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 enum chip_class chip_class
, enum radeon_family family
)
65 ctx
->context
= LLVMContextCreate();
67 ctx
->chip_class
= chip_class
;
72 ctx
->voidt
= LLVMVoidTypeInContext(ctx
->context
);
73 ctx
->i1
= LLVMInt1TypeInContext(ctx
->context
);
74 ctx
->i8
= LLVMInt8TypeInContext(ctx
->context
);
75 ctx
->i16
= LLVMIntTypeInContext(ctx
->context
, 16);
76 ctx
->i32
= LLVMIntTypeInContext(ctx
->context
, 32);
77 ctx
->i64
= LLVMIntTypeInContext(ctx
->context
, 64);
78 ctx
->intptr
= ctx
->i32
;
79 ctx
->f16
= LLVMHalfTypeInContext(ctx
->context
);
80 ctx
->f32
= LLVMFloatTypeInContext(ctx
->context
);
81 ctx
->f64
= LLVMDoubleTypeInContext(ctx
->context
);
82 ctx
->v2i16
= LLVMVectorType(ctx
->i16
, 2);
83 ctx
->v2i32
= LLVMVectorType(ctx
->i32
, 2);
84 ctx
->v3i32
= LLVMVectorType(ctx
->i32
, 3);
85 ctx
->v4i32
= LLVMVectorType(ctx
->i32
, 4);
86 ctx
->v2f32
= LLVMVectorType(ctx
->f32
, 2);
87 ctx
->v4f32
= LLVMVectorType(ctx
->f32
, 4);
88 ctx
->v8i32
= LLVMVectorType(ctx
->i32
, 8);
90 ctx
->i16_0
= LLVMConstInt(ctx
->i16
, 0, false);
91 ctx
->i16_1
= LLVMConstInt(ctx
->i16
, 1, false);
92 ctx
->i32_0
= LLVMConstInt(ctx
->i32
, 0, false);
93 ctx
->i32_1
= LLVMConstInt(ctx
->i32
, 1, false);
94 ctx
->i64_0
= LLVMConstInt(ctx
->i64
, 0, false);
95 ctx
->i64_1
= LLVMConstInt(ctx
->i64
, 1, false);
96 ctx
->f32_0
= LLVMConstReal(ctx
->f32
, 0.0);
97 ctx
->f32_1
= LLVMConstReal(ctx
->f32
, 1.0);
98 ctx
->f64_0
= LLVMConstReal(ctx
->f64
, 0.0);
99 ctx
->f64_1
= LLVMConstReal(ctx
->f64
, 1.0);
101 ctx
->i1false
= LLVMConstInt(ctx
->i1
, 0, false);
102 ctx
->i1true
= LLVMConstInt(ctx
->i1
, 1, false);
104 ctx
->range_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
107 ctx
->invariant_load_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
108 "invariant.load", 14);
110 ctx
->fpmath_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
, "fpmath", 6);
112 args
[0] = LLVMConstReal(ctx
->f32
, 2.5);
113 ctx
->fpmath_md_2p5_ulp
= LLVMMDNodeInContext(ctx
->context
, args
, 1);
115 ctx
->uniform_md_kind
= LLVMGetMDKindIDInContext(ctx
->context
,
116 "amdgpu.uniform", 14);
118 ctx
->empty_md
= LLVMMDNodeInContext(ctx
->context
, NULL
, 0);
122 ac_llvm_context_dispose(struct ac_llvm_context
*ctx
)
126 ctx
->flow_depth_max
= 0;
130 ac_get_llvm_num_components(LLVMValueRef value
)
132 LLVMTypeRef type
= LLVMTypeOf(value
);
133 unsigned num_components
= LLVMGetTypeKind(type
) == LLVMVectorTypeKind
134 ? LLVMGetVectorSize(type
)
136 return num_components
;
140 ac_llvm_extract_elem(struct ac_llvm_context
*ac
,
144 if (LLVMGetTypeKind(LLVMTypeOf(value
)) != LLVMVectorTypeKind
) {
149 return LLVMBuildExtractElement(ac
->builder
, value
,
150 LLVMConstInt(ac
->i32
, index
, false), "");
154 ac_get_elem_bits(struct ac_llvm_context
*ctx
, LLVMTypeRef type
)
156 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
)
157 type
= LLVMGetElementType(type
);
159 if (LLVMGetTypeKind(type
) == LLVMIntegerTypeKind
)
160 return LLVMGetIntTypeWidth(type
);
162 if (type
== ctx
->f16
)
164 if (type
== ctx
->f32
)
166 if (type
== ctx
->f64
)
169 unreachable("Unhandled type kind in get_elem_bits");
173 ac_get_type_size(LLVMTypeRef type
)
175 LLVMTypeKind kind
= LLVMGetTypeKind(type
);
178 case LLVMIntegerTypeKind
:
179 return LLVMGetIntTypeWidth(type
) / 8;
180 case LLVMHalfTypeKind
:
182 case LLVMFloatTypeKind
:
184 case LLVMDoubleTypeKind
:
186 case LLVMPointerTypeKind
:
187 if (LLVMGetPointerAddressSpace(type
) == AC_ADDR_SPACE_CONST_32BIT
)
190 case LLVMVectorTypeKind
:
191 return LLVMGetVectorSize(type
) *
192 ac_get_type_size(LLVMGetElementType(type
));
193 case LLVMArrayTypeKind
:
194 return LLVMGetArrayLength(type
) *
195 ac_get_type_size(LLVMGetElementType(type
));
202 static LLVMTypeRef
to_integer_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
204 if (t
== ctx
->f16
|| t
== ctx
->i16
)
206 else if (t
== ctx
->f32
|| t
== ctx
->i32
)
208 else if (t
== ctx
->f64
|| t
== ctx
->i64
)
211 unreachable("Unhandled integer size");
215 ac_to_integer_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
217 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
218 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
219 return LLVMVectorType(to_integer_type_scalar(ctx
, elem_type
),
220 LLVMGetVectorSize(t
));
222 if (LLVMGetTypeKind(t
) == LLVMPointerTypeKind
) {
223 switch (LLVMGetPointerAddressSpace(t
)) {
224 case AC_ADDR_SPACE_GLOBAL
:
226 case AC_ADDR_SPACE_LDS
:
229 unreachable("unhandled address space");
232 return to_integer_type_scalar(ctx
, t
);
236 ac_to_integer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
238 LLVMTypeRef type
= LLVMTypeOf(v
);
239 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
) {
240 return LLVMBuildPtrToInt(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
242 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_integer_type(ctx
, type
), "");
246 ac_to_integer_or_pointer(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
248 LLVMTypeRef type
= LLVMTypeOf(v
);
249 if (LLVMGetTypeKind(type
) == LLVMPointerTypeKind
)
251 return ac_to_integer(ctx
, v
);
254 static LLVMTypeRef
to_float_type_scalar(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
256 if (t
== ctx
->i16
|| t
== ctx
->f16
)
258 else if (t
== ctx
->i32
|| t
== ctx
->f32
)
260 else if (t
== ctx
->i64
|| t
== ctx
->f64
)
263 unreachable("Unhandled float size");
267 ac_to_float_type(struct ac_llvm_context
*ctx
, LLVMTypeRef t
)
269 if (LLVMGetTypeKind(t
) == LLVMVectorTypeKind
) {
270 LLVMTypeRef elem_type
= LLVMGetElementType(t
);
271 return LLVMVectorType(to_float_type_scalar(ctx
, elem_type
),
272 LLVMGetVectorSize(t
));
274 return to_float_type_scalar(ctx
, t
);
278 ac_to_float(struct ac_llvm_context
*ctx
, LLVMValueRef v
)
280 LLVMTypeRef type
= LLVMTypeOf(v
);
281 return LLVMBuildBitCast(ctx
->builder
, v
, ac_to_float_type(ctx
, type
), "");
286 ac_build_intrinsic(struct ac_llvm_context
*ctx
, const char *name
,
287 LLVMTypeRef return_type
, LLVMValueRef
*params
,
288 unsigned param_count
, unsigned attrib_mask
)
290 LLVMValueRef function
, call
;
291 bool set_callsite_attrs
= !(attrib_mask
& AC_FUNC_ATTR_LEGACY
);
293 function
= LLVMGetNamedFunction(ctx
->module
, name
);
295 LLVMTypeRef param_types
[32], function_type
;
298 assert(param_count
<= 32);
300 for (i
= 0; i
< param_count
; ++i
) {
302 param_types
[i
] = LLVMTypeOf(params
[i
]);
305 LLVMFunctionType(return_type
, param_types
, param_count
, 0);
306 function
= LLVMAddFunction(ctx
->module
, name
, function_type
);
308 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
309 LLVMSetLinkage(function
, LLVMExternalLinkage
);
311 if (!set_callsite_attrs
)
312 ac_add_func_attributes(ctx
->context
, function
, attrib_mask
);
315 call
= LLVMBuildCall(ctx
->builder
, function
, params
, param_count
, "");
316 if (set_callsite_attrs
)
317 ac_add_func_attributes(ctx
->context
, call
, attrib_mask
);
322 * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
325 void ac_build_type_name_for_intr(LLVMTypeRef type
, char *buf
, unsigned bufsize
)
327 LLVMTypeRef elem_type
= type
;
329 assert(bufsize
>= 8);
331 if (LLVMGetTypeKind(type
) == LLVMVectorTypeKind
) {
332 int ret
= snprintf(buf
, bufsize
, "v%u",
333 LLVMGetVectorSize(type
));
335 char *type_name
= LLVMPrintTypeToString(type
);
336 fprintf(stderr
, "Error building type name for: %s\n",
340 elem_type
= LLVMGetElementType(type
);
344 switch (LLVMGetTypeKind(elem_type
)) {
346 case LLVMIntegerTypeKind
:
347 snprintf(buf
, bufsize
, "i%d", LLVMGetIntTypeWidth(elem_type
));
349 case LLVMHalfTypeKind
:
350 snprintf(buf
, bufsize
, "f16");
352 case LLVMFloatTypeKind
:
353 snprintf(buf
, bufsize
, "f32");
355 case LLVMDoubleTypeKind
:
356 snprintf(buf
, bufsize
, "f64");
362 * Helper function that builds an LLVM IR PHI node and immediately adds
366 ac_build_phi(struct ac_llvm_context
*ctx
, LLVMTypeRef type
,
367 unsigned count_incoming
, LLVMValueRef
*values
,
368 LLVMBasicBlockRef
*blocks
)
370 LLVMValueRef phi
= LLVMBuildPhi(ctx
->builder
, type
, "");
371 LLVMAddIncoming(phi
, values
, blocks
, count_incoming
);
375 void ac_build_s_barrier(struct ac_llvm_context
*ctx
)
377 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.barrier", ctx
->voidt
, NULL
,
378 0, AC_FUNC_ATTR_CONVERGENT
);
381 /* Prevent optimizations (at least of memory accesses) across the current
382 * point in the program by emitting empty inline assembly that is marked as
383 * having side effects.
385 * Optionally, a value can be passed through the inline assembly to prevent
386 * LLVM from hoisting calls to ReadNone functions.
