2 * Copyright 2014 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
25 /* based on pieces from si_pipe.c and radeon_llvm_emit.c */
26 #include "ac_llvm_build.h"
28 #include <llvm-c/Core.h>
29 #include <llvm/Config/llvm-config.h>
31 #include "c11/threads.h"
36 #include "ac_llvm_util.h"
37 #include "ac_shader_util.h"
38 #include "ac_exp_param.h"
39 #include "util/bitscan.h"
40 #include "util/macros.h"
41 #include "util/u_atomic.h"
42 #include "util/u_math.h"
45 #include "shader_enums.h"
47 #define AC_LLVM_INITIAL_CF_DEPTH 4
49 /* Data for if/else/endif and bgnloop/endloop control flow structures.
52 /* Loop exit or next part of if/else/endif. */
53 LLVMBasicBlockRef next_block
;
54 LLVMBasicBlockRef loop_entry_block
;
57 /* Initialize module-independent parts of the context.
59 * The caller is responsible for initializing ctx::module and ctx::builder.
62 ac_llvm_context_init(struct ac_llvm_context
*ctx
,
63 struct ac_llvm_compiler
*compiler
,
64 enum chip_class chip_class
, enum radeon_family family
,
65 enum ac_float_mode float_mode
, unsigned wave_size
,
66 unsigned ballot_mask_bits
)
68 ctx
->context
= LLVMContextCreate();
70 ctx
->chip_class
= chip_class
;
72 ctx
->wave_size
= wave_size
;
73 ctx
->ballot_mask_bits
= ballot_mask_bits
;
74 ctx
->float_mode
= float_mode
;
75 ctx
->module
= ac_create_module(wave_size
== 32 ? compiler
->tm_wave32
78 ctx
->builder
= ac_create_builder(ctx
->context
, float_mode
);
80 ctx
->voidt
= LLVMVoidTypeInContext(ctx
->context
);
81 ctx
->i1
= LLVMInt1TypeInContext(ctx
->context
);
82 ctx
->i8
= LLVMInt8TypeInContext(ctx
->context
);
83 ctx
->i16
= LLVMIntTypeInContext(ctx
->context
, 16);
84 ctx
->i32
= LLVMIntTypeInContext(ctx
->context
, 32);
85 ctx
->i64
= LLVMIntTypeInContext(ctx
->context
, 64);
86 ctx
->i128
= LLVMIntTypeInContext(ctx
->context
, 128);
87 ctx
->intptr
= ctx
->i32
;
88 ctx
->f16
= LLVMHalfTypeInContext(ctx
->context
);
89 ctx
->f32
= LLVMFloatTypeInContext(ctx
->context
);
90 ctx
->f64
= LLVMDoubleTypeInContext(ctx
->context
);
91 ctx
->v2i16
= LLVMVectorType(ctx
->i16
, 2);
92 ctx
->v4i16
= LLVMVectorType(ctx
->i16
, 4);
93 ctx
->v2f16
= LLVMVectorType(ctx
->f16
, 2);
94 ctx
->v4f16
= LLVMVectorType(ctx
->f16
, 4);
95 ctx
->v2i32
= LLVMVectorType(ctx
->i32
, 2);
96 ctx
->v3i32
= LLVMVectorType(ctx
->i32
, 3);
97 ctx
->v4i32
= LLVMVectorType(ctx
->i32
, 4);
98 ctx
->v2f32
= LLVMVectorType(ctx
->f32
, 2);
99 ctx
->v3f32
= LLVMVectorType(ctx
->f32
, 3);
100 ctx
->v4f32
= LLVMVectorType(ctx
->f32
, 4);
101 ctx
->v8i32
= LLVMVectorType(ctx
->i32
, 8);
102 ctx
->iN_wavemask
= LLVMIntTypeInContext(ctx
->context
, ctx
->wave_size
);
103 ctx
->iN_ballotmask
= LLVMIntTypeInContext(ctx
->context
, ballot_mask_bits
);
105 ctx
->i8_0
= LLVMConstInt(ctx
->i8
, 0, false);
106 ctx
->i8_1
= LLVMConstInt(ctx
->i8
, 1, false);
107 ctx
->i16_0
= LLVMConstInt(ctx
->i16
, 0, false);
108 ctx
->i16_1
= LLVMConstInt(ctx
->i16
, 1, false);
109 ctx
->i32_0
= LLVMConstInt(ctx
->i32
, 0, false);
110 ctx
->i32_1
= LLVMConstInt(ctx
->i32
, 1, false);
111 ctx
->i64_0
= LLVMConstInt(ctx
->i64
, 0, false);
112 ctx
->i64_1
= LLVMConstInt(ctx
->i64
, 1, false);
113 ctx
->i128_0
= LLVMConstInt(ctx
->i128
, 0, false);
114 ctx
->i128_1
= LLVMConstInt(ctx
->i128
, 1, false);
115 ctx
->f16_0
= LLVMConstReal(ctx
->f16
, 0.0);
116 ctx
->f16_1
= LLVMConstReal(ctx
->f16
, 1.0);
117 ctx
->f32_0
= LLVMConstReal(ctx
->f32
, 0.0);
118 ctx
->f32_1
= LLVMConstReal(ctx
->f32
, 1.0);
119 ctx
->f64_0
= LLVMConstReal(ctx
->f64
, 0.0);
120 ctx
->f64_1
= LLVMConstReal(ctx
->f64
, 1.0);
122 ctx
->i1false
= LLVMConstInt(ctx
->i1
, 0, false);
123 ctx
->i1true
= LLVMConstInt(ctx
->i1
, 1, false);
125 ctx
->range_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
128 ctx
->invariant_load_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
129 "invariant.load", 14);
131 ctx
->uniform_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
132 "amdgpu.uniform", 14);
134 ctx
->empty_md
= LLVMMDNodeInContext(ctx
->context
, NULL
, 0);
135 ctx
->flow
= calloc(1, sizeof(*ctx
->flow
));
139 ac_llvm_context_dispose(struct ac_llvm_context
*ctx
)
141 free(ctx
->flow
->stack
);
147 ac_get_llvm_num_components(LLVMValueRef value
)
149 LLVMTypeRef type
= LLVMTypeOf(value
);
150 unsigned num_components
= LLVMGetTypeKind(type
) == LLVMVectorTypeKind
151 ? LLVMGetVectorSize(type
)
153 return num_components
;
157 ac_llvm_extract_elem(struct ac_llvm_context
*ac
,
161 if (LLVMGetTypeKind(LLVMTypeOf(value
)) != LLVMVectorTypeKind
) {
166 return LLVMBuildExtractElement(ac
->builder
, value
,
167 LLVMConstInt(ac
->i32
, index
, false), "");
171 ac_get_elem_bits(struct ac_llvm_context
*ctx
, LLVMTypeRef type
)
173 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
)
174 type
= LLVMGetElementType(type
);
176 if (LLVMGetTypeKind(type
) == LLVMIntegerTypeKind
)
177 return LLVMGetIntTypeWidth(type
);
179 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
180 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_LDS
)
184 if (type
== ctx
->f16
)
186 if (type
== ctx
->f32
)
188 if (type
== ctx
->f64
)
191 unreachable("Unhandled type kind in get_elem_bits");
195 ac_get_type_size(LLVMTypeRef type
)
197 LLVMTypeKind kind
= LLVMGetTypeKind(type
);
200 case LLVMIntegerTypeKind
:
201 return LLVMGetIntTypeWidth(type
) / 8;
202 case LLVMHalfTypeKind
:
204 case LLVMFloatTypeKind
:
206 case LLVMDoubleTypeKind
:
208 case LLVMPointerTypeKind
:
209 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_CONST_32BIT
)
212 case LLVMVectorTypeKind
:
213 return LLVMGetVectorSize(type
) *
214 ac_get_type_size(LLVMGetElementType(type
));
215 case LLVMArrayTypeKind
:
216 return LLVMGetArrayLength(type
) *
217 ac_get_type_size(LLVMGetElementType(type
));
224 static LLVMTypeRef
to_integer_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
228 else if (t
== ctx
->f16
|| t
== ctx
->i16
)
230 else if (t
== ctx
->f32
|| t
== ctx
->i32
)
232 else if (t
== ctx
->f64
|| t
== ctx
->i64
)
235 unreachable("Unhandled integer size");
239 ac_to_integer_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
241 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
242 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
243 return LLVMVectorType(to_integer_type_scalar(ctx
, elem_type
),
244 LLVMGetVectorSize(t
));
246 if (LLVMGetTypeKind(t
) == LLVMPointerTypeKind
) {
247 switch (LLVMGetPointerAddressSpace(t
)) {
248 case AC_ADDR_SPACE_GLOBAL
:
250 case AC_ADDR_SPACE_CONST_32BIT
:
251 case AC_ADDR_SPACE_LDS
:
254 unreachable("unhandled address space");
257 return to_integer_type_scalar(ctx
, t
);
261 ac_to_integer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
263 LLVMTypeRef type
= LLVMTypeOf(v
);
264 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
265 return LLVMBuildPtrToInt(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
267 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
271 ac_to_integer_or_pointer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
273 LLVMTypeRef type
= LLVMTypeOf(v
);
274 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
)
276 return ac_to_integer(ctx
, v
);
279 static LLVMTypeRef
to_float_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
283 else if (t
== ctx
->i16
|| t
== ctx
->f16
)
285 else if (t
== ctx
->i32
|| t
== ctx
->f32
)
287 else if (t
== ctx
->i64
|| t
== ctx
->f64
)
290 unreachable("Unhandled float size");
294 ac_to_float_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
296 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
297 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
298 return LLVMVectorType(to_float_type_scalar(ctx
, elem_type
),
299 LLVMGetVectorSize(t
));
301 return to_float_type_scalar(ctx
, t
);
305 ac_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
307 LLVMTypeRef type
= LLVMTypeOf(v
);
308 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_float_type(ctx
, type
), "");
313 ac_build_intrinsic(struct ac_llvm_context
*ctx
, const char *name
,
314 LLVMTypeRef return_type
, LLVMValueRef
*params
,
315 unsigned param_count
, unsigned attrib_mask
)
317 LLVMValueRef function
, call
;
318 bool set_callsite_attrs
= !(attrib_mask
& AC_FUNC_ATTR_LEGACY
);
320 function
= LLVMGetNamedFunction(ctx
->module
, name
);
322 LLVMTypeRef param_types
[32], function_type
;
325 assert(param_count
<= 32);
327 for (i
= 0; i
< param_count
; ++i
) {
329 param_types
[i
] = LLVMTypeOf(params
[i
]);
332 LLVMFunctionType(return_type
, param_types
, param_count
, 0);
333 function
= LLVMAddFunction(ctx
->module
, name
, function_type
);
335 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
336 LLVMSetLinkage(function
, LLVMExternalLinkage
);
338 if (!set_callsite_attrs
)
339 ac_add_func_attributes(ctx
->context
, function
, attrib_mask
);
342 call
= LLVMBuildCall(ctx
->builder
, function
, params
, param_count
, "");
343 if (set_callsite_attrs
)
344 ac_add_func_attributes(ctx
->context
, call
, attrib_mask
);
349 * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
352 void ac_build_type_name_for_intr(LLVMTypeRef type
, char *buf
, unsigned bufsize
)
354 LLVMTypeRef elem_type
= type
;
356 assert(bufsize
>= 8);
358 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
) {
359 int ret
= snprintf(buf
, bufsize
, "v%u",
360 LLVMGetVectorSize(type
));
362 char *type_name
= LLVMPrintTypeToString(type
);
363 fprintf(stderr
, "Error building type name for: %s\n",
365 LLVMDisposeMessage(type_name
);
368 elem_type
= LLVMGetElementType(type
);
372 switch (LLVMGetTypeKind(elem_type
)) {
374 case LLVMIntegerTypeKind
:
375 snprintf(buf
, bufsize
, "i%d", LLVMGetIntTypeWidth(elem_type
));
377 case LLVMHalfTypeKind
:
378 snprintf(buf
, bufsize
, "f16");
380 case LLVMFloatTypeKind
:
381 snprintf(buf
, bufsize
, "f32");
383 case LLVMDoubleTypeKind
:
384 snprintf(buf
, bufsize
, "f64");
390 * Helper function that builds an LLVM IR PHI node and immediately adds
394 ac_build_phi(struct ac_llvm_context
*ctx
, LLVMTypeRef type
,
395 unsigned count_incoming
, LLVMValueRef
*values
,
396 LLVMBasicBlockRef
*blocks
)
398 LLVMValueRef phi
= LLVMBuildPhi(ctx
->builder
, type
, "");
399 LLVMAddIncoming(phi
, values
, blocks
, count_incoming
);
403 void ac_build_s_barrier(struct ac_llvm_context
*ctx
)
405 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.barrier", ctx
->voidt
, NULL
,
406 0, AC_FUNC_ATTR_CONVERGENT
);
409 /* Prevent optimizations (at least of memory accesses) across the current
410 * point in the program by emitting empty inline assembly that is marked as
411 * having side effects.
413 * Optionally, a value can be passed through the inline assembly to prevent
414 * LLVM from hoisting calls to ReadNone functions.
417 ac_build_optimization_barrier(struct ac_llvm_context
*ctx
,
420 static int counter
= 0;
422 LLVMBuilderRef builder
= ctx
->builder
;
425 snprintf(code
, sizeof(code
), "; %d", p_atomic_inc_return(&counter
));
428 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->voidt
, NULL
, 0, false);
429 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "", true, false);
430 LLVMBuildCall(builder
, inlineasm
, NULL
, 0, "");
432 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->i32
, &ctx
->i32
, 1, false);
433 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "=v,0", true, false);
434 LLVMTypeRef type
= LLVMTypeOf(*pvgpr
);
435 unsigned bitsize
= ac_get_elem_bits(ctx
, type
);
436 LLVMValueRef vgpr
= *pvgpr
;
437 LLVMTypeRef vgpr_type
;
442 vgpr
= LLVMBuildZExt(ctx
->builder
, vgpr
, ctx
->i32
, "");
444 vgpr_type
= LLVMTypeOf(vgpr
);
445 vgpr_size
= ac_get_type_size(vgpr_type
);
447 assert(vgpr_size
% 4 == 0);
449 vgpr
= LLVMBuildBitCast(builder
, vgpr
, LLVMVectorType(ctx
->i32
, vgpr_size
/ 4), "");
450 vgpr0
= LLVMBuildExtractElement(builder
, vgpr
, ctx
->i32_0
, "");
451 vgpr0
= LLVMBuildCall(builder
, inlineasm
, &vgpr0
, 1, "");
452 vgpr
= LLVMBuildInsertElement(builder
, vgpr
, vgpr0
, ctx
->i32_0
, "");
453 vgpr
= LLVMBuildBitCast(builder
, vgpr
, vgpr_type
, "");
456 vgpr
= LLVMBuildTrunc(builder
, vgpr
, type
, "");
463 ac_build_shader_clock(struct ac_llvm_context
*ctx
, nir_scope scope
)
465 const char *name
= scope
== NIR_SCOPE_DEVICE
? "llvm.amdgcn.s.memrealtime" : "llvm.amdgcn.s.memtime";
466 LLVMValueRef tmp
= ac_build_intrinsic(ctx
, name
, ctx
->i64
, NULL
, 0, 0);
467 return LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->v2i32
, "");
471 ac_build_ballot(struct ac_llvm_context
*ctx
,
476 if (LLVM_VERSION_MAJOR
>= 9) {
477 if (ctx
->wave_size
== 64)
478 name
= "llvm.amdgcn.icmp.i64.i32";
480 name
= "llvm.amdgcn.icmp.i32.i32";
482 name
= "llvm.amdgcn.icmp.i32";
484 LLVMValueRef args
[3] = {
487 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0)
490 /* We currently have no other way to prevent LLVM from lifting the icmp
491 * calls to a dominating basic block.
493 ac_build_optimization_barrier(ctx
, &args
[0]);
495 args
[0] = ac_to_integer(ctx
, args
[0]);
497 return ac_build_intrinsic(ctx
, name
, ctx
->iN_wavemask
, args
, 3,
498 AC_FUNC_ATTR_NOUNWIND
|
499 AC_FUNC_ATTR_READNONE
|
500 AC_FUNC_ATTR_CONVERGENT
);
503 LLVMValueRef
ac_get_i1_sgpr_mask(struct ac_llvm_context
*ctx
,
508 if (LLVM_VERSION_MAJOR
>= 9) {
509 if (ctx
->wave_size
== 64)
510 name
= "llvm.amdgcn.icmp.i64.i1";
512 name
= "llvm.amdgcn.icmp.i32.i1";
514 name
= "llvm.amdgcn.icmp.i1";
516 LLVMValueRef args
[3] = {
519 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0),
522 return ac_build_intrinsic(ctx
, name
, ctx
->iN_wavemask
, args
, 3,
523 AC_FUNC_ATTR_NOUNWIND
|
524 AC_FUNC_ATTR_READNONE
|
525 AC_FUNC_ATTR_CONVERGENT
);
529 ac_build_vote_all(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
531 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
532 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
533 return LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, vote_set
, active_set
, "");
537 ac_build_vote_any(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
539 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
540 return LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, vote_set
,
541 LLVMConstInt(ctx
->iN_wavemask
, 0, 0), "");
545 ac_build_vote_eq(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
547 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
548 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
550 LLVMValueRef all
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
551 vote_set
, active_set
, "");
552 LLVMValueRef none
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
554 LLVMConstInt(ctx
->iN_wavemask
, 0, 0), "");
555 return LLVMBuildOr(ctx
->builder
, all
, none
, "");
559 ac_build_varying_gather_values(struct ac_llvm_context
*ctx
, LLVMValueRef
*values
,
560 unsigned value_count
, unsigned component
)
562 LLVMValueRef vec
= NULL
;
564 if (value_count
== 1) {
565 return values
[component
];
566 } else if (!value_count
)
567 unreachable("value_count is 0");
569 for (unsigned i
= component
; i
< value_count
+ component
; i
++) {
570 LLVMValueRef value
= values
[i
];
573 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
574 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
- component
, false);
575 vec
= LLVMBuildInsertElement(ctx
->builder
, vec
, value
, index
, "");
581 ac_build_gather_values_extended(struct ac_llvm_context
*ctx
,
582 LLVMValueRef
*values
,
583 unsigned value_count
,
584 unsigned value_stride
,
588 LLVMBuilderRef builder
= ctx
->builder
;
589 LLVMValueRef vec
= NULL
;
592 if (value_count
== 1 && !always_vector
) {
594 return LLVMBuildLoad(builder
, values
[0], "");
596 } else if (!value_count
)
597 unreachable("value_count is 0");
599 for (i
= 0; i
< value_count
; i
++) {
600 LLVMValueRef value
= values
[i
* value_stride
];
602 value
= LLVMBuildLoad(builder
, value
, "");
605 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
606 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
, false);
607 vec
= LLVMBuildInsertElement(builder
, vec
, value
, index
, "");
613 ac_build_gather_values(struct ac_llvm_context
*ctx
,
614 LLVMValueRef
*values
,
615 unsigned value_count
)
617 return ac_build_gather_values_extended(ctx
, values
, value_count
, 1, false, false);
620 /* Expand a scalar or vector to <dst_channels x type> by filling the remaining
621 * channels with undef. Extract at most src_channels components from the input.
624 ac_build_expand(struct ac_llvm_context
*ctx
,
626 unsigned src_channels
,
627 unsigned dst_channels
)
629 LLVMTypeRef elemtype
;
630 LLVMValueRef chan
[dst_channels
];
632 if (LLVMGetTypeKind(LLVMTypeOf(value
)) == LLVMVectorTypeKind
) {
633 unsigned vec_size
= LLVMGetVectorSize(LLVMTypeOf(value
));
635 if (src_channels
== dst_channels
&& vec_size
== dst_channels
)
638 src_channels
= MIN2(src_channels
, vec_size
);
640 for (unsigned i
= 0; i
< src_channels
; i
++)
641 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
);
643 elemtype
= LLVMGetElementType(LLVMTypeOf(value
));
646 assert(src_channels
== 1);
649 elemtype
= LLVMTypeOf(value
);
652 for (unsigned i
= src_channels
; i
< dst_channels
; i
++)
653 chan
[i
] = LLVMGetUndef(elemtype
);
655 return ac_build_gather_values(ctx
, chan
, dst_channels
);
658 /* Extract components [start, start + channels) from a vector.
661 ac_extract_components(struct ac_llvm_context
*ctx
,
666 LLVMValueRef chan
[channels
];
668 for (unsigned i
= 0; i
< channels
; i
++)
669 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
+ start
);
671 return ac_build_gather_values(ctx
, chan
, channels
);
674 /* Expand a scalar or vector to <4 x type> by filling the remaining channels
675 * with undef. Extract at most num_channels components from the input.
