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>
30 #include "c11/threads.h"
35 #include "ac_llvm_util.h"
36 #include "ac_exp_param.h"
37 #include "util/bitscan.h"
38 #include "util/macros.h"
39 #include "util/u_atomic.h"
40 #include "util/u_math.h"
43 #include "shader_enums.h"
45 #define AC_LLVM_INITIAL_CF_DEPTH 4
47 /* Data for if/else/endif and bgnloop/endloop control flow structures.
50 /* Loop exit or next part of if/else/endif. */
51 LLVMBasicBlockRef next_block
;
52 LLVMBasicBlockRef loop_entry_block
;
55 /* Initialize module-independent parts of the context.
57 * The caller is responsible for initializing ctx::module and ctx::builder.
60 ac_llvm_context_init(struct ac_llvm_context
*ctx
,
61 struct ac_llvm_compiler
*compiler
,
62 enum chip_class chip_class
, enum radeon_family family
,
67 ctx
->context
= LLVMContextCreate();
69 ctx
->chip_class
= chip_class
;
71 ctx
->wave_size
= wave_size
;
72 ctx
->module
= ac_create_module(wave_size
== 32 ? compiler
->tm_wave32
77 ctx
->voidt
= LLVMVoidTypeInContext(ctx
->context
);
78 ctx
->i1
= LLVMInt1TypeInContext(ctx
->context
);
79 ctx
->i8
= LLVMInt8TypeInContext(ctx
->context
);
80 ctx
->i16
= LLVMIntTypeInContext(ctx
->context
, 16);
81 ctx
->i32
= LLVMIntTypeInContext(ctx
->context
, 32);
82 ctx
->i64
= LLVMIntTypeInContext(ctx
->context
, 64);
83 ctx
->intptr
= ctx
->i32
;
84 ctx
->f16
= LLVMHalfTypeInContext(ctx
->context
);
85 ctx
->f32
= LLVMFloatTypeInContext(ctx
->context
);
86 ctx
->f64
= LLVMDoubleTypeInContext(ctx
->context
);
87 ctx
->v2i16
= LLVMVectorType(ctx
->i16
, 2);
88 ctx
->v2i32
= LLVMVectorType(ctx
->i32
, 2);
89 ctx
->v3i32
= LLVMVectorType(ctx
->i32
, 3);
90 ctx
->v4i32
= LLVMVectorType(ctx
->i32
, 4);
91 ctx
->v2f32
= LLVMVectorType(ctx
->f32
, 2);
92 ctx
->v3f32
= LLVMVectorType(ctx
->f32
, 3);
93 ctx
->v4f32
= LLVMVectorType(ctx
->f32
, 4);
94 ctx
->v8i32
= LLVMVectorType(ctx
->i32
, 8);
96 ctx
->i8_0
= LLVMConstInt(ctx
->i8
, 0, false);
97 ctx
->i8_1
= LLVMConstInt(ctx
->i8
, 1, false);
98 ctx
->i16_0
= LLVMConstInt(ctx
->i16
, 0, false);
99 ctx
->i16_1
= LLVMConstInt(ctx
->i16
, 1, false);
100 ctx
->i32_0
= LLVMConstInt(ctx
->i32
, 0, false);
101 ctx
->i32_1
= LLVMConstInt(ctx
->i32
, 1, false);
102 ctx
->i64_0
= LLVMConstInt(ctx
->i64
, 0, false);
103 ctx
->i64_1
= LLVMConstInt(ctx
->i64
, 1, false);
104 ctx
->f16_0
= LLVMConstReal(ctx
->f16
, 0.0);
105 ctx
->f16_1
= LLVMConstReal(ctx
->f16
, 1.0);
106 ctx
->f32_0
= LLVMConstReal(ctx
->f32
, 0.0);
107 ctx
->f32_1
= LLVMConstReal(ctx
->f32
, 1.0);
108 ctx
->f64_0
= LLVMConstReal(ctx
->f64
, 0.0);
109 ctx
->f64_1
= LLVMConstReal(ctx
->f64
, 1.0);
111 ctx
->i1false
= LLVMConstInt(ctx
->i1
, 0, false);
112 ctx
->i1true
= LLVMConstInt(ctx
->i1
, 1, false);
114 ctx
->range_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
117 ctx
->invariant_load_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
118 "invariant.load", 14);
120 ctx
->fpmath_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
, "fpmath", 6);
122 args
[0] = LLVMConstReal(ctx
->f32
, 2.5);
123 ctx
->fpmath_md_2p5_ulp
= LLVMMDNodeInContext(ctx
->context
, args
, 1);
125 ctx
->uniform_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
126 "amdgpu.uniform", 14);
128 ctx
->empty_md
= LLVMMDNodeInContext(ctx
->context
, NULL
, 0);
132 ac_llvm_context_dispose(struct ac_llvm_context
*ctx
)
136 ctx
->flow_depth_max
= 0;
140 ac_get_llvm_num_components(LLVMValueRef value
)
142 LLVMTypeRef type
= LLVMTypeOf(value
);
143 unsigned num_components
= LLVMGetTypeKind(type
) == LLVMVectorTypeKind
144 ? LLVMGetVectorSize(type
)
146 return num_components
;
150 ac_llvm_extract_elem(struct ac_llvm_context
*ac
,
154 if (LLVMGetTypeKind(LLVMTypeOf(value
)) != LLVMVectorTypeKind
) {
159 return LLVMBuildExtractElement(ac
->builder
, value
,
160 LLVMConstInt(ac
->i32
, index
, false), "");
164 ac_get_elem_bits(struct ac_llvm_context
*ctx
, LLVMTypeRef type
)
166 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
)
167 type
= LLVMGetElementType(type
);
169 if (LLVMGetTypeKind(type
) == LLVMIntegerTypeKind
)
170 return LLVMGetIntTypeWidth(type
);
172 if (type
== ctx
->f16
)
174 if (type
== ctx
->f32
)
176 if (type
== ctx
->f64
)
179 unreachable("Unhandled type kind in get_elem_bits");
183 ac_get_type_size(LLVMTypeRef type
)
185 LLVMTypeKind kind
= LLVMGetTypeKind(type
);
188 case LLVMIntegerTypeKind
:
189 return LLVMGetIntTypeWidth(type
) / 8;
190 case LLVMHalfTypeKind
:
192 case LLVMFloatTypeKind
:
194 case LLVMDoubleTypeKind
:
196 case LLVMPointerTypeKind
:
197 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_CONST_32BIT
)
200 case LLVMVectorTypeKind
:
201 return LLVMGetVectorSize(type
) *
202 ac_get_type_size(LLVMGetElementType(type
));
203 case LLVMArrayTypeKind
:
204 return LLVMGetArrayLength(type
) *
205 ac_get_type_size(LLVMGetElementType(type
));
212 static LLVMTypeRef
to_integer_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
216 else if (t
== ctx
->f16
|| t
== ctx
->i16
)
218 else if (t
== ctx
->f32
|| t
== ctx
->i32
)
220 else if (t
== ctx
->f64
|| t
== ctx
->i64
)
223 unreachable("Unhandled integer size");
227 ac_to_integer_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
229 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
230 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
231 return LLVMVectorType(to_integer_type_scalar(ctx
, elem_type
),
232 LLVMGetVectorSize(t
));
234 if (LLVMGetTypeKind(t
) == LLVMPointerTypeKind
) {
235 switch (LLVMGetPointerAddressSpace(t
)) {
236 case AC_ADDR_SPACE_GLOBAL
:
238 case AC_ADDR_SPACE_LDS
:
241 unreachable("unhandled address space");
244 return to_integer_type_scalar(ctx
, t
);
248 ac_to_integer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
250 LLVMTypeRef type
= LLVMTypeOf(v
);
251 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
252 return LLVMBuildPtrToInt(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
254 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
258 ac_to_integer_or_pointer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
260 LLVMTypeRef type
= LLVMTypeOf(v
);
261 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
)
263 return ac_to_integer(ctx
, v
);
266 static LLVMTypeRef
to_float_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
270 else if (t
== ctx
->i16
|| t
== ctx
->f16
)
272 else if (t
== ctx
->i32
|| t
== ctx
->f32
)
274 else if (t
== ctx
->i64
|| t
== ctx
->f64
)
277 unreachable("Unhandled float size");
281 ac_to_float_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
283 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
284 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
285 return LLVMVectorType(to_float_type_scalar(ctx
, elem_type
),
286 LLVMGetVectorSize(t
));
288 return to_float_type_scalar(ctx
, t
);
292 ac_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
294 LLVMTypeRef type
= LLVMTypeOf(v
);
295 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_float_type(ctx
, type
), "");
300 ac_build_intrinsic(struct ac_llvm_context
*ctx
, const char *name
,
301 LLVMTypeRef return_type
, LLVMValueRef
*params
,
302 unsigned param_count
, unsigned attrib_mask
)
304 LLVMValueRef function
, call
;
305 bool set_callsite_attrs
= !(attrib_mask
& AC_FUNC_ATTR_LEGACY
);
307 function
= LLVMGetNamedFunction(ctx
->module
, name
);
309 LLVMTypeRef param_types
[32], function_type
;
312 assert(param_count
<= 32);
314 for (i
= 0; i
< param_count
; ++i
) {
316 param_types
[i
] = LLVMTypeOf(params
[i
]);
319 LLVMFunctionType(return_type
, param_types
, param_count
, 0);
320 function
= LLVMAddFunction(ctx
->module
, name
, function_type
);
322 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
323 LLVMSetLinkage(function
, LLVMExternalLinkage
);
325 if (!set_callsite_attrs
)
326 ac_add_func_attributes(ctx
->context
, function
, attrib_mask
);
329 call
= LLVMBuildCall(ctx
->builder
, function
, params
, param_count
, "");
330 if (set_callsite_attrs
)
331 ac_add_func_attributes(ctx
->context
, call
, attrib_mask
);
336 * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
339 void ac_build_type_name_for_intr(LLVMTypeRef type
, char *buf
, unsigned bufsize
)
341 LLVMTypeRef elem_type
= type
;
343 assert(bufsize
>= 8);
345 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
) {
346 int ret
= snprintf(buf
, bufsize
, "v%u",
347 LLVMGetVectorSize(type
));
349 char *type_name
= LLVMPrintTypeToString(type
);
350 fprintf(stderr
, "Error building type name for: %s\n",
354 elem_type
= LLVMGetElementType(type
);
358 switch (LLVMGetTypeKind(elem_type
)) {
360 case LLVMIntegerTypeKind
:
361 snprintf(buf
, bufsize
, "i%d", LLVMGetIntTypeWidth(elem_type
));
363 case LLVMHalfTypeKind
:
364 snprintf(buf
, bufsize
, "f16");
366 case LLVMFloatTypeKind
:
367 snprintf(buf
, bufsize
, "f32");
369 case LLVMDoubleTypeKind
:
370 snprintf(buf
, bufsize
, "f64");
376 * Helper function that builds an LLVM IR PHI node and immediately adds
380 ac_build_phi(struct ac_llvm_context
*ctx
, LLVMTypeRef type
,
381 unsigned count_incoming
, LLVMValueRef
*values
,
382 LLVMBasicBlockRef
*blocks
)
384 LLVMValueRef phi
= LLVMBuildPhi(ctx
->builder
, type
, "");
385 LLVMAddIncoming(phi
, values
, blocks
, count_incoming
);
389 void ac_build_s_barrier(struct ac_llvm_context
*ctx
)
391 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.barrier", ctx
->voidt
, NULL
,
392 0, AC_FUNC_ATTR_CONVERGENT
);
395 /* Prevent optimizations (at least of memory accesses) across the current
396 * point in the program by emitting empty inline assembly that is marked as
397 * having side effects.
399 * Optionally, a value can be passed through the inline assembly to prevent
400 * LLVM from hoisting calls to ReadNone functions.
403 ac_build_optimization_barrier(struct ac_llvm_context
*ctx
,
406 static int counter
= 0;
408 LLVMBuilderRef builder
= ctx
->builder
;
411 snprintf(code
, sizeof(code
), "; %d", p_atomic_inc_return(&counter
));
414 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->voidt
, NULL
, 0, false);
415 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "", true, false);
416 LLVMBuildCall(builder
, inlineasm
, NULL
, 0, "");
418 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->i32
, &ctx
->i32
, 1, false);
419 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "=v,0", true, false);
420 LLVMValueRef vgpr
= *pvgpr
;
421 LLVMTypeRef vgpr_type
= LLVMTypeOf(vgpr
);
422 unsigned vgpr_size
= ac_get_type_size(vgpr_type
);
425 assert(vgpr_size
% 4 == 0);
427 vgpr
= LLVMBuildBitCast(builder
, vgpr
, LLVMVectorType(ctx
->i32
, vgpr_size
/ 4), "");
428 vgpr0
= LLVMBuildExtractElement(builder
, vgpr
, ctx
->i32_0
, "");
429 vgpr0
= LLVMBuildCall(builder
, inlineasm
, &vgpr0
, 1, "");
430 vgpr
= LLVMBuildInsertElement(builder
, vgpr
, vgpr0
, ctx
->i32_0
, "");
431 vgpr
= LLVMBuildBitCast(builder
, vgpr
, vgpr_type
, "");
438 ac_build_shader_clock(struct ac_llvm_context
*ctx
)
440 const char *intr
= HAVE_LLVM
>= 0x0900 && ctx
->chip_class
>= GFX8
?
441 "llvm.amdgcn.s.memrealtime" : "llvm.readcyclecounter";
442 LLVMValueRef tmp
= ac_build_intrinsic(ctx
, intr
, ctx
->i64
, NULL
, 0, 0);
443 return LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->v2i32
, "");
447 ac_build_ballot(struct ac_llvm_context
*ctx
,
450 const char *name
= HAVE_LLVM
>= 0x900 ? "llvm.amdgcn.icmp.i64.i32" : "llvm.amdgcn.icmp.i32";
451 LLVMValueRef args
[3] = {
454 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0)
457 /* We currently have no other way to prevent LLVM from lifting the icmp
458 * calls to a dominating basic block.
460 ac_build_optimization_barrier(ctx
, &args
[0]);
462 args
[0] = ac_to_integer(ctx
, args
[0]);
464 return ac_build_intrinsic(ctx
, name
,
466 AC_FUNC_ATTR_NOUNWIND
|
467 AC_FUNC_ATTR_READNONE
|
468 AC_FUNC_ATTR_CONVERGENT
);
471 LLVMValueRef
ac_get_i1_sgpr_mask(struct ac_llvm_context
*ctx
,
474 const char *name
= HAVE_LLVM
>= 0x900 ? "llvm.amdgcn.icmp.i64.i1" : "llvm.amdgcn.icmp.i1";
475 LLVMValueRef args
[3] = {
478 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0),
481 assert(HAVE_LLVM
>= 0x0800);
482 return ac_build_intrinsic(ctx
, name
, ctx
->i64
, args
, 3,
483 AC_FUNC_ATTR_NOUNWIND
|
484 AC_FUNC_ATTR_READNONE
|
485 AC_FUNC_ATTR_CONVERGENT
);
489 ac_build_vote_all(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
491 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
492 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
493 return LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, vote_set
, active_set
, "");
497 ac_build_vote_any(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
499 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
500 return LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, vote_set
,
501 LLVMConstInt(ctx
->i64
, 0, 0), "");
505 ac_build_vote_eq(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
507 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
508 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
510 LLVMValueRef all
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
511 vote_set
, active_set
, "");
512 LLVMValueRef none
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
514 LLVMConstInt(ctx
->i64
, 0, 0), "");
515 return LLVMBuildOr(ctx
->builder
, all
, none
, "");
519 ac_build_varying_gather_values(struct ac_llvm_context
*ctx
, LLVMValueRef
*values
,
520 unsigned value_count
, unsigned component
)
522 LLVMValueRef vec
= NULL
;
524 if (value_count
== 1) {
525 return values
[component
];
526 } else if (!value_count
)
527 unreachable("value_count is 0");
529 for (unsigned i
= component
; i
< value_count
+ component
; i
++) {
530 LLVMValueRef value
= values
[i
];
533 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
534 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
- component
, false);
535 vec
= LLVMBuildInsertElement(ctx
->builder
, vec
, value
, index
, "");
541 ac_build_gather_values_extended(struct ac_llvm_context
*ctx
,
542 LLVMValueRef
*values
,
543 unsigned value_count
,
544 unsigned value_stride
,
548 LLVMBuilderRef builder
= ctx
->builder
;
549 LLVMValueRef vec
= NULL
;
552 if (value_count
== 1 && !always_vector
) {
554 return LLVMBuildLoad(builder
, values
[0], "");
556 } else if (!value_count
)
557 unreachable("value_count is 0");
559 for (i
= 0; i
< value_count
; i
++) {
560 LLVMValueRef value
= values
[i
* value_stride
];
562 value
= LLVMBuildLoad(builder
, value
, "");
565 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
566 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
, false);
567 vec
= LLVMBuildInsertElement(builder
, vec
, value
, index
, "");
573 ac_build_gather_values(struct ac_llvm_context
*ctx
,
574 LLVMValueRef
*values
,
575 unsigned value_count
)
577 return ac_build_gather_values_extended(ctx
, values
, value_count
, 1, false, false);
580 /* Expand a scalar or vector to <dst_channels x type> by filling the remaining
581 * channels with undef. Extract at most src_channels components from the input.
584 ac_build_expand(struct ac_llvm_context
*ctx
,
586 unsigned src_channels
,
587 unsigned dst_channels
)
589 LLVMTypeRef elemtype
;
590 LLVMValueRef chan
[dst_channels
];
592 if (LLVMGetTypeKind(LLVMTypeOf(value
)) == LLVMVectorTypeKind
) {
593 unsigned vec_size
= LLVMGetVectorSize(LLVMTypeOf(value
));
595 if (src_channels
== dst_channels
&& vec_size
== dst_channels
)
598 src_channels
= MIN2(src_channels
, vec_size
);
600 for (unsigned i
= 0; i
< src_channels
; i
++)
601 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
);
603 elemtype
= LLVMGetElementType(LLVMTypeOf(value
));
606 assert(src_channels
== 1);
609 elemtype
= LLVMTypeOf(value
);
612 for (unsigned i
= src_channels
; i
< dst_channels
; i
++)
613 chan
[i
] = LLVMGetUndef(elemtype
);
615 return ac_build_gather_values(ctx
, chan
, dst_channels
);
618 /* Expand a scalar or vector to <4 x type> by filling the remaining channels
619 * with undef. Extract at most num_channels components from the input.