389 ac_build_optimization_barrier(struct ac_llvm_context
*ctx
,
392 static int counter
= 0;
394 LLVMBuilderRef builder
= ctx
->builder
;
397 snprintf(code
, sizeof(code
), "; %d", p_atomic_inc_return(&counter
));
400 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->voidt
, NULL
, 0, false);
401 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "", true, false);
402 LLVMBuildCall(builder
, inlineasm
, NULL
, 0, "");
404 LLVMTypeRef ftype
= LLVMFunctionType(ctx
->i32
, &ctx
->i32
, 1, false);
405 LLVMValueRef inlineasm
= LLVMConstInlineAsm(ftype
, code
, "=v,0", true, false);
406 LLVMValueRef vgpr
= *pvgpr
;
407 LLVMTypeRef vgpr_type
= LLVMTypeOf(vgpr
);
408 unsigned vgpr_size
= ac_get_type_size(vgpr_type
);
411 assert(vgpr_size
% 4 == 0);
413 vgpr
= LLVMBuildBitCast(builder
, vgpr
, LLVMVectorType(ctx
->i32
, vgpr_size
/ 4), "");
414 vgpr0
= LLVMBuildExtractElement(builder
, vgpr
, ctx
->i32_0
, "");
415 vgpr0
= LLVMBuildCall(builder
, inlineasm
, &vgpr0
, 1, "");
416 vgpr
= LLVMBuildInsertElement(builder
, vgpr
, vgpr0
, ctx
->i32_0
, "");
417 vgpr
= LLVMBuildBitCast(builder
, vgpr
, vgpr_type
, "");
424 ac_build_shader_clock(struct ac_llvm_context
*ctx
)
426 LLVMValueRef tmp
= ac_build_intrinsic(ctx
, "llvm.readcyclecounter",
427 ctx
->i64
, NULL
, 0, 0);
428 return LLVMBuildBitCast(ctx
->builder
, tmp
, ctx
->v2i32
, "");
432 ac_build_ballot(struct ac_llvm_context
*ctx
,
435 LLVMValueRef args
[3] = {
438 LLVMConstInt(ctx
->i32
, LLVMIntNE
, 0)
441 /* We currently have no other way to prevent LLVM from lifting the icmp
442 * calls to a dominating basic block.
444 ac_build_optimization_barrier(ctx
, &args
[0]);
446 args
[0] = ac_to_integer(ctx
, args
[0]);
448 return ac_build_intrinsic(ctx
,
449 "llvm.amdgcn.icmp.i32",
451 AC_FUNC_ATTR_NOUNWIND
|
452 AC_FUNC_ATTR_READNONE
|
453 AC_FUNC_ATTR_CONVERGENT
);
457 ac_build_vote_all(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
459 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
460 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
461 return LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, vote_set
, active_set
, "");
465 ac_build_vote_any(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
467 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
468 return LLVMBuildICmp(ctx
->builder
, LLVMIntNE
, vote_set
,
469 LLVMConstInt(ctx
->i64
, 0, 0), "");
473 ac_build_vote_eq(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
475 LLVMValueRef active_set
= ac_build_ballot(ctx
, ctx
->i32_1
);
476 LLVMValueRef vote_set
= ac_build_ballot(ctx
, value
);
478 LLVMValueRef all
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
479 vote_set
, active_set
, "");
480 LLVMValueRef none
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
482 LLVMConstInt(ctx
->i64
, 0, 0), "");
483 return LLVMBuildOr(ctx
->builder
, all
, none
, "");
487 ac_build_varying_gather_values(struct ac_llvm_context
*ctx
, LLVMValueRef
*values
,
488 unsigned value_count
, unsigned component
)
490 LLVMValueRef vec
= NULL
;
492 if (value_count
== 1) {
493 return values
[component
];
494 } else if (!value_count
)
495 unreachable("value_count is 0");
497 for (unsigned i
= component
; i
< value_count
+ component
; i
++) {
498 LLVMValueRef value
= values
[i
];
501 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
502 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
- component
, false);
503 vec
= LLVMBuildInsertElement(ctx
->builder
, vec
, value
, index
, "");
509 ac_build_gather_values_extended(struct ac_llvm_context
*ctx
,
510 LLVMValueRef
*values
,
511 unsigned value_count
,
512 unsigned value_stride
,
516 LLVMBuilderRef builder
= ctx
->builder
;
517 LLVMValueRef vec
= NULL
;
520 if (value_count
== 1 && !always_vector
) {
522 return LLVMBuildLoad(builder
, values
[0], "");
524 } else if (!value_count
)
525 unreachable("value_count is 0");
527 for (i
= 0; i
< value_count
; i
++) {
528 LLVMValueRef value
= values
[i
* value_stride
];
530 value
= LLVMBuildLoad(builder
, value
, "");
533 vec
= LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value
), value_count
));
534 LLVMValueRef index
= LLVMConstInt(ctx
->i32
, i
, false);
535 vec
= LLVMBuildInsertElement(builder
, vec
, value
, index
, "");
541 ac_build_gather_values(struct ac_llvm_context
*ctx
,
542 LLVMValueRef
*values
,
543 unsigned value_count
)
545 return ac_build_gather_values_extended(ctx
, values
, value_count
, 1, false, false);
548 /* Expand a scalar or vector to <dst_channels x type> by filling the remaining
549 * channels with undef. Extract at most src_channels components from the input.
552 ac_build_expand(struct ac_llvm_context
*ctx
,
554 unsigned src_channels
,
555 unsigned dst_channels
)
557 LLVMTypeRef elemtype
;
558 LLVMValueRef chan
[dst_channels
];
560 if (LLVMGetTypeKind(LLVMTypeOf(value
)) == LLVMVectorTypeKind
) {
561 unsigned vec_size
= LLVMGetVectorSize(LLVMTypeOf(value
));
563 if (src_channels
== dst_channels
&& vec_size
== dst_channels
)
566 src_channels
= MIN2(src_channels
, vec_size
);
568 for (unsigned i
= 0; i
< src_channels
; i
++)
569 chan
[i
] = ac_llvm_extract_elem(ctx
, value
, i
);
571 elemtype
= LLVMGetElementType(LLVMTypeOf(value
));
574 assert(src_channels
== 1);
577 elemtype
= LLVMTypeOf(value
);
580 for (unsigned i
= src_channels
; i
< dst_channels
; i
++)
581 chan
[i
] = LLVMGetUndef(elemtype
);
583 return ac_build_gather_values(ctx
, chan
, dst_channels
);
586 /* Expand a scalar or vector to <4 x type> by filling the remaining channels
587 * with undef. Extract at most num_channels components from the input.
589 LLVMValueRef
ac_build_expand_to_vec4(struct ac_llvm_context
*ctx
,
591 unsigned num_channels
)
593 return ac_build_expand(ctx
, value
, num_channels
, 4);
596 LLVMValueRef
ac_build_round(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
598 unsigned type_size
= ac_get_type_size(LLVMTypeOf(value
));
602 name
= "llvm.rint.f16";
603 else if (type_size
== 4)
604 name
= "llvm.rint.f32";
606 name
= "llvm.rint.f64";
608 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(value
), &value
, 1,
609 AC_FUNC_ATTR_READNONE
);
613 ac_build_fdiv(struct ac_llvm_context
*ctx
,
617 /* If we do (num / den), LLVM >= 7.0 does:
618 * return num * v_rcp_f32(den * (fabs(den) > 0x1.0p+96f ? 0x1.0p-32f : 1.0f));
620 * If we do (num * (1 / den)), LLVM does:
621 * return num * v_rcp_f32(den);
623 LLVMValueRef one
= LLVMConstReal(LLVMTypeOf(num
), 1.0);
624 LLVMValueRef rcp
= LLVMBuildFDiv(ctx
->builder
, one
, den
, "");
625 LLVMValueRef ret
= LLVMBuildFMul(ctx
->builder
, num
, rcp
, "");
627 /* Use v_rcp_f32 instead of precise division. */
628 if (!LLVMIsConstant(ret
))
629 LLVMSetMetadata(ret
, ctx
->fpmath_md_kind
, ctx
->fpmath_md_2p5_ulp
);
633 /* See fast_idiv_by_const.h. */
634 /* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */
635 LLVMValueRef
ac_build_fast_udiv(struct ac_llvm_context
*ctx
,
637 LLVMValueRef multiplier
,
638 LLVMValueRef pre_shift
,
639 LLVMValueRef post_shift
,
640 LLVMValueRef increment
)
642 LLVMBuilderRef builder
= ctx
->builder
;
644 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
645 num
= LLVMBuildMul(builder
,
646 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
647 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
648 num
= LLVMBuildAdd(builder
, num
,
649 LLVMBuildZExt(builder
, increment
, ctx
->i64
, ""), "");
650 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
651 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
652 return LLVMBuildLShr(builder
, num
, post_shift
, "");
655 /* See fast_idiv_by_const.h. */
656 /* If num != UINT_MAX, this more efficient version can be used. */
657 /* Set: increment = util_fast_udiv_info::increment; */
658 LLVMValueRef
ac_build_fast_udiv_nuw(struct ac_llvm_context
*ctx
,
660 LLVMValueRef multiplier
,
661 LLVMValueRef pre_shift
,
662 LLVMValueRef post_shift
,
663 LLVMValueRef increment
)
665 LLVMBuilderRef builder
= ctx
->builder
;
667 num
= LLVMBuildLShr(builder
, num
, pre_shift
, "");
668 num
= LLVMBuildNUWAdd(builder
, num
, increment
, "");
669 num
= LLVMBuildMul(builder
,
670 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
671 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
672 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
673 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
674 return LLVMBuildLShr(builder
, num
, post_shift
, "");
677 /* See fast_idiv_by_const.h. */
678 /* Both operands must fit in 31 bits and the divisor must not be 1. */
679 LLVMValueRef
ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context
*ctx
,
681 LLVMValueRef multiplier
,
682 LLVMValueRef post_shift
)
684 LLVMBuilderRef builder
= ctx
->builder
;
686 num
= LLVMBuildMul(builder
,
687 LLVMBuildZExt(builder
, num
, ctx
->i64
, ""),
688 LLVMBuildZExt(builder
, multiplier
, ctx
->i64
, ""), "");
689 num
= LLVMBuildLShr(builder
, num
, LLVMConstInt(ctx
->i64
, 32, 0), "");
690 num
= LLVMBuildTrunc(builder
, num
, ctx
->i32
, "");
691 return LLVMBuildLShr(builder
, num
, post_shift
, "");
694 /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27
695 * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is
696 * already multiplied by two. id is the cube face number.
698 struct cube_selection_coords
{
705 build_cube_intrinsic(struct ac_llvm_context
*ctx
,
707 struct cube_selection_coords
*out
)
709 LLVMTypeRef f32
= ctx
->f32
;
711 out
->stc
[1] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubetc",
712 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
713 out
->stc
[0] = ac_build_intrinsic(ctx
, "llvm.amdgcn.cubesc",
714 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
715 out
->ma
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubema",
716 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
717 out
->id
= ac_build_intrinsic(ctx
, "llvm.amdgcn.cubeid",
718 f32
, in
, 3, AC_FUNC_ATTR_READNONE
);
722 * Build a manual selection sequence for cube face sc/tc coordinates and
723 * major axis vector (multiplied by 2 for consistency) for the given
724 * vec3 \p coords, for the face implied by \p selcoords.
726 * For the major axis, we always adjust the sign to be in the direction of
727 * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards
728 * the selcoords major axis.
