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
)
70 ctx
->context
= LLVMContextCreate();
72 ctx
->chip_class
= chip_class
;
74 ctx
->wave_size
= wave_size
;
75 ctx
->ballot_mask_bits
= ballot_mask_bits
;
76 ctx
->float_mode
= float_mode
;
77 ctx
->module
= ac_create_module(wave_size
== 32 ? compiler
->tm_wave32
80 ctx
->builder
= ac_create_builder(ctx
->context
, float_mode
);
82 ctx
->voidt
= LLVMVoidTypeInContext(ctx
->context
);
83 ctx
->i1
= LLVMInt1TypeInContext(ctx
->context
);
84 ctx
->i8
= LLVMInt8TypeInContext(ctx
->context
);
85 ctx
->i16
= LLVMIntTypeInContext(ctx
->context
, 16);
86 ctx
->i32
= LLVMIntTypeInContext(ctx
->context
, 32);
87 ctx
->i64
= LLVMIntTypeInContext(ctx
->context
, 64);
88 ctx
->intptr
= ctx
->i32
;
89 ctx
->f16
= LLVMHalfTypeInContext(ctx
->context
);
90 ctx
->f32
= LLVMFloatTypeInContext(ctx
->context
);
91 ctx
->f64
= LLVMDoubleTypeInContext(ctx
->context
);
92 ctx
->v2i16
= LLVMVectorType(ctx
->i16
, 2);
93 ctx
->v2i32
= LLVMVectorType(ctx
->i32
, 2);
94 ctx
->v3i32
= LLVMVectorType(ctx
->i32
, 3);
95 ctx
->v4i32
= LLVMVectorType(ctx
->i32
, 4);
96 ctx
->v2f32
= LLVMVectorType(ctx
->f32
, 2);
97 ctx
->v3f32
= LLVMVectorType(ctx
->f32
, 3);
98 ctx
->v4f32
= LLVMVectorType(ctx
->f32
, 4);
99 ctx
->v8i32
= LLVMVectorType(ctx
->i32
, 8);
100 ctx
->iN_wavemask
= LLVMIntTypeInContext(ctx
->context
, ctx
->wave_size
);
101 ctx
->iN_ballotmask
= LLVMIntTypeInContext(ctx
->context
, ballot_mask_bits
);
103 ctx
->i8_0
= LLVMConstInt(ctx
->i8
, 0, false);
104 ctx
->i8_1
= LLVMConstInt(ctx
->i8
, 1, false);
105 ctx
->i16_0
= LLVMConstInt(ctx
->i16
, 0, false);
106 ctx
->i16_1
= LLVMConstInt(ctx
->i16
, 1, false);
107 ctx
->i32_0
= LLVMConstInt(ctx
->i32
, 0, false);
108 ctx
->i32_1
= LLVMConstInt(ctx
->i32
, 1, false);
109 ctx
->i64_0
= LLVMConstInt(ctx
->i64
, 0, false);
110 ctx
->i64_1
= LLVMConstInt(ctx
->i64
, 1, false);
111 ctx
->f16_0
= LLVMConstReal(ctx
->f16
, 0.0);
112 ctx
->f16_1
= LLVMConstReal(ctx
->f16
, 1.0);
113 ctx
->f32_0
= LLVMConstReal(ctx
->f32
, 0.0);
114 ctx
->f32_1
= LLVMConstReal(ctx
->f32
, 1.0);
115 ctx
->f64_0
= LLVMConstReal(ctx
->f64
, 0.0);
116 ctx
->f64_1
= LLVMConstReal(ctx
->f64
, 1.0);
118 ctx
->i1false
= LLVMConstInt(ctx
->i1
, 0, false);
119 ctx
->i1true
= LLVMConstInt(ctx
->i1
, 1, false);
121 ctx
->range_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
124 ctx
->invariant_load_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
125 "invariant.load", 14);
127 ctx
->fpmath_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
, "fpmath", 6);
129 args
[0] = LLVMConstReal(ctx
->f32
, 2.5);
130 ctx
->fpmath_md_2p5_ulp
= LLVMMDNodeInContext(ctx
->context
, args
, 1);
132 ctx
->uniform_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
133 "amdgpu.uniform", 14);
135 ctx
->empty_md
= LLVMMDNodeInContext(ctx
->context
, NULL
, 0);
136 ctx
->flow
= calloc(1, sizeof(*ctx
->flow
));
140 ac_llvm_context_dispose(struct ac_llvm_context
*ctx
)
142 free(ctx
->flow
->stack
);
148 ac_get_llvm_num_components(LLVMValueRef value
)
150 LLVMTypeRef type
= LLVMTypeOf(value
);
151 unsigned num_components
= LLVMGetTypeKind(type
) == LLVMVectorTypeKind
152 ? LLVMGetVectorSize(type
)
154 return num_components
;
158 ac_llvm_extract_elem(struct ac_llvm_context
*ac
,
162 if (LLVMGetTypeKind(LLVMTypeOf(value
)) != LLVMVectorTypeKind
) {
167 return LLVMBuildExtractElement(ac
->builder
, value
,
168 LLVMConstInt(ac
->i32
, index
, false), "");
172 ac_get_elem_bits(struct ac_llvm_context
*ctx
, LLVMTypeRef type
)
174 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
)
175 type
= LLVMGetElementType(type
);
177 if (LLVMGetTypeKind(type
) == LLVMIntegerTypeKind
)
178 return LLVMGetIntTypeWidth(type
);
180 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
181 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_LDS
)
185 if (type
== ctx
->f16
)
187 if (type
== ctx
->f32
)
189 if (type
== ctx
->f64
)
192 unreachable("Unhandled type kind in get_elem_bits");
196 ac_get_type_size(LLVMTypeRef type
)
198 LLVMTypeKind kind
= LLVMGetTypeKind(type
);
201 case LLVMIntegerTypeKind
:
202 return LLVMGetIntTypeWidth(type
) / 8;
203 case LLVMHalfTypeKind
:
205 case LLVMFloatTypeKind
:
207 case LLVMDoubleTypeKind
:
209 case LLVMPointerTypeKind
:
210 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_CONST_32BIT
)
213 case LLVMVectorTypeKind
:
214 return LLVMGetVectorSize(type
) *
215 ac_get_type_size(LLVMGetElementType(type
));
216 case LLVMArrayTypeKind
:
217 return LLVMGetArrayLength(type
) *
218 ac_get_type_size(LLVMGetElementType(type
));
225 static LLVMTypeRef
to_integer_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
229 else if (t
== ctx
->f16
|| t
== ctx
->i16
)
231 else if (t
== ctx
->f32
|| t
== ctx
->i32
)
233 else if (t
== ctx
->f64
|| t
== ctx
->i64
)
236 unreachable("Unhandled integer size");
240 ac_to_integer_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
242 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
243 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
244 return LLVMVectorType(to_integer_type_scalar(ctx
, elem_type
),
245 LLVMGetVectorSize(t
));
247 if (LLVMGetTypeKind(t
) == LLVMPointerTypeKind
) {
248 switch (LLVMGetPointerAddressSpace(t
)) {
249 case AC_ADDR_SPACE_GLOBAL
:
251 case AC_ADDR_SPACE_CONST_32BIT
:
252 case AC_ADDR_SPACE_LDS
:
255 unreachable("unhandled address space");
258 return to_integer_type_scalar(ctx
, t
);
262 ac_to_integer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
264 LLVMTypeRef type
= LLVMTypeOf(v
);
265 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
266 return LLVMBuildPtrToInt(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
268 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
272 ac_to_integer_or_pointer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
274 LLVMTypeRef type
= LLVMTypeOf(v
);
275 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
)
277 return ac_to_integer(ctx
, v
);
280 static LLVMTypeRef
to_float_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
284 else if (t
== ctx
->i16
|| t
== ctx
->f16
)
286 else if (t
== ctx
->i32
|| t
== ctx
->f32
)
288 else if (t
== ctx
->i64
|| t
== ctx
->f64
)
291 unreachable("Unhandled float size");
295 ac_to_float_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
297 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
298 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
299 return LLVMVectorType(to_float_type_scalar(ctx
, elem_type
),
300 LLVMGetVectorSize(t
));
302 return to_float_type_scalar(ctx
, t
);
306 ac_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
308 LLVMTypeRef type
= LLVMTypeOf(v
);
309 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_float_type(ctx
, type
), "");
314 ac_build_intrinsic(struct ac_llvm_context
*ctx
, const char *name
,
315 LLVMTypeRef return_type
, LLVMValueRef
*params
,
316 unsigned param_count
, unsigned attrib_mask
)
318 LLVMValueRef function
, call
;
319 bool set_callsite_attrs
= !(attrib_mask
& AC_FUNC_ATTR_LEGACY
);
321 function
= LLVMGetNamedFunction(ctx
->module
, name
);
323 LLVMTypeRef param_types
[32], function_type
;
326 assert(param_count
<= 32);
328 for (i
= 0; i
< param_count
; ++i
) {
330 param_types
[i
] = LLVMTypeOf(params
[i
]);
333 LLVMFunctionType(return_type
, param_types
, param_count
, 0);
334 function
= LLVMAddFunction(ctx
->module
, name
, function_type
);
336 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
337 LLVMSetLinkage(function
, LLVMExternalLinkage
);
339 if (!set_callsite_attrs
)
340 ac_add_func_attributes(ctx
->context
, function
, attrib_mask
);
343 call
= LLVMBuildCall(ctx
->builder
, function
, params
, param_count
, "");
344 if (set_callsite_attrs
)
345 ac_add_func_attributes(ctx
->context
, call
, attrib_mask
);
350 * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
353 void ac_build_type_name_for_intr(LLVMTypeRef type
, char *buf
, unsigned bufsize
)
355 LLVMTypeRef elem_type
= type
;
357 assert(bufsize
>= 8);
359 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
) {
360 int ret
= snprintf(buf
, bufsize
, "v%u",
361 LLVMGetVectorSize(type
));
363 char *type_name
= LLVMPrintTypeToString(type
);
364 fprintf(stderr
, "Error building type name for: %s\n",
366 LLVMDisposeMessage(type_name
);
369 elem_type
= LLVMGetElementType(type
);
373 switch (LLVMGetTypeKind(elem_type
)) {
375 case LLVMIntegerTypeKind
:
376 snprintf(buf
, bufsize
, "i%d", LLVMGetIntTypeWidth(elem_type
));
378 case LLVMHalfTypeKind
:
379 snprintf(buf
, bufsize
, "f16");
381 case LLVMFloatTypeKind
:
382 snprintf(buf
, bufsize
, "f32");
384 case LLVMDoubleTypeKind
:
385 snprintf(buf
, bufsize
, "f64");
391 * Helper function that builds an LLVM IR PHI node and immediately adds
395 ac_build_phi(struct ac_llvm_context
*ctx
, LLVMTypeRef type
,
396 unsigned count_incoming
, LLVMValueRef
*values
,
397 LLVMBasicBlockRef
*blocks
)
399 LLVMValueRef phi
= LLVMBuildPhi(ctx
->builder
, type
, "");
400 LLVMAddIncoming(phi
, values
, blocks
, count_incoming
);
404 void ac_build_s_barrier(struct ac_llvm_context
*ctx
)
406 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.barrier", ctx
->voidt
, NULL
,
407 0, AC_FUNC_ATTR_CONVERGENT
);
410 /* Prevent optimizations (at least of memory accesses) across the current
411 * point in the program by emitting empty inline assembly that is marked as
412 * having side effects.
414 * Optionally, a value can be passed through the inline assembly to prevent
415 * LLVM from hoisting calls to ReadNone functions.
418 ac_build_optimization_barrier(struct ac_llvm_context
*ctx
,
421 static int counter
= 0;
423 LLVMBuilderRef builder
= ctx
->builder
;
426 snprintf(code
, sizeof(code
), "; %d", p_atomic_inc_return(&counter
));
429 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->voidt
, NULL
, 0, false);
430 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "", true, false);
431 LLVMBuildCall(builder
, inlineasm
, NULL
, 0, "");
433 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->i32
, &ctx
->i32
, 1, false);
434 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "=v,0", true, false);
435 LLVMTypeRef type
= LLVMTypeOf(*pvgpr
);
436 unsigned bitsize
= ac_get_elem_bits(ctx
, type
);
437 LLVMValueRef vgpr
= *pvgpr
;
438 LLVMTypeRef vgpr_type
;
443 vgpr
= LLVMBuildZExt(ctx
->builder
, vgpr
, ctx
->i32
, "");
445 vgpr_type
= LLVMTypeOf(vgpr
);
446 vgpr_size
= ac_get_type_size(vgpr_type
);
448 assert(vgpr_size
% 4 == 0);
450 vgpr
= LLVMBuildBitCast(builder
, vgpr
, LLVMVectorType(ctx
->i32
, vgpr_size
/ 4), "");
451 vgpr0
= LLVMBuildExtractElement(builder
, vgpr
, ctx
->i32_0
, "");
452 vgpr0
= LLVMBuildCall(builder
, inlineasm
, &vgpr0
, 1, "");
453 vgpr
= LLVMBuildInsertElement(builder
, vgpr
, vgpr0
, ctx
->i32_0
, "");
454 vgpr
= LLVMBuildBitCast(builder
, vgpr
, vgpr_type
, "");
457 vgpr
= LLVMBuildTrunc(builder
, vgpr
, type
, "");
464 ac_build_shader_clock(struct ac_llvm_context
*ctx
)
466 const char *intr
= LLVM_VERSION_MAJOR
>= 9 && ctx
->chip_class
>= GFX8
?
467 "llvm.amdgcn.s.memrealtime" : "llvm.readcyclecounter";
468 LLVMValueRef tmp
= ac_build_intrinsic(ctx
, intr
, ctx
->i64
, NULL
, 0, 0);
469 return LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->v2i32
, "");
473 ac_build_ballot(struct ac_llvm_context
*ctx
,
478 if (LLVM_VERSION_MAJOR
>= 9) {
479 if (ctx
->wave_size
== 64)
480 name
= "llvm.amdgcn.icmp.i64.i32";
482 name
= "llvm.amdgcn.icmp.i32.i32";
484 name
= "llvm.amdgcn.icmp.i32";
486 LLVMValueRef args
[3] = {
489 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0)
492 /* We currently have no other way to prevent LLVM from lifting the icmp
493 * calls to a dominating basic block.
495 ac_build_optimization_barrier(ctx
, &args
[0]);
497 args
[0] = ac_to_integer(ctx
, args
[0]);
499 return ac_build_intrinsic(ctx
, name
, ctx
->iN_wavemask
, args
, 3,
500 AC_FUNC_ATTR_NOUNWIND
|
501 AC_FUNC_ATTR_READNONE
|
502 AC_FUNC_ATTR_CONVERGENT
);
505 LLVMValueRef
ac_get_i1_sgpr_mask(struct ac_llvm_context
*ctx
,
510 if (LLVM_VERSION_MAJOR
>= 9) {
511 if (ctx
->wave_size
== 64)
512 name
= "llvm.amdgcn.icmp.i64.i1";
514 name
= "llvm.amdgcn.icmp.i32.i1";
516 name
= "llvm.amdgcn.icmp.i1";
518 LLVMValueRef args
[3] = {
521 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0),
524 return ac_build_intrinsic(ctx
, name
, ctx
->iN_wavemask
, args
, 3,
525 AC_FUNC_ATTR_NOUNWIND
|
526 AC_FUNC_ATTR_READNONE
|
527 AC_FUNC_ATTR_CONVERGENT
);
531 ac_build_vote_all(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
533 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
534 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
535 return LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, vote_set
, active_set
, "");
539 ac_build_vote_any(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
541 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
542 return LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, vote_set
,
543 LLVMConstInt(ctx
->iN_wavemask
, 0, 0), "");
547 ac_build_vote_eq(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
549 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
550 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
552 LLVMValueRef all
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
553 vote_set
, active_set
, "");
554 LLVMValueRef none
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
556 LLVMConstInt(ctx
->iN_wavemask
, 0, 0), "");
557 return LLVMBuildOr(ctx
->builder
, all
, none
, "");
561 ac_build_varying_gather_values(struct ac_llvm_context
*ctx
, LLVMValueRef
*values
,
562 unsigned value_count
, unsigned component
)
564 LLVMValueRef vec
= NULL
;
566 if (value_count
== 1) {
567 return values
[component
];
568 } else if (!value_count
)
569 unreachable("value_count is 0");
571 for (unsigned i
= component
; i
< value_count
+ component
; i
++) {
572 LLVMValueRef value
= values
[i
];
575 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
576 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
- component
, false);
577 vec
= LLVMBuildInsertElement(ctx
->builder
, vec
, value
, index
, "");
583 ac_build_gather_values_extended(struct ac_llvm_context
*ctx
,
584 LLVMValueRef
*values
,
585 unsigned value_count
,
586 unsigned value_stride
,
590 LLVMBuilderRef builder
= ctx
->builder
;
591 LLVMValueRef vec
= NULL
;
594 if (value_count
== 1 && !always_vector
) {
596 return LLVMBuildLoad(builder
, values
[0], "");
598 } else if (!value_count
)
599 unreachable("value_count is 0");
601 for (i
= 0; i
< value_count
; i
++) {
602 LLVMValueRef value
= values
[i
* value_stride
];
604 value
= LLVMBuildLoad(builder
, value
, "");
607 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
608 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
, false);
609 vec
= LLVMBuildInsertElement(builder
, vec
, value
, index
, "");
615 ac_build_gather_values(struct ac_llvm_context
*ctx
,
616 LLVMValueRef
*values
,
617 unsigned value_count
)
619 return ac_build_gather_values_extended(ctx
, values
, value_count
, 1, false, false);
622 /* Expand a scalar or vector to <dst_channels x type> by filling the remaining
623 * channels with undef. Extract at most src_channels components from the input.
626 ac_build_expand(struct ac_llvm_context
*ctx
,
628 unsigned src_channels
,
629 unsigned dst_channels
)
631 LLVMTypeRef elemtype
;
632 LLVMValueRef chan
[dst_channels
];
634 if (LLVMGetTypeKind(LLVMTypeOf(value
)) == LLVMVectorTypeKind
) {
635 unsigned vec_size
= LLVMGetVectorSize(LLVMTypeOf(value
));
637 if (src_channels
== dst_channels
&& vec_size
== dst_channels
)
640 src_channels
= MIN2(src_channels
, vec_size
);
642 for (unsigned i
= 0; i
< src_channels
; i
++)
643 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
);
645 elemtype
= LLVMGetElementType(LLVMTypeOf(value
));
648 assert(src_channels
== 1);
651 elemtype
= LLVMTypeOf(value
);
654 for (unsigned i
= src_channels
; i
< dst_channels
; i
++)
655 chan
[i
] = LLVMGetUndef(elemtype
);
657 return ac_build_gather_values(ctx
, chan
, dst_channels
);
660 /* Extract components [start, start + channels) from a vector.
663 ac_extract_components(struct ac_llvm_context
*ctx
,
668 LLVMValueRef chan
[channels
];
670 for (unsigned i
= 0; i
< channels
; i
++)
671 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
+ start
);
673 return ac_build_gather_values(ctx
, chan
, channels
);
676 /* Expand a scalar or vector to <4 x type> by filling the remaining channels
677 * with undef. Extract at most num_channels components from the input.