677 LLVMValueRef
ac_build_expand_to_vec4(struct ac_llvm_context
*ctx
,
679 unsigned num_channels
)
681 return ac_build_expand(ctx
, value
, num_channels
, 4);
684 LLVMValueRef
ac_build_round(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
686 unsigned type_size
= ac_get_type_size(LLVMTypeOf(value
));
690 name
= "llvm.rint.f16";
691 else if (type_size
== 4)
692 name
= "llvm.rint.f32";
694 name
= "llvm.rint.f64";
696 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(value
), &value
, 1,
697 AC_FUNC_ATTR_READNONE
);
701 ac_build_fdiv(struct ac_llvm_context
*ctx
,
705 unsigned type_size
= ac_get_type_size(LLVMTypeOf(den
));
709 name
= "llvm.amdgcn.rcp.f16";
710 else if (type_size
== 4)
711 name
= "llvm.amdgcn.rcp.f32";
713 name
= "llvm.amdgcn.rcp.f64";
715 LLVMValueRef rcp
= ac_build_intrinsic(ctx
, name
, LLVMTypeOf(den
),
716 &den
, 1, AC_FUNC_ATTR_READNONE
);
718 return LLVMBuildFMul(ctx
->builder
, num
, rcp
, "");
721 /* See fast_idiv_by_const.h. */
722 /* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */
723 LLVMValueRef
ac_build_fast_udiv(struct ac_llvm_context
*ctx
,
725 LLVMValueRef multiplier
,
726 LLVMValueRef pre_shift
,
727 LLVMValueRef post_shift
,
728 LLVMValueRef increment
)
730 LLVMBuilderRef builder
= ctx
->builder
;
732 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
733 num
= LLVMBuildMul(builder
,
734 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
735 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
736 num
= LLVMBuildAdd(builder
, num
,
737 LLVMBuildZExt(builder
, increment
, ctx
->i64
, ""), "");
738 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
739 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
740 return LLVMBuildLShr(builder
, num
, post_shift
, "");
743 /* See fast_idiv_by_const.h. */
744 /* If num != UINT_MAX, this more efficient version can be used. */
745 /* Set: increment = util_fast_udiv_info::increment; */
746 LLVMValueRef
ac_build_fast_udiv_nuw(struct ac_llvm_context
*ctx
,
748 LLVMValueRef multiplier
,
749 LLVMValueRef pre_shift
,
750 LLVMValueRef post_shift
,
751 LLVMValueRef increment
)
753 LLVMBuilderRef builder
= ctx
->builder
;
755 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
756 num
= LLVMBuildNUWAdd(builder
, num
, increment
, "");
757 num
= LLVMBuildMul(builder
,
758 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
759 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
760 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
761 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
762 return LLVMBuildLShr(builder
, num
, post_shift
, "");
765 /* See fast_idiv_by_const.h. */
766 /* Both operands must fit in 31 bits and the divisor must not be 1. */
767 LLVMValueRef
ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context
*ctx
,
769 LLVMValueRef multiplier
,
770 LLVMValueRef post_shift
)
772 LLVMBuilderRef builder
= ctx
->builder
;
774 num
= LLVMBuildMul(builder
,
775 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
776 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
777 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
778 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
779 return LLVMBuildLShr(builder
, num
, post_shift
, "");
782 /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
783 * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
784 * already multiplied by two. id is the cube face number.
786 struct cube_selection_coords
{
793 build_cube_intrinsic(struct ac_llvm_context
*ctx
,
795 struct cube_selection_coords
*out
)
797 LLVMTypeRef f32
= ctx
->f32
;
799 out
->stc
[1] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubetc",
800 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
801 out
->stc
[0] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubesc",
802 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
803 out
->ma
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubema",
804 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
805 out
->id
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubeid",
806 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
810 * Build a manual selection sequence for cube face sc/tc coordinates and
811 * major axis vector (multiplied by 2 for consistency) for the given
812 * vec3 \p coords, for the face implied by \p selcoords.
814 * For the major axis, we always adjust the sign to be in the direction of
815 * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
816 * the selcoords major axis.
818 static void build_cube_select(struct ac_llvm_context
*ctx
,
819 const struct cube_selection_coords
*selcoords
,
820 const LLVMValueRef
*coords
,
821 LLVMValueRef
*out_st
,
822 LLVMValueRef
*out_ma
)
824 LLVMBuilderRef builder
= ctx
->builder
;
825 LLVMTypeRef f32
= LLVMTypeOf(coords
[0]);
826 LLVMValueRef is_ma_positive
;
828 LLVMValueRef is_ma_z
, is_not_ma_z
;
829 LLVMValueRef is_ma_y
;
830 LLVMValueRef is_ma_x
;
834 is_ma_positive
= LLVMBuildFCmp(builder
, LLVMRealUGE
,
835 selcoords
->ma
, LLVMConstReal(f32
, 0.0), "");
836 sgn_ma
= LLVMBuildSelect(builder
, is_ma_positive
,
837 LLVMConstReal(f32
, 1.0), LLVMConstReal(f32
, -1.0), "");
839 is_ma_z
= LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 4.0), "");
840 is_not_ma_z
= LLVMBuildNot(builder
, is_ma_z
, "");
841 is_ma_y
= LLVMBuildAnd(builder
, is_not_ma_z
,
842 LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 2.0), ""), "");
843 is_ma_x
= LLVMBuildAnd(builder
, is_not_ma_z
, LLVMBuildNot(builder
, is_ma_y
, ""), "");
846 tmp
= LLVMBuildSelect(builder
, is_ma_x
, coords
[2], coords
[0], "");
847 sgn
= LLVMBuildSelect(builder
, is_ma_y
, LLVMConstReal(f32
, 1.0),
848 LLVMBuildSelect(builder
, is_ma_z
, sgn_ma
,
849 LLVMBuildFNeg(builder
, sgn_ma
, ""), ""), "");
850 out_st
[0] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
853 tmp
= LLVMBuildSelect(builder
, is_ma_y
, coords
[2], coords
[1], "");
854 sgn
= LLVMBuildSelect(builder
, is_ma_y
, sgn_ma
,
855 LLVMConstReal(f32
, -1.0), "");
856 out_st
[1] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
859 tmp
= LLVMBuildSelect(builder
, is_ma_z
, coords
[2],
860 LLVMBuildSelect(builder
, is_ma_y
, coords
[1], coords
[0], ""), "");
861 tmp
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
862 ctx
->f32
, &tmp
, 1, AC_FUNC_ATTR_READNONE
);
863 *out_ma
= LLVMBuildFMul(builder
, tmp
, LLVMConstReal(f32
, 2.0), "");
867 ac_prepare_cube_coords(struct ac_llvm_context
*ctx
,
868 bool is_deriv
, bool is_array
, bool is_lod
,
869 LLVMValueRef
*coords_arg
,
870 LLVMValueRef
*derivs_arg
)
873 LLVMBuilderRef builder
= ctx
->builder
;
874 struct cube_selection_coords selcoords
;
875 LLVMValueRef coords
[3];
878 if (is_array
&& !is_lod
) {
879 LLVMValueRef tmp
= ac_build_round(ctx
, coords_arg
[3]);
881 /* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says:
883 * "For Array forms, the array layer used will be
885 * max(0, min(d−1, floor(layer+0.5)))
887 * where d is the depth of the texture array and layer
888 * comes from the component indicated in the tables below.
889 * Workaroudn for an issue where the layer is taken from a
890 * helper invocation which happens to fall on a different
891 * layer due to extrapolation."
893 * GFX8 and earlier attempt to implement this in hardware by
894 * clamping the value of coords[2] = (8 * layer) + face.
895 * Unfortunately, this means that the we end up with the wrong
896 * face when clamping occurs.
898 * Clamp the layer earlier to work around the issue.
900 if (ctx
->chip_class
<= GFX8
) {
902 ge0
= LLVMBuildFCmp(builder
, LLVMRealOGE
, tmp
, ctx
->f32_0
, "");
903 tmp
= LLVMBuildSelect(builder
, ge0
, tmp
, ctx
->f32_0
, "");
909 build_cube_intrinsic(ctx
, coords_arg
, &selcoords
);
911 invma
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
912 ctx
->f32
, &selcoords
.ma
, 1, AC_FUNC_ATTR_READNONE
);
913 invma
= ac_build_fdiv(ctx
, LLVMConstReal(ctx
->f32
, 1.0), invma
);
915 for (int i
= 0; i
< 2; ++i
)
916 coords
[i
] = LLVMBuildFMul(builder
, selcoords
.stc
[i
], invma
, "");
918 coords
[2] = selcoords
.id
;
920 if (is_deriv
&& derivs_arg
) {
921 LLVMValueRef derivs
[4];
924 /* Convert cube derivatives to 2D derivatives. */
925 for (axis
= 0; axis
< 2; axis
++) {
926 LLVMValueRef deriv_st
[2];
927 LLVMValueRef deriv_ma
;
929 /* Transform the derivative alongside the texture
930 * coordinate. Mathematically, the correct formula is
931 * as follows. Assume we're projecting onto the +Z face
932 * and denote by dx/dh the derivative of the (original)
933 * X texture coordinate with respect to horizontal
934 * window coordinates. The projection onto the +Z face
939 * Then df/dh = df/dx * dx/dh + df/dz * dz/dh
940 * = 1/z * dx/dh - x/z * 1/z * dz/dh.
942 * This motivatives the implementation below.
944 * Whether this actually gives the expected results for
945 * apps that might feed in derivatives obtained via
946 * finite differences is anyone's guess. The OpenGL spec
947 * seems awfully quiet about how textureGrad for cube
948 * maps should be handled.
950 build_cube_select(ctx
, &selcoords
, &derivs_arg
[axis
* 3],
951 deriv_st
, &deriv_ma
);
953 deriv_ma
= LLVMBuildFMul(builder
, deriv_ma
, invma
, "");
955 for (int i
= 0; i
< 2; ++i
)
956 derivs
[axis
* 2 + i
] =
957 LLVMBuildFSub(builder
,
958 LLVMBuildFMul(builder
, deriv_st
[i
], invma
, ""),
959 LLVMBuildFMul(builder
, deriv_ma
, coords
[i
], ""), "");
962 memcpy(derivs_arg
, derivs
, sizeof(derivs
));
965 /* Shift the texture coordinate. This must be applied after the
966 * derivative calculation.
968 for (int i
= 0; i
< 2; ++i
)
969 coords
[i
] = LLVMBuildFAdd(builder
, coords
[i
], LLVMConstReal(ctx
->f32
, 1.5), "");
972 /* for cube arrays coord.z = coord.w(array_index) * 8 + face */
973 /* coords_arg.w component - array_index for cube arrays */
974 coords
[2] = ac_build_fmad(ctx
, coords_arg
[3], LLVMConstReal(ctx
->f32
, 8.0), coords
[2]);
977 memcpy(coords_arg
, coords
, sizeof(coords
));
982 ac_build_fs_interp(struct ac_llvm_context
*ctx
,
983 LLVMValueRef llvm_chan
,
984 LLVMValueRef attr_number
,
989 LLVMValueRef args
[5];
994 args
[2] = attr_number
;
997 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1",
998 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
1002 args
[2] = llvm_chan
;
1003 args
[3] = attr_number
;
1006 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2",
1007 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
1011 ac_build_fs_interp_f16(struct ac_llvm_context
*ctx
,
1012 LLVMValueRef llvm_chan
,
1013 LLVMValueRef attr_number
,
1014 LLVMValueRef params
,
1018 LLVMValueRef args
[6];
1022 args
[1] = llvm_chan
;
1023 args
[2] = attr_number
;
1024 args
[3] = ctx
->i1false
;
1027 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1.f16",
1028 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
1032 args
[2] = llvm_chan
;
1033 args
[3] = attr_number
;
1034 args
[4] = ctx
->i1false
;
1037 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2.f16",
1038 ctx
->f16
, args
, 6, AC_FUNC_ATTR_READNONE
);
1042 ac_build_fs_interp_mov(struct ac_llvm_context
*ctx
,
1043 LLVMValueRef parameter
,
1044 LLVMValueRef llvm_chan
,
1045 LLVMValueRef attr_number
,
1046 LLVMValueRef params
)
1048 LLVMValueRef args
[4];
1050 args
[0] = parameter
;
1051 args
[1] = llvm_chan
;
1052 args
[2] = attr_number
;
1055 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.mov",
1056 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
1060 ac_build_gep_ptr(struct ac_llvm_context
*ctx
,
1061 LLVMValueRef base_ptr
,
1064 return LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1068 ac_build_gep0(struct ac_llvm_context
*ctx
,
1069 LLVMValueRef base_ptr
,
1072 LLVMValueRef indices
[2] = {
1076 return LLVMBuildGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
1079 LLVMValueRef
ac_build_pointer_add(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
1082 return LLVMBuildPointerCast(ctx
->builder
,
1083 LLVMBuildGEP(ctx
->builder
, ptr
, &index
, 1, ""),
1084 LLVMTypeOf(ptr
), "");
1088 ac_build_indexed_store(struct ac_llvm_context
*ctx
,
1089 LLVMValueRef base_ptr
, LLVMValueRef index
,
1092 LLVMBuildStore(ctx
->builder
, value
,
1093 ac_build_gep0(ctx
, base_ptr
, index
));
1097 * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
1098 * It's equivalent to doing a load from &base_ptr[index].
1100 * \param base_ptr Where the array starts.
1101 * \param index The element index into the array.
1102 * \param uniform Whether the base_ptr and index can be assumed to be
1103 * dynamically uniform (i.e. load to an SGPR)
1104 * \param invariant Whether the load is invariant (no other opcodes affect it)
1105 * \param no_unsigned_wraparound
1106 * For all possible re-associations and re-distributions of an expression
1107 * "base_ptr + index * elemsize" into "addr + offset" (excluding GEPs
1108 * without inbounds in base_ptr), this parameter is true if "addr + offset"
1109 * does not result in an unsigned integer wraparound. This is used for
1110 * optimal code generation of 32-bit pointer arithmetic.
1112 * For example, a 32-bit immediate offset that causes a 32-bit unsigned
1113 * integer wraparound can't be an imm offset in s_load_dword, because
1114 * the instruction performs "addr + offset" in 64 bits.
1116 * Expected usage for bindless textures by chaining GEPs:
1117 * // possible unsigned wraparound, don't use InBounds:
1118 * ptr1 = LLVMBuildGEP(base_ptr, index);
1119 * image = load(ptr1); // becomes "s_load ptr1, 0"
1121 * ptr2 = LLVMBuildInBoundsGEP(ptr1, 32 / elemsize);
1122 * sampler = load(ptr2); // becomes "s_load ptr1, 32" thanks to InBounds
1125 ac_build_load_custom(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1126 LLVMValueRef index
, bool uniform
, bool invariant
,
1127 bool no_unsigned_wraparound
)
1129 LLVMValueRef pointer
, result
;
1131 if (no_unsigned_wraparound
&&
1132 LLVMGetPointerAddressSpace(LLVMTypeOf(base_ptr
)) == AC_ADDR_SPACE_CONST_32BIT
)
1133 pointer
= LLVMBuildInBoundsGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1135 pointer
= LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1138 LLVMSetMetadata(pointer
, ctx
->uniform_md_kind
, ctx
->empty_md
);
1139 result
= LLVMBuildLoad(ctx
->builder
, pointer
, "");
1141 LLVMSetMetadata(result
, ctx
->invariant_load_md_kind
, ctx
->empty_md
);
1145 LLVMValueRef
ac_build_load(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1148 return ac_build_load_custom(ctx
, base_ptr
, index
, false, false, false);
1151 LLVMValueRef
ac_build_load_invariant(struct ac_llvm_context
*ctx
,
1152 LLVMValueRef base_ptr
, LLVMValueRef index
)
1154 return ac_build_load_custom(ctx
, base_ptr
, index
, false, true, false);
1157 /* This assumes that there is no unsigned integer wraparound during the address
1158 * computation, excluding all GEPs within base_ptr. */
1159 LLVMValueRef
ac_build_load_to_sgpr(struct ac_llvm_context
*ctx
,
1160 LLVMValueRef base_ptr
, LLVMValueRef index
)
1162 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, true);
1165 /* See ac_build_load_custom() documentation. */
1166 LLVMValueRef
ac_build_load_to_sgpr_uint_wraparound(struct ac_llvm_context
*ctx
,
1167 LLVMValueRef base_ptr
, LLVMValueRef index
)
1169 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, false);
1172 static unsigned get_load_cache_policy(struct ac_llvm_context
*ctx
,
1173 unsigned cache_policy
)
1175 return cache_policy
|
1176 (ctx
->chip_class
>= GFX10
&& cache_policy
& ac_glc
? ac_dlc
: 0);
1180 ac_build_buffer_store_common(struct ac_llvm_context
*ctx
,
1183 LLVMValueRef vindex
,
1184 LLVMValueRef voffset
,
1185 LLVMValueRef soffset
,
1186 unsigned cache_policy
,
1190 LLVMValueRef args
[6];
1193 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1195 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1196 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1197 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1198 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
1199 const char *indexing_kind
= structurized
? "struct" : "raw";
1200 char name
[256], type_name
[8];
1202 ac_build_type_name_for_intr(LLVMTypeOf(data
), type_name
, sizeof(type_name
));
1205 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.format.%s",
1206 indexing_kind
, type_name
);
1208 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.%s",
1209 indexing_kind
, type_name
);
1212 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
1213 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1217 ac_build_buffer_store_format(struct ac_llvm_context
*ctx
,
1220 LLVMValueRef vindex
,
1221 LLVMValueRef voffset
,
1222 unsigned cache_policy
)
1224 ac_build_buffer_store_common(ctx
, rsrc
, data
, vindex
, voffset
, NULL
,
1225 cache_policy
, true, true);
1228 /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
1229 * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
1230 * or v4i32 (num_channels=3,4).
1233 ac_build_buffer_store_dword(struct ac_llvm_context
*ctx
,
1236 unsigned num_channels
,
1237 LLVMValueRef voffset
,
1238 LLVMValueRef soffset
,
1239 unsigned inst_offset
,
1240 unsigned cache_policy
)
1242 /* Split 3 channel stores, because only LLVM 9+ support 3-channel
1244 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false)) {
1245 LLVMValueRef v
[3], v01
;
1247 for (int i
= 0; i
< 3; i
++) {
1248 v
[i
] = LLVMBuildExtractElement(ctx
->builder
, vdata
,
1249 LLVMConstInt(ctx
->i32
, i
, 0), "");
1251 v01
= ac_build_gather_values(ctx
, v
, 2);
1253 ac_build_buffer_store_dword(ctx
, rsrc
, v01
, 2, voffset
,
1254 soffset
, inst_offset
, cache_policy
);
1255 ac_build_buffer_store_dword(ctx
, rsrc
, v
[2], 1, voffset
,
1256 soffset
, inst_offset
+ 8,
1261 /* SWIZZLE_ENABLE requires that soffset isn't folded into voffset
1262 * (voffset is swizzled, but soffset isn't swizzled).
1263 * llvm.amdgcn.buffer.store doesn't have a separate soffset parameter.