730 static void build_cube_select(struct ac_llvm_context
*ctx
,
731 const struct cube_selection_coords
*selcoords
,
732 const LLVMValueRef
*coords
,
733 LLVMValueRef
*out_st
,
734 LLVMValueRef
*out_ma
)
736 LLVMBuilderRef builder
= ctx
->builder
;
737 LLVMTypeRef f32
= LLVMTypeOf(coords
[0]);
738 LLVMValueRef is_ma_positive
;
740 LLVMValueRef is_ma_z
, is_not_ma_z
;
741 LLVMValueRef is_ma_y
;
742 LLVMValueRef is_ma_x
;
746 is_ma_positive
= LLVMBuildFCmp(builder
, LLVMRealUGE
,
747 selcoords
->ma
, LLVMConstReal(f32
, 0.0), "");
748 sgn_ma
= LLVMBuildSelect(builder
, is_ma_positive
,
749 LLVMConstReal(f32
, 1.0), LLVMConstReal(f32
, -1.0), "");
751 is_ma_z
= LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 4.0), "");
752 is_not_ma_z
= LLVMBuildNot(builder
, is_ma_z
, "");
753 is_ma_y
= LLVMBuildAnd(builder
, is_not_ma_z
,
754 LLVMBuildFCmp(builder
, LLVMRealUGE
, selcoords
->id
, LLVMConstReal(f32
, 2.0), ""), "");
755 is_ma_x
= LLVMBuildAnd(builder
, is_not_ma_z
, LLVMBuildNot(builder
, is_ma_y
, ""), "");
758 tmp
= LLVMBuildSelect(builder
, is_ma_x
, coords
[2], coords
[0], "");
759 sgn
= LLVMBuildSelect(builder
, is_ma_y
, LLVMConstReal(f32
, 1.0),
760 LLVMBuildSelect(builder
, is_ma_z
, sgn_ma
,
761 LLVMBuildFNeg(builder
, sgn_ma
, ""), ""), "");
762 out_st
[0] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
765 tmp
= LLVMBuildSelect(builder
, is_ma_y
, coords
[2], coords
[1], "");
766 sgn
= LLVMBuildSelect(builder
, is_ma_y
, sgn_ma
,
767 LLVMConstReal(f32
, -1.0), "");
768 out_st
[1] = LLVMBuildFMul(builder
, tmp
, sgn
, "");
771 tmp
= LLVMBuildSelect(builder
, is_ma_z
, coords
[2],
772 LLVMBuildSelect(builder
, is_ma_y
, coords
[1], coords
[0], ""), "");
773 tmp
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
774 ctx
->f32
, &tmp
, 1, AC_FUNC_ATTR_READNONE
);
775 *out_ma
= LLVMBuildFMul(builder
, tmp
, LLVMConstReal(f32
, 2.0), "");
779 ac_prepare_cube_coords(struct ac_llvm_context
*ctx
,
780 bool is_deriv
, bool is_array
, bool is_lod
,
781 LLVMValueRef
*coords_arg
,
782 LLVMValueRef
*derivs_arg
)
785 LLVMBuilderRef builder
= ctx
->builder
;
786 struct cube_selection_coords selcoords
;
787 LLVMValueRef coords
[3];
790 if (is_array
&& !is_lod
) {
791 LLVMValueRef tmp
= ac_build_round(ctx
, coords_arg
[3]);
793 /* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says:
795 * "For Array forms, the array layer used will be
797 * max(0, min(d−1, floor(layer+0.5)))
799 * where d is the depth of the texture array and layer
800 * comes from the component indicated in the tables below.
801 * Workaroudn for an issue where the layer is taken from a
802 * helper invocation which happens to fall on a different
803 * layer due to extrapolation."
805 * VI and earlier attempt to implement this in hardware by
806 * clamping the value of coords[2] = (8 * layer) + face.
807 * Unfortunately, this means that the we end up with the wrong
808 * face when clamping occurs.
810 * Clamp the layer earlier to work around the issue.
812 if (ctx
->chip_class
<= VI
) {
814 ge0
= LLVMBuildFCmp(builder
, LLVMRealOGE
, tmp
, ctx
->f32_0
, "");
815 tmp
= LLVMBuildSelect(builder
, ge0
, tmp
, ctx
->f32_0
, "");
821 build_cube_intrinsic(ctx
, coords_arg
, &selcoords
);
823 invma
= ac_build_intrinsic(ctx
, "llvm.fabs.f32",
824 ctx
->f32
, &selcoords
.ma
, 1, AC_FUNC_ATTR_READNONE
);
825 invma
= ac_build_fdiv(ctx
, LLVMConstReal(ctx
->f32
, 1.0), invma
);
827 for (int i
= 0; i
< 2; ++i
)
828 coords
[i
] = LLVMBuildFMul(builder
, selcoords
.stc
[i
], invma
, "");
830 coords
[2] = selcoords
.id
;
832 if (is_deriv
&& derivs_arg
) {
833 LLVMValueRef derivs
[4];
836 /* Convert cube derivatives to 2D derivatives. */
837 for (axis
= 0; axis
< 2; axis
++) {
838 LLVMValueRef deriv_st
[2];
839 LLVMValueRef deriv_ma
;
841 /* Transform the derivative alongside the texture
842 * coordinate. Mathematically, the correct formula is
843 * as follows. Assume we're projecting onto the +Z face
844 * and denote by dx/dh the derivative of the (original)
845 * X texture coordinate with respect to horizontal
846 * window coordinates. The projection onto the +Z face
851 * Then df/dh = df/dx * dx/dh + df/dz * dz/dh
852 * = 1/z * dx/dh - x/z * 1/z * dz/dh.
854 * This motivatives the implementation below.
856 * Whether this actually gives the expected results for
857 * apps that might feed in derivatives obtained via
858 * finite differences is anyone's guess. The OpenGL spec
859 * seems awfully quiet about how textureGrad for cube
860 * maps should be handled.
862 build_cube_select(ctx
, &selcoords
, &derivs_arg
[axis
* 3],
863 deriv_st
, &deriv_ma
);
865 deriv_ma
= LLVMBuildFMul(builder
, deriv_ma
, invma
, "");
867 for (int i
= 0; i
< 2; ++i
)
868 derivs
[axis
* 2 + i
] =
869 LLVMBuildFSub(builder
,
870 LLVMBuildFMul(builder
, deriv_st
[i
], invma
, ""),
871 LLVMBuildFMul(builder
, deriv_ma
, coords
[i
], ""), "");
874 memcpy(derivs_arg
, derivs
, sizeof(derivs
));
877 /* Shift the texture coordinate. This must be applied after the
878 * derivative calculation.
880 for (int i
= 0; i
< 2; ++i
)
881 coords
[i
] = LLVMBuildFAdd(builder
, coords
[i
], LLVMConstReal(ctx
->f32
, 1.5), "");
884 /* for cube arrays coord.z = coord.w(array_index) * 8 + face */
885 /* coords_arg.w component - array_index for cube arrays */
886 coords
[2] = ac_build_fmad(ctx
, coords_arg
[3], LLVMConstReal(ctx
->f32
, 8.0), coords
[2]);
889 memcpy(coords_arg
, coords
, sizeof(coords
));
894 ac_build_fs_interp(struct ac_llvm_context
*ctx
,
895 LLVMValueRef llvm_chan
,
896 LLVMValueRef attr_number
,
901 LLVMValueRef args
[5];
906 args
[2] = attr_number
;
909 p1
= ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p1",
910 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
915 args
[3] = attr_number
;
918 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.p2",
919 ctx
->f32
, args
, 5, AC_FUNC_ATTR_READNONE
);
923 ac_build_fs_interp_mov(struct ac_llvm_context
*ctx
,
924 LLVMValueRef parameter
,
925 LLVMValueRef llvm_chan
,
926 LLVMValueRef attr_number
,
929 LLVMValueRef args
[4];
933 args
[2] = attr_number
;
936 return ac_build_intrinsic(ctx
, "llvm.amdgcn.interp.mov",
937 ctx
->f32
, args
, 4, AC_FUNC_ATTR_READNONE
);
941 ac_build_gep_ptr(struct ac_llvm_context
*ctx
,
942 LLVMValueRef base_ptr
,
945 return LLVMBuildGEP(ctx
->builder
, base_ptr
, &index
, 1, "");
949 ac_build_gep0(struct ac_llvm_context
*ctx
,
950 LLVMValueRef base_ptr
,
953 LLVMValueRef indices
[2] = {
957 return LLVMBuildGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
960 LLVMValueRef
ac_build_pointer_add(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
963 return LLVMBuildPointerCast(ctx
->builder
,
964 ac_build_gep0(ctx
, ptr
, index
),
965 LLVMTypeOf(ptr
), "");
969 ac_build_indexed_store(struct ac_llvm_context
*ctx
,
970 LLVMValueRef base_ptr
, LLVMValueRef index
,
973 LLVMBuildStore(ctx
->builder
, value
,
974 ac_build_gep0(ctx
, base_ptr
, index
));
978 * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
979 * It's equivalent to doing a load from &base_ptr[index].
981 * \param base_ptr Where the array starts.
982 * \param index The element index into the array.
983 * \param uniform Whether the base_ptr and index can be assumed to be
984 * dynamically uniform (i.e. load to an SGPR)
985 * \param invariant Whether the load is invariant (no other opcodes affect it)
986 * \param no_unsigned_wraparound
987 * For all possible re-associations and re-distributions of an expression
988 * "base_ptr + index * elemsize" into "addr + offset" (excluding GEPs
989 * without inbounds in base_ptr), this parameter is true if "addr + offset"
990 * does not result in an unsigned integer wraparound. This is used for
991 * optimal code generation of 32-bit pointer arithmetic.
993 * For example, a 32-bit immediate offset that causes a 32-bit unsigned
994 * integer wraparound can't be an imm offset in s_load_dword, because
995 * the instruction performs "addr + offset" in 64 bits.
997 * Expected usage for bindless textures by chaining GEPs:
998 * // possible unsigned wraparound, don't use InBounds:
999 * ptr1 = LLVMBuildGEP(base_ptr, index);
1000 * image = load(ptr1); // becomes "s_load ptr1, 0"
1002 * ptr2 = LLVMBuildInBoundsGEP(ptr1, 32 / elemsize);
1003 * sampler = load(ptr2); // becomes "s_load ptr1, 32" thanks to InBounds
1006 ac_build_load_custom(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1007 LLVMValueRef index
, bool uniform
, bool invariant
,
1008 bool no_unsigned_wraparound
)
1010 LLVMValueRef pointer
, result
;
1011 LLVMValueRef indices
[2] = {ctx
->i32_0
, index
};
1013 if (no_unsigned_wraparound
&&
1014 LLVMGetPointerAddressSpace(LLVMTypeOf(base_ptr
)) == AC_ADDR_SPACE_CONST_32BIT
)
1015 pointer
= LLVMBuildInBoundsGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
1017 pointer
= LLVMBuildGEP(ctx
->builder
, base_ptr
, indices
, 2, "");
1020 LLVMSetMetadata(pointer
, ctx
->uniform_md_kind
, ctx
->empty_md
);
1021 result
= LLVMBuildLoad(ctx
->builder
, pointer
, "");
1023 LLVMSetMetadata(result
, ctx
->invariant_load_md_kind
, ctx
->empty_md
);
1027 LLVMValueRef
ac_build_load(struct ac_llvm_context
*ctx
, LLVMValueRef base_ptr
,
1030 return ac_build_load_custom(ctx
, base_ptr
, index
, false, false, false);
1033 LLVMValueRef
ac_build_load_invariant(struct ac_llvm_context
*ctx
,
1034 LLVMValueRef base_ptr
, LLVMValueRef index
)
1036 return ac_build_load_custom(ctx
, base_ptr
, index
, false, true, false);
1039 /* This assumes that there is no unsigned integer wraparound during the address
1040 * computation, excluding all GEPs within base_ptr. */
1041 LLVMValueRef
ac_build_load_to_sgpr(struct ac_llvm_context
*ctx
,
1042 LLVMValueRef base_ptr
, LLVMValueRef index
)
1044 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, true);
1047 /* See ac_build_load_custom() documentation. */
1048 LLVMValueRef
ac_build_load_to_sgpr_uint_wraparound(struct ac_llvm_context
*ctx
,
1049 LLVMValueRef base_ptr
, LLVMValueRef index
)
1051 return ac_build_load_custom(ctx
, base_ptr
, index
, true, true, false);
1054 /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
1055 * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
1056 * or v4i32 (num_channels=3,4).
