuildShuffleVector(ctx
->builder
, src
, src
, swizzle
, "");
1696 static unsigned get_cache_policy(struct ac_nir_context
*ctx
,
1697 enum gl_access_qualifier access
,
1698 bool may_store_unaligned
,
1699 bool writeonly_memory
)
1701 unsigned cache_policy
= 0;
1703 /* GFX6 has a TC L1 bug causing corruption of 8bit/16bit stores. All
1704 * store opcodes not aligned to a dword are affected. The only way to
1705 * get unaligned stores is through shader images.
1707 if (((may_store_unaligned
&& ctx
->ac
.chip_class
== GFX6
) ||
1708 /* If this is write-only, don't keep data in L1 to prevent
1709 * evicting L1 cache lines that may be needed by other
1713 access
& (ACCESS_COHERENT
| ACCESS_VOLATILE
))) {
1714 cache_policy
|= ac_glc
;
1717 if (access
& ACCESS_STREAM_CACHE_POLICY
)
1718 cache_policy
|= ac_slc
| ac_glc
;
1720 return cache_policy
;
1723 static LLVMValueRef
enter_waterfall_ssbo(struct ac_nir_context
*ctx
,
1724 struct waterfall_context
*wctx
,
1725 const nir_intrinsic_instr
*instr
,
1728 return enter_waterfall(ctx
, wctx
, get_src(ctx
, src
),
1729 nir_intrinsic_access(instr
) & ACCESS_NON_UNIFORM
);
1732 static void visit_store_ssbo(struct ac_nir_context
*ctx
,
1733 nir_intrinsic_instr
*instr
)
1735 if (ctx
->ac
.postponed_kill
) {
1736 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
1737 ctx
->ac
.postponed_kill
, "");
1738 ac_build_ifcc(&ctx
->ac
, cond
, 7000);
1741 LLVMValueRef src_data
= get_src(ctx
, instr
->src
[0]);
1742 int elem_size_bytes
= ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src_data
)) / 8;
1743 unsigned writemask
= nir_intrinsic_write_mask(instr
);
1744 enum gl_access_qualifier access
= nir_intrinsic_access(instr
);
1745 bool writeonly_memory
= access
& ACCESS_NON_READABLE
;
1746 unsigned cache_policy
= get_cache_policy(ctx
, access
, false, writeonly_memory
);
1748 struct waterfall_context wctx
;
1749 LLVMValueRef rsrc_base
= enter_waterfall_ssbo(ctx
, &wctx
, instr
, instr
->src
[1]);
1751 LLVMValueRef rsrc
= ctx
->abi
->load_ssbo(ctx
->abi
, rsrc_base
, true);
1752 LLVMValueRef base_data
= src_data
;
1753 base_data
= ac_trim_vector(&ctx
->ac
, base_data
, instr
->num_components
);
1754 LLVMValueRef base_offset
= get_src(ctx
, instr
->src
[2]);
1758 LLVMValueRef data
, offset
;
1759 LLVMTypeRef data_type
;
1761 u_bit_scan_consecutive_range(&writemask
, &start
, &count
);
1763 /* Due to an LLVM limitation with LLVM < 9, split 3-element
1764 * writes into a 2-element and a 1-element write. */
1766 (elem_size_bytes
!= 4 || !ac_has_vec3_support(ctx
->ac
.chip_class
, false))) {
1767 writemask
|= 1 << (start
+ 2);
1770 int num_bytes
= count
* elem_size_bytes
; /* count in bytes */
1772 /* we can only store 4 DWords at the same time.
1773 * can only happen for 64 Bit vectors. */
1774 if (num_bytes
> 16) {
1775 writemask
|= ((1u << (count
- 2)) - 1u) << (start
+ 2);
1780 /* check alignment of 16 Bit stores */
1781 if (elem_size_bytes
== 2 && num_bytes
> 2 && (start
% 2) == 1) {
1782 writemask
|= ((1u << (count
- 1)) - 1u) << (start
+ 1);
1787 /* Due to alignment issues, split stores of 8-bit/16-bit
1790 if (ctx
->ac
.chip_class
== GFX6
&& count
> 1 && elem_size_bytes
< 4) {
1791 writemask
|= ((1u << (count
- 1)) - 1u) << (start
+ 1);
1793 num_bytes
= elem_size_bytes
;
1796 data
= extract_vector_range(&ctx
->ac
, base_data
, start
, count
);
1798 offset
= LLVMBuildAdd(ctx
->ac
.builder
, base_offset
,
1799 LLVMConstInt(ctx
->ac
.i32
, start
* elem_size_bytes
, false), "");
1801 if (num_bytes
== 1) {
1802 ac_build_tbuffer_store_byte(&ctx
->ac
, rsrc
, data
,
1803 offset
, ctx
->ac
.i32_0
,
1805 } else if (num_bytes
== 2) {
1806 ac_build_tbuffer_store_short(&ctx
->ac
, rsrc
, data
,
1807 offset
, ctx
->ac
.i32_0
,
1810 int num_channels
= num_bytes
/ 4;
1812 switch (num_bytes
) {
1813 case 16: /* v4f32 */
1814 data_type
= ctx
->ac
.v4f32
;
1816 case 12: /* v3f32 */
1817 data_type
= ctx
->ac
.v3f32
;
1820 data_type
= ctx
->ac
.v2f32
;
1823 data_type
= ctx
->ac
.f32
;
1826 unreachable("Malformed vector store.");
1828 data
= LLVMBuildBitCast(ctx
->ac
.builder
, data
, data_type
, "");
1830 ac_build_buffer_store_dword(&ctx
->ac
, rsrc
, data
,
1831 num_channels
, offset
,
1837 exit_waterfall(ctx
, &wctx
, NULL
);
1839 if (ctx
->ac
.postponed_kill
)
1840 ac_build_endif(&ctx
->ac
, 7000);
1843 static LLVMValueRef
emit_ssbo_comp_swap_64(struct ac_nir_context
*ctx
,
1844 LLVMValueRef descriptor
,
1845 LLVMValueRef offset
,
1846 LLVMValueRef compare
,
1847 LLVMValueRef exchange
)
1849 LLVMBasicBlockRef start_block
= NULL
, then_block
= NULL
;
1850 if (ctx
->abi
->robust_buffer_access
) {
1851 LLVMValueRef size
= ac_llvm_extract_elem(&ctx
->ac
, descriptor
, 2);
1853 LLVMValueRef cond
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntULT
, offset
, size
, "");
1854 start_block
= LLVMGetInsertBlock(ctx
->ac
.builder
);
1856 ac_build_ifcc(&ctx
->ac
, cond
, -1);
1858 then_block
= LLVMGetInsertBlock(ctx
->ac
.builder
);
1861 LLVMValueRef ptr_parts
[2] = {
1862 ac_llvm_extract_elem(&ctx
->ac
, descriptor
, 0),
1863 LLVMBuildAnd(ctx
->ac
.builder
,
1864 ac_llvm_extract_elem(&ctx
->ac
, descriptor
, 1),
1865 LLVMConstInt(ctx
->ac
.i32
, 65535, 0), "")
1868 ptr_parts
[1] = LLVMBuildTrunc(ctx
->ac
.builder
, ptr_parts
[1], ctx
->ac
.i16
, "");
1869 ptr_parts
[1] = LLVMBuildSExt(ctx
->ac
.builder
, ptr_parts
[1], ctx
->ac
.i32
, "");
1871 offset
= LLVMBuildZExt(ctx
->ac
.builder
, offset
, ctx
->ac
.i64
, "");
1873 LLVMValueRef ptr
= ac_build_gather_values(&ctx
->ac
, ptr_parts
, 2);
1874 ptr
= LLVMBuildBitCast(ctx
->ac
.builder
, ptr
, ctx
->ac
.i64
, "");
1875 ptr
= LLVMBuildAdd(ctx
->ac
.builder
, ptr
, offset
, "");
1876 ptr
= LLVMBuildIntToPtr(ctx
->ac
.builder
, ptr
, LLVMPointerType(ctx
->ac
.i64
, AC_ADDR_SPACE_GLOBAL
), "");
1878 LLVMValueRef result
= ac_build_atomic_cmp_xchg(&ctx
->ac
, ptr
, compare
, exchange
, "singlethread-one-as");
1879 result
= LLVMBuildExtractValue(ctx
->ac
.builder
, result
, 0, "");
1881 if (ctx
->abi
->robust_buffer_access
) {
1882 ac_build_endif(&ctx
->ac
, -1);
1884 LLVMBasicBlockRef incoming_blocks
[2] = {
1889 LLVMValueRef incoming_values
[2] = {
1890 LLVMConstInt(ctx
->ac
.i64
, 0, 0),
1893 LLVMValueRef ret
= LLVMBuildPhi(ctx
->ac
.builder
, ctx
->ac
.i64
, "");
1894 LLVMAddIncoming(ret
, incoming_values
, incoming_blocks
, 2);
1901 static LLVMValueRef
visit_atomic_ssbo(struct ac_nir_context
*ctx
,
1902 nir_intrinsic_instr
*instr
)
1904 if (ctx
->ac
.postponed_kill
) {
1905 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
1906 ctx
->ac
.postponed_kill
, "");
1907 ac_build_ifcc(&ctx
->ac
, cond
, 7001);
1910 LLVMTypeRef return_type
= LLVMTypeOf(get_src(ctx
, instr
->src
[2]));
1912 char name
[64], type
[8];
1913 LLVMValueRef params
[6], descriptor
;
1914 LLVMValueRef result
;
1917 struct waterfall_context wctx
;
1918 LLVMValueRef rsrc_base
= enter_waterfall_ssbo(ctx
, &wctx
, instr
, instr
->src
[0]);
1920 switch (instr
->intrinsic
) {
1921 case nir_intrinsic_ssbo_atomic_add
:
1924 case nir_intrinsic_ssbo_atomic_imin
:
1927 case nir_intrinsic_ssbo_atomic_umin
:
1930 case nir_intrinsic_ssbo_atomic_imax
:
1933 case nir_intrinsic_ssbo_atomic_umax
:
1936 case nir_intrinsic_ssbo_atomic_and
:
1939 case nir_intrinsic_ssbo_atomic_or
:
1942 case nir_intrinsic_ssbo_atomic_xor
:
1945 case nir_intrinsic_ssbo_atomic_exchange
:
1948 case nir_intrinsic_ssbo_atomic_comp_swap
:
1955 descriptor
= ctx
->abi
->load_ssbo(ctx
->abi
,
1959 if (instr
->intrinsic
== nir_intrinsic_ssbo_atomic_comp_swap
&&
1960 return_type
== ctx
->ac
.i64
) {
1961 result
= emit_ssbo_comp_swap_64(ctx
, descriptor
,
1962 get_src(ctx
, instr
->src
[1]),
1963 get_src(ctx
, instr
->src
[2]),
1964 get_src(ctx
, instr
->src
[3]));
1966 if (instr
->intrinsic
== nir_intrinsic_ssbo_atomic_comp_swap
) {
1967 params
[arg_count
++] = ac_llvm_extract_elem(&ctx
->ac
, get_src(ctx
, instr
->src
[3]), 0);
1969 params
[arg_count
++] = ac_llvm_extract_elem(&ctx
->ac
, get_src(ctx
, instr
->src
[2]), 0);
1970 params
[arg_count
++] = descriptor
;
1972 if (LLVM_VERSION_MAJOR
>= 9) {
1973 /* XXX: The new raw/struct atomic intrinsics are buggy with
1974 * LLVM 8, see r358579.
1976 params
[arg_count
++] = get_src(ctx
, instr
->src
[1]); /* voffset */
1977 params
[arg_count
++] = ctx
->ac
.i32_0
; /* soffset */
1978 params
[arg_count
++] = ctx
->ac
.i32_0
; /* slc */
1980 ac_build_type_name_for_intr(return_type
, type
, sizeof(type
));
1981 snprintf(name
, sizeof(name
),
1982 "llvm.amdgcn.raw.buffer.atomic.%s.%s", op
, type
);
1984 params
[arg_count
++] = ctx
->ac
.i32_0
; /* vindex */
1985 params
[arg_count
++] = get_src(ctx
, instr
->src
[1]); /* voffset */
1986 params
[arg_count
++] = ctx
->ac
.i1false
; /* slc */
1988 assert(return_type
== ctx
->ac
.i32
);
1989 snprintf(name
, sizeof(name
),
1990 "llvm.amdgcn.buffer.atomic.%s", op
);
1993 result
= ac_build_intrinsic(&ctx
->ac
, name
, return_type
, params
,
1997 result
= exit_waterfall(ctx
, &wctx
, result
);
1998 if (ctx
->ac
.postponed_kill
)
1999 ac_build_endif(&ctx
->ac
, 7001);
2003 static LLVMValueRef
visit_load_buffer(struct ac_nir_context
*ctx
,
2004 nir_intrinsic_instr
*instr
)
2006 struct waterfall_context wctx
;
2007 LLVMValueRef rsrc_base
= enter_waterfall_ssbo(ctx
, &wctx
, instr
, instr
->src
[0]);
2009 int elem_size_bytes
= instr
->dest
.ssa
.bit_size
/ 8;
2010 int num_components
= instr
->num_components
;
2011 enum gl_access_qualifier access
= nir_intrinsic_access(instr
);
2012 unsigned cache_policy
= get_cache_policy(ctx
, access
, false, false);
2014 LLVMValueRef offset
= get_src(ctx
, instr
->src
[1]);
2015 LLVMValueRef rsrc
= ctx
->abi
->load_ssbo(ctx
->abi
, rsrc_base
, false);
2016 LLVMValueRef vindex
= ctx
->ac
.i32_0
;
2018 LLVMTypeRef def_type
= get_def_type(ctx
, &instr
->dest
.ssa
);
2019 LLVMTypeRef def_elem_type
= num_components
> 1 ? LLVMGetElementType(def_type
) : def_type
;
2021 LLVMValueRef results
[4];
2022 for (int i
= 0; i
< num_components
;) {
2023 int num_elems
= num_components
- i
;
2024 if (elem_size_bytes
< 4 && nir_intrinsic_align(instr
) % 4 != 0)
2026 if (num_elems
* elem_size_bytes
> 16)
2027 num_elems
= 16 / elem_size_bytes
;
2028 int load_bytes
= num_elems
* elem_size_bytes
;
2030 LLVMValueRef immoffset
= LLVMConstInt(ctx
->ac
.i32
, i
* elem_size_bytes
, false);
2034 if (load_bytes
== 1) {
2035 ret
= ac_build_tbuffer_load_byte(&ctx
->ac
,
2041 } else if (load_bytes
== 2) {
2042 ret
= ac_build_tbuffer_load_short(&ctx
->ac
,
2049 int num_channels
= util_next_power_of_two(load_bytes
) / 4;
2050 bool can_speculate
= access
& ACCESS_CAN_REORDER
;
2052 ret
= ac_build_buffer_load(&ctx
->ac
, rsrc
, num_channels
,
2053 vindex
, offset
, immoffset
, 0,
2054 cache_policy
, can_speculate
, false);
2057 LLVMTypeRef byte_vec
= LLVMVectorType(ctx
->ac
.i8
, ac_get_type_size(LLVMTypeOf(ret
)));
2058 ret
= LLVMBuildBitCast(ctx
->ac
.builder
, ret
, byte_vec
, "");
2059 ret
= ac_trim_vector(&ctx
->ac
, ret
, load_bytes
);
2061 LLVMTypeRef ret_type
= LLVMVectorType(def_elem_type
, num_elems
);
2062 ret
= LLVMBuildBitCast(ctx
->ac
.builder
, ret
, ret_type
, "");
2064 for (unsigned j
= 0; j
< num_elems
; j
++) {
2065 results
[i
+ j
] = LLVMBuildExtractElement(ctx
->ac
.builder
, ret
, LLVMConstInt(ctx
->ac
.i32
, j
, false), "");
2070 LLVMValueRef ret
= ac_build_gather_values(&ctx
->ac
, results
, num_components
);
2071 return exit_waterfall(ctx
, &wctx
, ret
);
2074 static LLVMValueRef
enter_waterfall_ubo(struct ac_nir_context
*ctx
,
2075 struct waterfall_context
*wctx
,
2076 const nir_intrinsic_instr
*instr
)
2078 return enter_waterfall(ctx
, wctx
, get_src(ctx
, instr
->src
[0]),
2079 nir_intrinsic_access(instr
) & ACCESS_NON_UNIFORM
);
2082 static LLVMValueRef
visit_load_ubo_buffer(struct ac_nir_context
*ctx
,
2083 nir_intrinsic_instr
*instr
)
2085 struct waterfall_context wctx
;
2086 LLVMValueRef rsrc_base
= enter_waterfall_ubo(ctx
, &wctx
, instr
);
2089 LLVMValueRef rsrc
= rsrc_base
;
2090 LLVMValueRef offset
= get_src(ctx
, instr
->src
[1]);
2091 int num_components
= instr
->num_components
;
2093 if (ctx
->abi
->load_ubo
)
2094 rsrc
= ctx
->abi
->load_ubo(ctx
->abi
, rsrc
);
2096 if (instr
->dest
.ssa
.bit_size
== 64)
2097 num_components
*= 2;
2099 if (instr
->dest
.ssa
.bit_size
== 16 || instr
->dest
.ssa
.bit_size
== 8) {
2100 unsigned load_bytes
= instr
->dest
.ssa
.bit_size
/ 8;
2101 LLVMValueRef results
[num_components
];
2102 for (unsigned i
= 0; i
< num_components
; ++i
) {
2103 LLVMValueRef immoffset
= LLVMConstInt(ctx
->ac
.i32
,
2106 if (load_bytes
== 1) {
2107 results
[i
] = ac_build_tbuffer_load_byte(&ctx
->ac
,
2114 assert(load_bytes
== 2);
2115 results
[i
] = ac_build_tbuffer_load_short(&ctx
->ac
,
2123 ret
= ac_build_gather_values(&ctx
->ac
, results
, num_components
);
2125 ret
= ac_build_buffer_load(&ctx
->ac
, rsrc
, num_components
, NULL
, offset
,
2126 NULL
, 0, 0, true, true);
2128 ret
= ac_trim_vector(&ctx
->ac
, ret
, num_components
);
2131 ret
= LLVMBuildBitCast(ctx
->ac
.builder
, ret
,
2132 get_def_type(ctx
, &instr
->dest
.ssa
), "");
2134 return exit_waterfall(ctx
, &wctx
, ret
);
2138 get_deref_offset(struct ac_nir_context
*ctx
, nir_deref_instr
*instr
,
2139 bool vs_in
, unsigned *vertex_index_out
,
2140 LLVMValueRef
*vertex_index_ref
,
2141 unsigned *const_out
, LLVMValueRef
*indir_out
)
2143 nir_variable
*var
= nir_deref_instr_get_variable(instr
);
2144 nir_deref_path path
;
2145 unsigned idx_lvl
= 1;
2147 nir_deref_path_init(&path
, instr
, NULL
);
2149 if (vertex_index_out
!= NULL
|| vertex_index_ref
!= NULL
) {
2150 if (vertex_index_ref
) {
2151 *vertex_index_ref
= get_src(ctx
, path
.path
[idx_lvl
]->arr
.index
);
2152 if (vertex_index_out
)
2153 *vertex_index_out
= 0;
2155 *vertex_index_out
= nir_src_as_uint(path
.path
[idx_lvl
]->arr
.index
);
2160 uint32_t const_offset
= 0;
2161 LLVMValueRef offset
= NULL
;
2163 if (var
->data
.compact
) {
2164 assert(instr
->deref_type
== nir_deref_type_array
);
2165 const_offset
= nir_src_as_uint(instr
->arr
.index
);
2169 for (; path
.path
[idx_lvl
]; ++idx_lvl
) {
2170 const struct glsl_type
*parent_type
= path
.path
[idx_lvl
- 1]->type
;
2171 if (path
.path
[idx_lvl
]->deref_type
== nir_deref_type_struct
) {
2172 unsigned index
= path
.path
[idx_lvl
]->strct
.index
;
2174 for (unsigned i
= 0; i
< index
; i
++) {
2175 const struct glsl_type
*ft
= glsl_get_struct_field(parent_type
, i
);
2176 const_offset
+= glsl_count_attribute_slots(ft
, vs_in
);
2178 } else if(path
.path
[idx_lvl
]->deref_type
== nir_deref_type_array
) {
2179 unsigned size
= glsl_count_attribute_slots(path
.path
[idx_lvl
]->type
, vs_in
);
2180 if (nir_src_is_const(path
.path
[idx_lvl
]->arr
.index
)) {
2181 const_offset
+= size
*
2182 nir_src_as_uint(path
.path
[idx_lvl
]->arr
.index
);
2184 LLVMValueRef array_off
= LLVMBuildMul(ctx
->ac
.builder
, LLVMConstInt(ctx
->ac
.i32
, size
, 0),
2185 get_src(ctx
, path
.path
[idx_lvl
]->arr
.index
), "");
2187 offset
= LLVMBuildAdd(ctx
->ac
.builder
, offset
, array_off
, "");
2192 unreachable("Uhandled deref type in get_deref_instr_offset");
2196 nir_deref_path_finish(&path
);
2198 if (const_offset
&& offset
)
2199 offset
= LLVMBuildAdd(ctx
->ac
.builder
, offset
,
2200 LLVMConstInt(ctx
->ac
.i32
, const_offset
, 0),
2203 *const_out
= const_offset
;
2204 *indir_out
= offset
;
2207 static LLVMValueRef
load_tess_varyings(struct ac_nir_context
*ctx
,
2208 nir_intrinsic_instr
*instr
,
2211 LLVMValueRef result
;
2212 LLVMValueRef vertex_index
= NULL
;
2213 LLVMValueRef indir_index
= NULL
;
2214 unsigned const_index
= 0;
2216 nir_variable
*var
= nir_deref_instr_get_variable(nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
));
2218 unsigned location
= var
->data
.location
;
2219 unsigned driver_location
= var
->data
.driver_location
;
2220 const bool is_patch
= var
->data
.patch
||
2221 var
->data
.location
== VARYING_SLOT_TESS_LEVEL_INNER
||
2222 var
->data
.location
== VARYING_SLOT_TESS_LEVEL_OUTER
;
2223 const bool is_compact
= var
->data
.compact
;
2225 get_deref_offset(ctx
, nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
),
2226 false, NULL
, is_patch
? NULL
: &vertex_index
,
2227 &const_index
, &indir_index
);
2229 LLVMTypeRef dest_type
= get_def_type(ctx
, &instr
->dest
.ssa
);
2231 LLVMTypeRef src_component_type
;
2232 if (LLVMGetTypeKind(dest_type
) == LLVMVectorTypeKind
)
2233 src_component_type
= LLVMGetElementType(dest_type
);
2235 src_component_type
= dest_type
;
2237 result
= ctx
->abi
->load_tess_varyings(ctx
->abi
, src_component_type
,
2238 vertex_index
, indir_index
,
2239 const_index
, location
, driver_location
,
2240 var
->data
.location_frac
,
2241 instr
->num_components
,
2242 is_patch
, is_compact
, load_inputs
);
2243 if (instr
->dest
.ssa
.bit_size
== 16) {
2244 result
= ac_to_integer(&ctx
->ac
, result
);
2245 result
= LLVMBuildTrunc(ctx
->ac
.builder
, result
, dest_type
, "");
2247 return LLVMBuildBitCast(ctx
->ac
.builder
, result
, dest_type
, "");
2251 type_scalar_size_bytes(const struct glsl_type
*type
)
2253 assert(glsl_type_is_vector_or_scalar(type
) ||
2254 glsl_type_is_matrix(type
));
2255 return glsl_type_is_boolean(type
) ? 4 : glsl_get_bit_size(type
) / 8;
2258 static LLVMValueRef
visit_load_var(struct ac_nir_context
*ctx
,
2259 nir_intrinsic_instr
*instr
)
2261 nir_deref_instr
*deref
= nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
);
2262 nir_variable
*var
= nir_deref_instr_get_variable(deref
);
2264 LLVMValueRef values
[8];
2266 int ve
= instr
->dest
.ssa
.num_components
;
2268 LLVMValueRef indir_index
;
2270 unsigned const_index
;
2271 unsigned stride
= 4;
2272 int mode
= deref
->mode
;
2275 bool vs_in
= ctx
->stage
== MESA_SHADER_VERTEX
&&
2276 var
->data
.mode
== nir_var_shader_in
;
2277 idx
= var
->data
.driver_location
;
2278 comp
= var
->data
.location_frac
;
2279 mode
= var
->data
.mode
;
2281 get_deref_offset(ctx
, deref
, vs_in
, NULL
, NULL
,
2282 &const_index
, &indir_index
);
2284 if (var
->data
.compact
) {
2286 const_index
+= comp
;
2291 if (instr
->dest
.ssa
.bit_size
== 64 &&
2292 (deref
->mode
== nir_var_shader_in
||
2293 deref
->mode
== nir_var_shader_out
||
2294 deref
->mode
== nir_var_function_temp
))
2298 case nir_var_shader_in
:
2299 if (ctx
->stage
== MESA_SHADER_TESS_CTRL
||
2300 ctx
->stage
== MESA_SHADER_TESS_EVAL
) {
2301 return load_tess_varyings(ctx
, instr
, true);
2304 if (ctx
->stage
== MESA_SHADER_GEOMETRY
) {
2305 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->ac
.context
, instr
->dest
.ssa
.bit_size
);
2306 LLVMValueRef indir_index
;
2307 unsigned const_index
, vertex_index
;
2308 get_deref_offset(ctx
, deref
, false, &vertex_index
, NULL
,
2309 &const_index
, &indir_index
);
2310 assert(indir_index
== NULL
);
2312 return ctx
->abi
->load_inputs(ctx
->abi
, var
->data
.location
,
2313 var
->data
.driver_location
,
2314 var
->data
.location_frac
,
2315 instr
->num_components
, vertex_index
, const_index
, type
);
2318 for (unsigned chan
= comp
; chan
< ve
+ comp
; chan
++) {
2320 unsigned count
= glsl_count_attribute_slots(
2322 ctx
->stage
== MESA_SHADER_VERTEX
);
2324 LLVMValueRef tmp_vec
= ac_build_gather_values_extended(
2325 &ctx
->ac
, ctx
->abi
->inputs
+ idx
+ chan
, count
,
2326 stride
, false, true);
2328 values
[chan
] = LLVMBuildExtractElement(ctx
->ac
.builder
,
2332 values
[chan
] = ctx
->abi
->inputs
[idx
+ chan
+ const_index
* stride
];
2335 case nir_var_function_temp
:
2336 for (unsigned chan
= 0; chan
< ve
; chan
++) {
2338 unsigned count
= glsl_count_attribute_slots(
2341 LLVMValueRef tmp_vec
= ac_build_gather_values_extended(
2342 &ctx
->ac
, ctx
->locals
+ idx
+ chan
, count
,
2343 stride
, true, true);
2345 values
[chan
] = LLVMBuildExtractElement(ctx
->ac
.builder
,
2349 values
[chan
] = LLVMBuildLoad(ctx
->ac
.builder
, ctx
->locals
[idx
+ chan
+ const_index
* stride
], "");
2353 case nir_var_shader_out
:
2354 if (ctx
->stage
== MESA_SHADER_TESS_CTRL
) {
2355 return load_tess_varyings(ctx
, instr
, false);
2358 if (ctx
->stage
== MESA_SHADER_FRAGMENT
&&
2359 var
->data
.fb_fetch_output
&&
2360 ctx
->abi
->emit_fbfetch
)
2361 return ctx
->abi
->emit_fbfetch(ctx
->abi
);
2363 for (unsigned chan
= comp
; chan
< ve
+ comp
; chan
++) {
2365 unsigned count
= glsl_count_attribute_slots(
2368 LLVMValueRef tmp_vec
= ac_build_gather_values_extended(
2369 &ctx
->ac
, ctx
->abi
->outputs
+ idx
+ chan
, count
,
2370 stride
, true, true);
2372 values
[chan
] = LLVMBuildExtractElement(ctx
->ac
.builder
,
2376 values
[chan
] = LLVMBuildLoad(ctx
->ac
.builder
,
2377 ctx
->abi
->outputs
[idx
+ chan
+ const_index
* stride
],
2382 case nir_var_mem_global
: {
2383 LLVMValueRef address
= get_src(ctx
, instr
->src
[0]);
2384 LLVMTypeRef result_type
= get_def_type(ctx
, &instr
->dest
.ssa
);
2385 unsigned explicit_stride
= glsl_get_explicit_stride(deref
->type
);
2386 unsigned natural_stride
= type_scalar_size_bytes(deref
->type
);
2387 unsigned stride
= explicit_stride
? explicit_stride
: natural_stride
;
2388 int elem_size_bytes
= ac_get_elem_bits(&ctx
->ac
, result_type
) / 8;
2389 bool split_loads
= ctx
->ac
.chip_class
== GFX6
&& elem_size_bytes
< 4;
2391 if (stride
!= natural_stride
|| split_loads
) {
2392 if (LLVMGetTypeKind(result_type
) == LLVMVectorTypeKind
)
2393 result_type
= LLVMGetElementType(result_type
);
2395 LLVMTypeRef ptr_type
= LLVMPointerType(result_type
,
2396 LLVMGetPointerAddressSpace(LLVMTypeOf(address
)));
2397 address
= LLVMBuildBitCast(ctx
->ac
.builder
, address
, ptr_type
, "");
2399 for (unsigned i
= 0; i
< instr
->dest
.ssa
.num_components
; ++i
) {
2400 LLVMValueRef offset
= LLVMConstInt(ctx
->ac
.i32
, i
* stride
/ natural_stride
, 0);
2401 values
[i
] = LLVMBuildLoad(ctx
->ac
.builder
,
2402 ac_build_gep_ptr(&ctx
->ac
, address
, offset
), "");
2404 return ac_build_gather_values(&ctx
->ac
, values
, instr
->dest
.ssa
.num_components
);
2406 LLVMTypeRef ptr_type
= LLVMPointerType(result_type
,
2407 LLVMGetPointerAddressSpace(LLVMTypeOf(address
)));
2408 address
= LLVMBuildBitCast(ctx
->ac
.builder
, address
, ptr_type
, "");
2409 LLVMValueRef val
= LLVMBuildLoad(ctx
->ac
.builder
, address
, "");
2414 unreachable("unhandle variable mode");
2416 ret
= ac_build_varying_gather_values(&ctx
->ac
, values
, ve
, comp
);
2417 return LLVMBuildBitCast(ctx
->ac
.builder
, ret
, get_def_type(ctx
, &instr
->dest
.ssa
), "");
2421 visit_store_var(struct ac_nir_context
*ctx
,
2422 nir_intrinsic_instr
*instr
)
2424 if (ctx
->ac
.postponed_kill
) {
2425 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
2426 ctx
->ac
.postponed_kill
, "");
2427 ac_build_ifcc(&ctx
->ac
, cond
, 7002);
2430 nir_deref_instr
*deref
= nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
);
2431 nir_variable
*var
= nir_deref_instr_get_variable(deref
);
2433 LLVMValueRef temp_ptr
, value
;
2436 LLVMValueRef src
= ac_to_float(&ctx
->ac
, get_src(ctx
, instr
->src
[1]));
2437 int writemask
= instr
->const_index
[0];
2438 LLVMValueRef indir_index
;
2439 unsigned const_index
;
2442 get_deref_offset(ctx
, deref
, false,
2443 NULL
, NULL
, &const_index
, &indir_index
);
2444 idx
= var
->data
.driver_location
;
2445 comp
= var
->data
.location_frac
;
2447 if (var
->data
.compact
) {
2448 const_index
+= comp
;
2453 if (ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(src
)) == 64 &&
2454 (deref
->mode
== nir_var_shader_out
||
2455 deref
->mode
== nir_var_function_temp
)) {
2457 src
= LLVMBuildBitCast(ctx
->ac
.builder
, src
,
2458 LLVMVectorType(ctx
->ac
.f32
, ac_get_llvm_num_components(src
) * 2),
2461 writemask
= widen_mask(writemask
, 2);
2464 writemask
= writemask
<< comp
;
2466 switch (deref
->mode
) {
2467 case nir_var_shader_out
:
2469 if (ctx
->stage
== MESA_SHADER_TESS_CTRL
) {
2470 LLVMValueRef vertex_index
= NULL
;
2471 LLVMValueRef indir_index
= NULL
;
2472 unsigned const_index
= 0;
2473 const bool is_patch
= var
->data
.patch
||
2474 var
->data
.location
== VARYING_SLOT_TESS_LEVEL_INNER
||
2475 var
->data
.location
== VARYING_SLOT_TESS_LEVEL_OUTER
;
2477 get_deref_offset(ctx
, deref
, false, NULL
,
2478 is_patch
? NULL
: &vertex_index
,
2479 &const_index
, &indir_index
);
2481 ctx
->abi
->store_tcs_outputs(ctx
->abi
, var
,
2482 vertex_index
, indir_index
,
2483 const_index
, src
, writemask
);
2487 for (unsigned chan
= 0; chan
< 8; chan
++) {
2489 if (!(writemask
& (1 << chan
)))
2492 value
= ac_llvm_extract_elem(&ctx
->ac
, src
, chan
- comp
);
2494 if (var
->data
.compact
)
2497 unsigned count
= glsl_count_attribute_slots(
2500 LLVMValueRef tmp_vec
= ac_build_gather_values_extended(
2501 &ctx
->ac
, ctx
->abi
->outputs
+ idx
+ chan
, count
,
2502 stride
, true, true);
2504 tmp_vec
= LLVMBuildInsertElement(ctx
->ac
.builder
, tmp_vec
,
2505 value
, indir_index
, "");
2506 build_store_values_extended(&ctx
->ac
, ctx
->abi
->outputs
+ idx
+ chan
,
2507 count
, stride
, tmp_vec
);
2510 temp_ptr
= ctx
->abi
->outputs
[idx
+ chan
+ const_index
* stride
];
2512 LLVMBuildStore(ctx
->ac
.builder
, value
, temp_ptr
);
2516 case nir_var_function_temp
:
2517 for (unsigned chan
= 0; chan
< 8; chan
++) {
2518 if (!(writemask
& (1 << chan
)))
2521 value
= ac_llvm_extract_elem(&ctx
->ac
, src
, chan
);
2523 unsigned count
= glsl_count_attribute_slots(
2526 LLVMValueRef tmp_vec
= ac_build_gather_values_extended(
2527 &ctx
->ac
, ctx
->locals
+ idx
+ chan
, count
,
2530 tmp_vec
= LLVMBuildInsertElement(ctx
->ac
.builder
, tmp_vec
,
2531 value
, indir_index
, "");
2532 build_store_values_extended(&ctx
->ac
, ctx
->locals
+ idx
+ chan
,
2535 temp_ptr
= ctx
->locals
[idx
+ chan
+ const_index
* 4];
2537 LLVMBuildStore(ctx
->ac
.builder
, value
, temp_ptr
);
2542 case nir_var_mem_global
: {
2543 int writemask
= instr
->const_index
[0];
2544 LLVMValueRef address
= get_src(ctx
, instr
->src
[0]);
2545 LLVMValueRef val
= get_src(ctx
, instr
->src
[1]);
2547 unsigned explicit_stride
= glsl_get_explicit_stride(deref
->type
);
2548 unsigned natural_stride
= type_scalar_size_bytes(deref
->type
);
2549 unsigned stride
= explicit_stride
? explicit_stride
: natural_stride
;
2550 int elem_size_bytes
= ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(val
)) / 8;
2551 bool split_stores
= ctx
->ac
.chip_class
== GFX6
&& elem_size_bytes
< 4;
2553 LLVMTypeRef ptr_type
= LLVMPointerType(LLVMTypeOf(val
),
2554 LLVMGetPointerAddressSpace(LLVMTypeOf(address
)));
2555 address
= LLVMBuildBitCast(ctx
->ac
.builder
, address
, ptr_type
, "");
2557 if (writemask
== (1u << ac_get_llvm_num_components(val
)) - 1 &&
2558 stride
== natural_stride
&& !split_stores
) {
2559 LLVMTypeRef ptr_type
= LLVMPointerType(LLVMTypeOf(val
),
2560 LLVMGetPointerAddressSpace(LLVMTypeOf(address
)));
2561 address
= LLVMBuildBitCast(ctx
->ac
.builder
, address
, ptr_type
, "");
2563 val
= LLVMBuildBitCast(ctx
->ac
.builder
, val
,
2564 LLVMGetElementType(LLVMTypeOf(address
)), "");
2565 LLVMBuildStore(ctx
->ac
.builder
, val
, address
);
2567 LLVMTypeRef val_type
= LLVMTypeOf(val
);
2568 if (LLVMGetTypeKind(LLVMTypeOf(val
)) == LLVMVectorTypeKind
)
2569 val_type
= LLVMGetElementType(val_type
);
2571 LLVMTypeRef ptr_type
= LLVMPointerType(val_type
,
2572 LLVMGetPointerAddressSpace(LLVMTypeOf(address
)));
2573 address
= LLVMBuildBitCast(ctx
->ac
.builder
, address
, ptr_type
, "");
2574 for (unsigned chan
= 0; chan
< 4; chan
++) {
2575 if (!(writemask
& (1 << chan
)))
2578 LLVMValueRef offset
= LLVMConstInt(ctx
->ac
.i32
, chan
* stride
/ natural_stride
, 0);
2580 LLVMValueRef ptr
= ac_build_gep_ptr(&ctx
->ac
, address
, offset
);
2581 LLVMValueRef src
= ac_llvm_extract_elem(&ctx
->ac
, val
,
2583 src
= LLVMBuildBitCast(ctx
->ac
.builder
, src
,
2584 LLVMGetElementType(LLVMTypeOf(ptr
)), "");
2585 LLVMBuildStore(ctx
->ac
.builder
, src
, ptr
);
2595 if (ctx
->ac
.postponed_kill
)
2596 ac_build_endif(&ctx
->ac
, 7002);
2599 static int image_type_to_components_count(enum glsl_sampler_dim dim
, bool array
)
2602 case GLSL_SAMPLER_DIM_BUF
:
2604 case GLSL_SAMPLER_DIM_1D
:
2605 return array
? 2 : 1;
2606 case GLSL_SAMPLER_DIM_2D
:
2607 return array
? 3 : 2;
2608 case GLSL_SAMPLER_DIM_MS
:
2609 return array
? 4 : 3;
2610 case GLSL_SAMPLER_DIM_3D
:
2611 case GLSL_SAMPLER_DIM_CUBE
:
2613 case GLSL_SAMPLER_DIM_RECT
:
2614 case GLSL_SAMPLER_DIM_SUBPASS
:
2616 case GLSL_SAMPLER_DIM_SUBPASS_MS
:
2624 static LLVMValueRef
adjust_sample_index_using_fmask(struct ac_llvm_context
*ctx
,
2625 LLVMValueRef coord_x
, LLVMValueRef coord_y
,
2626 LLVMValueRef coord_z
,
2627 LLVMValueRef sample_index
,
2628 LLVMValueRef fmask_desc_ptr
)
2630 unsigned sample_chan
= coord_z
? 3 : 2;
2631 LLVMValueRef addr
[4] = {coord_x
, coord_y
, coord_z
};
2632 addr
[sample_chan
] = sample_index
;
2634 ac_apply_fmask_to_sample(ctx
, fmask_desc_ptr
, addr
, coord_z
!= NULL
);
2635 return addr
[sample_chan
];
2638 static nir_deref_instr
*get_image_deref(const nir_intrinsic_instr
*instr
)
2640 assert(instr
->src
[0].is_ssa
);
2641 return nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
);
2644 static LLVMValueRef
get_image_descriptor(struct ac_nir_context
*ctx
,
2645 const nir_intrinsic_instr
*instr
,
2646 LLVMValueRef dynamic_index
,
2647 enum ac_descriptor_type desc_type
,
2650 nir_deref_instr
*deref_instr
=
2651 instr
->src
[0].ssa
->parent_instr
->type
== nir_instr_type_deref
?
2652 nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
) : NULL
;
2654 return get_sampler_desc(ctx
, deref_instr
, desc_type
, &instr
->instr
, dynamic_index
, true, write
);
2657 static void get_image_coords(struct ac_nir_context
*ctx
,
2658 const nir_intrinsic_instr
*instr
,
2659 LLVMValueRef dynamic_desc_index
,
2660 struct ac_image_args
*args
,
2661 enum glsl_sampler_dim dim
,
2664 LLVMValueRef src0
= get_src(ctx
, instr
->src
[1]);
2665 LLVMValueRef masks
[] = {
2666 LLVMConstInt(ctx
->ac
.i32
, 0, false), LLVMConstInt(ctx
->ac
.i32
, 1, false),
2667 LLVMConstInt(ctx
->ac
.i32
, 2, false), LLVMConstInt(ctx
->ac
.i32
, 3, false),
2669 LLVMValueRef sample_index
= ac_llvm_extract_elem(&ctx
->ac
, get_src(ctx
, instr
->src
[2]), 0);
2672 ASSERTED
bool add_frag_pos
= (dim
== GLSL_SAMPLER_DIM_SUBPASS
||
2673 dim
== GLSL_SAMPLER_DIM_SUBPASS_MS
);
2674 bool is_ms
= (dim
== GLSL_SAMPLER_DIM_MS
||
2675 dim
== GLSL_SAMPLER_DIM_SUBPASS_MS
);
2676 bool gfx9_1d
= ctx
->ac
.chip_class
== GFX9
&& dim
== GLSL_SAMPLER_DIM_1D
;
2677 assert(!add_frag_pos
&& "Input attachments should be lowered by this point.");
2678 count
= image_type_to_components_count(dim
, is_array
);
2680 if (is_ms
&& (instr
->intrinsic
== nir_intrinsic_image_deref_load
||
2681 instr
->intrinsic
== nir_intrinsic_bindless_image_load
)) {
2682 LLVMValueRef fmask_load_address
[3];
2684 fmask_load_address
[0] = LLVMBuildExtractElement(ctx
->ac
.builder
, src0
, masks
[0], "");
2685 fmask_load_address
[1] = LLVMBuildExtractElement(ctx
->ac
.builder
, src0
, masks
[1], "");
2687 fmask_load_address
[2] = LLVMBuildExtractElement(ctx
->ac
.builder
, src0
, masks
[2], "");
2689 fmask_load_address
[2] = NULL
;
2691 sample_index
= adjust_sample_index_using_fmask(&ctx
->ac
,
2692 fmask_load_address
[0],
2693 fmask_load_address
[1],
2694 fmask_load_address
[2],
2696 get_sampler_desc(ctx
, nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
),
2697 AC_DESC_FMASK
, &instr
->instr
, dynamic_desc_index
, true, false));
2699 if (count
== 1 && !gfx9_1d
) {
2700 if (instr
->src
[1].ssa
->num_components
)
2701 args
->coords
[0] = LLVMBuildExtractElement(ctx
->ac
.builder
, src0
, masks
[0], "");
2703 args
->coords
[0] = src0
;
2708 for (chan
= 0; chan
< count
; ++chan
) {
2709 args
->coords
[chan
] = ac_llvm_extract_elem(&ctx
->ac
, src0
, chan
);
2714 args
->coords
[2] = args
->coords
[1];
2715 args
->coords
[1] = ctx
->ac
.i32_0
;
2717 args
->coords
[1] = ctx
->ac
.i32_0
;
2720 if (ctx
->ac
.chip_class
== GFX9
&&
2721 dim
== GLSL_SAMPLER_DIM_2D
&&
2723 /* The hw can't bind a slice of a 3D image as a 2D
2724 * image, because it ignores BASE_ARRAY if the target
2725 * is 3D. The workaround is to read BASE_ARRAY and set
2726 * it as the 3rd address operand for all 2D images.