621 LLVMValueRef
ac_build_expand_to_vec4(struct ac_llvm_context
*ctx
,
623 unsigned num_channels
)
625 return ac_build_expand(ctx
, value
, num_channels
, 4);
628 LLVMValueRef
ac_build_round(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
630 unsigned type_size
= ac_get_type_size(LLVMTypeOf(value
));
634 name
= "llvm.rint.f16";
635 else if (type_size
== 4)
636 name
= "llvm.rint.f32";
638 name
= "llvm.rint.f64";
640 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(value
), &value
, 1,
641 AC_FUNC_ATTR_READNONE
);
645 ac_build_fdiv(struct ac_llvm_context
*ctx
,
649 /* If we do (num / den), LLVM >= 7.0 does:
650 * return num * v_rcp_f32(den * (fabs(den) > 0x1.0p+96f ? 0x1.0p-32f : 1.0f));
652 * If we do (num * (1 / den)), LLVM does:
653 * return num * v_rcp_f32(den);
655 LLVMValueRef one
= LLVMConstReal(LLVMTypeOf(num
), 1.0);
656 LLVMValueRef rcp
= LLVMBuildFDiv(ctx
->builder
, one
, den
, "");
657 LLVMValueRef ret
= LLVMBuildFMul(ctx
->builder
, num
, rcp
, "");
659 /* Use v_rcp_f32 instead of precise division. */
660 if (!LLVMIsConstant(ret
))
661 LLVMSetMetadata(ret
, ctx
->fpmath_md_kind
, ctx
->fpmath_md_2p5_ulp
);
665 /* See fast_idiv_by_const.h. */
666 /* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */
667 LLVMValueRef
ac_build_fast_udiv(struct ac_llvm_context
*ctx
,
669 LLVMValueRef multiplier
,
670 LLVMValueRef pre_shift
,
671 LLVMValueRef post_shift
,
672 LLVMValueRef increment
)
674 LLVMBuilderRef builder
= ctx
->builder
;
676 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
677 num
= LLVMBuildMul(builder
,
678 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
679 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
680 num
= LLVMBuildAdd(builder
, num
,
681 LLVMBuildZExt(builder
, increment
, ctx
->i64
, ""), "");
682 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
683 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
684 return LLVMBuildLShr(builder
, num
, post_shift
, "");
687 /* See fast_idiv_by_const.h. */
688 /* If num != UINT_MAX, this more efficient version can be used. */
689 /* Set: increment = util_fast_udiv_info::increment; */
690 LLVMValueRef
ac_build_fast_udiv_nuw(struct ac_llvm_context
*ctx
,
692 LLVMValueRef multiplier
,
693 LLVMValueRef pre_shift
,
694 LLVMValueRef post_shift
,
695 LLVMValueRef increment
)
697 LLVMBuilderRef builder
= ctx
->builder
;
699 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
700 num
= LLVMBuildNUWAdd(builder
, num
, increment
, "");
701 num
= LLVMBuildMul(builder
,
702 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
703 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
704 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
705 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
706 return LLVMBuildLShr(builder
, num
, post_shift
, "");
709 /* See fast_idiv_by_const.h. */
710 /* Both operands must fit in 31 bits and the divisor must not be 1. */
711 LLVMValueRef
ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context
*ctx
,
713 LLVMValueRef multiplier
,
714 LLVMValueRef post_shift
)
716 LLVMBuilderRef builder
= ctx
->builder
;
718 num
= LLVMBuildMul(builder
,
719 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
720 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
721 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
722 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
723 return LLVMBuildLShr(builder
, num
, post_shift
, "");
726 /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
727 * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
728 * already multiplied by two. id is the cube face number.
730 struct cube_selection_coords
{
737 build_cube_intrinsic(struct ac_llvm_context
*ctx
,
739 struct cube_selection_coords
*out
)
741 LLVMTypeRef f32
= ctx
->f32
;
743 out
->stc
[1] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubetc",
744 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
745 out
->stc
[0] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubesc",
746 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
747 out
->ma
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubema",
748 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
749 out
->id
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubeid",
750 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
754 * Build a manual selection sequence for cube face sc/tc coordinates and
755 * major axis vector (multiplied by 2 for consistency) for the given
756 * vec3 \p coords, for the face implied by \p selcoords.
758 * For the major axis, we always adjust the sign to be in the direction of
759 * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
760 * the selcoords major axis.
762 static void build_cube_select(struct ac_llvm_context
*ctx
,
763 const struct cube_selection_coords
*selcoords
,
764 const LLVMValueRef
*coords
,
765 LLVMValueRef
*out_st
,
766 LLVMValueRef
*out_ma
)
768 LLVMBuilderRef builder
= ctx
->builder
;
769 LLVMTypeRef f32
= LLVMTypeOf(coords
[0]);
770 LLVMValueRef is_ma_positive
;
772 LLVMValueRef is_ma_z
, is_not_ma_z
;
773 LLVMValueRef is_ma_y
;
774 LLVMValueRef is_ma_x
;
778 is_ma_positive
= LLVMBuildFCmp(builder
, LLVMRealUGE
,
779 selcoords
->ma
, LLVMConstReal(f32
, 0.0), "");
780 sgn_ma
= LLVMBuildSelect(builder
, is_ma_positive
,
781 LLVMConstReal(f32
, 1.0), LLVMConstReal(f32
, -1.0), "");
783 is_ma_z
= LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 4.0), "");
784 is_not_ma_z
= LLVMBuildNot(builder
, is_ma_z
, "");
785 is_ma_y
= LLVMBuildAnd(builder
, is_not_ma_z
,
786 LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 2.0), ""), "");
787 is_ma_x
= LLVMBuildAnd(builder
, is_not_ma_z
, LLVMBuildNot(builder
, is_ma_y
, ""), "");
790 tmp
= LLVMBuildSelect(builder
, is_ma_x
, coords
[2], coords
[0], "");
791 sgn
= LLVMBuildSelect(builder
, is_ma_y
, LLVMConstReal(f32
, 1.0),
792 LLVMBuildSelect(builder
, is_ma_z
, sgn_ma
,
793 LLVMBuildFNeg(builder
, sgn_ma
, ""), ""), "");
794 out_st
[0] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
797 tmp
= LLVMBuildSelect(builder
, is_ma_y
, coords
[2], coords
[1], "");
798 sgn
= LLVMBuildSelect(builder
, is_ma_y
, sgn_ma
,
799 LLVMConstReal(f32
, -1.0), "");
800 out_st
[1] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
803 tmp
= LLVMBuildSelect(builder
, is_ma_z
, coords
[2],
804 LLVMBuildSelect(builder
, is_ma_y
, coords
[1], coords
[0], ""), "");
805 tmp
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
806 ctx
->f32
, &tmp
, 1, AC_FUNC_ATTR_READNONE
);
807 *out_ma
= LLVMBuildFMul(builder
, tmp
, LLVMConstReal(f32
, 2.0), "");
811 ac_prepare_cube_coords(struct ac_llvm_context
*ctx
,
812 bool is_deriv
, bool is_array
, bool is_lod
,
813 LLVMValueRef
*coords_arg
,
814 LLVMValueRef
*derivs_arg
)
817 LLVMBuilderRef builder
= ctx
->builder
;
818 struct cube_selection_coords selcoords
;
819 LLVMValueRef coords
[3];
822 if (is_array
&& !is_lod
) {
823 LLVMValueRef tmp
= ac_build_round(ctx
, coords_arg
[3]);
825 /* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says:
827 * "For Array forms, the array layer used will be
829 * max(0, min(d−1, floor(layer+0.5)))
831 * where d is the depth of the texture array and layer
832 * comes from the component indicated in the tables below.
833 * Workaroudn for an issue where the layer is taken from a
834 * helper invocation which happens to fall on a different
835 * layer due to extrapolation."
837 * GFX8 and earlier attempt to implement this in hardware by
838 * clamping the value of coords[2] = (8 * layer) + face.
839 * Unfortunately, this means that the we end up with the wrong
840 * face when clamping occurs.
842 * Clamp the layer earlier to work around the issue.
844 if (ctx
->chip_class
<= GFX8
) {
846 ge0
= LLVMBuildFCmp(builder
, LLVMRealOGE
, tmp
, ctx
->f32_0
, "");
847 tmp
= LLVMBuildSelect(builder
, ge0
, tmp
, ctx
->f32_0
, "");
853 build_cube_intrinsic(ctx
, coords_arg
, &selcoords
);
855 invma
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
856 ctx
->f32
, &selcoords
.ma
, 1, AC_FUNC_ATTR_READNONE
);
857 invma
= ac_build_fdiv(ctx
, LLVMConstReal(ctx
->f32
, 1.0), invma
);
859 for (int i
= 0; i
< 2; ++i
)
860 coords
[i
] = LLVMBuildFMul(builder
, selcoords
.stc
[i
], invma
, "");
862 coords
[2] = selcoords
.id
;
864 if (is_deriv
&& derivs_arg
) {
865 LLVMValueRef derivs
[4];
868 /* Convert cube derivatives to 2D derivatives. */
869 for (axis
= 0; axis
< 2; axis
++) {
870 LLVMValueRef deriv_st
[2];
871 LLVMValueRef deriv_ma
;
873 /* Transform the derivative alongside the texture
874 * coordinate. Mathematically, the correct formula is
875 * as follows. Assume we're projecting onto the +Z face
876 * and denote by dx/dh the derivative of the (original)
877 * X texture coordinate with respect to horizontal
878 * window coordinates. The projection onto the +Z face
883 * Then df/dh = df/dx * dx/dh + df/dz * dz/dh
884 * = 1/z * dx/dh - x/z * 1/z * dz/dh.
886 * This motivatives the implementation below.
888 * Whether this actually gives the expected results for
889 * apps that might feed in derivatives obtained via
890 * finite differences is anyone's guess. The OpenGL spec
891 * seems awfully quiet about how textureGrad for cube
892 * maps should be handled.
894 build_cube_select(ctx
, &selcoords
, &derivs_arg
[axis
* 3],
895 deriv_st
, &deriv_ma
);
897 deriv_ma
= LLVMBuildFMul(builder
, deriv_ma
, invma
, "");
899 for (int i
= 0; i
< 2; ++i
)
900 derivs
[axis
* 2 + i
] =
901 LLVMBuildFSub(builder
,
902 LLVMBuildFMul(builder
, deriv_st
[i
], invma
, ""),
903 LLVMBuildFMul(builder
, deriv_ma
, coords
[i
], ""), "");
906 memcpy(derivs_arg
, derivs
, sizeof(derivs
));
909 /* Shift the texture coordinate. This must be applied after the
910 * derivative calculation.
912 for (int i
= 0; i
< 2; ++i
)
913 coords
[i
] = LLVMBuildFAdd(builder
, coords
[i
], LLVMConstReal(ctx
->f32
, 1.5), "");
916 /* for cube arrays coord.z = coord.w(array_index) * 8 + face */
917 /* coords_arg.w component - array_index for cube arrays */
918 coords
[2] = ac_build_fmad(ctx
, coords_arg
[3], LLVMConstReal(ctx
->f32
, 8.0), coords
[2]);
921 memcpy(coords_arg
, coords
, sizeof(coords
));
926 ac_build_fs_interp(struct ac_llvm_context
*ctx
,
927 LLVMValueRef llvm_chan
,
928 LLVMValueRef attr_number
,
933 LLVMValueRef args
[5];
938 args
[2] = attr_number
;
941 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1",
942 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
947 args
[3] = attr_number
;
950 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2",
951 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
955 ac_build_fs_interp_f16(struct ac_llvm_context
*ctx
,
956 LLVMValueRef llvm_chan
,
957 LLVMValueRef attr_number
,
962 LLVMValueRef args
[6];
967 args
[2] = attr_number
;
968 args
[3] = ctx
->i1false
;
971 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1.f16",
972 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
977 args
[3] = attr_number
;
978 args
[4] = ctx
->i1false
;
981 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2.f16",
982 ctx
->f16
, args
, 6, AC_FUNC_ATTR_READNONE
);
986 ac_build_fs_interp_mov(struct ac_llvm_context
*ctx
,
987 LLVMValueRef parameter
,
988 LLVMValueRef llvm_chan
,
989 LLVMValueRef attr_number
,
992 LLVMValueRef args
[4];
996 args
[2] = attr_number
;
999 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.mov",
1000 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
1004 ac_build_gep_ptr(struct ac_llvm_context
*ctx
,
1005 LLVMValueRef base_ptr
,
1008 return LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1012 ac_build_gep0(struct ac_llvm_context
*ctx
,
1013 LLVMValueRef base_ptr
,
1016 LLVMValueRef indices
[2] = {
1020 return LLVMBuildGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
1023 LLVMValueRef
ac_build_pointer_add(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
1026 return LLVMBuildPointerCast(ctx
->builder
,
1027 LLVMBuildGEP(ctx
->builder
, ptr
, &index
, 1, ""),
1028 LLVMTypeOf(ptr
), "");
1032 ac_build_indexed_store(struct ac_llvm_context
*ctx
,
1033 LLVMValueRef base_ptr
, LLVMValueRef index
,
1036 LLVMBuildStore(ctx
->builder
, value
,
1037 ac_build_gep0(ctx
, base_ptr
, index
));
1041 * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
1042 * It's equivalent to doing a load from &base_ptr[index].
1044 * \param base_ptr Where the array starts.
1045 * \param index The element index into the array.
1046 * \param uniform Whether the base_ptr and index can be assumed to be
1047 * dynamically uniform (i.e. load to an SGPR)
1048 * \param invariant Whether the load is invariant (no other opcodes affect it)
1049 * \param no_unsigned_wraparound
1050 * For all possible re-associations and re-distributions of an expression
1051 * "base_ptr + index * elemsize" into "addr + offset" (excluding GEPs
1052 * without inbounds in base_ptr), this parameter is true if "addr + offset"
1053 * does not result in an unsigned integer wraparound. This is used for
1054 * optimal code generation of 32-bit pointer arithmetic.
1056 * For example, a 32-bit immediate offset that causes a 32-bit unsigned
1057 * integer wraparound can't be an imm offset in s_load_dword, because
1058 * the instruction performs "addr + offset" in 64 bits.
1060 * Expected usage for bindless textures by chaining GEPs:
1061 * // possible unsigned wraparound, don't use InBounds:
1062 * ptr1 = LLVMBuildGEP(base_ptr, index);
1063 * image = load(ptr1); // becomes "s_load ptr1, 0"
1065 * ptr2 = LLVMBuildInBoundsGEP(ptr1, 32 / elemsize);
1066 * sampler = load(ptr2); // becomes "s_load ptr1, 32" thanks to InBounds
1069 ac_build_load_custom(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1070 LLVMValueRef index
, bool uniform
, bool invariant
,
1071 bool no_unsigned_wraparound
)
1073 LLVMValueRef pointer
, result
;
1075 if (no_unsigned_wraparound
&&
1076 LLVMGetPointerAddressSpace(LLVMTypeOf(base_ptr
)) == AC_ADDR_SPACE_CONST_32BIT
)
1077 pointer
= LLVMBuildInBoundsGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1079 pointer
= LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
1082 LLVMSetMetadata(pointer
, ctx
->uniform_md_kind
, ctx
->empty_md
);
1083 result
= LLVMBuildLoad(ctx
->builder
, pointer
, "");
1085 LLVMSetMetadata(result
, ctx
->invariant_load_md_kind
, ctx
->empty_md
);
1089 LLVMValueRef
ac_build_load(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1092 return ac_build_load_custom(ctx
, base_ptr
, index
, false, false, false);
1095 LLVMValueRef
ac_build_load_invariant(struct ac_llvm_context
*ctx
,
1096 LLVMValueRef base_ptr
, LLVMValueRef index
)
1098 return ac_build_load_custom(ctx
, base_ptr
, index
, false, true, false);
1101 /* This assumes that there is no unsigned integer wraparound during the address
1102 * computation, excluding all GEPs within base_ptr. */
1103 LLVMValueRef
ac_build_load_to_sgpr(struct ac_llvm_context
*ctx
,
1104 LLVMValueRef base_ptr
, LLVMValueRef index
)
1106 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, true);
1109 /* See ac_build_load_custom() documentation. */
1110 LLVMValueRef
ac_build_load_to_sgpr_uint_wraparound(struct ac_llvm_context
*ctx
,
1111 LLVMValueRef base_ptr
, LLVMValueRef index
)
1113 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, false);
1116 static unsigned get_load_cache_policy(struct ac_llvm_context
*ctx
,
1117 unsigned cache_policy
)
1119 return cache_policy
|
1120 (ctx
->chip_class
>= GFX10
&& cache_policy
& ac_glc
? ac_dlc
: 0);
1124 ac_build_llvm7_buffer_store_common(struct ac_llvm_context
*ctx
,
1127 LLVMValueRef vindex
,
1128 LLVMValueRef voffset
,
1129 unsigned num_channels
,
1130 unsigned cache_policy
,
1133 LLVMValueRef args
[] = {
1135 LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, ""),
1136 vindex
? vindex
: ctx
->i32_0
,
1138 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_glc
), 0),
1139 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_slc
), 0)
1141 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1143 const char *type_names
[] = {"f32", "v2f32", "v4f32"};
1147 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.store.format.%s",
1150 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.store.%s",
1154 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, ARRAY_SIZE(args
),
1155 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1159 ac_build_llvm8_buffer_store_common(struct ac_llvm_context
*ctx
,
1162 LLVMValueRef vindex
,
1163 LLVMValueRef voffset
,
1164 LLVMValueRef soffset
,
1165 unsigned num_channels
,
1166 LLVMTypeRef return_channel_type
,
1167 unsigned cache_policy
,
1171 LLVMValueRef args
[6];
1174 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1176 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1177 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1178 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1179 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
1180 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, use_format
) && num_channels
== 3 ? 4 : num_channels
;
1181 const char *indexing_kind
= structurized
? "struct" : "raw";
1182 char name
[256], type_name
[8];
1184 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(return_channel_type
, func
) : return_channel_type
;
1185 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1188 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.format.%s",
1189 indexing_kind
, type_name
);
1191 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.store.%s",
1192 indexing_kind
, type_name
);
1195 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
1196 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
1200 ac_build_buffer_store_format(struct ac_llvm_context
*ctx
,
1203 LLVMValueRef vindex
,
1204 LLVMValueRef voffset
,
1205 unsigned num_channels
,
1206 unsigned cache_policy
)
1208 if (HAVE_LLVM
>= 0x800) {
1209 ac_build_llvm8_buffer_store_common(ctx
, rsrc
, data
, vindex
,
1210 voffset
, NULL
, num_channels
,
1211 ctx
->f32
, cache_policy
,
1214 ac_build_llvm7_buffer_store_common(ctx
, rsrc
, data
, vindex
, voffset
,
1215 num_channels
, cache_policy
,
1220 /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
1221 * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
1222 * or v4i32 (num_channels=3,4).
1225 ac_build_buffer_store_dword(struct ac_llvm_context
*ctx
,
1228 unsigned num_channels
,
1229 LLVMValueRef voffset
,
1230 LLVMValueRef soffset
,
1231 unsigned inst_offset
,
1232 unsigned cache_policy
,
1233 bool swizzle_enable_hint
)
1235 /* Split 3 channel stores, because only LLVM 9+ support 3-channel
1237 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false)) {
1238 LLVMValueRef v
[3], v01
;
1240 for (int i
= 0; i
< 3; i
++) {
1241 v
[i
] = LLVMBuildExtractElement(ctx
->builder
, vdata
,
1242 LLVMConstInt(ctx
->i32
, i
, 0), "");
1244 v01
= ac_build_gather_values(ctx
, v
, 2);
1246 ac_build_buffer_store_dword(ctx
, rsrc
, v01
, 2, voffset
,
1247 soffset
, inst_offset
, cache_policy
,
1248 swizzle_enable_hint
);
1249 ac_build_buffer_store_dword(ctx
, rsrc
, v
[2], 1, voffset
,
1250 soffset
, inst_offset
+ 8,
1252 swizzle_enable_hint
);
1256 /* SWIZZLE_ENABLE requires that soffset isn't folded into voffset
1257 * (voffset is swizzled, but soffset isn't swizzled).