1059 ac_build_buffer_store_dword(struct ac_llvm_context
*ctx
,
1062 unsigned num_channels
,
1063 LLVMValueRef voffset
,
1064 LLVMValueRef soffset
,
1065 unsigned inst_offset
,
1068 bool writeonly_memory
,
1069 bool swizzle_enable_hint
)
1071 /* Split 3 channel stores, becase LLVM doesn't support 3-channel
1073 if (num_channels
== 3) {
1074 LLVMValueRef v
[3], v01
;
1076 for (int i
= 0; i
< 3; i
++) {
1077 v
[i
] = LLVMBuildExtractElement(ctx
->builder
, vdata
,
1078 LLVMConstInt(ctx
->i32
, i
, 0), "");
1080 v01
= ac_build_gather_values(ctx
, v
, 2);
1082 ac_build_buffer_store_dword(ctx
, rsrc
, v01
, 2, voffset
,
1083 soffset
, inst_offset
, glc
, slc
,
1084 writeonly_memory
, swizzle_enable_hint
);
1085 ac_build_buffer_store_dword(ctx
, rsrc
, v
[2], 1, voffset
,
1086 soffset
, inst_offset
+ 8,
1088 writeonly_memory
, swizzle_enable_hint
);
1092 /* SWIZZLE_ENABLE requires that soffset isn't folded into voffset
1093 * (voffset is swizzled, but soffset isn't swizzled).
1094 * llvm.amdgcn.buffer.store doesn't have a separate soffset parameter.
1096 if (!swizzle_enable_hint
) {
1097 LLVMValueRef offset
= soffset
;
1099 static const char *types
[] = {"f32", "v2f32", "v4f32"};
1102 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1103 LLVMConstInt(ctx
->i32
, inst_offset
, 0), "");
1105 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1107 LLVMValueRef args
[] = {
1108 ac_to_float(ctx
, vdata
),
1109 LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, ""),
1112 LLVMConstInt(ctx
->i1
, glc
, 0),
1113 LLVMConstInt(ctx
->i1
, slc
, 0),
1117 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.store.%s",
1118 types
[CLAMP(num_channels
, 1, 3) - 1]);
1120 ac_build_intrinsic(ctx
, name
, ctx
->voidt
,
1121 args
, ARRAY_SIZE(args
),
1123 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
:
1124 AC_FUNC_ATTR_WRITEONLY
);
1128 static const unsigned dfmt
[] = {
1129 V_008F0C_BUF_DATA_FORMAT_32
,
1130 V_008F0C_BUF_DATA_FORMAT_32_32
,
1131 V_008F0C_BUF_DATA_FORMAT_32_32_32
,
1132 V_008F0C_BUF_DATA_FORMAT_32_32_32_32
1134 static const char *types
[] = {"i32", "v2i32", "v4i32"};
1135 LLVMValueRef args
[] = {
1137 LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, ""),
1139 voffset
? voffset
: ctx
->i32_0
,
1141 LLVMConstInt(ctx
->i32
, inst_offset
, 0),
1142 LLVMConstInt(ctx
->i32
, dfmt
[num_channels
- 1], 0),
1143 LLVMConstInt(ctx
->i32
, V_008F0C_BUF_NUM_FORMAT_UINT
, 0),
1144 LLVMConstInt(ctx
->i1
, glc
, 0),
1145 LLVMConstInt(ctx
->i1
, slc
, 0),
1148 snprintf(name
, sizeof(name
), "llvm.amdgcn.tbuffer.store.%s",
1149 types
[CLAMP(num_channels
, 1, 3) - 1]);
1151 ac_build_intrinsic(ctx
, name
, ctx
->voidt
,
1152 args
, ARRAY_SIZE(args
),
1154 AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY
:
1155 AC_FUNC_ATTR_WRITEONLY
);
1159 ac_build_buffer_load_common(struct ac_llvm_context
*ctx
,
1161 LLVMValueRef vindex
,
1162 LLVMValueRef voffset
,
1163 unsigned num_channels
,
1169 LLVMValueRef args
[] = {
1170 LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, ""),
1171 vindex
? vindex
: ctx
->i32_0
,
1173 LLVMConstInt(ctx
->i1
, glc
, 0),
1174 LLVMConstInt(ctx
->i1
, slc
, 0)
1176 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1178 LLVMTypeRef types
[] = {ctx
->f32
, ctx
->v2f32
, ctx
->v4f32
};
1179 const char *type_names
[] = {"f32", "v2f32", "v4f32"};
1183 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.load.format.%s",
1186 snprintf(name
, sizeof(name
), "llvm.amdgcn.buffer.load.%s",
1190 return ac_build_intrinsic(ctx
, name
, types
[func
], args
,
1192 ac_get_load_intr_attribs(can_speculate
));
1196 ac_build_llvm8_buffer_load_common(struct ac_llvm_context
*ctx
,
1198 LLVMValueRef vindex
,
1199 LLVMValueRef voffset
,
1200 LLVMValueRef soffset
,
1201 unsigned num_channels
,
1208 LLVMValueRef args
[5];
1210 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1212 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1213 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1214 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1215 args
[idx
++] = LLVMConstInt(ctx
->i32
, (glc
? 1 : 0) + (slc
? 2 : 0), 0);
1216 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1218 LLVMTypeRef types
[] = {ctx
->f32
, ctx
->v2f32
, ctx
->v4f32
};
1219 const char *type_names
[] = {"f32", "v2f32", "v4f32"};
1220 const char *indexing_kind
= structurized
? "struct" : "raw";
1224 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.format.%s",
1225 indexing_kind
, type_names
[func
]);
1227 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.buffer.load.%s",
1228 indexing_kind
, type_names
[func
]);
1231 return ac_build_intrinsic(ctx
, name
, types
[func
], args
,
1233 ac_get_load_intr_attribs(can_speculate
));
1237 ac_build_buffer_load(struct ac_llvm_context
*ctx
,
1240 LLVMValueRef vindex
,
1241 LLVMValueRef voffset
,
1242 LLVMValueRef soffset
,
1243 unsigned inst_offset
,
1249 LLVMValueRef offset
= LLVMConstInt(ctx
->i32
, inst_offset
, 0);
1251 offset
= LLVMBuildAdd(ctx
->builder
, offset
, voffset
, "");
1253 offset
= LLVMBuildAdd(ctx
->builder
, offset
, soffset
, "");
1255 if (allow_smem
&& !slc
&&
1256 (!glc
|| (HAVE_LLVM
>= 0x0800 && ctx
->chip_class
>= VI
))) {
1257 assert(vindex
== NULL
);
1259 LLVMValueRef result
[8];
1261 for (int i
= 0; i
< num_channels
; i
++) {
1263 offset
= LLVMBuildAdd(ctx
->builder
, offset
,
1264 LLVMConstInt(ctx
->i32
, 4, 0), "");
1266 const char *intrname
=
1267 HAVE_LLVM
>= 0x0800 ? "llvm.amdgcn.s.buffer.load.f32"
1268 : "llvm.SI.load.const.v4i32";
1269 unsigned num_args
= HAVE_LLVM
>= 0x0800 ? 3 : 2;
1270 LLVMValueRef args
[3] = {
1273 glc
? ctx
->i32_1
: ctx
->i32_0
,
1275 result
[i
] = ac_build_intrinsic(ctx
, intrname
,
1276 ctx
->f32
, args
, num_args
,
1277 AC_FUNC_ATTR_READNONE
|
1278 (HAVE_LLVM
< 0x0800 ? AC_FUNC_ATTR_LEGACY
: 0));
1280 if (num_channels
== 1)
1283 if (num_channels
== 3)
1284 result
[num_channels
++] = LLVMGetUndef(ctx
->f32
);
1285 return ac_build_gather_values(ctx
, result
, num_channels
);
1288 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
, offset
,
1289 num_channels
, glc
, slc
,
1290 can_speculate
, false);
1293 LLVMValueRef
ac_build_buffer_load_format(struct ac_llvm_context
*ctx
,
1295 LLVMValueRef vindex
,
1296 LLVMValueRef voffset
,
1297 unsigned num_channels
,
1301 if (HAVE_LLVM
>= 0x800) {
1302 return ac_build_llvm8_buffer_load_common(ctx
, rsrc
, vindex
, voffset
, ctx
->i32_0
,
1303 num_channels
, glc
, false,
1304 can_speculate
, true, true);
1306 return ac_build_buffer_load_common(ctx
, rsrc
, vindex
, voffset
,
1307 num_channels
, glc
, false,
1308 can_speculate
, true);
1311 LLVMValueRef
ac_build_buffer_load_format_gfx9_safe(struct ac_llvm_context
*ctx
,
1313 LLVMValueRef vindex
,
1314 LLVMValueRef voffset
,
1315 unsigned num_channels
,
1319 if (HAVE_LLVM
>= 0x800) {
1320 return ac_build_llvm8_buffer_load_common(ctx
, rsrc
, vindex
, voffset
, ctx
->i32_0
,
1321 num_channels
, glc
, false,
1322 can_speculate
, true, true);
1325 LLVMValueRef elem_count
= LLVMBuildExtractElement(ctx
->builder
, rsrc
, LLVMConstInt(ctx
->i32
, 2, 0), "");
1326 LLVMValueRef stride
= LLVMBuildExtractElement(ctx
->builder
, rsrc
, ctx
->i32_1
, "");
1327 stride
= LLVMBuildLShr(ctx
->builder
, stride
, LLVMConstInt(ctx
->i32
, 16, 0), "");
1329 LLVMValueRef new_elem_count
= LLVMBuildSelect(ctx
->builder
,
1330 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, elem_count
, stride
, ""),
1331 elem_count
, stride
, "");
1333 LLVMValueRef new_rsrc
= LLVMBuildInsertElement(ctx
->builder
, rsrc
, new_elem_count
,
1334 LLVMConstInt(ctx
->i32
, 2, 0), "");
1336 return ac_build_buffer_load_common(ctx
, new_rsrc
, vindex
, voffset
,
1337 num_channels
, glc
, false,
1338 can_speculate
, true);
1342 ac_build_tbuffer_load_short(struct ac_llvm_context
*ctx
,
1344 LLVMValueRef vindex
,
1345 LLVMValueRef voffset
,
1346 LLVMValueRef soffset
,
1347 LLVMValueRef immoffset
,
1350 unsigned dfmt
= V_008F0C_BUF_DATA_FORMAT_16
;
1351 unsigned nfmt
= V_008F0C_BUF_NUM_FORMAT_UINT
;
1354 if (HAVE_LLVM
>= 0x0800) {
1355 voffset
= LLVMBuildAdd(ctx
->builder
, voffset
, immoffset
, "");
1357 res
= ac_build_llvm8_tbuffer_load(ctx
, rsrc
, vindex
, voffset
,
1358 soffset
, 1, dfmt
, nfmt
, glc
,
1361 const char *name
= "llvm.amdgcn.tbuffer.load.i32";
1362 LLVMTypeRef type
= ctx
->i32
;
1363 LLVMValueRef params
[] = {
1369 LLVMConstInt(ctx
->i32
, dfmt
, false),
1370 LLVMConstInt(ctx
->i32
, nfmt
, false),
1374 res
= ac_build_intrinsic(ctx
, name
, type
, params
, 9, 0);
1377 return LLVMBuildTrunc(ctx
->builder
, res
, ctx
->i16
, "");
1381 ac_build_llvm8_tbuffer_load(struct ac_llvm_context
*ctx
,
1383 LLVMValueRef vindex
,
1384 LLVMValueRef voffset
,
1385 LLVMValueRef soffset
,
1386 unsigned num_channels
,
1394 LLVMValueRef args
[6];
1396 args
[idx
++] = LLVMBuildBitCast(ctx
->builder
, rsrc
, ctx
->v4i32
, "");
1398 args
[idx
++] = vindex
? vindex
: ctx
->i32_0
;
1399 args
[idx
++] = voffset
? voffset
: ctx
->i32_0
;
1400 args
[idx
++] = soffset
? soffset
: ctx
->i32_0
;
1401 args
[idx
++] = LLVMConstInt(ctx
->i32
, dfmt
| (nfmt
<< 4), 0);
1402 args
[idx
++] = LLVMConstInt(ctx
->i32
, (glc
? 1 : 0) + (slc
? 2 : 0), 0);
1403 unsigned func
= CLAMP(num_channels
, 1, 3) - 1;
1405 LLVMTypeRef types
[] = {ctx
->i32
, ctx
->v2i32
, ctx
->v4i32
};
1406 const char *type_names
[] = {"i32", "v2i32", "v4i32"};
1407 const char *indexing_kind
= structurized
? "struct" : "raw";
1410 snprintf(name
, sizeof(name
), "llvm.amdgcn.%s.tbuffer.load.%s",
1411 indexing_kind
, type_names
[func
]);
1413 return ac_build_intrinsic(ctx
, name
, types
[func
], args
,
1415 ac_get_load_intr_attribs(can_speculate
));
1419 * Set range metadata on an instruction. This can only be used on load and
1420 * call instructions. If you know an instruction can only produce the values
1421 * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
1422 * \p lo is the minimum value inclusive.