2728 LLVMValueRef first_layer
, const5
, mask
;
2730 const5
= LLVMConstInt(ctx
->ac
.i32
, 5, 0);
2731 mask
= LLVMConstInt(ctx
->ac
.i32
, S_008F24_BASE_ARRAY(~0), 0);
2732 first_layer
= LLVMBuildExtractElement(ctx
->ac
.builder
, args
->resource
, const5
, "");
2733 first_layer
= LLVMBuildAnd(ctx
->ac
.builder
, first_layer
, mask
, "");
2735 args
->coords
[count
] = first_layer
;
2741 args
->coords
[count
] = sample_index
;
2747 static LLVMValueRef
get_image_buffer_descriptor(struct ac_nir_context
*ctx
,
2748 const nir_intrinsic_instr
*instr
,
2749 LLVMValueRef dynamic_index
,
2750 bool write
, bool atomic
)
2752 LLVMValueRef rsrc
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_BUFFER
, write
);
2753 if (ctx
->ac
.chip_class
== GFX9
&& LLVM_VERSION_MAJOR
< 9 && atomic
) {
2754 LLVMValueRef elem_count
= LLVMBuildExtractElement(ctx
->ac
.builder
, rsrc
, LLVMConstInt(ctx
->ac
.i32
, 2, 0), "");
2755 LLVMValueRef stride
= LLVMBuildExtractElement(ctx
->ac
.builder
, rsrc
, LLVMConstInt(ctx
->ac
.i32
, 1, 0), "");
2756 stride
= LLVMBuildLShr(ctx
->ac
.builder
, stride
, LLVMConstInt(ctx
->ac
.i32
, 16, 0), "");
2758 LLVMValueRef new_elem_count
= LLVMBuildSelect(ctx
->ac
.builder
,
2759 LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntUGT
, elem_count
, stride
, ""),
2760 elem_count
, stride
, "");
2762 rsrc
= LLVMBuildInsertElement(ctx
->ac
.builder
, rsrc
, new_elem_count
,
2763 LLVMConstInt(ctx
->ac
.i32
, 2, 0), "");
2768 static LLVMValueRef
enter_waterfall_image(struct ac_nir_context
*ctx
,
2769 struct waterfall_context
*wctx
,
2770 const nir_intrinsic_instr
*instr
)
2772 nir_deref_instr
*deref_instr
= NULL
;
2774 if (instr
->src
[0].ssa
->parent_instr
->type
== nir_instr_type_deref
)
2775 deref_instr
= nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
);
2777 LLVMValueRef value
= get_sampler_desc_index(ctx
, deref_instr
, &instr
->instr
, true);
2778 return enter_waterfall(ctx
, wctx
, value
, nir_intrinsic_access(instr
) & ACCESS_NON_UNIFORM
);
2781 static LLVMValueRef
visit_image_load(struct ac_nir_context
*ctx
,
2782 const nir_intrinsic_instr
*instr
,
2787 enum glsl_sampler_dim dim
;
2788 enum gl_access_qualifier access
;
2791 dim
= nir_intrinsic_image_dim(instr
);
2792 access
= nir_intrinsic_access(instr
);
2793 is_array
= nir_intrinsic_image_array(instr
);
2795 const nir_deref_instr
*image_deref
= get_image_deref(instr
);
2796 const struct glsl_type
*type
= image_deref
->type
;
2797 const nir_variable
*var
= nir_deref_instr_get_variable(image_deref
);
2798 dim
= glsl_get_sampler_dim(type
);
2799 access
= var
->data
.access
;
2800 is_array
= glsl_sampler_type_is_array(type
);
2803 struct waterfall_context wctx
;
2804 LLVMValueRef dynamic_index
= enter_waterfall_image(ctx
, &wctx
, instr
);
2806 struct ac_image_args args
= {};
2808 args
.cache_policy
= get_cache_policy(ctx
, access
, false, false);
2810 if (dim
== GLSL_SAMPLER_DIM_BUF
) {
2811 unsigned mask
= nir_ssa_def_components_read(&instr
->dest
.ssa
);
2812 unsigned num_channels
= util_last_bit(mask
);
2813 LLVMValueRef rsrc
, vindex
;
2815 rsrc
= get_image_buffer_descriptor(ctx
, instr
, dynamic_index
, false, false);
2816 vindex
= LLVMBuildExtractElement(ctx
->ac
.builder
, get_src(ctx
, instr
->src
[1]),
2819 assert(instr
->dest
.is_ssa
);
2820 bool can_speculate
= access
& ACCESS_CAN_REORDER
;
2821 res
= ac_build_buffer_load_format(&ctx
->ac
, rsrc
, vindex
,
2822 ctx
->ac
.i32_0
, num_channels
,
2825 instr
->dest
.ssa
.bit_size
== 16);
2826 res
= ac_build_expand_to_vec4(&ctx
->ac
, res
, num_channels
);
2828 res
= ac_trim_vector(&ctx
->ac
, res
, instr
->dest
.ssa
.num_components
);
2829 res
= ac_to_integer(&ctx
->ac
, res
);
2831 bool level_zero
= nir_src_is_const(instr
->src
[3]) && nir_src_as_uint(instr
->src
[3]) == 0;
2833 args
.opcode
= level_zero
? ac_image_load
: ac_image_load_mip
;
2834 args
.resource
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_IMAGE
, false);
2835 get_image_coords(ctx
, instr
, dynamic_index
, &args
, dim
, is_array
);
2836 args
.dim
= ac_get_image_dim(ctx
->ac
.chip_class
, dim
, is_array
);
2838 args
.lod
= get_src(ctx
, instr
->src
[3]);
2840 args
.attributes
= AC_FUNC_ATTR_READONLY
;
2842 assert(instr
->dest
.is_ssa
);
2843 args
.d16
= instr
->dest
.ssa
.bit_size
== 16;
2845 res
= ac_build_image_opcode(&ctx
->ac
, &args
);
2847 return exit_waterfall(ctx
, &wctx
, res
);
2850 static void visit_image_store(struct ac_nir_context
*ctx
,
2851 const nir_intrinsic_instr
*instr
,
2854 if (ctx
->ac
.postponed_kill
) {
2855 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
2856 ctx
->ac
.postponed_kill
, "");
2857 ac_build_ifcc(&ctx
->ac
, cond
, 7003);
2860 enum glsl_sampler_dim dim
;
2861 enum gl_access_qualifier access
;
2865 dim
= nir_intrinsic_image_dim(instr
);
2866 access
= nir_intrinsic_access(instr
);
2867 is_array
= nir_intrinsic_image_array(instr
);
2869 const nir_deref_instr
*image_deref
= get_image_deref(instr
);
2870 const struct glsl_type
*type
= image_deref
->type
;
2871 const nir_variable
*var
= nir_deref_instr_get_variable(image_deref
);
2872 dim
= glsl_get_sampler_dim(type
);
2873 access
= var
->data
.access
;
2874 is_array
= glsl_sampler_type_is_array(type
);
2877 struct waterfall_context wctx
;
2878 LLVMValueRef dynamic_index
= enter_waterfall_image(ctx
, &wctx
, instr
);
2880 bool writeonly_memory
= access
& ACCESS_NON_READABLE
;
2881 struct ac_image_args args
= {};
2883 args
.cache_policy
= get_cache_policy(ctx
, access
, true, writeonly_memory
);
2885 if (dim
== GLSL_SAMPLER_DIM_BUF
) {
2886 LLVMValueRef rsrc
= get_image_buffer_descriptor(ctx
, instr
, dynamic_index
, true, false);
2887 LLVMValueRef src
= ac_to_float(&ctx
->ac
, get_src(ctx
, instr
->src
[3]));
2888 unsigned src_channels
= ac_get_llvm_num_components(src
);
2889 LLVMValueRef vindex
;
2891 if (src_channels
== 3)
2892 src
= ac_build_expand_to_vec4(&ctx
->ac
, src
, 3);
2894 vindex
= LLVMBuildExtractElement(ctx
->ac
.builder
,
2895 get_src(ctx
, instr
->src
[1]),
2898 ac_build_buffer_store_format(&ctx
->ac
, rsrc
, src
, vindex
,
2899 ctx
->ac
.i32_0
, args
.cache_policy
);
2901 bool level_zero
= nir_src_is_const(instr
->src
[4]) && nir_src_as_uint(instr
->src
[4]) == 0;
2903 args
.opcode
= level_zero
? ac_image_store
: ac_image_store_mip
;
2904 args
.data
[0] = ac_to_float(&ctx
->ac
, get_src(ctx
, instr
->src
[3]));
2905 args
.resource
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_IMAGE
, true);
2906 get_image_coords(ctx
, instr
, dynamic_index
, &args
, dim
, is_array
);
2907 args
.dim
= ac_get_image_dim(ctx
->ac
.chip_class
, dim
, is_array
);
2909 args
.lod
= get_src(ctx
, instr
->src
[4]);
2911 args
.d16
= ac_get_elem_bits(&ctx
->ac
, LLVMTypeOf(args
.data
[0])) == 16;
2913 ac_build_image_opcode(&ctx
->ac
, &args
);
2916 exit_waterfall(ctx
, &wctx
, NULL
);
2917 if (ctx
->ac
.postponed_kill
)
2918 ac_build_endif(&ctx
->ac
, 7003);
2921 static LLVMValueRef
visit_image_atomic(struct ac_nir_context
*ctx
,
2922 const nir_intrinsic_instr
*instr
,
2925 if (ctx
->ac
.postponed_kill
) {
2926 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
2927 ctx
->ac
.postponed_kill
, "");
2928 ac_build_ifcc(&ctx
->ac
, cond
, 7004);
2931 LLVMValueRef params
[7];
2932 int param_count
= 0;
2934 bool cmpswap
= instr
->intrinsic
== nir_intrinsic_image_deref_atomic_comp_swap
||
2935 instr
->intrinsic
== nir_intrinsic_bindless_image_atomic_comp_swap
;
2936 const char *atomic_name
;
2937 char intrinsic_name
[64];
2938 enum ac_atomic_op atomic_subop
;
2939 ASSERTED
int length
;
2941 enum glsl_sampler_dim dim
;
2944 if (instr
->intrinsic
== nir_intrinsic_bindless_image_atomic_imin
||
2945 instr
->intrinsic
== nir_intrinsic_bindless_image_atomic_umin
||
2946 instr
->intrinsic
== nir_intrinsic_bindless_image_atomic_imax
||
2947 instr
->intrinsic
== nir_intrinsic_bindless_image_atomic_umax
) {
2948 ASSERTED
const GLenum format
= nir_intrinsic_format(instr
);
2949 assert(format
== GL_R32UI
|| format
== GL_R32I
);
2951 dim
= nir_intrinsic_image_dim(instr
);
2952 is_array
= nir_intrinsic_image_array(instr
);
2954 const struct glsl_type
*type
= get_image_deref(instr
)->type
;
2955 dim
= glsl_get_sampler_dim(type
);
2956 is_array
= glsl_sampler_type_is_array(type
);
2959 struct waterfall_context wctx
;
2960 LLVMValueRef dynamic_index
= enter_waterfall_image(ctx
, &wctx
, instr
);
2962 switch (instr
->intrinsic
) {
2963 case nir_intrinsic_bindless_image_atomic_add
:
2964 case nir_intrinsic_image_deref_atomic_add
:
2965 atomic_name
= "add";
2966 atomic_subop
= ac_atomic_add
;
2968 case nir_intrinsic_bindless_image_atomic_imin
:
2969 case nir_intrinsic_image_deref_atomic_imin
:
2970 atomic_name
= "smin";
2971 atomic_subop
= ac_atomic_smin
;
2973 case nir_intrinsic_bindless_image_atomic_umin
:
2974 case nir_intrinsic_image_deref_atomic_umin
:
2975 atomic_name
= "umin";
2976 atomic_subop
= ac_atomic_umin
;
2978 case nir_intrinsic_bindless_image_atomic_imax
:
2979 case nir_intrinsic_image_deref_atomic_imax
:
2980 atomic_name
= "smax";
2981 atomic_subop
= ac_atomic_smax
;
2983 case nir_intrinsic_bindless_image_atomic_umax
:
2984 case nir_intrinsic_image_deref_atomic_umax
:
2985 atomic_name
= "umax";
2986 atomic_subop
= ac_atomic_umax
;
2988 case nir_intrinsic_bindless_image_atomic_and
:
2989 case nir_intrinsic_image_deref_atomic_and
:
2990 atomic_name
= "and";
2991 atomic_subop
= ac_atomic_and
;
2993 case nir_intrinsic_bindless_image_atomic_or
:
2994 case nir_intrinsic_image_deref_atomic_or
:
2996 atomic_subop
= ac_atomic_or
;
2998 case nir_intrinsic_bindless_image_atomic_xor
:
2999 case nir_intrinsic_image_deref_atomic_xor
:
3000 atomic_name
= "xor";
3001 atomic_subop
= ac_atomic_xor
;
3003 case nir_intrinsic_bindless_image_atomic_exchange
:
3004 case nir_intrinsic_image_deref_atomic_exchange
:
3005 atomic_name
= "swap";
3006 atomic_subop
= ac_atomic_swap
;
3008 case nir_intrinsic_bindless_image_atomic_comp_swap
:
3009 case nir_intrinsic_image_deref_atomic_comp_swap
:
3010 atomic_name
= "cmpswap";
3011 atomic_subop
= 0; /* not used */
3013 case nir_intrinsic_bindless_image_atomic_inc_wrap
:
3014 case nir_intrinsic_image_deref_atomic_inc_wrap
: {
3015 atomic_name
= "inc";
3016 atomic_subop
= ac_atomic_inc_wrap
;
3017 /* ATOMIC_INC instruction does:
3018 * value = (value + 1) % (data + 1)
3020 * value = (value + 1) % data
3021 * So replace 'data' by 'data - 1'.
3023 ctx
->ssa_defs
[instr
->src
[3].ssa
->index
] =
3024 LLVMBuildSub(ctx
->ac
.builder
,
3025 ctx
->ssa_defs
[instr
->src
[3].ssa
->index
],
3029 case nir_intrinsic_bindless_image_atomic_dec_wrap
:
3030 case nir_intrinsic_image_deref_atomic_dec_wrap
:
3031 atomic_name
= "dec";
3032 atomic_subop
= ac_atomic_dec_wrap
;
3039 params
[param_count
++] = get_src(ctx
, instr
->src
[4]);
3040 params
[param_count
++] = get_src(ctx
, instr
->src
[3]);
3042 LLVMValueRef result
;
3043 if (dim
== GLSL_SAMPLER_DIM_BUF
) {
3044 params
[param_count
++] = get_image_buffer_descriptor(ctx
, instr
, dynamic_index
, true, true);
3045 params
[param_count
++] = LLVMBuildExtractElement(ctx
->ac
.builder
, get_src(ctx
, instr
->src
[1]),
3046 ctx
->ac
.i32_0
, ""); /* vindex */
3047 params
[param_count
++] = ctx
->ac
.i32_0
; /* voffset */
3048 if (LLVM_VERSION_MAJOR
>= 9) {
3049 /* XXX: The new raw/struct atomic intrinsics are buggy
3050 * with LLVM 8, see r358579.
3052 params
[param_count
++] = ctx
->ac
.i32_0
; /* soffset */
3053 params
[param_count
++] = ctx
->ac
.i32_0
; /* slc */
3055 length
= snprintf(intrinsic_name
, sizeof(intrinsic_name
),
3056 "llvm.amdgcn.struct.buffer.atomic.%s.i32", atomic_name
);
3058 params
[param_count
++] = ctx
->ac
.i1false
; /* slc */
3060 length
= snprintf(intrinsic_name
, sizeof(intrinsic_name
),
3061 "llvm.amdgcn.buffer.atomic.%s", atomic_name
);
3064 assert(length
< sizeof(intrinsic_name
));
3065 result
= ac_build_intrinsic(&ctx
->ac
, intrinsic_name
, ctx
->ac
.i32
,
3066 params
, param_count
, 0);
3068 struct ac_image_args args
= {};
3069 args
.opcode
= cmpswap
? ac_image_atomic_cmpswap
: ac_image_atomic
;
3070 args
.atomic
= atomic_subop
;
3071 args
.data
[0] = params
[0];
3073 args
.data
[1] = params
[1];
3074 args
.resource
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_IMAGE
, true);
3075 get_image_coords(ctx
, instr
, dynamic_index
, &args
, dim
, is_array
);
3076 args
.dim
= ac_get_image_dim(ctx
->ac
.chip_class
, dim
, is_array
);
3078 result
= ac_build_image_opcode(&ctx
->ac
, &args
);
3081 result
= exit_waterfall(ctx
, &wctx
, result
);
3082 if (ctx
->ac
.postponed_kill
)
3083 ac_build_endif(&ctx
->ac
, 7004);
3087 static LLVMValueRef
visit_image_samples(struct ac_nir_context
*ctx
,
3088 nir_intrinsic_instr
*instr
)
3090 struct waterfall_context wctx
;
3091 LLVMValueRef dynamic_index
= enter_waterfall_image(ctx
, &wctx
, instr
);
3092 LLVMValueRef rsrc
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_IMAGE
, false);
3094 LLVMValueRef ret
= ac_build_image_get_sample_count(&ctx
->ac
, rsrc
);
3096 return exit_waterfall(ctx
, &wctx
, ret
);
3099 static LLVMValueRef
visit_image_size(struct ac_nir_context
*ctx
,
3100 const nir_intrinsic_instr
*instr
,
3105 enum glsl_sampler_dim dim
;
3108 dim
= nir_intrinsic_image_dim(instr
);
3109 is_array
= nir_intrinsic_image_array(instr
);
3111 const struct glsl_type
*type
= get_image_deref(instr
)->type
;
3112 dim
= glsl_get_sampler_dim(type
);
3113 is_array
= glsl_sampler_type_is_array(type
);
3116 struct waterfall_context wctx
;
3117 LLVMValueRef dynamic_index
= enter_waterfall_image(ctx
, &wctx
, instr
);
3119 if (dim
== GLSL_SAMPLER_DIM_BUF
) {
3120 res
= get_buffer_size(ctx
, get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_BUFFER
, false), true);
3123 struct ac_image_args args
= { 0 };
3125 args
.dim
= ac_get_image_dim(ctx
->ac
.chip_class
, dim
, is_array
);
3127 args
.resource
= get_image_descriptor(ctx
, instr
, dynamic_index
, AC_DESC_IMAGE
, false);
3128 args
.opcode
= ac_image_get_resinfo
;
3129 args
.lod
= ctx
->ac
.i32_0
;
3130 args
.attributes
= AC_FUNC_ATTR_READNONE
;
3132 res
= ac_build_image_opcode(&ctx
->ac
, &args
);
3134 LLVMValueRef two
= LLVMConstInt(ctx
->ac
.i32
, 2, false);
3136 if (dim
== GLSL_SAMPLER_DIM_CUBE
&& is_array
) {
3137 LLVMValueRef six
= LLVMConstInt(ctx
->ac
.i32
, 6, false);
3138 LLVMValueRef z
= LLVMBuildExtractElement(ctx
->ac
.builder
, res
, two
, "");
3139 z
= LLVMBuildSDiv(ctx
->ac
.builder
, z
, six
, "");
3140 res
= LLVMBuildInsertElement(ctx
->ac
.builder
, res
, z
, two
, "");
3143 if (ctx
->ac
.chip_class
== GFX9
&& dim
== GLSL_SAMPLER_DIM_1D
&& is_array
) {
3144 LLVMValueRef layers
= LLVMBuildExtractElement(ctx
->ac
.builder
, res
, two
, "");
3145 res
= LLVMBuildInsertElement(ctx
->ac
.builder
, res
, layers
,
3149 return exit_waterfall(ctx
, &wctx
, res
);
3152 static void emit_membar(struct ac_llvm_context
*ac
,
3153 const nir_intrinsic_instr
*instr
)
3155 unsigned wait_flags
= 0;
3157 switch (instr
->intrinsic
) {
3158 case nir_intrinsic_memory_barrier
:
3159 case nir_intrinsic_group_memory_barrier
:
3160 wait_flags
= AC_WAIT_LGKM
| AC_WAIT_VLOAD
| AC_WAIT_VSTORE
;
3162 case nir_intrinsic_memory_barrier_buffer
:
3163 case nir_intrinsic_memory_barrier_image
:
3164 wait_flags
= AC_WAIT_VLOAD
| AC_WAIT_VSTORE
;
3166 case nir_intrinsic_memory_barrier_shared
:
3167 wait_flags
= AC_WAIT_LGKM
;
3173 ac_build_waitcnt(ac
, wait_flags
);
3176 void ac_emit_barrier(struct ac_llvm_context
*ac
, gl_shader_stage stage
)
3178 /* GFX6 only (thanks to a hw bug workaround):
3179 * The real barrier instruction isn’t needed, because an entire patch
3180 * always fits into a single wave.