679 LLVMValueRef
ac_build_expand_to_vec4(struct ac_llvm_context
*ctx
,
681 unsigned num_channels
)
683 return ac_build_expand(ctx
, value
, num_channels
, 4);
686 LLVMValueRef
ac_build_round(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
688 unsigned type_size
= ac_get_type_size(LLVMTypeOf(value
));
692 name
= "llvm.rint.f16";
693 else if (type_size
== 4)
694 name
= "llvm.rint.f32";
696 name
= "llvm.rint.f64";
698 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(value
), &value
, 1,
699 AC_FUNC_ATTR_READNONE
);
703 ac_build_fdiv(struct ac_llvm_context
*ctx
,
707 /* If we do (num / den), LLVM >= 7.0 does:
708 * return num * v_rcp_f32(den * (fabs(den) > 0x1.0p+96f ? 0x1.0p-32f : 1.0f));
710 * If we do (num * (1 / den)), LLVM does:
711 * return num * v_rcp_f32(den);
713 LLVMValueRef one
= LLVMConstReal(LLVMTypeOf(num
), 1.0);
714 LLVMValueRef rcp
= LLVMBuildFDiv(ctx
->builder
, one
, den
, "");
715 LLVMValueRef ret
= LLVMBuildFMul(ctx
->builder
, num
, rcp
, "");
717 /* Use v_rcp_f32 instead of precise division. */
718 if (!LLVMIsConstant(ret
))
719 LLVMSetMetadata(ret
, ctx
->fpmath_md_kind
, ctx
->fpmath_md_2p5_ulp
);
723 /* See fast_idiv_by_const.h. */
724 /* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */
725 LLVMValueRef
ac_build_fast_udiv(struct ac_llvm_context
*ctx
,
727 LLVMValueRef multiplier
,
728 LLVMValueRef pre_shift
,
729 LLVMValueRef post_shift
,
730 LLVMValueRef increment
)
732 LLVMBuilderRef builder
= ctx
->builder
;
734 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
735 num
= LLVMBuildMul(builder
,
736 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
737 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
738 num
= LLVMBuildAdd(builder
, num
,
739 LLVMBuildZExt(builder
, increment
, ctx
->i64
, ""), "");
740 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
741 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
742 return LLVMBuildLShr(builder
, num
, post_shift
, "");
745 /* See fast_idiv_by_const.h. */
746 /* If num != UINT_MAX, this more efficient version can be used. */
747 /* Set: increment = util_fast_udiv_info::increment; */
748 LLVMValueRef
ac_build_fast_udiv_nuw(struct ac_llvm_context
*ctx
,
750 LLVMValueRef multiplier
,
751 LLVMValueRef pre_shift
,
752 LLVMValueRef post_shift
,
753 LLVMValueRef increment
)
755 LLVMBuilderRef builder
= ctx
->builder
;
757 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
758 num
= LLVMBuildNUWAdd(builder
, num
, increment
, "");
759 num
= LLVMBuildMul(builder
,
760 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
761 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
762 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
763 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
764 return LLVMBuildLShr(builder
, num
, post_shift
, "");
767 /* See fast_idiv_by_const.h. */
768 /* Both operands must fit in 31 bits and the divisor must not be 1. */
769 LLVMValueRef
ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context
*ctx
,
771 LLVMValueRef multiplier
,
772 LLVMValueRef post_shift
)
774 LLVMBuilderRef builder
= ctx
->builder
;
776 num
= LLVMBuildMul(builder
,
777 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
778 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
779 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
780 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
781 return LLVMBuildLShr(builder
, num
, post_shift
, "");
784 /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
785 * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
786 * already multiplied by two. id is the cube face number.
788 struct cube_selection_coords
{
795 build_cube_intrinsic(struct ac_llvm_context
*ctx
,
797 struct cube_selection_coords
*out
)
799 LLVMTypeRef f32
= ctx
->f32
;
801 out
->stc
[1] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubetc",
802 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
803 out
->stc
[0] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubesc",
804 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
805 out
->ma
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubema",
806 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
807 out
->id
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubeid",
808 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
812 * Build a manual selection sequence for cube face sc/tc coordinates and
813 * major axis vector (multiplied by 2 for consistency) for the given
814 * vec3 \p coords, for the face implied by \p selcoords.
816 * For the major axis, we always adjust the sign to be in the direction of
817 * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
818 * the selcoords major axis.
820 static void build_cube_select(struct ac_llvm_context
*ctx
,
821 const struct cube_selection_coords
*selcoords
,
822 const LLVMValueRef
*coords
,
823 LLVMValueRef
*out_st
,
824 LLVMValueRef
*out_ma
)
826 LLVMBuilderRef builder
= ctx
->builder
;
827 LLVMTypeRef f32
= LLVMTypeOf(coords
[0]);
828 LLVMValueRef is_ma_positive
;
830 LLVMValueRef is_ma_z
, is_not_ma_z
;
831 LLVMValueRef is_ma_y
;
832 LLVMValueRef is_ma_x
;
836 is_ma_positive
= LLVMBuildFCmp(builder
, LLVMRealUGE
,
837 selcoords
->ma
, LLVMConstReal(f32
, 0.0), "");
838 sgn_ma
= LLVMBuildSelect(builder
, is_ma_positive
,
839 LLVMConstReal(f32
, 1.0), LLVMConstReal(f32
, -1.0), "");
841 is_ma_z
= LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 4.0), "");
842 is_not_ma_z
= LLVMBuildNot(builder
, is_ma_z
, "");
843 is_ma_y
= LLVMBuildAnd(builder
, is_not_ma_z
,
844 LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 2.0), ""), "");
845 is_ma_x
= LLVMBuildAnd(builder
, is_not_ma_z
, LLVMBuildNot(builder
, is_ma_y
, ""), "");
848 tmp
= LLVMBuildSelect(builder
, is_ma_x
, coords
[2], coords
[0], "");
849 sgn
= LLVMBuildSelect(builder
, is_ma_y
, LLVMConstReal(f32
, 1.0),
850 LLVMBuildSelect(builder
, is_ma_z
, sgn_ma
,
851 LLVMBuildFNeg(builder
, sgn_ma
, ""), ""), "");
852 out_st
[0] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
855 tmp
= LLVMBuildSelect(builder
, is_ma_y
, coords
[2], coords
[1], "");
856 sgn
= LLVMBuildSelect(builder
, is_ma_y
, sgn_ma
,
857 LLVMConstReal(f32
, -1.0), "");
858 out_st
[1] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
861 tmp
= LLVMBuildSelect(builder
, is_ma_z
, coords
[2],
862 LLVMBuildSelect(builder
, is_ma_y
, coords
[1], coords
[0], ""), "");
863 tmp
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
864 ctx
->f32
, &tmp
, 1, AC_FUNC_ATTR_READNONE
);
865 *out_ma
= LLVMBuildFMul(builder
, tmp
, LLVMConstReal(f32
, 2.0), "");
869 ac_prepare_cube_coords(struct ac_llvm_context
*ctx
,
870 bool is_deriv
, bool is_array
, bool is_lod
,
871 LLVMValueRef
*coords_arg
,
872 LLVMValueRef
*derivs_arg
)
875 LLVMBuilderRef builder
= ctx
->builder
;
876 struct cube_selection_coords selcoords
;
877 LLVMValueRef coords
[3];
880 if (is_array
&& !is_lod
) {
881 LLVMValueRef tmp
= ac_build_round(ctx
, coords_arg
[3]);
883 /* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says:
885 * "For Array forms, the array layer used will be
887 * max(0, min(d−1, floor(layer+0.5)))
889 * where d is the depth of the texture array and layer
890 * comes from the component indicated in the tables below.
891 * Workaroudn for an issue where the layer is taken from a
892 * helper invocation which happens to fall on a different
893 * layer due to extrapolation."
895 * GFX8 and earlier attempt to implement this in hardware by
896 * clamping the value of coords[2] = (8 * layer) + face.
897 * Unfortunately, this means that the we end up with the wrong
898 * face when clamping occurs.
900 * Clamp the layer earlier to work around the issue.
902 if (ctx
->chip_class
<= GFX8
) {
904 ge0
= LLVMBuildFCmp(builder
, LLVMRealOGE
, tmp
, ctx
->f32_0
, "");
905 tmp
= LLVMBuildSelect(builder
, ge0
, tmp
, ctx
->f32_0
, "");
911 build_cube_intrinsic(ctx
, coords_arg
, &selcoords
);
913 invma
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
914 ctx
->f32
, &selcoords
.ma
, 1, AC_FUNC_ATTR_READNONE
);
915 invma
= ac_build_fdiv(ctx
, LLVMConstReal(ctx
->f32
, 1.0), invma
);
917 for (int i
= 0; i
< 2; ++i
)
918 coords
[i
] = LLVMBuildFMul(builder
, selcoords
.stc
[i
], invma
, "");
920 coords
[2] = selcoords
.id
;
922 if (is_deriv
&& derivs_arg
) {
923 LLVMValueRef derivs
[4];
926 /* Convert cube derivatives to 2D derivatives. */
927 for (axis
= 0; axis
< 2; axis
++) {
928 LLVMValueRef deriv_st
[2];
929 LLVMValueRef deriv_ma
;
931 /* Transform the derivative alongside the texture
932 * coordinate. Mathematically, the correct formula is
933 * as follows. Assume we're projecting onto the +Z face
934 * and denote by dx/dh the derivative of the (original)
935 * X texture coordinate with respect to horizontal
936 * window coordinates. The projection onto the +Z face
941 * Then df/dh = df/dx * dx/dh + df/dz * dz/dh
942 * = 1/z * dx/dh - x/z * 1/z * dz/dh.
944 * This motivatives the implementation below.
946 * Whether this actually gives the expected results for
947 * apps that might feed in derivatives obtained via
948 * finite differences is anyone's guess. The OpenGL spec
949 * seems awfully quiet about how textureGrad for cube
950 * maps should be handled.
952 build_cube_select(ctx
, &selcoords
, &derivs_arg
[axis
* 3],
953 deriv_st
, &deriv_ma
);
955 deriv_ma
= LLVMBuildFMul(builder
, deriv_ma
, invma
, "");
957 for (int i
= 0; i
< 2; ++i
)
958 derivs
[axis
* 2 + i
] =
959 LLVMBuildFSub(builder
,
960 LLVMBuildFMul(builder
, deriv_st
[i
], invma
, ""),
961 LLVMBuildFMul(builder
, deriv_ma
, coords
[i
], ""), "");
964 memcpy(derivs_arg
, derivs
, sizeof(derivs
));
967 /* Shift the texture coordinate. This must be applied after the
968 * derivative calculation.
970 for (int i
= 0; i
< 2; ++i
)
971 coords
[i
] = LLVMBuildFAdd(builder
, coords
[i
], LLVMConstReal(ctx
->f32
, 1.5), "");
974 /* for cube arrays coord.z = coord.w(array_index) * 8 + face */
975 /* coords_arg.w component - array_index for cube arrays */
976 coords
[2] = ac_build_fmad(ctx
, coords_arg
[3], LLVMConstReal(ctx
->f32
, 8.0), coords
[2]);
979 memcpy(coords_arg
, coords
, sizeof(coords
));
984 ac_build_fs_interp(struct ac_llvm_context
*ctx
,
985 LLVMValueRef llvm_chan
,
986 LLVMValueRef attr_number
,
991 LLVMValueRef args
[5];
996 args
[2] = attr_number
;
999 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1",
1000 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
1004 args
[2] = llvm_chan
;
1005 args
[3] = attr_number
;
1008 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2",
1009 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
1013 ac_build_fs_interp_f16(struct ac_llvm_context
*ctx
,
1014 LLVMValueRef llvm_chan
,
1015 LLVMValueRef attr_number
,
1016 LLVMValueRef params
,
1020 LLVMValueRef args
[6];
1024 args
[1] = llvm_chan
;
1025 args
[2] = attr_number
;
1026 args
[3] = ctx
->i1false
;
1029 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1.f16",
1030 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
1034 args
[2] = llvm_chan
;
1035 args
[3] = attr_number
;
1036 args
[4] = ctx
->i1false
;
1039 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2.f16",
1040 ctx
->f16
, args
, 6, AC_FUNC_ATTR_READNONE
);
1044 ac_build_fs_interp_mov(struct ac_llvm_context
*ctx
,
1045 LLVMValueRef parameter
,
1046 LLVMValueRef llvm_chan
,
1047 LLVMValueRef attr_number
,
1048 LLVMValueRef params
)
1050 LLVMValueRef args
[4];
1052 args
[0] = parameter
;
1053 args
[1] = llvm_chan
;
1054 args
[2] = attr_number
;
1057 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.mov",
1058 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
1062 ac_build_gep_ptr(struct ac_llvm_context
*ctx
,
1063 LLVMValueRef base_ptr
,
1066 return LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1070 ac_build_gep0(struct ac_llvm_context
*ctx
,
1071 LLVMValueRef base_ptr
,
1074 LLVMValueRef indices
[2] = {
1078 return LLVMBuildGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
1081 LLVMValueRef
ac_build_pointer_add(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
1084 return LLVMBuildPointerCast(ctx
->builder
,
1085 LLVMBuildGEP(ctx
->builder
, ptr
, &index
, 1, ""),
1086 LLVMTypeOf(ptr
), "");
1090 ac_build_indexed_store(struct ac_llvm_context
*ctx
,
1091 LLVMValueRef base_ptr
, LLVMValueRef index
,
1094 LLVMBuildStore(ctx
->builder
, value
,
1095 ac_build_gep0(ctx
, base_ptr
, index
));
1099 * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
1100 * It's equivalent to doing a load from &base_ptr[index].
1102 * \param base_ptr Where the array starts.
1103 * \param index The element index into the array.
1104 * \param uniform Whether the base_ptr and index can be assumed to be
1105 * dynamically uniform (i.e. load to an SGPR)
1106 * \param invariant Whether the load is invariant (no other opcodes affect it)
1107 * \param no_unsigned_wraparound
1108 * For all possible re-associations and re-distributions of an expression
1109 * "base_ptr + index * elemsize" into "addr + offset" (excluding GEPs
1110 * without inbounds in base_ptr), this parameter is true if "addr + offset"
1111 * does not result in an unsigned integer wraparound. This is used for
1112 * optimal code generation of 32-bit pointer arithmetic.
1114 * For example, a 32-bit immediate offset that causes a 32-bit unsigned
1115 * integer wraparound can't be an imm offset in s_load_dword, because
1116 * the instruction performs "addr + offset" in 64 bits.
1118 * Expected usage for bindless textures by chaining GEPs:
1119 * // possible unsigned wraparound, don't use InBounds:
1120 * ptr1 = LLVMBuildGEP(base_ptr, index);
1121 * image = load(ptr1); // becomes "s_load ptr1, 0"
1123 * ptr2 = LLVMBuildInBoundsGEP(ptr1, 32 / elemsize);
1124 * sampler = load(ptr2); // becomes "s_load ptr1, 32" thanks to InBounds
1127 ac_build_load_custom(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1128 LLVMValueRef index
, bool uniform
, bool invariant
,
1129 bool no_unsigned_wraparound
)
1131 LLVMValueRef pointer
, result
;
1133 if (no_unsigned_wraparound
&&
1134 LLVMGetPointerAddressSpace(LLVMTypeOf(base_ptr
)) == AC_ADDR_SPACE_CONST_32BIT
)
1135 pointer
= LLVMBuildInBoundsGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1137 pointer
= LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1140 LLVMSetMetadata(pointer
, ctx
->uniform_md_kind
, ctx
->empty_md
);
1141 result
= LLVMBuildLoad(ctx
->builder
, pointer
, "");
1143 LLVMSetMetadata(result
, ctx
->invariant_load_md_kind
, ctx
->empty_md
);
1147 LLVMValueRef
ac_build_load(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1150 return ac_build_load_custom(ctx
, base_ptr
, index
, false, false, false);
1153 LLVMValueRef
ac_build_load_invariant(struct ac_llvm_context
*ctx
,
1154 LLVMValueRef base_ptr
, LLVMValueRef index
)
1156 return ac_build_load_custom(ctx
, base_ptr
, index
, false, true, false);
1159 /* This assumes that there is no unsigned integer wraparound during the address
1160 * computation, excluding all GEPs within base_ptr. */
1161 LLVMValueRef
ac_build_load_to_sgpr(struct ac_llvm_context
*ctx
,
1162 LLVMValueRef base_ptr
, LLVMValueRef index
)
1164 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, true);
1167 /* See ac_build_load_custom() documentation. */
1168 LLVMValueRef
ac_build_load_to_sgpr_uint_wraparound(struct ac_llvm_context
*ctx
,
1169 LLVMValueRef base_ptr
, LLVMValueRef index
)
1171 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, false);
1174 static unsigned get_load_cache_policy(struct ac_llvm_context
*ctx
,
1175 unsigned cache_policy
)
1177 return cache_policy
|
1178 (ctx
->chip_class
>= GFX10
&& cache_policy
& ac_glc
? ac_dlc
: 0);
1182 ac_build_buffer_store_common(struct ac_llvm_context
*ctx
,
1185 LLVMValueRef vindex
,
1186 LLVMValueRef voffset
,
1187 LLVMValueRef soffset
,
1188 unsigned num_channels
,
1189 LLVMTypeRef return_channel_type
,
1190 unsigned cache_policy
,
1194 LLVMValueRef args
[6];
1197 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1199 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1200 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1201 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1202 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
1203 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, use_format
) && num_channels
== 3 ? 4 : num_channels
;
1204 const char *indexing_kind
= structurized
? "struct" : "raw";
1205 char name
[256], type_name
[8];
1207 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(return_channel_type
, func
) : return_channel_type
;
1208 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1211 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.format.%s",
1212 indexing_kind
, type_name
);
1214 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.%s",
1215 indexing_kind
, type_name
);
1218 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
1219 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1223 ac_build_buffer_store_format(struct ac_llvm_context
*ctx
,
1226 LLVMValueRef vindex
,
1227 LLVMValueRef voffset
,
1228 unsigned num_channels
,
1229 unsigned cache_policy
)
1231 ac_build_buffer_store_common(ctx
, rsrc
, data
, vindex
,
1232 voffset
, NULL
, num_channels
,
1233 ctx
->f32
, cache_policy
,
1237 /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
1238 * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
1239 * or v4i32 (num_channels=3,4).
1242 ac_build_buffer_store_dword(struct ac_llvm_context
*ctx
,
1245 unsigned num_channels
,
1246 LLVMValueRef voffset
,
1247 LLVMValueRef soffset
,
1248 unsigned inst_offset
,
1249 unsigned cache_policy
)
1251 /* Split 3 channel stores, because only LLVM 9+ support 3-channel
1253 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false)) {
1254 LLVMValueRef v
[3], v01
;
1256 for (int i
= 0; i
< 3; i
++) {
1257 v
[i
] = LLVMBuildExtractElement(ctx
->builder
, vdata
,
1258 LLVMConstInt(ctx
->i32
, i
, 0), "");
1260 v01
= ac_build_gather_values(ctx
, v
, 2);
1262 ac_build_buffer_store_dword(ctx
, rsrc
, v01
, 2, voffset
,
1263 soffset
, inst_offset
, cache_policy
);
1264 ac_build_buffer_store_dword(ctx
, rsrc
, v
[2], 1, voffset
,
1265 soffset
, inst_offset
+ 8,
1270 /* SWIZZLE_ENABLE requires that soffset isn't folded into voffset
1271 * (voffset is swizzled, but soffset isn't swizzled).
1272 * llvm.amdgcn.buffer.store doesn't have a separate soffset parameter.