1423 * \p hi is the maximum value exclusive.
1425 static void set_range_metadata(struct ac_llvm_context
*ctx
,
1426 LLVMValueRef value
, unsigned lo
, unsigned hi
)
1428 LLVMValueRef range_md
, md_args
[2];
1429 LLVMTypeRef type
= LLVMTypeOf(value
);
1430 LLVMContextRef context
= LLVMGetTypeContext(type
);
1432 md_args
[0] = LLVMConstInt(type
, lo
, false);
1433 md_args
[1] = LLVMConstInt(type
, hi
, false);
1434 range_md
= LLVMMDNodeInContext(context
, md_args
, 2);
1435 LLVMSetMetadata(value
, ctx
->range_md_kind
, range_md
);
1439 ac_get_thread_id(struct ac_llvm_context
*ctx
)
1443 LLVMValueRef tid_args
[2];
1444 tid_args
[0] = LLVMConstInt(ctx
->i32
, 0xffffffff, false);
1445 tid_args
[1] = ctx
->i32_0
;
1446 tid_args
[1] = ac_build_intrinsic(ctx
,
1447 "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
1448 tid_args
, 2, AC_FUNC_ATTR_READNONE
);
1450 tid
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi",
1452 2, AC_FUNC_ATTR_READNONE
);
1453 set_range_metadata(ctx
, tid
, 0, 64);
1458 * SI implements derivatives using the local data store (LDS)
1459 * All writes to the LDS happen in all executing threads at
1460 * the same time. TID is the Thread ID for the current
1461 * thread and is a value between 0 and 63, representing
1462 * the thread's position in the wavefront.
1464 * For the pixel shader threads are grouped into quads of four pixels.
1465 * The TIDs of the pixels of a quad are:
1473 * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
1474 * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
1475 * the current pixel's column, and masking with 0xfffffffe yields the TID
1476 * of the left pixel of the current pixel's row.
1478 * Adding 1 yields the TID of the pixel to the right of the left pixel, and
1479 * adding 2 yields the TID of the pixel below the top pixel.
1482 ac_build_ddxy(struct ac_llvm_context
*ctx
,
1487 unsigned tl_lanes
[4], trbl_lanes
[4];
1488 LLVMValueRef tl
, trbl
;
1489 LLVMValueRef result
;
1491 for (unsigned i
= 0; i
< 4; ++i
) {
1492 tl_lanes
[i
] = i
& mask
;
1493 trbl_lanes
[i
] = (i
& mask
) + idx
;
1496 tl
= ac_build_quad_swizzle(ctx
, val
,
1497 tl_lanes
[0], tl_lanes
[1],
1498 tl_lanes
[2], tl_lanes
[3]);
1499 trbl
= ac_build_quad_swizzle(ctx
, val
,
1500 trbl_lanes
[0], trbl_lanes
[1],
1501 trbl_lanes
[2], trbl_lanes
[3]);
1503 tl
= LLVMBuildBitCast(ctx
->builder
, tl
, ctx
->f32
, "");
1504 trbl
= LLVMBuildBitCast(ctx
->builder
, trbl
, ctx
->f32
, "");
1505 result
= LLVMBuildFSub(ctx
->builder
, trbl
, tl
, "");
1507 result
= ac_build_intrinsic(ctx
, "llvm.amdgcn.wqm.f32", ctx
->f32
,
1514 ac_build_sendmsg(struct ac_llvm_context
*ctx
,
1516 LLVMValueRef wave_id
)
1518 LLVMValueRef args
[2];
1519 args
[0] = LLVMConstInt(ctx
->i32
, msg
, false);
1521 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.sendmsg", ctx
->voidt
, args
, 2, 0);
1525 ac_build_imsb(struct ac_llvm_context
*ctx
,
1527 LLVMTypeRef dst_type
)
1529 LLVMValueRef msb
= ac_build_intrinsic(ctx
, "llvm.amdgcn.sffbh.i32",
1531 AC_FUNC_ATTR_READNONE
);
1533 /* The HW returns the last bit index from MSB, but NIR/TGSI wants
1534 * the index from LSB. Invert it by doing "31 - msb". */
1535 msb
= LLVMBuildSub(ctx
->builder
, LLVMConstInt(ctx
->i32
, 31, false),
1538 LLVMValueRef all_ones
= LLVMConstInt(ctx
->i32
, -1, true);
1539 LLVMValueRef cond
= LLVMBuildOr(ctx
->builder
,
1540 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
1541 arg
, ctx
->i32_0
, ""),
1542 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
,
1543 arg
, all_ones
, ""), "");
1545 return LLVMBuildSelect(ctx
->builder
, cond
, all_ones
, msb
, "");
1549 ac_build_umsb(struct ac_llvm_context
*ctx
,
1551 LLVMTypeRef dst_type
)
1553 const char *intrin_name
;
1555 LLVMValueRef highest_bit
;
1559 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(arg
));
1562 intrin_name
= "llvm.ctlz.i64";
1564 highest_bit
= LLVMConstInt(ctx
->i64
, 63, false);
1568 intrin_name
= "llvm.ctlz.i32";
1570 highest_bit
= LLVMConstInt(ctx
->i32
, 31, false);
1574 intrin_name
= "llvm.ctlz.i16";
1576 highest_bit
= LLVMConstInt(ctx
->i16
, 15, false);
1580 unreachable(!"invalid bitsize");
1584 LLVMValueRef params
[2] = {
1589 LLVMValueRef msb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
1591 AC_FUNC_ATTR_READNONE
);
1593 /* The HW returns the last bit index from MSB, but TGSI/NIR wants
1594 * the index from LSB. Invert it by doing "31 - msb". */
1595 msb
= LLVMBuildSub(ctx
->builder
, highest_bit
, msb
, "");
1596 msb
= LLVMBuildTruncOrBitCast(ctx
->builder
, msb
, ctx
->i32
, "");
1598 /* check for zero */
1599 return LLVMBuildSelect(ctx
->builder
,
1600 LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, arg
, zero
, ""),
1601 LLVMConstInt(ctx
->i32
, -1, true), msb
, "");
1604 LLVMValueRef
ac_build_fmin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
1608 snprintf(name
, sizeof(name
), "llvm.minnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
1609 LLVMValueRef args
[2] = {a
, b
};
1610 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
1611 AC_FUNC_ATTR_READNONE
);
1614 LLVMValueRef
ac_build_fmax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
1618 snprintf(name
, sizeof(name
), "llvm.maxnum.f%d", ac_get_elem_bits(ctx
, LLVMTypeOf(a
)));
1619 LLVMValueRef args
[2] = {a
, b
};
1620 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(a
), args
, 2,
1621 AC_FUNC_ATTR_READNONE
);
1624 LLVMValueRef
ac_build_imin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
1627 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSLE
, a
, b
, "");
1628 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
1631 LLVMValueRef
ac_build_imax(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
1634 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, a
, b
, "");
1635 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
1638 LLVMValueRef
ac_build_umin(struct ac_llvm_context
*ctx
, LLVMValueRef a
,
1641 LLVMValueRef cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntULE
, a
, b
, "");
1642 return LLVMBuildSelect(ctx
->builder
, cmp
, a
, b
, "");
1645 LLVMValueRef
ac_build_clamp(struct ac_llvm_context
*ctx
, LLVMValueRef value
)
1647 LLVMTypeRef t
= LLVMTypeOf(value
);
1648 return ac_build_fmin(ctx
, ac_build_fmax(ctx
, value
, LLVMConstReal(t
, 0.0)),
1649 LLVMConstReal(t
, 1.0));
1652 void ac_build_export(struct ac_llvm_context
*ctx
, struct ac_export_args
*a
)
1654 LLVMValueRef args
[9];
1656 args
[0] = LLVMConstInt(ctx
->i32
, a
->target
, 0);
1657 args
[1] = LLVMConstInt(ctx
->i32
, a
->enabled_channels
, 0);
1660 LLVMTypeRef i16
= LLVMInt16TypeInContext(ctx
->context
);
1661 LLVMTypeRef v2i16
= LLVMVectorType(i16
, 2);
1663 args
[2] = LLVMBuildBitCast(ctx
->builder
, a
->out
[0],
1665 args
[3] = LLVMBuildBitCast(ctx
->builder
, a
->out
[1],
1667 args
[4] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
1668 args
[5] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
1670 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.compr.v2i16",
1671 ctx
->voidt
, args
, 6, 0);
1673 args
[2] = a
->out
[0];
1674 args
[3] = a
->out
[1];
1675 args
[4] = a
->out
[2];
1676 args
[5] = a
->out
[3];
1677 args
[6] = LLVMConstInt(ctx
->i1
, a
->done
, 0);
1678 args
[7] = LLVMConstInt(ctx
->i1
, a
->valid_mask
, 0);
1680 ac_build_intrinsic(ctx
, "llvm.amdgcn.exp.f32",
1681 ctx
->voidt
, args
, 8, 0);
1685 void ac_build_export_null(struct ac_llvm_context
*ctx
)
1687 struct ac_export_args args
;
1689 args
.enabled_channels
= 0x0; /* enabled channels */
1690 args
.valid_mask
= 1; /* whether the EXEC mask is valid */
1691 args
.done
= 1; /* DONE bit */
1692 args
.target
= V_008DFC_SQ_EXP_NULL
;
1693 args
.compr
= 0; /* COMPR flag (0 = 32-bit export) */
1694 args
.out
[0] = LLVMGetUndef(ctx
->f32
); /* R */
1695 args
.out
[1] = LLVMGetUndef(ctx
->f32
); /* G */
1696 args
.out
[2] = LLVMGetUndef(ctx
->f32