3182 if (ac
->chip_class
== GFX6
&& stage
== MESA_SHADER_TESS_CTRL
) {
3183 ac_build_waitcnt(ac
, AC_WAIT_LGKM
| AC_WAIT_VLOAD
| AC_WAIT_VSTORE
);
3186 ac_build_s_barrier(ac
);
3189 static void emit_discard(struct ac_nir_context
*ctx
,
3190 const nir_intrinsic_instr
*instr
)
3194 if (instr
->intrinsic
== nir_intrinsic_discard_if
) {
3195 cond
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntEQ
,
3196 get_src(ctx
, instr
->src
[0]),
3199 assert(instr
->intrinsic
== nir_intrinsic_discard
);
3200 cond
= ctx
->ac
.i1false
;
3203 ac_build_kill_if_false(&ctx
->ac
, cond
);
3206 static void emit_demote(struct ac_nir_context
*ctx
,
3207 const nir_intrinsic_instr
*instr
)
3211 if (instr
->intrinsic
== nir_intrinsic_demote_if
) {
3212 cond
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntEQ
,
3213 get_src(ctx
, instr
->src
[0]),
3216 assert(instr
->intrinsic
== nir_intrinsic_demote
);
3217 cond
= ctx
->ac
.i1false
;
3220 /* Kill immediately while maintaining WQM. */
3221 ac_build_kill_if_false(&ctx
->ac
, ac_build_wqm_vote(&ctx
->ac
, cond
));
3223 LLVMValueRef mask
= LLVMBuildLoad(ctx
->ac
.builder
, ctx
->ac
.postponed_kill
, "");
3224 mask
= LLVMBuildAnd(ctx
->ac
.builder
, mask
, cond
, "");
3225 LLVMBuildStore(ctx
->ac
.builder
, mask
, ctx
->ac
.postponed_kill
);
3230 visit_load_local_invocation_index(struct ac_nir_context
*ctx
)
3232 LLVMValueRef result
;
3233 LLVMValueRef thread_id
= ac_get_thread_id(&ctx
->ac
);
3234 result
= LLVMBuildAnd(ctx
->ac
.builder
,
3235 ac_get_arg(&ctx
->ac
, ctx
->args
->tg_size
),
3236 LLVMConstInt(ctx
->ac
.i32
, 0xfc0, false), "");
3238 if (ctx
->ac
.wave_size
== 32)
3239 result
= LLVMBuildLShr(ctx
->ac
.builder
, result
,
3240 LLVMConstInt(ctx
->ac
.i32
, 1, false), "");
3242 return LLVMBuildAdd(ctx
->ac
.builder
, result
, thread_id
, "");
3246 visit_load_subgroup_id(struct ac_nir_context
*ctx
)
3248 if (ctx
->stage
== MESA_SHADER_COMPUTE
) {
3249 LLVMValueRef result
;
3250 result
= LLVMBuildAnd(ctx
->ac
.builder
,
3251 ac_get_arg(&ctx
->ac
, ctx
->args
->tg_size
),
3252 LLVMConstInt(ctx
->ac
.i32
, 0xfc0, false), "");
3253 return LLVMBuildLShr(ctx
->ac
.builder
, result
, LLVMConstInt(ctx
->ac
.i32
, 6, false), "");
3255 return LLVMConstInt(ctx
->ac
.i32
, 0, false);
3260 visit_load_num_subgroups(struct ac_nir_context
*ctx
)
3262 if (ctx
->stage
== MESA_SHADER_COMPUTE
) {
3263 return LLVMBuildAnd(ctx
->ac
.builder
,
3264 ac_get_arg(&ctx
->ac
, ctx
->args
->tg_size
),
3265 LLVMConstInt(ctx
->ac
.i32
, 0x3f, false), "");
3267 return LLVMConstInt(ctx
->ac
.i32
, 1, false);
3272 visit_first_invocation(struct ac_nir_context
*ctx
)
3274 LLVMValueRef active_set
= ac_build_ballot(&ctx
->ac
, ctx
->ac
.i32_1
);
3275 const char *intr
= ctx
->ac
.wave_size
== 32 ? "llvm.cttz.i32" : "llvm.cttz.i64";
3277 /* The second argument is whether cttz(0) should be defined, but we do not care. */
3278 LLVMValueRef args
[] = {active_set
, ctx
->ac
.i1false
};
3279 LLVMValueRef result
= ac_build_intrinsic(&ctx
->ac
, intr
,
3280 ctx
->ac
.iN_wavemask
, args
, 2,
3281 AC_FUNC_ATTR_NOUNWIND
|
3282 AC_FUNC_ATTR_READNONE
);
3284 return LLVMBuildTrunc(ctx
->ac
.builder
, result
, ctx
->ac
.i32
, "");
3288 visit_load_shared(struct ac_nir_context
*ctx
,
3289 const nir_intrinsic_instr
*instr
)
3291 LLVMValueRef values
[4], derived_ptr
, index
, ret
;
3293 LLVMValueRef ptr
= get_memory_ptr(ctx
, instr
->src
[0],
3294 instr
->dest
.ssa
.bit_size
);
3296 for (int chan
= 0; chan
< instr
->num_components
; chan
++) {
3297 index
= LLVMConstInt(ctx
->ac
.i32
, chan
, 0);
3298 derived_ptr
= LLVMBuildGEP(ctx
->ac
.builder
, ptr
, &index
, 1, "");
3299 values
[chan
] = LLVMBuildLoad(ctx
->ac
.builder
, derived_ptr
, "");
3302 ret
= ac_build_gather_values(&ctx
->ac
, values
, instr
->num_components
);
3303 return LLVMBuildBitCast(ctx
->ac
.builder
, ret
, get_def_type(ctx
, &instr
->dest
.ssa
), "");
3307 visit_store_shared(struct ac_nir_context
*ctx
,
3308 const nir_intrinsic_instr
*instr
)
3310 LLVMValueRef derived_ptr
, data
,index
;
3311 LLVMBuilderRef builder
= ctx
->ac
.builder
;
3313 LLVMValueRef ptr
= get_memory_ptr(ctx
, instr
->src
[1],
3314 instr
->src
[0].ssa
->bit_size
);
3315 LLVMValueRef src
= get_src(ctx
, instr
->src
[0]);
3317 int writemask
= nir_intrinsic_write_mask(instr
);
3318 for (int chan
= 0; chan
< 4; chan
++) {
3319 if (!(writemask
& (1 << chan
))) {
3322 data
= ac_llvm_extract_elem(&ctx
->ac
, src
, chan
);
3323 index
= LLVMConstInt(ctx
->ac
.i32
, chan
, 0);
3324 derived_ptr
= LLVMBuildGEP(builder
, ptr
, &index
, 1, "");
3325 LLVMBuildStore(builder
, data
, derived_ptr
);
3329 static LLVMValueRef
visit_var_atomic(struct ac_nir_context
*ctx
,
3330 const nir_intrinsic_instr
*instr
,
3331 LLVMValueRef ptr
, int src_idx
)
3333 if (ctx
->ac
.postponed_kill
) {
3334 LLVMValueRef cond
= LLVMBuildLoad(ctx
->ac
.builder
,
3335 ctx
->ac
.postponed_kill
, "");
3336 ac_build_ifcc(&ctx
->ac
, cond
, 7005);
3339 LLVMValueRef result
;
3340 LLVMValueRef src
= get_src(ctx
, instr
->src
[src_idx
]);
3342 const char *sync_scope
= LLVM_VERSION_MAJOR
>= 9 ? "workgroup-one-as" : "workgroup";
3344 if (instr
->src
[0].ssa
->parent_instr
->type
== nir_instr_type_deref
) {
3345 nir_deref_instr
*deref
= nir_instr_as_deref(instr
->src
[0].ssa
->parent_instr
);
3346 if (deref
->mode
== nir_var_mem_global
) {
3347 /* use "singlethread" sync scope to implement relaxed ordering */
3348 sync_scope
= LLVM_VERSION_MAJOR
>= 9 ? "singlethread-one-as" : "singlethread";
3350 LLVMTypeRef ptr_type
= LLVMPointerType(LLVMTypeOf(src
), LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
)));
3351 ptr
= LLVMBuildBitCast(ctx
->ac
.builder
, ptr
, ptr_type
, "");
3355 if (instr
->intrinsic
== nir_intrinsic_shared_atomic_comp_swap
||
3356 instr
->intrinsic
== nir_intrinsic_deref_atomic_comp_swap
) {
3357 LLVMValueRef src1
= get_src(ctx
, instr
->src
[src_idx
+ 1]);
3358 result
= ac_build_atomic_cmp_xchg(&ctx
->ac
, ptr
, src
, src1
, sync_scope
);
3359 result
= LLVMBuildExtractValue(ctx
->ac
.builder
, result
, 0, "");
3361 LLVMAtomicRMWBinOp op
;
3362 switch (instr
->intrinsic
) {
3363 case nir_intrinsic_shared_atomic_add
:
3364 case nir_intrinsic_deref_atomic_add
:
3365 op
= LLVMAtomicRMWBinOpAdd
;
3367 case nir_intrinsic_shared_atomic_umin
:
3368 case nir_intrinsic_deref_atomic_umin
:
3369 op
= LLVMAtomicRMWBinOpUMin
;
3371 case nir_intrinsic_shared_atomic_umax
:
3372 case nir_intrinsic_deref_atomic_umax
:
3373 op
= LLVMAtomicRMWBinOpUMax
;
3375 case nir_intrinsic_shared_atomic_imin
:
3376 case nir_intrinsic_deref_atomic_imin
:
3377 op
= LLVMAtomicRMWBinOpMin
;
3379 case nir_intrinsic_shared_atomic_imax
:
3380 case nir_intrinsic_deref_atomic_imax
:
3381 op
= LLVMAtomicRMWBinOpMax
;
3383 case nir_intrinsic_shared_atomic_and
:
3384 case nir_intrinsic_deref_atomic_and
:
3385 op
= LLVMAtomicRMWBinOpAnd
;
3387 case nir_intrinsic_shared_atomic_or
:
3388 case nir_intrinsic_deref_atomic_or
:
3389 op
= LLVMAtomicRMWBinOpOr
;
3391 case nir_intrinsic_shared_atomic_xor
:
3392 case nir_intrinsic_deref_atomic_xor
:
3393 op
= LLVMAtomicRMWBinOpXor
;
3395 case nir_intrinsic_shared_atomic_exchange
:
3396 case nir_intrinsic_deref_atomic_exchange
:
3397 op
= LLVMAtomicRMWBinOpXchg
;
3403 result
= ac_build_atomic_rmw(&ctx
->ac
, op
, ptr
, ac_to_integer(&ctx
->ac
, src
), sync_scope
);
3406 if (ctx
->ac
.postponed_kill
)
3407 ac_build_endif(&ctx
->ac
, 7005);
3411 static LLVMValueRef
load_sample_pos(struct ac_nir_context
*ctx
)
3413 LLVMValueRef values
[2];
3414 LLVMValueRef pos
[2];
3416 pos
[0] = ac_to_float(&ctx
->ac
,
3417 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[0]));
3418 pos
[1] = ac_to_float(&ctx
->ac
,
3419 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[1]));
3421 values
[0] = ac_build_fract(&ctx
->ac
, pos
[0], 32);
3422 values
[1] = ac_build_fract(&ctx
->ac
, pos
[1], 32);
3423 return ac_build_gather_values(&ctx
->ac
, values
, 2);
3426 static LLVMValueRef
lookup_interp_param(struct ac_nir_context
*ctx
,
3427 enum glsl_interp_mode interp
, unsigned location
)
3430 case INTERP_MODE_FLAT
:
3433 case INTERP_MODE_SMOOTH
:
3434 case INTERP_MODE_NONE
:
3435 if (location
== INTERP_CENTER
)
3436 return ac_get_arg(&ctx
->ac
, ctx
->args
->persp_center
);
3437 else if (location
== INTERP_CENTROID
)
3438 return ctx
->abi
->persp_centroid
;
3439 else if (location
== INTERP_SAMPLE
)
3440 return ac_get_arg(&ctx
->ac
, ctx
->args
->persp_sample
);
3442 case INTERP_MODE_NOPERSPECTIVE
:
3443 if (location
== INTERP_CENTER
)
3444 return ac_get_arg(&ctx
->ac
, ctx
->args
->linear_center
);
3445 else if (location
== INTERP_CENTROID
)
3446 return ctx
->abi
->linear_centroid
;
3447 else if (location
== INTERP_SAMPLE
)
3448 return ac_get_arg(&ctx
->ac
, ctx
->args
->linear_sample
);
3454 static LLVMValueRef
barycentric_center(struct ac_nir_context
*ctx
,
3457 LLVMValueRef interp_param
= lookup_interp_param(ctx
, mode
, INTERP_CENTER
);
3458 return LLVMBuildBitCast(ctx
->ac
.builder
, interp_param
, ctx
->ac
.v2i32
, "");
3461 static LLVMValueRef
barycentric_offset(struct ac_nir_context
*ctx
,
3463 LLVMValueRef offset
)
3465 LLVMValueRef interp_param
= lookup_interp_param(ctx
, mode
, INTERP_CENTER
);
3466 LLVMValueRef src_c0
= ac_to_float(&ctx
->ac
, LLVMBuildExtractElement(ctx
->ac
.builder
, offset
, ctx
->ac
.i32_0
, ""));
3467 LLVMValueRef src_c1
= ac_to_float(&ctx
->ac
, LLVMBuildExtractElement(ctx
->ac
.builder
, offset
, ctx
->ac
.i32_1
, ""));
3469 LLVMValueRef ij_out
[2];
3470 LLVMValueRef ddxy_out
= ac_build_ddxy_interp(&ctx
->ac
, interp_param
);
3473 * take the I then J parameters, and the DDX/Y for it, and
3474 * calculate the IJ inputs for the interpolator.
3475 * temp1 = ddx * offset/sample.x + I;
3476 * interp_param.I = ddy * offset/sample.y + temp1;
3477 * temp1 = ddx * offset/sample.x + J;
3478 * interp_param.J = ddy * offset/sample.y + temp1;
3480 for (unsigned i
= 0; i
< 2; i
++) {
3481 LLVMValueRef ix_ll
= LLVMConstInt(ctx
->ac
.i32
, i
, false);
3482 LLVMValueRef iy_ll
= LLVMConstInt(ctx
->ac
.i32
, i
+ 2, false);
3483 LLVMValueRef ddx_el
= LLVMBuildExtractElement(ctx
->ac
.builder
,
3484 ddxy_out
, ix_ll
, "");
3485 LLVMValueRef ddy_el
= LLVMBuildExtractElement(ctx
->ac
.builder
,
3486 ddxy_out
, iy_ll
, "");
3487 LLVMValueRef interp_el
= LLVMBuildExtractElement(ctx
->ac
.builder
,
3488 interp_param
, ix_ll
, "");
3489 LLVMValueRef temp1
, temp2
;
3491 interp_el
= LLVMBuildBitCast(ctx
->ac
.builder
, interp_el
,
3494 temp1
= ac_build_fmad(&ctx
->ac
, ddx_el
, src_c0
, interp_el
);
3495 temp2
= ac_build_fmad(&ctx
->ac
, ddy_el
, src_c1
, temp1
);
3497 ij_out
[i
] = LLVMBuildBitCast(ctx
->ac
.builder
,
3498 temp2
, ctx
->ac
.i32
, "");
3500 interp_param
= ac_build_gather_values(&ctx
->ac
, ij_out
, 2);
3501 return LLVMBuildBitCast(ctx
->ac
.builder
, interp_param
, ctx
->ac
.v2i32
, "");
3504 static LLVMValueRef
barycentric_centroid(struct ac_nir_context
*ctx
,
3507 LLVMValueRef interp_param
= lookup_interp_param(ctx
, mode
, INTERP_CENTROID
);
3508 return LLVMBuildBitCast(ctx
->ac
.builder
, interp_param
, ctx
->ac
.v2i32
, "");
3511 static LLVMValueRef
barycentric_at_sample(struct ac_nir_context
*ctx
,
3513 LLVMValueRef sample_id
)
3515 if (ctx
->abi
->interp_at_sample_force_center
)
3516 return barycentric_center(ctx
, mode
);
3518 LLVMValueRef halfval
= LLVMConstReal(ctx
->ac
.f32
, 0.5f
);
3520 /* fetch sample ID */
3521 LLVMValueRef sample_pos
= ctx
->abi
->load_sample_position(ctx
->abi
, sample_id
);
3523 LLVMValueRef src_c0
= LLVMBuildExtractElement(ctx
->ac
.builder
, sample_pos
, ctx
->ac
.i32_0
, "");
3524 src_c0
= LLVMBuildFSub(ctx
->ac
.builder
, src_c0
, halfval
, "");
3525 LLVMValueRef src_c1
= LLVMBuildExtractElement(ctx
->ac
.builder
, sample_pos
, ctx
->ac
.i32_1
, "");
3526 src_c1
= LLVMBuildFSub(ctx
->ac
.builder
, src_c1
, halfval
, "");
3527 LLVMValueRef coords
[] = { src_c0
, src_c1
};
3528 LLVMValueRef offset
= ac_build_gather_values(&ctx
->ac
, coords
, 2);
3530 return barycentric_offset(ctx
, mode
, offset
);
3534 static LLVMValueRef
barycentric_sample(struct ac_nir_context
*ctx
,
3537 LLVMValueRef interp_param
= lookup_interp_param(ctx
, mode
, INTERP_SAMPLE
);
3538 return LLVMBuildBitCast(ctx
->ac
.builder
, interp_param
, ctx
->ac
.v2i32
, "");
3541 static LLVMValueRef
barycentric_model(struct ac_nir_context
*ctx
)
3543 return LLVMBuildBitCast(ctx
->ac
.builder
,
3544 ac_get_arg(&ctx
->ac
, ctx
->args
->pull_model
),
3548 static LLVMValueRef
load_interpolated_input(struct ac_nir_context
*ctx
,
3549 LLVMValueRef interp_param
,
3550 unsigned index
, unsigned comp_start
,
3551 unsigned num_components
,
3554 LLVMValueRef attr_number
= LLVMConstInt(ctx
->ac
.i32
, index
, false);
3555 LLVMValueRef interp_param_f
;
3557 interp_param_f
= LLVMBuildBitCast(ctx
->ac
.builder
,
3558 interp_param
, ctx
->ac
.v2f32
, "");
3559 LLVMValueRef i
= LLVMBuildExtractElement(
3560 ctx
->ac
.builder
, interp_param_f
, ctx
->ac
.i32_0
, "");
3561 LLVMValueRef j
= LLVMBuildExtractElement(
3562 ctx
->ac
.builder
, interp_param_f
, ctx
->ac
.i32_1
, "");
3564 /* Workaround for issue 2647: kill threads with infinite interpolation coeffs */
3565 if (ctx
->verified_interp
&&
3566 !_mesa_hash_table_search(ctx
->verified_interp
, interp_param
)) {
3567 LLVMValueRef args
[2];
3569 args
[1] = LLVMConstInt(ctx
->ac
.i32
, S_NAN
| Q_NAN
| N_INFINITY
| P_INFINITY
, false);
3570 LLVMValueRef cond
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.class.f32", ctx
->ac
.i1
,
3571 args
, 2, AC_FUNC_ATTR_READNONE
);
3572 ac_build_kill_if_false(&ctx
->ac
, LLVMBuildNot(ctx
->ac
.builder
, cond
, ""));
3573 _mesa_hash_table_insert(ctx
->verified_interp
, interp_param
, interp_param
);
3576 LLVMValueRef values
[4];
3577 assert(bitsize
== 16 || bitsize
== 32);
3578 for (unsigned comp
= 0; comp
< num_components
; comp
++) {
3579 LLVMValueRef llvm_chan
= LLVMConstInt(ctx
->ac
.i32
, comp_start
+ comp
, false);
3580 if (bitsize
== 16) {
3581 values
[comp
] = ac_build_fs_interp_f16(&ctx
->ac
, llvm_chan
, attr_number
,
3582 ac_get_arg(&ctx
->ac
, ctx
->args
->prim_mask
), i
, j
);
3584 values
[comp
] = ac_build_fs_interp(&ctx
->ac
, llvm_chan
, attr_number
,
3585 ac_get_arg(&ctx
->ac
, ctx
->args
->prim_mask
), i
, j
);
3589 return ac_to_integer(&ctx
->ac
, ac_build_gather_values(&ctx
->ac
, values
, num_components
));
3592 static LLVMValueRef
load_input(struct ac_nir_context
*ctx
,
3593 nir_intrinsic_instr
*instr
)
3595 unsigned offset_idx
= instr
->intrinsic
== nir_intrinsic_load_input
? 0 : 1;
3597 /* We only lower inputs for fragment shaders ATM */
3598 ASSERTED nir_const_value
*offset
= nir_src_as_const_value(instr
->src
[offset_idx
]);
3600 assert(offset
[0].i32
== 0);
3602 unsigned component
= nir_intrinsic_component(instr
);
3603 unsigned index
= nir_intrinsic_base(instr
);
3604 unsigned vertex_id
= 2; /* P0 */
3606 if (instr
->intrinsic
== nir_intrinsic_load_input_vertex
) {
3607 nir_const_value
*src0
= nir_src_as_const_value(instr
->src
[0]);
3609 switch (src0
[0].i32
) {
3620 unreachable("Invalid vertex index");
3624 LLVMValueRef attr_number
= LLVMConstInt(ctx
->ac
.i32
, index
, false);
3625 LLVMValueRef values
[8];
3627 /* Each component of a 64-bit value takes up two GL-level channels. */
3628 unsigned num_components
= instr
->dest
.ssa
.num_components
;
3629 unsigned bit_size
= instr
->dest
.ssa
.bit_size
;
3631 bit_size
== 64 ? num_components
* 2 : num_components
;
3633 for (unsigned chan
= 0; chan
< channels
; chan
++) {
3634 if (component
+ chan
> 4)
3635 attr_number
= LLVMConstInt(ctx
->ac
.i32
, index
+ 1, false);
3636 LLVMValueRef llvm_chan
= LLVMConstInt(ctx
->ac
.i32
, (component
+ chan
) % 4, false);
3637 values
[chan
] = ac_build_fs_interp_mov(&ctx
->ac
,
3638 LLVMConstInt(ctx
->ac
.i32
, vertex_id
, false),
3641 ac_get_arg(&ctx
->ac
, ctx
->args
->prim_mask
));
3642 values
[chan
] = LLVMBuildBitCast(ctx
->ac
.builder
, values
[chan
], ctx
->ac
.i32
, "");
3643 values
[chan
] = LLVMBuildTruncOrBitCast(ctx
->ac
.builder
, values
[chan
],
3644 bit_size
== 16 ? ctx
->ac
.i16
: ctx
->ac
.i32
, "");
3647 LLVMValueRef result
= ac_build_gather_values(&ctx
->ac
, values
, channels
);
3648 if (bit_size
== 64) {
3649 LLVMTypeRef type
= num_components
== 1 ? ctx
->ac
.i64
:
3650 LLVMVectorType(ctx
->ac
.i64
, num_components
);
3651 result
= LLVMBuildBitCast(ctx
->ac
.builder
, result
, type
, "");
3656 static void visit_intrinsic(struct ac_nir_context
*ctx
,
3657 nir_intrinsic_instr
*instr
)
3659 LLVMValueRef result
= NULL
;
3661 switch (instr
->intrinsic
) {
3662 case nir_intrinsic_ballot
:
3663 result
= ac_build_ballot(&ctx
->ac
, get_src(ctx
, instr
->src
[0]));
3664 if (ctx
->ac
.ballot_mask_bits
> ctx
->ac
.wave_size
)
3665 result
= LLVMBuildZExt(ctx
->ac
.builder
, result
, ctx
->ac
.iN_ballotmask
, "");
3667 case nir_intrinsic_read_invocation
:
3668 result
= ac_build_readlane(&ctx
->ac
, get_src(ctx
, instr
->src
[0]),
3669 get_src(ctx
, instr
->src
[1]));
3671 case nir_intrinsic_read_first_invocation
:
3672 result
= ac_build_readlane(&ctx
->ac
, get_src(ctx
, instr
->src
[0]), NULL
);
3674 case nir_intrinsic_load_subgroup_invocation
:
3675 result
= ac_get_thread_id(&ctx
->ac
);
3677 case nir_intrinsic_load_work_group_id
: {
3678 LLVMValueRef values
[3];
3680 for (int i
= 0; i
< 3; i
++) {
3681 values
[i
] = ctx
->args
->workgroup_ids
[i
].used
?