1258 * llvm.amdgcn.buffer.store doesn't have a separate soffset parameter.
1260 if (!swizzle_enable_hint
) {
1261 LLVMValueRef offset
= soffset
;
1264 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1265 LLVMConstInt(ctx
->i32
, inst_offset
, 0), "");
1267 if (HAVE_LLVM
>= 0x800) {
1268 ac_build_llvm8_buffer_store_common(ctx
, rsrc
,
1269 ac_to_float(ctx
, vdata
),
1278 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1280 ac_build_llvm7_buffer_store_common(ctx
, rsrc
,
1281 ac_to_float(ctx
, vdata
),
1283 num_channels
, cache_policy
,
1289 static const unsigned dfmts
[] = {
1290 V_008F0C_BUF_DATA_FORMAT_32
,
1291 V_008F0C_BUF_DATA_FORMAT_32_32
,
1292 V_008F0C_BUF_DATA_FORMAT_32_32_32
,
1293 V_008F0C_BUF_DATA_FORMAT_32_32_32_32
1295 unsigned dfmt
= dfmts
[num_channels
- 1];
1296 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1297 LLVMValueRef immoffset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1299 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
1300 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
);
1304 ac_build_llvm7_buffer_load_common(struct ac_llvm_context
*ctx
,
1306 LLVMValueRef vindex
,
1307 LLVMValueRef voffset
,
1308 unsigned num_channels
,
1309 unsigned cache_policy
,
1313 LLVMValueRef args
[] = {
1314 LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, ""),
1315 vindex
? vindex
: ctx
->i32_0
,
1317 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_glc
), 0),
1318 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_slc
), 0)
1320 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1322 LLVMTypeRef types
[] = {ctx
->f32
, ctx
->v2f32
, ctx
->v4f32
};
1323 const char *type_names
[] = {"f32", "v2f32", "v4f32"};
1327 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.load.format.%s",
1330 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.load.%s",
1334 return ac_build_intrinsic(ctx
, name
, types
[func
], args
,
1336 ac_get_load_intr_attribs(can_speculate
));
1340 ac_build_llvm8_buffer_load_common(struct ac_llvm_context
*ctx
,
1342 LLVMValueRef vindex
,
1343 LLVMValueRef voffset
,
1344 LLVMValueRef soffset
,
1345 unsigned num_channels
,
1346 LLVMTypeRef channel_type
,
1347 unsigned cache_policy
,
1352 LLVMValueRef args
[5];
1354 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1356 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1357 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1358 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1359 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1360 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, use_format
) && num_channels
== 3 ? 4 : num_channels
;
1361 const char *indexing_kind
= structurized
? "struct" : "raw";
1362 char name
[256], type_name
[8];
1364 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(channel_type
, func
) : channel_type
;
1365 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1368 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.format.%s",
1369 indexing_kind
, type_name
);
1371 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.%s",
1372 indexing_kind
, type_name
);
1375 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1376 ac_get_load_intr_attribs(can_speculate
));
1380 ac_build_buffer_load(struct ac_llvm_context
*ctx
,
1383 LLVMValueRef vindex
,
1384 LLVMValueRef voffset
,
1385 LLVMValueRef soffset
,
1386 unsigned inst_offset
,
1387 unsigned cache_policy
,
1391 LLVMValueRef offset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1393 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1395 offset
= LLVMBuildAdd(ctx
->builder
, offset
, soffset
, "");
1397 if (allow_smem
&& !(cache_policy
& ac_slc
) &&
1398 (!(cache_policy
& ac_glc
) || (HAVE_LLVM
>= 0x0800 && ctx
->chip_class
>= GFX8
))) {
1399 assert(vindex
== NULL
);
1401 LLVMValueRef result
[8];
1403 for (int i
= 0; i
< num_channels
; i
++) {
1405 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1406 LLVMConstInt(ctx
->i32
, 4, 0), "");
1408 const char *intrname
=
1409 HAVE_LLVM
>= 0x0800 ? "llvm.amdgcn.s.buffer.load.f32"
1410 : "llvm.SI.load.const.v4i32";
1411 unsigned num_args
= HAVE_LLVM
>= 0x0800 ? 3 : 2;
1412 LLVMValueRef args
[3] = {
1415 LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0),
1417 result
[i
] = ac_build_intrinsic(ctx
, intrname
,
1418 ctx
->f32
, args
, num_args
,
1419 AC_FUNC_ATTR_READNONE
|
1420 (HAVE_LLVM
< 0x0800 ? AC_FUNC_ATTR_LEGACY
: 0));
1422 if (num_channels
== 1)
1425 if (num_channels
== 3 && !ac_has_vec3_support(ctx
->chip_class
, false))
1426 result
[num_channels
++] = LLVMGetUndef(ctx
->f32
);
1427 return ac_build_gather_values(ctx
, result
, num_channels
);
1430 if (HAVE_LLVM
>= 0x0800) {
1431 return ac_build_llvm8_buffer_load_common(ctx
, rsrc
, vindex
,
1433 num_channels
, ctx
->f32
,
1435 can_speculate
, false,
1439 return ac_build_llvm7_buffer_load_common(ctx
, rsrc
, vindex
, offset
,
1440 num_channels
, cache_policy
,
1441 can_speculate
, false);
1444 LLVMValueRef
ac_build_buffer_load_format(struct ac_llvm_context
*ctx
,
1446 LLVMValueRef vindex
,
1447 LLVMValueRef voffset
,
1448 unsigned num_channels
,
1449 unsigned cache_policy
,
1452 if (HAVE_LLVM
>= 0x800) {
1453 return ac_build_llvm8_buffer_load_common(ctx
, rsrc
, vindex
, voffset
, ctx
->i32_0
,
1454 num_channels
, ctx
->f32
,
1455 cache_policy
, can_speculate
, true, true);
1457 return ac_build_llvm7_buffer_load_common(ctx
, rsrc
, vindex
, voffset
,
1458 num_channels
, cache_policy
,
1459 can_speculate
, true);
1462 LLVMValueRef
ac_build_buffer_load_format_gfx9_safe(struct ac_llvm_context
*ctx
,
1464 LLVMValueRef vindex
,
1465 LLVMValueRef voffset
,
1466 unsigned num_channels
,
1467 unsigned cache_policy
,
1470 if (HAVE_LLVM
>= 0x800) {
1471 return ac_build_llvm8_buffer_load_common(ctx
, rsrc
, vindex
, voffset
, ctx
->i32_0
,
1472 num_channels
, ctx
->f32
,
1473 cache_policy
, can_speculate
, true, true);
1476 LLVMValueRef elem_count
= LLVMBuildExtractElement(ctx
->builder
, rsrc
, LLVMConstInt(ctx
->i32
, 2, 0), "");
1477 LLVMValueRef stride
= LLVMBuildExtractElement(ctx
->builder
, rsrc
, ctx
->i32_1
, "");
1478 stride
= LLVMBuildLShr(ctx
->builder
, stride
, LLVMConstInt(ctx
->i32
, 16, 0), "");
1480 LLVMValueRef new_elem_count
= LLVMBuildSelect(ctx
->builder
,
1481 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, elem_count
, stride
, ""),
1482 elem_count
, stride
, "");
1484 LLVMValueRef new_rsrc
= LLVMBuildInsertElement(ctx
->builder
, rsrc
, new_elem_count
,
1485 LLVMConstInt(ctx
->i32
, 2, 0), "");
1487 return ac_build_llvm7_buffer_load_common(ctx
, new_rsrc
, vindex
, voffset
,
1488 num_channels
, cache_policy
,
1489 can_speculate
, true);
1492 /// Translate a (dfmt, nfmt) pair into a chip-appropriate combined format
1493 /// value for LLVM8+ tbuffer intrinsics.
1495 ac_get_tbuffer_format(struct ac_llvm_context
*ctx
,
1496 unsigned dfmt
, unsigned nfmt
)
1498 if (ctx
->chip_class
>= GFX10
) {
1501 default: unreachable("bad dfmt");
1502 case V_008F0C_BUF_DATA_FORMAT_8
: format
= V_008F0C_IMG_FORMAT_8_UINT
; break;
1503 case V_008F0C_BUF_DATA_FORMAT_8_8
: format
= V_008F0C_IMG_FORMAT_8_8_UINT
; break;
1504 case V_008F0C_BUF_DATA_FORMAT_8_8_8_8
: format
= V_008F0C_IMG_FORMAT_8_8_8_8_UINT
; break;
1505 case V_008F0C_BUF_DATA_FORMAT_16
: format
= V_008F0C_IMG_FORMAT_16_UINT
; break;
1506 case V_008F0C_BUF_DATA_FORMAT_16_16
: format
= V_008F0C_IMG_FORMAT_16_16_UINT
; break;
1507 case V_008F0C_BUF_DATA_FORMAT_16_16_16_16
: format
= V_008F0C_IMG_FORMAT_16_16_16_16_UINT
; break;
1508 case V_008F0C_BUF_DATA_FORMAT_32
: format
= V_008F0C_IMG_FORMAT_32_UINT
; break;
1509 case V_008F0C_BUF_DATA_FORMAT_32_32
: format
= V_008F0C_IMG_FORMAT_32_32_UINT
; break;
1510 case V_008F0C_BUF_DATA_FORMAT_32_32_32
: format
= V_008F0C_IMG_FORMAT_32_32_32_UINT
; break;
1511 case V_008F0C_BUF_DATA_FORMAT_32_32_32_32
: format
= V_008F0C_IMG_FORMAT_32_32_32_32_UINT
; break;
1512 case V_008F0C_BUF_DATA_FORMAT_2_10_10_10
: format
= V_008F0C_IMG_FORMAT_2_10_10_10_UINT
; break;
1515 // Use the regularity properties of the combined format enum.
1517 // Note: float is incompatible with 8-bit data formats,
1518 // [us]{norm,scaled} are incomparible with 32-bit data formats.
1519 // [us]scaled are not writable.
1521 case V_008F0C_BUF_NUM_FORMAT_UNORM
: format
-= 4; break;
1522 case V_008F0C_BUF_NUM_FORMAT_SNORM
: format
-= 3; break;
1523 case V_008F0C_BUF_NUM_FORMAT_USCALED
: format
-= 2; break;
1524 case V_008F0C_BUF_NUM_FORMAT_SSCALED
: format
-= 1; break;
1525 default: unreachable("bad nfmt");
1526 case V_008F0C_BUF_NUM_FORMAT_UINT
: break;
1527 case V_008F0C_BUF_NUM_FORMAT_SINT
: format
+= 1; break;
1528 case V_008F0C_BUF_NUM_FORMAT_FLOAT
: format
+= 2; break;
1533 return dfmt
| (nfmt
<< 4);
1538 ac_build_llvm8_tbuffer_load(struct ac_llvm_context
*ctx
,
1540 LLVMValueRef vindex
,
1541 LLVMValueRef voffset
,
1542 LLVMValueRef soffset
,
1543 unsigned num_channels
,
1546 unsigned cache_policy
,
1550 LLVMValueRef args
[6];
1552 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1554 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1555 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1556 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1557 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
, dfmt
, nfmt
), 0);
1558 args
[idx
++] = LLVMConstInt(ctx
->i32
, get_load_cache_policy(ctx
, cache_policy
), 0);
1559 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
1560 const char *indexing_kind
= structurized
? "struct" : "raw";
1561 char name
[256], type_name
[8];
1563 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
1564 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
1566 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.load.%s",
1567 indexing_kind
, type_name
);
1569 return ac_build_intrinsic(ctx
, name
, type
, args
, idx
,
1570 ac_get_load_intr_attribs(can_speculate
));
1574 ac_build_tbuffer_load(struct ac_llvm_context
*ctx
,
1576 LLVMValueRef vindex
,
1577 LLVMValueRef voffset
,
1578 LLVMValueRef soffset
,
1579 LLVMValueRef immoffset
,
1580 unsigned num_channels
,
1583 unsigned cache_policy
,
1585 bool structurized
) /* only matters for LLVM 8+ */
1587 if (HAVE_LLVM
>= 0x800) {
1588 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1590 return ac_build_llvm8_tbuffer_load(ctx
, rsrc
, vindex
, voffset
,
1591 soffset
, num_channels
,
1592 dfmt
, nfmt
, cache_policy
,
1593 can_speculate
, structurized
);
1596 LLVMValueRef args
[] = {
1598 vindex
? vindex
: ctx
->i32_0
,
1602 LLVMConstInt(ctx
->i32
, dfmt
, false),
1603 LLVMConstInt(ctx
->i32
, nfmt
, false),
1604 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_glc
), false),
1605 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_slc
), false),
1607 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1608 LLVMTypeRef types
[] = {ctx
->i32
, ctx
->v2i32
, ctx
->v4i32
};
1609 const char *type_names
[] = {"i32", "v2i32", "v4i32"};
1612 snprintf(name
, sizeof(name
), "llvm.amdgcn.tbuffer.load.%s",
1615 return ac_build_intrinsic(ctx
, name
, types
[func
], args
, 9,
1616 ac_get_load_intr_attribs(can_speculate
));
1620 ac_build_struct_tbuffer_load(struct ac_llvm_context
*ctx
,
1622 LLVMValueRef vindex
,
1623 LLVMValueRef voffset
,
1624 LLVMValueRef soffset
,
1625 LLVMValueRef immoffset
,
1626 unsigned num_channels
,
1629 unsigned cache_policy
,
1632 return ac_build_tbuffer_load(ctx
, rsrc
, vindex
, voffset
, soffset
,
1633 immoffset
, num_channels
, dfmt
, nfmt
,
1634 cache_policy
, can_speculate
, true);
1638 ac_build_raw_tbuffer_load(struct ac_llvm_context
*ctx
,
1640 LLVMValueRef voffset
,
1641 LLVMValueRef soffset
,
1642 LLVMValueRef immoffset
,
1643 unsigned num_channels
,
1646 unsigned cache_policy
,
1649 return ac_build_tbuffer_load(ctx
, rsrc
, NULL
, voffset
, soffset
,
1650 immoffset
, num_channels
, dfmt
, nfmt
,
1651 cache_policy
, can_speculate
, false);
1655 ac_build_tbuffer_load_short(struct ac_llvm_context
*ctx
,
1657 LLVMValueRef voffset
,
1658 LLVMValueRef soffset
,
1659 LLVMValueRef immoffset
,
1660 unsigned cache_policy
)
1664 if (HAVE_LLVM
>= 0x900) {
1665 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1667 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1668 res
= ac_build_llvm8_buffer_load_common(ctx
, rsrc
, NULL
,
1670 1, ctx
->i16
, cache_policy
,
1671 false, false, false);
1673 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1674 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1676 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1677 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1680 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i16
, "");
1687 ac_build_tbuffer_load_byte(struct ac_llvm_context
*ctx
,
1689 LLVMValueRef voffset
,
1690 LLVMValueRef soffset
,
1691 LLVMValueRef immoffset
,
1692 unsigned cache_policy
)
1696 if (HAVE_LLVM
>= 0x900) {
1697 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1699 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
1700 res
= ac_build_llvm8_buffer_load_common(ctx
, rsrc
, NULL
,
1702 1, ctx
->i8
, cache_policy
,
1703 false, false, false);
1705 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
1706 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1708 res
= ac_build_raw_tbuffer_load(ctx
, rsrc
, voffset
, soffset
,
1709 immoffset
, 1, dfmt
, nfmt
, cache_policy
,
1712 res
= LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i8
, "");
1719 * Convert an 11- or 10-bit unsigned floating point number to an f32.
1721 * The input exponent is expected to be biased analogous to IEEE-754, i.e. by
1722 * 2^(exp_bits-1) - 1 (as defined in OpenGL and other graphics APIs).
1725 ac_ufN_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned exp_bits
, unsigned mant_bits
)
1727 assert(LLVMTypeOf(src
) == ctx
->i32
);
1730 LLVMValueRef mantissa
;
1731 mantissa
= LLVMBuildAnd(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, (1 << mant_bits
) - 1, false), "");
1733 /* Converting normal numbers is just a shift + correcting the exponent bias */
1734 unsigned normal_shift
= 23 - mant_bits
;
1735 unsigned bias_shift
= 127 - ((1 << (exp_bits
- 1)) - 1);
1736 LLVMValueRef shifted
, normal
;
1738 shifted
= LLVMBuildShl(ctx
->builder
, src
, LLVMConstInt(ctx
->i32
, normal_shift
, false), "");
1739 normal
= LLVMBuildAdd(ctx
->builder
, shifted
, LLVMConstInt(ctx
->i32
, bias_shift
<< 23, false), "");
1741 /* Converting nan/inf numbers is the same, but with a different exponent update */
1742 LLVMValueRef naninf
;
1743 naninf
= LLVMBuildOr(ctx
->builder
, normal
, LLVMConstInt(ctx
->i32
, 0xff << 23, false), "");
1745 /* Converting denormals is the complex case: determine the leading zeros of the
1746 * mantissa to obtain the correct shift for the mantissa and exponent correction.
1748 LLVMValueRef denormal
;
1749 LLVMValueRef params
[2] = {
1751 ctx
->i1true
, /* result can be undef when arg is 0 */
1753 LLVMValueRef ctlz
= ac_build_intrinsic(ctx
, "llvm.ctlz.i32", ctx
->i32
,
1754 params
, 2, AC_FUNC_ATTR_READNONE
);
1756 /* Shift such that the leading 1 ends up as the LSB of the exponent field. */
1757 tmp
= LLVMBuildSub(ctx
->builder
, ctlz
, LLVMConstInt(ctx
->i32
, 8, false), "");
1758 denormal
= LLVMBuildShl(ctx
->builder
, mantissa
, tmp
, "");
1760 unsigned denormal_exp
= bias_shift
+ (32 - mant_bits
) - 1;
1761 tmp
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, denormal_exp
, false), ctlz
, "");
1762 tmp
= LLVMBuildShl(ctx
->builder
, tmp
, LLVMConstInt(ctx
->i32
, 23, false), "");
1763 denormal
= LLVMBuildAdd(ctx
->builder
, denormal
, tmp
, "");
1765 /* Select the final result. */
1766 LLVMValueRef result
;
1768 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1769 LLVMConstInt(ctx
->i32
, ((1 << exp_bits
) - 1) << mant_bits
, false), "");
1770 result
= LLVMBuildSelect(ctx
->builder
, tmp
, naninf
, normal
, "");
1772 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, src
,
1773 LLVMConstInt(ctx
->i32
, 1 << mant_bits
, false), "");
1774 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, denormal
, "");
1776 tmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, src
, ctx
->i32_0
, "");
1777 result
= LLVMBuildSelect(ctx
->builder
, tmp
, result
, ctx
->i32_0
, "");
1779 return ac_to_float(ctx
, result
);
1783 * Generate a fully general open coded buffer format fetch with all required
1784 * fixups suitable for vertex fetch, using non-format buffer loads.
1786 * Some combinations of argument values have special interpretations:
1787 * - size = 8 bytes, format = fixed indicates PIPE_FORMAT_R11G11B10_FLOAT
1788 * - size = 8 bytes, format != {float,fixed} indicates a 2_10_10_10 data format
1790 * \param log_size log(size of channel in bytes)
1791 * \param num_channels number of channels (1 to 4)
1792 * \param format AC_FETCH_FORMAT_xxx value
1793 * \param reverse whether XYZ channels are reversed
1794 * \param known_aligned whether the source is known to be aligned to hardware's
1795 * effective element size for loading the given format
1796 * (note: this means dword alignment for 8_8_8_8, 16_16, etc.)