1274 if (!(cache_policy
& ac_swizzled
)) {
1275 LLVMValueRef offset
= soffset
;
1278 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1279 LLVMConstInt(ctx
->i32
, inst_offset
, 0), "");
1281 ac_build_buffer_store_common(ctx
, rsrc
, ac_to_float(ctx
, vdata
),
1282 ctx
->i32_0
, voffset
, offset
,
1283 num_channels
, ctx
->f32
,
1284 cache_policy
, false, false);
1288 static const unsigned dfmts
[] = {
1289 V_008F0C_BUF_DATA_FORMAT_32
,
1290 V_008F0C_BUF_DATA_FORMAT_32_32
,
1291 V_008F0C_BUF_DATA_FORMAT_32_32_32
,
1292 V_008F0C_BUF_DATA_FORMAT_32_32_32_32
1294 unsigned dfmt
= dfmts
[num_channels
- 1];
1295 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1296 LLVMValueRef immoffset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1298 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1299 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
);
1303 ac_build_buffer_load_common(struct ac_llvm_context
*ctx
,
1305 LLVMValueRef vindex
,
1306 LLVMValueRef voffset
,
1307 LLVMValueRef soffset
,
1308 unsigned num_channels
,
1309 LLVMTypeRef channel_type
,
1310 unsigned cache_policy
,
1315 LLVMValueRef args
[5];
1317 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1319 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1320 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1321 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1322 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1323 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, use_format
) && num_channels
== 3 ? 4 : num_channels
;
1324 const char *indexing_kind
= structurized
? "struct" : "raw";
1325 char name
[256], type_name
[8];
1327 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(channel_type
, func
) : channel_type
;
1328 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1331 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.format.%s",
1332 indexing_kind
, type_name
);
1334 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.%s",
1335 indexing_kind
, type_name
);
1338 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1339 ac_get_load_intr_attribs(can_speculate
));
1343 ac_build_buffer_load(struct ac_llvm_context
*ctx
,
1346 LLVMValueRef vindex
,
1347 LLVMValueRef voffset
,
1348 LLVMValueRef soffset
,
1349 unsigned inst_offset
,
1350 unsigned cache_policy
,
1354 LLVMValueRef offset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1356 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1358 offset
= LLVMBuildAdd(ctx
->builder
, offset
, soffset
, "");
1360 if (allow_smem
&& !(cache_policy
& ac_slc
) &&
1361 (!(cache_policy
& ac_glc
) || ctx
->chip_class
>= GFX8
)) {
1362 assert(vindex
== NULL
);
1364 LLVMValueRef result
[8];
1366 for (int i
= 0; i
< num_channels
; i
++) {
1368 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1369 LLVMConstInt(ctx
->i32
, 4, 0), "");
1371 LLVMValueRef args
[3] = {
1374 LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0),
1376 result
[i
] = ac_build_intrinsic(ctx
,
1377 "llvm.amdgcn.s.buffer.load.f32",
1379 AC_FUNC_ATTR_READNONE
);
1381 if (num_channels
== 1)
1384 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false))
1385 result
[num_channels
++] = LLVMGetUndef(ctx
->f32
);
1386 return ac_build_gather_values(ctx
, result
, num_channels
);
1389 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
,
1391 num_channels
, ctx
->f32
,
1393 can_speculate
, false, false);
1396 LLVMValueRef
ac_build_buffer_load_format(struct ac_llvm_context
*ctx
,
1398 LLVMValueRef vindex
,
1399 LLVMValueRef voffset
,
1400 unsigned num_channels
,
1401 unsigned cache_policy
,
1404 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
, voffset
,
1405 ctx
->i32_0
, num_channels
, ctx
->f32
,
1406 cache_policy
, can_speculate
,
1411 ac_build_tbuffer_load(struct ac_llvm_context
*ctx
,
1413 LLVMValueRef vindex
,
1414 LLVMValueRef voffset
,
1415 LLVMValueRef soffset
,
1416 LLVMValueRef immoffset
,
1417 unsigned num_channels
,
1420 unsigned cache_policy
,
1424 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1426 LLVMValueRef args
[6];
1428 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1430 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1431 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1432 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1433 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
->chip_class
, dfmt
, nfmt
), 0);
1434 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1435 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
1436 const char *indexing_kind
= structurized
? "struct" : "raw";
1437 char name
[256], type_name
[8];
1439 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
1440 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1442 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.load.%s",
1443 indexing_kind
, type_name
);
1445 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1446 ac_get_load_intr_attribs(can_speculate
));
1450 ac_build_struct_tbuffer_load(struct ac_llvm_context
*ctx
,
1452 LLVMValueRef vindex
,
1453 LLVMValueRef voffset
,
1454 LLVMValueRef soffset
,
1455 LLVMValueRef immoffset
,
1456 unsigned num_channels
,
1459 unsigned cache_policy
,
1462 return ac_build_tbuffer_load(ctx
, rsrc
, vindex
, voffset
, soffset
,
1463 immoffset
, num_channels
, dfmt
, nfmt
,
1464 cache_policy
, can_speculate
, true);
1468 ac_build_raw_tbuffer_load(struct ac_llvm_context
*ctx
,
1470 LLVMValueRef voffset
,
1471 LLVMValueRef soffset
,
1472 LLVMValueRef immoffset
,
1473 unsigned num_channels
,
1476 unsigned cache_policy
,
1479 return ac_build_tbuffer_load(ctx
, rsrc
, NULL
, voffset
, soffset
,
1480 immoffset
, num_channels
, dfmt
, nfmt
,
1481 cache_policy
, can_speculate
, false);
1485 ac_build_tbuffer_load_short(struct ac_llvm_context
*ctx
,
1487 LLVMValueRef voffset
,
1488 LLVMValueRef soffset
,
1489 LLVMValueRef immoffset
,
1490 unsigned cache_policy
)
1494 if (LLVM_VERSION_MAJOR
>= 9) {
1495 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1497 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1498 res
= ac_build_buffer_load_common(ctx
, rsrc
, NULL
,
1500 1, ctx
->i16
, cache_policy
,
1501 false, false, false);
1503 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1504 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1506 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1507 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1510 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i16
, "");
1517 ac_build_tbuffer_load_byte(struct ac_llvm_context
*ctx
,
1519 LLVMValueRef voffset
,
1520 LLVMValueRef soffset
,
1521 LLVMValueRef immoffset
,
1522 unsigned cache_policy
)
1526 if (LLVM_VERSION_MAJOR
>= 9) {
1527 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1529 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1530 res
= ac_build_buffer_load_common(ctx
, rsrc
, NULL
,
1532 1, ctx
->i8
, cache_policy
,
1533 false, false, false);
1535 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
1536 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1538 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1539 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1542 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i8
, "");
1549 * Convert an 11- or 10-bit unsigned floating point number to an f32.
1551 * The input exponent is expected to be biased analogous to IEEE-754, i.e. by
1552 * 2^(exp_bits-1) - 1 (as defined in OpenGL and other graphics APIs).
1555 ac_ufN_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned exp_bits
, unsigned mant_bits
)
1557 assert(LLVMTypeOf(src
) == ctx
->i32
);
1560 LLVMValueRef mantissa
;
1561 mantissa
= LLVMBuildAnd(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, (1 << mant_bits
) - 1, false), "");
1563 /* Converting normal numbers is just a shift + correcting the exponent bias */
1564 unsigned normal_shift
= 23 - mant_bits
;
1565 unsigned bias_shift
= 127 - ((1 << (exp_bits
- 1)) - 1);
1566 LLVMValueRef shifted
, normal
;
1568 shifted
= LLVMBuildShl(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, normal_shift
, false), "");
1569 normal
= LLVMBuildAdd(ctx
->builder
, shifted
, LLVMConstInt(ctx
->i32
, bias_shift
<< 23, false), "");
1571 /* Converting nan/inf numbers is the same, but with a different exponent update */
1572 LLVMValueRef naninf
;
1573 naninf
= LLVMBuildOr(ctx
->builder
, normal
, LLVMConstInt(ctx
->i32
, 0xff << 23, false), "");
1575 /* Converting denormals is the complex case: determine the leading zeros of the
1576 * mantissa to obtain the correct shift for the mantissa and exponent correction.
1578 LLVMValueRef denormal
;
1579 LLVMValueRef params
[2] = {
1581 ctx
->i1true
, /* result can be undef when arg is 0 */
1583 LLVMValueRef ctlz
= ac_build_intrinsic(ctx
, "llvm.ctlz.i32", ctx
->i32
,
1584 params
, 2, AC_FUNC_ATTR_READNONE
);
1586 /* Shift such that the leading 1 ends up as the LSB of the exponent field. */
1587 tmp
= LLVMBuildSub(ctx
->builder
, ctlz
, LLVMConstInt(ctx
->i32
, 8, false), "");
1588 denormal
= LLVMBuildShl(ctx
->builder
, mantissa
, tmp
, "");
1590 unsigned denormal_exp
= bias_shift
+ (32 - mant_bits
) - 1;
1591 tmp
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, denormal_exp
, false), ctlz
, "");
1592 tmp
= LLVMBuildShl(ctx
->builder
, tmp
, LLVMConstInt(ctx
->i32
, 23, false), "");
1593 denormal
= LLVMBuildAdd(ctx
->builder
, denormal
, tmp
, "");
1595 /* Select the final result. */
1596 LLVMValueRef result
;
1598 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1599 LLVMConstInt(ctx
->i32
, ((1 << exp_bits
) - 1) << mant_bits
, false), "");
1600 result
= LLVMBuildSelect(ctx
->builder
, tmp
, naninf
, normal
, "");
1602 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1603 LLVMConstInt(ctx
->i32
, 1 << mant_bits
, false), "");
1604 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, denormal
, "");
1606 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, src
, ctx
->i32_0
, "");
1607 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, ctx
->i32_0
, "");
1609 return ac_to_float(ctx
, result
);
1613 * Generate a fully general open coded buffer format fetch with all required
1614 * fixups suitable for vertex fetch, using non-format buffer loads.
1616 * Some combinations of argument values have special interpretations:
1617 * - size = 8 bytes, format = fixed indicates PIPE_FORMAT_R11G11B10_FLOAT
1618 * - size = 8 bytes, format != {float,fixed} indicates a 2_10_10_10 data format
1620 * \param log_size log(size of channel in bytes)
1621 * \param num_channels number of channels (1 to 4)
1622 * \param format AC_FETCH_FORMAT_xxx value
1623 * \param reverse whether XYZ channels are reversed
1624 * \param known_aligned whether the source is known to be aligned to hardware's
1625 * effective element size for loading the given format
1626 * (note: this means dword alignment for 8_8_8_8, 16_16, etc.)
1627 * \param rsrc buffer resource descriptor
1628 * \return the resulting vector of floats or integers bitcast to <4 x i32>
1631 ac_build_opencoded_load_format(struct ac_llvm_context
*ctx
,
1633 unsigned num_channels
,
1638 LLVMValueRef vindex
,
1639 LLVMValueRef voffset
,
1640 LLVMValueRef soffset
,
1641 unsigned cache_policy
,
1645 unsigned load_log_size
= log_size
;
1646 unsigned load_num_channels
= num_channels
;
1647 if (log_size
== 3) {
1649 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1650 load_num_channels
= 2 * num_channels
;
1652 load_num_channels
= 1; /* 10_11_11 or 2_10_10_10 */
1656 int log_recombine
= 0;
1657 if (ctx
->chip_class
== GFX6
&& !known_aligned
) {
1658 /* Avoid alignment restrictions by loading one byte at a time. */
1659 load_num_channels
<<= load_log_size
;
1660 log_recombine
= load_log_size
;
1662 } else if (load_num_channels
== 2 || load_num_channels
== 4) {
1663 log_recombine
= -util_logbase2(load_num_channels
);
1664 load_num_channels
= 1;
1665 load_log_size
+= -log_recombine
;
1668 assert(load_log_size
>= 2 || LLVM_VERSION_MAJOR
>= 9);
1670 LLVMValueRef loads
[32]; /* up to 32 bytes */
1671 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1672 tmp
= LLVMBuildAdd(ctx
->builder
, soffset
,
1673 LLVMConstInt(ctx
->i32
, i
<< load_log_size
, false), "");
1674 LLVMTypeRef channel_type
= load_log_size
== 0 ? ctx
->i8
:
1675 load_log_size
== 1 ? ctx
->i16
: ctx
->i32
;
1676 unsigned num_channels
= 1 << (MAX2(load_log_size
, 2) - 2);
1677 loads
[i
] = ac_build_buffer_load_common(
1678 ctx
, rsrc
, vindex
, voffset
, tmp
,
1679 num_channels
, channel_type
, cache_policy
,
1680 can_speculate
, false, true);
1681 if (load_log_size
>= 2)
1682 loads
[i
] = ac_to_integer(ctx
, loads
[i
]);
1685 if (log_recombine
> 0) {
1686 /* Recombine bytes if necessary (GFX6 only) */
1687 LLVMTypeRef dst_type
= log_recombine
== 2 ? ctx
->i32
: ctx
->i16
;
1689 for (unsigned src
= 0, dst
= 0; src
< load_num_channels
; ++dst
) {
1690 LLVMValueRef accum
= NULL
;
1691 for (unsigned i
= 0; i
< (1 << log_recombine
); ++i
, ++src
) {
1692 tmp
= LLVMBuildZExt(ctx
->builder
, loads
[src
], dst_type
, "");
1696 tmp
= LLVMBuildShl(ctx
->builder
, tmp
,
1697 LLVMConstInt(dst_type
, 8 * i
, false), "");
1698 accum
= LLVMBuildOr(ctx
->builder
, accum
, tmp
, "");
1703 } else if (log_recombine
< 0) {
1704 /* Split vectors of dwords */
1705 if (load_log_size
> 2) {
1706 assert(load_num_channels
== 1);
1707 LLVMValueRef loaded
= loads
[0];
1708 unsigned log_split
= load_log_size
- 2;
1709 log_recombine
+= log_split
;
1710 load_num_channels
= 1 << log_split
;
1712 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1713 tmp
= LLVMConstInt(ctx
->i32
, i
, false);
1714 loads
[i
] = LLVMBuildExtractElement(ctx
->builder
, loaded
, tmp
, "");
1718 /* Further split dwords and shorts if required */
1719 if (log_recombine
< 0) {
1720 for (unsigned src
= load_num_channels
,
1721 dst
= load_num_channels
<< -log_recombine
;
1723 unsigned dst_bits
= 1 << (3 + load_log_size
+ log_recombine
);
1724 LLVMTypeRef dst_type
= LLVMIntTypeInContext(ctx
->context
, dst_bits
);
1725 LLVMValueRef loaded
= loads
[src
- 1];
1726 LLVMTypeRef loaded_type
= LLVMTypeOf(loaded
);
1727 for (unsigned i
= 1 << -log_recombine
; i
> 0; --i
, --dst
) {
1728 tmp
= LLVMConstInt(loaded_type
, dst_bits
* (i
- 1), false);
1729 tmp
= LLVMBuildLShr(ctx
->builder
, loaded
, tmp
, "");
1730 loads
[dst
- 1] = LLVMBuildTrunc(ctx
->builder
, tmp
, dst_type
, "");
1736 if (log_size
== 3) {
1737 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1738 for (unsigned i
= 0; i
< num_channels
; ++i
) {
1739 tmp
= ac_build_gather_values(ctx
, &loads
[2 * i
], 2);
1740 loads
[i
] = LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->f64
, "");
1742 } else if (format
== AC_FETCH_FORMAT_FIXED
) {
1743 /* 10_11_11_FLOAT */
1744 LLVMValueRef data
= loads
[0];
1745 LLVMValueRef i32_2047
= LLVMConstInt(ctx
->i32
, 2047, false);
1746 LLVMValueRef r
= LLVMBuildAnd(ctx
->builder
, data
, i32_2047
, "");
1747 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 11, false), "");
1748 LLVMValueRef g
= LLVMBuildAnd(ctx
->builder
, tmp
, i32_2047
, "");
1749 LLVMValueRef b
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 22, false), "");
1751 loads
[0] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, r
, 5, 6));
1752 loads
[1] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, g
, 5, 6));
1753 loads
[2] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, b
, 5, 5));
1757 format
= AC_FETCH_FORMAT_FLOAT
;
1759 /* 2_10_10_10 data formats */
1760 LLVMValueRef data
= loads
[0];
1761 LLVMTypeRef i10
= LLVMIntTypeInContext(ctx
->context
, 10);
1762 LLVMTypeRef i2
= LLVMIntTypeInContext(ctx
->context
, 2);
1763 loads
[0] = LLVMBuildTrunc(ctx
->builder
, data
, i10
, "");
1764 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 10, false), "");
1765 loads
[1] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1766 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 20, false), "");
1767 loads
[2] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1768 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 30, false), "");
1769 loads
[3] = LLVMBuildTrunc(ctx
->builder
, tmp
, i2
, "");
1775 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1776 if (log_size
!= 2) {
1777 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1778 tmp
= ac_to_float(ctx
, loads
[chan
]);
1780 tmp
= LLVMBuildFPTrunc(ctx
->builder
, tmp
, ctx
->f32
, "");
1781 else if (log_size
== 1)
1782 tmp
= LLVMBuildFPExt(ctx
->builder
, tmp
, ctx
->f32
, "");
1783 loads
[chan
] = ac_to_integer(ctx
, tmp
);
1786 } else if (format
== AC_FETCH_FORMAT_UINT
) {
1787 if (log_size
!= 2) {
1788 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1789 loads
[chan
] = LLVMBuildZExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1791 } else if (format
== AC_FETCH_FORMAT_SINT
) {
1792 if (log_size
!= 2) {
1793 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1794 loads
[chan
] = LLVMBuildSExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1797 bool unsign
= format
== AC_FETCH_FORMAT_UNORM
||
1798 format
== AC_FETCH_FORMAT_USCALED
||
1799 format
== AC_FETCH_FORMAT_UINT
;
1801 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1803 tmp
= LLVMBuildUIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1805 tmp
= LLVMBuildSIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1808 LLVMValueRef scale
= NULL
;
1809 if (format
== AC_FETCH_FORMAT_FIXED
) {
1810 assert(log_size
== 2);
1811 scale
= LLVMConstReal(ctx
->f32
, 1.0 / 0x10000);
1812 } else if (format
== AC_FETCH_FORMAT_UNORM
) {
1813 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1814 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << bits
) - 1));
1815 } else if (format
== AC_FETCH_FORMAT_SNORM
) {
1816 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1817 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << (bits
- 1)) - 1));
1820 tmp
= LLVMBuildFMul(ctx
->builder
, tmp
, scale
, "");
1822 if (format
== AC_FETCH_FORMAT_SNORM
) {
1823 /* Clamp to [-1, 1] */
1824 LLVMValueRef neg_one
= LLVMConstReal(ctx
->f32
, -1.0);
1825 LLVMValueRef clamp
=
1826 LLVMBuildFCmp(ctx
->builder
, LLVMRealULT
, tmp
, neg_one
, "");
1827 tmp
= LLVMBuildSelect(ctx
->builder
, clamp
, neg_one
, tmp
, "");
1830 loads
[chan
] = ac_to_integer(ctx
, tmp
);
1834 while (num_channels
< 4) {
1835 if (format
== AC_FETCH_FORMAT_UINT
|| format
== AC_FETCH_FORMAT_SINT
) {
1836 loads
[num_channels
] = num_channels
== 3 ? ctx
->i32_1
: ctx
->i32_0
;
1838 loads
[num_channels
] = ac_to_integer(ctx
, num_channels
== 3 ? ctx
->f32_1
: ctx
->f32_0
);
1845 loads
[0] = loads
[2];
1849 return ac_build_gather_values(ctx
, loads
, 4);
1853 ac_build_tbuffer_store(struct ac_llvm_context
*ctx
,
1856 LLVMValueRef vindex
,
1857 LLVMValueRef voffset
,
1858 LLVMValueRef soffset
,
1859 LLVMValueRef immoffset
,
1860 unsigned num_channels
,
1863 unsigned cache_policy
,
1866 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
? voffset
: ctx
->i32_0
,
1869 LLVMValueRef args
[7];
1871 args
[idx
++] = vdata
;
1872 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1874 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1875 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1876 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1877 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
->chip_class
, dfmt
, nfmt
), 0);
1878 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
1879 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
1880 const char *indexing_kind
= structurized
? "struct" : "raw";
1881 char name
[256], type_name
[8];
1883 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
1884 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1886 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.store.%s",
1887 indexing_kind
, type_name
);
1889 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
1890 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1894 ac_build_struct_tbuffer_store(struct ac_llvm_context
*ctx
,
1897 LLVMValueRef vindex
,
1898 LLVMValueRef voffset
,
1899 LLVMValueRef soffset
,
1900 LLVMValueRef immoffset
,
1901 unsigned num_channels
,
1904 unsigned cache_policy
)
1906 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, vindex
, voffset
, soffset
,
1907 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
1912 ac_build_raw_tbuffer_store(struct ac_llvm_context
*ctx
,
1915 LLVMValueRef voffset
,
1916 LLVMValueRef soffset
,
1917 LLVMValueRef immoffset
,
1918 unsigned num_channels
,
1921 unsigned cache_policy
)
1923 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, NULL
, voffset
, soffset
,
1924 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
1929 ac_build_tbuffer_store_short(struct ac_llvm_context
*ctx
,
1932 LLVMValueRef voffset
,
1933 LLVMValueRef soffset
,
1934 unsigned cache_policy
)
1936 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i16
, "");
1938 if (LLVM_VERSION_MAJOR
>= 9) {
1939 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1940 ac_build_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
1941 voffset
, soffset
, 1,
1942 ctx
->i16
, cache_policy
,
1945 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1946 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1948 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
1950 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1951 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
1956 ac_build_tbuffer_store_byte(struct ac_llvm_context
*ctx
,
1959 LLVMValueRef voffset
,
1960 LLVMValueRef soffset
,
1961 unsigned cache_policy
)
1963 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i8
, "");
1965 if (LLVM_VERSION_MAJOR
>= 9) {
1966 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1967 ac_build_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
1968 voffset
, soffset
, 1,
1969 ctx
->i8
, cache_policy
,
1972 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
1973 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1975 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
1977 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1978 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
1982 * Set range metadata on an instruction. This can only be used on load and
1983 * call instructions. If you know an instruction can only produce the values
1984 * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
1985 * \p lo is the minimum value inclusive.