1265 if (!(cache_policy
& ac_swizzled
)) {
1266 LLVMValueRef offset
= soffset
;
1269 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1270 LLVMConstInt(ctx
->i32
, inst_offset
, 0), "");
1272 ac_build_buffer_store_common(ctx
, rsrc
, ac_to_float(ctx
, vdata
),
1273 ctx
->i32_0
, voffset
, offset
,
1274 cache_policy
, false, false);
1278 static const unsigned dfmts
[] = {
1279 V_008F0C_BUF_DATA_FORMAT_32
,
1280 V_008F0C_BUF_DATA_FORMAT_32_32
,
1281 V_008F0C_BUF_DATA_FORMAT_32_32_32
,
1282 V_008F0C_BUF_DATA_FORMAT_32_32_32_32
1284 unsigned dfmt
= dfmts
[num_channels
- 1];
1285 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1286 LLVMValueRef immoffset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1288 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1289 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
);
1293 ac_build_buffer_load_common(struct ac_llvm_context
*ctx
,
1295 LLVMValueRef vindex
,
1296 LLVMValueRef voffset
,
1297 LLVMValueRef soffset
,
1298 unsigned num_channels
,
1299 LLVMTypeRef channel_type
,
1300 unsigned cache_policy
,
1305 LLVMValueRef args
[5];
1307 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1309 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1310 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1311 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1312 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1313 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, use_format
) && num_channels
== 3 ? 4 : num_channels
;
1314 const char *indexing_kind
= structurized
? "struct" : "raw";
1315 char name
[256], type_name
[8];
1317 /* D16 is only supported on gfx8+ */
1318 assert(!use_format
||
1319 (channel_type
!= ctx
->f16
&& channel_type
!= ctx
->i16
) ||
1320 ctx
->chip_class
>= GFX8
);
1322 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(channel_type
, func
) : channel_type
;
1323 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1326 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.format.%s",
1327 indexing_kind
, type_name
);
1329 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.%s",
1330 indexing_kind
, type_name
);
1333 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1334 ac_get_load_intr_attribs(can_speculate
));
1338 ac_build_buffer_load(struct ac_llvm_context
*ctx
,
1341 LLVMValueRef vindex
,
1342 LLVMValueRef voffset
,
1343 LLVMValueRef soffset
,
1344 unsigned inst_offset
,
1345 unsigned cache_policy
,
1349 LLVMValueRef offset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1351 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1353 offset
= LLVMBuildAdd(ctx
->builder
, offset
, soffset
, "");
1355 if (allow_smem
&& !(cache_policy
& ac_slc
) &&
1356 (!(cache_policy
& ac_glc
) || ctx
->chip_class
>= GFX8
)) {
1357 assert(vindex
== NULL
);
1359 LLVMValueRef result
[8];
1361 for (int i
= 0; i
< num_channels
; i
++) {
1363 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1364 LLVMConstInt(ctx
->i32
, 4, 0), "");
1366 LLVMValueRef args
[3] = {
1369 LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0),
1371 result
[i
] = ac_build_intrinsic(ctx
,
1372 "llvm.amdgcn.s.buffer.load.f32",
1374 AC_FUNC_ATTR_READNONE
);
1376 if (num_channels
== 1)
1379 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false))
1380 result
[num_channels
++] = LLVMGetUndef(ctx
->f32
);
1381 return ac_build_gather_values(ctx
, result
, num_channels
);
1384 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
,
1386 num_channels
, ctx
->f32
,
1388 can_speculate
, false, false);
1391 LLVMValueRef
ac_build_buffer_load_format(struct ac_llvm_context
*ctx
,
1393 LLVMValueRef vindex
,
1394 LLVMValueRef voffset
,
1395 unsigned num_channels
,
1396 unsigned cache_policy
,
1400 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
, voffset
,
1401 ctx
->i32_0
, num_channels
,
1402 d16
? ctx
->f16
: ctx
->f32
,
1403 cache_policy
, can_speculate
,
1408 ac_build_tbuffer_load(struct ac_llvm_context
*ctx
,
1410 LLVMValueRef vindex
,
1411 LLVMValueRef voffset
,
1412 LLVMValueRef soffset
,
1413 LLVMValueRef immoffset
,
1414 unsigned num_channels
,
1417 unsigned cache_policy
,
1421 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1423 LLVMValueRef args
[6];
1425 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1427 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1428 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1429 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1430 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
->chip_class
, dfmt
, nfmt
), 0);
1431 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1432 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
1433 const char *indexing_kind
= structurized
? "struct" : "raw";
1434 char name
[256], type_name
[8];
1436 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
1437 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1439 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.load.%s",
1440 indexing_kind
, type_name
);
1442 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1443 ac_get_load_intr_attribs(can_speculate
));
1447 ac_build_struct_tbuffer_load(struct ac_llvm_context
*ctx
,
1449 LLVMValueRef vindex
,
1450 LLVMValueRef voffset
,
1451 LLVMValueRef soffset
,
1452 LLVMValueRef immoffset
,
1453 unsigned num_channels
,
1456 unsigned cache_policy
,
1459 return ac_build_tbuffer_load(ctx
, rsrc
, vindex
, voffset
, soffset
,
1460 immoffset
, num_channels
, dfmt
, nfmt
,
1461 cache_policy
, can_speculate
, true);
1465 ac_build_raw_tbuffer_load(struct ac_llvm_context
*ctx
,
1467 LLVMValueRef voffset
,
1468 LLVMValueRef soffset
,
1469 LLVMValueRef immoffset
,
1470 unsigned num_channels
,
1473 unsigned cache_policy
,
1476 return ac_build_tbuffer_load(ctx
, rsrc
, NULL
, voffset
, soffset
,
1477 immoffset
, num_channels
, dfmt
, nfmt
,
1478 cache_policy
, can_speculate
, false);
1482 ac_build_tbuffer_load_short(struct ac_llvm_context
*ctx
,
1484 LLVMValueRef voffset
,
1485 LLVMValueRef soffset
,
1486 LLVMValueRef immoffset
,
1487 unsigned cache_policy
)
1491 if (LLVM_VERSION_MAJOR
>= 9) {
1492 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1494 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1495 res
= ac_build_buffer_load_common(ctx
, rsrc
, NULL
,
1497 1, ctx
->i16
, cache_policy
,
1498 false, false, false);
1500 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1501 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1503 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1504 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1507 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i16
, "");
1514 ac_build_tbuffer_load_byte(struct ac_llvm_context
*ctx
,
1516 LLVMValueRef voffset
,
1517 LLVMValueRef soffset
,
1518 LLVMValueRef immoffset
,
1519 unsigned cache_policy
)
1523 if (LLVM_VERSION_MAJOR
>= 9) {
1524 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1526 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1527 res
= ac_build_buffer_load_common(ctx
, rsrc
, NULL
,
1529 1, ctx
->i8
, cache_policy
,
1530 false, false, false);
1532 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
1533 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1535 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1536 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1539 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i8
, "");
1546 * Convert an 11- or 10-bit unsigned floating point number to an f32.
1548 * The input exponent is expected to be biased analogous to IEEE-754, i.e. by
1549 * 2^(exp_bits-1) - 1 (as defined in OpenGL and other graphics APIs).
1552 ac_ufN_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned exp_bits
, unsigned mant_bits
)
1554 assert(LLVMTypeOf(src
) == ctx
->i32
);
1557 LLVMValueRef mantissa
;
1558 mantissa
= LLVMBuildAnd(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, (1 << mant_bits
) - 1, false), "");
1560 /* Converting normal numbers is just a shift + correcting the exponent bias */
1561 unsigned normal_shift
= 23 - mant_bits
;
1562 unsigned bias_shift
= 127 - ((1 << (exp_bits
- 1)) - 1);
1563 LLVMValueRef shifted
, normal
;
1565 shifted
= LLVMBuildShl(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, normal_shift
, false), "");
1566 normal
= LLVMBuildAdd(ctx
->builder
, shifted
, LLVMConstInt(ctx
->i32
, bias_shift
<< 23, false), "");
1568 /* Converting nan/inf numbers is the same, but with a different exponent update */
1569 LLVMValueRef naninf
;
1570 naninf
= LLVMBuildOr(ctx
->builder
, normal
, LLVMConstInt(ctx
->i32
, 0xff << 23, false), "");
1572 /* Converting denormals is the complex case: determine the leading zeros of the
1573 * mantissa to obtain the correct shift for the mantissa and exponent correction.
1575 LLVMValueRef denormal
;
1576 LLVMValueRef params
[2] = {
1578 ctx
->i1true
, /* result can be undef when arg is 0 */
1580 LLVMValueRef ctlz
= ac_build_intrinsic(ctx
, "llvm.ctlz.i32", ctx
->i32
,
1581 params
, 2, AC_FUNC_ATTR_READNONE
);
1583 /* Shift such that the leading 1 ends up as the LSB of the exponent field. */
1584 tmp
= LLVMBuildSub(ctx
->builder
, ctlz
, LLVMConstInt(ctx
->i32
, 8, false), "");
1585 denormal
= LLVMBuildShl(ctx
->builder
, mantissa
, tmp
, "");
1587 unsigned denormal_exp
= bias_shift
+ (32 - mant_bits
) - 1;
1588 tmp
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, denormal_exp
, false), ctlz
, "");
1589 tmp
= LLVMBuildShl(ctx
->builder
, tmp
, LLVMConstInt(ctx
->i32
, 23, false), "");
1590 denormal
= LLVMBuildAdd(ctx
->builder
, denormal
, tmp
, "");
1592 /* Select the final result. */
1593 LLVMValueRef result
;
1595 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1596 LLVMConstInt(ctx
->i32
, ((1 << exp_bits
) - 1) << mant_bits
, false), "");
1597 result
= LLVMBuildSelect(ctx
->builder
, tmp
, naninf
, normal
, "");
1599 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1600 LLVMConstInt(ctx
->i32
, 1 << mant_bits
, false), "");
1601 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, denormal
, "");
1603 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, src
, ctx
->i32_0
, "");
1604 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, ctx
->i32_0
, "");
1606 return ac_to_float(ctx
, result
);
1610 * Generate a fully general open coded buffer format fetch with all required
1611 * fixups suitable for vertex fetch, using non-format buffer loads.
1613 * Some combinations of argument values have special interpretations:
1614 * - size = 8 bytes, format = fixed indicates PIPE_FORMAT_R11G11B10_FLOAT
1615 * - size = 8 bytes, format != {float,fixed} indicates a 2_10_10_10 data format
1617 * \param log_size log(size of channel in bytes)
1618 * \param num_channels number of channels (1 to 4)
1619 * \param format AC_FETCH_FORMAT_xxx value
1620 * \param reverse whether XYZ channels are reversed
1621 * \param known_aligned whether the source is known to be aligned to hardware's
1622 * effective element size for loading the given format
1623 * (note: this means dword alignment for 8_8_8_8, 16_16, etc.)
1624 * \param rsrc buffer resource descriptor
1625 * \return the resulting vector of floats or integers bitcast to <4 x i32>
1628 ac_build_opencoded_load_format(struct ac_llvm_context
*ctx
,
1630 unsigned num_channels
,
1635 LLVMValueRef vindex
,
1636 LLVMValueRef voffset
,
1637 LLVMValueRef soffset
,
1638 unsigned cache_policy
,
1642 unsigned load_log_size
= log_size
;
1643 unsigned load_num_channels
= num_channels
;
1644 if (log_size
== 3) {
1646 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1647 load_num_channels
= 2 * num_channels
;
1649 load_num_channels
= 1; /* 10_11_11 or 2_10_10_10 */
1653 int log_recombine
= 0;
1654 if (ctx
->chip_class
== GFX6
&& !known_aligned
) {
1655 /* Avoid alignment restrictions by loading one byte at a time. */
1656 load_num_channels
<<= load_log_size
;
1657 log_recombine
= load_log_size
;
1659 } else if (load_num_channels
== 2 || load_num_channels
== 4) {
1660 log_recombine
= -util_logbase2(load_num_channels
);
1661 load_num_channels
= 1;
1662 load_log_size
+= -log_recombine
;
1665 assert(load_log_size
>= 2 || LLVM_VERSION_MAJOR
>= 9);
1667 LLVMValueRef loads
[32]; /* up to 32 bytes */
1668 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1669 tmp
= LLVMBuildAdd(ctx
->builder
, soffset
,
1670 LLVMConstInt(ctx
->i32
, i
<< load_log_size
, false), "");
1671 LLVMTypeRef channel_type
= load_log_size
== 0 ? ctx
->i8
:
1672 load_log_size
== 1 ? ctx
->i16
: ctx
->i32
;
1673 unsigned num_channels
= 1 << (MAX2(load_log_size
, 2) - 2);
1674 loads
[i
] = ac_build_buffer_load_common(
1675 ctx
, rsrc
, vindex
, voffset
, tmp
,
1676 num_channels
, channel_type
, cache_policy
,
1677 can_speculate
, false, true);
1678 if (load_log_size
>= 2)
1679 loads
[i
] = ac_to_integer(ctx
, loads
[i
]);
1682 if (log_recombine
> 0) {
1683 /* Recombine bytes if necessary (GFX6 only) */
1684 LLVMTypeRef dst_type
= log_recombine
== 2 ? ctx
->i32
: ctx
->i16
;
1686 for (unsigned src
= 0, dst
= 0; src
< load_num_channels
; ++dst
) {
1687 LLVMValueRef accum
= NULL
;
1688 for (unsigned i
= 0; i
< (1 << log_recombine
); ++i
, ++src
) {
1689 tmp
= LLVMBuildZExt(ctx
->builder
, loads
[src
], dst_type
, "");
1693 tmp
= LLVMBuildShl(ctx
->builder
, tmp
,
1694 LLVMConstInt(dst_type
, 8 * i
, false), "");
1695 accum
= LLVMBuildOr(ctx
->builder
, accum
, tmp
, "");
1700 } else if (log_recombine
< 0) {
1701 /* Split vectors of dwords */
1702 if (load_log_size
> 2) {
1703 assert(load_num_channels
== 1);
1704 LLVMValueRef loaded
= loads
[0];
1705 unsigned log_split
= load_log_size
- 2;
1706 log_recombine
+= log_split
;
1707 load_num_channels
= 1 << log_split
;
1709 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1710 tmp
= LLVMConstInt(ctx
->i32
, i
, false);
1711 loads
[i
] = LLVMBuildExtractElement(ctx
->builder
, loaded
, tmp
, "");
1715 /* Further split dwords and shorts if required */
1716 if (log_recombine
< 0) {
1717 for (unsigned src
= load_num_channels
,
1718 dst
= load_num_channels
<< -log_recombine
;
1720 unsigned dst_bits
= 1 << (3 + load_log_size
+ log_recombine
);
1721 LLVMTypeRef dst_type
= LLVMIntTypeInContext(ctx
->context
, dst_bits
);
1722 LLVMValueRef loaded
= loads
[src
- 1];
1723 LLVMTypeRef loaded_type
= LLVMTypeOf(loaded
);
1724 for (unsigned i
= 1 << -log_recombine
; i
> 0; --i
, --dst
) {
1725 tmp
= LLVMConstInt(loaded_type
, dst_bits
* (i
- 1), false);
1726 tmp
= LLVMBuildLShr(ctx
->builder
, loaded
, tmp
, "");
1727 loads
[dst
- 1] = LLVMBuildTrunc(ctx
->builder
, tmp
, dst_type
, "");
1733 if (log_size
== 3) {
1734 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1735 for (unsigned i
= 0; i
< num_channels
; ++i
) {
1736 tmp
= ac_build_gather_values(ctx
, &loads
[2 * i
], 2);
1737 loads
[i
] = LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->f64
, "");
1739 } else if (format
== AC_FETCH_FORMAT_FIXED
) {
1740 /* 10_11_11_FLOAT */
1741 LLVMValueRef data
= loads
[0];
1742 LLVMValueRef i32_2047
= LLVMConstInt(ctx
->i32
, 2047, false);
1743 LLVMValueRef r
= LLVMBuildAnd(ctx
->builder
, data
, i32_2047
, "");
1744 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 11, false), "");
1745 LLVMValueRef g
= LLVMBuildAnd(ctx
->builder
, tmp
, i32_2047
, "");
1746 LLVMValueRef b
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 22, false), "");
1748 loads
[0] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, r
, 5, 6));
1749 loads
[1] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, g
, 5, 6));
1750 loads
[2] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, b
, 5, 5));
1754 format
= AC_FETCH_FORMAT_FLOAT
;
1756 /* 2_10_10_10 data formats */
1757 LLVMValueRef data
= loads
[0];
1758 LLVMTypeRef i10
= LLVMIntTypeInContext(ctx
->context
, 10);
1759 LLVMTypeRef i2
= LLVMIntTypeInContext(ctx
->context
, 2);
1760 loads
[0] = LLVMBuildTrunc(ctx
->builder
, data
, i10
, "");
1761 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 10, false), "");
1762 loads
[1] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1763 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 20, false), "");
1764 loads
[2] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1765 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 30, false), "");
1766 loads
[3] = LLVMBuildTrunc(ctx
->builder
, tmp
, i2
, "");
1772 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1773 if (log_size
!= 2) {
1774 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1775 tmp
= ac_to_float(ctx
, loads
[chan
]);
1777 tmp
= LLVMBuildFPTrunc(ctx
->builder
, tmp
, ctx
->f32
, "");
1778 else if (log_size
== 1)
1779 tmp
= LLVMBuildFPExt(ctx
->builder
, tmp
, ctx
->f32
, "");
1780 loads
[chan
] = ac_to_integer(ctx
, tmp
);
1783 } else if (format
== AC_FETCH_FORMAT_UINT
) {
1784 if (log_size
!= 2) {
1785 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1786 loads
[chan
] = LLVMBuildZExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1788 } else if (format
== AC_FETCH_FORMAT_SINT
) {
1789 if (log_size
!= 2) {
1790 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1791 loads
[chan
] = LLVMBuildSExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1794 bool unsign
= format
== AC_FETCH_FORMAT_UNORM
||
1795 format
== AC_FETCH_FORMAT_USCALED
||
1796 format
== AC_FETCH_FORMAT_UINT
;
1798 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1800 tmp
= LLVMBuildUIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1802 tmp
= LLVMBuildSIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1805 LLVMValueRef scale
= NULL
;
1806 if (format
== AC_FETCH_FORMAT_FIXED
) {
1807 assert(log_size
== 2);
1808 scale
= LLVMConstReal(ctx
->f32
, 1.0 / 0x10000);
1809 } else if (format
== AC_FETCH_FORMAT_UNORM
) {
1810 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1811 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << bits
) - 1));
1812 } else if (format
== AC_FETCH_FORMAT_SNORM
) {
1813 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1814 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << (bits
- 1)) - 1));
1817 tmp
= LLVMBuildFMul(ctx
->builder
, tmp
, scale
, "");
1819 if (format
== AC_FETCH_FORMAT_SNORM
) {
1820 /* Clamp to [-1, 1] */
1821 LLVMValueRef neg_one
= LLVMConstReal(ctx
->f32
, -1.0);
1822 LLVMValueRef clamp
=
1823 LLVMBuildFCmp(ctx
->builder
, LLVMRealULT
, tmp
, neg_one
, "");
1824 tmp
= LLVMBuildSelect(ctx
->builder
, clamp
, neg_one
, tmp
, "");
1827 loads
[chan
] = ac_to_integer(ctx
, tmp
);
1831 while (num_channels
< 4) {
1832 if (format
== AC_FETCH_FORMAT_UINT
|| format
== AC_FETCH_FORMAT_SINT
) {
1833 loads
[num_channels
] = num_channels
== 3 ? ctx
->i32_1
: ctx
->i32_0
;
1835 loads
[num_channels
] = ac_to_integer(ctx
, num_channels
== 3 ? ctx
->f32_1
: ctx
->f32_0
);
1842 loads
[0] = loads
[2];
1846 return ac_build_gather_values(ctx
, loads
, 4);
1850 ac_build_tbuffer_store(struct ac_llvm_context
*ctx
,
1853 LLVMValueRef vindex
,
1854 LLVMValueRef voffset
,
1855 LLVMValueRef soffset
,
1856 LLVMValueRef immoffset
,
1857 unsigned num_channels
,
1860 unsigned cache_policy
,
1863 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
? voffset
: ctx
->i32_0
,
1866 LLVMValueRef args
[7];
1868 args
[idx
++] = vdata
;
1869 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1871 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1872 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1873 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1874 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
->chip_class
, dfmt
, nfmt
), 0);
1875 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
1876 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
1877 const char *indexing_kind
= structurized
? "struct" : "raw";
1878 char name
[256], type_name
[8];
1880 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
1881 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1883 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.store.%s",
1884 indexing_kind
, type_name
);
1886 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
1887 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1891 ac_build_struct_tbuffer_store(struct ac_llvm_context
*ctx
,
1894 LLVMValueRef vindex
,
1895 LLVMValueRef voffset
,
1896 LLVMValueRef soffset
,
1897 LLVMValueRef immoffset
,
1898 unsigned num_channels
,
1901 unsigned cache_policy
)
1903 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, vindex
, voffset
, soffset
,
1904 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
1909 ac_build_raw_tbuffer_store(struct ac_llvm_context
*ctx
,
1912 LLVMValueRef voffset
,
1913 LLVMValueRef soffset
,
1914 LLVMValueRef immoffset
,
1915 unsigned num_channels
,
1918 unsigned cache_policy
)
1920 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, NULL
, voffset
, soffset
,
1921 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
1926 ac_build_tbuffer_store_short(struct ac_llvm_context
*ctx
,
1929 LLVMValueRef voffset
,
1930 LLVMValueRef soffset
,
1931 unsigned cache_policy
)
1933 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i16
, "");
1935 if (LLVM_VERSION_MAJOR
>= 9) {
1936 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1937 ac_build_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
1938 voffset
, soffset
, cache_policy
,
1941 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1942 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1944 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
1946 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1947 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
1952 ac_build_tbuffer_store_byte(struct ac_llvm_context
*ctx
,
1955 LLVMValueRef voffset
,
1956 LLVMValueRef soffset
,
1957 unsigned cache_policy
)
1959 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i8
, "");
1961 if (LLVM_VERSION_MAJOR
>= 9) {
1962 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1963 ac_build_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
1964 voffset
, soffset
, cache_policy
,
1967 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
1968 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1970 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
1972 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1973 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
1977 * Set range metadata on an instruction. This can only be used on load and
1978 * call instructions. If you know an instruction can only produce the values
1979 * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
1980 * \p lo is the minimum value inclusive.
1981 * \p hi is the maximum value exclusive.
1983 static void set_range_metadata(struct ac_llvm_context
*ctx
,
1984 LLVMValueRef value
, unsigned lo
, unsigned hi
)
1986 LLVMValueRef range_md
, md_args
[2];
1987 LLVMTypeRef type
= LLVMTypeOf(value
);
1988 LLVMContextRef context
= LLVMGetTypeContext(type
);
1990 md_args
[0] = LLVMConstInt(type
, lo
, false);
1991 md_args
[1] = LLVMConstInt(type
, hi
, false);
1992 range_md
= LLVMMDNodeInContext(context
, md_args
, 2);
1993 LLVMSetMetadata(value
, ctx
->range_md_kind
, range_md
);
1997 ac_get_thread_id(struct ac_llvm_context
*ctx
)
2001 LLVMValueRef tid_args
[2];
2002 tid_args
[0] = LLVMConstInt(ctx
->i32
, 0xffffffff, false);
2003 tid_args
[1] = ctx
->i32_0
;
2004 tid_args
[1] = ac_build_intrinsic(ctx
,
2005 "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
2006 tid_args
, 2, AC_FUNC_ATTR_READNONE
);
2008 if (ctx
->wave_size
== 32) {
2011 tid
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi",
2013 2, AC_FUNC_ATTR_READNONE
);
2015 set_range_metadata(ctx
, tid
, 0, ctx
->wave_size
);
2020 * AMD GCN implements derivatives using the local data store (LDS)
2021 * All writes to the LDS happen in all executing threads at
2022 * the same time. TID is the Thread ID for the current
2023 * thread and is a value between 0 and 63, representing
2024 * the thread's position in the wavefront.