1797 * \param rsrc buffer resource descriptor
1798 * \return the resulting vector of floats or integers bitcast to <4 x i32>
1801 ac_build_opencoded_load_format(struct ac_llvm_context
*ctx
,
1803 unsigned num_channels
,
1808 LLVMValueRef vindex
,
1809 LLVMValueRef voffset
,
1810 LLVMValueRef soffset
,
1811 unsigned cache_policy
,
1815 unsigned load_log_size
= log_size
;
1816 unsigned load_num_channels
= num_channels
;
1817 if (log_size
== 3) {
1819 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1820 load_num_channels
= 2 * num_channels
;
1822 load_num_channels
= 1; /* 10_11_11 or 2_10_10_10 */
1826 int log_recombine
= 0;
1827 if (ctx
->chip_class
== GFX6
&& !known_aligned
) {
1828 /* Avoid alignment restrictions by loading one byte at a time. */
1829 load_num_channels
<<= load_log_size
;
1830 log_recombine
= load_log_size
;
1832 } else if (load_num_channels
== 2 || load_num_channels
== 4) {
1833 log_recombine
= -util_logbase2(load_num_channels
);
1834 load_num_channels
= 1;
1835 load_log_size
+= -log_recombine
;
1838 assert(load_log_size
>= 2 || HAVE_LLVM
>= 0x0900);
1840 LLVMValueRef loads
[32]; /* up to 32 bytes */
1841 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1842 tmp
= LLVMBuildAdd(ctx
->builder
, soffset
,
1843 LLVMConstInt(ctx
->i32
, i
<< load_log_size
, false), "");
1844 if (HAVE_LLVM
>= 0x0800) {
1845 LLVMTypeRef channel_type
= load_log_size
== 0 ? ctx
->i8
:
1846 load_log_size
== 1 ? ctx
->i16
: ctx
->i32
;
1847 unsigned num_channels
= 1 << (MAX2(load_log_size
, 2) - 2);
1848 loads
[i
] = ac_build_llvm8_buffer_load_common(
1849 ctx
, rsrc
, vindex
, voffset
, tmp
,
1850 num_channels
, channel_type
, cache_policy
,
1851 can_speculate
, false, true);
1853 tmp
= LLVMBuildAdd(ctx
->builder
, voffset
, tmp
, "");
1854 loads
[i
] = ac_build_llvm7_buffer_load_common(
1855 ctx
, rsrc
, vindex
, tmp
,
1856 1 << (load_log_size
- 2), cache_policy
, can_speculate
, false);
1858 if (load_log_size
>= 2)
1859 loads
[i
] = ac_to_integer(ctx
, loads
[i
]);
1862 if (log_recombine
> 0) {
1863 /* Recombine bytes if necessary (GFX6 only) */
1864 LLVMTypeRef dst_type
= log_recombine
== 2 ? ctx
->i32
: ctx
->i16
;
1866 for (unsigned src
= 0, dst
= 0; src
< load_num_channels
; ++dst
) {
1867 LLVMValueRef accum
= NULL
;
1868 for (unsigned i
= 0; i
< (1 << log_recombine
); ++i
, ++src
) {
1869 tmp
= LLVMBuildZExt(ctx
->builder
, loads
[src
], dst_type
, "");
1873 tmp
= LLVMBuildShl(ctx
->builder
, tmp
,
1874 LLVMConstInt(dst_type
, 8 * i
, false), "");
1875 accum
= LLVMBuildOr(ctx
->builder
, accum
, tmp
, "");
1880 } else if (log_recombine
< 0) {
1881 /* Split vectors of dwords */
1882 if (load_log_size
> 2) {
1883 assert(load_num_channels
== 1);
1884 LLVMValueRef loaded
= loads
[0];
1885 unsigned log_split
= load_log_size
- 2;
1886 log_recombine
+= log_split
;
1887 load_num_channels
= 1 << log_split
;
1889 for (unsigned i
= 0; i
< load_num_channels
; ++i
) {
1890 tmp
= LLVMConstInt(ctx
->i32
, i
, false);
1891 loads
[i
] = LLVMBuildExtractElement(ctx
->builder
, loaded
, tmp
, "");
1895 /* Further split dwords and shorts if required */
1896 if (log_recombine
< 0) {
1897 for (unsigned src
= load_num_channels
,
1898 dst
= load_num_channels
<< -log_recombine
;
1900 unsigned dst_bits
= 1 << (3 + load_log_size
+ log_recombine
);
1901 LLVMTypeRef dst_type
= LLVMIntTypeInContext(ctx
->context
, dst_bits
);
1902 LLVMValueRef loaded
= loads
[src
- 1];
1903 LLVMTypeRef loaded_type
= LLVMTypeOf(loaded
);
1904 for (unsigned i
= 1 << -log_recombine
; i
> 0; --i
, --dst
) {
1905 tmp
= LLVMConstInt(loaded_type
, dst_bits
* (i
- 1), false);
1906 tmp
= LLVMBuildLShr(ctx
->builder
, loaded
, tmp
, "");
1907 loads
[dst
- 1] = LLVMBuildTrunc(ctx
->builder
, tmp
, dst_type
, "");
1913 if (log_size
== 3) {
1914 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1915 for (unsigned i
= 0; i
< num_channels
; ++i
) {
1916 tmp
= ac_build_gather_values(ctx
, &loads
[2 * i
], 2);
1917 loads
[i
] = LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->f64
, "");
1919 } else if (format
== AC_FETCH_FORMAT_FIXED
) {
1920 /* 10_11_11_FLOAT */
1921 LLVMValueRef data
= loads
[0];
1922 LLVMValueRef i32_2047
= LLVMConstInt(ctx
->i32
, 2047, false);
1923 LLVMValueRef r
= LLVMBuildAnd(ctx
->builder
, data
, i32_2047
, "");
1924 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 11, false), "");
1925 LLVMValueRef g
= LLVMBuildAnd(ctx
->builder
, tmp
, i32_2047
, "");
1926 LLVMValueRef b
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 22, false), "");
1928 loads
[0] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, r
, 5, 6));
1929 loads
[1] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, g
, 5, 6));
1930 loads
[2] = ac_to_integer(ctx
, ac_ufN_to_float(ctx
, b
, 5, 5));
1934 format
= AC_FETCH_FORMAT_FLOAT
;
1936 /* 2_10_10_10 data formats */
1937 LLVMValueRef data
= loads
[0];
1938 LLVMTypeRef i10
= LLVMIntTypeInContext(ctx
->context
, 10);
1939 LLVMTypeRef i2
= LLVMIntTypeInContext(ctx
->context
, 2);
1940 loads
[0] = LLVMBuildTrunc(ctx
->builder
, data
, i10
, "");
1941 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 10, false), "");
1942 loads
[1] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1943 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 20, false), "");
1944 loads
[2] = LLVMBuildTrunc(ctx
->builder
, tmp
, i10
, "");
1945 tmp
= LLVMBuildLShr(ctx
->builder
, data
, LLVMConstInt(ctx
->i32
, 30, false), "");
1946 loads
[3] = LLVMBuildTrunc(ctx
->builder
, tmp
, i2
, "");
1952 if (format
== AC_FETCH_FORMAT_FLOAT
) {
1953 if (log_size
!= 2) {
1954 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1955 tmp
= ac_to_float(ctx
, loads
[chan
]);
1957 tmp
= LLVMBuildFPTrunc(ctx
->builder
, tmp
, ctx
->f32
, "");
1958 else if (log_size
== 1)
1959 tmp
= LLVMBuildFPExt(ctx
->builder
, tmp
, ctx
->f32
, "");
1960 loads
[chan
] = ac_to_integer(ctx
, tmp
);
1963 } else if (format
== AC_FETCH_FORMAT_UINT
) {
1964 if (log_size
!= 2) {
1965 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1966 loads
[chan
] = LLVMBuildZExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1968 } else if (format
== AC_FETCH_FORMAT_SINT
) {
1969 if (log_size
!= 2) {
1970 for (unsigned chan
= 0; chan
< num_channels
; ++chan
)
1971 loads
[chan
] = LLVMBuildSExt(ctx
->builder
, loads
[chan
], ctx
->i32
, "");
1974 bool unsign
= format
== AC_FETCH_FORMAT_UNORM
||
1975 format
== AC_FETCH_FORMAT_USCALED
||
1976 format
== AC_FETCH_FORMAT_UINT
;
1978 for (unsigned chan
= 0; chan
< num_channels
; ++chan
) {
1980 tmp
= LLVMBuildUIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1982 tmp
= LLVMBuildSIToFP(ctx
->builder
, loads
[chan
], ctx
->f32
, "");
1985 LLVMValueRef scale
= NULL
;
1986 if (format
== AC_FETCH_FORMAT_FIXED
) {
1987 assert(log_size
== 2);
1988 scale
= LLVMConstReal(ctx
->f32
, 1.0 / 0x10000);
1989 } else if (format
== AC_FETCH_FORMAT_UNORM
) {
1990 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1991 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << bits
) - 1));
1992 } else if (format
== AC_FETCH_FORMAT_SNORM
) {
1993 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(loads
[chan
]));
1994 scale
= LLVMConstReal(ctx
->f32
, 1.0 / (((uint64_t)1 << (bits
- 1)) - 1));
1997 tmp
= LLVMBuildFMul(ctx
->builder
, tmp
, scale
, "");
1999 if (format
== AC_FETCH_FORMAT_SNORM
) {
2000 /* Clamp to [-1, 1] */
2001 LLVMValueRef neg_one
= LLVMConstReal(ctx
->f32
, -1.0);
2002 LLVMValueRef clamp
=
2003 LLVMBuildFCmp(ctx
->builder
, LLVMRealULT
, tmp
, neg_one
, "");
2004 tmp
= LLVMBuildSelect(ctx
->builder
, clamp
, neg_one
, tmp
, "");
2007 loads
[chan
] = ac_to_integer(ctx
, tmp
);
2011 while (num_channels
< 4) {
2012 if (format
== AC_FETCH_FORMAT_UINT
|| format
== AC_FETCH_FORMAT_SINT
) {
2013 loads
[num_channels
] = num_channels
== 3 ? ctx
->i32_1
: ctx
->i32_0
;
2015 loads
[num_channels
] = ac_to_integer(ctx
, num_channels
== 3 ? ctx
->f32_1
: ctx
->f32_0
);
2022 loads
[0] = loads
[2];
2026 return ac_build_gather_values(ctx
, loads
, 4);
2030 ac_build_llvm8_tbuffer_store(struct ac_llvm_context
*ctx
,
2033 LLVMValueRef vindex
,
2034 LLVMValueRef voffset
,
2035 LLVMValueRef soffset
,
2036 unsigned num_channels
,
2039 unsigned cache_policy
,
2042 LLVMValueRef args
[7];
2044 args
[idx
++] = vdata
;
2045 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
2047 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
2048 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
2049 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
2050 args
[idx
++] = LLVMConstInt(ctx
->i32
, ac_get_tbuffer_format(ctx
, dfmt
, nfmt
), 0);
2051 args
[idx
++] = LLVMConstInt(ctx
->i32
, cache_policy
, 0);
2052 unsigned func
= !ac_has_vec3_support(ctx
->chip_class
, true) && num_channels
== 3 ? 4 : num_channels
;
2053 const char *indexing_kind
= structurized
? "struct" : "raw";
2054 char name
[256], type_name
[8];
2056 LLVMTypeRef type
= func
> 1 ? LLVMVectorType(ctx
->i32
, func
) : ctx
->i32
;
2057 ac_build_type_name_for_intr(type
, type_name
, sizeof(type_name
));
2059 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.store.%s",
2060 indexing_kind
, type_name
);
2062 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, args
, idx
,
2063 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
2067 ac_build_tbuffer_store(struct ac_llvm_context
*ctx
,
2070 LLVMValueRef vindex
,
2071 LLVMValueRef voffset
,
2072 LLVMValueRef soffset
,
2073 LLVMValueRef immoffset
,
2074 unsigned num_channels
,
2077 unsigned cache_policy
,
2078 bool structurized
) /* only matters for LLVM 8+ */
2080 if (HAVE_LLVM
>= 0x800) {
2081 voffset
= LLVMBuildAdd(ctx
->builder
,
2082 voffset
? voffset
: ctx
->i32_0
,
2085 ac_build_llvm8_tbuffer_store(ctx
, rsrc
, vdata
, vindex
, voffset
,
2086 soffset
, num_channels
, dfmt
, nfmt
,
2087 cache_policy
, structurized
);
2089 LLVMValueRef params
[] = {
2092 vindex
? vindex
: ctx
->i32_0
,
2093 voffset
? voffset
: ctx
->i32_0
,
2094 soffset
? soffset
: ctx
->i32_0
,
2096 LLVMConstInt(ctx
->i32
, dfmt
, false),
2097 LLVMConstInt(ctx
->i32
, nfmt
, false),
2098 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_glc
), false),
2099 LLVMConstInt(ctx
->i1
, !!(cache_policy
& ac_slc
), false),
2101 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
2102 const char *type_names
[] = {"i32", "v2i32", "v4i32"};
2105 snprintf(name
, sizeof(name
), "llvm.amdgcn.tbuffer.store.%s",
2108 ac_build_intrinsic(ctx
, name
, ctx
->voidt
, params
, 10,
2109 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
);
2114 ac_build_struct_tbuffer_store(struct ac_llvm_context
*ctx
,
2117 LLVMValueRef vindex
,
2118 LLVMValueRef voffset
,
2119 LLVMValueRef soffset
,
2120 LLVMValueRef immoffset
,
2121 unsigned num_channels
,
2124 unsigned cache_policy
)
2126 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, vindex
, voffset
, soffset
,
2127 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
2132 ac_build_raw_tbuffer_store(struct ac_llvm_context
*ctx
,
2135 LLVMValueRef voffset
,
2136 LLVMValueRef soffset
,
2137 LLVMValueRef immoffset
,
2138 unsigned num_channels
,
2141 unsigned cache_policy
)
2143 ac_build_tbuffer_store(ctx
, rsrc
, vdata
, NULL
, voffset
, soffset
,
2144 immoffset
, num_channels
, dfmt
, nfmt
, cache_policy
,
2149 ac_build_tbuffer_store_short(struct ac_llvm_context
*ctx
,
2152 LLVMValueRef voffset
,
2153 LLVMValueRef soffset
,
2154 unsigned cache_policy
)
2156 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i16
, "");
2158 if (HAVE_LLVM
>= 0x900) {
2159 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
2160 ac_build_llvm8_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
2161 voffset
, soffset
, 1,
2162 ctx
->i16
, cache_policy
,
2165 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
2166 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
2168 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
2170 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
2171 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
2176 ac_build_tbuffer_store_byte(struct ac_llvm_context
*ctx
,
2179 LLVMValueRef voffset
,
2180 LLVMValueRef soffset
,
2181 unsigned cache_policy
)
2183 vdata
= LLVMBuildBitCast(ctx
->builder
, vdata
, ctx
->i8
, "");
2185 if (HAVE_LLVM
>= 0x900) {
2186 /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */
2187 ac_build_llvm8_buffer_store_common(ctx
, rsrc
, vdata
, NULL
,
2188 voffset
, soffset
, 1,
2189 ctx
->i8
, cache_policy
,
2192 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_8
;
2193 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
2195 vdata
= LLVMBuildZExt(ctx
->builder
, vdata
, ctx
->i32
, "");
2197 ac_build_raw_tbuffer_store(ctx
, rsrc
, vdata
, voffset
, soffset
,
2198 ctx
->i32_0
, 1, dfmt
, nfmt
, cache_policy
);
2202 * Set range metadata on an instruction. This can only be used on load and
2203 * call instructions. If you know an instruction can only produce the values
2204 * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
2205 * \p lo is the minimum value inclusive.
2206 * \p hi is the maximum value exclusive.
2208 static void set_range_metadata(struct ac_llvm_context
*ctx
,
2209 LLVMValueRef value
, unsigned lo
, unsigned hi
)
2211 LLVMValueRef range_md
, md_args
[2];
2212 LLVMTypeRef type
= LLVMTypeOf(value
);
2213 LLVMContextRef context
= LLVMGetTypeContext(type
);
2215 md_args
[0] = LLVMConstInt(type
, lo
, false);
2216 md_args
[1] = LLVMConstInt(type
, hi
, false);
2217 range_md
= LLVMMDNodeInContext(context
, md_args
, 2);
2218 LLVMSetMetadata(value
, ctx
->range_md_kind
, range_md
);
2222 ac_get_thread_id(struct ac_llvm_context
*ctx
)
2226 LLVMValueRef tid_args
[2];
2227 tid_args
[0] = LLVMConstInt(ctx
->i32
, 0xffffffff, false);
2228 tid_args
[1] = ctx
->i32_0
;
2229 tid_args
[1] = ac_build_intrinsic(ctx
,
2230 "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
2231 tid_args
, 2, AC_FUNC_ATTR_READNONE
);
2233 if (ctx
->wave_size
== 32) {
2236 tid
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi",
2238 2, AC_FUNC_ATTR_READNONE
);
2240 set_range_metadata(ctx
, tid
, 0, ctx
->wave_size
);
2245 * AMD GCN implements derivatives using the local data store (LDS)
2246 * All writes to the LDS happen in all executing threads at
2247 * the same time. TID is the Thread ID for the current
2248 * thread and is a value between 0 and 63, representing
2249 * the thread's position in the wavefront.
2251 * For the pixel shader threads are grouped into quads of four pixels.
2252 * The TIDs of the pixels of a quad are:
2260 * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
2261 * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
2262 * the current pixel's column, and masking with 0xfffffffe yields the TID
2263 * of the left pixel of the current pixel's row.
2265 * Adding 1 yields the TID of the pixel to the right of the left pixel, and
2266 * adding 2 yields the TID of the pixel below the top pixel.