1986 * \p hi is the maximum value exclusive.
1988 static void set_range_metadata(struct ac_llvm_context
*ctx
,
1989 LLVMValueRef value
, unsigned lo
, unsigned hi
)
1991 LLVMValueRef range_md
, md_args
[2];
1992 LLVMTypeRef type
= LLVMTypeOf(value
);
1993 LLVMContextRef context
= LLVMGetTypeContext(type
);
1995 md_args
[0] = LLVMConstInt(type
, lo
, false);
1996 md_args
[1] = LLVMConstInt(type
, hi
, false);
1997 range_md
= LLVMMDNodeInContext(context
, md_args
, 2);
1998 LLVMSetMetadata(value
, ctx
->range_md_kind
, range_md
);
2002 ac_get_thread_id(struct ac_llvm_context
*ctx
)
2006 LLVMValueRef tid_args
[2];
2007 tid_args
[0] = LLVMConstInt(ctx
->i32
, 0xffffffff, false);
2008 tid_args
[1] = ctx
->i32_0
;
2009 tid_args
[1] = ac_build_intrinsic(ctx
,
2010 "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
2011 tid_args
, 2, AC_FUNC_ATTR_READNONE
);
2013 if (ctx
->wave_size
== 32) {
2016 tid
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi",
2018 2, AC_FUNC_ATTR_READNONE
);
2020 set_range_metadata(ctx
, tid
, 0, ctx
->wave_size
);
2025 * AMD GCN implements derivatives using the local data store (LDS)
2026 * All writes to the LDS happen in all executing threads at
2027 * the same time. TID is the Thread ID for the current
2028 * thread and is a value between 0 and 63, representing
2029 * the thread's position in the wavefront.
2031 * For the pixel shader threads are grouped into quads of four pixels.
2032 * The TIDs of the pixels of a quad are:
2040 * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
2041 * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
2042 * the current pixel's column, and masking with 0xfffffffe yields the TID
2043 * of the left pixel of the current pixel's row.
2045 * Adding 1 yields the TID of the pixel to the right of the left pixel, and
2046 * adding 2 yields the TID of the pixel below the top pixel.
2049 ac_build_ddxy(struct ac_llvm_context
*ctx
,
2054 unsigned tl_lanes
[4], trbl_lanes
[4];
2055 char name
[32], type
[8];
2056 LLVMValueRef tl
, trbl
;
2057 LLVMTypeRef result_type
;
2058 LLVMValueRef result
;
2060 result_type
= ac_to_float_type(ctx
, LLVMTypeOf(val
));
2062 if (result_type
== ctx
->f16
)
2063 val
= LLVMBuildZExt(ctx
->builder
, val
, ctx
->i32
, "");
2065 for (unsigned i
= 0; i
< 4; ++i
) {
2066 tl_lanes
[i
] = i
& mask
;
2067 trbl_lanes
[i
] = (i
& mask
) + idx
;
2070 tl
= ac_build_quad_swizzle(ctx
, val
,
2071 tl_lanes
[0], tl_lanes
[1],
2072 tl_lanes
[2], tl_lanes
[3]);
2073 trbl
= ac_build_quad_swizzle(ctx
, val
,
2074 trbl_lanes
[0], trbl_lanes
[1],
2075 trbl_lanes
[2], trbl_lanes
[3]);
2077 if (result_type
== ctx
->f16
) {
2078 tl
= LLVMBuildTrunc(ctx
->builder
, tl
, ctx
->i16
, "");
2079 trbl
= LLVMBuildTrunc(ctx
->builder
, trbl
, ctx
->i16
, "");
2082 tl
= LLVMBuildBitCast(ctx
->builder
, tl
, result_type
, "");
2083 trbl
= LLVMBuildBitCast(ctx
->builder
, trbl
, result_type
, "");
2084 result
= LLVMBuildFSub(ctx
->builder
, trbl
, tl
, "");
2086 ac_build_type_name_for_intr(result_type
, type
, sizeof(type
));
2087 snprintf(name
, sizeof(name
), "llvm.amdgcn.wqm.%s", type
);
2089 return ac_build_intrinsic(ctx
, name
, result_type
, &result
, 1, 0);
2093 ac_build_sendmsg(struct ac_llvm_context
*ctx
,
2095 LLVMValueRef wave_id
)
2097 LLVMValueRef args
[2];
2098 args
[0] = LLVMConstInt(ctx
->i32
, msg
, false);
2100 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.sendmsg", ctx
->voidt
, args
, 2, 0);
2104 ac_build_imsb(struct ac_llvm_context
*ctx
,
2106 LLVMTypeRef dst_type
)
2108 LLVMValueRef msb
= ac_build_intrinsic(ctx
, "llvm.amdgcn.sffbh.i32",
2110 AC_FUNC_ATTR_READNONE
);
2112 /* The HW returns the last bit index from MSB, but NIR/TGSI wants
2113 * the index from LSB. Invert it by doing "31 - msb". */
2114 msb
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, 31, false),
2117 LLVMValueRef all_ones
= LLVMConstInt(ctx
->i32
, -1, true);
2118 LLVMValueRef cond
= LLVMBuildOr(ctx
->builder
,
2119 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2120 arg
, ctx
->i32_0
, ""),
2121 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2122 arg
, all_ones
, ""), "");
2124 return LLVMBuildSelect(ctx
->builder
, cond
, all_ones
, msb
, "");
2128 ac_build_umsb(struct ac_llvm_context
*ctx
,
2130 LLVMTypeRef dst_type
)
2132 const char *intrin_name
;
2134 LLVMValueRef highest_bit
;
2138 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(arg
));
2141 intrin_name
= "llvm.ctlz.i64";
2143 highest_bit
= LLVMConstInt(ctx
->i64
, 63, false);
2147 intrin_name
= "llvm.ctlz.i32";
2149 highest_bit
= LLVMConstInt(ctx
->i32
, 31, false);
2153 intrin_name
= "llvm.ctlz.i16";
2155 highest_bit
= LLVMConstInt(ctx
->i16
, 15, false);
2159 intrin_name
= "llvm.ctlz.i8";
2161 highest_bit
= LLVMConstInt(ctx
->i8
, 7, false);
2165 unreachable(!"invalid bitsize");
2169 LLVMValueRef params
[2] = {
2174 LLVMValueRef msb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
2176 AC_FUNC_ATTR_READNONE
);
2178 /* The HW returns the last bit index from MSB, but TGSI/NIR wants
2179 * the index from LSB. Invert it by doing "31 - msb". */
2180 msb
= LLVMBuildSub(ctx
->builder
, highest_bit
, msb
, "");
2182 if (bitsize
== 64) {
2183 msb
= LLVMBuildTrunc(ctx
->builder
, msb
, ctx
->i32
, "");
2184 } else if (bitsize
< 32) {
2185 msb
= LLVMBuildSExt(ctx
->builder
, msb
, ctx
->i32
, "");
2188 /* check for zero */
2189 return LLVMBuildSelect(ctx
->builder
,
2190 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, arg
, zero
, ""),
2191 LLVMConstInt(ctx
->i32
, -1, true), msb
, "");
2194 LLVMValueRef
ac_build_fmin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2198 snprintf(name
, sizeof(name
), "llvm.minnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
2199 LLVMValueRef args
[2] = {a
, b
};
2200 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2201 AC_FUNC_ATTR_READNONE
);
2204 LLVMValueRef
ac_build_fmax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2208 snprintf(name
, sizeof(name
), "llvm.maxnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
2209 LLVMValueRef args
[2] = {a
, b
};
2210 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2211 AC_FUNC_ATTR_READNONE
);
2214 LLVMValueRef
ac_build_imin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2217 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSLE
, a
, b
, "");
2218 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2221 LLVMValueRef
ac_build_imax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2224 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, a
, b
, "");
2225 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2228 LLVMValueRef
ac_build_umin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2231 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntULE
, a
, b
, "");
2232 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2235 LLVMValueRef
ac_build_umax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2238 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, a
, b
, "");
2239 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2242 LLVMValueRef
ac_build_clamp(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
2244 LLVMTypeRef t
= LLVMTypeOf(value
);
2245 return ac_build_fmin(ctx
, ac_build_fmax(ctx
, value
, LLVMConstReal(t
, 0.0)),
2246 LLVMConstReal(t
, 1.0));
2249 void ac_build_export(struct ac_llvm_context
*ctx
, struct ac_export_args
*a
)
2251 LLVMValueRef args
[9];
2253 args
[0] = LLVMConstInt(ctx
->i32
, a
->target
, 0);
2254 args
[1] = LLVMConstInt(ctx
->i32
, a
->enabled_channels
, 0);
2257 LLVMTypeRef i16
= LLVMInt16TypeInContext(ctx
->context
);
2258 LLVMTypeRef v2i16
= LLVMVectorType(i16
, 2);
2260 args
[2] = LLVMBuildBitCast(ctx
->builder
, a
->out
[0],
2262 args
[3] = LLVMBuildBitCast(ctx
->builder
, a
->out
[1],
2264 args
[4] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2265 args
[5] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2267 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.compr.v2i16",
2268 ctx
->voidt
, args
, 6, 0);
2270 args
[2] = a
->out
[0];
2271 args
[3] = a
->out
[1];
2272 args
[4] = a
->out
[2];
2273 args
[5] = a
->out
[3];
2274 args
[6] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2275 args
[7] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2277 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.f32",
2278 ctx
->voidt
, args
, 8, 0);
2282 void ac_build_export_null(struct ac_llvm_context
*ctx
)
2284 struct ac_export_args args
;
2286 args
.enabled_channels
= 0x0; /* enabled channels */
2287 args
.valid_mask
= 1; /* whether the EXEC mask is valid */
2288 args
.done
= 1; /* DONE bit */
2289 args
.target
= V_008DFC_SQ_EXP_NULL
;
2290 args
.compr
= 0; /* COMPR flag (0 = 32-bit export) */
2291 args
.out
[0] = LLVMGetUndef(ctx
->f32
); /* R */
2292 args
.out
[1] = LLVMGetUndef(ctx
->f32
); /* G */
2293 args
.out
[2] = LLVMGetUndef(ctx
->f32
); /* B */
2294 args
.out
[3] = LLVMGetUndef(ctx
->f32
); /* A */
2296 ac_build_export(ctx
, &args
);
2299 static unsigned ac_num_coords(enum ac_image_dim dim
)
2305 case ac_image_1darray
:
2309 case ac_image_2darray
:
2310 case ac_image_2dmsaa
:
2312 case ac_image_2darraymsaa
:
2315 unreachable("ac_num_coords: bad dim");
2319 static unsigned ac_num_derivs(enum ac_image_dim dim
)
2323 case ac_image_1darray
:
2326 case ac_image_2darray
:
2331 case ac_image_2dmsaa
:
2332 case ac_image_2darraymsaa
:
2334 unreachable("derivatives not supported");
2338 static const char *get_atomic_name(enum ac_atomic_op op
)
2341 case ac_atomic_swap
: return "swap";
2342 case ac_atomic_add
: return "add";
2343 case ac_atomic_sub
: return "sub";
2344 case ac_atomic_smin
: return "smin";
2345 case ac_atomic_umin
: return "umin";
2346 case ac_atomic_smax
: return "smax";
2347 case ac_atomic_umax
: return "umax";
2348 case ac_atomic_and
: return "and";
2349 case ac_atomic_or
: return "or";
2350 case ac_atomic_xor
: return "xor";
2351 case ac_atomic_inc_wrap
: return "inc";
2352 case ac_atomic_dec_wrap
: return "dec";
2354 unreachable("bad atomic op");
2357 LLVMValueRef
ac_build_image_opcode(struct ac_llvm_context
*ctx
,
2358 struct ac_image_args
*a
)
2360 const char *overload
[3] = { "", "", "" };
2361 unsigned num_overloads
= 0;
2362 LLVMValueRef args
[18];
2363 unsigned num_args
= 0;
2364 enum ac_image_dim dim
= a
->dim
;
2366 assert(!a
->lod
|| a
->lod
== ctx
->i32_0
|| a
->lod
== ctx
->f32_0
||
2368 assert((a
->opcode
!= ac_image_get_resinfo
&& a
->opcode
!= ac_image_load_mip
&&
2369 a
->opcode
!= ac_image_store_mip
) ||
2371 assert(a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2372 (!a
->compare
&& !a
->offset
));
2373 assert((a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2374 a
->opcode
== ac_image_get_lod
) ||
2376 assert((a
->bias
? 1 : 0) +
2378 (a
->level_zero
? 1 : 0) +
2379 (a
->derivs
[0] ? 1 : 0) <= 1);
2381 if (a
->opcode
== ac_image_get_lod
) {
2383 case ac_image_1darray
:
2386 case ac_image_2darray
:
2395 bool sample
= a
->opcode
== ac_image_sample
||
2396 a
->opcode
== ac_image_gather4
||
2397 a
->opcode
== ac_image_get_lod
;
2398 bool atomic
= a
->opcode
== ac_image_atomic
||
2399 a
->opcode
== ac_image_atomic_cmpswap
;
2400 bool load
= a
->opcode
== ac_image_sample
||
2401 a
->opcode
== ac_image_gather4
||
2402 a
->opcode
== ac_image_load
||
2403 a
->opcode
== ac_image_load_mip
;
2404 LLVMTypeRef coord_type
= sample
? ctx
->f32
: ctx
->i32
;
2406 if (atomic
|| a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
) {
2407 args
[num_args
++] = a
->data
[0];
2408 if (a
->opcode
== ac_image_atomic_cmpswap
)
2409 args
[num_args
++] = a
->data
[1];
2413 args
[num_args
++] = LLVMConstInt(ctx
->i32
, a
->dmask
, false);
2416 args
[num_args
++] = ac_to_integer(ctx
, a
->offset
);
2418 args
[num_args
++] = ac_to_float(ctx
, a
->bias
);
2419 overload
[num_overloads
++] = ".f32";
2422 args
[num_args
++] = ac_to_float(ctx
, a
->compare
);
2424 unsigned count
= ac_num_derivs(dim
);
2425 for (unsigned i
= 0; i
< count
; ++i
)
2426 args
[num_args
++] = ac_to_float(ctx
, a
->derivs
[i
]);
2427 overload
[num_overloads
++] = ".f32";
2429 unsigned num_coords
=
2430 a
->opcode
!= ac_image_get_resinfo
? ac_num_coords(dim
) : 0;
2431 for (unsigned i
= 0; i
< num_coords
; ++i
)
2432 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->coords
[i
], coord_type
, "");
2434 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->lod
, coord_type
, "");
2435 overload
[num_overloads
++] = sample
? ".f32" : ".i32";
2437 args
[num_args
++] = a
->resource
;
2439 args
[num_args
++] = a
->sampler
;
2440 args
[num_args
++] = LLVMConstInt(ctx
->i1
, a
->unorm
, false);
2443 args
[num_args
++] = ctx
->i32_0
; /* texfailctrl */
2444 args
[num_args
++] = LLVMConstInt(ctx
->i32
,
2445 load
? get_load_cache_policy(ctx
, a
->cache_policy
) :
2446 a
->cache_policy
, false);
2449 const char *atomic_subop
= "";
2450 switch (a
->opcode
) {
2451 case ac_image_sample
: name
= "sample"; break;
2452 case ac_image_gather4
: name
= "gather4"; break;
2453 case ac_image_load
: name
= "load"; break;
2454 case ac_image_load_mip
: name
= "load.mip"; break;
2455 case ac_image_store
: name
= "store"; break;
2456 case ac_image_store_mip
: name
= "store.mip"; break;
2457 case ac_image_atomic
:
2459 atomic_subop
= get_atomic_name(a
->atomic
);
2461 case ac_image_atomic_cmpswap
:
2463 atomic_subop
= "cmpswap";
2465 case ac_image_get_lod
: name
= "getlod"; break;
2466 case ac_image_get_resinfo
: name
= "getresinfo"; break;
2467 default: unreachable("invalid image opcode");
2470 const char *dimname
;
2472 case ac_image_1d
: dimname
= "1d"; break;
2473 case ac_image_2d
: dimname
= "2d"; break;
2474 case ac_image_3d
: dimname
= "3d"; break;
2475 case ac_image_cube
: dimname
= "cube"; break;
2476 case ac_image_1darray
: dimname
= "1darray"; break;
2477 case ac_image_2darray
: dimname
= "2darray"; break;
2478 case ac_image_2dmsaa
: dimname
= "2dmsaa"; break;
2479 case ac_image_2darraymsaa
: dimname
= "2darraymsaa"; break;
2480 default: unreachable("invalid dim");
2484 a
->lod
&& (a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
);
2486 snprintf(intr_name
, sizeof(intr_name
),
2487 "llvm.amdgcn.image.%s%s" /* base name */
2488 "%s%s%s" /* sample/gather modifiers */
2489 ".%s.%s%s%s%s", /* dimension and type overloads */
2491 a
->compare
? ".c" : "",
2494 a
->derivs
[0] ? ".d" :
2495 a
->level_zero
? ".lz" : "",
2496 a
->offset
? ".o" : "",
2498 atomic
? "i32" : "v4f32",
2499 overload
[0], overload
[1], overload
[2]);
2504 else if (a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
)
2509 LLVMValueRef result
=
2510 ac_build_intrinsic(ctx
, intr_name
, retty
, args
, num_args
,
2512 if (!sample
&& retty
== ctx
->v4f32
) {
2513 result
= LLVMBuildBitCast(ctx
->builder
, result
,
2519 LLVMValueRef
ac_build_image_get_sample_count(struct ac_llvm_context
*ctx
,
2522 LLVMValueRef samples
;
2524 /* Read the samples from the descriptor directly.
2525 * Hardware doesn't have any instruction for this.