2026 * For the pixel shader threads are grouped into quads of four pixels.
2027 * The TIDs of the pixels of a quad are:
2035 * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
2036 * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
2037 * the current pixel's column, and masking with 0xfffffffe yields the TID
2038 * of the left pixel of the current pixel's row.
2040 * Adding 1 yields the TID of the pixel to the right of the left pixel, and
2041 * adding 2 yields the TID of the pixel below the top pixel.
2044 ac_build_ddxy(struct ac_llvm_context
*ctx
,
2049 unsigned tl_lanes
[4], trbl_lanes
[4];
2050 char name
[32], type
[8];
2051 LLVMValueRef tl
, trbl
;
2052 LLVMTypeRef result_type
;
2053 LLVMValueRef result
;
2055 result_type
= ac_to_float_type(ctx
, LLVMTypeOf(val
));
2057 if (result_type
== ctx
->f16
)
2058 val
= LLVMBuildZExt(ctx
->builder
, val
, ctx
->i32
, "");
2059 else if (result_type
== ctx
->v2f16
)
2060 val
= LLVMBuildBitCast(ctx
->builder
, val
, ctx
->i32
, "");
2062 for (unsigned i
= 0; i
< 4; ++i
) {
2063 tl_lanes
[i
] = i
& mask
;
2064 trbl_lanes
[i
] = (i
& mask
) + idx
;
2067 tl
= ac_build_quad_swizzle(ctx
, val
,
2068 tl_lanes
[0], tl_lanes
[1],
2069 tl_lanes
[2], tl_lanes
[3]);
2070 trbl
= ac_build_quad_swizzle(ctx
, val
,
2071 trbl_lanes
[0], trbl_lanes
[1],
2072 trbl_lanes
[2], trbl_lanes
[3]);
2074 if (result_type
== ctx
->f16
) {
2075 tl
= LLVMBuildTrunc(ctx
->builder
, tl
, ctx
->i16
, "");
2076 trbl
= LLVMBuildTrunc(ctx
->builder
, trbl
, ctx
->i16
, "");
2079 tl
= LLVMBuildBitCast(ctx
->builder
, tl
, result_type
, "");
2080 trbl
= LLVMBuildBitCast(ctx
->builder
, trbl
, result_type
, "");
2081 result
= LLVMBuildFSub(ctx
->builder
, trbl
, tl
, "");
2083 ac_build_type_name_for_intr(result_type
, type
, sizeof(type
));
2084 snprintf(name
, sizeof(name
), "llvm.amdgcn.wqm.%s", type
);
2086 return ac_build_intrinsic(ctx
, name
, result_type
, &result
, 1, 0);
2090 ac_build_sendmsg(struct ac_llvm_context
*ctx
,
2092 LLVMValueRef wave_id
)
2094 LLVMValueRef args
[2];
2095 args
[0] = LLVMConstInt(ctx
->i32
, msg
, false);
2097 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.sendmsg", ctx
->voidt
, args
, 2, 0);
2101 ac_build_imsb(struct ac_llvm_context
*ctx
,
2103 LLVMTypeRef dst_type
)
2105 LLVMValueRef msb
= ac_build_intrinsic(ctx
, "llvm.amdgcn.sffbh.i32",
2107 AC_FUNC_ATTR_READNONE
);
2109 /* The HW returns the last bit index from MSB, but NIR/TGSI wants
2110 * the index from LSB. Invert it by doing "31 - msb". */
2111 msb
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, 31, false),
2114 LLVMValueRef all_ones
= LLVMConstInt(ctx
->i32
, -1, true);
2115 LLVMValueRef cond
= LLVMBuildOr(ctx
->builder
,
2116 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2117 arg
, ctx
->i32_0
, ""),
2118 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2119 arg
, all_ones
, ""), "");
2121 return LLVMBuildSelect(ctx
->builder
, cond
, all_ones
, msb
, "");
2125 ac_build_umsb(struct ac_llvm_context
*ctx
,
2127 LLVMTypeRef dst_type
)
2129 const char *intrin_name
;
2131 LLVMValueRef highest_bit
;
2135 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(arg
));
2138 intrin_name
= "llvm.ctlz.i64";
2140 highest_bit
= LLVMConstInt(ctx
->i64
, 63, false);
2144 intrin_name
= "llvm.ctlz.i32";
2146 highest_bit
= LLVMConstInt(ctx
->i32
, 31, false);
2150 intrin_name
= "llvm.ctlz.i16";
2152 highest_bit
= LLVMConstInt(ctx
->i16
, 15, false);
2156 intrin_name
= "llvm.ctlz.i8";
2158 highest_bit
= LLVMConstInt(ctx
->i8
, 7, false);
2162 unreachable(!"invalid bitsize");
2166 LLVMValueRef params
[2] = {
2171 LLVMValueRef msb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
2173 AC_FUNC_ATTR_READNONE
);
2175 /* The HW returns the last bit index from MSB, but TGSI/NIR wants
2176 * the index from LSB. Invert it by doing "31 - msb". */
2177 msb
= LLVMBuildSub(ctx
->builder
, highest_bit
, msb
, "");
2179 if (bitsize
== 64) {
2180 msb
= LLVMBuildTrunc(ctx
->builder
, msb
, ctx
->i32
, "");
2181 } else if (bitsize
< 32) {
2182 msb
= LLVMBuildSExt(ctx
->builder
, msb
, ctx
->i32
, "");
2185 /* check for zero */
2186 return LLVMBuildSelect(ctx
->builder
,
2187 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, arg
, zero
, ""),
2188 LLVMConstInt(ctx
->i32
, -1, true), msb
, "");
2191 LLVMValueRef
ac_build_fmin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2194 char name
[64], type
[64];
2196 ac_build_type_name_for_intr(LLVMTypeOf(a
), type
, sizeof(type
));
2197 snprintf(name
, sizeof(name
), "llvm.minnum.%s", type
);
2198 LLVMValueRef args
[2] = {a
, b
};
2199 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2200 AC_FUNC_ATTR_READNONE
);
2203 LLVMValueRef
ac_build_fmax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2206 char name
[64], type
[64];
2208 ac_build_type_name_for_intr(LLVMTypeOf(a
), type
, sizeof(type
));
2209 snprintf(name
, sizeof(name
), "llvm.maxnum.%s", type
);
2210 LLVMValueRef args
[2] = {a
, b
};
2211 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2212 AC_FUNC_ATTR_READNONE
);
2215 LLVMValueRef
ac_build_imin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2218 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSLE
, a
, b
, "");
2219 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2222 LLVMValueRef
ac_build_imax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2225 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, a
, b
, "");
2226 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2229 LLVMValueRef
ac_build_umin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2232 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntULE
, a
, b
, "");
2233 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2236 LLVMValueRef
ac_build_umax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2239 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, a
, b
, "");
2240 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2243 LLVMValueRef
ac_build_clamp(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
2245 LLVMTypeRef t
= LLVMTypeOf(value
);
2246 return ac_build_fmin(ctx
, ac_build_fmax(ctx
, value
, LLVMConstReal(t
, 0.0)),
2247 LLVMConstReal(t
, 1.0));
2250 void ac_build_export(struct ac_llvm_context
*ctx
, struct ac_export_args
*a
)
2252 LLVMValueRef args
[9];
2254 args
[0] = LLVMConstInt(ctx
->i32
, a
->target
, 0);
2255 args
[1] = LLVMConstInt(ctx
->i32
, a
->enabled_channels
, 0);
2258 args
[2] = LLVMBuildBitCast(ctx
->builder
, a
->out
[0],
2260 args
[3] = LLVMBuildBitCast(ctx
->builder
, a
->out
[1],
2262 args
[4] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2263 args
[5] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2265 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.compr.v2i16",
2266 ctx
->voidt
, args
, 6, 0);
2268 args
[2] = a
->out
[0];
2269 args
[3] = a
->out
[1];
2270 args
[4] = a
->out
[2];
2271 args
[5] = a
->out
[3];
2272 args
[6] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2273 args
[7] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2275 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.f32",
2276 ctx
->voidt
, args
, 8, 0);
2280 void ac_build_export_null(struct ac_llvm_context
*ctx
)
2282 struct ac_export_args args
;
2284 args
.enabled_channels
= 0x0; /* enabled channels */
2285 args
.valid_mask
= 1; /* whether the EXEC mask is valid */
2286 args
.done
= 1; /* DONE bit */
2287 args
.target
= V_008DFC_SQ_EXP_NULL
;
2288 args
.compr
= 0; /* COMPR flag (0 = 32-bit export) */
2289 args
.out
[0] = LLVMGetUndef(ctx
->f32
); /* R */
2290 args
.out
[1] = LLVMGetUndef(ctx
->f32
); /* G */
2291 args
.out
[2] = LLVMGetUndef(ctx
->f32
); /* B */
2292 args
.out
[3] = LLVMGetUndef(ctx
->f32
); /* A */
2294 ac_build_export(ctx
, &args
);
2297 static unsigned ac_num_coords(enum ac_image_dim dim
)
2303 case ac_image_1darray
:
2307 case ac_image_2darray
:
2308 case ac_image_2dmsaa
:
2310 case ac_image_2darraymsaa
:
2313 unreachable("ac_num_coords: bad dim");
2317 static unsigned ac_num_derivs(enum ac_image_dim dim
)
2321 case ac_image_1darray
:
2324 case ac_image_2darray
:
2329 case ac_image_2dmsaa
:
2330 case ac_image_2darraymsaa
:
2332 unreachable("derivatives not supported");
2336 static const char *get_atomic_name(enum ac_atomic_op op
)
2339 case ac_atomic_swap
: return "swap";
2340 case ac_atomic_add
: return "add";
2341 case ac_atomic_sub
: return "sub";
2342 case ac_atomic_smin
: return "smin";
2343 case ac_atomic_umin
: return "umin";
2344 case ac_atomic_smax
: return "smax";
2345 case ac_atomic_umax
: return "umax";
2346 case ac_atomic_and
: return "and";
2347 case ac_atomic_or
: return "or";
2348 case ac_atomic_xor
: return "xor";
2349 case ac_atomic_inc_wrap
: return "inc";
2350 case ac_atomic_dec_wrap
: return "dec";
2352 unreachable("bad atomic op");
2355 LLVMValueRef
ac_build_image_opcode(struct ac_llvm_context
*ctx
,
2356 struct ac_image_args
*a
)
2358 const char *overload
[3] = { "", "", "" };
2359 unsigned num_overloads
= 0;
2360 LLVMValueRef args
[18];
2361 unsigned num_args
= 0;
2362 enum ac_image_dim dim
= a
->dim
;
2364 assert(!a
->lod
|| a
->lod
== ctx
->i32_0
|| a
->lod
== ctx
->f32_0
||
2366 assert((a
->opcode
!= ac_image_get_resinfo
&& a
->opcode
!= ac_image_load_mip
&&
2367 a
->opcode
!= ac_image_store_mip
) ||
2369 assert(a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2370 (!a
->compare
&& !a
->offset
));
2371 assert((a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2372 a
->opcode
== ac_image_get_lod
) ||
2374 assert((a
->bias
? 1 : 0) +
2376 (a
->level_zero
? 1 : 0) +
2377 (a
->derivs
[0] ? 1 : 0) <= 1);
2378 assert((a
->min_lod
? 1 : 0) +
2380 (a
->level_zero
? 1 : 0) <= 1);
2381 assert(!a
->d16
|| (ctx
->chip_class
>= GFX8
&&
2382 a
->opcode
!= ac_image_atomic
&&
2383 a
->opcode
!= ac_image_atomic_cmpswap
&&
2384 a
->opcode
!= ac_image_get_lod
&&
2385 a
->opcode
!= ac_image_get_resinfo
));
2387 if (a
->opcode
== ac_image_get_lod
) {
2389 case ac_image_1darray
:
2392 case ac_image_2darray
:
2401 bool sample
= a
->opcode
== ac_image_sample
||
2402 a
->opcode
== ac_image_gather4
||
2403 a
->opcode
== ac_image_get_lod
;
2404 bool atomic
= a
->opcode
== ac_image_atomic
||
2405 a
->opcode
== ac_image_atomic_cmpswap
;
2406 bool load
= a
->opcode
== ac_image_sample
||
2407 a
->opcode
== ac_image_gather4
||
2408 a
->opcode
== ac_image_load
||
2409 a
->opcode
== ac_image_load_mip
;
2410 LLVMTypeRef coord_type
= sample
? ctx
->f32
: ctx
->i32
;
2412 if (atomic
|| a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
) {
2413 args
[num_args
++] = a
->data
[0];
2414 if (a
->opcode
== ac_image_atomic_cmpswap
)
2415 args
[num_args
++] = a
->data
[1];
2419 args
[num_args
++] = LLVMConstInt(ctx
->i32
, a
->dmask
, false);
2422 args
[num_args
++] = ac_to_integer(ctx
, a
->offset
);
2424 args
[num_args
++] = ac_to_float(ctx
, a
->bias
);
2425 overload
[num_overloads
++] = ".f32";
2428 args
[num_args
++] = ac_to_float(ctx
, a
->compare
);
2430 unsigned count
= ac_num_derivs(dim
);
2431 for (unsigned i
= 0; i
< count
; ++i
)
2432 args
[num_args
++] = ac_to_float(ctx
, a
->derivs
[i
]);
2433 overload
[num_overloads
++] = ".f32";
2435 unsigned num_coords
=
2436 a
->opcode
!= ac_image_get_resinfo
? ac_num_coords(dim
) : 0;
2437 for (unsigned i
= 0; i
< num_coords
; ++i
)
2438 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->coords
[i
], coord_type
, "");
2440 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->lod
, coord_type
, "");
2442 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->min_lod
, coord_type
, "");
2444 overload
[num_overloads
++] = sample
? ".f32" : ".i32";
2446 args
[num_args
++] = a
->resource
;
2448 args
[num_args
++] = a
->sampler
;
2449 args
[num_args
++] = LLVMConstInt(ctx
->i1
, a
->unorm
, false);
2452 args
[num_args
++] = ctx
->i32_0
; /* texfailctrl */
2453 args
[num_args
++] = LLVMConstInt(ctx
->i32
,
2454 load
? get_load_cache_policy(ctx
, a
->cache_policy
) :
2455 a
->cache_policy
, false);
2458 const char *atomic_subop
= "";
2459 switch (a
->opcode
) {
2460 case ac_image_sample
: name
= "sample"; break;
2461 case ac_image_gather4
: name
= "gather4"; break;
2462 case ac_image_load
: name
= "load"; break;
2463 case ac_image_load_mip
: name
= "load.mip"; break;
2464 case ac_image_store
: name
= "store"; break;
2465 case ac_image_store_mip
: name
= "store.mip"; break;
2466 case ac_image_atomic
:
2468 atomic_subop
= get_atomic_name(a
->atomic
);
2470 case ac_image_atomic_cmpswap
:
2472 atomic_subop
= "cmpswap";
2474 case ac_image_get_lod
: name
= "getlod"; break;
2475 case ac_image_get_resinfo
: name
= "getresinfo"; break;
2476 default: unreachable("invalid image opcode");
2479 const char *dimname
;
2481 case ac_image_1d
: dimname
= "1d"; break;
2482 case ac_image_2d
: dimname
= "2d"; break;
2483 case ac_image_3d
: dimname
= "3d"; break;
2484 case ac_image_cube
: dimname
= "cube"; break;
2485 case ac_image_1darray
: dimname
= "1darray"; break;
2486 case ac_image_2darray
: dimname
= "2darray"; break;
2487 case ac_image_2dmsaa
: dimname
= "2dmsaa"; break;
2488 case ac_image_2darraymsaa
: dimname
= "2darraymsaa"; break;
2489 default: unreachable("invalid dim");
2493 a
->lod
&& (a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
);
2495 snprintf(intr_name
, sizeof(intr_name
),
2496 "llvm.amdgcn.image.%s%s" /* base name */
2497 "%s%s%s%s" /* sample/gather modifiers */
2498 ".%s.%s%s%s%s", /* dimension and type overloads */
2500 a
->compare
? ".c" : "",
2503 a
->derivs
[0] ? ".d" :
2504 a
->level_zero
? ".lz" : "",
2505 a
->min_lod
? ".cl" : "",
2506 a
->offset
? ".o" : "",
2508 atomic
? "i32" : (a
->d16
? "v4f16" : "v4f32"),
2509 overload
[0], overload
[1], overload
[2]);
2514 else if (a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
)
2517 retty
= a
->d16
? ctx
->v4f16
: ctx
->v4f32
;
2519 LLVMValueRef result
=
2520 ac_build_intrinsic(ctx
, intr_name
, retty
, args
, num_args
,
2522 if (!sample
&& !atomic
&& retty
!= ctx
->voidt
)
2523 result
= ac_to_integer(ctx
, result
);
2528 LLVMValueRef
ac_build_image_get_sample_count(struct ac_llvm_context
*ctx
,
2531 LLVMValueRef samples
;
2533 /* Read the samples from the descriptor directly.
2534 * Hardware doesn't have any instruction for this.
2536 samples
= LLVMBuildExtractElement(ctx
->builder
, rsrc
,
2537 LLVMConstInt(ctx
->i32
, 3, 0), "");
2538 samples
= LLVMBuildLShr(ctx
->builder
, samples
,
2539 LLVMConstInt(ctx
->i32
, 16, 0), "");
2540 samples
= LLVMBuildAnd(ctx
->builder
, samples
,
2541 LLVMConstInt(ctx
->i32
, 0xf, 0), "");
2542 samples
= LLVMBuildShl(ctx
->builder
, ctx
->i32_1
,
2547 LLVMValueRef
ac_build_cvt_pkrtz_f16(struct ac_llvm_context
*ctx
,
2548 LLVMValueRef args
[2])
2550 return ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pkrtz", ctx
->v2f16
,
2551 args
, 2, AC_FUNC_ATTR_READNONE
);
2554 LLVMValueRef
ac_build_cvt_pknorm_i16(struct ac_llvm_context
*ctx
,
2555 LLVMValueRef args
[2])
2558 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.i16",
2559 ctx
->v2i16
, args
, 2,
2560 AC_FUNC_ATTR_READNONE
);
2561 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2564 LLVMValueRef
ac_build_cvt_pknorm_u16(struct ac_llvm_context
*ctx
,
2565 LLVMValueRef args
[2])
2568 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.u16",
2569 ctx
->v2i16
, args
, 2,
2570 AC_FUNC_ATTR_READNONE
);
2571 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2574 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2575 LLVMValueRef
ac_build_cvt_pk_i16(struct ac_llvm_context
*ctx
,
2576 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2578 assert(bits
== 8 || bits
== 10 || bits
== 16);
2580 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2581 bits
== 8 ? 127 : bits
== 10 ? 511 : 32767, 0);
2582 LLVMValueRef min_rgb
= LLVMConstInt(ctx
->i32
,
2583 bits
== 8 ? -128 : bits
== 10 ? -512 : -32768, 0);
2584 LLVMValueRef max_alpha
=
2585 bits
!= 10 ? max_rgb
: ctx
->i32_1
;
2586 LLVMValueRef min_alpha
=
2587 bits
!= 10 ? min_rgb
: LLVMConstInt(ctx
->i32
, -2, 0);
2591 for (int i
= 0; i
< 2; i
++) {
2592 bool alpha
= hi
&& i
== 1;
2593 args
[i
] = ac_build_imin(ctx
, args
[i
],
2594 alpha
? max_alpha
: max_rgb
);
2595 args
[i
] = ac_build_imax(ctx
, args
[i
],
2596 alpha
? min_alpha
: min_rgb
);
2601 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.i16",
2602 ctx
->v2i16
, args
, 2,
2603 AC_FUNC_ATTR_READNONE
);
2604 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2607 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2608 LLVMValueRef
ac_build_cvt_pk_u16(struct ac_llvm_context
*ctx
,
2609 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2611 assert(bits
== 8 || bits
== 10 || bits
== 16);
2613 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2614 bits
== 8 ? 255 : bits
== 10 ? 1023 : 65535, 0);
2615 LLVMValueRef max_alpha
=
2616 bits
!= 10 ? max_rgb
: LLVMConstInt(ctx
->i32
, 3, 0);
2620 for (int i
= 0; i
< 2; i
++) {
2621 bool alpha
= hi
&& i
== 1;
2622 args
[i
] = ac_build_umin(ctx
, args
[i
],
2623 alpha
? max_alpha
: max_rgb
);
2628 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.u16",
2629 ctx
->v2i16
, args
, 2,
2630 AC_FUNC_ATTR_READNONE
);
2631 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2634 LLVMValueRef
ac_build_wqm_vote(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2636 return ac_build_intrinsic(ctx
, "llvm.amdgcn.wqm.vote", ctx
->i1
,
2637 &i1
, 1, AC_FUNC_ATTR_READNONE
);
2640 void ac_build_kill_if_false(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2642 ac_build_intrinsic(ctx
, "llvm.amdgcn.kill", ctx
->voidt
,
2646 LLVMValueRef
ac_build_bfe(struct ac_llvm_context
*ctx
, LLVMValueRef input
,
2647 LLVMValueRef offset
, LLVMValueRef width
,
2650 LLVMValueRef args
[] = {
2656 return ac_build_intrinsic(ctx
, is_signed
? "llvm.amdgcn.sbfe.i32" :
2657 "llvm.amdgcn.ubfe.i32",
2658 ctx
->i32
, args
, 3, AC_FUNC_ATTR_READNONE
);
2662 LLVMValueRef
ac_build_imad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2663 LLVMValueRef s1
, LLVMValueRef s2
)
2665 return LLVMBuildAdd(ctx
->builder
,
2666 LLVMBuildMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2669 LLVMValueRef
ac_build_fmad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2670 LLVMValueRef s1
, LLVMValueRef s2
)
2672 /* FMA is better on GFX10, because it has FMA units instead of MUL-ADD units. */
2673 if (ctx
->chip_class
>= GFX10
) {
2674 return ac_build_intrinsic(ctx
, "llvm.fma.f32", ctx
->f32
,
2675 (LLVMValueRef
[]) {s0
, s1
, s2
}, 3,
2676 AC_FUNC_ATTR_READNONE
);
2679 return LLVMBuildFAdd(ctx
->builder
,
2680 LLVMBuildFMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2683 void ac_build_waitcnt(struct ac_llvm_context
*ctx
, unsigned wait_flags
)
2688 unsigned lgkmcnt
= 63;
2689 unsigned vmcnt
= ctx
->chip_class
>= GFX9
? 63 : 15;
2690 unsigned vscnt
= 63;
2692 if (wait_flags
& AC_WAIT_LGKM
)
2694 if (wait_flags
& AC_WAIT_VLOAD
)
2697 if (wait_flags
& AC_WAIT_VSTORE
) {
2698 if (ctx
->chip_class
>= GFX10
)
2704 /* There is no intrinsic for vscnt(0), so use a fence. */
2705 if ((wait_flags
& AC_WAIT_LGKM
&&
2706 wait_flags
& AC_WAIT_VLOAD
&&
2707 wait_flags
& AC_WAIT_VSTORE
) ||
2709 LLVMBuildFence(ctx
->builder
, LLVMAtomicOrderingRelease
, false, "");
2713 unsigned simm16
= (lgkmcnt
<< 8) |
2714 (7 << 4) | /* expcnt */
2716 ((vmcnt
>> 4) << 14);
2718 LLVMValueRef args
[1] = {
2719 LLVMConstInt(ctx
->i32
, simm16
, false),
2721 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.waitcnt",
2722 ctx
->voidt
, args
, 1, 0);
2725 LLVMValueRef
ac_build_fmed3(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2726 LLVMValueRef src1
, LLVMValueRef src2
,
2729 LLVMValueRef result
;
2731 if (bitsize
== 64 || (bitsize
== 16 && ctx
->chip_class
<= GFX8
)) {
2732 /* Lower 64-bit fmed because LLVM doesn't expose an intrinsic,
2733 * or lower 16-bit fmed because it's only supported on GFX9+.