2269 ac_build_ddxy(struct ac_llvm_context
*ctx
,
2274 unsigned tl_lanes
[4], trbl_lanes
[4];
2275 char name
[32], type
[8];
2276 LLVMValueRef tl
, trbl
;
2277 LLVMTypeRef result_type
;
2278 LLVMValueRef result
;
2280 result_type
= ac_to_float_type(ctx
, LLVMTypeOf(val
));
2282 if (result_type
== ctx
->f16
)
2283 val
= LLVMBuildZExt(ctx
->builder
, val
, ctx
->i32
, "");
2285 for (unsigned i
= 0; i
< 4; ++i
) {
2286 tl_lanes
[i
] = i
& mask
;
2287 trbl_lanes
[i
] = (i
& mask
) + idx
;
2290 tl
= ac_build_quad_swizzle(ctx
, val
,
2291 tl_lanes
[0], tl_lanes
[1],
2292 tl_lanes
[2], tl_lanes
[3]);
2293 trbl
= ac_build_quad_swizzle(ctx
, val
,
2294 trbl_lanes
[0], trbl_lanes
[1],
2295 trbl_lanes
[2], trbl_lanes
[3]);
2297 if (result_type
== ctx
->f16
) {
2298 tl
= LLVMBuildTrunc(ctx
->builder
, tl
, ctx
->i16
, "");
2299 trbl
= LLVMBuildTrunc(ctx
->builder
, trbl
, ctx
->i16
, "");
2302 tl
= LLVMBuildBitCast(ctx
->builder
, tl
, result_type
, "");
2303 trbl
= LLVMBuildBitCast(ctx
->builder
, trbl
, result_type
, "");
2304 result
= LLVMBuildFSub(ctx
->builder
, trbl
, tl
, "");
2306 ac_build_type_name_for_intr(result_type
, type
, sizeof(type
));
2307 snprintf(name
, sizeof(name
), "llvm.amdgcn.wqm.%s", type
);
2309 return ac_build_intrinsic(ctx
, name
, result_type
, &result
, 1, 0);
2313 ac_build_sendmsg(struct ac_llvm_context
*ctx
,
2315 LLVMValueRef wave_id
)
2317 LLVMValueRef args
[2];
2318 args
[0] = LLVMConstInt(ctx
->i32
, msg
, false);
2320 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.sendmsg", ctx
->voidt
, args
, 2, 0);
2324 ac_build_imsb(struct ac_llvm_context
*ctx
,
2326 LLVMTypeRef dst_type
)
2328 LLVMValueRef msb
= ac_build_intrinsic(ctx
, "llvm.amdgcn.sffbh.i32",
2330 AC_FUNC_ATTR_READNONE
);
2332 /* The HW returns the last bit index from MSB, but NIR/TGSI wants
2333 * the index from LSB. Invert it by doing "31 - msb". */
2334 msb
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, 31, false),
2337 LLVMValueRef all_ones
= LLVMConstInt(ctx
->i32
, -1, true);
2338 LLVMValueRef cond
= LLVMBuildOr(ctx
->builder
,
2339 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2340 arg
, ctx
->i32_0
, ""),
2341 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
2342 arg
, all_ones
, ""), "");
2344 return LLVMBuildSelect(ctx
->builder
, cond
, all_ones
, msb
, "");
2348 ac_build_umsb(struct ac_llvm_context
*ctx
,
2350 LLVMTypeRef dst_type
)
2352 const char *intrin_name
;
2354 LLVMValueRef highest_bit
;
2358 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(arg
));
2361 intrin_name
= "llvm.ctlz.i64";
2363 highest_bit
= LLVMConstInt(ctx
->i64
, 63, false);
2367 intrin_name
= "llvm.ctlz.i32";
2369 highest_bit
= LLVMConstInt(ctx
->i32
, 31, false);
2373 intrin_name
= "llvm.ctlz.i16";
2375 highest_bit
= LLVMConstInt(ctx
->i16
, 15, false);
2379 intrin_name
= "llvm.ctlz.i8";
2381 highest_bit
= LLVMConstInt(ctx
->i8
, 7, false);
2385 unreachable(!"invalid bitsize");
2389 LLVMValueRef params
[2] = {
2394 LLVMValueRef msb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
2396 AC_FUNC_ATTR_READNONE
);
2398 /* The HW returns the last bit index from MSB, but TGSI/NIR wants
2399 * the index from LSB. Invert it by doing "31 - msb". */
2400 msb
= LLVMBuildSub(ctx
->builder
, highest_bit
, msb
, "");
2402 if (bitsize
== 64) {
2403 msb
= LLVMBuildTrunc(ctx
->builder
, msb
, ctx
->i32
, "");
2404 } else if (bitsize
< 32) {
2405 msb
= LLVMBuildSExt(ctx
->builder
, msb
, ctx
->i32
, "");
2408 /* check for zero */
2409 return LLVMBuildSelect(ctx
->builder
,
2410 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, arg
, zero
, ""),
2411 LLVMConstInt(ctx
->i32
, -1, true), msb
, "");
2414 LLVMValueRef
ac_build_fmin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2418 snprintf(name
, sizeof(name
), "llvm.minnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
2419 LLVMValueRef args
[2] = {a
, b
};
2420 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2421 AC_FUNC_ATTR_READNONE
);
2424 LLVMValueRef
ac_build_fmax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2428 snprintf(name
, sizeof(name
), "llvm.maxnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
2429 LLVMValueRef args
[2] = {a
, b
};
2430 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
2431 AC_FUNC_ATTR_READNONE
);
2434 LLVMValueRef
ac_build_imin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2437 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSLE
, a
, b
, "");
2438 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2441 LLVMValueRef
ac_build_imax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2444 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, a
, b
, "");
2445 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2448 LLVMValueRef
ac_build_umin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2451 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntULE
, a
, b
, "");
2452 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2455 LLVMValueRef
ac_build_umax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
2458 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntUGE
, a
, b
, "");
2459 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
2462 LLVMValueRef
ac_build_clamp(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
2464 LLVMTypeRef t
= LLVMTypeOf(value
);
2465 return ac_build_fmin(ctx
, ac_build_fmax(ctx
, value
, LLVMConstReal(t
, 0.0)),
2466 LLVMConstReal(t
, 1.0));
2469 void ac_build_export(struct ac_llvm_context
*ctx
, struct ac_export_args
*a
)
2471 LLVMValueRef args
[9];
2473 args
[0] = LLVMConstInt(ctx
->i32
, a
->target
, 0);
2474 args
[1] = LLVMConstInt(ctx
->i32
, a
->enabled_channels
, 0);
2477 LLVMTypeRef i16
= LLVMInt16TypeInContext(ctx
->context
);
2478 LLVMTypeRef v2i16
= LLVMVectorType(i16
, 2);
2480 args
[2] = LLVMBuildBitCast(ctx
->builder
, a
->out
[0],
2482 args
[3] = LLVMBuildBitCast(ctx
->builder
, a
->out
[1],
2484 args
[4] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2485 args
[5] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2487 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.compr.v2i16",
2488 ctx
->voidt
, args
, 6, 0);
2490 args
[2] = a
->out
[0];
2491 args
[3] = a
->out
[1];
2492 args
[4] = a
->out
[2];
2493 args
[5] = a
->out
[3];
2494 args
[6] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
2495 args
[7] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
2497 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.f32",
2498 ctx
->voidt
, args
, 8, 0);
2502 void ac_build_export_null(struct ac_llvm_context
*ctx
)
2504 struct ac_export_args args
;
2506 args
.enabled_channels
= 0x0; /* enabled channels */
2507 args
.valid_mask
= 1; /* whether the EXEC mask is valid */
2508 args
.done
= 1; /* DONE bit */
2509 args
.target
= V_008DFC_SQ_EXP_NULL
;
2510 args
.compr
= 0; /* COMPR flag (0 = 32-bit export) */
2511 args
.out
[0] = LLVMGetUndef(ctx
->f32
); /* R */
2512 args
.out
[1] = LLVMGetUndef(ctx
->f32
); /* G */
2513 args
.out
[2] = LLVMGetUndef(ctx
->f32
); /* B */
2514 args
.out
[3] = LLVMGetUndef(ctx
->f32
); /* A */
2516 ac_build_export(ctx
, &args
);
2519 static unsigned ac_num_coords(enum ac_image_dim dim
)
2525 case ac_image_1darray
:
2529 case ac_image_2darray
:
2530 case ac_image_2dmsaa
:
2532 case ac_image_2darraymsaa
:
2535 unreachable("ac_num_coords: bad dim");
2539 static unsigned ac_num_derivs(enum ac_image_dim dim
)
2543 case ac_image_1darray
:
2546 case ac_image_2darray
:
2551 case ac_image_2dmsaa
:
2552 case ac_image_2darraymsaa
:
2554 unreachable("derivatives not supported");
2558 static const char *get_atomic_name(enum ac_atomic_op op
)
2561 case ac_atomic_swap
: return "swap";
2562 case ac_atomic_add
: return "add";
2563 case ac_atomic_sub
: return "sub";
2564 case ac_atomic_smin
: return "smin";
2565 case ac_atomic_umin
: return "umin";
2566 case ac_atomic_smax
: return "smax";
2567 case ac_atomic_umax
: return "umax";
2568 case ac_atomic_and
: return "and";
2569 case ac_atomic_or
: return "or";
2570 case ac_atomic_xor
: return "xor";
2572 unreachable("bad atomic op");
2575 LLVMValueRef
ac_build_image_opcode(struct ac_llvm_context
*ctx
,
2576 struct ac_image_args
*a
)
2578 const char *overload
[3] = { "", "", "" };
2579 unsigned num_overloads
= 0;
2580 LLVMValueRef args
[18];
2581 unsigned num_args
= 0;
2582 enum ac_image_dim dim
= a
->dim
;
2584 assert(!a
->lod
|| a
->lod
== ctx
->i32_0
|| a
->lod
== ctx
->f32_0
||
2586 assert((a
->opcode
!= ac_image_get_resinfo
&& a
->opcode
!= ac_image_load_mip
&&
2587 a
->opcode
!= ac_image_store_mip
) ||
2589 assert(a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2590 (!a
->compare
&& !a
->offset
));
2591 assert((a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
2592 a
->opcode
== ac_image_get_lod
) ||
2594 assert((a
->bias
? 1 : 0) +
2596 (a
->level_zero
? 1 : 0) +
2597 (a
->derivs
[0] ? 1 : 0) <= 1);
2599 if (a
->opcode
== ac_image_get_lod
) {
2601 case ac_image_1darray
:
2604 case ac_image_2darray
:
2613 bool sample
= a
->opcode
== ac_image_sample
||
2614 a
->opcode
== ac_image_gather4
||
2615 a
->opcode
== ac_image_get_lod
;
2616 bool atomic
= a
->opcode
== ac_image_atomic
||
2617 a
->opcode
== ac_image_atomic_cmpswap
;
2618 bool load
= a
->opcode
== ac_image_sample
||
2619 a
->opcode
== ac_image_gather4
||
2620 a
->opcode
== ac_image_load
||
2621 a
->opcode
== ac_image_load_mip
;
2622 LLVMTypeRef coord_type
= sample
? ctx
->f32
: ctx
->i32
;
2624 if (atomic
|| a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
) {
2625 args
[num_args
++] = a
->data
[0];
2626 if (a
->opcode
== ac_image_atomic_cmpswap
)
2627 args
[num_args
++] = a
->data
[1];
2631 args
[num_args
++] = LLVMConstInt(ctx
->i32
, a
->dmask
, false);
2634 args
[num_args
++] = ac_to_integer(ctx
, a
->offset
);
2636 args
[num_args
++] = ac_to_float(ctx
, a
->bias
);
2637 overload
[num_overloads
++] = ".f32";
2640 args
[num_args
++] = ac_to_float(ctx
, a
->compare
);
2642 unsigned count
= ac_num_derivs(dim
);
2643 for (unsigned i
= 0; i
< count
; ++i
)
2644 args
[num_args
++] = ac_to_float(ctx
, a
->derivs
[i
]);
2645 overload
[num_overloads
++] = ".f32";
2647 unsigned num_coords
=
2648 a
->opcode
!= ac_image_get_resinfo
? ac_num_coords(dim
) : 0;
2649 for (unsigned i
= 0; i
< num_coords
; ++i
)
2650 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->coords
[i
], coord_type
, "");
2652 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->lod
, coord_type
, "");
2653 overload
[num_overloads
++] = sample
? ".f32" : ".i32";
2655 args
[num_args
++] = a
->resource
;
2657 args
[num_args
++] = a
->sampler
;
2658 args
[num_args
++] = LLVMConstInt(ctx
->i1
, a
->unorm
, false);
2661 args
[num_args
++] = ctx
->i32_0
; /* texfailctrl */
2662 args
[num_args
++] = LLVMConstInt(ctx
->i32
,
2663 load
? get_load_cache_policy(ctx
, a
->cache_policy
) :
2664 a
->cache_policy
, false);
2667 const char *atomic_subop
= "";
2668 switch (a
->opcode
) {
2669 case ac_image_sample
: name
= "sample"; break;
2670 case ac_image_gather4
: name
= "gather4"; break;
2671 case ac_image_load
: name
= "load"; break;
2672 case ac_image_load_mip
: name
= "load.mip"; break;
2673 case ac_image_store
: name
= "store"; break;
2674 case ac_image_store_mip
: name
= "store.mip"; break;
2675 case ac_image_atomic
:
2677 atomic_subop
= get_atomic_name(a
->atomic
);
2679 case ac_image_atomic_cmpswap
:
2681 atomic_subop
= "cmpswap";
2683 case ac_image_get_lod
: name
= "getlod"; break;
2684 case ac_image_get_resinfo
: name
= "getresinfo"; break;
2685 default: unreachable("invalid image opcode");
2688 const char *dimname
;
2690 case ac_image_1d
: dimname
= "1d"; break;
2691 case ac_image_2d
: dimname
= "2d"; break;
2692 case ac_image_3d
: dimname
= "3d"; break;
2693 case ac_image_cube
: dimname
= "cube"; break;
2694 case ac_image_1darray
: dimname
= "1darray"; break;
2695 case ac_image_2darray
: dimname
= "2darray"; break;
2696 case ac_image_2dmsaa
: dimname
= "2dmsaa"; break;
2697 case ac_image_2darraymsaa
: dimname
= "2darraymsaa"; break;
2698 default: unreachable("invalid dim");
2702 a
->lod
&& (a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
);
2704 snprintf(intr_name
, sizeof(intr_name
),
2705 "llvm.amdgcn.image.%s%s" /* base name */
2706 "%s%s%s" /* sample/gather modifiers */
2707 ".%s.%s%s%s%s", /* dimension and type overloads */
2709 a
->compare
? ".c" : "",
2712 a
->derivs
[0] ? ".d" :
2713 a
->level_zero
? ".lz" : "",
2714 a
->offset
? ".o" : "",
2716 atomic
? "i32" : "v4f32",
2717 overload
[0], overload
[1], overload
[2]);
2722 else if (a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
)
2727 LLVMValueRef result
=
2728 ac_build_intrinsic(ctx
, intr_name
, retty
, args
, num_args
,
2730 if (!sample
&& retty
== ctx
->v4f32
) {
2731 result
= LLVMBuildBitCast(ctx
->builder
, result
,
2737 LLVMValueRef
ac_build_cvt_pkrtz_f16(struct ac_llvm_context
*ctx
,
2738 LLVMValueRef args
[2])
2741 LLVMVectorType(LLVMHalfTypeInContext(ctx
->context
), 2);
2743 return ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pkrtz", v2f16
,
2744 args
, 2, AC_FUNC_ATTR_READNONE
);
2747 LLVMValueRef
ac_build_cvt_pknorm_i16(struct ac_llvm_context
*ctx
,
2748 LLVMValueRef args
[2])
2751 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.i16",
2752 ctx
->v2i16
, args
, 2,
2753 AC_FUNC_ATTR_READNONE
);
2754 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2757 LLVMValueRef
ac_build_cvt_pknorm_u16(struct ac_llvm_context
*ctx
,
2758 LLVMValueRef args
[2])
2761 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.u16",
2762 ctx
->v2i16
, args
, 2,
2763 AC_FUNC_ATTR_READNONE
);
2764 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2767 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2768 LLVMValueRef
ac_build_cvt_pk_i16(struct ac_llvm_context
*ctx
,
2769 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2771 assert(bits
== 8 || bits
== 10 || bits
== 16);
2773 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2774 bits
== 8 ? 127 : bits
== 10 ? 511 : 32767, 0);
2775 LLVMValueRef min_rgb
= LLVMConstInt(ctx
->i32
,
2776 bits
== 8 ? -128 : bits
== 10 ? -512 : -32768, 0);
2777 LLVMValueRef max_alpha
=
2778 bits
!= 10 ? max_rgb
: ctx
->i32_1
;
2779 LLVMValueRef min_alpha
=
2780 bits
!= 10 ? min_rgb
: LLVMConstInt(ctx
->i32
, -2, 0);
2784 for (int i
= 0; i
< 2; i
++) {
2785 bool alpha
= hi
&& i
== 1;
2786 args
[i
] = ac_build_imin(ctx
, args
[i
],
2787 alpha
? max_alpha
: max_rgb
);
2788 args
[i
] = ac_build_imax(ctx
, args
[i
],
2789 alpha
? min_alpha
: min_rgb
);
2794 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.i16",
2795 ctx
->v2i16
, args
, 2,
2796 AC_FUNC_ATTR_READNONE
);
2797 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2800 /* The 8-bit and 10-bit clamping is for HW workarounds. */
2801 LLVMValueRef
ac_build_cvt_pk_u16(struct ac_llvm_context
*ctx
,
2802 LLVMValueRef args
[2], unsigned bits
, bool hi
)
2804 assert(bits
== 8 || bits
== 10 || bits
== 16);
2806 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
2807 bits
== 8 ? 255 : bits
== 10 ? 1023 : 65535, 0);
2808 LLVMValueRef max_alpha
=
2809 bits
!= 10 ? max_rgb
: LLVMConstInt(ctx
->i32
, 3, 0);
2813 for (int i
= 0; i
< 2; i
++) {
2814 bool alpha
= hi
&& i
== 1;
2815 args
[i
] = ac_build_umin(ctx
, args
[i
],
2816 alpha
? max_alpha
: max_rgb
);
2821 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.u16",
2822 ctx
->v2i16
, args
, 2,
2823 AC_FUNC_ATTR_READNONE
);
2824 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2827 LLVMValueRef
ac_build_wqm_vote(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2829 return ac_build_intrinsic(ctx
, "llvm.amdgcn.wqm.vote", ctx
->i1
,
2830 &i1
, 1, AC_FUNC_ATTR_READNONE
);
2833 void ac_build_kill_if_false(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2835 ac_build_intrinsic(ctx
, "llvm.amdgcn.kill", ctx
->voidt
,
2839 LLVMValueRef
ac_build_bfe(struct ac_llvm_context
*ctx
, LLVMValueRef input
,
2840 LLVMValueRef offset
, LLVMValueRef width
,
2843 LLVMValueRef args
[] = {
2849 LLVMValueRef result
= ac_build_intrinsic(ctx
,
2850 is_signed
? "llvm.amdgcn.sbfe.i32" :
2851 "llvm.amdgcn.ubfe.i32",
2853 AC_FUNC_ATTR_READNONE
);
2855 if (HAVE_LLVM
< 0x0800) {
2856 /* FIXME: LLVM 7+ returns incorrect result when count is 0.