2527 samples
= LLVMBuildExtractElement(ctx
->builder
, rsrc
,
2528 LLVMConstInt(ctx
->i32
, 3, 0), "");
2529 samples
= LLVMBuildLShr(ctx
->builder
, samples
,
2530 LLVMConstInt(ctx
->i32
, 16, 0), "");
2531 samples
= LLVMBuildAnd(ctx
->builder
, samples
,
2532 LLVMConstInt(ctx
->i32
, 0xf, 0), "");
2533 samples
= LLVMBuildShl(ctx
->builder
, ctx
->i32_1
,
2538 LLVMValueRef
ac_build_cvt_pkrtz_f16(struct ac_llvm_context
*ctx
,
2539 LLVMValueRef args
[2])
2542 LLVMVectorType(LLVMHalfTypeInContext(ctx
->context
), 2);
2544 return ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pkrtz", v2f16
,
2545 args
, 2, AC_FUNC_ATTR_READNONE
);
2548 LLVMValueRef
ac_build_cvt_pknorm_i16(struct ac_llvm_context
*ctx
,
2549 LLVMValueRef args
[2])
2552 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.i16",
2553 ctx
->v2i16
, args
, 2,
2554 AC_FUNC_ATTR_READNONE
);
2555 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2558 LLVMValueRef
ac_build_cvt_pknorm_u16(struct ac_llvm_context
*ctx
,
2559 LLVMValueRef args
[2])
2562 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.u16",
2563 ctx
->v2i16
, args
, 2,
2564 AC_FUNC_ATTR_READNONE
);
2565 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2568 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2569 LLVMValueRef
ac_build_cvt_pk_i16(struct ac_llvm_context
*ctx
,
2570 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2572 assert(bits
== 8 || bits
== 10 || bits
== 16);
2574 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2575 bits
== 8 ? 127 : bits
== 10 ? 511 : 32767, 0);
2576 LLVMValueRef min_rgb
= LLVMConstInt(ctx
->i32
,
2577 bits
== 8 ? -128 : bits
== 10 ? -512 : -32768, 0);
2578 LLVMValueRef max_alpha
=
2579 bits
!= 10 ? max_rgb
: ctx
->i32_1
;
2580 LLVMValueRef min_alpha
=
2581 bits
!= 10 ? min_rgb
: LLVMConstInt(ctx
->i32
, -2, 0);
2585 for (int i
= 0; i
< 2; i
++) {
2586 bool alpha
= hi
&& i
== 1;
2587 args
[i
] = ac_build_imin(ctx
, args
[i
],
2588 alpha
? max_alpha
: max_rgb
);
2589 args
[i
] = ac_build_imax(ctx
, args
[i
],
2590 alpha
? min_alpha
: min_rgb
);
2595 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.i16",
2596 ctx
->v2i16
, args
, 2,
2597 AC_FUNC_ATTR_READNONE
);
2598 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2601 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2602 LLVMValueRef
ac_build_cvt_pk_u16(struct ac_llvm_context
*ctx
,
2603 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2605 assert(bits
== 8 || bits
== 10 || bits
== 16);
2607 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2608 bits
== 8 ? 255 : bits
== 10 ? 1023 : 65535, 0);
2609 LLVMValueRef max_alpha
=
2610 bits
!= 10 ? max_rgb
: LLVMConstInt(ctx
->i32
, 3, 0);
2614 for (int i
= 0; i
< 2; i
++) {
2615 bool alpha
= hi
&& i
== 1;
2616 args
[i
] = ac_build_umin(ctx
, args
[i
],
2617 alpha
? max_alpha
: max_rgb
);
2622 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.u16",
2623 ctx
->v2i16
, args
, 2,
2624 AC_FUNC_ATTR_READNONE
);
2625 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2628 LLVMValueRef
ac_build_wqm_vote(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2630 return ac_build_intrinsic(ctx
, "llvm.amdgcn.wqm.vote", ctx
->i1
,
2631 &i1
, 1, AC_FUNC_ATTR_READNONE
);
2634 void ac_build_kill_if_false(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2636 ac_build_intrinsic(ctx
, "llvm.amdgcn.kill", ctx
->voidt
,
2640 LLVMValueRef
ac_build_bfe(struct ac_llvm_context
*ctx
, LLVMValueRef input
,
2641 LLVMValueRef offset
, LLVMValueRef width
,
2644 LLVMValueRef args
[] = {
2650 return ac_build_intrinsic(ctx
, is_signed
? "llvm.amdgcn.sbfe.i32" :
2651 "llvm.amdgcn.ubfe.i32",
2652 ctx
->i32
, args
, 3, AC_FUNC_ATTR_READNONE
);
2656 LLVMValueRef
ac_build_imad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2657 LLVMValueRef s1
, LLVMValueRef s2
)
2659 return LLVMBuildAdd(ctx
->builder
,
2660 LLVMBuildMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2663 LLVMValueRef
ac_build_fmad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2664 LLVMValueRef s1
, LLVMValueRef s2
)
2666 /* FMA is better on GFX10, because it has FMA units instead of MUL-ADD units. */
2667 if (ctx
->chip_class
>= GFX10
) {
2668 return ac_build_intrinsic(ctx
, "llvm.fma.f32", ctx
->f32
,
2669 (LLVMValueRef
[]) {s0
, s1
, s2
}, 3,
2670 AC_FUNC_ATTR_READNONE
);
2673 return LLVMBuildFAdd(ctx
->builder
,
2674 LLVMBuildFMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2677 void ac_build_waitcnt(struct ac_llvm_context
*ctx
, unsigned wait_flags
)
2682 unsigned lgkmcnt
= 63;
2683 unsigned vmcnt
= ctx
->chip_class
>= GFX9
? 63 : 15;
2684 unsigned vscnt
= 63;
2686 if (wait_flags
& AC_WAIT_LGKM
)
2688 if (wait_flags
& AC_WAIT_VLOAD
)
2691 if (wait_flags
& AC_WAIT_VSTORE
) {
2692 if (ctx
->chip_class
>= GFX10
)
2698 /* There is no intrinsic for vscnt(0), so use a fence. */
2699 if ((wait_flags
& AC_WAIT_LGKM
&&
2700 wait_flags
& AC_WAIT_VLOAD
&&
2701 wait_flags
& AC_WAIT_VSTORE
) ||
2703 LLVMBuildFence(ctx
->builder
, LLVMAtomicOrderingRelease
, false, "");
2707 unsigned simm16
= (lgkmcnt
<< 8) |
2708 (7 << 4) | /* expcnt */
2710 ((vmcnt
>> 4) << 14);
2712 LLVMValueRef args
[1] = {
2713 LLVMConstInt(ctx
->i32
, simm16
, false),
2715 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.waitcnt",
2716 ctx
->voidt
, args
, 1, 0);
2719 LLVMValueRef
ac_build_fmed3(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2720 LLVMValueRef src1
, LLVMValueRef src2
,
2726 if (bitsize
== 16) {
2727 intr
= "llvm.amdgcn.fmed3.f16";
2729 } else if (bitsize
== 32) {
2730 intr
= "llvm.amdgcn.fmed3.f32";
2733 intr
= "llvm.amdgcn.fmed3.f64";
2737 LLVMValueRef params
[] = {
2742 return ac_build_intrinsic(ctx
, intr
, type
, params
, 3,
2743 AC_FUNC_ATTR_READNONE
);
2746 LLVMValueRef
ac_build_fract(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2752 if (bitsize
== 16) {
2753 intr
= "llvm.amdgcn.fract.f16";
2755 } else if (bitsize
== 32) {
2756 intr
= "llvm.amdgcn.fract.f32";
2759 intr
= "llvm.amdgcn.fract.f64";
2763 LLVMValueRef params
[] = {
2766 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
2767 AC_FUNC_ATTR_READNONE
);
2770 LLVMValueRef
ac_build_isign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2773 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->context
, bitsize
);
2774 LLVMValueRef zero
= LLVMConstInt(type
, 0, false);
2775 LLVMValueRef one
= LLVMConstInt(type
, 1, false);
2777 LLVMValueRef cmp
, val
;
2778 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, src0
, zero
, "");
2779 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2780 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGE
, val
, zero
, "");
2781 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstInt(type
, -1, true), "");
2785 LLVMValueRef
ac_build_fsign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2788 LLVMValueRef cmp
, val
, zero
, one
;
2791 if (bitsize
== 16) {
2795 } else if (bitsize
== 32) {
2805 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGT
, src0
, zero
, "");
2806 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2807 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGE
, val
, zero
, "");
2808 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstReal(type
, -1.0), "");
2812 LLVMValueRef
ac_build_bit_count(struct ac_llvm_context
*ctx
, LLVMValueRef src0
)
2814 LLVMValueRef result
;
2817 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2821 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i64", ctx
->i64
,
2822 (LLVMValueRef
[]) { src0
}, 1,
2823 AC_FUNC_ATTR_READNONE
);
2825 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2828 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i32", ctx
->i32
,
2829 (LLVMValueRef
[]) { src0
}, 1,
2830 AC_FUNC_ATTR_READNONE
);
2833 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i16", ctx
->i16
,
2834 (LLVMValueRef
[]) { src0
}, 1,
2835 AC_FUNC_ATTR_READNONE
);
2837 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2840 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i8", ctx
->i8
,
2841 (LLVMValueRef
[]) { src0
}, 1,
2842 AC_FUNC_ATTR_READNONE
);
2844 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2847 unreachable(!"invalid bitsize");
2854 LLVMValueRef
ac_build_bitfield_reverse(struct ac_llvm_context
*ctx
,
2857 LLVMValueRef result
;
2860 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2864 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i64", ctx
->i64
,
2865 (LLVMValueRef
[]) { src0
}, 1,
2866 AC_FUNC_ATTR_READNONE
);
2868 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2871 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i32", ctx
->i32
,
2872 (LLVMValueRef
[]) { src0
}, 1,
2873 AC_FUNC_ATTR_READNONE
);
2876 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i16", ctx
->i16
,
2877 (LLVMValueRef
[]) { src0
}, 1,
2878 AC_FUNC_ATTR_READNONE
);
2880 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2883 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i8", ctx
->i8
,
2884 (LLVMValueRef
[]) { src0
}, 1,
2885 AC_FUNC_ATTR_READNONE
);
2887 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
2890 unreachable(!"invalid bitsize");
2897 #define AC_EXP_TARGET 0
2898 #define AC_EXP_ENABLED_CHANNELS 1
2899 #define AC_EXP_OUT0 2
2907 struct ac_vs_exp_chan
2911 enum ac_ir_type type
;
2914 struct ac_vs_exp_inst
{
2917 struct ac_vs_exp_chan chan
[4];
2920 struct ac_vs_exports
{
2922 struct ac_vs_exp_inst exp
[VARYING_SLOT_MAX
];
2925 /* Return true if the PARAM export has been eliminated. */
2926 static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset
,
2927 uint32_t num_outputs
,
2928 struct ac_vs_exp_inst
*exp
)
2930 unsigned i
, default_val
; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */
2931 bool is_zero
[4] = {}, is_one
[4] = {};
2933 for (i
= 0; i
< 4; i
++) {
2934 /* It's a constant expression. Undef outputs are eliminated too. */
2935 if (exp
->chan
[i
].type
== AC_IR_UNDEF
) {
2938 } else if (exp
->chan
[i
].type
== AC_IR_CONST
) {
2939 if (exp
->chan
[i
].const_float
== 0)
2941 else if (exp
->chan
[i
].const_float
== 1)
2944 return false; /* other constant */
2949 /* Only certain combinations of 0 and 1 can be eliminated. */
2950 if (is_zero
[0] && is_zero
[1] && is_zero
[2])
2951 default_val
= is_zero
[3] ? 0 : 1;
2952 else if (is_one
[0] && is_one
[1] && is_one
[2])
2953 default_val
= is_zero
[3] ? 2 : 3;
2957 /* The PARAM export can be represented as DEFAULT_VAL. Kill it. */
2958 LLVMInstructionEraseFromParent(exp
->inst
);
2960 /* Change OFFSET to DEFAULT_VAL. */
2961 for (i
= 0; i
< num_outputs
; i
++) {
2962 if (vs_output_param_offset
[i
] == exp
->offset
) {
2963 vs_output_param_offset
[i
] =
2964 AC_EXP_PARAM_DEFAULT_VAL_0000
+ default_val
;
2971 static bool ac_eliminate_duplicated_output(struct ac_llvm_context
*ctx
,
2972 uint8_t *vs_output_param_offset
,
2973 uint32_t num_outputs
,
2974 struct ac_vs_exports
*processed
,
2975 struct ac_vs_exp_inst
*exp
)
2977 unsigned p
, copy_back_channels
= 0;
2979 /* See if the output is already in the list of processed outputs.
2980 * The LLVMValueRef comparison relies on SSA.
2982 for (p
= 0; p
< processed
->num
; p
++) {
2983 bool different
= false;
2985 for (unsigned j
= 0; j
< 4; j
++) {
2986 struct ac_vs_exp_chan
*c1
= &processed
->exp
[p
].chan
[j
];
2987 struct ac_vs_exp_chan
*c2
= &exp
->chan
[j
];
2989 /* Treat undef as a match. */
2990 if (c2
->type
== AC_IR_UNDEF
)
2993 /* If c1 is undef but c2 isn't, we can copy c2 to c1
2994 * and consider the instruction duplicated.
2996 if (c1
->type
== AC_IR_UNDEF
) {
2997 copy_back_channels
|= 1 << j
;
3001 /* Test whether the channels are not equal. */
3002 if (c1
->type
!= c2
->type
||
3003 (c1
->type
== AC_IR_CONST
&&
3004 c1
->const_float
!= c2
->const_float
) ||
3005 (c1
->type
== AC_IR_VALUE
&&
3006 c1
->value
!= c2
->value
)) {
3014 copy_back_channels
= 0;
3016 if (p
== processed
->num
)
3019 /* If a match was found, but the matching export has undef where the new
3020 * one has a normal value, copy the normal value to the undef channel.
3022 struct ac_vs_exp_inst
*match
= &processed
->exp
[p
];
3024 /* Get current enabled channels mask. */
3025 LLVMValueRef arg
= LLVMGetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
);
3026 unsigned enabled_channels
= LLVMConstIntGetZExtValue(arg
);
3028 while (copy_back_channels
) {
3029 unsigned chan
= u_bit_scan(©_back_channels
);
3031 assert(match
->chan
[chan
].type
== AC_IR_UNDEF
);
3032 LLVMSetOperand(match
->inst
, AC_EXP_OUT0
+ chan
,
3033 exp
->chan
[chan
].value
);
3034 match
->chan
[chan
] = exp
->chan
[chan
];
3036 /* Update number of enabled channels because the original mask
3037 * is not always 0xf.
3039 enabled_channels
|= (1 << chan
);
3040 LLVMSetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
,
3041 LLVMConstInt(ctx
->i32
, enabled_channels
, 0));
3044 /* The PARAM export is duplicated. Kill it. */
3045 LLVMInstructionEraseFromParent(exp
->inst
);
3047 /* Change OFFSET to the matching export. */
3048 for (unsigned i
= 0; i
< num_outputs
; i
++) {
3049 if (vs_output_param_offset
[i
] == exp
->offset
) {
3050 vs_output_param_offset
[i
] = match
->offset
;
3057 void ac_optimize_vs_outputs(struct ac_llvm_context
*ctx
,
3058 LLVMValueRef main_fn
,
3059 uint8_t *vs_output_param_offset
,
3060 uint32_t num_outputs
,
3061 uint8_t *num_param_exports
)
3063 LLVMBasicBlockRef bb
;
3064 bool removed_any
= false;
3065 struct ac_vs_exports exports
;
3069 /* Process all LLVM instructions. */
3070 bb
= LLVMGetFirstBasicBlock(main_fn
);
3072 LLVMValueRef inst
= LLVMGetFirstInstruction(bb
);
3075 LLVMValueRef cur
= inst
;
3076 inst
= LLVMGetNextInstruction(inst
);
3077 struct ac_vs_exp_inst exp
;
3079 if (LLVMGetInstructionOpcode(cur
) != LLVMCall
)
3082 LLVMValueRef callee
= ac_llvm_get_called_value(cur
);
3084 if (!ac_llvm_is_function(callee
))
3087 const char *name
= LLVMGetValueName(callee
);
3088 unsigned num_args
= LLVMCountParams(callee
);
3090 /* Check if this is an export instruction. */
3091 if ((num_args
!= 9 && num_args
!= 8) ||
3092 (strcmp(name
, "llvm.SI.export") &&
3093 strcmp(name
, "llvm.amdgcn.exp.f32")))
3096 LLVMValueRef arg
= LLVMGetOperand(cur
, AC_EXP_TARGET
);
3097 unsigned target
= LLVMConstIntGetZExtValue(arg
);
3099 if (target
< V_008DFC_SQ_EXP_PARAM
)
3102 target
-= V_008DFC_SQ_EXP_PARAM
;
3104 /* Parse the instruction. */
3105 memset(&exp
, 0, sizeof(exp
));
3106 exp
.offset
= target
;
3109 for (unsigned i
= 0; i
< 4; i
++) {
3110 LLVMValueRef v
= LLVMGetOperand(cur
, AC_EXP_OUT0
+ i
);
3112 exp
.chan
[i
].value
= v
;
3114 if (LLVMIsUndef(v
)) {
3115 exp
.chan
[i
].type
= AC_IR_UNDEF
;
3116 } else if (LLVMIsAConstantFP(v
)) {
3117 LLVMBool loses_info
;
3118 exp
.chan
[i
].type
= AC_IR_CONST
;
3119 exp
.chan
[i
].const_float
=
3120 LLVMConstRealGetDouble(v
, &loses_info
);
3122 exp
.chan
[i
].type
= AC_IR_VALUE
;
3126 /* Eliminate constant and duplicated PARAM exports. */
3127 if (ac_eliminate_const_output(vs_output_param_offset
,
3128 num_outputs
, &exp
) ||
3129 ac_eliminate_duplicated_output(ctx
,
3130 vs_output_param_offset
,
3131 num_outputs
, &exports
,
3135 exports
.exp
[exports
.num
++] = exp
;
3138 bb
= LLVMGetNextBasicBlock(bb
);
3141 /* Remove holes in export memory due to removed PARAM exports.
3142 * This is done by renumbering all PARAM exports.
3145 uint8_t old_offset
[VARYING_SLOT_MAX
];
3148 /* Make a copy of the offsets. We need the old version while
3149 * we are modifying some of them. */
3150 memcpy(old_offset
, vs_output_param_offset
,
3151 sizeof(old_offset
));
3153 for (i
= 0; i
< exports
.num
; i
++) {
3154 unsigned offset
= exports
.exp
[i
].offset
;
3156 /* Update vs_output_param_offset. Multiple outputs can
3157 * have the same offset.