2735 LLVMValueRef min1
, min2
, max1
;
2737 min1
= ac_build_fmin(ctx
, src0
, src1
);
2738 max1
= ac_build_fmax(ctx
, src0
, src1
);
2739 min2
= ac_build_fmin(ctx
, max1
, src2
);
2741 result
= ac_build_fmax(ctx
, min2
, min1
);
2746 if (bitsize
== 16) {
2747 intr
= "llvm.amdgcn.fmed3.f16";
2750 assert(bitsize
== 32);
2751 intr
= "llvm.amdgcn.fmed3.f32";
2755 LLVMValueRef params
[] = {
2761 result
= ac_build_intrinsic(ctx
, intr
, type
, params
, 3,
2762 AC_FUNC_ATTR_READNONE
);
2765 if (ctx
->chip_class
< GFX9
&& bitsize
== 32) {
2766 /* Only pre-GFX9 chips do not flush denorms. */
2767 result
= ac_build_canonicalize(ctx
, result
, bitsize
);
2773 LLVMValueRef
ac_build_fract(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2779 if (bitsize
== 16) {
2780 intr
= "llvm.amdgcn.fract.f16";
2782 } else if (bitsize
== 32) {
2783 intr
= "llvm.amdgcn.fract.f32";
2786 intr
= "llvm.amdgcn.fract.f64";
2790 LLVMValueRef params
[] = {
2793 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
2794 AC_FUNC_ATTR_READNONE
);
2797 LLVMValueRef
ac_build_isign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2800 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->context
, bitsize
);
2801 LLVMValueRef zero
= LLVMConstInt(type
, 0, false);
2802 LLVMValueRef one
= LLVMConstInt(type
, 1, false);
2804 LLVMValueRef cmp
, val
;
2805 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, src0
, zero
, "");
2806 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2807 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGE
, val
, zero
, "");
2808 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstInt(type
, -1, true), "");
2812 LLVMValueRef
ac_build_fsign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2815 LLVMValueRef cmp
, val
, zero
, one
;
2818 if (bitsize
== 16) {
2822 } else if (bitsize
== 32) {
2832 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGT
, src0
, zero
, "");
2833 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2834 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGE
, val
, zero
, "");
2835 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstReal(type
, -1.0), "");
2839 LLVMValueRef
ac_build_bit_count(struct ac_llvm_context
*ctx
, LLVMValueRef src0
)
2841 LLVMValueRef result
;
2844 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2848 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i128", ctx
->i128
,
2849 (LLVMValueRef
[]) { src0
}, 1,
2850 AC_FUNC_ATTR_READNONE
);
2851 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2854 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i64", ctx
->i64
,
2855 (LLVMValueRef
[]) { src0
}, 1,
2856 AC_FUNC_ATTR_READNONE
);
2858 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2861 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i32", ctx
->i32
,
2862 (LLVMValueRef
[]) { src0
}, 1,
2863 AC_FUNC_ATTR_READNONE
);
2866 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i16", ctx
->i16
,
2867 (LLVMValueRef
[]) { src0
}, 1,
2868 AC_FUNC_ATTR_READNONE
);
2870 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2873 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i8", ctx
->i8
,
2874 (LLVMValueRef
[]) { src0
}, 1,
2875 AC_FUNC_ATTR_READNONE
);
2877 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2880 unreachable(!"invalid bitsize");
2887 LLVMValueRef
ac_build_bitfield_reverse(struct ac_llvm_context
*ctx
,
2890 LLVMValueRef result
;
2893 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2897 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i64", ctx
->i64
,
2898 (LLVMValueRef
[]) { src0
}, 1,
2899 AC_FUNC_ATTR_READNONE
);
2901 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2904 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i32", ctx
->i32
,
2905 (LLVMValueRef
[]) { src0
}, 1,
2906 AC_FUNC_ATTR_READNONE
);
2909 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i16", ctx
->i16
,
2910 (LLVMValueRef
[]) { src0
}, 1,
2911 AC_FUNC_ATTR_READNONE
);
2913 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2916 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i8", ctx
->i8
,
2917 (LLVMValueRef
[]) { src0
}, 1,
2918 AC_FUNC_ATTR_READNONE
);
2920 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2923 unreachable(!"invalid bitsize");
2930 #define AC_EXP_TARGET 0
2931 #define AC_EXP_ENABLED_CHANNELS 1
2932 #define AC_EXP_OUT0 2
2940 struct ac_vs_exp_chan
2944 enum ac_ir_type type
;
2947 struct ac_vs_exp_inst
{
2950 struct ac_vs_exp_chan chan
[4];
2953 struct ac_vs_exports
{
2955 struct ac_vs_exp_inst exp
[VARYING_SLOT_MAX
];
2958 /* Return true if the PARAM export has been eliminated. */
2959 static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset
,
2960 uint32_t num_outputs
,
2961 struct ac_vs_exp_inst
*exp
)
2963 unsigned i
, default_val
; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */
2964 bool is_zero
[4] = {}, is_one
[4] = {};
2966 for (i
= 0; i
< 4; i
++) {
2967 /* It's a constant expression. Undef outputs are eliminated too. */
2968 if (exp
->chan
[i
].type
== AC_IR_UNDEF
) {
2971 } else if (exp
->chan
[i
].type
== AC_IR_CONST
) {
2972 if (exp
->chan
[i
].const_float
== 0)
2974 else if (exp
->chan
[i
].const_float
== 1)
2977 return false; /* other constant */
2982 /* Only certain combinations of 0 and 1 can be eliminated. */
2983 if (is_zero
[0] && is_zero
[1] && is_zero
[2])
2984 default_val
= is_zero
[3] ? 0 : 1;
2985 else if (is_one
[0] && is_one
[1] && is_one
[2])
2986 default_val
= is_zero
[3] ? 2 : 3;
2990 /* The PARAM export can be represented as DEFAULT_VAL. Kill it. */
2991 LLVMInstructionEraseFromParent(exp
->inst
);
2993 /* Change OFFSET to DEFAULT_VAL. */
2994 for (i
= 0; i
< num_outputs
; i
++) {
2995 if (vs_output_param_offset
[i
] == exp
->offset
) {
2996 vs_output_param_offset
[i
] =
2997 AC_EXP_PARAM_DEFAULT_VAL_0000
+ default_val
;
3004 static bool ac_eliminate_duplicated_output(struct ac_llvm_context
*ctx
,
3005 uint8_t *vs_output_param_offset
,
3006 uint32_t num_outputs
,
3007 struct ac_vs_exports
*processed
,
3008 struct ac_vs_exp_inst
*exp
)
3010 unsigned p
, copy_back_channels
= 0;
3012 /* See if the output is already in the list of processed outputs.
3013 * The LLVMValueRef comparison relies on SSA.
3015 for (p
= 0; p
< processed
->num
; p
++) {
3016 bool different
= false;
3018 for (unsigned j
= 0; j
< 4; j
++) {
3019 struct ac_vs_exp_chan
*c1
= &processed
->exp
[p
].chan
[j
];
3020 struct ac_vs_exp_chan
*c2
= &exp
->chan
[j
];
3022 /* Treat undef as a match. */
3023 if (c2
->type
== AC_IR_UNDEF
)
3026 /* If c1 is undef but c2 isn't, we can copy c2 to c1
3027 * and consider the instruction duplicated.
3029 if (c1
->type
== AC_IR_UNDEF
) {
3030 copy_back_channels
|= 1 << j
;
3034 /* Test whether the channels are not equal. */
3035 if (c1
->type
!= c2
->type
||
3036 (c1
->type
== AC_IR_CONST
&&
3037 c1
->const_float
!= c2
->const_float
) ||
3038 (c1
->type
== AC_IR_VALUE
&&
3039 c1
->value
!= c2
->value
)) {
3047 copy_back_channels
= 0;
3049 if (p
== processed
->num
)
3052 /* If a match was found, but the matching export has undef where the new
3053 * one has a normal value, copy the normal value to the undef channel.
3055 struct ac_vs_exp_inst
*match
= &processed
->exp
[p
];
3057 /* Get current enabled channels mask. */
3058 LLVMValueRef arg
= LLVMGetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
);
3059 unsigned enabled_channels
= LLVMConstIntGetZExtValue(arg
);
3061 while (copy_back_channels
) {
3062 unsigned chan
= u_bit_scan(©_back_channels
);
3064 assert(match
->chan
[chan
].type
== AC_IR_UNDEF
);
3065 LLVMSetOperand(match
->inst
, AC_EXP_OUT0
+ chan
,
3066 exp
->chan
[chan
].value
);
3067 match
->chan
[chan
] = exp
->chan
[chan
];
3069 /* Update number of enabled channels because the original mask
3070 * is not always 0xf.
3072 enabled_channels
|= (1 << chan
);
3073 LLVMSetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
,
3074 LLVMConstInt(ctx
->i32
, enabled_channels
, 0));
3077 /* The PARAM export is duplicated. Kill it. */
3078 LLVMInstructionEraseFromParent(exp
->inst
);
3080 /* Change OFFSET to the matching export. */
3081 for (unsigned i
= 0; i
< num_outputs
; i
++) {
3082 if (vs_output_param_offset
[i
] == exp
->offset
) {
3083 vs_output_param_offset
[i
] = match
->offset
;
3090 void ac_optimize_vs_outputs(struct ac_llvm_context
*ctx
,
3091 LLVMValueRef main_fn
,
3092 uint8_t *vs_output_param_offset
,
3093 uint32_t num_outputs
,
3094 uint32_t skip_output_mask
,
3095 uint8_t *num_param_exports
)
3097 LLVMBasicBlockRef bb
;
3098 bool removed_any
= false;
3099 struct ac_vs_exports exports
;
3103 /* Process all LLVM instructions. */
3104 bb
= LLVMGetFirstBasicBlock(main_fn
);
3106 LLVMValueRef inst
= LLVMGetFirstInstruction(bb
);
3109 LLVMValueRef cur
= inst
;
3110 inst
= LLVMGetNextInstruction(inst
);
3111 struct ac_vs_exp_inst exp
;
3113 if (LLVMGetInstructionOpcode(cur
) != LLVMCall
)
3116 LLVMValueRef callee
= ac_llvm_get_called_value(cur
);
3118 if (!ac_llvm_is_function(callee
))
3121 const char *name
= LLVMGetValueName(callee
);
3122 unsigned num_args
= LLVMCountParams(callee
);
3124 /* Check if this is an export instruction. */
3125 if ((num_args
!= 9 && num_args
!= 8) ||
3126 (strcmp(name
, "llvm.SI.export") &&
3127 strcmp(name
, "llvm.amdgcn.exp.f32")))
3130 LLVMValueRef arg
= LLVMGetOperand(cur
, AC_EXP_TARGET
);
3131 unsigned target
= LLVMConstIntGetZExtValue(arg
);
3133 if (target
< V_008DFC_SQ_EXP_PARAM
)
3136 target
-= V_008DFC_SQ_EXP_PARAM
;
3138 /* Parse the instruction. */
3139 memset(&exp
, 0, sizeof(exp
));
3140 exp
.offset
= target
;
3143 for (unsigned i
= 0; i
< 4; i
++) {
3144 LLVMValueRef v
= LLVMGetOperand(cur
, AC_EXP_OUT0
+ i
);
3146 exp
.chan
[i
].value
= v
;
3148 if (LLVMIsUndef(v
)) {
3149 exp
.chan
[i
].type
= AC_IR_UNDEF
;
3150 } else if (LLVMIsAConstantFP(v
)) {
3151 LLVMBool loses_info
;
3152 exp
.chan
[i
].type
= AC_IR_CONST
;
3153 exp
.chan
[i
].const_float
=
3154 LLVMConstRealGetDouble(v
, &loses_info
);
3156 exp
.chan
[i
].type
= AC_IR_VALUE
;
3160 /* Eliminate constant and duplicated PARAM exports. */
3161 if (!((1u << target
) & skip_output_mask
) &&
3162 (ac_eliminate_const_output(vs_output_param_offset
,
3163 num_outputs
, &exp
) ||
3164 ac_eliminate_duplicated_output(ctx
,
3165 vs_output_param_offset
,
3166 num_outputs
, &exports
,
3170 exports
.exp
[exports
.num
++] = exp
;
3173 bb
= LLVMGetNextBasicBlock(bb
);
3176 /* Remove holes in export memory due to removed PARAM exports.
3177 * This is done by renumbering all PARAM exports.
3180 uint8_t old_offset
[VARYING_SLOT_MAX
];
3183 /* Make a copy of the offsets. We need the old version while
3184 * we are modifying some of them. */
3185 memcpy(old_offset
, vs_output_param_offset
,
3186 sizeof(old_offset
));
3188 for (i
= 0; i
< exports
.num
; i
++) {
3189 unsigned offset
= exports
.exp
[i
].offset
;
3191 /* Update vs_output_param_offset. Multiple outputs can
3192 * have the same offset.
3194 for (out
= 0; out
< num_outputs
; out
++) {
3195 if (old_offset
[out
] == offset
)
3196 vs_output_param_offset
[out
] = i
;
3199 /* Change the PARAM offset in the instruction. */
3200 LLVMSetOperand(exports
.exp
[i
].inst
, AC_EXP_TARGET
,
3201 LLVMConstInt(ctx
->i32
,
3202 V_008DFC_SQ_EXP_PARAM
+ i
, 0));
3204 *num_param_exports
= exports
.num
;
3208 void ac_init_exec_full_mask(struct ac_llvm_context
*ctx
)
3210 LLVMValueRef full_mask
= LLVMConstInt(ctx
->i64
, ~0ull, 0);
3211 ac_build_intrinsic(ctx
,
3212 "llvm.amdgcn.init.exec", ctx
->voidt
,
3213 &full_mask
, 1, AC_FUNC_ATTR_CONVERGENT
);
3216 void ac_declare_lds_as_pointer(struct ac_llvm_context
*ctx
)
3218 unsigned lds_size
= ctx
->chip_class
>= GFX7
? 65536 : 32768;
3219 ctx
->lds
= LLVMBuildIntToPtr(ctx
->builder
, ctx
->i32_0
,
3220 LLVMPointerType(LLVMArrayType(ctx
->i32
, lds_size
/ 4), AC_ADDR_SPACE_LDS
),
3224 LLVMValueRef
ac_lds_load(struct ac_llvm_context
*ctx
,
3225 LLVMValueRef dw_addr
)
3227 return LLVMBuildLoad(ctx
->builder
, ac_build_gep0(ctx
, ctx
->lds
, dw_addr
), "");
3230 void ac_lds_store(struct ac_llvm_context
*ctx
,
3231 LLVMValueRef dw_addr
,
3234 value
= ac_to_integer(ctx
, value
);
3235 ac_build_indexed_store(ctx
, ctx
->lds
,
3239 LLVMValueRef
ac_find_lsb(struct ac_llvm_context
*ctx
,
3240 LLVMTypeRef dst_type
,
3243 unsigned src0_bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
3244 const char *intrin_name
;
3248 switch (src0_bitsize
) {
3250 intrin_name
= "llvm.cttz.i64";
3255 intrin_name
= "llvm.cttz.i32";
3260 intrin_name
= "llvm.cttz.i16";
3265 intrin_name
= "llvm.cttz.i8";
3270 unreachable(!"invalid bitsize");
3273 LLVMValueRef params
[2] = {
3276 /* The value of 1 means that ffs(x=0) = undef, so LLVM won't
3277 * add special code to check for x=0. The reason is that
3278 * the LLVM behavior for x=0 is different from what we
3279 * need here. However, LLVM also assumes that ffs(x) is
3280 * in [0, 31], but GLSL expects that ffs(0) = -1, so
3281 * a conditional assignment to handle 0 is still required.
3283 * The hardware already implements the correct behavior.
3288 LLVMValueRef lsb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
3290 AC_FUNC_ATTR_READNONE
);
3292 if (src0_bitsize
== 64) {
3293 lsb
= LLVMBuildTrunc(ctx
->builder
, lsb
, ctx
->i32
, "");
3294 } else if (src0_bitsize
< 32) {
3295 lsb
= LLVMBuildSExt(ctx
->builder
, lsb
, ctx
->i32
, "");
3298 /* TODO: We need an intrinsic to skip this conditional. */
3299 /* Check for zero: */
3300 return LLVMBuildSelect(ctx
->builder
, LLVMBuildICmp(ctx
->builder
,
3303 LLVMConstInt(ctx
->i32
, -1, 0), lsb
, "");
3306 LLVMTypeRef
ac_array_in_const_addr_space(LLVMTypeRef elem_type
)
3308 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST
);
3311 LLVMTypeRef
ac_array_in_const32_addr_space(LLVMTypeRef elem_type
)
3313 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST_32BIT
);
3316 static struct ac_llvm_flow
*
3317 get_current_flow(struct ac_llvm_context
*ctx
)
3319 if (ctx
->flow
->depth
> 0)
3320 return &ctx
->flow
->stack
[ctx
->flow
->depth
- 1];
3324 static struct ac_llvm_flow
*
3325 get_innermost_loop(struct ac_llvm_context
*ctx
)
3327 for (unsigned i
= ctx
->flow
->depth
; i
> 0; --i
) {
3328 if (ctx
->flow
->stack
[i
- 1].loop_entry_block
)
3329 return &ctx
->flow
->stack
[i
- 1];
3334 static struct ac_llvm_flow
*
3335 push_flow(struct ac_llvm_context
*ctx
)
3337 struct ac_llvm_flow
*flow
;
3339 if (ctx
->flow
->depth
>= ctx
->flow
->depth_max
) {
3340 unsigned new_max
= MAX2(ctx
->flow
->depth
<< 1,
3341 AC_LLVM_INITIAL_CF_DEPTH
);
3343 ctx
->flow
->stack
= realloc(ctx
->flow
->stack
, new_max
* sizeof(*ctx
->flow
->stack
));
3344 ctx
->flow
->depth_max
= new_max
;
3347 flow
= &ctx
->flow
->stack
[ctx
->flow
->depth
];
3350 flow
->next_block
= NULL
;
3351 flow
->loop_entry_block
= NULL
;
3355 static void set_basicblock_name(LLVMBasicBlockRef bb
, const char *base
,
3359 snprintf(buf
, sizeof(buf
), "%s%d", base
, label_id
);
3360 LLVMSetValueName(LLVMBasicBlockAsValue(bb
), buf
);
3363 /* Append a basic block at the level of the parent flow.