2857 * https://bugs.freedesktop.org/show_bug.cgi?id=107276
2859 LLVMValueRef zero
= ctx
->i32_0
;
2860 LLVMValueRef icond
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, width
, zero
, "");
2861 result
= LLVMBuildSelect(ctx
->builder
, icond
, zero
, result
, "");
2867 LLVMValueRef
ac_build_imad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2868 LLVMValueRef s1
, LLVMValueRef s2
)
2870 return LLVMBuildAdd(ctx
->builder
,
2871 LLVMBuildMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2874 LLVMValueRef
ac_build_fmad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2875 LLVMValueRef s1
, LLVMValueRef s2
)
2877 return LLVMBuildFAdd(ctx
->builder
,
2878 LLVMBuildFMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2881 void ac_build_waitcnt(struct ac_llvm_context
*ctx
, unsigned wait_flags
)
2886 unsigned lgkmcnt
= 63;
2887 unsigned vmcnt
= ctx
->chip_class
>= GFX9
? 63 : 15;
2888 unsigned vscnt
= 63;
2890 if (wait_flags
& AC_WAIT_LGKM
)
2892 if (wait_flags
& AC_WAIT_VLOAD
)
2895 if (wait_flags
& AC_WAIT_VSTORE
) {
2896 if (ctx
->chip_class
>= GFX10
)
2902 /* There is no intrinsic for vscnt(0), so use a fence. */
2903 if ((wait_flags
& AC_WAIT_LGKM
&&
2904 wait_flags
& AC_WAIT_VLOAD
&&
2905 wait_flags
& AC_WAIT_VSTORE
) ||
2907 LLVMBuildFence(ctx
->builder
, LLVMAtomicOrderingRelease
, false, "");
2911 unsigned simm16
= (lgkmcnt
<< 8) |
2912 (7 << 4) | /* expcnt */
2914 ((vmcnt
>> 4) << 14);
2916 LLVMValueRef args
[1] = {
2917 LLVMConstInt(ctx
->i32
, simm16
, false),
2919 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.waitcnt",
2920 ctx
->voidt
, args
, 1, 0);
2923 LLVMValueRef
ac_build_fmed3(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2924 LLVMValueRef src1
, LLVMValueRef src2
,
2930 if (bitsize
== 16) {
2931 intr
= "llvm.amdgcn.fmed3.f16";
2933 } else if (bitsize
== 32) {
2934 intr
= "llvm.amdgcn.fmed3.f32";
2937 intr
= "llvm.amdgcn.fmed3.f64";
2941 LLVMValueRef params
[] = {
2946 return ac_build_intrinsic(ctx
, intr
, type
, params
, 3,
2947 AC_FUNC_ATTR_READNONE
);
2950 LLVMValueRef
ac_build_fract(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2956 if (bitsize
== 16) {
2957 intr
= "llvm.amdgcn.fract.f16";
2959 } else if (bitsize
== 32) {
2960 intr
= "llvm.amdgcn.fract.f32";
2963 intr
= "llvm.amdgcn.fract.f64";
2967 LLVMValueRef params
[] = {
2970 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
2971 AC_FUNC_ATTR_READNONE
);
2974 LLVMValueRef
ac_build_isign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2977 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->context
, bitsize
);
2978 LLVMValueRef zero
= LLVMConstInt(type
, 0, false);
2979 LLVMValueRef one
= LLVMConstInt(type
, 1, false);
2981 LLVMValueRef cmp
, val
;
2982 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, src0
, zero
, "");
2983 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2984 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGE
, val
, zero
, "");
2985 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstInt(type
, -1, true), "");
2989 LLVMValueRef
ac_build_fsign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2992 LLVMValueRef cmp
, val
, zero
, one
;
2995 if (bitsize
== 16) {
2999 } else if (bitsize
== 32) {
3009 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGT
, src0
, zero
, "");
3010 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
3011 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGE
, val
, zero
, "");
3012 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstReal(type
, -1.0), "");
3016 LLVMValueRef
ac_build_bit_count(struct ac_llvm_context
*ctx
, LLVMValueRef src0
)
3018 LLVMValueRef result
;
3021 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
3025 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i64", ctx
->i64
,
3026 (LLVMValueRef
[]) { src0
}, 1,
3027 AC_FUNC_ATTR_READNONE
);
3029 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
3032 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i32", ctx
->i32
,
3033 (LLVMValueRef
[]) { src0
}, 1,
3034 AC_FUNC_ATTR_READNONE
);
3037 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i16", ctx
->i16
,
3038 (LLVMValueRef
[]) { src0
}, 1,
3039 AC_FUNC_ATTR_READNONE
);
3041 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
3044 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i8", ctx
->i8
,
3045 (LLVMValueRef
[]) { src0
}, 1,
3046 AC_FUNC_ATTR_READNONE
);
3048 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
3051 unreachable(!"invalid bitsize");
3058 LLVMValueRef
ac_build_bitfield_reverse(struct ac_llvm_context
*ctx
,
3061 LLVMValueRef result
;
3064 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
3068 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i64", ctx
->i64
,
3069 (LLVMValueRef
[]) { src0
}, 1,
3070 AC_FUNC_ATTR_READNONE
);
3072 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
3075 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i32", ctx
->i32
,
3076 (LLVMValueRef
[]) { src0
}, 1,
3077 AC_FUNC_ATTR_READNONE
);
3080 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i16", ctx
->i16
,
3081 (LLVMValueRef
[]) { src0
}, 1,
3082 AC_FUNC_ATTR_READNONE
);
3084 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
3087 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i8", ctx
->i8
,
3088 (LLVMValueRef
[]) { src0
}, 1,
3089 AC_FUNC_ATTR_READNONE
);
3091 result
= LLVMBuildZExt(ctx
->builder
, result
, ctx
->i32
, "");
3094 unreachable(!"invalid bitsize");
3101 #define AC_EXP_TARGET 0
3102 #define AC_EXP_ENABLED_CHANNELS 1
3103 #define AC_EXP_OUT0 2
3111 struct ac_vs_exp_chan
3115 enum ac_ir_type type
;
3118 struct ac_vs_exp_inst
{
3121 struct ac_vs_exp_chan chan
[4];
3124 struct ac_vs_exports
{
3126 struct ac_vs_exp_inst exp
[VARYING_SLOT_MAX
];
3129 /* Return true if the PARAM export has been eliminated. */
3130 static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset
,
3131 uint32_t num_outputs
,
3132 struct ac_vs_exp_inst
*exp
)
3134 unsigned i
, default_val
; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */
3135 bool is_zero
[4] = {}, is_one
[4] = {};
3137 for (i
= 0; i
< 4; i
++) {
3138 /* It's a constant expression. Undef outputs are eliminated too. */
3139 if (exp
->chan
[i
].type
== AC_IR_UNDEF
) {
3142 } else if (exp
->chan
[i
].type
== AC_IR_CONST
) {
3143 if (exp
->chan
[i
].const_float
== 0)
3145 else if (exp
->chan
[i
].const_float
== 1)
3148 return false; /* other constant */
3153 /* Only certain combinations of 0 and 1 can be eliminated. */
3154 if (is_zero
[0] && is_zero
[1] && is_zero
[2])
3155 default_val
= is_zero
[3] ? 0 : 1;
3156 else if (is_one
[0] && is_one
[1] && is_one
[2])
3157 default_val
= is_zero
[3] ? 2 : 3;
3161 /* The PARAM export can be represented as DEFAULT_VAL. Kill it. */
3162 LLVMInstructionEraseFromParent(exp
->inst
);
3164 /* Change OFFSET to DEFAULT_VAL. */
3165 for (i
= 0; i
< num_outputs
; i
++) {
3166 if (vs_output_param_offset
[i
] == exp
->offset
) {
3167 vs_output_param_offset
[i
] =
3168 AC_EXP_PARAM_DEFAULT_VAL_0000
+ default_val
;
3175 static bool ac_eliminate_duplicated_output(struct ac_llvm_context
*ctx
,
3176 uint8_t *vs_output_param_offset
,
3177 uint32_t num_outputs
,
3178 struct ac_vs_exports
*processed
,
3179 struct ac_vs_exp_inst
*exp
)
3181 unsigned p
, copy_back_channels
= 0;
3183 /* See if the output is already in the list of processed outputs.
3184 * The LLVMValueRef comparison relies on SSA.
3186 for (p
= 0; p
< processed
->num
; p
++) {
3187 bool different
= false;
3189 for (unsigned j
= 0; j
< 4; j
++) {
3190 struct ac_vs_exp_chan
*c1
= &processed
->exp
[p
].chan
[j
];
3191 struct ac_vs_exp_chan
*c2
= &exp
->chan
[j
];
3193 /* Treat undef as a match. */
3194 if (c2
->type
== AC_IR_UNDEF
)
3197 /* If c1 is undef but c2 isn't, we can copy c2 to c1
3198 * and consider the instruction duplicated.
3200 if (c1
->type
== AC_IR_UNDEF
) {
3201 copy_back_channels
|= 1 << j
;
3205 /* Test whether the channels are not equal. */
3206 if (c1
->type
!= c2
->type
||
3207 (c1
->type
== AC_IR_CONST
&&
3208 c1
->const_float
!= c2
->const_float
) ||
3209 (c1
->type
== AC_IR_VALUE
&&
3210 c1
->value
!= c2
->value
)) {
3218 copy_back_channels
= 0;
3220 if (p
== processed
->num
)
3223 /* If a match was found, but the matching export has undef where the new
3224 * one has a normal value, copy the normal value to the undef channel.
3226 struct ac_vs_exp_inst
*match
= &processed
->exp
[p
];
3228 /* Get current enabled channels mask. */
3229 LLVMValueRef arg
= LLVMGetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
);
3230 unsigned enabled_channels
= LLVMConstIntGetZExtValue(arg
);
3232 while (copy_back_channels
) {
3233 unsigned chan
= u_bit_scan(©_back_channels
);
3235 assert(match
->chan
[chan
].type
== AC_IR_UNDEF
);
3236 LLVMSetOperand(match
->inst
, AC_EXP_OUT0
+ chan
,
3237 exp
->chan
[chan
].value
);
3238 match
->chan
[chan
] = exp
->chan
[chan
];
3240 /* Update number of enabled channels because the original mask
3241 * is not always 0xf.
3243 enabled_channels
|= (1 << chan
);
3244 LLVMSetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
,
3245 LLVMConstInt(ctx
->i32
, enabled_channels
, 0));
3248 /* The PARAM export is duplicated. Kill it. */
3249 LLVMInstructionEraseFromParent(exp
->inst
);
3251 /* Change OFFSET to the matching export. */
3252 for (unsigned i
= 0; i
< num_outputs
; i
++) {
3253 if (vs_output_param_offset
[i
] == exp
->offset
) {
3254 vs_output_param_offset
[i
] = match
->offset
;
3261 void ac_optimize_vs_outputs(struct ac_llvm_context
*ctx
,
3262 LLVMValueRef main_fn
,
3263 uint8_t *vs_output_param_offset
,
3264 uint32_t num_outputs
,
3265 uint8_t *num_param_exports
)
3267 LLVMBasicBlockRef bb
;
3268 bool removed_any
= false;
3269 struct ac_vs_exports exports
;
3273 /* Process all LLVM instructions. */
3274 bb
= LLVMGetFirstBasicBlock(main_fn
);
3276 LLVMValueRef inst
= LLVMGetFirstInstruction(bb
);
3279 LLVMValueRef cur
= inst
;
3280 inst
= LLVMGetNextInstruction(inst
);
3281 struct ac_vs_exp_inst exp
;
3283 if (LLVMGetInstructionOpcode(cur
) != LLVMCall
)
3286 LLVMValueRef callee
= ac_llvm_get_called_value(cur
);
3288 if (!ac_llvm_is_function(callee
))
3291 const char *name
= LLVMGetValueName(callee
);
3292 unsigned num_args
= LLVMCountParams(callee
);
3294 /* Check if this is an export instruction. */
3295 if ((num_args
!= 9 && num_args
!= 8) ||
3296 (strcmp(name
, "llvm.SI.export") &&
3297 strcmp(name
, "llvm.amdgcn.exp.f32")))
3300 LLVMValueRef arg
= LLVMGetOperand(cur
, AC_EXP_TARGET
);
3301 unsigned target
= LLVMConstIntGetZExtValue(arg
);
3303 if (target
< V_008DFC_SQ_EXP_PARAM
)
3306 target
-= V_008DFC_SQ_EXP_PARAM
;
3308 /* Parse the instruction. */
3309 memset(&exp
, 0, sizeof(exp
));
3310 exp
.offset
= target
;
3313 for (unsigned i
= 0; i
< 4; i
++) {
3314 LLVMValueRef v
= LLVMGetOperand(cur
, AC_EXP_OUT0
+ i
);
3316 exp
.chan
[i
].value
= v
;
3318 if (LLVMIsUndef(v
)) {
3319 exp
.chan
[i
].type
= AC_IR_UNDEF
;
3320 } else if (LLVMIsAConstantFP(v
)) {
3321 LLVMBool loses_info
;
3322 exp
.chan
[i
].type
= AC_IR_CONST
;
3323 exp
.chan
[i
].const_float
=
3324 LLVMConstRealGetDouble(v
, &loses_info
);
3326 exp
.chan
[i
].type
= AC_IR_VALUE
;
3330 /* Eliminate constant and duplicated PARAM exports. */
3331 if (ac_eliminate_const_output(vs_output_param_offset
,
3332 num_outputs
, &exp
) ||
3333 ac_eliminate_duplicated_output(ctx
,
3334 vs_output_param_offset
,
3335 num_outputs
, &exports
,
3339 exports
.exp
[exports
.num
++] = exp
;
3342 bb
= LLVMGetNextBasicBlock(bb
);
3345 /* Remove holes in export memory due to removed PARAM exports.
3346 * This is done by renumbering all PARAM exports.
3349 uint8_t old_offset
[VARYING_SLOT_MAX
];
3352 /* Make a copy of the offsets. We need the old version while
3353 * we are modifying some of them. */
3354 memcpy(old_offset
, vs_output_param_offset
,
3355 sizeof(old_offset
));
3357 for (i
= 0; i
< exports
.num
; i
++) {
3358 unsigned offset
= exports
.exp
[i
].offset
;
3360 /* Update vs_output_param_offset. Multiple outputs can
3361 * have the same offset.
3363 for (out
= 0; out
< num_outputs
; out
++) {
3364 if (old_offset
[out
] == offset
)
3365 vs_output_param_offset
[out
] = i
;
3368 /* Change the PARAM offset in the instruction. */
3369 LLVMSetOperand(exports
.exp
[i
].inst
, AC_EXP_TARGET
,
3370 LLVMConstInt(ctx
->i32
,
3371 V_008DFC_SQ_EXP_PARAM
+ i
, 0));
3373 *num_param_exports
= exports
.num
;
3377 void ac_init_exec_full_mask(struct ac_llvm_context
*ctx
)
3379 LLVMValueRef full_mask
= LLVMConstInt(ctx
->i64
, ~0ull, 0);
3380 ac_build_intrinsic(ctx
,
3381 "llvm.amdgcn.init.exec", ctx
->voidt
,
3382 &full_mask
, 1, AC_FUNC_ATTR_CONVERGENT
);
3385 void ac_declare_lds_as_pointer(struct ac_llvm_context
*ctx
)
3387 unsigned lds_size
= ctx
->chip_class
>= GFX7
? 65536 : 32768;
3388 ctx
->lds
= LLVMBuildIntToPtr(ctx
->builder
, ctx
->i32_0
,
3389 LLVMPointerType(LLVMArrayType(ctx
->i32
, lds_size
/ 4), AC_ADDR_SPACE_LDS
),
3393 LLVMValueRef
ac_lds_load(struct ac_llvm_context
*ctx
,
3394 LLVMValueRef dw_addr
)
3396 return LLVMBuildLoad(ctx
->builder
, ac_build_gep0(ctx
, ctx
->lds
, dw_addr
), "");
3399 void ac_lds_store(struct ac_llvm_context
*ctx
,
3400 LLVMValueRef dw_addr
,
3403 value
= ac_to_integer(ctx
, value
);
3404 ac_build_indexed_store(ctx
, ctx
->lds
,
3408 LLVMValueRef
ac_find_lsb(struct ac_llvm_context
*ctx
,
3409 LLVMTypeRef dst_type
,
3412 unsigned src0_bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
3413 const char *intrin_name
;
3417 switch (src0_bitsize
) {
3419 intrin_name
= "llvm.cttz.i64";
3424 intrin_name
= "llvm.cttz.i32";
3429 intrin_name
= "llvm.cttz.i16";
3434 intrin_name
= "llvm.cttz.i8";
3439 unreachable(!"invalid bitsize");
3442 LLVMValueRef params
[2] = {
3445 /* The value of 1 means that ffs(x=0) = undef, so LLVM won't
3446 * add special code to check for x=0. The reason is that
3447 * the LLVM behavior for x=0 is different from what we
3448 * need here. However, LLVM also assumes that ffs(x) is
3449 * in [0, 31], but GLSL expects that ffs(0) = -1, so
3450 * a conditional assignment to handle 0 is still required.
3452 * The hardware already implements the correct behavior.
3457 LLVMValueRef lsb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
3459 AC_FUNC_ATTR_READNONE
);
3461 if (src0_bitsize
== 64) {
3462 lsb
= LLVMBuildTrunc(ctx
->builder
, lsb
, ctx
->i32
, "");
3463 } else if (src0_bitsize
< 32) {
3464 lsb
= LLVMBuildSExt(ctx
->builder
, lsb
, ctx
->i32
, "");
3467 /* TODO: We need an intrinsic to skip this conditional. */
3468 /* Check for zero: */
3469 return LLVMBuildSelect(ctx
->builder
, LLVMBuildICmp(ctx
->builder
,
3472 LLVMConstInt(ctx
->i32
, -1, 0), lsb
, "");
3475 LLVMTypeRef
ac_array_in_const_addr_space(LLVMTypeRef elem_type
)
3477 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST
);
3480 LLVMTypeRef
ac_array_in_const32_addr_space(LLVMTypeRef elem_type
)
3482 return LLVMPointerType(elem_type
, AC_ADDR_SPACE_CONST_32BIT
);
3485 static struct ac_llvm_flow
*
3486 get_current_flow(struct ac_llvm_context
*ctx
)
3488 if (ctx
->flow_depth
> 0)
3489 return &ctx
->flow
[ctx
->flow_depth
- 1];
3493 static struct ac_llvm_flow
*
3494 get_innermost_loop(struct ac_llvm_context
*ctx
)
3496 for (unsigned i
= ctx
->flow_depth
; i
> 0; --i
) {
3497 if (ctx
->flow
[i
- 1].loop_entry_block
)
3498 return &ctx
->flow
[i
- 1];
3503 static struct ac_llvm_flow
*
3504 push_flow(struct ac_llvm_context
*ctx
)
3506 struct ac_llvm_flow
*flow
;
3508 if (ctx
->flow_depth
>= ctx
->flow_depth_max
) {
3509 unsigned new_max
= MAX2(ctx
->flow_depth
<< 1,
3510 AC_LLVM_INITIAL_CF_DEPTH
);
3512 ctx
->flow
= realloc(ctx
->flow
, new_max
* sizeof(*ctx
->flow
));
3513 ctx
->flow_depth_max
= new_max
;
3516 flow
= &ctx
->flow
[ctx
->flow_depth
];
3519 flow
->next_block
= NULL
;
3520 flow
->loop_entry_block
= NULL
;
3524 static void set_basicblock_name(LLVMBasicBlockRef bb
, const char *base
,
3528 snprintf(buf
, sizeof(buf
), "%s%d", base
, label_id
);
3529 LLVMSetValueName(LLVMBasicBlockAsValue(bb
), buf
);
3532 /* Append a basic block at the level of the parent flow.
3534 static LLVMBasicBlockRef
append_basic_block(struct ac_llvm_context
*ctx
,
3537 assert(ctx
->flow_depth
>= 1);
3539 if (ctx
->flow_depth
>= 2) {
3540 struct ac_llvm_flow
*flow
= &ctx
->flow
[ctx
->flow_depth
- 2];
3542 return LLVMInsertBasicBlockInContext(ctx
->context
,
3543 flow
->next_block
, name
);
3546 LLVMValueRef main_fn
=
3547 LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx
->builder
));
3548 return LLVMAppendBasicBlockInContext(ctx
->context
, main_fn
, name
);
3551 /* Emit a branch to the given default target for the current block if
3552 * applicable -- that is, if the current block does not already contain a
3553 * branch from a break or continue.