3159 for (out
= 0; out
< num_outputs
; out
++) {
3160 if (old_offset
[out
] == offset
)
3161 vs_output_param_offset
[out
] = i
;
3164 /* Change the PARAM offset in the instruction. */
3165 LLVMSetOperand(exports
.exp
[i
].inst
, AC_EXP_TARGET
,
3166 LLVMConstInt(ctx
->i32
,
3167 V_008DFC_SQ_EXP_PARAM
+ i
, 0));
3169 *num_param_exports
= exports
.num
;
3173 void ac_init_exec_full_mask(struct ac_llvm_context
*ctx
)
3175 LLVMValueRef full_mask
= LLVMConstInt(ctx
->i64
, ~0ull, 0);
3176 ac_build_intrinsic(ctx
,
3177 "llvm.amdgcn.init.exec", ctx
->voidt
,
3178 &full_mask
, 1, AC_FUNC_ATTR_CONVERGENT
);
3181 void ac_declare_lds_as_pointer(struct ac_llvm_context
*ctx
)
3183 unsigned lds_size
= ctx
->chip_class
>= GFX7
? 65536 : 32768;
3184 ctx
->lds
= LLVMBuildIntToPtr(ctx
->builder
, ctx
->i32_0
,
3185 LLVMPointerType(LLVMArrayType(ctx
->i32
, lds_size
/ 4), AC_ADDR_SPACE_LDS
),
3189 LLVMValueRef
ac_lds_load(struct ac_llvm_context
*ctx
,
3190 LLVMValueRef dw_addr
)
3192 return LLVMBuildLoad(ctx
->builder
, ac_build_gep0(ctx
, ctx
->lds
, dw_addr
), "");
3195 void ac_lds_store(struct ac_llvm_context
*ctx
,
3196 LLVMValueRef dw_addr
,
3199 value
= ac_to_integer(ctx
, value
);
3200 ac_build_indexed_store(ctx
, ctx
->lds
,
3204 LLVMValueRef
ac_find_lsb(struct ac_llvm_context
*ctx
,
3205 LLVMTypeRef dst_type
,
3208 unsigned src0_bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
3209 const char *intrin_name
;
3213 switch (src0_bitsize
) {
3215 intrin_name
= "llvm.cttz.i64";
3220 intrin_name
= "llvm.cttz.i32";
3225 intrin_name
= "llvm.cttz.i16";
3230 intrin_name
= "llvm.cttz.i8";
3235 unreachable(!"invalid bitsize");
3238 LLVMValueRef params
[2] = {
3241 /* The value of 1 means that ffs(x=0) = undef, so LLVM won't
3242 * add special code to check for x=0. The reason is that
3243 * the LLVM behavior for x=0 is different from what we
3244 * need here. However, LLVM also assumes that ffs(x) is
3245 * in [0, 31], but GLSL expects that ffs(0) = -1, so
3246 * a conditional assignment to handle 0 is still required.
3248 * The hardware already implements the correct behavior.
3253 LLVMValueRef lsb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
3255 AC_FUNC_ATTR_READNONE
);
3257 if (src0_bitsize
== 64) {
3258 lsb
= LLVMBuildTrunc(ctx
->builder
, lsb
, ctx
->i32
, "");
3259 } else if (src0_bitsize
< 32) {
3260 lsb
= LLVMBuildSExt(ctx
->builder
, lsb
, ctx
->i32
, "");
3263 /* TODO: We need an intrinsic to skip this conditional. */
3264 /* Check for zero: */
3265 return LLVMBuildSelect(ctx
->builder
, LLVMBuildICmp(ctx
->builder
,
3268 LLVMConstInt(ctx
->i32
, -1, 0), lsb
, "");
3271 LLVMTypeRef
ac_array_in_const_addr_space(LLVMTypeRef elem_type
)
3273 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST
);
3276 LLVMTypeRef
ac_array_in_const32_addr_space(LLVMTypeRef elem_type
)
3278 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST_32BIT
);
3281 static struct ac_llvm_flow
*
3282 get_current_flow(struct ac_llvm_context
*ctx
)
3284 if (ctx
->flow
->depth
> 0)
3285 return &ctx
->flow
->stack
[ctx
->flow
->depth
- 1];
3289 static struct ac_llvm_flow
*
3290 get_innermost_loop(struct ac_llvm_context
*ctx
)
3292 for (unsigned i
= ctx
->flow
->depth
; i
> 0; --i
) {
3293 if (ctx
->flow
->stack
[i
- 1].loop_entry_block
)
3294 return &ctx
->flow
->stack
[i
- 1];
3299 static struct ac_llvm_flow
*
3300 push_flow(struct ac_llvm_context
*ctx
)
3302 struct ac_llvm_flow
*flow
;
3304 if (ctx
->flow
->depth
>= ctx
->flow
->depth_max
) {
3305 unsigned new_max
= MAX2(ctx
->flow
->depth
<< 1,
3306 AC_LLVM_INITIAL_CF_DEPTH
);
3308 ctx
->flow
->stack
= realloc(ctx
->flow
->stack
, new_max
* sizeof(*ctx
->flow
->stack
));
3309 ctx
->flow
->depth_max
= new_max
;
3312 flow
= &ctx
->flow
->stack
[ctx
->flow
->depth
];
3315 flow
->next_block
= NULL
;
3316 flow
->loop_entry_block
= NULL
;
3320 static void set_basicblock_name(LLVMBasicBlockRef bb
, const char *base
,
3324 snprintf(buf
, sizeof(buf
), "%s%d", base
, label_id
);
3325 LLVMSetValueName(LLVMBasicBlockAsValue(bb
), buf
);
3328 /* Append a basic block at the level of the parent flow.
3330 static LLVMBasicBlockRef
append_basic_block(struct ac_llvm_context
*ctx
,
3333 assert(ctx
->flow
->depth
>= 1);
3335 if (ctx
->flow
->depth
>= 2) {
3336 struct ac_llvm_flow
*flow
= &ctx
->flow
->stack
[ctx
->flow
->depth
- 2];
3338 return LLVMInsertBasicBlockInContext(ctx
->context
,
3339 flow
->next_block
, name
);
3342 LLVMValueRef main_fn
=
3343 LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx
->builder
));
3344 return LLVMAppendBasicBlockInContext(ctx
->context
, main_fn
, name
);
3347 /* Emit a branch to the given default target for the current block if
3348 * applicable -- that is, if the current block does not already contain a
3349 * branch from a break or continue.
3351 static void emit_default_branch(LLVMBuilderRef builder
,
3352 LLVMBasicBlockRef target
)
3354 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder
)))
3355 LLVMBuildBr(builder
, target
);
3358 void ac_build_bgnloop(struct ac_llvm_context
*ctx
, int label_id
)
3360 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3361 flow
->loop_entry_block
= append_basic_block(ctx
, "LOOP");
3362 flow
->next_block
= append_basic_block(ctx
, "ENDLOOP");
3363 set_basicblock_name(flow
->loop_entry_block
, "loop", label_id
);
3364 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3365 LLVMPositionBuilderAtEnd(ctx
->builder
, flow
->loop_entry_block
);
3368 void ac_build_break(struct ac_llvm_context
*ctx
)
3370 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3371 LLVMBuildBr(ctx
->builder
, flow
->next_block
);
3374 void ac_build_continue(struct ac_llvm_context
*ctx
)
3376 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3377 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3380 void ac_build_else(struct ac_llvm_context
*ctx
, int label_id
)
3382 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3383 LLVMBasicBlockRef endif_block
;
3385 assert(!current_branch
->loop_entry_block
);
3387 endif_block
= append_basic_block(ctx
, "ENDIF");
3388 emit_default_branch(ctx
->builder
, endif_block
);
3390 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3391 set_basicblock_name(current_branch
->next_block
, "else", label_id
);
3393 current_branch
->next_block
= endif_block
;
3396 void ac_build_endif(struct ac_llvm_context
*ctx
, int label_id
)
3398 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3400 assert(!current_branch
->loop_entry_block
);
3402 emit_default_branch(ctx
->builder
, current_branch
->next_block
);
3403 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3404 set_basicblock_name(current_branch
->next_block
, "endif", label_id
);
3409 void ac_build_endloop(struct ac_llvm_context
*ctx
, int label_id
)
3411 struct ac_llvm_flow
*current_loop
= get_current_flow(ctx
);
3413 assert(current_loop
->loop_entry_block
);
3415 emit_default_branch(ctx
->builder
, current_loop
->loop_entry_block
);
3417 LLVMPositionBuilderAtEnd(ctx
->builder
, current_loop
->next_block
);
3418 set_basicblock_name(current_loop
->next_block
, "endloop", label_id
);
3422 void ac_build_ifcc(struct ac_llvm_context
*ctx
, LLVMValueRef cond
, int label_id
)
3424 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3425 LLVMBasicBlockRef if_block
;
3427 if_block
= append_basic_block(ctx
, "IF");
3428 flow
->next_block
= append_basic_block(ctx
, "ELSE");
3429 set_basicblock_name(if_block
, "if", label_id
);
3430 LLVMBuildCondBr(ctx
->builder
, cond
, if_block
, flow
->next_block
);
3431 LLVMPositionBuilderAtEnd(ctx
->builder
, if_block
);
3434 void ac_build_if(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3437 LLVMValueRef cond
= LLVMBuildFCmp(ctx
->builder
, LLVMRealUNE
,
3438 value
, ctx
->f32_0
, "");
3439 ac_build_ifcc(ctx
, cond
, label_id
);
3442 void ac_build_uif(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3445 LLVMValueRef cond
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
3446 ac_to_integer(ctx
, value
),
3448 ac_build_ifcc(ctx
, cond
, label_id
);
3451 LLVMValueRef
ac_build_alloca_undef(struct ac_llvm_context
*ac
, LLVMTypeRef type
,
3454 LLVMBuilderRef builder
= ac
->builder
;
3455 LLVMBasicBlockRef current_block
= LLVMGetInsertBlock(builder
);
3456 LLVMValueRef function
= LLVMGetBasicBlockParent(current_block
);
3457 LLVMBasicBlockRef first_block
= LLVMGetEntryBasicBlock(function
);
3458 LLVMValueRef first_instr
= LLVMGetFirstInstruction(first_block
);
3459 LLVMBuilderRef first_builder
= LLVMCreateBuilderInContext(ac
->context
);
3463 LLVMPositionBuilderBefore(first_builder
, first_instr
);
3465 LLVMPositionBuilderAtEnd(first_builder
, first_block
);
3468 res
= LLVMBuildAlloca(first_builder
, type
, name
);
3469 LLVMDisposeBuilder(first_builder
);
3473 LLVMValueRef
ac_build_alloca(struct ac_llvm_context
*ac
,
3474 LLVMTypeRef type
, const char *name
)
3476 LLVMValueRef ptr
= ac_build_alloca_undef(ac
, type
, name
);
3477 LLVMBuildStore(ac
->builder
, LLVMConstNull(type
), ptr
);
3481 LLVMValueRef
ac_cast_ptr(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
3484 int addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
3485 return LLVMBuildBitCast(ctx
->builder
, ptr
,
3486 LLVMPointerType(type
, addr_space
), "");
3489 LLVMValueRef
ac_trim_vector(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3492 unsigned num_components
= ac_get_llvm_num_components(value
);
3493 if (count
== num_components
)
3496 LLVMValueRef masks
[MAX2(count
, 2)];
3497 masks
[0] = ctx
->i32_0
;
3498 masks
[1] = ctx
->i32_1
;
3499 for (unsigned i
= 2; i
< count
; i
++)
3500 masks
[i
] = LLVMConstInt(ctx
->i32
, i
, false);
3503 return LLVMBuildExtractElement(ctx
->builder
, value
, masks
[0],
3506 LLVMValueRef swizzle
= LLVMConstVector(masks
, count
);
3507 return LLVMBuildShuffleVector(ctx
->builder
, value
, value
, swizzle
, "");
3510 LLVMValueRef
ac_unpack_param(struct ac_llvm_context
*ctx
, LLVMValueRef param
,
3511 unsigned rshift
, unsigned bitwidth
)
3513 LLVMValueRef value
= param
;
3515 value
= LLVMBuildLShr(ctx
->builder
, value
,
3516 LLVMConstInt(ctx
->i32
, rshift
, false), "");
3518 if (rshift
+ bitwidth
< 32) {
3519 unsigned mask
= (1 << bitwidth
) - 1;
3520 value
= LLVMBuildAnd(ctx
->builder
, value
,
3521 LLVMConstInt(ctx
->i32
, mask
, false), "");
3526 /* Adjust the sample index according to FMASK.
3528 * For uncompressed MSAA surfaces, FMASK should return 0x76543210,
3529 * which is the identity mapping. Each nibble says which physical sample
3530 * should be fetched to get that sample.
3532 * For example, 0x11111100 means there are only 2 samples stored and
3533 * the second sample covers 3/4 of the pixel. When reading samples 0
3534 * and 1, return physical sample 0 (determined by the first two 0s
3535 * in FMASK), otherwise return physical sample 1.
3537 * The sample index should be adjusted as follows:
3538 * addr[sample_index] = (fmask >> (addr[sample_index] * 4)) & 0xF;
3540 void ac_apply_fmask_to_sample(struct ac_llvm_context
*ac
, LLVMValueRef fmask
,
3541 LLVMValueRef
*addr
, bool is_array_tex
)
3543 struct ac_image_args fmask_load
= {};
3544 fmask_load
.opcode
= ac_image_load
;
3545 fmask_load
.resource
= fmask
;
3546 fmask_load
.dmask
= 0xf;
3547 fmask_load
.dim
= is_array_tex
? ac_image_2darray
: ac_image_2d
;
3548 fmask_load
.attributes
= AC_FUNC_ATTR_READNONE
;
3550 fmask_load
.coords
[0] = addr
[0];
3551 fmask_load
.coords
[1] = addr
[1];
3553 fmask_load
.coords
[2] = addr
[2];
3555 LLVMValueRef fmask_value
= ac_build_image_opcode(ac
, &fmask_load
);
3556 fmask_value
= LLVMBuildExtractElement(ac
->builder
, fmask_value
,
3559 /* Apply the formula. */
3560 unsigned sample_chan
= is_array_tex
? 3 : 2;
3561 LLVMValueRef final_sample
;
3562 final_sample
= LLVMBuildMul(ac
->builder
, addr
[sample_chan
],
3563 LLVMConstInt(ac
->i32
, 4, 0), "");
3564 final_sample
= LLVMBuildLShr(ac
->builder
, fmask_value
, final_sample
, "");
3565 /* Mask the sample index by 0x7, because 0x8 means an unknown value
3566 * with EQAA, so those will map to 0. */
3567 final_sample
= LLVMBuildAnd(ac
->builder
, final_sample
,
3568 LLVMConstInt(ac
->i32
, 0x7, 0), "");
3570 /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK
3571 * resource descriptor is 0 (invalid).
3574 tmp
= LLVMBuildBitCast(ac
->builder
, fmask
, ac
->v8i32
, "");
3575 tmp
= LLVMBuildExtractElement(ac
->builder
, tmp
, ac
->i32_1
, "");
3576 tmp
= LLVMBuildICmp(ac
->builder
, LLVMIntNE
, tmp
, ac
->i32_0
, "");
3578 /* Replace the MSAA sample index. */
3579 addr
[sample_chan
] = LLVMBuildSelect(ac
->builder
, tmp
, final_sample
,
3580 addr
[sample_chan
], "");
3584 _ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
3586 LLVMTypeRef type
= LLVMTypeOf(src
);
3587 LLVMValueRef result
;
3589 ac_build_optimization_barrier(ctx
, &src
);
3591 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3593 lane
= LLVMBuildZExt(ctx
->builder
, lane
, ctx
->i32
, "");
3595 result
= ac_build_intrinsic(ctx
,
3596 lane
== NULL
? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane",
3597 ctx
->i32
, (LLVMValueRef
[]) { src
, lane
},
3598 lane
== NULL
? 1 : 2,
3599 AC_FUNC_ATTR_READNONE
|
3600 AC_FUNC_ATTR_CONVERGENT
);
3602 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
3606 * Builds the "llvm.amdgcn.readlane" or "llvm.amdgcn.readfirstlane" intrinsic.