3682 ac_get_arg(&ctx
->ac
, ctx
->args
->workgroup_ids
[i
]) : ctx
->ac
.i32_0
;
3685 result
= ac_build_gather_values(&ctx
->ac
, values
, 3);
3688 case nir_intrinsic_load_base_vertex
:
3689 case nir_intrinsic_load_first_vertex
:
3690 result
= ctx
->abi
->load_base_vertex(ctx
->abi
);
3692 case nir_intrinsic_load_local_group_size
:
3693 result
= ctx
->abi
->load_local_group_size(ctx
->abi
);
3695 case nir_intrinsic_load_vertex_id
:
3696 result
= LLVMBuildAdd(ctx
->ac
.builder
,
3697 ac_get_arg(&ctx
->ac
, ctx
->args
->vertex_id
),
3698 ac_get_arg(&ctx
->ac
, ctx
->args
->base_vertex
), "");
3700 case nir_intrinsic_load_vertex_id_zero_base
: {
3701 result
= ctx
->abi
->vertex_id
;
3704 case nir_intrinsic_load_local_invocation_id
: {
3705 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->local_invocation_ids
);
3708 case nir_intrinsic_load_base_instance
:
3709 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->start_instance
);
3711 case nir_intrinsic_load_draw_id
:
3712 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->draw_id
);
3714 case nir_intrinsic_load_view_index
:
3715 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->view_index
);
3717 case nir_intrinsic_load_invocation_id
:
3718 if (ctx
->stage
== MESA_SHADER_TESS_CTRL
) {
3719 result
= ac_unpack_param(&ctx
->ac
,
3720 ac_get_arg(&ctx
->ac
, ctx
->args
->tcs_rel_ids
),
3723 if (ctx
->ac
.chip_class
>= GFX10
) {
3724 result
= LLVMBuildAnd(ctx
->ac
.builder
,
3725 ac_get_arg(&ctx
->ac
, ctx
->args
->gs_invocation_id
),
3726 LLVMConstInt(ctx
->ac
.i32
, 127, 0), "");
3728 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->gs_invocation_id
);
3732 case nir_intrinsic_load_primitive_id
:
3733 if (ctx
->stage
== MESA_SHADER_GEOMETRY
) {
3734 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->gs_prim_id
);
3735 } else if (ctx
->stage
== MESA_SHADER_TESS_CTRL
) {
3736 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->tcs_patch_id
);
3737 } else if (ctx
->stage
== MESA_SHADER_TESS_EVAL
) {
3738 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->tes_patch_id
);
3740 fprintf(stderr
, "Unknown primitive id intrinsic: %d", ctx
->stage
);
3742 case nir_intrinsic_load_sample_id
:
3743 result
= ac_unpack_param(&ctx
->ac
,
3744 ac_get_arg(&ctx
->ac
, ctx
->args
->ancillary
),
3747 case nir_intrinsic_load_sample_pos
:
3748 result
= load_sample_pos(ctx
);
3750 case nir_intrinsic_load_sample_mask_in
:
3751 result
= ctx
->abi
->load_sample_mask_in(ctx
->abi
);
3753 case nir_intrinsic_load_frag_coord
: {
3754 LLVMValueRef values
[4] = {
3755 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[0]),
3756 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[1]),
3757 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[2]),
3758 ac_build_fdiv(&ctx
->ac
, ctx
->ac
.f32_1
,
3759 ac_get_arg(&ctx
->ac
, ctx
->args
->frag_pos
[3]))
3761 result
= ac_to_integer(&ctx
->ac
,
3762 ac_build_gather_values(&ctx
->ac
, values
, 4));
3765 case nir_intrinsic_load_layer_id
:
3766 result
= ctx
->abi
->inputs
[ac_llvm_reg_index_soa(VARYING_SLOT_LAYER
, 0)];
3768 case nir_intrinsic_load_front_face
:
3769 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->front_face
);
3771 case nir_intrinsic_load_helper_invocation
:
3772 result
= ac_build_load_helper_invocation(&ctx
->ac
);
3774 case nir_intrinsic_is_helper_invocation
:
3775 result
= ac_build_is_helper_invocation(&ctx
->ac
);
3777 case nir_intrinsic_load_color0
:
3778 result
= ctx
->abi
->color0
;
3780 case nir_intrinsic_load_color1
:
3781 result
= ctx
->abi
->color1
;
3783 case nir_intrinsic_load_user_data_amd
:
3784 assert(LLVMTypeOf(ctx
->abi
->user_data
) == ctx
->ac
.v4i32
);
3785 result
= ctx
->abi
->user_data
;
3787 case nir_intrinsic_load_instance_id
:
3788 result
= ctx
->abi
->instance_id
;
3790 case nir_intrinsic_load_num_work_groups
:
3791 result
= ac_get_arg(&ctx
->ac
, ctx
->args
->num_work_groups
);
3793 case nir_intrinsic_load_local_invocation_index
:
3794 result
= visit_load_local_invocation_index(ctx
);
3796 case nir_intrinsic_load_subgroup_id
:
3797 result
= visit_load_subgroup_id(ctx
);
3799 case nir_intrinsic_load_num_subgroups
:
3800 result
= visit_load_num_subgroups(ctx
);
3802 case nir_intrinsic_first_invocation
:
3803 result
= visit_first_invocation(ctx
);
3805 case nir_intrinsic_load_push_constant
:
3806 result
= visit_load_push_constant(ctx
, instr
);
3808 case nir_intrinsic_vulkan_resource_index
: {
3809 LLVMValueRef index
= get_src(ctx
, instr
->src
[0]);
3810 unsigned desc_set
= nir_intrinsic_desc_set(instr
);
3811 unsigned binding
= nir_intrinsic_binding(instr
);
3813 result
= ctx
->abi
->load_resource(ctx
->abi
, index
, desc_set
,
3817 case nir_intrinsic_vulkan_resource_reindex
:
3818 result
= visit_vulkan_resource_reindex(ctx
, instr
);
3820 case nir_intrinsic_store_ssbo
:
3821 visit_store_ssbo(ctx
, instr
);
3823 case nir_intrinsic_load_ssbo
:
3824 result
= visit_load_buffer(ctx
, instr
);
3826 case nir_intrinsic_ssbo_atomic_add
:
3827 case nir_intrinsic_ssbo_atomic_imin
:
3828 case nir_intrinsic_ssbo_atomic_umin
:
3829 case nir_intrinsic_ssbo_atomic_imax
:
3830 case nir_intrinsic_ssbo_atomic_umax
:
3831 case nir_intrinsic_ssbo_atomic_and
:
3832 case nir_intrinsic_ssbo_atomic_or
:
3833 case nir_intrinsic_ssbo_atomic_xor
:
3834 case nir_intrinsic_ssbo_atomic_exchange
:
3835 case nir_intrinsic_ssbo_atomic_comp_swap
:
3836 result
= visit_atomic_ssbo(ctx
, instr
);
3838 case nir_intrinsic_load_ubo
:
3839 result
= visit_load_ubo_buffer(ctx
, instr
);
3841 case nir_intrinsic_get_buffer_size
:
3842 result
= visit_get_buffer_size(ctx
, instr
);
3844 case nir_intrinsic_load_deref
:
3845 result
= visit_load_var(ctx
, instr
);
3847 case nir_intrinsic_store_deref
:
3848 visit_store_var(ctx
, instr
);
3850 case nir_intrinsic_load_shared
:
3851 result
= visit_load_shared(ctx
, instr
);
3853 case nir_intrinsic_store_shared
:
3854 visit_store_shared(ctx
, instr
);
3856 case nir_intrinsic_bindless_image_samples
:
3857 case nir_intrinsic_image_deref_samples
:
3858 result
= visit_image_samples(ctx
, instr
);
3860 case nir_intrinsic_bindless_image_load
:
3861 result
= visit_image_load(ctx
, instr
, true);
3863 case nir_intrinsic_image_deref_load
:
3864 result
= visit_image_load(ctx
, instr
, false);
3866 case nir_intrinsic_bindless_image_store
:
3867 visit_image_store(ctx
, instr
, true);
3869 case nir_intrinsic_image_deref_store
:
3870 visit_image_store(ctx
, instr
, false);
3872 case nir_intrinsic_bindless_image_atomic_add
:
3873 case nir_intrinsic_bindless_image_atomic_imin
:
3874 case nir_intrinsic_bindless_image_atomic_umin
:
3875 case nir_intrinsic_bindless_image_atomic_imax
:
3876 case nir_intrinsic_bindless_image_atomic_umax
:
3877 case nir_intrinsic_bindless_image_atomic_and
:
3878 case nir_intrinsic_bindless_image_atomic_or
:
3879 case nir_intrinsic_bindless_image_atomic_xor
:
3880 case nir_intrinsic_bindless_image_atomic_exchange
:
3881 case nir_intrinsic_bindless_image_atomic_comp_swap
:
3882 case nir_intrinsic_bindless_image_atomic_inc_wrap
:
3883 case nir_intrinsic_bindless_image_atomic_dec_wrap
:
3884 result
= visit_image_atomic(ctx
, instr
, true);
3886 case nir_intrinsic_image_deref_atomic_add
:
3887 case nir_intrinsic_image_deref_atomic_imin
:
3888 case nir_intrinsic_image_deref_atomic_umin
:
3889 case nir_intrinsic_image_deref_atomic_imax
:
3890 case nir_intrinsic_image_deref_atomic_umax
:
3891 case nir_intrinsic_image_deref_atomic_and
:
3892 case nir_intrinsic_image_deref_atomic_or
:
3893 case nir_intrinsic_image_deref_atomic_xor
:
3894 case nir_intrinsic_image_deref_atomic_exchange
:
3895 case nir_intrinsic_image_deref_atomic_comp_swap
:
3896 case nir_intrinsic_image_deref_atomic_inc_wrap
:
3897 case nir_intrinsic_image_deref_atomic_dec_wrap
:
3898 result
= visit_image_atomic(ctx
, instr
, false);
3900 case nir_intrinsic_bindless_image_size
:
3901 result
= visit_image_size(ctx
, instr
, true);
3903 case nir_intrinsic_image_deref_size
:
3904 result
= visit_image_size(ctx
, instr
, false);
3906 case nir_intrinsic_shader_clock
:
3907 result
= ac_build_shader_clock(&ctx
->ac
,
3908 nir_intrinsic_memory_scope(instr
));
3910 case nir_intrinsic_discard
:
3911 case nir_intrinsic_discard_if
:
3912 emit_discard(ctx
, instr
);
3914 case nir_intrinsic_demote
:
3915 case nir_intrinsic_demote_if
:
3916 emit_demote(ctx
, instr
);
3918 case nir_intrinsic_memory_barrier
:
3919 case nir_intrinsic_group_memory_barrier
:
3920 case nir_intrinsic_memory_barrier_buffer
:
3921 case nir_intrinsic_memory_barrier_image
:
3922 case nir_intrinsic_memory_barrier_shared
:
3923 emit_membar(&ctx
->ac
, instr
);
3925 case nir_intrinsic_memory_barrier_tcs_patch
:
3927 case nir_intrinsic_control_barrier
:
3928 ac_emit_barrier(&ctx
->ac
, ctx
->stage
);
3930 case nir_intrinsic_shared_atomic_add
:
3931 case nir_intrinsic_shared_atomic_imin
:
3932 case nir_intrinsic_shared_atomic_umin
:
3933 case nir_intrinsic_shared_atomic_imax
:
3934 case nir_intrinsic_shared_atomic_umax
:
3935 case nir_intrinsic_shared_atomic_and
:
3936 case nir_intrinsic_shared_atomic_or
:
3937 case nir_intrinsic_shared_atomic_xor
:
3938 case nir_intrinsic_shared_atomic_exchange
:
3939 case nir_intrinsic_shared_atomic_comp_swap
: {
3940 LLVMValueRef ptr
= get_memory_ptr(ctx
, instr
->src
[0],
3941 instr
->src
[1].ssa
->bit_size
);
3942 result
= visit_var_atomic(ctx
, instr
, ptr
, 1);
3945 case nir_intrinsic_deref_atomic_add
:
3946 case nir_intrinsic_deref_atomic_imin
:
3947 case nir_intrinsic_deref_atomic_umin
:
3948 case nir_intrinsic_deref_atomic_imax
:
3949 case nir_intrinsic_deref_atomic_umax
:
3950 case nir_intrinsic_deref_atomic_and
:
3951 case nir_intrinsic_deref_atomic_or
:
3952 case nir_intrinsic_deref_atomic_xor
:
3953 case nir_intrinsic_deref_atomic_exchange
:
3954 case nir_intrinsic_deref_atomic_comp_swap
: {
3955 LLVMValueRef ptr
= get_src(ctx
, instr
->src
[0]);
3956 result
= visit_var_atomic(ctx
, instr
, ptr
, 1);
3959 case nir_intrinsic_load_barycentric_pixel
:
3960 result
= barycentric_center(ctx
, nir_intrinsic_interp_mode(instr
));
3962 case nir_intrinsic_load_barycentric_centroid
:
3963 result
= barycentric_centroid(ctx
, nir_intrinsic_interp_mode(instr
));
3965 case nir_intrinsic_load_barycentric_sample
:
3966 result
= barycentric_sample(ctx
, nir_intrinsic_interp_mode(instr
));
3968 case nir_intrinsic_load_barycentric_model
:
3969 result
= barycentric_model(ctx
);
3971 case nir_intrinsic_load_barycentric_at_offset
: {
3972 LLVMValueRef offset
= ac_to_float(&ctx
->ac
, get_src(ctx
, instr
->src
[0]));
3973 result
= barycentric_offset(ctx
, nir_intrinsic_interp_mode(instr
), offset
);
3976 case nir_intrinsic_load_barycentric_at_sample
: {
3977 LLVMValueRef sample_id
= get_src(ctx
, instr
->src
[0]);
3978 result
= barycentric_at_sample(ctx
, nir_intrinsic_interp_mode(instr
), sample_id
);
3981 case nir_intrinsic_load_interpolated_input
: {
3982 /* We assume any indirect loads have been lowered away */
3983 ASSERTED nir_const_value
*offset
= nir_src_as_const_value(instr
->src
[1]);
3985 assert(offset
[0].i32
== 0);
3987 LLVMValueRef interp_param
= get_src(ctx
, instr
->src
[0]);
3988 unsigned index
= nir_intrinsic_base(instr
);
3989 unsigned component
= nir_intrinsic_component(instr
);
3990 result
= load_interpolated_input(ctx
, interp_param
, index
,
3992 instr
->dest
.ssa
.num_components
,
3993 instr
->dest
.ssa
.bit_size
);
3996 case nir_intrinsic_load_input
:
3997 case nir_intrinsic_load_input_vertex
:
3998 result
= load_input(ctx
, instr
);
4000 case nir_intrinsic_emit_vertex
:
4001 ctx
->abi
->emit_vertex(ctx
->abi
, nir_intrinsic_stream_id(instr
), ctx
->abi
->outputs
);
4003 case nir_intrinsic_emit_vertex_with_counter
: {
4004 unsigned stream
= nir_intrinsic_stream_id(instr
);
4005 LLVMValueRef next_vertex
= get_src(ctx
, instr
->src
[0]);
4006 ctx
->abi
->emit_vertex_with_counter(ctx
->abi
, stream
,
4011 case nir_intrinsic_end_primitive
:
4012 case nir_intrinsic_end_primitive_with_counter
:
4013 ctx
->abi
->emit_primitive(ctx
->abi
, nir_intrinsic_stream_id(instr
));
4015 case nir_intrinsic_load_tess_coord
:
4016 result
= ctx
->abi
->load_tess_coord(ctx
->abi
);
4018 case nir_intrinsic_load_tess_level_outer
:
4019 result
= ctx
->abi
->load_tess_level(ctx
->abi
, VARYING_SLOT_TESS_LEVEL_OUTER
, false);
4021 case nir_intrinsic_load_tess_level_inner
:
4022 result
= ctx
->abi
->load_tess_level(ctx
->abi
, VARYING_SLOT_TESS_LEVEL_INNER
, false);
4024 case nir_intrinsic_load_tess_level_outer_default
:
4025 result
= ctx
->abi
->load_tess_level(ctx
->abi
, VARYING_SLOT_TESS_LEVEL_OUTER
, true);
4027 case nir_intrinsic_load_tess_level_inner_default
:
4028 result
= ctx
->abi
->load_tess_level(ctx
->abi
, VARYING_SLOT_TESS_LEVEL_INNER
, true);
4030 case nir_intrinsic_load_patch_vertices_in
:
4031 result
= ctx
->abi
->load_patch_vertices_in(ctx
->abi
);
4033 case nir_intrinsic_vote_all
: {
4034 LLVMValueRef tmp
= ac_build_vote_all(&ctx
->ac
, get_src(ctx
, instr
->src
[0]));
4035 result
= LLVMBuildSExt(ctx
->ac
.builder
, tmp
, ctx
->ac
.i32
, "");
4038 case nir_intrinsic_vote_any
: {
4039 LLVMValueRef tmp
= ac_build_vote_any(&ctx
->ac
, get_src(ctx
, instr
->src
[0]));
4040 result
= LLVMBuildSExt(ctx
->ac
.builder
, tmp
, ctx
->ac
.i32
, "");
4043 case nir_intrinsic_shuffle
:
4044 if (ctx
->ac
.chip_class
== GFX8
||
4045 ctx
->ac
.chip_class
== GFX9
||
4046 (ctx
->ac
.chip_class
>= GFX10
&& ctx
->ac
.wave_size
== 32)) {
4047 result
= ac_build_shuffle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]),
4048 get_src(ctx
, instr
->src
[1]));
4050 LLVMValueRef src
= get_src(ctx
, instr
->src
[0]);
4051 LLVMValueRef index
= get_src(ctx
, instr
->src
[1]);
4052 LLVMTypeRef type
= LLVMTypeOf(src
);
4053 struct waterfall_context wctx
;
4054 LLVMValueRef index_val
;
4056 index_val
= enter_waterfall(ctx
, &wctx
, index
, true);
4058 src
= LLVMBuildZExt(ctx
->ac
.builder
, src
,
4061 result
= ac_build_intrinsic(&ctx
->ac
, "llvm.amdgcn.readlane",
4063 (LLVMValueRef
[]) { src
, index_val
}, 2,
4064 AC_FUNC_ATTR_READNONE
|
4065 AC_FUNC_ATTR_CONVERGENT
);
4067 result
= LLVMBuildTrunc(ctx
->ac
.builder
, result
, type
, "");
4069 result
= exit_waterfall(ctx
, &wctx
, result
);
4072 case nir_intrinsic_reduce
:
4073 result
= ac_build_reduce(&ctx
->ac
,
4074 get_src(ctx
, instr
->src
[0]),
4075 instr
->const_index
[0],
4076 instr
->const_index
[1]);
4078 case nir_intrinsic_inclusive_scan
:
4079 result
= ac_build_inclusive_scan(&ctx
->ac
,
4080 get_src(ctx
, instr
->src
[0]),
4081 instr
->const_index
[0]);
4083 case nir_intrinsic_exclusive_scan
:
4084 result
= ac_build_exclusive_scan(&ctx
->ac
,
4085 get_src(ctx
, instr
->src
[0]),
4086 instr
->const_index
[0]);
4088 case nir_intrinsic_quad_broadcast
: {
4089 unsigned lane
= nir_src_as_uint(instr
->src
[1]);
4090 result
= ac_build_quad_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]),
4091 lane
, lane
, lane
, lane
);
4094 case nir_intrinsic_quad_swap_horizontal
:
4095 result
= ac_build_quad_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]), 1, 0, 3 ,2);
4097 case nir_intrinsic_quad_swap_vertical
:
4098 result
= ac_build_quad_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]), 2, 3, 0 ,1);
4100 case nir_intrinsic_quad_swap_diagonal
:
4101 result
= ac_build_quad_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]), 3, 2, 1 ,0);
4103 case nir_intrinsic_quad_swizzle_amd
: {
4104 uint32_t mask
= nir_intrinsic_swizzle_mask(instr
);
4105 result
= ac_build_quad_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]),
4106 mask
& 0x3, (mask
>> 2) & 0x3,
4107 (mask
>> 4) & 0x3, (mask
>> 6) & 0x3);
4110 case nir_intrinsic_masked_swizzle_amd
: {
4111 uint32_t mask
= nir_intrinsic_swizzle_mask(instr
);
4112 result
= ac_build_ds_swizzle(&ctx
->ac
, get_src(ctx
, instr
->src
[0]), mask
);
4115 case nir_intrinsic_write_invocation_amd
:
4116 result
= ac_build_writelane(&ctx
->ac
, get_src(ctx
, instr
->src
[0]),
4117 get_src(ctx
, instr
->src
[1]),
4118 get_src(ctx
, instr
->src
[2]));
4120 case nir_intrinsic_mbcnt_amd
:
4121 result
= ac_build_mbcnt(&ctx
->ac
, get_src(ctx
, instr
->src
[0]));
4123 case nir_intrinsic_load_scratch
: {
4124 LLVMValueRef offset
= get_src(ctx
, instr
->src
[0]);
4125 LLVMValueRef ptr
= ac_build_gep0(&ctx
->ac
, ctx
->scratch
,
4127 LLVMTypeRef comp_type
=
4128 LLVMIntTypeInContext(ctx
->ac
.context
, instr
->dest
.ssa
.bit_size
);
4129 LLVMTypeRef vec_type
=
4130 instr
->dest
.ssa
.num_components
== 1 ? comp_type
:
4131 LLVMVectorType(comp_type
, instr
->dest
.ssa
.num_components
);
4132 unsigned addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
4133 ptr
= LLVMBuildBitCast(ctx
->ac
.builder
, ptr
,
4134 LLVMPointerType(vec_type
, addr_space
), "");
4135 result
= LLVMBuildLoad(ctx
->ac
.builder
, ptr
, "");
4138 case nir_intrinsic_store_scratch
: {
4139 LLVMValueRef offset
= get_src(ctx
, instr
->src
[1]);
4140 LLVMValueRef ptr
= ac_build_gep0(&ctx
->ac
, ctx
->scratch
,
4142 LLVMTypeRef comp_type
=
4143 LLVMIntTypeInContext(ctx
->ac
.context
, instr
->src
[0].ssa
->bit_size
);
4144 unsigned addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
4145 ptr
= LLVMBuildBitCast(ctx
->ac
.builder
, ptr
,
4146 LLVMPointerType(comp_type
, addr_space
), "");
4147 LLVMValueRef src
= get_src(ctx
, instr
->src
[0]);
4148 unsigned wrmask
= nir_intrinsic_write_mask(instr
);
4151 u_bit_scan_consecutive_range(&wrmask
, &start
, &count
);
4153 LLVMValueRef offset
= LLVMConstInt(ctx
->ac
.i32
, start
, false);
4154 LLVMValueRef offset_ptr
= LLVMBuildGEP(ctx
->ac
.builder
, ptr
, &offset
, 1, "");
4155 LLVMTypeRef vec_type
=
4156 count
== 1 ? comp_type
: LLVMVectorType(comp_type
, count
);
4157 offset_ptr
= LLVMBuildBitCast(ctx
->ac
.builder
,
4159 LLVMPointerType(vec_type
, addr_space
),
4161 LLVMValueRef offset_src
=
4162 ac_extract_components(&ctx
->ac
, src
, start
, count
);
4163 LLVMBuildStore(ctx
->ac
.builder
, offset_src
, offset_ptr
);
4167 case nir_intrinsic_load_constant
: {
4168 unsigned base
= nir_intrinsic_base(instr
);
4169 unsigned range
= nir_intrinsic_range(instr
);
4171 LLVMValueRef offset
= get_src(ctx
, instr
->src
[0]);
4172 offset
= LLVMBuildAdd(ctx
->ac
.builder
, offset
,
4173 LLVMConstInt(ctx
->ac
.i32
, base
, false), "");
4175 /* Clamp the offset to avoid out-of-bound access because global
4176 * instructions can't handle them.