3365 static LLVMBasicBlockRef
append_basic_block(struct ac_llvm_context
*ctx
,
3368 assert(ctx
->flow
->depth
>= 1);
3370 if (ctx
->flow
->depth
>= 2) {
3371 struct ac_llvm_flow
*flow
= &ctx
->flow
->stack
[ctx
->flow
->depth
- 2];
3373 return LLVMInsertBasicBlockInContext(ctx
->context
,
3374 flow
->next_block
, name
);
3377 LLVMValueRef main_fn
=
3378 LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx
->builder
));
3379 return LLVMAppendBasicBlockInContext(ctx
->context
, main_fn
, name
);
3382 /* Emit a branch to the given default target for the current block if
3383 * applicable -- that is, if the current block does not already contain a
3384 * branch from a break or continue.
3386 static void emit_default_branch(LLVMBuilderRef builder
,
3387 LLVMBasicBlockRef target
)
3389 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder
)))
3390 LLVMBuildBr(builder
, target
);
3393 void ac_build_bgnloop(struct ac_llvm_context
*ctx
, int label_id
)
3395 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3396 flow
->loop_entry_block
= append_basic_block(ctx
, "LOOP");
3397 flow
->next_block
= append_basic_block(ctx
, "ENDLOOP");
3398 set_basicblock_name(flow
->loop_entry_block
, "loop", label_id
);
3399 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3400 LLVMPositionBuilderAtEnd(ctx
->builder
, flow
->loop_entry_block
);
3403 void ac_build_break(struct ac_llvm_context
*ctx
)
3405 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3406 LLVMBuildBr(ctx
->builder
, flow
->next_block
);
3409 void ac_build_continue(struct ac_llvm_context
*ctx
)
3411 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3412 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3415 void ac_build_else(struct ac_llvm_context
*ctx
, int label_id
)
3417 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3418 LLVMBasicBlockRef endif_block
;
3420 assert(!current_branch
->loop_entry_block
);
3422 endif_block
= append_basic_block(ctx
, "ENDIF");
3423 emit_default_branch(ctx
->builder
, endif_block
);
3425 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3426 set_basicblock_name(current_branch
->next_block
, "else", label_id
);
3428 current_branch
->next_block
= endif_block
;
3431 void ac_build_endif(struct ac_llvm_context
*ctx
, int label_id
)
3433 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3435 assert(!current_branch
->loop_entry_block
);
3437 emit_default_branch(ctx
->builder
, current_branch
->next_block
);
3438 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3439 set_basicblock_name(current_branch
->next_block
, "endif", label_id
);
3444 void ac_build_endloop(struct ac_llvm_context
*ctx
, int label_id
)
3446 struct ac_llvm_flow
*current_loop
= get_current_flow(ctx
);
3448 assert(current_loop
->loop_entry_block
);
3450 emit_default_branch(ctx
->builder
, current_loop
->loop_entry_block
);
3452 LLVMPositionBuilderAtEnd(ctx
->builder
, current_loop
->next_block
);
3453 set_basicblock_name(current_loop
->next_block
, "endloop", label_id
);
3457 void ac_build_ifcc(struct ac_llvm_context
*ctx
, LLVMValueRef cond
, int label_id
)
3459 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3460 LLVMBasicBlockRef if_block
;
3462 if_block
= append_basic_block(ctx
, "IF");
3463 flow
->next_block
= append_basic_block(ctx
, "ELSE");
3464 set_basicblock_name(if_block
, "if", label_id
);
3465 LLVMBuildCondBr(ctx
->builder
, cond
, if_block
, flow
->next_block
);
3466 LLVMPositionBuilderAtEnd(ctx
->builder
, if_block
);
3469 void ac_build_if(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3472 LLVMValueRef cond
= LLVMBuildFCmp(ctx
->builder
, LLVMRealUNE
,
3473 value
, ctx
->f32_0
, "");
3474 ac_build_ifcc(ctx
, cond
, label_id
);
3477 void ac_build_uif(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3480 LLVMValueRef cond
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
3481 ac_to_integer(ctx
, value
),
3483 ac_build_ifcc(ctx
, cond
, label_id
);
3486 LLVMValueRef
ac_build_alloca_undef(struct ac_llvm_context
*ac
, LLVMTypeRef type
,
3489 LLVMBuilderRef builder
= ac
->builder
;
3490 LLVMBasicBlockRef current_block
= LLVMGetInsertBlock(builder
);
3491 LLVMValueRef function
= LLVMGetBasicBlockParent(current_block
);
3492 LLVMBasicBlockRef first_block
= LLVMGetEntryBasicBlock(function
);
3493 LLVMValueRef first_instr
= LLVMGetFirstInstruction(first_block
);
3494 LLVMBuilderRef first_builder
= LLVMCreateBuilderInContext(ac
->context
);
3498 LLVMPositionBuilderBefore(first_builder
, first_instr
);
3500 LLVMPositionBuilderAtEnd(first_builder
, first_block
);
3503 res
= LLVMBuildAlloca(first_builder
, type
, name
);
3504 LLVMDisposeBuilder(first_builder
);
3508 LLVMValueRef
ac_build_alloca(struct ac_llvm_context
*ac
,
3509 LLVMTypeRef type
, const char *name
)
3511 LLVMValueRef ptr
= ac_build_alloca_undef(ac
, type
, name
);
3512 LLVMBuildStore(ac
->builder
, LLVMConstNull(type
), ptr
);
3516 LLVMValueRef
ac_cast_ptr(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
3519 int addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
3520 return LLVMBuildBitCast(ctx
->builder
, ptr
,
3521 LLVMPointerType(type
, addr_space
), "");
3524 LLVMValueRef
ac_trim_vector(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3527 unsigned num_components
= ac_get_llvm_num_components(value
);
3528 if (count
== num_components
)
3531 LLVMValueRef masks
[MAX2(count
, 2)];
3532 masks
[0] = ctx
->i32_0
;
3533 masks
[1] = ctx
->i32_1
;
3534 for (unsigned i
= 2; i
< count
; i
++)
3535 masks
[i
] = LLVMConstInt(ctx
->i32
, i
, false);
3538 return LLVMBuildExtractElement(ctx
->builder
, value
, masks
[0],
3541 LLVMValueRef swizzle
= LLVMConstVector(masks
, count
);
3542 return LLVMBuildShuffleVector(ctx
->builder
, value
, value
, swizzle
, "");
3545 LLVMValueRef
ac_unpack_param(struct ac_llvm_context
*ctx
, LLVMValueRef param
,
3546 unsigned rshift
, unsigned bitwidth
)
3548 LLVMValueRef value
= param
;
3550 value
= LLVMBuildLShr(ctx
->builder
, value
,
3551 LLVMConstInt(ctx
->i32
, rshift
, false), "");
3553 if (rshift
+ bitwidth
< 32) {
3554 unsigned mask
= (1 << bitwidth
) - 1;
3555 value
= LLVMBuildAnd(ctx
->builder
, value
,
3556 LLVMConstInt(ctx
->i32
, mask
, false), "");
3561 /* Adjust the sample index according to FMASK.
3563 * For uncompressed MSAA surfaces, FMASK should return 0x76543210,
3564 * which is the identity mapping. Each nibble says which physical sample
3565 * should be fetched to get that sample.
3567 * For example, 0x11111100 means there are only 2 samples stored and
3568 * the second sample covers 3/4 of the pixel. When reading samples 0
3569 * and 1, return physical sample 0 (determined by the first two 0s
3570 * in FMASK), otherwise return physical sample 1.
3572 * The sample index should be adjusted as follows:
3573 * addr[sample_index] = (fmask >> (addr[sample_index] * 4)) & 0xF;
3575 void ac_apply_fmask_to_sample(struct ac_llvm_context
*ac
, LLVMValueRef fmask
,
3576 LLVMValueRef
*addr
, bool is_array_tex
)
3578 struct ac_image_args fmask_load
= {};
3579 fmask_load
.opcode
= ac_image_load
;
3580 fmask_load
.resource
= fmask
;
3581 fmask_load
.dmask
= 0xf;
3582 fmask_load
.dim
= is_array_tex
? ac_image_2darray
: ac_image_2d
;
3583 fmask_load
.attributes
= AC_FUNC_ATTR_READNONE
;
3585 fmask_load
.coords
[0] = addr
[0];
3586 fmask_load
.coords
[1] = addr
[1];
3588 fmask_load
.coords
[2] = addr
[2];
3590 LLVMValueRef fmask_value
= ac_build_image_opcode(ac
, &fmask_load
);
3591 fmask_value
= LLVMBuildExtractElement(ac
->builder
, fmask_value
,
3594 /* Apply the formula. */
3595 unsigned sample_chan
= is_array_tex
? 3 : 2;
3596 LLVMValueRef final_sample
;
3597 final_sample
= LLVMBuildMul(ac
->builder
, addr
[sample_chan
],
3598 LLVMConstInt(ac
->i32
, 4, 0), "");
3599 final_sample
= LLVMBuildLShr(ac
->builder
, fmask_value
, final_sample
, "");
3600 /* Mask the sample index by 0x7, because 0x8 means an unknown value
3601 * with EQAA, so those will map to 0. */
3602 final_sample
= LLVMBuildAnd(ac
->builder
, final_sample
,
3603 LLVMConstInt(ac
->i32
, 0x7, 0), "");
3605 /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK
3606 * resource descriptor is 0 (invalid).
3609 tmp
= LLVMBuildBitCast(ac
->builder
, fmask
, ac
->v8i32
, "");
3610 tmp
= LLVMBuildExtractElement(ac
->builder
, tmp
, ac
->i32_1
, "");
3611 tmp
= LLVMBuildICmp(ac
->builder
, LLVMIntNE
, tmp
, ac
->i32_0
, "");
3613 /* Replace the MSAA sample index. */
3614 addr
[sample_chan
] = LLVMBuildSelect(ac
->builder
, tmp
, final_sample
,
3615 addr
[sample_chan
], "");
3619 _ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
3620 LLVMValueRef lane
, bool with_opt_barrier
)
3622 LLVMTypeRef type
= LLVMTypeOf(src
);
3623 LLVMValueRef result
;
3625 if (with_opt_barrier
)
3626 ac_build_optimization_barrier(ctx
, &src
);
3628 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3630 lane
= LLVMBuildZExt(ctx
->builder
, lane
, ctx
->i32
, "");
3632 result
= ac_build_intrinsic(ctx
,
3633 lane
== NULL
? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane",
3634 ctx
->i32
, (LLVMValueRef
[]) { src
, lane
},
3635 lane
== NULL
? 1 : 2,
3636 AC_FUNC_ATTR_READNONE
|
3637 AC_FUNC_ATTR_CONVERGENT
);
3639 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
3643 ac_build_readlane_common(struct ac_llvm_context
*ctx
,
3644 LLVMValueRef src
, LLVMValueRef lane
,
3645 bool with_opt_barrier
)
3647 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3648 src
= ac_to_integer(ctx
, src
);
3649 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3653 assert(bits
% 32 == 0);
3654 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3655 LLVMValueRef src_vector
=
3656 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3657 ret
= LLVMGetUndef(vec_type
);
3658 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3659 LLVMValueRef ret_comp
;
3661 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3662 LLVMConstInt(ctx
->i32
, i
, 0), "");
3664 ret_comp
= _ac_build_readlane(ctx
, src
, lane
,
3667 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
, ret_comp
,
3668 LLVMConstInt(ctx
->i32
, i
, 0), "");
3671 ret
= _ac_build_readlane(ctx
, src
, lane
, with_opt_barrier
);
3674 if (LLVMGetTypeKind(src_type
) == LLVMPointerTypeKind
)
3675 return LLVMBuildIntToPtr(ctx
->builder
, ret
, src_type
, "");
3676 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3680 * Builds the "llvm.amdgcn.readlane" or "llvm.amdgcn.readfirstlane" intrinsic.
3682 * The optimization barrier is not needed if the value is the same in all lanes
3683 * or if this is called in the outermost block.
3687 * @param lane - id of the lane or NULL for the first active lane
3688 * @return value of the lane
3690 LLVMValueRef
ac_build_readlane_no_opt_barrier(struct ac_llvm_context
*ctx
,
3691 LLVMValueRef src
, LLVMValueRef lane
)
3693 return ac_build_readlane_common(ctx
, src
, lane
, false);
3698 ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
3700 return ac_build_readlane_common(ctx
, src
, lane
, true);
3704 ac_build_writelane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef value
, LLVMValueRef lane
)
3706 return ac_build_intrinsic(ctx
, "llvm.amdgcn.writelane", ctx
->i32
,
3707 (LLVMValueRef
[]) {value
, lane
, src
}, 3,
3708 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3712 ac_build_mbcnt(struct ac_llvm_context
*ctx
, LLVMValueRef mask
)
3714 if (ctx
->wave_size
== 32) {
3715 return ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
3716 (LLVMValueRef
[]) { mask
, ctx
->i32_0
},
3717 2, AC_FUNC_ATTR_READNONE
);
3719 LLVMValueRef mask_vec
= LLVMBuildBitCast(ctx
->builder
, mask
, ctx
->v2i32
, "");
3720 LLVMValueRef mask_lo
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3722 LLVMValueRef mask_hi
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3725 ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
3726 (LLVMValueRef
[]) { mask_lo
, ctx
->i32_0
},
3727 2, AC_FUNC_ATTR_READNONE
);
3728 val
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi", ctx
->i32
,
3729 (LLVMValueRef
[]) { mask_hi
, val
},
3730 2, AC_FUNC_ATTR_READNONE
);
3735 _dpp_quad_perm
= 0x000,
3736 _dpp_row_sl
= 0x100,
3737 _dpp_row_sr
= 0x110,
3738 _dpp_row_rr
= 0x120,
3743 dpp_row_mirror
= 0x140,
3744 dpp_row_half_mirror
= 0x141,
3745 dpp_row_bcast15
= 0x142,
3746 dpp_row_bcast31
= 0x143
3749 static inline enum dpp_ctrl
3750 dpp_quad_perm(unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
3752 assert(lane0
< 4 && lane1
< 4 && lane2
< 4 && lane3
< 4);
3753 return _dpp_quad_perm
| lane0
| (lane1
<< 2) | (lane2
<< 4) | (lane3
<< 6);
3756 static inline enum dpp_ctrl
3757 dpp_row_sl(unsigned amount
)
3759 assert(amount
> 0 && amount
< 16);
3760 return _dpp_row_sl
| amount
;
3763 static inline enum dpp_ctrl
3764 dpp_row_sr(unsigned amount
)
3766 assert(amount
> 0 && amount
< 16);
3767 return _dpp_row_sr
| amount
;
3771 _ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3772 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3775 LLVMTypeRef type
= LLVMTypeOf(src
);
3778 old
= LLVMBuildZExt(ctx
->builder
, old
, ctx
->i32
, "");
3779 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3781 res
= ac_build_intrinsic(ctx
, "llvm.amdgcn.update.dpp.i32", ctx
->i32
,
3784 LLVMConstInt(ctx
->i32
, dpp_ctrl
, 0),
3785 LLVMConstInt(ctx
->i32
, row_mask
, 0),
3786 LLVMConstInt(ctx
->i32
, bank_mask
, 0),
3787 LLVMConstInt(ctx
->i1
, bound_ctrl
, 0) },
3788 6, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3790 return LLVMBuildTrunc(ctx
->builder
, res
, type
, "");
3794 ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3795 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3798 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3799 src
= ac_to_integer(ctx
, src
);
3800 old
= ac_to_integer(ctx
, old
);
3801 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3804 assert(bits
% 32 == 0);
3805 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3806 LLVMValueRef src_vector
=
3807 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3808 LLVMValueRef old_vector
=
3809 LLVMBuildBitCast(ctx
->builder
, old
, vec_type
, "");
3810 ret
= LLVMGetUndef(vec_type
);
3811 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3812 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3813 LLVMConstInt(ctx
->i32
, i
,
3815 old
= LLVMBuildExtractElement(ctx
->builder
, old_vector
,
3816 LLVMConstInt(ctx
->i32
, i
,
3818 LLVMValueRef ret_comp
= _ac_build_dpp(ctx
, old
, src
,
3823 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3825 LLVMConstInt(ctx
->i32
, i
,
3829 ret
= _ac_build_dpp(ctx
, old
, src
, dpp_ctrl
, row_mask
,
3830 bank_mask
, bound_ctrl
);
3832 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3836 _ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3837 bool exchange_rows
, bool bound_ctrl
)
3839 LLVMTypeRef type
= LLVMTypeOf(src
);
3840 LLVMValueRef result
;
3842 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3844 LLVMValueRef args
[6] = {
3847 LLVMConstInt(ctx
->i32
, sel
, false),
3848 LLVMConstInt(ctx
->i32
, sel
>> 32, false),
3849 ctx
->i1true
, /* fi */
3850 bound_ctrl
? ctx
->i1true
: ctx
->i1false
,
3853 result
= ac_build_intrinsic(ctx
, exchange_rows
? "llvm.amdgcn.permlanex16"
3854 : "llvm.amdgcn.permlane16",
3856 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3858 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
3862 ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3863 bool exchange_rows
, bool bound_ctrl
)
3865 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3866 src
= ac_to_integer(ctx
, src
);
3867 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3870 assert(bits
% 32 == 0);
3871 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3872 LLVMValueRef src_vector
=
3873 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3874 ret
= LLVMGetUndef(vec_type
);
3875 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3876 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3877 LLVMConstInt(ctx
->i32
, i
,
3879 LLVMValueRef ret_comp
=
3880 _ac_build_permlane16(ctx
, src
, sel
,
3883 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3885 LLVMConstInt(ctx
->i32
, i
,
3889 ret
= _ac_build_permlane16(ctx
, src
, sel
, exchange_rows
,
3892 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3895 static inline unsigned
3896 ds_pattern_bitmode(unsigned and_mask
, unsigned or_mask
, unsigned xor_mask
)
3898 assert(and_mask
< 32 && or_mask
< 32 && xor_mask
< 32);
3899 return and_mask
| (or_mask
<< 5) | (xor_mask
<< 10);
3903 _ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3905 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3908 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3910 ret
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.swizzle", ctx
->i32
,
3912 src
, LLVMConstInt(ctx
->i32
, mask
, 0) },
3913 2, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3915 return LLVMBuildTrunc(ctx
->builder
, ret
, src_type
, "");
3919 ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3921 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3922 src
= ac_to_integer(ctx
, src
);
3923 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3926 assert(bits
% 32 == 0);
3927 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3928 LLVMValueRef src_vector
=
3929 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3930 ret
= LLVMGetUndef(vec_type
);
3931 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3932 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3933 LLVMConstInt(ctx
->i32
, i
,
3935 LLVMValueRef ret_comp
= _ac_build_ds_swizzle(ctx
, src
,
3937 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3939 LLVMConstInt(ctx
->i32
, i
,
3943 ret
= _ac_build_ds_swizzle(ctx
, src
, mask
);
3945 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3949 ac_build_wwm(struct ac_llvm_context
*ctx
, LLVMValueRef src
)
3951 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3952 unsigned bitsize
= ac_get_elem_bits(ctx
, src_type
);
3953 char name
[32], type
[8];
3956 src
= ac_to_integer(ctx
, src
);
3959 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3961 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3962 snprintf(name
, sizeof(name
), "llvm.amdgcn.wwm.%s", type
);
3963 ret
= ac_build_intrinsic(ctx
, name
, LLVMTypeOf(src
),
3964 (LLVMValueRef
[]) { src
}, 1,
3965 AC_FUNC_ATTR_READNONE
);
3968 ret
= LLVMBuildTrunc(ctx
->builder
, ret
,
3969 ac_to_integer_type(ctx
, src_type
), "");
3971 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3975 ac_build_set_inactive(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
3976 LLVMValueRef inactive
)
3978 char name
[33], type
[8];
3979 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3980 unsigned bitsize
= ac_get_elem_bits(ctx
, src_type
);
3981 src
= ac_to_integer(ctx
, src
);
3982 inactive
= ac_to_integer(ctx
, inactive
);
3985 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3986 inactive
= LLVMBuildZExt(ctx
->builder
, inactive
, ctx
->i32
, "");
3989 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3990 snprintf(name
, sizeof(name
), "llvm.amdgcn.set.inactive.%s", type
);
3992 ac_build_intrinsic(ctx
, name
,
3993 LLVMTypeOf(src
), (LLVMValueRef
[]) {
3995 AC_FUNC_ATTR_READNONE
|
3996 AC_FUNC_ATTR_CONVERGENT
);
3998 ret
= LLVMBuildTrunc(ctx
->builder
, ret
, src_type
, "");
4004 get_reduction_identity(struct ac_llvm_context
*ctx
, nir_op op
, unsigned type_size
)
4006 if (type_size
== 1) {
4008 case nir_op_iadd
: return ctx
->i8_0
;
4009 case nir_op_imul
: return ctx
->i8_1
;
4010 case nir_op_imin
: return LLVMConstInt(ctx
->i8
, INT8_MAX
, 0);
4011 case nir_op_umin
: return LLVMConstInt(ctx
->i8
, UINT8_MAX
, 0);
4012 case nir_op_imax
: return LLVMConstInt(ctx
->i8
, INT8_MIN
, 0);
4013 case nir_op_umax
: return ctx
->i8_0
;
4014 case nir_op_iand
: return LLVMConstInt(ctx
->i8
, -1, 0);
4015 case nir_op_ior
: return ctx
->i8_0
;
4016 case nir_op_ixor
: return ctx
->i8_0
;
4018 unreachable("bad reduction intrinsic");
4020 } else if (type_size
== 2) {
4022 case nir_op_iadd
: return ctx
->i16_0
;
4023 case nir_op_fadd
: return ctx
->f16_0
;
4024 case nir_op_imul
: return ctx
->i16_1
;
4025 case nir_op_fmul
: return ctx
->f16_1
;
4026 case nir_op_imin
: return LLVMConstInt(ctx
->i16
, INT16_MAX
, 0);
4027 case nir_op_umin
: return LLVMConstInt(ctx
->i16
, UINT16_MAX
, 0);
4028 case nir_op_fmin
: return LLVMConstReal(ctx
->f16
, INFINITY
);
4029 case nir_op_imax
: return LLVMConstInt(ctx
->i16
, INT16_MIN
, 0);
4030 case nir_op_umax
: return ctx
->i16_0
;
4031 case nir_op_fmax
: return LLVMConstReal(ctx