3609 * @param lane - id of the lane or NULL for the first active lane
3610 * @return value of the lane
3613 ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
3615 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3616 src
= ac_to_integer(ctx
, src
);
3617 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3621 assert(bits
% 32 == 0);
3622 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3623 LLVMValueRef src_vector
=
3624 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3625 ret
= LLVMGetUndef(vec_type
);
3626 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3627 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3628 LLVMConstInt(ctx
->i32
, i
, 0), "");
3629 LLVMValueRef ret_comp
= _ac_build_readlane(ctx
, src
, lane
);
3630 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
, ret_comp
,
3631 LLVMConstInt(ctx
->i32
, i
, 0), "");
3634 ret
= _ac_build_readlane(ctx
, src
, lane
);
3637 if (LLVMGetTypeKind(src_type
) == LLVMPointerTypeKind
)
3638 return LLVMBuildIntToPtr(ctx
->builder
, ret
, src_type
, "");
3639 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3643 ac_build_writelane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef value
, LLVMValueRef lane
)
3645 return ac_build_intrinsic(ctx
, "llvm.amdgcn.writelane", ctx
->i32
,
3646 (LLVMValueRef
[]) {value
, lane
, src
}, 3,
3647 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3651 ac_build_mbcnt(struct ac_llvm_context
*ctx
, LLVMValueRef mask
)
3653 if (ctx
->wave_size
== 32) {
3654 return ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
3655 (LLVMValueRef
[]) { mask
, ctx
->i32_0
},
3656 2, AC_FUNC_ATTR_READNONE
);
3658 LLVMValueRef mask_vec
= LLVMBuildBitCast(ctx
->builder
, mask
,
3659 LLVMVectorType(ctx
->i32
, 2),
3661 LLVMValueRef mask_lo
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3663 LLVMValueRef mask_hi
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3666 ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
3667 (LLVMValueRef
[]) { mask_lo
, ctx
->i32_0
},
3668 2, AC_FUNC_ATTR_READNONE
);
3669 val
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi", ctx
->i32
,
3670 (LLVMValueRef
[]) { mask_hi
, val
},
3671 2, AC_FUNC_ATTR_READNONE
);
3676 _dpp_quad_perm
= 0x000,
3677 _dpp_row_sl
= 0x100,
3678 _dpp_row_sr
= 0x110,
3679 _dpp_row_rr
= 0x120,
3684 dpp_row_mirror
= 0x140,
3685 dpp_row_half_mirror
= 0x141,
3686 dpp_row_bcast15
= 0x142,
3687 dpp_row_bcast31
= 0x143
3690 static inline enum dpp_ctrl
3691 dpp_quad_perm(unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
3693 assert(lane0
< 4 && lane1
< 4 && lane2
< 4 && lane3
< 4);
3694 return _dpp_quad_perm
| lane0
| (lane1
<< 2) | (lane2
<< 4) | (lane3
<< 6);
3697 static inline enum dpp_ctrl
3698 dpp_row_sl(unsigned amount
)
3700 assert(amount
> 0 && amount
< 16);
3701 return _dpp_row_sl
| amount
;
3704 static inline enum dpp_ctrl
3705 dpp_row_sr(unsigned amount
)
3707 assert(amount
> 0 && amount
< 16);
3708 return _dpp_row_sr
| amount
;
3712 _ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3713 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3716 LLVMTypeRef type
= LLVMTypeOf(src
);
3719 old
= LLVMBuildZExt(ctx
->builder
, old
, ctx
->i32
, "");
3720 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3722 res
= ac_build_intrinsic(ctx
, "llvm.amdgcn.update.dpp.i32", ctx
->i32
,
3725 LLVMConstInt(ctx
->i32
, dpp_ctrl
, 0),
3726 LLVMConstInt(ctx
->i32
, row_mask
, 0),
3727 LLVMConstInt(ctx
->i32
, bank_mask
, 0),
3728 LLVMConstInt(ctx
->i1
, bound_ctrl
, 0) },
3729 6, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3731 return LLVMBuildTrunc(ctx
->builder
, res
, type
, "");
3735 ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3736 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3739 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3740 src
= ac_to_integer(ctx
, src
);
3741 old
= ac_to_integer(ctx
, old
);
3742 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3745 assert(bits
% 32 == 0);
3746 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3747 LLVMValueRef src_vector
=
3748 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3749 LLVMValueRef old_vector
=
3750 LLVMBuildBitCast(ctx
->builder
, old
, vec_type
, "");
3751 ret
= LLVMGetUndef(vec_type
);
3752 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3753 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3754 LLVMConstInt(ctx
->i32
, i
,
3756 old
= LLVMBuildExtractElement(ctx
->builder
, old_vector
,
3757 LLVMConstInt(ctx
->i32
, i
,
3759 LLVMValueRef ret_comp
= _ac_build_dpp(ctx
, old
, src
,
3764 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3766 LLVMConstInt(ctx
->i32
, i
,
3770 ret
= _ac_build_dpp(ctx
, old
, src
, dpp_ctrl
, row_mask
,
3771 bank_mask
, bound_ctrl
);
3773 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3777 _ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3778 bool exchange_rows
, bool bound_ctrl
)
3780 LLVMTypeRef type
= LLVMTypeOf(src
);
3781 LLVMValueRef result
;
3783 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3785 LLVMValueRef args
[6] = {
3788 LLVMConstInt(ctx
->i32
, sel
, false),
3789 LLVMConstInt(ctx
->i32
, sel
>> 32, false),
3790 ctx
->i1true
, /* fi */
3791 bound_ctrl
? ctx
->i1true
: ctx
->i1false
,
3794 result
= ac_build_intrinsic(ctx
, exchange_rows
? "llvm.amdgcn.permlanex16"
3795 : "llvm.amdgcn.permlane16",
3797 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3799 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
3803 ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3804 bool exchange_rows
, bool bound_ctrl
)
3806 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3807 src
= ac_to_integer(ctx
, src
);
3808 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3811 assert(bits
% 32 == 0);
3812 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3813 LLVMValueRef src_vector
=
3814 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3815 ret
= LLVMGetUndef(vec_type
);
3816 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3817 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3818 LLVMConstInt(ctx
->i32
, i
,
3820 LLVMValueRef ret_comp
=
3821 _ac_build_permlane16(ctx
, src
, sel
,
3824 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3826 LLVMConstInt(ctx
->i32
, i
,
3830 ret
= _ac_build_permlane16(ctx
, src
, sel
, exchange_rows
,
3833 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3836 static inline unsigned
3837 ds_pattern_bitmode(unsigned and_mask
, unsigned or_mask
, unsigned xor_mask
)
3839 assert(and_mask
< 32 && or_mask
< 32 && xor_mask
< 32);
3840 return and_mask
| (or_mask
<< 5) | (xor_mask
<< 10);
3844 _ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3846 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3849 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3851 ret
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.swizzle", ctx
->i32
,
3853 src
, LLVMConstInt(ctx
->i32
, mask
, 0) },
3854 2, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3856 return LLVMBuildTrunc(ctx
->builder
, ret
, src_type
, "");
3860 ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3862 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3863 src
= ac_to_integer(ctx
, src
);
3864 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3867 assert(bits
% 32 == 0);
3868 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3869 LLVMValueRef src_vector
=
3870 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3871 ret
= LLVMGetUndef(vec_type
);
3872 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3873 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3874 LLVMConstInt(ctx
->i32
, i
,
3876 LLVMValueRef ret_comp
= _ac_build_ds_swizzle(ctx
, src
,
3878 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3880 LLVMConstInt(ctx
->i32
, i
,
3884 ret
= _ac_build_ds_swizzle(ctx
, src
, mask
);
3886 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3890 ac_build_wwm(struct ac_llvm_context
*ctx
, LLVMValueRef src
)
3892 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3893 unsigned bitsize
= ac_get_elem_bits(ctx
, src_type
);
3894 char name
[32], type
[8];
3897 src
= ac_to_integer(ctx
, src
);
3900 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3902 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3903 snprintf(name
, sizeof(name
), "llvm.amdgcn.wwm.%s", type
);
3904 ret
= ac_build_intrinsic(ctx
, name
, LLVMTypeOf(src
),
3905 (LLVMValueRef
[]) { src
}, 1,
3906 AC_FUNC_ATTR_READNONE
);
3909 ret
= LLVMBuildTrunc(ctx
->builder
, ret
,
3910 ac_to_integer_type(ctx
, src_type
), "");
3912 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3916 ac_build_set_inactive(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
3917 LLVMValueRef inactive
)
3919 char name
[33], type
[8];
3920 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3921 unsigned bitsize
= ac_get_elem_bits(ctx
, src_type
);
3922 src
= ac_to_integer(ctx
, src
);
3923 inactive
= ac_to_integer(ctx
, inactive
);
3926 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
3927 inactive
= LLVMBuildZExt(ctx
->builder
, inactive
, ctx
->i32
, "");
3930 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3931 snprintf(name
, sizeof(name
), "llvm.amdgcn.set.inactive.%s", type
);
3933 ac_build_intrinsic(ctx
, name
,
3934 LLVMTypeOf(src
), (LLVMValueRef
[]) {
3936 AC_FUNC_ATTR_READNONE
|
3937 AC_FUNC_ATTR_CONVERGENT
);
3939 ret
= LLVMBuildTrunc(ctx
->builder
, ret
, src_type
, "");
3945 get_reduction_identity(struct ac_llvm_context
*ctx
, nir_op op
, unsigned type_size
)
3947 if (type_size
== 1) {
3949 case nir_op_iadd
: return ctx
->i8_0
;
3950 case nir_op_imul
: return ctx
->i8_1
;
3951 case nir_op_imin
: return LLVMConstInt(ctx
->i8
, INT8_MAX
, 0);
3952 case nir_op_umin
: return LLVMConstInt(ctx
->i8
, UINT8_MAX
, 0);
3953 case nir_op_imax
: return LLVMConstInt(ctx
->i8
, INT8_MIN
, 0);
3954 case nir_op_umax
: return ctx
->i8_0
;
3955 case nir_op_iand
: return LLVMConstInt(ctx
->i8
, -1, 0);
3956 case nir_op_ior
: return ctx
->i8_0
;
3957 case nir_op_ixor
: return ctx
->i8_0
;
3959 unreachable("bad reduction intrinsic");
3961 } else if (type_size
== 2) {
3963 case nir_op_iadd
: return ctx
->i16_0
;
3964 case nir_op_fadd
: return ctx
->f16_0
;
3965 case nir_op_imul
: return ctx
->i16_1
;
3966 case nir_op_fmul
: return ctx
->f16_1
;
3967 case nir_op_imin
: return LLVMConstInt(ctx
->i16
, INT16_MAX
, 0);
3968 case nir_op_umin
: return LLVMConstInt(ctx
->i16
, UINT16_MAX
, 0);
3969 case nir_op_fmin
: return LLVMConstReal(ctx
->f16
, INFINITY
);
3970 case nir_op_imax
: return LLVMConstInt(ctx
->i16
, INT16_MIN
, 0);
3971 case nir_op_umax
: return ctx
->i16_0
;
3972 case nir_op_fmax
: return LLVMConstReal(ctx
->f16
, -INFINITY
);
3973 case nir_op_iand
: return LLVMConstInt(ctx
->i16
, -1, 0);
3974 case nir_op_ior
: return ctx
->i16_0
;
3975 case nir_op_ixor
: return ctx
->i16_0
;
3977 unreachable("bad reduction intrinsic");
3979 } else if (type_size
== 4) {
3981 case nir_op_iadd
: return ctx
->i32_0
;
3982 case nir_op_fadd
: return ctx
->f32_0
;
3983 case nir_op_imul
: return ctx
->i32_1
;
3984 case nir_op_fmul
: return ctx
->f32_1
;
3985 case nir_op_imin
: return LLVMConstInt(ctx
->i32
, INT32_MAX
, 0);
3986 case nir_op_umin
: return LLVMConstInt(ctx
->i32
, UINT32_MAX
, 0);
3987 case nir_op_fmin
: return LLVMConstReal(ctx
->f32
, INFINITY
);
3988 case nir_op_imax
: return LLVMConstInt(ctx
->i32
, INT32_MIN
, 0);
3989 case nir_op_umax
: return ctx
->i32_0
;
3990 case nir_op_fmax
: return LLVMConstReal(ctx
->f32
, -INFINITY
);
3991 case nir_op_iand
: return LLVMConstInt(ctx
->i32
, -1, 0);
3992 case nir_op_ior
: return ctx
->i32_0
;
3993 case nir_op_ixor
: return ctx
->i32_0
;
3995 unreachable("bad reduction intrinsic");
3997 } else { /* type_size == 64bit */
3999 case nir_op_iadd
: return ctx
->i64_0
;
4000 case nir_op_fadd
: return ctx
->f64_0
;
4001 case nir_op_imul
: return ctx
->i64_1
;
4002 case nir_op_fmul
: return ctx
->f64_1
;
4003 case nir_op_imin
: return LLVMConstInt(ctx
->i64
, INT64_MAX
, 0);
4004 case nir_op_umin
: return LLVMConstInt(ctx
->i64
, UINT64_MAX
, 0);
4005 case nir_op_fmin
: return LLVMConstReal(ctx
->f64
, INFINITY
);
4006 case nir_op_imax
: return LLVMConstInt(ctx
->i64
, INT64_MIN
, 0);
4007 case nir_op_umax
: return ctx
->i64_0
;
4008 case nir_op_fmax
: return LLVMConstReal(ctx
->f64
, -INFINITY
);
4009 case nir_op_iand
: return LLVMConstInt(ctx
->i64
, -1, 0);
4010 case nir_op_ior
: return ctx
->i64_0
;
4011 case nir_op_ixor
: return ctx
->i64_0
;
4013 unreachable("bad reduction intrinsic");
4019 ac_build_alu_op(struct ac_llvm_context
*ctx
, LLVMValueRef lhs
, LLVMValueRef rhs
, nir_op op
)
4021 bool _64bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 8;
4022 bool _32bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 4;
4024 case nir_op_iadd
: return LLVMBuildAdd(ctx
->builder
, lhs
, rhs
, "");
4025 case nir_op_fadd
: return LLVMBuildFAdd(ctx
->builder
, lhs
, rhs
, "");
4026 case nir_op_imul
: return LLVMBuildMul(ctx
->builder
, lhs
, rhs
, "");
4027 case nir_op_fmul
: return LLVMBuildFMul(ctx
->builder
, lhs
, rhs
, "");
4028 case nir_op_imin
: return LLVMBuildSelect(ctx
->builder
,
4029 LLVMBuildICmp(ctx
->builder
, LLVMIntSLT
, lhs
, rhs
, ""),
4031 case nir_op_umin
: return LLVMBuildSelect(ctx
->builder
,
4032 LLVMBuildICmp(ctx
->builder
, LLVMIntULT
, lhs
, rhs
, ""),
4034 case nir_op_fmin
: return ac_build_intrinsic(ctx
,
4035 _64bit
? "llvm.minnum.f64" : _32bit
? "llvm.minnum.f32" : "llvm.minnum.f16",
4036 _64bit
? ctx
->f64
: _32bit
? ctx
->f32
: ctx
->f16
,
4037 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4038 case nir_op_imax
: return LLVMBuildSelect(ctx
->builder
,
4039 LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, lhs
, rhs
, ""),
4041 case nir_op_umax
: return LLVMBuildSelect(ctx
->builder
,
4042 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, lhs
, rhs
, ""),
4044 case nir_op_fmax
: return ac_build_intrinsic(ctx
,
4045 _64bit
? "llvm.maxnum.f64" : _32bit
? "llvm.maxnum.f32" : "llvm.maxnum.f16",
4046 _64bit
? ctx
->f64
: _32bit
? ctx
->f32
: ctx
->f16
,
4047 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4048 case nir_op_iand
: return LLVMBuildAnd(ctx
->builder
, lhs
, rhs
, "");
4049 case nir_op_ior
: return LLVMBuildOr(ctx
->builder
, lhs
, rhs
, "");
4050 case nir_op_ixor
: return LLVMBuildXor(ctx
->builder
, lhs
, rhs
, "");
4052 unreachable("bad reduction intrinsic");
4057 * \param src The value to shift.
4058 * \param identity The value to use the first lane.
4059 * \param maxprefix specifies that the result only needs to be correct for a
4060 * prefix of this many threads
4061 * \return src, shifted 1 lane up, and identity shifted into lane 0.
4064 ac_wavefront_shift_right_1(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4065 LLVMValueRef identity
, unsigned maxprefix
)
4067 if (ctx
->chip_class
>= GFX10
) {
4068 /* wavefront shift_right by 1 on GFX10 (emulate dpp_wf_sr1) */
4069 LLVMValueRef active
, tmp1
, tmp2
;
4070 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4072 tmp1
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
4074 tmp2
= ac_build_permlane16(ctx
, src
, (uint64_t)~0, true, false);
4076 if (maxprefix
> 32) {
4077 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
,
4078 LLVMConstInt(ctx
->i32
, 32, false), "");
4080 tmp2
= LLVMBuildSelect(ctx
->builder
, active
,
4081 ac_build_readlane(ctx
, src
,
4082 LLVMConstInt(ctx
->i32
, 31, false)),
4085 active
= LLVMBuildOr(ctx
->builder
, active
,
4086 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4087 LLVMBuildAnd(ctx
->builder
, tid
,
4088 LLVMConstInt(ctx
->i32
, 0x1f, false), ""),
4089 LLVMConstInt(ctx
->i32
, 0x10, false), ""), "");
4090 return LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4091 } else if (maxprefix
> 16) {
4092 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
,
4093 LLVMConstInt(ctx
->i32
, 16, false), "");
4095 return LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4097 } else if (ctx
->chip_class
>= GFX8
) {
4098 return ac_build_dpp(ctx
, identity
, src
, dpp_wf_sr1
, 0xf, 0xf, false);
4101 /* wavefront shift_right by 1 on SI/CI */
4102 LLVMValueRef active
, tmp1
, tmp2
;
4103 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4104 tmp1
= ac_build_ds_swizzle(ctx
, src
, (1 << 15) | dpp_quad_perm(0, 0, 1, 2));
4105 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x18, 0x03, 0x00));
4106 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4107 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0x7, 0), ""),
4108 LLVMConstInt(ctx
->i32
, 0x4, 0), "");
4109 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4110 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x10, 0x07, 0x00));
4111 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4112 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0xf, 0), ""),
4113 LLVMConstInt(ctx
->i32
, 0x8, 0), "");
4114 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4115 tmp2
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x00, 0x0f, 0x00));
4116 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
4117 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 0x1f, 0), ""),
4118 LLVMConstInt(ctx
->i32
, 0x10, 0), "");
4119 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4120 tmp2
= ac_build_readlane(ctx
, src
, LLVMConstInt(ctx
->i32
, 31, 0));
4121 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
, LLVMConstInt(ctx
->i32
, 32, 0), "");
4122 tmp1
= LLVMBuildSelect(ctx
->builder
, active
, tmp2
, tmp1
, "");
4123 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, tid
, LLVMConstInt(ctx
->i32
, 0, 0), "");
4124 return LLVMBuildSelect(ctx
->builder
, active
, identity
, tmp1
, "");
4128 * \param maxprefix specifies that the result only needs to be correct for a
4129 * prefix of this many threads
4132 ac_build_scan(struct ac_llvm_context
*ctx
, nir_op op
, LLVMValueRef src
, LLVMValueRef identity
,
4133 unsigned maxprefix
, bool inclusive
)
4135 LLVMValueRef result
, tmp
;
4138 src
= ac_wavefront_shift_right_1(ctx
, src
, identity
, maxprefix
);
4142 if (ctx
->chip_class
<= GFX7
) {
4143 assert(maxprefix
== 64);
4144 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4145 LLVMValueRef active
;
4146 tmp
= ac_build_ds_swizzle(ctx
, src
, ds_pattern_bitmode(0x1e, 0x00, 0x00));
4147 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4148 LLVMBuildAnd(ctx
->builder
, tid
, ctx
->i32_1
, ""),
4150 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4151 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4152 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1c, 0x01, 0x00));
4153 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4154 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 2, 0), ""),
4156 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4157 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4158 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x18, 0x03, 0x00));
4159 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4160 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 4, 0), ""),
4162 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4163 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4164 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x10, 0x07, 0x00));
4165 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4166 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 8, 0), ""),
4168 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4169 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4170 tmp
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x00, 0x0f, 0x00));
4171 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4172 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 16, 0), ""),
4174 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4175 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4176 tmp
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, 0));
4177 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4178 LLVMBuildAnd(ctx
->builder
, tid
, LLVMConstInt(ctx
->i32
, 32, 0), ""),
4180 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4181 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4187 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
4188 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4191 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(2), 0xf, 0xf, false);
4192 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4195 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(3), 0xf, 0xf, false);
4196 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4199 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(4), 0xf, 0xe, false);
4200 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4203 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(8), 0xf, 0xc, false);
4204 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4205 if (maxprefix
<= 16)
4208 if (ctx
->chip_class
>= GFX10
) {
4209 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4210 LLVMValueRef active
;
4212 tmp
= ac_build_permlane16(ctx
, result
, ~(uint64_t)0, true, false);
4214 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
4215 LLVMBuildAnd(ctx
->builder
, tid
,
4216 LLVMConstInt(ctx
->i32
, 16, false), ""),
4219 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4221 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4223 if (maxprefix
<= 32)
4226 tmp
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, false));
4228 active
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, tid
,
4229 LLVMConstInt(ctx
->i32
, 32, false), "");
4231 tmp
= LLVMBuildSelect(ctx
->builder
, active
, tmp
, identity
, "");
4233 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4237 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4238 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4239 if (maxprefix
<= 32)
4241 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4242 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4247 ac_build_inclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4249 LLVMValueRef result
;
4251 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4252 LLVMBuilderRef builder
= ctx
->builder
;
4253 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4254 result
= ac_build_ballot(ctx
, src
);
4255 result
= ac_build_mbcnt(ctx
, result
);
4256 result
= LLVMBuildAdd(builder
, result
, src
, "");
4260 ac_build_optimization_barrier(ctx
, &src
);
4262 LLVMValueRef identity
=
4263 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4264 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4265 LLVMTypeOf(identity
), "");
4266 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, true);
4268 return ac_build_wwm(ctx
, result
);
4272 ac_build_exclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4274 LLVMValueRef result
;
4276 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4277 LLVMBuilderRef builder
= ctx
->builder
;
4278 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4279 result
= ac_build_ballot(ctx
, src
);
4280 result
= ac_build_mbcnt(ctx
, result
);
4284 ac_build_optimization_barrier(ctx
, &src
);
4286 LLVMValueRef identity
=
4287 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4288 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4289 LLVMTypeOf(identity
), "");
4290 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, false);
4292 return ac_build_wwm(ctx
, result
);
4296 ac_build_reduce(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
, unsigned cluster_size
)
4298 if (cluster_size
== 1) return src
;
4299 ac_build_optimization_barrier(ctx
, &src
);
4300 LLVMValueRef result
, swap
;
4301 LLVMValueRef identity
= get_reduction_identity(ctx
, op
,
4302 ac_get_type_size(LLVMTypeOf(src
)));
4303 result
= LLVMBuildBitCast(ctx
->builder
,
4304 ac_build_set_inactive(ctx
, src
, identity
),
4305 LLVMTypeOf(identity
), "");
4306 swap
= ac_build_quad_swizzle(ctx
, result
, 1, 0, 3, 2);
4307 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4308 if (cluster_size
== 2) return ac_build_wwm(ctx
, result
);
4310 swap
= ac_build_quad_swizzle(ctx
, result
, 2, 3, 0, 1);
4311 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4312 if (cluster_size
== 4) return ac_build_wwm(ctx
, result
);
4314 if (ctx
->chip_class
>= GFX8
)
4315 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_half_mirror
, 0xf, 0xf, false);
4317 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x04));
4318 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4319 if (cluster_size
== 8) return ac_build_wwm(ctx
, result
);
4321 if (ctx
->chip_class
>= GFX8
)
4322 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_mirror
, 0xf, 0xf, false);
4324 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x08));
4325 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4326 if (cluster_size
== 16) return ac_build_wwm(ctx
, result
);
4328 if (ctx
->chip_class
>= GFX10
)
4329 swap
= ac_build_permlane16(ctx
, result
, 0, true, false);
4330 else if (ctx
->chip_class
>= GFX8
&& cluster_size
!= 32)
4331 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4333 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x10));
4334 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4335 if (cluster_size
== 32) return ac_build_wwm(ctx
, result
);
4337 if (ctx
->chip_class
>= GFX8
) {
4338 if (ctx
->chip_class
>= GFX10
)
4339 swap
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, false));
4341 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4342 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4343 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 63, 0));
4344 return ac_build_wwm(ctx
, result
);
4346 swap
= ac_build_readlane(ctx
, result
, ctx
->i32_0
);
4347 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 32, 0));
4348 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4349 return ac_build_wwm(ctx
, result
);
4354 * "Top half" of a scan that reduces per-wave values across an entire
4357 * The source value must be present in the highest lane of the wave, and the
4358 * highest lane must be live.