4178 LLVMValueRef size
= LLVMConstInt(ctx
->ac
.i32
, base
+ range
, false);
4179 LLVMValueRef cond
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntULT
,
4181 offset
= LLVMBuildSelect(ctx
->ac
.builder
, cond
, offset
, size
, "");
4183 LLVMValueRef ptr
= ac_build_gep0(&ctx
->ac
, ctx
->constant_data
,
4185 LLVMTypeRef comp_type
=
4186 LLVMIntTypeInContext(ctx
->ac
.context
, instr
->dest
.ssa
.bit_size
);
4187 LLVMTypeRef vec_type
=
4188 instr
->dest
.ssa
.num_components
== 1 ? comp_type
:
4189 LLVMVectorType(comp_type
, instr
->dest
.ssa
.num_components
);
4190 unsigned addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
4191 ptr
= LLVMBuildBitCast(ctx
->ac
.builder
, ptr
,
4192 LLVMPointerType(vec_type
, addr_space
), "");
4193 result
= LLVMBuildLoad(ctx
->ac
.builder
, ptr
, "");
4197 fprintf(stderr
, "Unknown intrinsic: ");
4198 nir_print_instr(&instr
->instr
, stderr
);
4199 fprintf(stderr
, "\n");
4203 ctx
->ssa_defs
[instr
->dest
.ssa
.index
] = result
;
4207 static LLVMValueRef
get_bindless_index_from_uniform(struct ac_nir_context
*ctx
,
4208 unsigned base_index
,
4209 unsigned constant_index
,
4210 LLVMValueRef dynamic_index
)
4212 LLVMValueRef offset
= LLVMConstInt(ctx
->ac
.i32
, base_index
* 4, 0);
4213 LLVMValueRef index
= LLVMBuildAdd(ctx
->ac
.builder
, dynamic_index
,
4214 LLVMConstInt(ctx
->ac
.i32
, constant_index
, 0), "");
4216 /* Bindless uniforms are 64bit so multiple index by 8 */
4217 index
= LLVMBuildMul(ctx
->ac
.builder
, index
, LLVMConstInt(ctx
->ac
.i32
, 8, 0), "");
4218 offset
= LLVMBuildAdd(ctx
->ac
.builder
, offset
, index
, "");
4220 LLVMValueRef ubo_index
= ctx
->abi
->load_ubo(ctx
->abi
, ctx
->ac
.i32_0
);
4222 LLVMValueRef ret
= ac_build_buffer_load(&ctx
->ac
, ubo_index
, 1, NULL
, offset
,
4223 NULL
, 0, 0, true, true);
4225 return LLVMBuildBitCast(ctx
->ac
.builder
, ret
, ctx
->ac
.i32
, "");
4228 struct sampler_desc_address
{
4229 unsigned descriptor_set
;
4230 unsigned base_index
; /* binding in vulkan */
4231 unsigned constant_index
;
4232 LLVMValueRef dynamic_index
;
4237 static struct sampler_desc_address
4238 get_sampler_desc_internal(struct ac_nir_context
*ctx
,
4239 nir_deref_instr
*deref_instr
,
4240 const nir_instr
*instr
,
4243 LLVMValueRef index
= NULL
;
4244 unsigned constant_index
= 0;
4245 unsigned descriptor_set
;
4246 unsigned base_index
;
4247 bool bindless
= false;
4252 nir_intrinsic_instr
*img_instr
= nir_instr_as_intrinsic(instr
);
4255 index
= get_src(ctx
, img_instr
->src
[0]);
4257 nir_tex_instr
*tex_instr
= nir_instr_as_tex(instr
);
4258 int sampSrcIdx
= nir_tex_instr_src_index(tex_instr
,
4259 nir_tex_src_sampler_handle
);
4260 if (sampSrcIdx
!= -1) {
4263 index
= get_src(ctx
, tex_instr
->src
[sampSrcIdx
].src
);
4265 assert(tex_instr
&& !image
);
4266 base_index
= tex_instr
->sampler_index
;
4270 while(deref_instr
->deref_type
!= nir_deref_type_var
) {
4271 if (deref_instr
->deref_type
== nir_deref_type_array
) {
4272 unsigned array_size
= glsl_get_aoa_size(deref_instr
->type
);
4276 if (nir_src_is_const(deref_instr
->arr
.index
)) {
4277 constant_index
+= array_size
* nir_src_as_uint(deref_instr
->arr
.index
);
4279 LLVMValueRef indirect
= get_src(ctx
, deref_instr
->arr
.index
);
4281 indirect
= LLVMBuildMul(ctx
->ac
.builder
, indirect
,
4282 LLVMConstInt(ctx
->ac
.i32
, array_size
, false), "");
4287 index
= LLVMBuildAdd(ctx
->ac
.builder
, index
, indirect
, "");
4290 deref_instr
= nir_src_as_deref(deref_instr
->parent
);
4291 } else if (deref_instr
->deref_type
== nir_deref_type_struct
) {
4292 unsigned sidx
= deref_instr
->strct
.index
;
4293 deref_instr
= nir_src_as_deref(deref_instr
->parent
);
4294 constant_index
+= glsl_get_struct_location_offset(deref_instr
->type
, sidx
);
4296 unreachable("Unsupported deref type");
4299 descriptor_set
= deref_instr
->var
->data
.descriptor_set
;
4301 if (deref_instr
->var
->data
.bindless
) {
4302 /* For now just assert on unhandled variable types */
4303 assert(deref_instr
->var
->data
.mode
== nir_var_uniform
);
4305 base_index
= deref_instr
->var
->data
.driver_location
;
4308 index
= index
? index
: ctx
->ac
.i32_0
;
4309 index
= get_bindless_index_from_uniform(ctx
, base_index
,
4310 constant_index
, index
);
4312 base_index
= deref_instr
->var
->data
.binding
;
4314 return (struct sampler_desc_address
) {
4315 .descriptor_set
= descriptor_set
,
4316 .base_index
= base_index
,
4317 .constant_index
= constant_index
,
4318 .dynamic_index
= index
,
4320 .bindless
= bindless
,
4324 /* Extract any possibly divergent index into a separate value that can be fed
4325 * into get_sampler_desc with the same arguments. */
4326 static LLVMValueRef
get_sampler_desc_index(struct ac_nir_context
*ctx
,
4327 nir_deref_instr
*deref_instr
,
4328 const nir_instr
*instr
,
4331 struct sampler_desc_address addr
= get_sampler_desc_internal(ctx
, deref_instr
, instr
, image
);
4332 return addr
.dynamic_index
;
4335 static LLVMValueRef
get_sampler_desc(struct ac_nir_context
*ctx
,
4336 nir_deref_instr
*deref_instr
,
4337 enum ac_descriptor_type desc_type
,
4338 const nir_instr
*instr
,
4340 bool image
, bool write
)
4342 struct sampler_desc_address addr
= get_sampler_desc_internal(ctx
, deref_instr
, instr
, image
);
4343 return ctx
->abi
->load_sampler_desc(ctx
->abi
,
4344 addr
.descriptor_set
,
4346 addr
.constant_index
, index
,
4347 desc_type
, addr
.image
, write
, addr
.bindless
);
4350 /* Disable anisotropic filtering if BASE_LEVEL == LAST_LEVEL.
4353 * If BASE_LEVEL == LAST_LEVEL, the shader must disable anisotropic
4354 * filtering manually. The driver sets img7 to a mask clearing
4355 * MAX_ANISO_RATIO if BASE_LEVEL == LAST_LEVEL. The shader must do:
4356 * s_and_b32 samp0, samp0, img7
4359 * The ANISO_OVERRIDE sampler field enables this fix in TA.
4361 static LLVMValueRef
sici_fix_sampler_aniso(struct ac_nir_context
*ctx
,
4362 LLVMValueRef res
, LLVMValueRef samp
)
4364 LLVMBuilderRef builder
= ctx
->ac
.builder
;
4365 LLVMValueRef img7
, samp0
;
4367 if (ctx
->ac
.chip_class
>= GFX8
)
4370 img7
= LLVMBuildExtractElement(builder
, res
,
4371 LLVMConstInt(ctx
->ac
.i32
, 7, 0), "");
4372 samp0
= LLVMBuildExtractElement(builder
, samp
,
4373 LLVMConstInt(ctx
->ac
.i32
, 0, 0), "");
4374 samp0
= LLVMBuildAnd(builder
, samp0
, img7
, "");
4375 return LLVMBuildInsertElement(builder
, samp
, samp0
,
4376 LLVMConstInt(ctx
->ac
.i32
, 0, 0), "");
4379 static void tex_fetch_ptrs(struct ac_nir_context
*ctx
,
4380 nir_tex_instr
*instr
,
4381 struct waterfall_context
*wctx
,
4382 LLVMValueRef
*res_ptr
, LLVMValueRef
*samp_ptr
,
4383 LLVMValueRef
*fmask_ptr
)
4385 nir_deref_instr
*texture_deref_instr
= NULL
;
4386 nir_deref_instr
*sampler_deref_instr
= NULL
;
4389 for (unsigned i
= 0; i
< instr
->num_srcs
; i
++) {
4390 switch (instr
->src
[i
].src_type
) {
4391 case nir_tex_src_texture_deref
:
4392 texture_deref_instr
= nir_src_as_deref(instr
->src
[i
].src
);
4394 case nir_tex_src_sampler_deref
:
4395 sampler_deref_instr
= nir_src_as_deref(instr
->src
[i
].src
);
4397 case nir_tex_src_plane
:
4398 plane
= nir_src_as_int(instr
->src
[i
].src
);
4405 LLVMValueRef texture_dynamic_index
= get_sampler_desc_index(ctx
, texture_deref_instr
,
4406 &instr
->instr
, false);
4407 if (!sampler_deref_instr
)
4408 sampler_deref_instr
= texture_deref_instr
;
4410 LLVMValueRef sampler_dynamic_index
= get_sampler_desc_index(ctx
, sampler_deref_instr
,
4411 &instr
->instr
, false);
4412 if (instr
->texture_non_uniform
)
4413 texture_dynamic_index
= enter_waterfall(ctx
, wctx
+ 0, texture_dynamic_index
, true);
4415 if (instr
->sampler_non_uniform
)
4416 sampler_dynamic_index
= enter_waterfall(ctx
, wctx
+ 1, sampler_dynamic_index
, true);
4418 enum ac_descriptor_type main_descriptor
= instr
->sampler_dim
== GLSL_SAMPLER_DIM_BUF
? AC_DESC_BUFFER
: AC_DESC_IMAGE
;
4421 assert(instr
->op
!= nir_texop_txf_ms
&&
4422 instr
->op
!= nir_texop_samples_identical
);
4423 assert(instr
->sampler_dim
!= GLSL_SAMPLER_DIM_BUF
);
4425 main_descriptor
= AC_DESC_PLANE_0
+ plane
;
4428 if (instr
->op
== nir_texop_fragment_mask_fetch
) {
4429 /* The fragment mask is fetched from the compressed
4430 * multisampled surface.
4432 main_descriptor
= AC_DESC_FMASK
;
4435 *res_ptr
= get_sampler_desc(ctx
, texture_deref_instr
, main_descriptor
, &instr
->instr
,
4436 texture_dynamic_index
, false, false);
4439 *samp_ptr
= get_sampler_desc(ctx
, sampler_deref_instr
, AC_DESC_SAMPLER
, &instr
->instr
,
4440 sampler_dynamic_index
, false, false);
4441 if (instr
->sampler_dim
< GLSL_SAMPLER_DIM_RECT
)
4442 *samp_ptr
= sici_fix_sampler_aniso(ctx
, *res_ptr
, *samp_ptr
);
4444 if (fmask_ptr
&& (instr
->op
== nir_texop_txf_ms
||
4445 instr
->op
== nir_texop_samples_identical
))
4446 *fmask_ptr
= get_sampler_desc(ctx
, texture_deref_instr
, AC_DESC_FMASK
,
4447 &instr
->instr
, texture_dynamic_index
, false, false);
4450 static LLVMValueRef
apply_round_slice(struct ac_llvm_context
*ctx
,
4453 coord
= ac_to_float(ctx
, coord
);
4454 coord
= ac_build_round(ctx
, coord
);
4455 coord
= ac_to_integer(ctx
, coord
);
4459 static void visit_tex(struct ac_nir_context
*ctx
, nir_tex_instr
*instr
)
4461 LLVMValueRef result
= NULL
;
4462 struct ac_image_args args
= { 0 };
4463 LLVMValueRef fmask_ptr
= NULL
, sample_index
= NULL
;
4464 LLVMValueRef ddx
= NULL
, ddy
= NULL
;
4465 unsigned offset_src
= 0;
4466 struct waterfall_context wctx
[2] = {{{0}}};
4468 tex_fetch_ptrs(ctx
, instr
, wctx
, &args
.resource
, &args
.sampler
, &fmask_ptr
);
4470 for (unsigned i
= 0; i
< instr
->num_srcs
; i
++) {
4471 switch (instr
->src
[i
].src_type
) {
4472 case nir_tex_src_coord
: {
4473 LLVMValueRef coord
= get_src(ctx
, instr
->src
[i
].src
);
4474 for (unsigned chan
= 0; chan
< instr
->coord_components
; ++chan
)
4475 args
.coords
[chan
] = ac_llvm_extract_elem(&ctx
->ac
, coord
, chan
);
4478 case nir_tex_src_projector
:
4480 case nir_tex_src_comparator
:
4481 if (instr
->is_shadow
) {
4482 args
.compare
= get_src(ctx
, instr
->src
[i
].src
);
4483 args
.compare
= ac_to_float(&ctx
->ac
, args
.compare
);
4486 case nir_tex_src_offset
:
4487 args
.offset
= get_src(ctx
, instr
->src
[i
].src
);
4490 case nir_tex_src_bias
:
4491 args
.bias
= get_src(ctx
, instr
->src
[i
].src
);
4493 case nir_tex_src_lod
: {
4494 if (nir_src_is_const(instr
->src
[i
].src
) && nir_src_as_uint(instr
->src
[i
].src
) == 0)
4495 args
.level_zero
= true;
4497 args
.lod
= get_src(ctx
, instr
->src
[i
].src
);
4500 case nir_tex_src_ms_index
:
4501 sample_index
= get_src(ctx
, instr
->src
[i
].src
);
4503 case nir_tex_src_ms_mcs
:
4505 case nir_tex_src_ddx
:
4506 ddx
= get_src(ctx
, instr
->src
[i
].src
);
4508 case nir_tex_src_ddy
:
4509 ddy
= get_src(ctx
, instr
->src
[i
].src
);
4511 case nir_tex_src_min_lod
:
4512 args
.min_lod
= get_src(ctx
, instr
->src
[i
].src
);
4514 case nir_tex_src_texture_offset
:
4515 case nir_tex_src_sampler_offset
:
4516 case nir_tex_src_plane
:
4522 if (instr
->op
== nir_texop_txs
&& instr
->sampler_dim
== GLSL_SAMPLER_DIM_BUF
) {
4523 result
= get_buffer_size(ctx
, args
.resource
, true);
4527 if (instr
->op
== nir_texop_texture_samples
) {
4528 LLVMValueRef res
, samples
, is_msaa
;
4529 LLVMValueRef default_sample
;
4531 res
= LLVMBuildBitCast(ctx
->ac
.builder
, args
.resource
, ctx
->ac
.v8i32
, "");
4532 samples
= LLVMBuildExtractElement(ctx
->ac
.builder
, res
,
4533 LLVMConstInt(ctx
->ac
.i32
, 3, false), "");
4534 is_msaa
= LLVMBuildLShr(ctx
->ac
.builder
, samples
,
4535 LLVMConstInt(ctx
->ac
.i32
, 28, false), "");
4536 is_msaa
= LLVMBuildAnd(ctx
->ac
.builder
, is_msaa
,
4537 LLVMConstInt(ctx
->ac
.i32
, 0xe, false), "");
4538 is_msaa
= LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntEQ
, is_msaa
,
4539 LLVMConstInt(ctx
->ac
.i32
, 0xe, false), "");
4541 samples
= LLVMBuildLShr(ctx
->ac
.builder
, samples
,
4542 LLVMConstInt(ctx
->ac
.i32
, 16, false), "");
4543 samples
= LLVMBuildAnd(ctx
->ac
.builder
, samples
,
4544 LLVMConstInt(ctx
->ac
.i32
, 0xf, false), "");
4545 samples
= LLVMBuildShl(ctx
->ac
.builder
, ctx
->ac
.i32_1
,
4548 if (ctx
->abi
->robust_buffer_access
) {
4549 LLVMValueRef dword1
, is_null_descriptor
;
4551 /* Extract the second dword of the descriptor, if it's
4552 * all zero, then it's a null descriptor.