); /* B */
1697 args
.out
[3] = LLVMGetUndef(ctx
->f32
); /* A */
1699 ac_build_export(ctx
, &args
);
1702 static unsigned ac_num_coords(enum ac_image_dim dim
)
1708 case ac_image_1darray
:
1712 case ac_image_2darray
:
1713 case ac_image_2dmsaa
:
1715 case ac_image_2darraymsaa
:
1718 unreachable("ac_num_coords: bad dim");
1722 static unsigned ac_num_derivs(enum ac_image_dim dim
)
1726 case ac_image_1darray
:
1729 case ac_image_2darray
:
1734 case ac_image_2dmsaa
:
1735 case ac_image_2darraymsaa
:
1737 unreachable("derivatives not supported");
1741 static const char *get_atomic_name(enum ac_atomic_op op
)
1744 case ac_atomic_swap
: return "swap";
1745 case ac_atomic_add
: return "add";
1746 case ac_atomic_sub
: return "sub";
1747 case ac_atomic_smin
: return "smin";
1748 case ac_atomic_umin
: return "umin";
1749 case ac_atomic_smax
: return "smax";
1750 case ac_atomic_umax
: return "umax";
1751 case ac_atomic_and
: return "and";
1752 case ac_atomic_or
: return "or";
1753 case ac_atomic_xor
: return "xor";
1755 unreachable("bad atomic op");
1758 LLVMValueRef
ac_build_image_opcode(struct ac_llvm_context
*ctx
,
1759 struct ac_image_args
*a
)
1761 const char *overload
[3] = { "", "", "" };
1762 unsigned num_overloads
= 0;
1763 LLVMValueRef args
[18];
1764 unsigned num_args
= 0;
1765 enum ac_image_dim dim
= a
->dim
;
1767 assert(!a
->lod
|| a
->lod
== ctx
->i32_0
|| a
->lod
== ctx
->f32_0
||
1769 assert((a
->opcode
!= ac_image_get_resinfo
&& a
->opcode
!= ac_image_load_mip
&&
1770 a
->opcode
!= ac_image_store_mip
) ||
1772 assert(a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
1773 (!a
->compare
&& !a
->offset
));
1774 assert((a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
||
1775 a
->opcode
== ac_image_get_lod
) ||
1777 assert((a
->bias
? 1 : 0) +
1779 (a
->level_zero
? 1 : 0) +
1780 (a
->derivs
[0] ? 1 : 0) <= 1);
1782 if (a
->opcode
== ac_image_get_lod
) {
1784 case ac_image_1darray
:
1787 case ac_image_2darray
:
1796 bool sample
= a
->opcode
== ac_image_sample
||
1797 a
->opcode
== ac_image_gather4
||
1798 a
->opcode
== ac_image_get_lod
;
1799 bool atomic
= a
->opcode
== ac_image_atomic
||
1800 a
->opcode
== ac_image_atomic_cmpswap
;
1801 LLVMTypeRef coord_type
= sample
? ctx
->f32
: ctx
->i32
;
1803 if (atomic
|| a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
) {
1804 args
[num_args
++] = a
->data
[0];
1805 if (a
->opcode
== ac_image_atomic_cmpswap
)
1806 args
[num_args
++] = a
->data
[1];
1810 args
[num_args
++] = LLVMConstInt(ctx
->i32
, a
->dmask
, false);
1813 args
[num_args
++] = ac_to_integer(ctx
, a
->offset
);
1815 args
[num_args
++] = ac_to_float(ctx
, a
->bias
);
1816 overload
[num_overloads
++] = ".f32";
1819 args
[num_args
++] = ac_to_float(ctx
, a
->compare
);
1821 unsigned count
= ac_num_derivs(dim
);
1822 for (unsigned i
= 0; i
< count
; ++i
)
1823 args
[num_args
++] = ac_to_float(ctx
, a
->derivs
[i
]);
1824 overload
[num_overloads
++] = ".f32";
1826 unsigned num_coords
=
1827 a
->opcode
!= ac_image_get_resinfo
? ac_num_coords(dim
) : 0;
1828 for (unsigned i
= 0; i
< num_coords
; ++i
)
1829 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->coords
[i
], coord_type
, "");
1831 args
[num_args
++] = LLVMBuildBitCast(ctx
->builder
, a
->lod
, coord_type
, "");
1832 overload
[num_overloads
++] = sample
? ".f32" : ".i32";
1834 args
[num_args
++] = a
->resource
;
1836 args
[num_args
++] = a
->sampler
;
1837 args
[num_args
++] = LLVMConstInt(ctx
->i1
, a
->unorm
, false);
1840 args
[num_args
++] = ctx
->i32_0
; /* texfailctrl */
1841 args
[num_args
++] = LLVMConstInt(ctx
->i32
, a
->cache_policy
, false);
1844 const char *atomic_subop
= "";
1845 switch (a
->opcode
) {
1846 case ac_image_sample
: name
= "sample"; break;
1847 case ac_image_gather4
: name
= "gather4"; break;
1848 case ac_image_load
: name
= "load"; break;
1849 case ac_image_load_mip
: name
= "load.mip"; break;
1850 case ac_image_store
: name
= "store"; break;
1851 case ac_image_store_mip
: name
= "store.mip"; break;
1852 case ac_image_atomic
:
1854 atomic_subop
= get_atomic_name(a
->atomic
);
1856 case ac_image_atomic_cmpswap
:
1858 atomic_subop
= "cmpswap";
1860 case ac_image_get_lod
: name
= "getlod"; break;
1861 case ac_image_get_resinfo
: name
= "getresinfo"; break;
1862 default: unreachable("invalid image opcode");
1865 const char *dimname
;
1867 case ac_image_1d
: dimname
= "1d"; break;
1868 case ac_image_2d
: dimname
= "2d"; break;
1869 case ac_image_3d
: dimname
= "3d"; break;
1870 case ac_image_cube
: dimname
= "cube"; break;
1871 case ac_image_1darray
: dimname
= "1darray"; break;
1872 case ac_image_2darray
: dimname
= "2darray"; break;
1873 case ac_image_2dmsaa
: dimname
= "2dmsaa"; break;
1874 case ac_image_2darraymsaa
: dimname
= "2darraymsaa"; break;
1875 default: unreachable("invalid dim");
1879 a
->lod
&& (a
->opcode
== ac_image_sample
|| a
->opcode
== ac_image_gather4
);
1881 snprintf(intr_name
, sizeof(intr_name
),
1882 "llvm.amdgcn.image.%s%s" /* base name */
1883 "%s%s%s" /* sample/gather modifiers */
1884 ".%s.%s%s%s%s", /* dimension and type overloads */
1886 a
->compare
? ".c" : "",
1889 a
->derivs
[0] ? ".d" :
1890 a
->level_zero
? ".lz" : "",
1891 a
->offset
? ".o" : "",
1893 atomic
? "i32" : "v4f32",
1894 overload
[0], overload
[1], overload
[2]);
1899 else if (a
->opcode
== ac_image_store
|| a
->opcode
== ac_image_store_mip
)
1904 LLVMValueRef result
=
1905 ac_build_intrinsic(ctx
, intr_name
, retty
, args
, num_args
,
1907 if (!sample
&& retty
== ctx
->v4f32
) {
1908 result
= LLVMBuildBitCast(ctx
->builder
, result
,
1914 LLVMValueRef
ac_build_cvt_pkrtz_f16(struct ac_llvm_context
*ctx
,
1915 LLVMValueRef args
[2])
1918 LLVMVectorType(LLVMHalfTypeInContext(ctx
->context
), 2);
1920 return ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pkrtz", v2f16
,
1921 args
, 2, AC_FUNC_ATTR_READNONE
);
1924 LLVMValueRef
ac_build_cvt_pknorm_i16(struct ac_llvm_context
*ctx
,
1925 LLVMValueRef args
[2])
1928 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.i16",
1929 ctx
->v2i16
, args
, 2,
1930 AC_FUNC_ATTR_READNONE
);
1931 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
1934 LLVMValueRef
ac_build_cvt_pknorm_u16(struct ac_llvm_context
*ctx
,
1935 LLVMValueRef args
[2])
1938 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pknorm.u16",
1939 ctx
->v2i16
, args
, 2,
1940 AC_FUNC_ATTR_READNONE
);
1941 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
1944 /* The 8-bit and 10-bit clamping is for HW workarounds. */
1945 LLVMValueRef
ac_build_cvt_pk_i16(struct ac_llvm_context
*ctx
,
1946 LLVMValueRef args
[2], unsigned bits
, bool hi
)
1948 assert(bits
== 8 || bits
== 10 || bits
== 16);
1950 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
1951 bits
== 8 ? 127 : bits
== 10 ? 511 : 32767, 0);
1952 LLVMValueRef min_rgb
= LLVMConstInt(ctx
->i32
,
1953 bits
== 8 ? -128 : bits
== 10 ? -512 : -32768, 0);
1954 LLVMValueRef max_alpha
=
1955 bits
!= 10 ? max_rgb
: ctx
->i32_1
;
1956 LLVMValueRef min_alpha
=
1957 bits
!= 10 ? min_rgb
: LLVMConstInt(ctx
->i32
, -2, 0);
1961 for (int i
= 0; i
< 2; i
++) {
1962 bool alpha
= hi
&& i
== 1;
1963 args
[i
] = ac_build_imin(ctx
, args
[i
],
1964 alpha
? max_alpha
: max_rgb
);
1965 args
[i
] = ac_build_imax(ctx
, args
[i
],
1966 alpha
? min_alpha
: min_rgb
);
1971 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.i16",
1972 ctx
->v2i16
, args
, 2,
1973 AC_FUNC_ATTR_READNONE
);
1974 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
1977 /* The 8-bit and 10-bit clamping is for HW workarounds. */
1978 LLVMValueRef
ac_build_cvt_pk_u16(struct ac_llvm_context
*ctx
,
1979 LLVMValueRef args
[2], unsigned bits
, bool hi
)
1981 assert(bits
== 8 || bits
== 10 || bits
== 16);
1983 LLVMValueRef max_rgb
= LLVMConstInt(ctx
->i32
,
1984 bits
== 8 ? 255 : bits
== 10 ? 1023 : 65535, 0);
1985 LLVMValueRef max_alpha
=
1986 bits
!= 10 ? max_rgb