4361 ac_build_wg_wavescan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4363 if (ws
->maxwaves
<= 1)
4366 const LLVMValueRef last_lane
= LLVMConstInt(ctx
->i32
, ctx
->wave_size
- 1, false);
4367 LLVMBuilderRef builder
= ctx
->builder
;
4368 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4371 tmp
= LLVMBuildICmp(builder
, LLVMIntEQ
, tid
, last_lane
, "");
4372 ac_build_ifcc(ctx
, tmp
, 1000);
4373 LLVMBuildStore(builder
, ws
->src
, LLVMBuildGEP(builder
, ws
->scratch
, &ws
->waveidx
, 1, ""));
4374 ac_build_endif(ctx
, 1000);
4378 * "Bottom half" of a scan that reduces per-wave values across an entire
4381 * The caller must place a barrier between the top and bottom halves.
4384 ac_build_wg_wavescan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4386 const LLVMTypeRef type
= LLVMTypeOf(ws
->src
);
4387 const LLVMValueRef identity
=
4388 get_reduction_identity(ctx
, ws
->op
, ac_get_type_size(type
));
4390 if (ws
->maxwaves
<= 1) {
4391 ws
->result_reduce
= ws
->src
;
4392 ws
->result_inclusive
= ws
->src
;
4393 ws
->result_exclusive
= identity
;
4396 assert(ws
->maxwaves
<= 32);
4398 LLVMBuilderRef builder
= ctx
->builder
;
4399 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4400 LLVMBasicBlockRef bbs
[2];
4401 LLVMValueRef phivalues_scan
[2];
4402 LLVMValueRef tmp
, tmp2
;
4404 bbs
[0] = LLVMGetInsertBlock(builder
);
4405 phivalues_scan
[0] = LLVMGetUndef(type
);
4407 if (ws
->enable_reduce
)
4408 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->numwaves
, "");
4409 else if (ws
->enable_inclusive
)
4410 tmp
= LLVMBuildICmp(builder
, LLVMIntULE
, tid
, ws
->waveidx
, "");
4412 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->waveidx
, "");
4413 ac_build_ifcc(ctx
, tmp
, 1001);
4415 tmp
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, ws
->scratch
, &tid
, 1, ""), "");
4417 ac_build_optimization_barrier(ctx
, &tmp
);
4419 bbs
[1] = LLVMGetInsertBlock(builder
);
4420 phivalues_scan
[1] = ac_build_scan(ctx
, ws
->op
, tmp
, identity
, ws
->maxwaves
, true);
4422 ac_build_endif(ctx
, 1001);
4424 const LLVMValueRef scan
= ac_build_phi(ctx
, type
, 2, phivalues_scan
, bbs
);
4426 if (ws
->enable_reduce
) {
4427 tmp
= LLVMBuildSub(builder
, ws
->numwaves
, ctx
->i32_1
, "");
4428 ws
->result_reduce
= ac_build_readlane(ctx
, scan
, tmp
);
4430 if (ws
->enable_inclusive
)
4431 ws
->result_inclusive
= ac_build_readlane(ctx
, scan
, ws
->waveidx
);
4432 if (ws
->enable_exclusive
) {
4433 tmp
= LLVMBuildSub(builder
, ws
->waveidx
, ctx
->i32_1
, "");
4434 tmp
= ac_build_readlane(ctx
, scan
, tmp
);
4435 tmp2
= LLVMBuildICmp(builder
, LLVMIntEQ
, ws
->waveidx
, ctx
->i32_0
, "");
4436 ws
->result_exclusive
= LLVMBuildSelect(builder
, tmp2
, identity
, tmp
, "");
4441 * Inclusive scan of a per-wave value across an entire workgroup.
4443 * This implies an s_barrier instruction.
4445 * Unlike ac_build_inclusive_scan, the caller \em must ensure that all threads
4446 * of the workgroup are live. (This requirement cannot easily be relaxed in a
4447 * useful manner because of the barrier in the algorithm.)
4450 ac_build_wg_wavescan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4452 ac_build_wg_wavescan_top(ctx
, ws
);
4453 ac_build_s_barrier(ctx
);
4454 ac_build_wg_wavescan_bottom(ctx
, ws
);
4458 * "Top half" of a scan that reduces per-thread values across an entire
4461 * All lanes must be active when this code runs.
4464 ac_build_wg_scan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4466 if (ws
->enable_exclusive
) {
4467 ws
->extra
= ac_build_exclusive_scan(ctx
, ws
->src
, ws
->op
);
4468 if (LLVMTypeOf(ws
->src
) == ctx
->i1
&& ws
->op
== nir_op_iadd
)
4469 ws
->src
= LLVMBuildZExt(ctx
->builder
, ws
->src
, ctx
->i32
, "");
4470 ws
->src
= ac_build_alu_op(ctx
, ws
->extra
, ws
->src
, ws
->op
);
4472 ws
->src
= ac_build_inclusive_scan(ctx
, ws
->src
, ws
->op
);
4475 bool enable_inclusive
= ws
->enable_inclusive
;
4476 bool enable_exclusive
= ws
->enable_exclusive
;
4477 ws
->enable_inclusive
= false;
4478 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4479 ac_build_wg_wavescan_top(ctx
, ws
);
4480 ws
->enable_inclusive
= enable_inclusive
;
4481 ws
->enable_exclusive
= enable_exclusive
;
4485 * "Bottom half" of a scan that reduces per-thread values across an entire
4488 * The caller must place a barrier between the top and bottom halves.
4491 ac_build_wg_scan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4493 bool enable_inclusive
= ws
->enable_inclusive
;
4494 bool enable_exclusive
= ws
->enable_exclusive
;
4495 ws
->enable_inclusive
= false;
4496 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4497 ac_build_wg_wavescan_bottom(ctx
, ws
);
4498 ws
->enable_inclusive
= enable_inclusive
;
4499 ws
->enable_exclusive
= enable_exclusive
;
4501 /* ws->result_reduce is already the correct value */
4502 if (ws
->enable_inclusive
)
4503 ws
->result_inclusive
= ac_build_alu_op(ctx
, ws
->result_inclusive
, ws
->src
, ws
->op
);
4504 if (ws
->enable_exclusive
)
4505 ws
->result_exclusive
= ac_build_alu_op(ctx
, ws
->result_exclusive
, ws
->extra
, ws
->op
);
4509 * A scan that reduces per-thread values across an entire workgroup.
4511 * The caller must ensure that all lanes are active when this code runs
4512 * (WWM is insufficient!), because there is an implied barrier.
4515 ac_build_wg_scan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4517 ac_build_wg_scan_top(ctx
, ws
);
4518 ac_build_s_barrier(ctx
);
4519 ac_build_wg_scan_bottom(ctx
, ws
);
4523 ac_build_quad_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4524 unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
4526 unsigned mask
= dpp_quad_perm(lane0
, lane1
, lane2
, lane3
);
4527 if (ctx
->chip_class
>= GFX8
) {
4528 return ac_build_dpp(ctx
, src
, src
, mask
, 0xf, 0xf, false);
4530 return ac_build_ds_swizzle(ctx
, src
, (1 << 15) | mask
);
4535 ac_build_shuffle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef index
)
4537 LLVMTypeRef type
= LLVMTypeOf(src
);
4538 LLVMValueRef result
;
4540 index
= LLVMBuildMul(ctx
->builder
, index
, LLVMConstInt(ctx
->i32
, 4, 0), "");
4541 src
= LLVMBuildZExt(ctx
->builder
, src
, ctx
->i32
, "");
4543 result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.bpermute", ctx
->i32
,
4544 (LLVMValueRef
[]) {index
, src
}, 2,
4545 AC_FUNC_ATTR_READNONE
|
4546 AC_FUNC_ATTR_CONVERGENT
);
4547 return LLVMBuildTrunc(ctx
->builder
, result
, type
, "");
4551 ac_build_frexp_exp(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4557 if (bitsize
== 16) {
4558 intr
= "llvm.amdgcn.frexp.exp.i16.f16";
4560 } else if (bitsize
== 32) {
4561 intr
= "llvm.amdgcn.frexp.exp.i32.f32";
4564 intr
= "llvm.amdgcn.frexp.exp.i32.f64";
4568 LLVMValueRef params
[] = {
4571 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4572 AC_FUNC_ATTR_READNONE
);
4575 ac_build_frexp_mant(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4581 if (bitsize
== 16) {
4582 intr
= "llvm.amdgcn.frexp.mant.f16";
4584 } else if (bitsize
== 32) {
4585 intr
= "llvm.amdgcn.frexp.mant.f32";
4588 intr
= "llvm.amdgcn.frexp.mant.f64";
4592 LLVMValueRef params
[] = {
4595 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4596 AC_FUNC_ATTR_READNONE
);
4600 ac_build_canonicalize(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4606 if (bitsize
== 16) {
4607 intr
= "llvm.canonicalize.f16";
4609 } else if (bitsize
== 32) {
4610 intr
= "llvm.canonicalize.f32";
4613 intr
= "llvm.canonicalize.f64";
4617 LLVMValueRef params
[] = {
4620 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4621 AC_FUNC_ATTR_READNONE
);
4625 * this takes an I,J coordinate pair,
4626 * and works out the X and Y derivatives.
4627 * it returns DDX(I), DDX(J), DDY(I), DDY(J).
4630 ac_build_ddxy_interp(struct ac_llvm_context
*ctx
, LLVMValueRef interp_ij
)
4632 LLVMValueRef result
[4], a
;
4635 for (i
= 0; i
< 2; i
++) {
4636 a
= LLVMBuildExtractElement(ctx
->builder
, interp_ij
,
4637 LLVMConstInt(ctx
->i32
, i
, false), "");
4638 result
[i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 1, a
);
4639 result
[2+i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 2, a
);
4641 return ac_build_gather_values(ctx
, result
, 4);
4645 ac_build_load_helper_invocation(struct ac_llvm_context
*ctx
)
4647 LLVMValueRef result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ps.live",
4649 AC_FUNC_ATTR_READNONE
);
4650 result
= LLVMBuildNot(ctx
->builder
, result
, "");
4651 return LLVMBuildSExt(ctx
->builder
, result
, ctx
->i32
, "");
4654 LLVMValueRef
ac_build_call(struct ac_llvm_context
*ctx
, LLVMValueRef func
,
4655 LLVMValueRef
*args
, unsigned num_args
)
4657 LLVMValueRef ret
= LLVMBuildCall(ctx
->builder
, func
, args
, num_args
, "");
4658 LLVMSetInstructionCallConv(ret
, LLVMGetFunctionCallConv(func
));
4663 ac_export_mrt_z(struct ac_llvm_context
*ctx
, LLVMValueRef depth
,
4664 LLVMValueRef stencil
, LLVMValueRef samplemask
,
4665 struct ac_export_args
*args
)
4668 unsigned format
= ac_get_spi_shader_z_format(depth
!= NULL
,
4670 samplemask
!= NULL
);
4672 assert(depth
|| stencil
|| samplemask
);
4674 memset(args
, 0, sizeof(*args
));
4676 args
->valid_mask
= 1; /* whether the EXEC mask is valid */
4677 args
->done
= 1; /* DONE bit */
4679 /* Specify the target we are exporting */
4680 args
->target
= V_008DFC_SQ_EXP_MRTZ
;
4682 args
->compr
= 0; /* COMP flag */
4683 args
->out
[0] = LLVMGetUndef(ctx
->f32
); /* R, depth */
4684 args
->out
[1] = LLVMGetUndef(ctx
->f32
); /* G, stencil test val[0:7], stencil op val[8:15] */
4685 args
->out
[2] = LLVMGetUndef(ctx
->f32
); /* B, sample mask */
4686 args
->out
[3] = LLVMGetUndef(ctx
->f32
); /* A, alpha to mask */
4688 if (format
== V_028710_SPI_SHADER_UINT16_ABGR
) {
4690 args
->compr
= 1; /* COMPR flag */
4693 /* Stencil should be in X[23:16]. */
4694 stencil
= ac_to_integer(ctx
, stencil
);
4695 stencil
= LLVMBuildShl(ctx
->builder
, stencil
,
4696 LLVMConstInt(ctx
->i32
, 16, 0), "");
4697 args
->out
[0] = ac_to_float(ctx
, stencil
);
4701 /* SampleMask should be in Y[15:0]. */
4702 args
->out
[1] = samplemask
;
4707 args
->out
[0] = depth
;
4711 args
->out
[1] = stencil
;
4715 args
->out
[2] = samplemask
;
4720 /* GFX6 (except OLAND and HAINAN) has a bug that it only looks
4721 * at the X writemask component. */
4722 if (ctx
->chip_class
== GFX6
&&
4723 ctx
->family
!= CHIP_OLAND
&&
4724 ctx
->family
!= CHIP_HAINAN
)
4727 /* Specify which components to enable */
4728 args
->enabled_channels
= mask
;
4731 /* Send GS Alloc Req message from the first wave of the group to SPI.
4732 * Message payload is:
4733 * - bits 0..10: vertices in group
4734 * - bits 12..22: primitives in group
4736 void ac_build_sendmsg_gs_alloc_req(struct ac_llvm_context
*ctx
, LLVMValueRef wave_id
,
4737 LLVMValueRef vtx_cnt
, LLVMValueRef prim_cnt
)
4739 LLVMBuilderRef builder
= ctx
->builder
;
4742 ac_build_ifcc(ctx
, LLVMBuildICmp(builder
, LLVMIntEQ
, wave_id
, ctx
->i32_0
, ""), 5020);
4744 tmp
= LLVMBuildShl(builder
, prim_cnt
, LLVMConstInt(ctx
->i32
, 12, false),"");
4745 tmp
= LLVMBuildOr(builder
, tmp
, vtx_cnt
, "");
4746 ac_build_sendmsg(ctx
, AC_SENDMSG_GS_ALLOC_REQ
, tmp
);
4748 ac_build_endif(ctx
, 5020);
4751 LLVMValueRef
ac_pack_prim_export(struct ac_llvm_context
*ctx
,
4752 const struct ac_ngg_prim
*prim
)
4754 /* The prim export format is:
4755 * - bits 0..8: index 0
4756 * - bit 9: edge flag 0
4757 * - bits 10..18: index 1
4758 * - bit 19: edge flag 1
4759 * - bits 20..28: index 2
4760 * - bit 29: edge flag 2
4761 * - bit 31: null primitive (skip)
4763 LLVMBuilderRef builder
= ctx
->builder
;
4764 LLVMValueRef tmp
= LLVMBuildZExt(builder
, prim
->isnull
, ctx
->i32
, "");
4765 LLVMValueRef result
= LLVMBuildShl(builder
, tmp
, LLVMConstInt(ctx
->i32
, 31, false), "");
4767 for (unsigned i
= 0; i
< prim
->num_vertices
; ++i
) {
4768 tmp
= LLVMBuildShl(builder
, prim
->index
[i
],
4769 LLVMConstInt(ctx
->i32
, 10 * i
, false), "");
4770 result
= LLVMBuildOr(builder
, result
, tmp
, "");
4771 tmp
= LLVMBuildZExt(builder
, prim
->edgeflag
[i
], ctx
->i32
, "");
4772 tmp
= LLVMBuildShl(builder
, tmp
,
4773 LLVMConstInt(ctx
->i32
, 10 * i
+ 9, false), "");
4774 result
= LLVMBuildOr(builder
, result
, tmp
, "");
4779 void ac_build_export_prim(struct ac_llvm_context
*ctx
,
4780 const struct ac_ngg_prim
*prim
)
4782 struct ac_export_args args
;
4784 if (prim
->passthrough
) {
4785 args
.out
[0] = prim
->passthrough
;
4787 args
.out
[0] = ac_pack_prim_export(ctx
, prim
);
4790 args
.out
[0] = LLVMBuildBitCast(ctx
->builder
, args
.out
[0], ctx
->f32
, "");
4791 args
.out
[1] = LLVMGetUndef(ctx
->f32
);
4792 args
.out
[2] = LLVMGetUndef(ctx
->f32
);
4793 args
.out
[3] = LLVMGetUndef(ctx
->f32
);
4795 args
.target
= V_008DFC_SQ_EXP_PRIM
;
4796 args
.enabled_channels
= 1;
4798 args
.valid_mask
= false;
4801 ac_build_export(ctx
, &args
);
4805 arg_llvm_type(enum ac_arg_type type
, unsigned size
, struct ac_llvm_context
*ctx
)
4807 if (type
== AC_ARG_FLOAT
) {
4808 return size
== 1 ? ctx
->f32
: LLVMVectorType(ctx
->f32
, size
);
4809 } else if (type
== AC_ARG_INT
) {
4810 return size
== 1 ? ctx
->i32
: LLVMVectorType(ctx
->i32
, size
);
4812 LLVMTypeRef ptr_type
;
4814 case AC_ARG_CONST_PTR
:
4817 case AC_ARG_CONST_FLOAT_PTR
:
4818 ptr_type
= ctx
->f32
;
4820 case AC_ARG_CONST_PTR_PTR
:
4821 ptr_type
= ac_array_in_const32_addr_space(ctx
->i8
);
4823 case AC_ARG_CONST_DESC_PTR
:
4824 ptr_type
= ctx
->v4i32
;
4826 case AC_ARG_CONST_IMAGE_PTR
:
4827 ptr_type
= ctx
->v8i32
;
4830 unreachable("unknown arg type");
4833 return ac_array_in_const32_addr_space(ptr_type
);
4836 return ac_array_in_const_addr_space(ptr_type
);
4842 ac_build_main(const struct ac_shader_args
*args
,
4843 struct ac_llvm_context
*ctx
,
4844 enum ac_llvm_calling_convention convention
,
4845 const char *name
, LLVMTypeRef ret_type
,
4846 LLVMModuleRef module
)
4848 LLVMTypeRef arg_types
[AC_MAX_ARGS
];
4850 for (unsigned i
= 0; i
< args
->arg_count
; i
++) {
4851 arg_types
[i
] = arg_llvm_type(args
->args
[i
].type
,
4852 args
->args
[i
].size
, ctx
);
4855 LLVMTypeRef main_function_type
=
4856 LLVMFunctionType(ret_type
, arg_types
, args
->arg_count
, 0);
4858 LLVMValueRef main_function
=
4859 LLVMAddFunction(module
, name
, main_function_type
);
4860 LLVMBasicBlockRef main_function_body
=
4861 LLVMAppendBasicBlockInContext(ctx
->context
, main_function
, "main_body");
4862 LLVMPositionBuilderAtEnd(ctx
->builder
, main_function_body
);
4864 LLVMSetFunctionCallConv(main_function
, convention
);
4865 for (unsigned i
= 0; i
< args
->arg_count
; ++i
) {
4866 LLVMValueRef P
= LLVMGetParam(main_function
, i
);
4868 if (args
->args
[i
].file
!= AC_ARG_SGPR
)
4871 ac_add_function_attr(ctx
->context
, main_function
, i
+ 1, AC_FUNC_ATTR_INREG
);
4873 if (LLVMGetTypeKind(LLVMTypeOf(P
)) == LLVMPointerTypeKind
) {
4874 ac_add_function_attr(ctx
->context
, main_function
, i
+ 1, AC_FUNC_ATTR_NOALIAS
);
4875 ac_add_attr_dereferenceable(P
, UINT64_MAX
);
4879 ctx
->main_function
= main_function
;
4880 return main_function
;