4554 dword1
= LLVMBuildExtractElement(ctx
->ac
.builder
, res
,
4555 LLVMConstInt(ctx
->ac
.i32
, 1, false), "");
4556 is_null_descriptor
=
4557 LLVMBuildICmp(ctx
->ac
.builder
, LLVMIntEQ
, dword1
,
4558 LLVMConstInt(ctx
->ac
.i32
, 0, false), "");
4560 LLVMBuildSelect(ctx
->ac
.builder
, is_null_descriptor
,
4561 ctx
->ac
.i32_0
, ctx
->ac
.i32_1
, "");
4563 default_sample
= ctx
->ac
.i32_1
;
4566 samples
= LLVMBuildSelect(ctx
->ac
.builder
, is_msaa
, samples
,
4567 default_sample
, "");
4572 if (args
.offset
&& instr
->op
!= nir_texop_txf
&& instr
->op
!= nir_texop_txf_ms
) {
4573 LLVMValueRef offset
[3], pack
;
4574 for (unsigned chan
= 0; chan
< 3; ++chan
)
4575 offset
[chan
] = ctx
->ac
.i32_0
;
4577 unsigned num_components
= ac_get_llvm_num_components(args
.offset
);
4578 for (unsigned chan
= 0; chan
< num_components
; chan
++) {
4579 offset
[chan
] = ac_llvm_extract_elem(&ctx
->ac
, args
.offset
, chan
);
4580 offset
[chan
] = LLVMBuildAnd(ctx
->ac
.builder
, offset
[chan
],
4581 LLVMConstInt(ctx
->ac
.i32
, 0x3f, false), "");
4583 offset
[chan
] = LLVMBuildShl(ctx
->ac
.builder
, offset
[chan
],
4584 LLVMConstInt(ctx
->ac
.i32
, chan
* 8, false), "");
4586 pack
= LLVMBuildOr(ctx
->ac
.builder
, offset
[0], offset
[1], "");
4587 pack
= LLVMBuildOr(ctx
->ac
.builder
, pack
, offset
[2], "");
4591 /* Section 8.23.1 (Depth Texture Comparison Mode) of the
4592 * OpenGL 4.5 spec says:
4594 * "If the texture’s internal format indicates a fixed-point
4595 * depth texture, then D_t and D_ref are clamped to the
4596 * range [0, 1]; otherwise no clamping is performed."
4598 * TC-compatible HTILE promotes Z16 and Z24 to Z32_FLOAT,
4599 * so the depth comparison value isn't clamped for Z16 and
4600 * Z24 anymore. Do it manually here for GFX8-9; GFX10 has
4601 * an explicitly clamped 32-bit float format.
4604 ctx
->ac
.chip_class
>= GFX8
&&
4605 ctx
->ac
.chip_class
<= GFX9
&&
4606 ctx
->abi
->clamp_shadow_reference
) {
4607 LLVMValueRef upgraded
, clamped
;
4609 upgraded
= LLVMBuildExtractElement(ctx
->ac
.builder
, args
.sampler
,
4610 LLVMConstInt(ctx
->ac
.i32
, 3, false), "");
4611 upgraded
= LLVMBuildLShr(ctx
->ac
.builder
, upgraded
,
4612 LLVMConstInt(ctx
->ac
.i32
, 29, false), "");
4613 upgraded
= LLVMBuildTrunc(ctx
->ac
.builder
, upgraded
, ctx
->ac
.i1
, "");
4614 clamped
= ac_build_clamp(&ctx
->ac
, args
.compare
);
4615 args
.compare
= LLVMBuildSelect(ctx
->ac
.builder
, upgraded
, clamped
,
4619 /* pack derivatives */
4621 int num_src_deriv_channels
, num_dest_deriv_channels
;
4622 switch (instr
->sampler_dim
) {
4623 case GLSL_SAMPLER_DIM_3D
:
4624 case GLSL_SAMPLER_DIM_CUBE
:
4625 num_src_deriv_channels
= 3;
4626 num_dest_deriv_channels
= 3;
4628 case GLSL_SAMPLER_DIM_2D
:
4630 num_src_deriv_channels
= 2;
4631 num_dest_deriv_channels
= 2;
4633 case GLSL_SAMPLER_DIM_1D
:
4634 num_src_deriv_channels
= 1;
4635 if (ctx
->ac
.chip_class
== GFX9
) {
4636 num_dest_deriv_channels
= 2;
4638 num_dest_deriv_channels
= 1;
4643 for (unsigned i
= 0; i
< num_src_deriv_channels
; i
++) {
4644 args
.derivs
[i
] = ac_to_float(&ctx
->ac
,
4645 ac_llvm_extract_elem(&ctx
->ac
, ddx
, i
));
4646 args
.derivs
[num_dest_deriv_channels
+ i
] = ac_to_float(&ctx
->ac
,
4647 ac_llvm_extract_elem(&ctx
->ac
, ddy
, i
));
4649 for (unsigned i
= num_src_deriv_channels
; i
< num_dest_deriv_channels
; i
++) {
4650 args
.derivs
[i
] = ctx
->ac
.f32_0
;
4651 args
.derivs
[num_dest_deriv_channels
+ i
] = ctx
->ac
.f32_0
;
4655 if (instr
->sampler_dim
== GLSL_SAMPLER_DIM_CUBE
&& args
.coords
[0]) {
4656 for (unsigned chan
= 0; chan
< instr
->coord_components
; chan
++)
4657 args
.coords
[chan
] = ac_to_float(&ctx
->ac
, args
.coords
[chan
]);
4658 if (instr
->coord_components
== 3)
4659 args
.coords
[3] = LLVMGetUndef(ctx
->ac
.f32
);
4660 ac_prepare_cube_coords(&ctx
->ac
,
4661 instr
->op
== nir_texop_txd
, instr
->is_array
,
4662 instr
->op
== nir_texop_lod
, args
.coords
, args
.derivs
);
4665 /* Texture coordinates fixups */
4666 if (instr
->coord_components
> 1 &&
4667 instr
->sampler_dim
== GLSL_SAMPLER_DIM_1D
&&
4669 instr
->op
!= nir_texop_txf
) {
4670 args
.coords
[1] = apply_round_slice(&ctx
->ac
, args
.coords
[1]);
4673 if (instr
->coord_components
> 2 &&
4674 (instr
->sampler_dim
== GLSL_SAMPLER_DIM_2D
||
4675 instr
->sampler_dim
== GLSL_SAMPLER_DIM_MS
||
4676 instr
->sampler_dim
== GLSL_SAMPLER_DIM_SUBPASS
||
4677 instr
->sampler_dim
== GLSL_SAMPLER_DIM_SUBPASS_MS
) &&
4679 instr
->op
!= nir_texop_txf
&&
4680 instr
->op
!= nir_texop_txf_ms
&&
4681 instr
->op
!= nir_texop_fragment_fetch
&&
4682 instr
->op
!= nir_texop_fragment_mask_fetch
) {
4683 args
.coords
[2] = apply_round_slice(&ctx
->ac
, args
.coords
[2]);
4686 if (ctx
->ac
.chip_class
== GFX9
&&
4687 instr
->sampler_dim
== GLSL_SAMPLER_DIM_1D
&&
4688 instr
->op
!= nir_texop_lod
) {
4689 LLVMValueRef filler
;
4690 if (instr
->op
== nir_texop_txf
)
4691 filler
= ctx
->ac
.i32_0
;
4693 filler
= LLVMConstReal(ctx
->ac
.f32
, 0.5);
4695 if (instr
->is_array
)
4696 args
.coords
[2] = args
.coords
[1];
4697 args
.coords
[1] = filler
;
4700 /* Pack sample index */
4701 if (sample_index
&& (instr
->op
== nir_texop_txf_ms
||
4702 instr
->op
== nir_texop_fragment_fetch
))
4703 args
.coords
[instr
->coord_components
] = sample_index
;
4705 if (instr
->op
== nir_texop_samples_identical
) {
4706 struct ac_image_args txf_args
= { 0 };
4707 memcpy(txf_args
.coords
, args
.coords
, sizeof(txf_args
.coords
));
4709 txf_args
.dmask
= 0xf;
4710 txf_args
.resource
= fmask_ptr
;
4711 txf_args
.dim
= instr
->is_array
? ac_image_2darray
: ac_image_2d
;
4712 result
= build_tex_intrinsic(ctx
, instr
, &txf_args
);
4714 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, ctx
->ac
.i32_0
, "");
4715 result
= emit_int_cmp(&ctx
->ac
, LLVMIntEQ
, result
, ctx
->ac
.i32_0
);
4719 if ((instr
->sampler_dim
== GLSL_SAMPLER_DIM_SUBPASS_MS
||
4720 instr
->sampler_dim
== GLSL_SAMPLER_DIM_MS
) &&
4721 instr
->op
!= nir_texop_txs
&&
4722 instr
->op
!= nir_texop_fragment_fetch
&&
4723 instr
->op
!= nir_texop_fragment_mask_fetch
) {
4724 unsigned sample_chan
= instr
->is_array
? 3 : 2;
4725 args
.coords
[sample_chan
] = adjust_sample_index_using_fmask(
4726 &ctx
->ac
, args
.coords
[0], args
.coords
[1],
4727 instr
->is_array
? args
.coords
[2] : NULL
,
4728 args
.coords
[sample_chan
], fmask_ptr
);
4731 if (args
.offset
&& (instr
->op
== nir_texop_txf
|| instr
->op
== nir_texop_txf_ms
)) {
4732 int num_offsets
= instr
->src
[offset_src
].src
.ssa
->num_components
;
4733 num_offsets
= MIN2(num_offsets
, instr
->coord_components
);
4734 for (unsigned i
= 0; i
< num_offsets
; ++i
) {
4735 args
.coords
[i
] = LLVMBuildAdd(
4736 ctx
->ac
.builder
, args
.coords
[i
],
4737 LLVMConstInt(ctx
->ac
.i32
, nir_src_comp_as_uint(instr
->src
[offset_src
].src
, i
), false), "");
4742 /* DMASK was repurposed for GATHER4. 4 components are always
4743 * returned and DMASK works like a swizzle - it selects
4744 * the component to fetch. The only valid DMASK values are
4745 * 1=red, 2=green, 4=blue, 8=alpha. (e.g. 1 returns
4746 * (red,red,red,red) etc.) The ISA document doesn't mention
4750 if (instr
->op
== nir_texop_tg4
) {
4751 if (instr
->is_shadow
)
4754 args
.dmask
= 1 << instr
->component
;
4757 if (instr
->sampler_dim
!= GLSL_SAMPLER_DIM_BUF
) {
4758 args
.dim
= ac_get_sampler_dim(ctx
->ac
.chip_class
, instr
->sampler_dim
, instr
->is_array
);
4759 args
.unorm
= instr
->sampler_dim
== GLSL_SAMPLER_DIM_RECT
;
4762 /* Adjust the number of coordinates because we only need (x,y) for 2D
4763 * multisampled images and (x,y,layer) for 2D multisampled layered
4764 * images or for multisampled input attachments.
4766 if (instr
->op
== nir_texop_fragment_mask_fetch
) {
4767 if (args
.dim
== ac_image_2dmsaa
) {
4768 args
.dim
= ac_image_2d
;
4770 assert(args
.dim
== ac_image_2darraymsaa
);
4771 args
.dim
= ac_image_2darray
;
4775 assert(instr
->dest
.is_ssa
);
4776 args
.d16
= instr
->dest
.ssa
.bit_size
== 16;
4778 result
= build_tex_intrinsic(ctx
, instr
, &args
);
4780 if (instr
->op
== nir_texop_query_levels
)
4781 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, LLVMConstInt(ctx
->ac
.i32
, 3, false), "");
4782 else if (instr
->is_shadow
&& instr
->is_new_style_shadow
&&
4783 instr
->op
!= nir_texop_txs
&& instr
->op
!= nir_texop_lod
&&
4784 instr
->op
!= nir_texop_tg4
)
4785 result
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, ctx
->ac
.i32_0
, "");
4786 else if (instr
->op
== nir_texop_txs
&&
4787 instr
->sampler_dim
== GLSL_SAMPLER_DIM_CUBE
&&
4789 LLVMValueRef two
= LLVMConstInt(ctx
->ac
.i32
, 2, false);
4790 LLVMValueRef six
= LLVMConstInt(ctx
->ac
.i32
, 6, false);
4791 LLVMValueRef z
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, two
, "");
4792 z
= LLVMBuildSDiv(ctx
->ac
.builder
, z
, six
, "");
4793 result
= LLVMBuildInsertElement(ctx
->ac
.builder
, result
, z
, two
, "");
4794 } else if (ctx
->ac
.chip_class
== GFX9
&&
4795 instr
->op
== nir_texop_txs
&&
4796 instr
->sampler_dim
== GLSL_SAMPLER_DIM_1D
&&
4798 LLVMValueRef two
= LLVMConstInt(ctx
->ac
.i32
, 2, false);
4799 LLVMValueRef layers
= LLVMBuildExtractElement(ctx
->ac
.builder
, result
, two
, "");
4800 result
= LLVMBuildInsertElement(ctx
->ac
.builder
, result
, layers
,
4802 } else if (instr
->dest
.ssa
.num_components
!= 4)
4803 result
= ac_trim_vector(&ctx
->ac
, result
, instr
->dest
.ssa
.num_components
);
4807 assert(instr
->dest
.is_ssa
);
4808 result
= ac_to_integer(&ctx
->ac
, result
);
4810 for (int i
= ARRAY_SIZE(wctx
); --i
>= 0;) {
4811 result
= exit_waterfall(ctx
, wctx
+ i
, result
);
4814 ctx
->ssa_defs
[instr
->dest
.ssa
.index
] = result
;
4818 static void visit_phi(struct ac_nir_context
*ctx
, nir_phi_instr
*instr
)
4820 LLVMTypeRef type
= get_def_type(ctx
, &instr
->dest
.ssa
);
4821 LLVMValueRef result
= LLVMBuildPhi(ctx
->ac
.builder
, type
, "");
4823 ctx
->ssa_defs
[instr
->dest
.ssa
.index
] = result
;
4824 _mesa_hash_table_insert(ctx
->phis
, instr
, result
);
4827 static void visit_post_phi(struct ac_nir_context
*ctx
,
4828 nir_phi_instr
*instr
,
4829 LLVMValueRef llvm_phi
)
4831 nir_foreach_phi_src(src
, instr
) {
4832 LLVMBasicBlockRef block
= get_block(ctx
, src
->pred
);
4833 LLVMValueRef llvm_src
= get_src(ctx
, src
->src
);
4835 LLVMAddIncoming(llvm_phi
, &llvm_src
, &block
, 1);
4839 static void phi_post_pass(struct ac_nir_context
*ctx
)
4841 hash_table_foreach(ctx
->phis
, entry
) {
4842 visit_post_phi(ctx
, (nir_phi_instr
*)entry
->key
,
4843 (LLVMValueRef
)entry
->data
);
4848 static bool is_def_used_in_an_export(const nir_ssa_def
* def
) {
4849 nir_foreach_use(use_src
, def
) {
4850 if (use_src
->parent_instr
->type
== nir_instr_type_intrinsic
) {
4851 nir_intrinsic_instr
*instr
= nir_instr_as_intrinsic(use_src
->parent_instr
);
4852 if (instr
->intrinsic
== nir_intrinsic_store_deref
)
4854 } else if (use_src
->parent_instr
->type
== nir_instr_type_alu
) {
4855 nir_alu_instr
*instr
= nir_instr_as_alu(use_src
->parent_instr
);
4856 if (instr
->op
== nir_op_vec4
&&
4857 is_def_used_in_an_export(&instr
->dest
.dest
.ssa
)) {
4865 static void visit_ssa_undef(struct ac_nir_context
*ctx
,
4866 const nir_ssa_undef_instr
*instr
)
4868 unsigned num_components
= instr
->def
.num_components
;
4869 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->ac
.context
, instr
->def
.bit_size
);
4871 if (!ctx
->abi
->convert_undef_to_zero
|| is_def_used_in_an_export(&instr
->def
)) {
4874 if (num_components
== 1)
4875 undef
= LLVMGetUndef(type
);
4877 undef
= LLVMGetUndef(LLVMVectorType(type
, num_components
));
4879 ctx
->ssa_defs
[instr
->def
.index
] = undef
;
4881 LLVMValueRef zero
= LLVMConstInt(type
, 0, false);
4882 if (num_components
> 1) {
4883 zero
= ac_build_gather_values_extended(
4884 &ctx
->ac
, &zero
, 4, 0, false, false);
4886 ctx
->ssa_defs
[instr
->def
.index
] = zero
;
4890 static void visit_jump(struct ac_llvm_context
*ctx
,
4891 const nir_jump_instr
*instr
)
4893 switch (instr
->type
) {
4894 case nir_jump_break
:
4895 ac_build_break(ctx
);
4897 case nir_jump_continue
:
4898 ac_build_continue(ctx
);
4901 fprintf(stderr
, "Unknown NIR jump instr: ");
4902 nir_print_instr(&instr
->instr
, stderr
);
4903 fprintf(stderr
, "\n");
4909 glsl_base_to_llvm_type(struct ac_llvm_context
*ac
,
4910 enum glsl_base_type type
)
4914 case GLSL_TYPE_UINT
:
4915 case GLSL_TYPE_BOOL
:
4916 case GLSL_TYPE_SUBROUTINE
:
4918 case GLSL_TYPE_INT8
:
4919 case GLSL_TYPE_UINT8
:
4921 case GLSL_TYPE_INT16
:
4922 case GLSL_TYPE_UINT16
:
4924 case GLSL_TYPE_FLOAT
:
4926 case GLSL_TYPE_FLOAT16
:
4928 case GLSL_TYPE_INT64
:
4929 case GLSL_TYPE_UINT64
:
4931 case GLSL_TYPE_DOUBLE
:
4934 unreachable("unknown GLSL type");
4939 glsl_to_llvm_type(struct ac_llvm_context
*ac
,
4940 const struct glsl_type
*type
)
4942 if (glsl_type_is_scalar(type
)) {
4943 return glsl_base_to_llvm_type(ac
, glsl_get_base_type(type
));
4946 if (glsl_type_is_vector(type
)) {
4947 return LLVMVectorType(
4948 glsl_base_to_llvm_type(ac
, glsl_get_base_type(type
)),
4949 glsl_get_vector_elements(type
));
4952 if (glsl_type_is_matrix(type
)) {
4953 return LLVMArrayType(
4954 glsl_to_llvm_type(ac
, glsl_get_column_type(type
)),
4955 glsl_get_matrix_columns(type
));
4958 if (glsl_type_is_array(type
)) {
4959 return LLVMArrayType(
4960 glsl_to_llvm_type(ac
, glsl_get_array_element(type
)),
4961 glsl_get_length(type
));
4964 assert(glsl_type_is_struct_or_ifc(type
));
4966 LLVMTypeRef member_types
[glsl_get_length(type
)];
4968 for (unsigned i
= 0; i
< glsl_get_length(type
); i
++) {
4970 glsl_to_llvm_type(ac
,
4971 glsl_get_struct_field(type
, i
));
4974 return LLVMStructTypeInContext(ac
->context
, member_types
,
4975 glsl_get_length(type
), false);
4978 static void visit_deref(struct ac_nir_context
*ctx
,
4979 nir_deref_instr
*instr
)
4981 if (instr
->mode
!= nir_var_mem_shared
&&
4982 instr
->mode
!= nir_var_mem_global
)
4985 LLVMValueRef result
= NULL
;
4986 switch(instr
->deref_type
) {
4987 case nir_deref_type_var
: {
4988 struct hash_entry
*entry
= _mesa_hash_table_search(ctx
->vars
, instr
->var
);
4989 result
= entry
->data
;
4992 case nir_deref_type_struct
:
4993 if (instr
->mode
== nir_var_mem_global
) {
4994 nir_deref_instr
*parent
= nir_deref_instr_parent(instr
);
4995 uint64_t offset
= glsl_get_struct_field_offset(parent
->type
,
4996 instr
->strct
.index
);
4997 result
= ac_build_gep_ptr(&ctx
->ac
, get_src(ctx
, instr
->parent
),
4998 LLVMConstInt(ctx
->ac
.i32
, offset
, 0));
5000 result
= ac_build_gep0(&ctx
->ac
, get_src(ctx
, instr
->parent
),
5001 LLVMConstInt(ctx
->ac
.i32
, instr
->strct
.index
, 0));
5004 case nir_deref_type_array
:
5005 if (instr
->mode
== nir_var_mem_global
) {
5006 nir_deref_instr
*parent
= nir_deref_instr_parent(instr
);
5007 unsigned stride
= glsl_get_explicit_stride(parent
->type
);
5009 if ((glsl_type_is_matrix(parent
->type
) &&
5010 glsl_matrix_type_is_row_major(parent
->type
)) ||
5011 (glsl_type_is_vector(parent
->type
) && stride
== 0))
5012 stride
= type_scalar_size_bytes(parent
->type
);
5015 LLVMValueRef index
= get_src(ctx
, instr
->arr
.index
);
5016 if (LLVMTypeOf(index
) != ctx
->ac
.i64
)
5017 index
= LLVMBuildZExt(ctx
->ac
.builder
, index
, ctx
->ac
.i64
, "");
5019 LLVMValueRef offset
= LLVMBuildMul(ctx
->ac
.builder
, index
, LLVMConstInt(ctx
->ac
.i64
, stride
, 0), "");
5021 result
= ac_build_gep_ptr(&ctx
->ac
, get_src(ctx
, instr
->parent
), offset
);
5023 result
= ac_build_gep0(&ctx
->ac
, get_src(ctx
, instr
->parent
),
5024 get_src(ctx
, instr
->arr
.index
));
5027 case nir_deref_type_ptr_as_array
:
5028 if (instr
->mode
== nir_var_mem_global
) {
5029 unsigned stride
= nir_deref_instr_ptr_as_array_stride(instr
);
5031 LLVMValueRef index
= get_src(ctx
, instr
->arr
.index
);
5032 if (LLVMTypeOf(index
) != ctx
->ac
.i64
)
5033 index
= LLVMBuildZExt(ctx
->ac
.builder
, index
, ctx
->ac
.i64
, "");
5035 LLVMValueRef offset
= LLVMBuildMul(ctx
->ac
.builder
, index
, LLVMConstInt(ctx