: LLVMConstInt(ctx
->i32
, 3, 0);
1990 for (int i
= 0; i
< 2; i
++) {
1991 bool alpha
= hi
&& i
== 1;
1992 args
[i
] = ac_build_umin(ctx
, args
[i
],
1993 alpha
? max_alpha
: max_rgb
);
1998 ac_build_intrinsic(ctx
, "llvm.amdgcn.cvt.pk.u16",
1999 ctx
->v2i16
, args
, 2,
2000 AC_FUNC_ATTR_READNONE
);
2001 return LLVMBuildBitCast(ctx
->builder
, res
, ctx
->i32
, "");
2004 LLVMValueRef
ac_build_wqm_vote(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2006 return ac_build_intrinsic(ctx
, "llvm.amdgcn.wqm.vote", ctx
->i1
,
2007 &i1
, 1, AC_FUNC_ATTR_READNONE
);
2010 void ac_build_kill_if_false(struct ac_llvm_context
*ctx
, LLVMValueRef i1
)
2012 ac_build_intrinsic(ctx
, "llvm.amdgcn.kill", ctx
->voidt
,
2016 LLVMValueRef
ac_build_bfe(struct ac_llvm_context
*ctx
, LLVMValueRef input
,
2017 LLVMValueRef offset
, LLVMValueRef width
,
2020 LLVMValueRef args
[] = {
2026 return ac_build_intrinsic(ctx
,
2027 is_signed
? "llvm.amdgcn.sbfe.i32" :
2028 "llvm.amdgcn.ubfe.i32",
2030 AC_FUNC_ATTR_READNONE
);
2033 LLVMValueRef
ac_build_imad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2034 LLVMValueRef s1
, LLVMValueRef s2
)
2036 return LLVMBuildAdd(ctx
->builder
,
2037 LLVMBuildMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2040 LLVMValueRef
ac_build_fmad(struct ac_llvm_context
*ctx
, LLVMValueRef s0
,
2041 LLVMValueRef s1
, LLVMValueRef s2
)
2043 return LLVMBuildFAdd(ctx
->builder
,
2044 LLVMBuildFMul(ctx
->builder
, s0
, s1
, ""), s2
, "");
2047 void ac_build_waitcnt(struct ac_llvm_context
*ctx
, unsigned simm16
)
2049 LLVMValueRef args
[1] = {
2050 LLVMConstInt(ctx
->i32
, simm16
, false),
2052 ac_build_intrinsic(ctx
, "llvm.amdgcn.s.waitcnt",
2053 ctx
->voidt
, args
, 1, 0);
2056 LLVMValueRef
ac_build_fract(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2062 if (bitsize
== 32) {
2063 intr
= "llvm.floor.f32";
2066 intr
= "llvm.floor.f64";
2070 LLVMValueRef params
[] = {
2073 LLVMValueRef floor
= ac_build_intrinsic(ctx
, intr
, type
, params
, 1,
2074 AC_FUNC_ATTR_READNONE
);
2075 return LLVMBuildFSub(ctx
->builder
, src0
, floor
, "");
2078 LLVMValueRef
ac_build_isign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2081 LLVMTypeRef type
= LLVMIntTypeInContext(ctx
->context
, bitsize
);
2082 LLVMValueRef zero
= LLVMConstInt(type
, 0, false);
2083 LLVMValueRef one
= LLVMConstInt(type
, 1, false);
2085 LLVMValueRef cmp
, val
;
2086 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, src0
, zero
, "");
2087 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2088 cmp
= LLVMBuildICmp(ctx
->builder
, LLVMIntSGE
, val
, zero
, "");
2089 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstInt(type
, -1, true), "");
2093 LLVMValueRef
ac_build_fsign(struct ac_llvm_context
*ctx
, LLVMValueRef src0
,
2096 LLVMValueRef cmp
, val
, zero
, one
;
2099 if (bitsize
== 32) {
2109 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGT
, src0
, zero
, "");
2110 val
= LLVMBuildSelect(ctx
->builder
, cmp
, one
, src0
, "");
2111 cmp
= LLVMBuildFCmp(ctx
->builder
, LLVMRealOGE
, val
, zero
, "");
2112 val
= LLVMBuildSelect(ctx
->builder
, cmp
, val
, LLVMConstReal(type
, -1.0), "");
2116 LLVMValueRef
ac_build_bit_count(struct ac_llvm_context
*ctx
, LLVMValueRef src0
)
2118 LLVMValueRef result
;
2121 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2125 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i64", ctx
->i64
,
2126 (LLVMValueRef
[]) { src0
}, 1,
2127 AC_FUNC_ATTR_READNONE
);
2129 result
= LLVMBuildTrunc(ctx
->builder
, result
, ctx
->i32
, "");
2132 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i32", ctx
->i32
,
2133 (LLVMValueRef
[]) { src0
}, 1,
2134 AC_FUNC_ATTR_READNONE
);
2137 result
= ac_build_intrinsic(ctx
, "llvm.ctpop.i16", ctx
->i16
,
2138 (LLVMValueRef
[]) { src0
}, 1,
2139 AC_FUNC_ATTR_READNONE
);
2142 unreachable(!"invalid bitsize");
2149 LLVMValueRef
ac_build_bitfield_reverse(struct ac_llvm_context
*ctx
,
2152 LLVMValueRef result
;
2155 bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2159 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i32", ctx
->i32
,
2160 (LLVMValueRef
[]) { src0
}, 1,
2161 AC_FUNC_ATTR_READNONE
);
2164 result
= ac_build_intrinsic(ctx
, "llvm.bitreverse.i16", ctx
->i16
,
2165 (LLVMValueRef
[]) { src0
}, 1,
2166 AC_FUNC_ATTR_READNONE
);
2169 unreachable(!"invalid bitsize");
2176 #define AC_EXP_TARGET 0
2177 #define AC_EXP_ENABLED_CHANNELS 1
2178 #define AC_EXP_OUT0 2
2186 struct ac_vs_exp_chan
2190 enum ac_ir_type type
;
2193 struct ac_vs_exp_inst
{
2196 struct ac_vs_exp_chan chan
[4];
2199 struct ac_vs_exports
{
2201 struct ac_vs_exp_inst exp
[VARYING_SLOT_MAX
];
2204 /* Return true if the PARAM export has been eliminated. */
2205 static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset
,
2206 uint32_t num_outputs
,
2207 struct ac_vs_exp_inst
*exp
)
2209 unsigned i
, default_val
; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */
2210 bool is_zero
[4] = {}, is_one
[4] = {};
2212 for (i
= 0; i
< 4; i
++) {
2213 /* It's a constant expression. Undef outputs are eliminated too. */
2214 if (exp
->chan
[i
].type
== AC_IR_UNDEF
) {
2217 } else if (exp
->chan
[i
].type
== AC_IR_CONST
) {
2218 if (exp
->chan
[i
].const_float
== 0)
2220 else if (exp
->chan
[i
].const_float
== 1)
2223 return false; /* other constant */
2228 /* Only certain combinations of 0 and 1 can be eliminated. */
2229 if (is_zero
[0] && is_zero
[1] && is_zero
[2])
2230 default_val
= is_zero
[3] ? 0 : 1;
2231 else if (is_one
[0] && is_one
[1] && is_one
[2])
2232 default_val
= is_zero
[3] ? 2 : 3;
2236 /* The PARAM export can be represented as DEFAULT_VAL. Kill it. */
2237 LLVMInstructionEraseFromParent(exp
->inst
);
2239 /* Change OFFSET to DEFAULT_VAL. */
2240 for (i
= 0; i
< num_outputs
; i
++) {
2241 if (vs_output_param_offset
[i
] == exp
->offset
) {
2242 vs_output_param_offset
[i
] =
2243 AC_EXP_PARAM_DEFAULT_VAL_0000
+ default_val
;
2250 static bool ac_eliminate_duplicated_output(struct ac_llvm_context
*ctx
,
2251 uint8_t *vs_output_param_offset
,
2252 uint32_t num_outputs
,
2253 struct ac_vs_exports
*processed
,
2254 struct ac_vs_exp_inst
*exp
)
2256 unsigned p
, copy_back_channels
= 0;
2258 /* See if the output is already in the list of processed outputs.
2259 * The LLVMValueRef comparison relies on SSA.
2261 for (p
= 0; p
< processed
->num
; p
++) {
2262 bool different
= false;
2264 for (unsigned j
= 0; j
< 4; j
++) {
2265 struct ac_vs_exp_chan
*c1
= &processed
->exp
[p
].chan
[j
];
2266 struct ac_vs_exp_chan
*c2
= &exp
->chan
[j
];
2268 /* Treat undef as a match. */
2269 if (c2
->type
== AC_IR_UNDEF
)
2272 /* If c1 is undef but c2 isn't, we can copy c2 to c1
2273 * and consider the instruction duplicated.
2275 if (c1
->type
== AC_IR_UNDEF
) {
2276 copy_back_channels
|= 1 << j
;
2280 /* Test whether the channels are not equal. */
2281 if (c1
->type
!= c2
->type
||
2282 (c1
->type
== AC_IR_CONST
&&
2283 c1
->const_float
!= c2
->const_float
) ||
2284 (c1
->type
== AC_IR_VALUE
&&
2285 c1
->value
!= c2
->value
)) {
2293 copy_back_channels
= 0;
2295 if (p
== processed
->num
)
2298 /* If a match was found, but the matching export has undef where the new
2299 * one has a normal value, copy the normal value to the undef channel.
2301 struct ac_vs_exp_inst
*match
= &processed
->exp
[p
];
2303 /* Get current enabled channels mask. */
2304 LLVMValueRef arg
= LLVMGetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
);
2305 unsigned enabled_channels
= LLVMConstIntGetZExtValue(arg
);
2307 while (copy_back_channels
) {
2308 unsigned chan
= u_bit_scan(©_back_channels
);
2310 assert(match
->chan
[chan
].type
== AC_IR_UNDEF
);
2311 LLVMSetOperand(match
->inst
, AC_EXP_OUT0
+ chan
,
2312 exp
->chan
[chan
].value
);
2313 match
->chan
[chan
] = exp
->chan
[chan
];
2315 /* Update number of enabled channels because the original mask
2316 * is not always 0xf.