->f16
, -INFINITY
);
4032 case nir_op_iand
: return LLVMConstInt(ctx
->i16
, -1, 0);
4033 case nir_op_ior
: return ctx
->i16_0
;
4034 case nir_op_ixor
: return ctx
->i16_0
;
4036 unreachable("bad reduction intrinsic");
4038 } else if (type_size
== 4) {
4040 case nir_op_iadd
: return ctx
->i32_0
;
4041 case nir_op_fadd
: return ctx
->f32_0
;
4042 case nir_op_imul
: return ctx
->i32_1
;
4043 case nir_op_fmul
: return ctx
->f32_1
;
4044 case nir_op_imin
: return LLVMConstInt(ctx
->i32
, INT32_MAX
, 0);
4045 case nir_op_umin
: return LLVMConstInt(ctx
->i32
, UINT32_MAX
, 0);
4046 case nir_op_fmin
: return LLVMConstReal(ctx
->f32
, INFINITY
);
4047 case nir_op_imax
: return LLVMConstInt(ctx
->i32
, INT32_MIN
, 0);
4048 case nir_op_umax
: return ctx
->i32_0
;
4049 case nir_op_fmax
: return LLVMConstReal(ctx
->f32
, -INFINITY
);
4050 case nir_op_iand
: return LLVMConstInt(ctx
->i32
, -1, 0);
4051 case nir_op_ior
: return ctx
->i32_0
;
4052 case nir_op_ixor
: return ctx
->i32_0
;
4054 unreachable("bad reduction intrinsic");
4056 } else { /* type_size == 64bit */
4058 case nir_op_iadd
: return ctx
->i64_0
;
4059 case nir_op_fadd
: return ctx
->f64_0
;
4060 case nir_op_imul
: return ctx
->i64_1
;
4061 case nir_op_fmul
: return ctx
->f64_1
;
4062 case nir_op_imin
: return LLVMConstInt(ctx
->i64
, INT64_MAX
, 0);
4063 case nir_op_umin
: return LLVMConstInt(ctx
->i64
, UINT64_MAX
, 0);
4064 case nir_op_fmin
: return LLVMConstReal(ctx
->f64
, INFINITY
);
4065 case nir_op_imax
: return LLVMConstInt(ctx
->i64
, INT64_MIN
, 0);
4066 case nir_op_umax
: return ctx
->i64_0
;
4067 case nir_op_fmax
: return LLVMConstReal(ctx
->f64
, -INFINITY
);
4068 case nir_op_iand
: return LLVMConstInt(ctx
->i64
, -1, 0);
4069 case nir_op_ior
: return ctx
->i64_0
;
4070 case nir_op_ixor
: return ctx
->i64_0
;
4072 unreachable("bad reduction intrinsic");
4078 ac_build_alu_op(struct ac_llvm_context
*ctx
, LLVMValueRef lhs
, LLVMValueRef rhs
, nir_op op
)
4080 bool _64bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 8;
4081 bool _32bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 4;
4083 case nir_op_iadd
: return LLVMBuildAdd(ctx
->builder
, lhs
, rhs
, "");
4084 case nir_op_fadd
: return LLVMBuildFAdd(ctx
->builder
, lhs
, rhs
, "");
4085 case nir_op_imul
: return LLVMBuildMul(ctx
->builder
, lhs
, rhs
, "");
4086 case nir_op_fmul
: return LLVMBuildFMul(ctx
->builder
, lhs
, rhs
, "");
4087 case nir_op_imin
: return LLVMBuildSelect(ctx
->builder
,
4088 LLVMBuildICmp(ctx
->builder
, LLVMIntSLT
, lhs
, rhs
, ""),
4090 case nir_op_umin
: return LLVMBuildSelect(ctx
->builder
,
4091 LLVMBuildICmp(ctx
->builder
, LLVMIntULT
, lhs
, rhs
, ""),
4093 case nir_op_fmin
: return ac_build_intrinsic(ctx
,
4094 _64bit
? "llvm.minnum.f64" : _32bit
? "llvm.minnum.f32" : "llvm.minnum.f16",
4095 _64bit
? ctx
->f64
: _32bit
? ctx
->f32
: ctx
->f16
,
4096 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4097 case nir_op_imax
: return LLVMBuildSelect(ctx
->builder
,
4098 LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, lhs
, rhs
, ""),
4100 case nir_op_umax
: return LLVMBuildSelect(ctx
->builder
,
4101 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, lhs
, rhs
, ""),
4103 case nir_op_fmax
: return ac_build_intrinsic(ctx
,
4104 _64bit
? "llvm.maxnum.f64" : _32bit
? "llvm.maxnum.f32" : "llvm.maxnum.f16",
4105 _64bit
? ctx
->f64
: _32bit
? ctx
->f32
: ctx
->f16
,
4106 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4107 case nir_op_iand
: return LLVMBuildAnd(ctx
->builder
, lhs
, rhs
, "");
4108 case nir_op_ior
: return LLVMBuildOr(ctx
->builder
, lhs
, rhs
, "");
4109 case nir_op_ixor
: return LLVMBuildXor(ctx
->builder
, lhs
, rhs
, "");
4111 unreachable("bad reduction intrinsic");
4116 * \param src The value to shift.
4117 * \param identity The value to use the first lane.
4118 * \param maxprefix specifies that the result only needs to be correct for a
4119 * prefix of this many threads
4120 * \return src, shifted 1 lane up, and identity shifted into lane 0.
4123 ac_wavefront_shift_right_1(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4124 LLVMValueRef identity
, unsigned maxprefix
)
4126 if (ctx
->chip_class
>= GFX10
) {
4127 /* wavefront shift_right by 1 on GFX10 (emulate dpp_wf_sr1) */
4128 LLVMValueRef active
, tmp1
, tmp2
;
4129 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4131 tmp1
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
4133 tmp2
= ac_build_permlane16(ctx
, src
, (uint64_t)~0, true, false);
4135 if (maxprefix
> 32) {
4136 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
,
4137 LLVMConstInt(ctx
->i32
, 32, false), "");
4139 tmp2
= LLVMBuildSelect(ctx
->builder
, active
,
4140 ac_build_readlane(ctx
, src
,
4141 LLVMConstInt(ctx
->i32
, 31, false)),
4144 active
= LLVMBuildOr(ctx
->builder
, active
,
4145 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4146 LLVMBuildAnd(ctx
->builder
, tid
,
4147 LLVMConstInt(ctx
->i32
, 0x1f, false), ""),
4148 LLVMConstInt(ctx
->i32
, 0x10, false), ""), "");
4149 return LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4150 } else if (maxprefix
> 16) {
4151 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
,
4152 LLVMConstInt(ctx
->i32
, 16, false), "");
4154 return LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4156 } else if (ctx
->chip_class
>= GFX8
) {
4157 return ac_build_dpp(ctx
, identity
, src
, dpp_wf_sr1
, 0xf, 0xf, false);
4160 /* wavefront shift_right by 1 on SI/CI */
4161 LLVMValueRef active
, tmp1
, tmp2
;
4162 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4163 tmp1
= ac_build_ds_swizzle(ctx
, src
, (1 << 15) | dpp_quad_perm(0, 0, 1, 2));
4164 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x18, 0x03, 0x00));
4165 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4166 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0x7, 0), ""),
4167 LLVMConstInt(ctx
->i32
, 0x4, 0), "");
4168 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4169 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x10, 0x07, 0x00));
4170 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4171 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0xf, 0), ""),
4172 LLVMConstInt(ctx
->i32
, 0x8, 0), "");
4173 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4174 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x00, 0x0f, 0x00));
4175 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4176 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0x1f, 0), ""),
4177 LLVMConstInt(ctx
->i32
, 0x10, 0), "");
4178 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4179 tmp2
= ac_build_readlane(ctx
, src
, LLVMConstInt(ctx
->i32
, 31, 0));
4180 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
, LLVMConstInt(ctx
->i32
, 32, 0), "");
4181 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4182 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
, LLVMConstInt(ctx
->i32
, 0, 0), "");
4183 return LLVMBuildSelect(ctx
->builder
, active
, identity
, tmp1
, "");
4187 * \param maxprefix specifies that the result only needs to be correct for a
4188 * prefix of this many threads
4191 ac_build_scan(struct ac_llvm_context
*ctx
, nir_op op
, LLVMValueRef src
, LLVMValueRef identity
,
4192 unsigned maxprefix
, bool inclusive
)
4194 LLVMValueRef result
, tmp
;
4197 src
= ac_wavefront_shift_right_1(ctx
, src
, identity
, maxprefix
);
4201 if (ctx
->chip_class
<= GFX7
) {
4202 assert(maxprefix
== 64);
4203 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4204 LLVMValueRef active
;
4205 tmp
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x1e, 0x00, 0x00));
4206 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4207 LLVMBuildAnd(ctx
->builder
, tid
, ctx
->i32_1
, ""),
4209 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4210 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4211 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1c, 0x01, 0x00));
4212 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4213 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 2, 0), ""),
4215 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4216 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4217 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x18, 0x03, 0x00));
4218 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4219 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 4, 0), ""),
4221 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4222 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4223 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x10, 0x07, 0x00));
4224 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4225 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 8, 0), ""),
4227 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4228 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4229 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x00, 0x0f, 0x00));
4230 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4231 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 16, 0), ""),
4233 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4234 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4235 tmp
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, 0));
4236 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4237 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 32, 0), ""),
4239 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4240 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4246 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
4247 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4250 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(2), 0xf, 0xf, false);
4251 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4254 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(3), 0xf, 0xf, false);
4255 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4258 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(4), 0xf, 0xe, false);
4259 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4262 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(8), 0xf, 0xc, false);
4263 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4264 if (maxprefix
<= 16)
4267 if (ctx
->chip_class
>= GFX10
) {
4268 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4269 LLVMValueRef active
;
4271 tmp
= ac_build_permlane16(ctx
, result
, ~(uint64_t)0, true, false);
4273 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4274 LLVMBuildAnd(ctx
->builder
, tid
,
4275 LLVMConstInt(ctx
->i32
, 16, false), ""),
4278 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4280 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4282 if (maxprefix
<= 32)
4285 tmp
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, false));
4287 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, tid
,
4288 LLVMConstInt(ctx
->i32
, 32, false), "");
4290 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4292 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4296 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4297 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4298 if (maxprefix
<= 32)
4300 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4301 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4306 ac_build_inclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4308 LLVMValueRef result
;
4310 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4311 LLVMBuilderRef builder
= ctx
->builder
;
4312 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4313 result
= ac_build_ballot(ctx
, src
);
4314 result
= ac_build_mbcnt(ctx
, result
);
4315 result
= LLVMBuildAdd(builder
, result
, src
, "");
4319 ac_build_optimization_barrier(ctx
, &src
);
4321 LLVMValueRef identity
=
4322 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4323 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4324 LLVMTypeOf(identity
), "");
4325 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, true);
4327 return ac_build_wwm(ctx
, result
);
4331 ac_build_exclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4333 LLVMValueRef result
;
4335 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4336 LLVMBuilderRef builder
= ctx
->builder
;
4337 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4338 result
= ac_build_ballot(ctx
, src
);
4339 result
= ac_build_mbcnt(ctx
, result
);
4343 ac_build_optimization_barrier(ctx
, &src
);
4345 LLVMValueRef identity
=
4346 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4347 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4348 LLVMTypeOf(identity
), "");
4349 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, false);
4351 return ac_build_wwm(ctx
, result
);
4355 ac_build_reduce(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
, unsigned cluster_size
)
4357 if (cluster_size
== 1) return src
;
4358 ac_build_optimization_barrier(ctx
, &src
);
4359 LLVMValueRef result
, swap
;
4360 LLVMValueRef identity
= get_reduction_identity(ctx
, op
,
4361 ac_get_type_size(LLVMTypeOf(src
)));
4362 result
= LLVMBuildBitCast(ctx
->builder
,
4363 ac_build_set_inactive(ctx
, src
, identity
),
4364 LLVMTypeOf(identity
), "");
4365 swap
= ac_build_quad_swizzle(ctx
, result
, 1, 0, 3, 2);
4366 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4367 if (cluster_size
== 2) return ac_build_wwm(ctx
, result
);
4369 swap
= ac_build_quad_swizzle(ctx
, result
, 2, 3, 0, 1);
4370 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4371 if (cluster_size
== 4) return ac_build_wwm(ctx
, result
);
4373 if (ctx
->chip_class
>= GFX8
)
4374 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_half_mirror
, 0xf, 0xf, false);
4376 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x04));
4377 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4378 if (cluster_size
== 8) return ac_build_wwm(ctx
, result
);
4380 if (ctx
->chip_class
>= GFX8
)
4381 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_mirror
, 0xf, 0xf, false);
4383 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x08));
4384 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4385 if (cluster_size
== 16) return ac_build_wwm(ctx
, result
);
4387 if (ctx
->chip_class
>= GFX10
)
4388 swap
= ac_build_permlane16(ctx
, result
, 0, true, false);
4389 else if (ctx
->chip_class
>= GFX8
&& cluster_size
!= 32)
4390 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4392 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x10));
4393 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4394 if (cluster_size
== 32) return ac_build_wwm(ctx
, result
);
4396 if (ctx
->chip_class
>= GFX8
) {
4397 if (ctx
->wave_size
== 64) {
4398 if (ctx
->chip_class
>= GFX10
)
4399 swap
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, false));
4401 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4402 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4403 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 63, 0));
4406 return ac_build_wwm(ctx
, result
);
4408 swap
= ac_build_readlane(ctx
, result
, ctx
->i32_0
);
4409 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 32, 0));
4410 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4411 return ac_build_wwm(ctx
, result
);
4416 * "Top half" of a scan that reduces per-wave values across an entire
4419 * The source value must be present in the highest lane of the wave, and the
4420 * highest lane must be live.
4423 ac_build_wg_wavescan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4425 if (ws
->maxwaves
<= 1)
4428 const LLVMValueRef last_lane
= LLVMConstInt(ctx
->i32
, ctx
->wave_size
- 1, false);
4429 LLVMBuilderRef builder
= ctx
->builder
;
4430 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4433 tmp
= LLVMBuildICmp(builder
, LLVMIntEQ
, tid
, last_lane
, "");
4434 ac_build_ifcc(ctx
, tmp
, 1000);
4435 LLVMBuildStore(builder
, ws
->src
, LLVMBuildGEP(builder
, ws
->scratch
, &ws
->waveidx
, 1, ""));
4436 ac_build_endif(ctx
, 1000);
4440 * "Bottom half" of a scan that reduces per-wave values across an entire
4443 * The caller must place a barrier between the top and bottom halves.
4446 ac_build_wg_wavescan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4448 const LLVMTypeRef type
= LLVMTypeOf(ws
->src
);
4449 const LLVMValueRef identity
=
4450 get_reduction_identity(ctx
, ws
->op
, ac_get_type_size(type
));
4452 if (ws
->maxwaves
<= 1) {
4453 ws
->result_reduce
= ws
->src
;
4454 ws
->result_inclusive
= ws
->src
;
4455 ws
->result_exclusive
= identity
;
4458 assert(ws
->maxwaves
<= 32);
4460 LLVMBuilderRef builder
= ctx
->builder
;
4461 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4462 LLVMBasicBlockRef bbs
[2];
4463 LLVMValueRef phivalues_scan
[2];
4464 LLVMValueRef tmp
, tmp2
;
4466 bbs
[0] = LLVMGetInsertBlock(builder
);
4467 phivalues_scan
[0] = LLVMGetUndef(type
);
4469 if (ws
->enable_reduce
)
4470 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->numwaves
, "");
4471 else if (ws
->enable_inclusive
)
4472 tmp
= LLVMBuildICmp(builder
, LLVMIntULE
, tid
, ws
->waveidx
, "");
4474 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->waveidx
, "");
4475 ac_build_ifcc(ctx
, tmp
, 1001);
4477 tmp
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, ws
->scratch
, &tid
, 1, ""), "");
4479 ac_build_optimization_barrier(ctx
, &tmp
);
4481 bbs
[1] = LLVMGetInsertBlock(builder
);
4482 phivalues_scan
[1] = ac_build_scan(ctx
, ws
->op
, tmp
, identity
, ws
->maxwaves
, true);
4484 ac_build_endif(ctx
, 1001);
4486 const LLVMValueRef scan
= ac_build_phi(ctx
, type
, 2, phivalues_scan
, bbs
);
4488 if (ws
->enable_reduce
) {
4489 tmp
= LLVMBuildSub(builder
, ws
->numwaves
, ctx
->i32_1
, "");
4490 ws
->result_reduce
= ac_build_readlane(ctx
, scan
, tmp
);
4492 if (ws
->enable_inclusive
)
4493 ws
->result_inclusive
= ac_build_readlane(ctx
, scan
, ws
->waveidx
);
4494 if (ws
->enable_exclusive
) {
4495 tmp
= LLVMBuildSub(builder
, ws
->waveidx
, ctx
->i32_1
, "");
4496 tmp
= ac_build_readlane(ctx
, scan
, tmp
);
4497 tmp2
= LLVMBuildICmp(builder
, LLVMIntEQ
, ws
->waveidx
, ctx
->i32_0
, "");
4498 ws
->result_exclusive
= LLVMBuildSelect(builder
, tmp2
, identity
, tmp
, "");
4503 * Inclusive scan of a per-wave value across an entire workgroup.
4505 * This implies an s_barrier instruction.
4507 * Unlike ac_build_inclusive_scan, the caller \em must ensure that all threads
4508 * of the workgroup are live. (This requirement cannot easily be relaxed in a
4509 * useful manner because of the barrier in the algorithm.)
4512 ac_build_wg_wavescan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4514 ac_build_wg_wavescan_top(ctx
, ws
);
4515 ac_build_s_barrier(ctx
);
4516 ac_build_wg_wavescan_bottom(ctx
, ws
);
4520 * "Top half" of a scan that reduces per-thread values across an entire
4523 * All lanes must be active when this code runs.
4526 ac_build_wg_scan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4528 if (ws
->enable_exclusive
) {
4529 ws
->extra
= ac_build_exclusive_scan(ctx
, ws
->src
, ws
->op
);
4530 if (LLVMTypeOf(ws
->src
) == ctx
->i1
&& ws
->op
== nir_op_iadd
)
4531 ws
->src
= LLVMBuildZExt(ctx
->builder
, ws
->src
, ctx
->i32
, "");
4532 ws
->src
= ac_build_alu_op(ctx
, ws
->extra
, ws
->src
, ws
->op
);
4534 ws
->src
= ac_build_inclusive_scan(ctx
, ws
->src
, ws
->op
);
4537 bool enable_inclusive
= ws
->enable_inclusive
;
4538 bool enable_exclusive
= ws
->enable_exclusive
;
4539 ws
->enable_inclusive
= false;
4540 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4541 ac_build_wg_wavescan_top(ctx
, ws
);
4542 ws
->enable_inclusive
= enable_inclusive
;
4543 ws
->enable_exclusive
= enable_exclusive
;
4547 * "Bottom half" of a scan that reduces per-thread values across an entire
4550 * The caller must place a barrier between the top and bottom halves.
4553 ac_build_wg_scan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4555 bool enable_inclusive
= ws
->enable_inclusive
;
4556 bool enable_exclusive
= ws
->enable_exclusive
;
4557 ws
->enable_inclusive
= false;
4558 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4559 ac_build_wg_wavescan_bottom(ctx
, ws
);
4560 ws
->enable_inclusive
= enable_inclusive
;
4561 ws
->enable_exclusive
= enable_exclusive
;
4563 /* ws->result_reduce is already the correct value */
4564 if (ws
->enable_inclusive
)
4565 ws
->result_inclusive
= ac_build_alu_op(ctx
, ws
->result_inclusive
, ws
->src
, ws
->op
);
4566 if (ws
->enable_exclusive
)
4567 ws
->result_exclusive
= ac_build_alu_op(ctx
, ws
->result_exclusive
, ws
->extra
, ws
->op
);
4571 * A scan that reduces per-thread values across an entire workgroup.