->ac
.i64
, stride
, 0), "");
5037 result
= ac_build_gep_ptr(&ctx
->ac
, get_src(ctx
, instr
->parent
), offset
);
5039 result
= ac_build_gep_ptr(&ctx
->ac
, get_src(ctx
, instr
->parent
),
5040 get_src(ctx
, instr
->arr
.index
));
5043 case nir_deref_type_cast
: {
5044 result
= get_src(ctx
, instr
->parent
);
5046 /* We can't use the structs from LLVM because the shader
5047 * specifies its own offsets. */
5048 LLVMTypeRef pointee_type
= ctx
->ac
.i8
;
5049 if (instr
->mode
== nir_var_mem_shared
)
5050 pointee_type
= glsl_to_llvm_type(&ctx
->ac
, instr
->type
);
5052 unsigned address_space
;
5054 switch(instr
->mode
) {
5055 case nir_var_mem_shared
:
5056 address_space
= AC_ADDR_SPACE_LDS
;
5058 case nir_var_mem_global
:
5059 address_space
= AC_ADDR_SPACE_GLOBAL
;
5062 unreachable("Unhandled address space");
5065 LLVMTypeRef type
= LLVMPointerType(pointee_type
, address_space
);
5067 if (LLVMTypeOf(result
) != type
) {
5068 if (LLVMGetTypeKind(LLVMTypeOf(result
)) == LLVMVectorTypeKind
) {
5069 result
= LLVMBuildBitCast(ctx
->ac
.builder
, result
,
5072 result
= LLVMBuildIntToPtr(ctx
->ac
.builder
, result
,
5079 unreachable("Unhandled deref_instr deref type");
5082 ctx
->ssa_defs
[instr
->dest
.ssa
.index
] = result
;
5085 static void visit_cf_list(struct ac_nir_context
*ctx
,
5086 struct exec_list
*list
);
5088 static void visit_block(struct ac_nir_context
*ctx
, nir_block
*block
)
5090 nir_foreach_instr(instr
, block
)
5092 switch (instr
->type
) {
5093 case nir_instr_type_alu
:
5094 visit_alu(ctx
, nir_instr_as_alu(instr
));
5096 case nir_instr_type_load_const
:
5097 visit_load_const(ctx
, nir_instr_as_load_const(instr
));
5099 case nir_instr_type_intrinsic
:
5100 visit_intrinsic(ctx
, nir_instr_as_intrinsic(instr
));
5102 case nir_instr_type_tex
:
5103 visit_tex(ctx
, nir_instr_as_tex(instr
));
5105 case nir_instr_type_phi
:
5106 visit_phi(ctx
, nir_instr_as_phi(instr
));
5108 case nir_instr_type_ssa_undef
:
5109 visit_ssa_undef(ctx
, nir_instr_as_ssa_undef(instr
));
5111 case nir_instr_type_jump
:
5112 visit_jump(&ctx
->ac
, nir_instr_as_jump(instr
));
5114 case nir_instr_type_deref
:
5115 visit_deref(ctx
, nir_instr_as_deref(instr
));
5118 fprintf(stderr
, "Unknown NIR instr type: ");
5119 nir_print_instr(instr
, stderr
);
5120 fprintf(stderr
, "\n");
5125 _mesa_hash_table_insert(ctx
->defs
, block
,
5126 LLVMGetInsertBlock(ctx
->ac
.builder
));
5129 static void visit_if(struct ac_nir_context
*ctx
, nir_if
*if_stmt
)
5131 LLVMValueRef value
= get_src(ctx
, if_stmt
->condition
);
5133 nir_block
*then_block
=
5134 (nir_block
*) exec_list_get_head(&if_stmt
->then_list
);
5136 ac_build_uif(&ctx
->ac
, value
, then_block
->index
);
5138 visit_cf_list(ctx
, &if_stmt
->then_list
);
5140 if (!exec_list_is_empty(&if_stmt
->else_list
)) {
5141 nir_block
*else_block
=
5142 (nir_block
*) exec_list_get_head(&if_stmt
->else_list
);
5144 ac_build_else(&ctx
->ac
, else_block
->index
);
5145 visit_cf_list(ctx
, &if_stmt
->else_list
);
5148 ac_build_endif(&ctx
->ac
, then_block
->index
);
5151 static void visit_loop(struct ac_nir_context
*ctx
, nir_loop
*loop
)
5153 nir_block
*first_loop_block
=
5154 (nir_block
*) exec_list_get_head(&loop
->body
);
5156 ac_build_bgnloop(&ctx
->ac
, first_loop_block
->index
);
5158 visit_cf_list(ctx
, &loop
->body
);
5160 ac_build_endloop(&ctx
->ac
, first_loop_block
->index
);
5163 static void visit_cf_list(struct ac_nir_context
*ctx
,
5164 struct exec_list
*list
)
5166 foreach_list_typed(nir_cf_node
, node
, node
, list
)
5168 switch (node
->type
) {
5169 case nir_cf_node_block
:
5170 visit_block(ctx
, nir_cf_node_as_block(node
));
5173 case nir_cf_node_if
:
5174 visit_if(ctx
, nir_cf_node_as_if(node
));
5177 case nir_cf_node_loop
:
5178 visit_loop(ctx
, nir_cf_node_as_loop(node
));
5188 ac_handle_shader_output_decl(struct ac_llvm_context
*ctx
,
5189 struct ac_shader_abi
*abi
,
5190 struct nir_shader
*nir
,
5191 struct nir_variable
*variable
,
5192 gl_shader_stage stage
)
5194 unsigned output_loc
= variable
->data
.driver_location
/ 4;
5195 unsigned attrib_count
= glsl_count_attribute_slots(variable
->type
, false);
5197 /* tess ctrl has it's own load/store paths for outputs */
5198 if (stage
== MESA_SHADER_TESS_CTRL
)
5201 if (stage
== MESA_SHADER_VERTEX
||
5202 stage
== MESA_SHADER_TESS_EVAL
||
5203 stage
== MESA_SHADER_GEOMETRY
) {
5204 int idx
= variable
->data
.location
+ variable
->data
.index
;
5205 if (idx
== VARYING_SLOT_CLIP_DIST0
) {
5206 int length
= nir
->info
.clip_distance_array_size
+
5207 nir
->info
.cull_distance_array_size
;
5216 bool is_16bit
= glsl_type_is_16bit(glsl_without_array(variable
->type
));
5217 LLVMTypeRef type
= is_16bit
? ctx
->f16
: ctx
->f32
;
5218 for (unsigned i
= 0; i
< attrib_count
; ++i
) {
5219 for (unsigned chan
= 0; chan
< 4; chan
++) {
5220 abi
->outputs
[ac_llvm_reg_index_soa(output_loc
+ i
, chan
)] =
5221 ac_build_alloca_undef(ctx
, type
, "");
5227 setup_locals(struct ac_nir_context
*ctx
,
5228 struct nir_function
*func
)
5231 ctx
->num_locals
= 0;
5232 nir_foreach_variable(variable
, &func
->impl
->locals
) {
5233 unsigned attrib_count
= glsl_count_attribute_slots(variable
->type
, false);
5234 variable
->data
.driver_location
= ctx
->num_locals
* 4;
5235 variable
->data
.location_frac
= 0;
5236 ctx
->num_locals
+= attrib_count
;
5238 ctx
->locals
= malloc(4 * ctx
->num_locals
* sizeof(LLVMValueRef
));
5242 for (i
= 0; i
< ctx
->num_locals
; i
++) {
5243 for (j
= 0; j
< 4; j
++) {
5244 ctx
->locals
[i
* 4 + j
] =
5245 ac_build_alloca_undef(&ctx
->ac
, ctx
->ac
.f32
, "temp");
5251 setup_scratch(struct ac_nir_context
*ctx
,
5252 struct nir_shader
*shader
)
5254 if (shader
->scratch_size
== 0)
5257 ctx
->scratch
= ac_build_alloca_undef(&ctx
->ac
,
5258 LLVMArrayType(ctx
->ac
.i8
, shader
->scratch_size
),
5263 setup_constant_data(struct ac_nir_context
*ctx
,
5264 struct nir_shader
*shader
)
5266 if (!shader
->constant_data
)
5270 LLVMConstStringInContext(ctx
->ac
.context
,
5271 shader
->constant_data
,
5272 shader
->constant_data_size
,
5274 LLVMTypeRef type
= LLVMArrayType(ctx
->ac
.i8
, shader
->constant_data_size
);
5276 /* We want to put the constant data in the CONST address space so that
5277 * we can use scalar loads. However, LLVM versions before 10 put these
5278 * variables in the same section as the code, which is unacceptable
5279 * for RadeonSI as it needs to relocate all the data sections after
5280 * the code sections. See https://reviews.llvm.org/D65813.
5282 unsigned address_space
=
5283 LLVM_VERSION_MAJOR
< 10 ? AC_ADDR_SPACE_GLOBAL
: AC_ADDR_SPACE_CONST
;
5285 LLVMValueRef global
=
5286 LLVMAddGlobalInAddressSpace(ctx
->ac
.module
, type
,
5290 LLVMSetInitializer(global
, data
);
5291 LLVMSetGlobalConstant(global
, true);
5292 LLVMSetVisibility(global
, LLVMHiddenVisibility
);
5293 ctx
->constant_data
= global
;
5297 setup_shared(struct ac_nir_context
*ctx
,
5298 struct nir_shader
*nir
)
5303 LLVMTypeRef type
= LLVMArrayType(ctx
->ac
.i8
,
5304 nir
->info
.cs
.shared_size
);
5307 LLVMAddGlobalInAddressSpace(ctx
->ac
.module
, type
,
5310 LLVMSetAlignment(lds
, 64 * 1024);
5312 ctx
->ac
.lds
= LLVMBuildBitCast(ctx
->ac
.builder
, lds
,
5313 LLVMPointerType(ctx
->ac
.i8
,
5314 AC_ADDR_SPACE_LDS
), "");
5317 void ac_nir_translate(struct ac_llvm_context
*ac
, struct ac_shader_abi
*abi
,
5318 const struct ac_shader_args
*args
, struct nir_shader
*nir
)
5320 struct ac_nir_context ctx
= {};
5321 struct nir_function
*func
;
5327 ctx
.stage
= nir
->info
.stage
;
5328 ctx
.info
= &nir
->info
;
5330 ctx
.main_function
= LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx
.ac
.builder
));
5332 nir_foreach_variable(variable
, &nir
->outputs
)
5333 ac_handle_shader_output_decl(&ctx
.ac
, ctx
.abi
, nir
, variable
,
5336 ctx
.defs
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
5337 _mesa_key_pointer_equal
);
5338 ctx
.phis
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
5339 _mesa_key_pointer_equal
);
5340 ctx
.vars
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
5341 _mesa_key_pointer_equal
);
5343 if (ctx
.abi
->kill_ps_if_inf_interp
)
5344 ctx
.verified_interp
= _mesa_hash_table_create(NULL
, _mesa_hash_pointer
,
5345 _mesa_key_pointer_equal
);
5347 func
= (struct nir_function
*)exec_list_get_head(&nir
->functions
);
5349 nir_index_ssa_defs(func
->impl
);
5350 ctx
.ssa_defs
= calloc(func
->impl
->ssa_alloc
, sizeof(LLVMValueRef
));
5352 setup_locals(&ctx
, func
);
5353 setup_scratch(&ctx
, nir
);
5354 setup_constant_data(&ctx
, nir
);
5356 if (gl_shader_stage_is_compute(nir
->info
.stage
))
5357 setup_shared(&ctx
, nir
);
5359 if (nir
->info
.stage
== MESA_SHADER_FRAGMENT
&& nir
->info
.fs
.uses_demote
) {
5360 ctx
.ac
.postponed_kill
= ac_build_alloca_undef(&ctx
.ac
, ac
->i1
, "");
5361 /* true = don't kill. */
5362 LLVMBuildStore(ctx
.ac
.builder
, ctx
.ac
.i1true
, ctx
.ac
.postponed_kill
);
5365 visit_cf_list(&ctx
, &func
->impl
->body
);
5366 phi_post_pass(&ctx
);
5368 if (ctx
.ac
.postponed_kill
)
5369 ac_build_kill_if_false(&ctx
.ac
, LLVMBuildLoad(ctx
.ac
.builder
,
5370 ctx
.ac
.postponed_kill
, ""));
5372 if (!gl_shader_stage_is_compute(nir
->info
.stage
))
5373 ctx
.abi
->emit_outputs(ctx
.abi
, AC_LLVM_MAX_OUTPUTS
,
5378 ralloc_free(ctx
.defs
);
5379 ralloc_free(ctx
.phis
);
5380 ralloc_free(ctx
.vars
);
5381 if (ctx
.abi
->kill_ps_if_inf_interp
)
5382 ralloc_free(ctx
.verified_interp
);
5386 ac_lower_indirect_derefs(struct nir_shader
*nir
, enum chip_class chip_class
)
5388 bool progress
= false;
5390 /* Lower large variables to scratch first so that we won't bloat the
5391 * shader by generating large if ladders for them. We later lower
5392 * scratch to alloca's, assuming LLVM won't generate VGPR indexing.
5394 NIR_PASS(progress
, nir
, nir_lower_vars_to_scratch
,
5395 nir_var_function_temp
,
5397 glsl_get_natural_size_align_bytes
);
5399 /* While it would be nice not to have this flag, we are constrained
5400 * by the reality that LLVM 9.0 has buggy VGPR indexing on GFX9.
5402 bool llvm_has_working_vgpr_indexing
= chip_class
!= GFX9
;
5404 /* TODO: Indirect indexing of GS inputs is unimplemented.
5406 * TCS and TES load inputs directly from LDS or offchip memory, so
5407 * indirect indexing is trivial.
5409 nir_variable_mode indirect_mask
= 0;
5410 if (nir
->info
.stage
== MESA_SHADER_GEOMETRY
||
5411 (nir
->info
.stage
!= MESA_SHADER_TESS_CTRL
&&
5412 nir
->info
.stage
!= MESA_SHADER_TESS_EVAL
&&
5413 !llvm_has_working_vgpr_indexing
)) {
5414 indirect_mask
|= nir_var_shader_in
;
5416 if (!llvm_has_working_vgpr_indexing
&&
5417 nir
->info
.stage
!= MESA_SHADER_TESS_CTRL
)
5418 indirect_mask
|= nir_var_shader_out
;
5420 /* TODO: We shouldn't need to do this, however LLVM isn't currently
5421 * smart enough to handle indirects without causing excess spilling
5422 * causing the gpu to hang.
5424 * See the following thread for more details of the problem:
5425 * https://lists.freedesktop.org/archives/mesa-dev/2017-July/162106.html
5427 indirect_mask
|= nir_var_function_temp
;
5429 progress
|= nir_lower_indirect_derefs(nir
, indirect_mask
);
5434 get_inst_tessfactor_writemask(nir_intrinsic_instr
*intrin
)
5436 if (intrin
->intrinsic
!= nir_intrinsic_store_deref
)
5440 nir_deref_instr_get_variable(nir_src_as_deref(intrin
->src
[0]));
5442 if (var
->data
.mode
!= nir_var_shader_out
)
5445 unsigned writemask
= 0;
5446 const int location
= var
->data
.location
;
5447 unsigned first_component
= var
->data
.location_frac
;
5448 unsigned num_comps
= intrin
->dest
.ssa
.num_components
;
5450 if (location
== VARYING_SLOT_TESS_LEVEL_INNER
)
5451 writemask
= ((1 << (num_comps
+ 1)) - 1) << first_component
;
5452 else if (location
== VARYING_SLOT_TESS_LEVEL_OUTER
)
5453 writemask
= (((1 << (num_comps
+ 1)) - 1) << first_component
) << 4;
5459 scan_tess_ctrl(nir_cf_node
*cf_node
, unsigned *upper_block_tf_writemask
,
5460 unsigned *cond_block_tf_writemask
,
5461 bool *tessfactors_are_def_in_all_invocs
, bool is_nested_cf
)
5463 switch (cf_node
->type
) {
5464 case nir_cf_node_block
: {
5465 nir_block
*block
= nir_cf_node_as_block(cf_node
);
5466 nir_foreach_instr(instr
, block
) {
5467 if (instr
->type
!= nir_instr_type_intrinsic
)
5470 nir_intrinsic_instr
*intrin
= nir_instr_as_intrinsic(instr
);
5471 if (intrin
->intrinsic
== nir_intrinsic_control_barrier
) {
5473 /* If we find a barrier in nested control flow put this in the
5474 * too hard basket. In GLSL this is not possible but it is in
5478 *tessfactors_are_def_in_all_invocs
= false;
5482 /* The following case must be prevented:
5483 * gl_TessLevelInner = ...;
5485 * if (gl_InvocationID == 1)
5486 * gl_TessLevelInner = ...;
5488 * If you consider disjoint code segments separated by barriers, each
5489 * such segment that writes tess factor channels should write the same
5490 * channels in all codepaths within that segment.
5492 if (upper_block_tf_writemask
|| cond_block_tf_writemask
) {
5493 /* Accumulate the result: */
5494 *tessfactors_are_def_in_all_invocs
&=
5495 !(*cond_block_tf_writemask
& ~(*upper_block_tf_writemask
));
5497 /* Analyze the next code segment from scratch. */
5498 *upper_block_tf_writemask
= 0;
5499 *cond_block_tf_writemask
= 0;
5502 *upper_block_tf_writemask
|= get_inst_tessfactor_writemask(intrin
);
5507 case nir_cf_node_if
: {
5508 unsigned then_tessfactor_writemask
= 0;
5509 unsigned else_tessfactor_writemask
= 0;
5511 nir_if
*if_stmt
= nir_cf_node_as_if(cf_node
);
5512 foreach_list_typed(nir_cf_node
, nested_node
, node
, &if_stmt
->then_list
) {
5513 scan_tess_ctrl(nested_node
, &then_tessfactor_writemask
,
5514 cond_block_tf_writemask
,
5515 tessfactors_are_def_in_all_invocs
, true);
5518 foreach_list_typed(nir_cf_node
, nested_node
, node
, &if_stmt
->else_list
) {
5519 scan_tess_ctrl(nested_node
, &else_tessfactor_writemask
,
5520 cond_block_tf_writemask
,
5521 tessfactors_are_def_in_all_invocs
, true);
5524 if (then_tessfactor_writemask
|| else_tessfactor_writemask
) {
5525 /* If both statements write the same tess factor channels,
5526 * we can say that the upper block writes them too.
5528 *upper_block_tf_writemask
|= then_tessfactor_writemask
&
5529 else_tessfactor_writemask
;
5530 *cond_block_tf_writemask
|= then_tessfactor_writemask
|
5531 else_tessfactor_writemask
;
5536 case nir_cf_node_loop
: {
5537 nir_loop
*loop
= nir_cf_node_as_loop(cf_node
);
5538 foreach_list_typed(nir_cf_node
, nested_node
, node
, &loop
->body
) {
5539 scan_tess_ctrl(nested_node
, cond_block_tf_writemask
,
5540 cond_block_tf_writemask
,
5541 tessfactors_are_def_in_all_invocs
, true);
5547 unreachable("unknown cf node type");
5552 ac_are_tessfactors_def_in_all_invocs(const struct nir_shader
*nir
)
5554 assert(nir
->info
.stage
== MESA_SHADER_TESS_CTRL
);
5556 /* The pass works as follows:
5557 * If all codepaths write tess factors, we can say that all
5558 * invocations define tess factors.
5560 * Each tess factor channel is tracked separately.
5562 unsigned main_block_tf_writemask
= 0; /* if main block writes tess factors */
5563 unsigned cond_block_tf_writemask
= 0; /* if cond block writes tess factors */
5565 /* Initial value = true. Here the pass will accumulate results from
5566 * multiple segments surrounded by barriers. If tess factors aren't
5567 * written at all, it's a shader bug and we don't care if this will be
5570 bool tessfactors_are_def_in_all_invocs
= true;
5572 nir_foreach_function(function
, nir
) {
5573 if (function
->impl
) {
5574 foreach_list_typed(nir_cf_node
, node
, node
, &function
->impl
->body
) {
5575 scan_tess_ctrl(node
, &main_block_tf_writemask
,
5576 &cond_block_tf_writemask
,
5577 &tessfactors_are_def_in_all_invocs
,
5583 /* Accumulate the result for the last code segment separated by a
5586 if (main_block_tf_writemask
|| cond_block_tf_writemask
) {
5587 tessfactors_are_def_in_all_invocs
&=
5588 !(cond_block_tf_writemask
& ~main_block_tf_writemask
);
5591 return tessfactors_are_def_in_all_invocs
;