3555 static void emit_default_branch(LLVMBuilderRef builder
,
3556 LLVMBasicBlockRef target
)
3558 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder
)))
3559 LLVMBuildBr(builder
, target
);
3562 void ac_build_bgnloop(struct ac_llvm_context
*ctx
, int label_id
)
3564 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3565 flow
->loop_entry_block
= append_basic_block(ctx
, "LOOP");
3566 flow
->next_block
= append_basic_block(ctx
, "ENDLOOP");
3567 set_basicblock_name(flow
->loop_entry_block
, "loop", label_id
);
3568 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3569 LLVMPositionBuilderAtEnd(ctx
->builder
, flow
->loop_entry_block
);
3572 void ac_build_break(struct ac_llvm_context
*ctx
)
3574 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3575 LLVMBuildBr(ctx
->builder
, flow
->next_block
);
3578 void ac_build_continue(struct ac_llvm_context
*ctx
)
3580 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
3581 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
3584 void ac_build_else(struct ac_llvm_context
*ctx
, int label_id
)
3586 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3587 LLVMBasicBlockRef endif_block
;
3589 assert(!current_branch
->loop_entry_block
);
3591 endif_block
= append_basic_block(ctx
, "ENDIF");
3592 emit_default_branch(ctx
->builder
, endif_block
);
3594 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3595 set_basicblock_name(current_branch
->next_block
, "else", label_id
);
3597 current_branch
->next_block
= endif_block
;
3600 void ac_build_endif(struct ac_llvm_context
*ctx
, int label_id
)
3602 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
3604 assert(!current_branch
->loop_entry_block
);
3606 emit_default_branch(ctx
->builder
, current_branch
->next_block
);
3607 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
3608 set_basicblock_name(current_branch
->next_block
, "endif", label_id
);
3613 void ac_build_endloop(struct ac_llvm_context
*ctx
, int label_id
)
3615 struct ac_llvm_flow
*current_loop
= get_current_flow(ctx
);
3617 assert(current_loop
->loop_entry_block
);
3619 emit_default_branch(ctx
->builder
, current_loop
->loop_entry_block
);
3621 LLVMPositionBuilderAtEnd(ctx
->builder
, current_loop
->next_block
);
3622 set_basicblock_name(current_loop
->next_block
, "endloop", label_id
);
3626 void ac_build_ifcc(struct ac_llvm_context
*ctx
, LLVMValueRef cond
, int label_id
)
3628 struct ac_llvm_flow
*flow
= push_flow(ctx
);
3629 LLVMBasicBlockRef if_block
;
3631 if_block
= append_basic_block(ctx
, "IF");
3632 flow
->next_block
= append_basic_block(ctx
, "ELSE");
3633 set_basicblock_name(if_block
, "if", label_id
);
3634 LLVMBuildCondBr(ctx
->builder
, cond
, if_block
, flow
->next_block
);
3635 LLVMPositionBuilderAtEnd(ctx
->builder
, if_block
);
3638 void ac_build_if(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3641 LLVMValueRef cond
= LLVMBuildFCmp(ctx
->builder
, LLVMRealUNE
,
3642 value
, ctx
->f32_0
, "");
3643 ac_build_ifcc(ctx
, cond
, label_id
);
3646 void ac_build_uif(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3649 LLVMValueRef cond
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
3650 ac_to_integer(ctx
, value
),
3652 ac_build_ifcc(ctx
, cond
, label_id
);
3655 LLVMValueRef
ac_build_alloca_undef(struct ac_llvm_context
*ac
, LLVMTypeRef type
,
3658 LLVMBuilderRef builder
= ac
->builder
;
3659 LLVMBasicBlockRef current_block
= LLVMGetInsertBlock(builder
);
3660 LLVMValueRef function
= LLVMGetBasicBlockParent(current_block
);
3661 LLVMBasicBlockRef first_block
= LLVMGetEntryBasicBlock(function
);
3662 LLVMValueRef first_instr
= LLVMGetFirstInstruction(first_block
);
3663 LLVMBuilderRef first_builder
= LLVMCreateBuilderInContext(ac
->context
);
3667 LLVMPositionBuilderBefore(first_builder
, first_instr
);
3669 LLVMPositionBuilderAtEnd(first_builder
, first_block
);
3672 res
= LLVMBuildAlloca(first_builder
, type
, name
);
3673 LLVMDisposeBuilder(first_builder
);
3677 LLVMValueRef
ac_build_alloca(struct ac_llvm_context
*ac
,
3678 LLVMTypeRef type
, const char *name
)
3680 LLVMValueRef ptr
= ac_build_alloca_undef(ac
, type
, name
);
3681 LLVMBuildStore(ac
->builder
, LLVMConstNull(type
), ptr
);
3685 LLVMValueRef
ac_cast_ptr(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
3688 int addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
3689 return LLVMBuildBitCast(ctx
->builder
, ptr
,
3690 LLVMPointerType(type
, addr_space
), "");
3693 LLVMValueRef
ac_trim_vector(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
3696 unsigned num_components
= ac_get_llvm_num_components(value
);
3697 if (count
== num_components
)
3700 LLVMValueRef masks
[MAX2(count
, 2)];
3701 masks
[0] = ctx
->i32_0
;
3702 masks
[1] = ctx
->i32_1
;
3703 for (unsigned i
= 2; i
< count
; i
++)
3704 masks
[i
] = LLVMConstInt(ctx
->i32
, i
, false);
3707 return LLVMBuildExtractElement(ctx
->builder
, value
, masks
[0],
3710 LLVMValueRef swizzle
= LLVMConstVector(masks
, count
);
3711 return LLVMBuildShuffleVector(ctx
->builder
, value
, value
, swizzle
, "");
3714 LLVMValueRef
ac_unpack_param(struct ac_llvm_context
*ctx
, LLVMValueRef param
,
3715 unsigned rshift
, unsigned bitwidth
)
3717 LLVMValueRef value
= param
;
3719 value
= LLVMBuildLShr(ctx
->builder
, value
,
3720 LLVMConstInt(ctx
->i32
, rshift
, false), "");
3722 if (rshift
+ bitwidth
< 32) {
3723 unsigned mask
= (1 << bitwidth
) - 1;
3724 value
= LLVMBuildAnd(ctx
->builder
, value
,
3725 LLVMConstInt(ctx
->i32
, mask
, false), "");
3730 /* Adjust the sample index according to FMASK.
3732 * For uncompressed MSAA surfaces, FMASK should return 0x76543210,
3733 * which is the identity mapping. Each nibble says which physical sample
3734 * should be fetched to get that sample.
3736 * For example, 0x11111100 means there are only 2 samples stored and
3737 * the second sample covers 3/4 of the pixel. When reading samples 0
3738 * and 1, return physical sample 0 (determined by the first two 0s
3739 * in FMASK), otherwise return physical sample 1.
3741 * The sample index should be adjusted as follows:
3742 * addr[sample_index] = (fmask >> (addr[sample_index] * 4)) & 0xF;
3744 void ac_apply_fmask_to_sample(struct ac_llvm_context
*ac
, LLVMValueRef fmask
,
3745 LLVMValueRef
*addr
, bool is_array_tex
)
3747 struct ac_image_args fmask_load
= {};
3748 fmask_load
.opcode
= ac_image_load
;
3749 fmask_load
.resource
= fmask
;
3750 fmask_load
.dmask
= 0xf;
3751 fmask_load
.dim
= is_array_tex
? ac_image_2darray
: ac_image_2d
;
3752 fmask_load
.attributes
= AC_FUNC_ATTR_READNONE
;
3754 fmask_load
.coords
[0] = addr
[0];
3755 fmask_load
.coords
[1] = addr
[1];
3757 fmask_load
.coords
[2] = addr
[2];
3759 LLVMValueRef fmask_value
= ac_build_image_opcode(ac
, &fmask_load
);
3760 fmask_value
= LLVMBuildExtractElement(ac
->builder
, fmask_value
,
3763 /* Apply the formula. */
3764 unsigned sample_chan
= is_array_tex
? 3 : 2;
3765 LLVMValueRef final_sample
;
3766 final_sample
= LLVMBuildMul(ac
->builder
, addr
[sample_chan
],
3767 LLVMConstInt(ac
->i32
, 4, 0), "");
3768 final_sample
= LLVMBuildLShr(ac
->builder
, fmask_value
, final_sample
, "");
3769 /* Mask the sample index by 0x7, because 0x8 means an unknown value
3770 * with EQAA, so those will map to 0. */
3771 final_sample
= LLVMBuildAnd(ac
->builder
, final_sample
,
3772 LLVMConstInt(ac
->i32
, 0x7, 0), "");
3774 /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK
3775 * resource descriptor is 0 (invalid).
3778 tmp
= LLVMBuildBitCast(ac
->builder
, fmask
, ac
->v8i32
, "");
3779 tmp
= LLVMBuildExtractElement(ac
->builder
, tmp
, ac
->i32_1
, "");
3780 tmp
= LLVMBuildICmp(ac
->builder
, LLVMIntNE
, tmp
, ac
->i32_0
, "");
3782 /* Replace the MSAA sample index. */
3783 addr
[sample_chan
] = LLVMBuildSelect(ac
->builder
, tmp
, final_sample
,
3784 addr
[sample_chan
], "");
3788 _ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
3790 ac_build_optimization_barrier(ctx
, &src
);
3791 return ac_build_intrinsic(ctx
,
3792 lane
== NULL
? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane",
3793 LLVMTypeOf(src
), (LLVMValueRef
[]) {
3795 lane
== NULL
? 1 : 2,
3796 AC_FUNC_ATTR_READNONE
|
3797 AC_FUNC_ATTR_CONVERGENT
);
3801 * Builds the "llvm.amdgcn.readlane" or "llvm.amdgcn.readfirstlane" intrinsic.
3804 * @param lane - id of the lane or NULL for the first active lane
3805 * @return value of the lane
3808 ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
3810 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3811 src
= ac_to_integer(ctx
, src
);
3812 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3816 ret
= _ac_build_readlane(ctx
, src
, lane
);
3818 assert(bits
% 32 == 0);
3819 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3820 LLVMValueRef src_vector
=
3821 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3822 ret
= LLVMGetUndef(vec_type
);
3823 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3824 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3825 LLVMConstInt(ctx
->i32
, i
, 0), "");
3826 LLVMValueRef ret_comp
= _ac_build_readlane(ctx
, src
, lane
);
3827 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
, ret_comp
,
3828 LLVMConstInt(ctx
->i32
, i
, 0), "");
3831 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3835 ac_build_writelane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef value
, LLVMValueRef lane
)
3837 if (HAVE_LLVM
>= 0x0800) {
3838 return ac_build_intrinsic(ctx
, "llvm.amdgcn.writelane", ctx
->i32
,
3839 (LLVMValueRef
[]) {value
, lane
, src
}, 3,
3840 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3843 LLVMValueRef pred
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, lane
,
3844 ac_get_thread_id(ctx
), "");
3845 return LLVMBuildSelect(ctx
->builder
, pred
, value
, src
, "");
3849 ac_build_mbcnt(struct ac_llvm_context
*ctx
, LLVMValueRef mask
)
3851 LLVMValueRef mask_vec
= LLVMBuildBitCast(ctx
->builder
, mask
,
3852 LLVMVectorType(ctx
->i32
, 2),
3854 LLVMValueRef mask_lo
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3856 LLVMValueRef mask_hi
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
3859 ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
3860 (LLVMValueRef
[]) { mask_lo
, ctx
->i32_0
},
3861 2, AC_FUNC_ATTR_READNONE
);
3862 val
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi", ctx
->i32
,
3863 (LLVMValueRef
[]) { mask_hi
, val
},
3864 2, AC_FUNC_ATTR_READNONE
);
3869 _dpp_quad_perm
= 0x000,
3870 _dpp_row_sl
= 0x100,
3871 _dpp_row_sr
= 0x110,
3872 _dpp_row_rr
= 0x120,
3877 dpp_row_mirror
= 0x140,
3878 dpp_row_half_mirror
= 0x141,
3879 dpp_row_bcast15
= 0x142,
3880 dpp_row_bcast31
= 0x143
3883 static inline enum dpp_ctrl
3884 dpp_quad_perm(unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
3886 assert(lane0
< 4 && lane1
< 4 && lane2
< 4 && lane3
< 4);
3887 return _dpp_quad_perm
| lane0
| (lane1
<< 2) | (lane2
<< 4) | (lane3
<< 6);
3890 static inline enum dpp_ctrl
3891 dpp_row_sl(unsigned amount
)
3893 assert(amount
> 0 && amount
< 16);
3894 return _dpp_row_sl
| amount
;
3897 static inline enum dpp_ctrl
3898 dpp_row_sr(unsigned amount
)
3900 assert(amount
> 0 && amount
< 16);
3901 return _dpp_row_sr
| amount
;
3905 _ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3906 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3909 return ac_build_intrinsic(ctx
, "llvm.amdgcn.update.dpp.i32",
3913 LLVMConstInt(ctx
->i32
, dpp_ctrl
, 0),
3914 LLVMConstInt(ctx
->i32
, row_mask
, 0),
3915 LLVMConstInt(ctx
->i32
, bank_mask
, 0),
3916 LLVMConstInt(ctx
->i1
, bound_ctrl
, 0) },
3917 6, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3921 ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
3922 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
3925 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3926 src
= ac_to_integer(ctx
, src
);
3927 old
= ac_to_integer(ctx
, old
);
3928 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3931 ret
= _ac_build_dpp(ctx
, old
, src
, dpp_ctrl
, row_mask
,
3932 bank_mask
, bound_ctrl
);
3934 assert(bits
% 32 == 0);
3935 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3936 LLVMValueRef src_vector
=
3937 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3938 LLVMValueRef old_vector
=
3939 LLVMBuildBitCast(ctx
->builder
, old
, vec_type
, "");
3940 ret
= LLVMGetUndef(vec_type
);
3941 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3942 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3943 LLVMConstInt(ctx
->i32
, i
,
3945 old
= LLVMBuildExtractElement(ctx
->builder
, old_vector
,
3946 LLVMConstInt(ctx
->i32
, i
,
3948 LLVMValueRef ret_comp
= _ac_build_dpp(ctx
, old
, src
,
3953 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3955 LLVMConstInt(ctx
->i32
, i
,
3959 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3963 _ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3964 bool exchange_rows
, bool bound_ctrl
)
3966 LLVMValueRef args
[6] = {
3969 LLVMConstInt(ctx
->i32
, sel
, false),
3970 LLVMConstInt(ctx
->i32
, sel
>> 32, false),
3971 ctx
->i1true
, /* fi */
3972 bound_ctrl
? ctx
->i1true
: ctx
->i1false
,
3974 return ac_build_intrinsic(ctx
, exchange_rows
? "llvm.amdgcn.permlanex16"
3975 : "llvm.amdgcn.permlane16",
3977 AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3981 ac_build_permlane16(struct ac_llvm_context
*ctx
, LLVMValueRef src
, uint64_t sel
,
3982 bool exchange_rows
, bool bound_ctrl
)
3984 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3985 src
= ac_to_integer(ctx
, src
);
3986 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3989 ret
= _ac_build_permlane16(ctx
, src
, sel
, exchange_rows
,
3992 assert(bits
% 32 == 0);
3993 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3994 LLVMValueRef src_vector
=
3995 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3996 ret
= LLVMGetUndef(vec_type
);
3997 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3998 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3999 LLVMConstInt(ctx
->i32
, i
,
4001 LLVMValueRef ret_comp
=
4002 _ac_build_permlane16(ctx
, src
, sel
,
4005 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
4007 LLVMConstInt(ctx
->i32
, i
,
4011 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
4014 static inline unsigned
4015 ds_pattern_bitmode(unsigned and_mask
, unsigned or_mask
, unsigned xor_mask
)
4017 assert(and_mask
< 32 && or_mask
< 32 && xor_mask
< 32);
4018 return and_mask
| (or_mask
<< 5) | (xor_mask
<< 10);
4022 _ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
4024 return ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.swizzle",
4025 LLVMTypeOf(src
), (LLVMValueRef
[]) {
4026 src
, LLVMConstInt(ctx
->i32
, mask
, 0) },
4027 2, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
4031 ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
4033 LLVMTypeRef src_type
= LLVMTypeOf(src
);
4034 src
= ac_to_integer(ctx
, src
);
4035 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
4038 ret
= _ac_build_ds_swizzle(ctx
, src
, mask
);
4040 assert(bits
% 32 == 0);
4041 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
4042 LLVMValueRef src_vector
=
4043 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
4044 ret
= LLVMGetUndef(vec_type
);
4045 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
4046 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
4047 LLVMConstInt(ctx
->i32
, i
,
4049 LLVMValueRef ret_comp
= _ac_build_ds_swizzle(ctx
, src
,
4051 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
4053 LLVMConstInt(ctx
->i32
, i
,
4057 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
4061 ac_build_wwm(struct ac_llvm_context
*ctx
, LLVMValueRef src
)
4063 char name
[32], type
[8];
4064 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
4065 snprintf(name
, sizeof(name
), "llvm.amdgcn.wwm.%s", type
);
4066 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(src
),
4067 (LLVMValueRef
[]) { src
}, 1,
4068 AC_FUNC_ATTR_READNONE
);
4072 ac_build_set_inactive(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4073 LLVMValueRef inactive
)
4075 char name
[33], type
[8];
4076 LLVMTypeRef src_type
= LLVMTypeOf(src
);
4077 src
= ac_to_integer(ctx
, src
);
4078 inactive
= ac_to_integer(ctx
, inactive
);
4079 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
4080 snprintf(name
, sizeof(name
), "llvm.amdgcn.set.inactive.%s", type
);
4082 ac_build_intrinsic(ctx
, name
,
4083 LLVMTypeOf(src
), (LLVMValueRef
[]) {
4085 AC_FUNC_ATTR_READNONE
|
4086 AC_FUNC_ATTR_CONVERGENT
);
4087 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
4091 get_reduction_identity(struct ac_llvm_context
*ctx
, nir_op op
, unsigned type_size
)
4093 if (type_size
== 4) {
4095 case nir_op_iadd
: return ctx
->i32_0
;
4096 case nir_op_fadd
: return ctx
->f32_0
;
4097 case nir_op_imul
: return ctx
->i32_1
;
4098 case nir_op_fmul
: return ctx
->f32_1
;
4099 case nir_op_imin
: return LLVMConstInt(ctx
->i32
, INT32_MAX
, 0);
4100 case nir_op_umin
: return LLVMConstInt(ctx
->i32
, UINT32_MAX
, 0);
4101 case nir_op_fmin
: return LLVMConstReal(ctx
->f32
, INFINITY
);
4102 case nir_op_imax
: return LLVMConstInt(ctx
->i32
, INT32_MIN
, 0);
4103 case nir_op_umax
: return ctx
->i32_0
;
4104 case nir_op_fmax
: return LLVMConstReal(ctx
->f32
, -INFINITY
);
4105 case nir_op_iand
: return LLVMConstInt(ctx
->i32
, -1, 0);
4106 case nir_op_ior
: return ctx
->i32_0
;
4107 case nir_op_ixor
: return ctx
->i32_0
;
4109 unreachable("bad reduction intrinsic");
4111 } else { /* type_size == 64bit */
4113 case nir_op_iadd
: return ctx
->i64_0
;
4114 case nir_op_fadd
: return ctx
->f64_0
;
4115 case nir_op_imul
: return ctx
->i64_1
;
4116 case nir_op_fmul
: return ctx
->f64_1
;
4117 case nir_op_imin
: return LLVMConstInt(ctx
->i64
, INT64_MAX
, 0);
4118 case nir_op_umin
: return LLVMConstInt(ctx
->i64
, UINT64_MAX
, 0);
4119 case nir_op_fmin
: return LLVMConstReal(ctx
->f64
, INFINITY
);
4120 case nir_op_imax
: return LLVMConstInt(ctx
->i64
, INT64_MIN
, 0);
4121 case nir_op_umax
: return ctx
->i64_0
;
4122 case nir_op_fmax
: return LLVMConstReal(ctx
->f64
, -INFINITY
);
4123 case nir_op_iand
: return LLVMConstInt(ctx
->i64
, -1, 0);
4124 case nir_op_ior
: return ctx
->i64_0
;
4125 case nir_op_ixor
: return ctx
->i64_0
;
4127 unreachable("bad reduction intrinsic");
4133 ac_build_alu_op(struct ac_llvm_context
*ctx
, LLVMValueRef lhs
, LLVMValueRef rhs
, nir_op op
)
4135 bool _64bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 8;
4137 case nir_op_iadd
: return LLVMBuildAdd(ctx
->builder
, lhs
, rhs
, "");
4138 case nir_op_fadd
: return LLVMBuildFAdd(ctx
->builder
, lhs
, rhs
, "");
4139 case nir_op_imul
: return LLVMBuildMul(ctx
->builder
, lhs
, rhs
, "");
4140 case nir_op_fmul
: return LLVMBuildFMul(ctx
->builder
, lhs
, rhs
, "");
4141 case nir_op_imin
: return LLVMBuildSelect(ctx
->builder
,
4142 LLVMBuildICmp(ctx
->builder
, LLVMIntSLT
, lhs
, rhs
, ""),
4144 case nir_op_umin
: return LLVMBuildSelect(ctx
->builder
,
4145 LLVMBuildICmp(ctx
->builder
, LLVMIntULT
, lhs
, rhs
, ""),
4147 case nir_op_fmin
: return ac_build_intrinsic(ctx
,
4148 _64bit
? "llvm.minnum.f64" : "llvm.minnum.f32",
4149 _64bit
? ctx
->f64
: ctx
->f32
,
4150 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4151 case nir_op_imax
: return LLVMBuildSelect(ctx
->builder
,
4152 LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, lhs
, rhs
, ""),
4154 case nir_op_umax
: return LLVMBuildSelect(ctx
->builder
,
4155 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, lhs
, rhs
, ""),
4157 case nir_op_fmax
: return ac_build_intrinsic(ctx
,
4158 _64bit
? "llvm.maxnum.f64" : "llvm.maxnum.f32",
4159 _64bit
? ctx
->f64
: ctx
->f32
,
4160 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
4161 case nir_op_iand
: return LLVMBuildAnd(ctx
->builder
, lhs
, rhs
, "");
4162 case nir_op_ior
: return LLVMBuildOr(ctx
->builder
, lhs
, rhs
, "");
4163 case nir_op_ixor
: return LLVMBuildXor(ctx
->builder
, lhs
, rhs
, "");
4165 unreachable("bad reduction intrinsic");
4170 * \param maxprefix specifies that the result only needs to be correct for a
4171 * prefix of this many threads
4173 * TODO: add inclusive and excluse scan functions for GFX6.