4573 * The caller must ensure that all lanes are active when this code runs
4574 * (WWM is insufficient!), because there is an implied barrier.
4577 ac_build_wg_scan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4579 ac_build_wg_scan_top(ctx
, ws
);
4580 ac_build_s_barrier(ctx
);
4581 ac_build_wg_scan_bottom(ctx
, ws
);
4585 ac_build_quad_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4586 unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
4588 unsigned mask
= dpp_quad_perm(lane0
, lane1
, lane2
, lane3
);
4589 if (ctx
->chip_class
>= GFX8
) {
4590 return ac_build_dpp(ctx
, src
, src
, mask
, 0xf, 0xf, false);
4592 return ac_build_ds_swizzle(ctx
, src
, (1 << 15) | mask
);
4597 ac_build_shuffle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef index
)
4599 LLVMTypeRef type
= LLVMTypeOf(src
);
4600 LLVMValueRef result
;
4602 index
= LLVMBuildMul(ctx
->builder
, index
, LLVMConstInt(ctx
->i32
, 4, 0), "");
4603 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
4605 result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.bpermute", ctx
->i32
,
4606 (LLVMValueRef
[]) {index
, src
}, 2,
4607 AC_FUNC_ATTR_READNONE
|
4608 AC_FUNC_ATTR_CONVERGENT
);
4609 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
4613 ac_build_frexp_exp(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4619 if (bitsize
== 16) {
4620 intr
= "llvm.amdgcn.frexp.exp.i16.f16";
4622 } else if (bitsize
== 32) {
4623 intr
= "llvm.amdgcn.frexp.exp.i32.f32";
4626 intr
= "llvm.amdgcn.frexp.exp.i32.f64";
4630 LLVMValueRef params
[] = {
4633 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4634 AC_FUNC_ATTR_READNONE
);
4637 ac_build_frexp_mant(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4643 if (bitsize
== 16) {
4644 intr
= "llvm.amdgcn.frexp.mant.f16";
4646 } else if (bitsize
== 32) {
4647 intr
= "llvm.amdgcn.frexp.mant.f32";
4650 intr
= "llvm.amdgcn.frexp.mant.f64";
4654 LLVMValueRef params
[] = {
4657 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4658 AC_FUNC_ATTR_READNONE
);
4662 ac_build_canonicalize(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4668 if (bitsize
== 16) {
4669 intr
= "llvm.canonicalize.f16";
4671 } else if (bitsize
== 32) {
4672 intr
= "llvm.canonicalize.f32";
4675 intr
= "llvm.canonicalize.f64";
4679 LLVMValueRef params
[] = {
4682 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4683 AC_FUNC_ATTR_READNONE
);
4687 * this takes an I,J coordinate pair,
4688 * and works out the X and Y derivatives.
4689 * it returns DDX(I), DDX(J), DDY(I), DDY(J).
4692 ac_build_ddxy_interp(struct ac_llvm_context
*ctx
, LLVMValueRef interp_ij
)
4694 LLVMValueRef result
[4], a
;
4697 for (i
= 0; i
< 2; i
++) {
4698 a
= LLVMBuildExtractElement(ctx
->builder
, interp_ij
,
4699 LLVMConstInt(ctx
->i32
, i
, false), "");
4700 result
[i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 1, a
);
4701 result
[2+i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 2, a
);
4703 return ac_build_gather_values(ctx
, result
, 4);
4707 ac_build_load_helper_invocation(struct ac_llvm_context
*ctx
)
4709 LLVMValueRef result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ps.live",
4711 AC_FUNC_ATTR_READNONE
);
4712 result
= LLVMBuildNot(ctx
->builder
, result
, "");
4713 return LLVMBuildSExt(ctx
->builder
, result
, ctx
->i32
, "");
4717 ac_build_is_helper_invocation(struct ac_llvm_context
*ctx
)
4719 if (!ctx
->postponed_kill
)
4720 return ac_build_load_helper_invocation(ctx
);
4722 /* !(exact && postponed) */
4723 LLVMValueRef exact
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ps.live",
4725 AC_FUNC_ATTR_READNONE
);
4727 LLVMValueRef postponed
= LLVMBuildLoad(ctx
->builder
, ctx
->postponed_kill
, "");
4728 LLVMValueRef result
= LLVMBuildAnd(ctx
->builder
, exact
, postponed
, "");
4730 return LLVMBuildSelect(ctx
->builder
, result
, ctx
->i32_0
,
4731 LLVMConstInt(ctx
->i32
, 0xFFFFFFFF, false), "");
4734 LLVMValueRef
ac_build_call(struct ac_llvm_context
*ctx
, LLVMValueRef func
,
4735 LLVMValueRef
*args
, unsigned num_args
)
4737 LLVMValueRef ret
= LLVMBuildCall(ctx
->builder
, func
, args
, num_args
, "");
4738 LLVMSetInstructionCallConv(ret
, LLVMGetFunctionCallConv(func
));
4743 ac_export_mrt_z(struct ac_llvm_context
*ctx
, LLVMValueRef depth
,
4744 LLVMValueRef stencil
, LLVMValueRef samplemask
,
4745 struct ac_export_args
*args
)
4748 unsigned format
= ac_get_spi_shader_z_format(depth
!= NULL
,
4750 samplemask
!= NULL
);
4752 assert(depth
|| stencil
|| samplemask
);
4754 memset(args
, 0, sizeof(*args
));
4756 args
->valid_mask
= 1; /* whether the EXEC mask is valid */
4757 args
->done
= 1; /* DONE bit */
4759 /* Specify the target we are exporting */
4760 args
->target
= V_008DFC_SQ_EXP_MRTZ
;
4762 args
->compr
= 0; /* COMP flag */
4763 args
->out
[0] = LLVMGetUndef(ctx
->f32
); /* R, depth */
4764 args
->out
[1] = LLVMGetUndef(ctx
->f32
); /* G, stencil test val[0:7], stencil op val[8:15] */
4765 args
->out
[2] = LLVMGetUndef(ctx
->f32
); /* B, sample mask */
4766 args
->out
[3] = LLVMGetUndef(ctx
->f32
); /* A, alpha to mask */
4768 if (format
== V_028710_SPI_SHADER_UINT16_ABGR
) {
4770 args
->compr
= 1; /* COMPR flag */
4773 /* Stencil should be in X[23:16]. */
4774 stencil
= ac_to_integer(ctx
, stencil
);
4775 stencil
= LLVMBuildShl(ctx
->builder
, stencil
,
4776 LLVMConstInt(ctx
->i32
, 16, 0), "");
4777 args
->out
[0] = ac_to_float(ctx
, stencil
);
4781 /* SampleMask should be in Y[15:0]. */
4782 args
->out
[1] = samplemask
;
4787 args
->out
[0] = depth
;
4791 args
->out
[1] = stencil
;
4795 args
->out
[2] = samplemask
;
4800 /* GFX6 (except OLAND and HAINAN) has a bug that it only looks
4801 * at the X writemask component. */
4802 if (ctx
->chip_class
== GFX6
&&
4803 ctx
->family
!= CHIP_OLAND
&&
4804 ctx
->family
!= CHIP_HAINAN
)
4807 /* Specify which components to enable */
4808 args
->enabled_channels
= mask
;
4811 /* Send GS Alloc Req message from the first wave of the group to SPI.
4812 * Message payload is:
4813 * - bits 0..10: vertices in group
4814 * - bits 12..22: primitives in group
4816 void ac_build_sendmsg_gs_alloc_req(struct ac_llvm_context
*ctx
, LLVMValueRef wave_id
,
4817 LLVMValueRef vtx_cnt
, LLVMValueRef prim_cnt
)
4819 LLVMBuilderRef builder
= ctx
->builder
;
4821 bool export_dummy_prim
= false;
4823 /* HW workaround for a GPU hang with 100% culling.
4824 * We always have to export at least 1 primitive.
4825 * Export a degenerate triangle using vertex 0 for all 3 vertices.
4827 if (prim_cnt
== ctx
->i32_0
&& ctx
->chip_class
== GFX10
) {
4828 assert(vtx_cnt
== ctx
->i32_0
);
4829 prim_cnt
= ctx
->i32_1
;
4830 vtx_cnt
= ctx
->i32_1
;
4831 export_dummy_prim
= true;
4834 ac_build_ifcc(ctx
, LLVMBuildICmp(builder
, LLVMIntEQ
, wave_id
, ctx
->i32_0
, ""), 5020);
4836 tmp
= LLVMBuildShl(builder
, prim_cnt
, LLVMConstInt(ctx
->i32
, 12, false),"");
4837 tmp
= LLVMBuildOr(builder
, tmp
, vtx_cnt
, "");
4838 ac_build_sendmsg(ctx
, AC_SENDMSG_GS_ALLOC_REQ
, tmp
);
4840 if (export_dummy_prim
) {
4841 struct ac_ngg_prim prim
= {};
4842 /* The vertex indices are 0,0,0. */
4843 prim
.passthrough
= ctx
->i32_0
;
4845 struct ac_export_args pos
= {};
4846 pos
.out
[0] = pos
.out
[1] = pos
.out
[2] = pos
.out
[3] = ctx
->f32_0
;
4847 pos
.target
= V_008DFC_SQ_EXP_POS
;
4848 pos
.enabled_channels
= 0xf;
4851 ac_build_ifcc(ctx
, LLVMBuildICmp(builder
, LLVMIntEQ
, ac_get_thread_id(ctx
),
4852 ctx
->i32_0
, ""), 5021);
4853 ac_build_export_prim(ctx
, &prim
);
4854 ac_build_export(ctx
, &pos
);
4855 ac_build_endif(ctx
, 5021);
4858 ac_build_endif(ctx
, 5020);
4861 LLVMValueRef
ac_pack_prim_export(struct ac_llvm_context
*ctx
,
4862 const struct ac_ngg_prim
*prim
)
4864 /* The prim export format is:
4865 * - bits 0..8: index 0
4866 * - bit 9: edge flag 0
4867 * - bits 10..18: index 1
4868 * - bit 19: edge flag 1
4869 * - bits 20..28: index 2
4870 * - bit 29: edge flag 2
4871 * - bit 31: null primitive (skip)
4873 LLVMBuilderRef builder
= ctx
->builder
;
4874 LLVMValueRef tmp
= LLVMBuildZExt(builder
, prim
->isnull
, ctx
->i32
, "");
4875 LLVMValueRef result
= LLVMBuildShl(builder
, tmp
, LLVMConstInt(ctx
->i32
, 31, false), "");
4877 for (unsigned i
= 0; i
< prim
->num_vertices
; ++i
) {
4878 tmp
= LLVMBuildShl(builder
, prim
->index
[i
],
4879 LLVMConstInt(ctx
->i32
, 10 * i
, false), "");
4880 result
= LLVMBuildOr(builder
, result
, tmp
, "");
4881 tmp
= LLVMBuildZExt(builder
, prim
->edgeflag
[i
], ctx
->i32
, "");
4882 tmp
= LLVMBuildShl(builder
, tmp
,
4883 LLVMConstInt(ctx
->i32
, 10 * i
+ 9, false), "");
4884 result
= LLVMBuildOr(builder
, result
, tmp
, "");
4889 void ac_build_export_prim(struct ac_llvm_context
*ctx
,
4890 const struct ac_ngg_prim
*prim
)
4892 struct ac_export_args args
;
4894 if (prim
->passthrough
) {
4895 args
.out
[0] = prim
->passthrough
;
4897 args
.out
[0] = ac_pack_prim_export(ctx
, prim
);
4900 args
.out
[0] = LLVMBuildBitCast(ctx
->builder
, args
.out
[0], ctx
->f32
, "");
4901 args
.out
[1] = LLVMGetUndef(ctx
->f32
);
4902 args
.out
[2] = LLVMGetUndef(ctx
->f32
);
4903 args
.out
[3] = LLVMGetUndef(ctx
->f32
);
4905 args
.target
= V_008DFC_SQ_EXP_PRIM
;
4906 args
.enabled_channels
= 1;
4908 args
.valid_mask
= false;
4911 ac_build_export(ctx
, &args
);
4915 arg_llvm_type(enum ac_arg_type type
, unsigned size
, struct ac_llvm_context
*ctx
)
4917 if (type
== AC_ARG_FLOAT
) {
4918 return size
== 1 ? ctx
->f32
: LLVMVectorType(ctx
->f32
, size
);
4919 } else if (type
== AC_ARG_INT
) {
4920 return size
== 1 ? ctx
->i32
: LLVMVectorType(ctx
->i32
, size
);
4922 LLVMTypeRef ptr_type
;
4924 case AC_ARG_CONST_PTR
:
4927 case AC_ARG_CONST_FLOAT_PTR
:
4928 ptr_type
= ctx
->f32
;
4930 case AC_ARG_CONST_PTR_PTR
:
4931 ptr_type
= ac_array_in_const32_addr_space(ctx
->i8
);
4933 case AC_ARG_CONST_DESC_PTR
:
4934 ptr_type
= ctx
->v4i32
;
4936 case AC_ARG_CONST_IMAGE_PTR
:
4937 ptr_type
= ctx
->v8i32
;
4940 unreachable("unknown arg type");
4943 return ac_array_in_const32_addr_space(ptr_type
);
4946 return ac_array_in_const_addr_space(ptr_type
);
4952 ac_build_main(const struct ac_shader_args
*args
,
4953 struct ac_llvm_context
*ctx
,
4954 enum ac_llvm_calling_convention convention
,
4955 const char *name
, LLVMTypeRef ret_type
,
4956 LLVMModuleRef module
)
4958 LLVMTypeRef arg_types
[AC_MAX_ARGS
];
4960 for (unsigned i
= 0; i
< args
->arg_count
; i
++) {
4961 arg_types
[i
] = arg_llvm_type(args
->args
[i
].type
,
4962 args
->args
[i
].size
, ctx
);
4965 LLVMTypeRef main_function_type
=
4966 LLVMFunctionType(ret_type
, arg_types
, args
->arg_count
, 0);
4968 LLVMValueRef main_function
=
4969 LLVMAddFunction(module
, name
, main_function_type
);
4970 LLVMBasicBlockRef main_function_body
=
4971 LLVMAppendBasicBlockInContext(ctx
->context
, main_function
, "main_body");
4972 LLVMPositionBuilderAtEnd(ctx
->builder
, main_function_body
);
4974 LLVMSetFunctionCallConv(main_function
, convention
);
4975 for (unsigned i
= 0; i
< args
->arg_count
; ++i
) {
4976 LLVMValueRef P
= LLVMGetParam(main_function
, i
);
4978 if (args
->args
[i
].file
!= AC_ARG_SGPR
)
4981 ac_add_function_attr(ctx
->context
, main_function
, i
+ 1, AC_FUNC_ATTR_INREG
);
4983 if (LLVMGetTypeKind(LLVMTypeOf(P
)) == LLVMPointerTypeKind
) {
4984 ac_add_function_attr(ctx
->context
, main_function
, i
+ 1, AC_FUNC_ATTR_NOALIAS
);
4985 ac_add_attr_dereferenceable(P
, UINT64_MAX
);
4989 ctx
->main_function
= main_function
;
4991 if (LLVM_VERSION_MAJOR
>= 11) {
4992 /* Enable denormals for FP16 and FP64: */
4993 LLVMAddTargetDependentFunctionAttr(main_function
, "denormal-fp-math",
4995 /* Disable denormals for FP32: */
4996 LLVMAddTargetDependentFunctionAttr(main_function
, "denormal-fp-math-f32",
4997 "preserve-sign,preserve-sign");
4999 return main_function
;
5002 void ac_build_s_endpgm(struct ac_llvm_context
*ctx
)
5004 LLVMTypeRef calltype
= LLVMFunctionType(ctx
->voidt
, NULL
, 0, false);
5005 LLVMValueRef code
= LLVMConstInlineAsm(calltype
, "s_endpgm", "", true, false);
5006 LLVMBuildCall(ctx
->builder
, code
, NULL
, 0, "");
5009 LLVMValueRef
ac_prefix_bitcount(struct ac_llvm_context
*ctx
,
5010 LLVMValueRef mask
, LLVMValueRef index
)
5012 LLVMBuilderRef builder
= ctx
->builder
;
5013 LLVMTypeRef type
= LLVMTypeOf(mask
);
5015 LLVMValueRef bit
= LLVMBuildShl(builder
, LLVMConstInt(type
, 1, 0),
5016 LLVMBuildZExt(builder
, index
, type
, ""), "");
5017 LLVMValueRef prefix_bits
= LLVMBuildSub(builder
, bit
, LLVMConstInt(type
, 1, 0), "");
5018 LLVMValueRef prefix_mask
= LLVMBuildAnd(builder
, mask
, prefix_bits
, "");
5019 return ac_build_bit_count(ctx
, prefix_mask
);
5022 /* Compute the prefix sum of the "mask" bit array with 128 elements (bits). */
5023 LLVMValueRef
ac_prefix_bitcount_2x64(struct ac_llvm_context
*ctx
,
5024 LLVMValueRef mask
[2], LLVMValueRef index
)
5026 LLVMBuilderRef builder
= ctx
->builder
;
5028 /* Reference version using i128. */
5029 LLVMValueRef input_mask
=
5030 LLVMBuildBitCast(builder
, ac_build_gather_values(ctx
, mask
, 2), ctx
->i128
, "");
5032 return ac_prefix_bitcount(ctx
, input_mask
, index
);
5034 /* Optimized version using 2 64-bit masks. */
5035 LLVMValueRef is_hi
, is_0
, c64
, c128
, all_bits
;
5036 LLVMValueRef prefix_mask
[2], shift
[2], mask_bcnt0
, prefix_bcnt
[2];
5038 /* Compute the 128-bit prefix mask. */
5039 c64
= LLVMConstInt(ctx
->i32
, 64, 0);
5040 c128
= LLVMConstInt(ctx
->i32
, 128, 0);
5041 all_bits
= LLVMConstInt(ctx
->i64
, UINT64_MAX
, 0);
5042 /* The first index that can have non-zero high bits in the prefix mask is 65. */
5043 is_hi
= LLVMBuildICmp(builder
, LLVMIntUGT
, index
, c64
, "");
5044 is_0
= LLVMBuildICmp(builder
, LLVMIntEQ
, index
, ctx
->i32_0
, "");
5045 mask_bcnt0
= ac_build_bit_count(ctx
, mask
[0]);
5047 for (unsigned i
= 0; i
< 2; i
++) {
5048 shift
[i
] = LLVMBuildSub(builder
, i
? c128
: c64
, index
, "");
5049 /* For i==0, index==0, the right shift by 64 doesn't give the desired result,
5050 * so we handle it by the is_0 select.
5051 * For i==1, index==64, same story, so we handle it by the last is_hi select.
5052 * For i==0, index==64, we shift by 0, which is what we want.
5054 prefix_mask
[i
] = LLVMBuildLShr(builder
, all_bits
,
5055 LLVMBuildZExt(builder
, shift
[i
], ctx
->i64
, ""), "");
5056 prefix_mask
[i
] = LLVMBuildAnd(builder
, mask
[i
], prefix_mask
[i
], "");
5057 prefix_bcnt
[i
] = ac_build_bit_count(ctx
, prefix_mask
[i
]);
5060 prefix_bcnt
[0] = LLVMBuildSelect(builder
, is_0
, ctx
->i32_0
, prefix_bcnt
[0], "");
5061 prefix_bcnt
[0] = LLVMBuildSelect(builder
, is_hi
, mask_bcnt0
, prefix_bcnt
[0], "");
5062 prefix_bcnt
[1] = LLVMBuildSelect(builder
, is_hi
, prefix_bcnt
[1], ctx
->i32_0
, "");
5064 return LLVMBuildAdd(builder
, prefix_bcnt
[0], prefix_bcnt
[1], "");
5069 * Convert triangle strip indices to triangle indices. This is used to decompose
5070 * triangle strips into triangles.
5072 void ac_build_triangle_strip_indices_to_triangle(struct ac_llvm_context
*ctx
,
5073 LLVMValueRef is_odd
,
5074 LLVMValueRef flatshade_first
,
5075 LLVMValueRef index
[3])
5077 LLVMBuilderRef builder
= ctx
->builder
;
5078 LLVMValueRef out
[3];
5080 /* We need to change the vertex order for odd triangles to get correct
5081 * front/back facing by swapping 2 vertex indices, but we also have to
5082 * keep the provoking vertex in the same place.
5084 * If the first vertex is provoking, swap index 1 and 2.
5085 * If the last vertex is provoking, swap index 0 and 1.
5087 out
[0] = LLVMBuildSelect(builder
, flatshade_first
,
5089 LLVMBuildSelect(builder
, is_odd
,
5090 index
[1], index
[0], ""), "");
5091 out
[1] = LLVMBuildSelect(builder
, flatshade_first
,
5092 LLVMBuildSelect(builder
, is_odd
,
5093 index
[2], index
[1], ""),
5094 LLVMBuildSelect(builder
, is_odd
,
5095 index
[0], index
[1], ""), "");
5096 out
[2] = LLVMBuildSelect(builder
, flatshade_first
,
5097 LLVMBuildSelect(builder
, is_odd
,
5098 index
[1], index
[2], ""),
5100 memcpy(index
, out
, sizeof(out
));