4176 ac_build_scan(struct ac_llvm_context
*ctx
, nir_op op
, LLVMValueRef src
, LLVMValueRef identity
,
4177 unsigned maxprefix
, bool inclusive
)
4179 LLVMValueRef result
, tmp
;
4181 if (ctx
->chip_class
>= GFX10
) {
4182 result
= inclusive
? src
: identity
;
4187 result
= ac_build_dpp(ctx
, identity
, src
, dpp_wf_sr1
, 0xf, 0xf, false);
4191 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
4192 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4195 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(2), 0xf, 0xf, false);
4196 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4199 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(3), 0xf, 0xf, false);
4200 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4203 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(4), 0xf, 0xe, false);
4204 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4207 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(8), 0xf, 0xc, false);
4208 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4209 if (maxprefix
<= 16)
4212 if (ctx
->chip_class
>= GFX10
) {
4213 /* dpp_row_bcast{15,31} are not supported on gfx10. */
4214 LLVMBuilderRef builder
= ctx
->builder
;
4215 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4217 /* TODO-GFX10: Can we get better code-gen by putting this into
4218 * a branch so that LLVM generates EXEC mask manipulations? */
4222 tmp
= ac_build_alu_op(ctx
, result
, src
, op
);
4223 tmp
= ac_build_permlane16(ctx
, tmp
, ~(uint64_t)0, true, false);
4224 tmp
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4225 cc
= LLVMBuildAnd(builder
, tid
, LLVMConstInt(ctx
->i32
, 16, false), "");
4226 cc
= LLVMBuildICmp(builder
, LLVMIntNE
, cc
, ctx
->i32_0
, "");
4227 result
= LLVMBuildSelect(builder
, cc
, tmp
, result
, "");
4228 if (maxprefix
<= 32)
4234 tmp
= ac_build_alu_op(ctx
, result
, src
, op
);
4235 tmp
= ac_build_readlane(ctx
, tmp
, LLVMConstInt(ctx
->i32
, 31, false));
4236 tmp
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4237 cc
= LLVMBuildICmp(builder
, LLVMIntUGE
, tid
,
4238 LLVMConstInt(ctx
->i32
, 32, false), "");
4239 result
= LLVMBuildSelect(builder
, cc
, tmp
, result
, "");
4243 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4244 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4245 if (maxprefix
<= 32)
4247 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4248 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
4253 ac_build_inclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4255 LLVMValueRef result
;
4257 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4258 LLVMBuilderRef builder
= ctx
->builder
;
4259 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4260 result
= ac_build_ballot(ctx
, src
);
4261 result
= ac_build_mbcnt(ctx
, result
);
4262 result
= LLVMBuildAdd(builder
, result
, src
, "");
4266 ac_build_optimization_barrier(ctx
, &src
);
4268 LLVMValueRef identity
=
4269 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4270 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4271 LLVMTypeOf(identity
), "");
4272 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, true);
4274 return ac_build_wwm(ctx
, result
);
4278 ac_build_exclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
4280 LLVMValueRef result
;
4282 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
4283 LLVMBuilderRef builder
= ctx
->builder
;
4284 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
4285 result
= ac_build_ballot(ctx
, src
);
4286 result
= ac_build_mbcnt(ctx
, result
);
4290 ac_build_optimization_barrier(ctx
, &src
);
4292 LLVMValueRef identity
=
4293 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
4294 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
4295 LLVMTypeOf(identity
), "");
4296 result
= ac_build_scan(ctx
, op
, result
, identity
, ctx
->wave_size
, false);
4298 return ac_build_wwm(ctx
, result
);
4302 ac_build_reduce(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
, unsigned cluster_size
)
4304 if (cluster_size
== 1) return src
;
4305 ac_build_optimization_barrier(ctx
, &src
);
4306 LLVMValueRef result
, swap
;
4307 LLVMValueRef identity
= get_reduction_identity(ctx
, op
,
4308 ac_get_type_size(LLVMTypeOf(src
)));
4309 result
= LLVMBuildBitCast(ctx
->builder
,
4310 ac_build_set_inactive(ctx
, src
, identity
),
4311 LLVMTypeOf(identity
), "");
4312 swap
= ac_build_quad_swizzle(ctx
, result
, 1, 0, 3, 2);
4313 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4314 if (cluster_size
== 2) return ac_build_wwm(ctx
, result
);
4316 swap
= ac_build_quad_swizzle(ctx
, result
, 2, 3, 0, 1);
4317 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4318 if (cluster_size
== 4) return ac_build_wwm(ctx
, result
);
4320 if (ctx
->chip_class
>= GFX8
)
4321 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_half_mirror
, 0xf, 0xf, false);
4323 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x04));
4324 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4325 if (cluster_size
== 8) return ac_build_wwm(ctx
, result
);
4327 if (ctx
->chip_class
>= GFX8
)
4328 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_mirror
, 0xf, 0xf, false);
4330 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x08));
4331 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4332 if (cluster_size
== 16) return ac_build_wwm(ctx
, result
);
4334 if (ctx
->chip_class
>= GFX10
)
4335 swap
= ac_build_permlane16(ctx
, result
, 0, true, false);
4336 else if (ctx
->chip_class
>= GFX8
&& cluster_size
!= 32)
4337 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
4339 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x10));
4340 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4341 if (cluster_size
== 32) return ac_build_wwm(ctx
, result
);
4343 if (ctx
->chip_class
>= GFX8
) {
4344 if (ctx
->chip_class
>= GFX10
)
4345 swap
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 31, false));
4347 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
4348 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4349 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 63, 0));
4350 return ac_build_wwm(ctx
, result
);
4352 swap
= ac_build_readlane(ctx
, result
, ctx
->i32_0
);
4353 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 32, 0));
4354 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
4355 return ac_build_wwm(ctx
, result
);
4360 * "Top half" of a scan that reduces per-wave values across an entire
4363 * The source value must be present in the highest lane of the wave, and the
4364 * highest lane must be live.
4367 ac_build_wg_wavescan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4369 if (ws
->maxwaves
<= 1)
4372 const LLVMValueRef last_lane
= LLVMConstInt(ctx
->i32
, ctx
->wave_size
- 1, false);
4373 LLVMBuilderRef builder
= ctx
->builder
;
4374 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4377 tmp
= LLVMBuildICmp(builder
, LLVMIntEQ
, tid
, last_lane
, "");
4378 ac_build_ifcc(ctx
, tmp
, 1000);
4379 LLVMBuildStore(builder
, ws
->src
, LLVMBuildGEP(builder
, ws
->scratch
, &ws
->waveidx
, 1, ""));
4380 ac_build_endif(ctx
, 1000);
4384 * "Bottom half" of a scan that reduces per-wave values across an entire
4387 * The caller must place a barrier between the top and bottom halves.
4390 ac_build_wg_wavescan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4392 const LLVMTypeRef type
= LLVMTypeOf(ws
->src
);
4393 const LLVMValueRef identity
=
4394 get_reduction_identity(ctx
, ws
->op
, ac_get_type_size(type
));
4396 if (ws
->maxwaves
<= 1) {
4397 ws
->result_reduce
= ws
->src
;
4398 ws
->result_inclusive
= ws
->src
;
4399 ws
->result_exclusive
= identity
;
4402 assert(ws
->maxwaves
<= 32);
4404 LLVMBuilderRef builder
= ctx
->builder
;
4405 LLVMValueRef tid
= ac_get_thread_id(ctx
);
4406 LLVMBasicBlockRef bbs
[2];
4407 LLVMValueRef phivalues_scan
[2];
4408 LLVMValueRef tmp
, tmp2
;
4410 bbs
[0] = LLVMGetInsertBlock(builder
);
4411 phivalues_scan
[0] = LLVMGetUndef(type
);
4413 if (ws
->enable_reduce
)
4414 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->numwaves
, "");
4415 else if (ws
->enable_inclusive
)
4416 tmp
= LLVMBuildICmp(builder
, LLVMIntULE
, tid
, ws
->waveidx
, "");
4418 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->waveidx
, "");
4419 ac_build_ifcc(ctx
, tmp
, 1001);
4421 tmp
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, ws
->scratch
, &tid
, 1, ""), "");
4423 ac_build_optimization_barrier(ctx
, &tmp
);
4425 bbs
[1] = LLVMGetInsertBlock(builder
);
4426 phivalues_scan
[1] = ac_build_scan(ctx
, ws
->op
, tmp
, identity
, ws
->maxwaves
, true);
4428 ac_build_endif(ctx
, 1001);
4430 const LLVMValueRef scan
= ac_build_phi(ctx
, type
, 2, phivalues_scan
, bbs
);
4432 if (ws
->enable_reduce
) {
4433 tmp
= LLVMBuildSub(builder
, ws
->numwaves
, ctx
->i32_1
, "");
4434 ws
->result_reduce
= ac_build_readlane(ctx
, scan
, tmp
);
4436 if (ws
->enable_inclusive
)
4437 ws
->result_inclusive
= ac_build_readlane(ctx
, scan
, ws
->waveidx
);
4438 if (ws
->enable_exclusive
) {
4439 tmp
= LLVMBuildSub(builder
, ws
->waveidx
, ctx
->i32_1
, "");
4440 tmp
= ac_build_readlane(ctx
, scan
, tmp
);
4441 tmp2
= LLVMBuildICmp(builder
, LLVMIntEQ
, ws
->waveidx
, ctx
->i32_0
, "");
4442 ws
->result_exclusive
= LLVMBuildSelect(builder
, tmp2
, identity
, tmp
, "");
4447 * Inclusive scan of a per-wave value across an entire workgroup.
4449 * This implies an s_barrier instruction.
4451 * Unlike ac_build_inclusive_scan, the caller \em must ensure that all threads
4452 * of the workgroup are live. (This requirement cannot easily be relaxed in a
4453 * useful manner because of the barrier in the algorithm.)
4456 ac_build_wg_wavescan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4458 ac_build_wg_wavescan_top(ctx
, ws
);
4459 ac_build_s_barrier(ctx
);
4460 ac_build_wg_wavescan_bottom(ctx
, ws
);
4464 * "Top half" of a scan that reduces per-thread values across an entire
4467 * All lanes must be active when this code runs.
4470 ac_build_wg_scan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4472 if (ws
->enable_exclusive
) {
4473 ws
->extra
= ac_build_exclusive_scan(ctx
, ws
->src
, ws
->op
);
4474 if (LLVMTypeOf(ws
->src
) == ctx
->i1
&& ws
->op
== nir_op_iadd
)
4475 ws
->src
= LLVMBuildZExt(ctx
->builder
, ws
->src
, ctx
->i32
, "");
4476 ws
->src
= ac_build_alu_op(ctx
, ws
->extra
, ws
->src
, ws
->op
);
4478 ws
->src
= ac_build_inclusive_scan(ctx
, ws
->src
, ws
->op
);
4481 bool enable_inclusive
= ws
->enable_inclusive
;
4482 bool enable_exclusive
= ws
->enable_exclusive
;
4483 ws
->enable_inclusive
= false;
4484 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4485 ac_build_wg_wavescan_top(ctx
, ws
);
4486 ws
->enable_inclusive
= enable_inclusive
;
4487 ws
->enable_exclusive
= enable_exclusive
;
4491 * "Bottom half" of a scan that reduces per-thread values across an entire
4494 * The caller must place a barrier between the top and bottom halves.
4497 ac_build_wg_scan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4499 bool enable_inclusive
= ws
->enable_inclusive
;
4500 bool enable_exclusive
= ws
->enable_exclusive
;
4501 ws
->enable_inclusive
= false;
4502 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
4503 ac_build_wg_wavescan_bottom(ctx
, ws
);
4504 ws
->enable_inclusive
= enable_inclusive
;
4505 ws
->enable_exclusive
= enable_exclusive
;
4507 /* ws->result_reduce is already the correct value */
4508 if (ws
->enable_inclusive
)
4509 ws
->result_inclusive
= ac_build_alu_op(ctx
, ws
->result_inclusive
, ws
->src
, ws
->op
);
4510 if (ws
->enable_exclusive
)
4511 ws
->result_exclusive
= ac_build_alu_op(ctx
, ws
->result_exclusive
, ws
->extra
, ws
->op
);
4515 * A scan that reduces per-thread values across an entire workgroup.
4517 * The caller must ensure that all lanes are active when this code runs
4518 * (WWM is insufficient!), because there is an implied barrier.
4521 ac_build_wg_scan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
4523 ac_build_wg_scan_top(ctx
, ws
);
4524 ac_build_s_barrier(ctx
);
4525 ac_build_wg_scan_bottom(ctx
, ws
);
4529 ac_build_quad_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
4530 unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
4532 unsigned mask
= dpp_quad_perm(lane0
, lane1
, lane2
, lane3
);
4533 if (ctx
->chip_class
>= GFX8
) {
4534 return ac_build_dpp(ctx
, src
, src
, mask
, 0xf, 0xf, false);
4536 return ac_build_ds_swizzle(ctx
, src
, (1 << 15) | mask
);
4541 ac_build_shuffle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef index
)
4543 index
= LLVMBuildMul(ctx
->builder
, index
, LLVMConstInt(ctx
->i32
, 4, 0), "");
4544 return ac_build_intrinsic(ctx
,
4545 "llvm.amdgcn.ds.bpermute", ctx
->i32
,
4546 (LLVMValueRef
[]) {index
, src
}, 2,
4547 AC_FUNC_ATTR_READNONE
|
4548 AC_FUNC_ATTR_CONVERGENT
);
4552 ac_build_frexp_exp(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4558 if (bitsize
== 16) {
4559 intr
= "llvm.amdgcn.frexp.exp.i16.f16";
4561 } else if (bitsize
== 32) {
4562 intr
= "llvm.amdgcn.frexp.exp.i32.f32";
4565 intr
= "llvm.amdgcn.frexp.exp.i32.f64";
4569 LLVMValueRef params
[] = {
4572 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4573 AC_FUNC_ATTR_READNONE
);
4576 ac_build_frexp_mant(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
4582 if (bitsize
== 16) {
4583 intr
= "llvm.amdgcn.frexp.mant.f16";
4585 } else if (bitsize
== 32) {
4586 intr
= "llvm.amdgcn.frexp.mant.f32";
4589 intr
= "llvm.amdgcn.frexp.mant.f64";
4593 LLVMValueRef params
[] = {
4596 return ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
4597 AC_FUNC_ATTR_READNONE
);
4601 * this takes an I,J coordinate pair,
4602 * and works out the X and Y derivatives.
4603 * it returns DDX(I), DDX(J), DDY(I), DDY(J).
4606 ac_build_ddxy_interp(struct ac_llvm_context
*ctx
, LLVMValueRef interp_ij
)
4608 LLVMValueRef result
[4], a
;
4611 for (i
= 0; i
< 2; i
++) {
4612 a
= LLVMBuildExtractElement(ctx
->builder
, interp_ij
,
4613 LLVMConstInt(ctx
->i32
, i
, false), "");
4614 result
[i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 1, a
);
4615 result
[2+i
] = ac_build_ddxy(ctx
, AC_TID_MASK_TOP_LEFT
, 2, a
);
4617 return ac_build_gather_values(ctx
, result
, 4);
4621 ac_build_load_helper_invocation(struct ac_llvm_context
*ctx
)
4623 LLVMValueRef result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.ps.live",
4625 AC_FUNC_ATTR_READNONE
);
4626 result
= LLVMBuildNot(ctx
->builder
, result
, "");
4627 return LLVMBuildSExt(ctx
->builder
, result
, ctx
->i32
, "");
4630 LLVMValueRef
ac_build_call(struct ac_llvm_context
*ctx
, LLVMValueRef func
,
4631 LLVMValueRef
*args
, unsigned num_args
)
4633 LLVMValueRef ret
= LLVMBuildCall(ctx
->builder
, func
, args
, num_args
, "");
4634 LLVMSetInstructionCallConv(ret
, LLVMGetFunctionCallConv(func
));