2318 enabled_channels
|= (1 << chan
);
2319 LLVMSetOperand(match
->inst
, AC_EXP_ENABLED_CHANNELS
,
2320 LLVMConstInt(ctx
->i32
, enabled_channels
, 0));
2323 /* The PARAM export is duplicated. Kill it. */
2324 LLVMInstructionEraseFromParent(exp
->inst
);
2326 /* Change OFFSET to the matching export. */
2327 for (unsigned i
= 0; i
< num_outputs
; i
++) {
2328 if (vs_output_param_offset
[i
] == exp
->offset
) {
2329 vs_output_param_offset
[i
] = match
->offset
;
2336 void ac_optimize_vs_outputs(struct ac_llvm_context
*ctx
,
2337 LLVMValueRef main_fn
,
2338 uint8_t *vs_output_param_offset
,
2339 uint32_t num_outputs
,
2340 uint8_t *num_param_exports
)
2342 LLVMBasicBlockRef bb
;
2343 bool removed_any
= false;
2344 struct ac_vs_exports exports
;
2348 /* Process all LLVM instructions. */
2349 bb
= LLVMGetFirstBasicBlock(main_fn
);
2351 LLVMValueRef inst
= LLVMGetFirstInstruction(bb
);
2354 LLVMValueRef cur
= inst
;
2355 inst
= LLVMGetNextInstruction(inst
);
2356 struct ac_vs_exp_inst exp
;
2358 if (LLVMGetInstructionOpcode(cur
) != LLVMCall
)
2361 LLVMValueRef callee
= ac_llvm_get_called_value(cur
);
2363 if (!ac_llvm_is_function(callee
))
2366 const char *name
= LLVMGetValueName(callee
);
2367 unsigned num_args
= LLVMCountParams(callee
);
2369 /* Check if this is an export instruction. */
2370 if ((num_args
!= 9 && num_args
!= 8) ||
2371 (strcmp(name
, "llvm.SI.export") &&
2372 strcmp(name
, "llvm.amdgcn.exp.f32")))
2375 LLVMValueRef arg
= LLVMGetOperand(cur
, AC_EXP_TARGET
);
2376 unsigned target
= LLVMConstIntGetZExtValue(arg
);
2378 if (target
< V_008DFC_SQ_EXP_PARAM
)
2381 target
-= V_008DFC_SQ_EXP_PARAM
;
2383 /* Parse the instruction. */
2384 memset(&exp
, 0, sizeof(exp
));
2385 exp
.offset
= target
;
2388 for (unsigned i
= 0; i
< 4; i
++) {
2389 LLVMValueRef v
= LLVMGetOperand(cur
, AC_EXP_OUT0
+ i
);
2391 exp
.chan
[i
].value
= v
;
2393 if (LLVMIsUndef(v
)) {
2394 exp
.chan
[i
].type
= AC_IR_UNDEF
;
2395 } else if (LLVMIsAConstantFP(v
)) {
2396 LLVMBool loses_info
;
2397 exp
.chan
[i
].type
= AC_IR_CONST
;
2398 exp
.chan
[i
].const_float
=
2399 LLVMConstRealGetDouble(v
, &loses_info
);
2401 exp
.chan
[i
].type
= AC_IR_VALUE
;
2405 /* Eliminate constant and duplicated PARAM exports. */
2406 if (ac_eliminate_const_output(vs_output_param_offset
,
2407 num_outputs
, &exp
) ||
2408 ac_eliminate_duplicated_output(ctx
,
2409 vs_output_param_offset
,
2410 num_outputs
, &exports
,
2414 exports
.exp
[exports
.num
++] = exp
;
2417 bb
= LLVMGetNextBasicBlock(bb
);
2420 /* Remove holes in export memory due to removed PARAM exports.
2421 * This is done by renumbering all PARAM exports.
2424 uint8_t old_offset
[VARYING_SLOT_MAX
];
2427 /* Make a copy of the offsets. We need the old version while
2428 * we are modifying some of them. */
2429 memcpy(old_offset
, vs_output_param_offset
,
2430 sizeof(old_offset
));
2432 for (i
= 0; i
< exports
.num
; i
++) {
2433 unsigned offset
= exports
.exp
[i
].offset
;
2435 /* Update vs_output_param_offset. Multiple outputs can
2436 * have the same offset.
2438 for (out
= 0; out
< num_outputs
; out
++) {
2439 if (old_offset
[out
] == offset
)
2440 vs_output_param_offset
[out
] = i
;
2443 /* Change the PARAM offset in the instruction. */
2444 LLVMSetOperand(exports
.exp
[i
].inst
, AC_EXP_TARGET
,
2445 LLVMConstInt(ctx
->i32
,
2446 V_008DFC_SQ_EXP_PARAM
+ i
, 0));
2448 *num_param_exports
= exports
.num
;
2452 void ac_init_exec_full_mask(struct ac_llvm_context
*ctx
)
2454 LLVMValueRef full_mask
= LLVMConstInt(ctx
->i64
, ~0ull, 0);
2455 ac_build_intrinsic(ctx
,
2456 "llvm.amdgcn.init.exec", ctx
->voidt
,
2457 &full_mask
, 1, AC_FUNC_ATTR_CONVERGENT
);
2460 void ac_declare_lds_as_pointer(struct ac_llvm_context
*ctx
)
2462 unsigned lds_size
= ctx
->chip_class
>= CIK
? 65536 : 32768;
2463 ctx
->lds
= LLVMBuildIntToPtr(ctx
->builder
, ctx
->i32_0
,
2464 LLVMPointerType(LLVMArrayType(ctx
->i32
, lds_size
/ 4), AC_ADDR_SPACE_LDS
),
2468 LLVMValueRef
ac_lds_load(struct ac_llvm_context
*ctx
,
2469 LLVMValueRef dw_addr
)
2471 return ac_build_load(ctx
, ctx
->lds
, dw_addr
);
2474 void ac_lds_store(struct ac_llvm_context
*ctx
,
2475 LLVMValueRef dw_addr
,
2478 value
= ac_to_integer(ctx
, value
);
2479 ac_build_indexed_store(ctx
, ctx
->lds
,
2483 LLVMValueRef
ac_find_lsb(struct ac_llvm_context
*ctx
,
2484 LLVMTypeRef dst_type
,
2487 unsigned src0_bitsize
= ac_get_elem_bits(ctx
, LLVMTypeOf(src0
));
2488 const char *intrin_name
;
2492 switch (src0_bitsize
) {
2494 intrin_name
= "llvm.cttz.i64";
2499 intrin_name
= "llvm.cttz.i32";
2504 intrin_name
= "llvm.cttz.i16";
2509 unreachable(!"invalid bitsize");
2512 LLVMValueRef params
[2] = {
2515 /* The value of 1 means that ffs(x=0) = undef, so LLVM won't
2516 * add special code to check for x=0. The reason is that
2517 * the LLVM behavior for x=0 is different from what we
2518 * need here. However, LLVM also assumes that ffs(x) is
2519 * in [0, 31], but GLSL expects that ffs(0) = -1, so
2520 * a conditional assignment to handle 0 is still required.
2522 * The hardware already implements the correct behavior.
2527 LLVMValueRef lsb
= ac_build_intrinsic(ctx
, intrin_name
, type
,
2529 AC_FUNC_ATTR_READNONE
);
2531 if (src0_bitsize
== 64) {
2532 lsb
= LLVMBuildTrunc(ctx
->builder
, lsb
, ctx
->i32
, "");
2535 /* TODO: We need an intrinsic to skip this conditional. */
2536 /* Check for zero: */
2537 return LLVMBuildSelect(ctx
->builder
, LLVMBuildICmp(ctx
->builder
,
2540 LLVMConstInt(ctx
->i32
, -1, 0), lsb
, "");
2543 LLVMTypeRef
ac_array_in_const_addr_space(LLVMTypeRef elem_type
)
2545 return LLVMPointerType(LLVMArrayType(elem_type
, 0),
2546 AC_ADDR_SPACE_CONST
);
2549 LLVMTypeRef
ac_array_in_const32_addr_space(LLVMTypeRef elem_type
)
2551 return LLVMPointerType(LLVMArrayType(elem_type
, 0),
2552 AC_ADDR_SPACE_CONST_32BIT
);
2555 static struct ac_llvm_flow
*
2556 get_current_flow(struct ac_llvm_context
*ctx
)
2558 if (ctx
->flow_depth
> 0)
2559 return &ctx
->flow
[ctx
->flow_depth
- 1];
2563 static struct ac_llvm_flow
*
2564 get_innermost_loop(struct ac_llvm_context
*ctx
)
2566 for (unsigned i
= ctx
->flow_depth
; i
> 0; --i
) {
2567 if (ctx
->flow
[i
- 1].loop_entry_block
)
2568 return &ctx
->flow
[i
- 1];
2573 static struct ac_llvm_flow
*
2574 push_flow(struct ac_llvm_context
*ctx
)
2576 struct ac_llvm_flow
*flow
;
2578 if (ctx
->flow_depth
>= ctx
->flow_depth_max
) {
2579 unsigned new_max
= MAX2(ctx
->flow_depth
<< 1,
2580 AC_LLVM_INITIAL_CF_DEPTH
);
2582 ctx
->flow
= realloc(ctx
->flow
, new_max
* sizeof(*ctx
->flow
));
2583 ctx
->flow_depth_max
= new_max
;
2586 flow
= &ctx
->flow
[ctx
->flow_depth
];
2589 flow
->next_block
= NULL
;
2590 flow
->loop_entry_block
= NULL
;
2594 static void set_basicblock_name(LLVMBasicBlockRef bb
, const char *base
,
2598 snprintf(buf
, sizeof(buf
), "%s%d", base
, label_id
);
2599 LLVMSetValueName(LLVMBasicBlockAsValue(bb
), buf
);
2602 /* Append a basic block at the level of the parent flow.
2604 static LLVMBasicBlockRef
append_basic_block(struct ac_llvm_context
*ctx
,
2607 assert(ctx
->flow_depth
>= 1);
2609 if (ctx
->flow_depth
>= 2) {
2610 struct ac_llvm_flow
*flow
= &ctx
->flow
[ctx
->flow_depth
- 2];
2612 return LLVMInsertBasicBlockInContext(ctx
->context
,
2613 flow
->next_block
, name
);
2616 LLVMValueRef main_fn
=
2617 LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx
->builder
));
2618 return LLVMAppendBasicBlockInContext(ctx
->context
, main_fn
, name
);
2621 /* Emit a branch to the given default target for the current block if
2622 * applicable -- that is, if the current block does not already contain a
2623 * branch from a break or continue.
2625 static void emit_default_branch(LLVMBuilderRef builder
,
2626 LLVMBasicBlockRef target
)
2628 if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder
)))
2629 LLVMBuildBr(builder
, target
);
2632 void ac_build_bgnloop(struct ac_llvm_context
*ctx
, int label_id
)
2634 struct ac_llvm_flow
*flow
= push_flow(ctx
);
2635 flow
->loop_entry_block
= append_basic_block(ctx
, "LOOP");
2636 flow
->next_block
= append_basic_block(ctx
, "ENDLOOP");
2637 set_basicblock_name(flow
->loop_entry_block
, "loop", label_id
);
2638 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
2639 LLVMPositionBuilderAtEnd(ctx
->builder
, flow
->loop_entry_block
);
2642 void ac_build_break(struct ac_llvm_context
*ctx
)
2644 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
2645 LLVMBuildBr(ctx
->builder
, flow
->next_block
);
2648 void ac_build_continue(struct ac_llvm_context
*ctx
)
2650 struct ac_llvm_flow
*flow
= get_innermost_loop(ctx
);
2651 LLVMBuildBr(ctx
->builder
, flow
->loop_entry_block
);
2654 void ac_build_else(struct ac_llvm_context
*ctx
, int label_id
)
2656 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
2657 LLVMBasicBlockRef endif_block
;
2659 assert(!current_branch
->loop_entry_block
);
2661 endif_block
= append_basic_block(ctx
, "ENDIF");
2662 emit_default_branch(ctx
->builder
, endif_block
);
2664 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
2665 set_basicblock_name(current_branch
->next_block
, "else", label_id
);
2667 current_branch
->next_block
= endif_block
;
2670 void ac_build_endif(struct ac_llvm_context
*ctx
, int label_id
)
2672 struct ac_llvm_flow
*current_branch
= get_current_flow(ctx
);
2674 assert(!current_branch
->loop_entry_block
);
2676 emit_default_branch(ctx
->builder
, current_branch
->next_block
);
2677 LLVMPositionBuilderAtEnd(ctx
->builder
, current_branch
->next_block
);
2678 set_basicblock_name(current_branch
->next_block
, "endif", label_id
);
2683 void ac_build_endloop(struct ac_llvm_context
*ctx
, int label_id
)
2685 struct ac_llvm_flow
*current_loop
= get_current_flow(ctx
);
2687 assert(current_loop
->loop_entry_block
);
2689 emit_default_branch(ctx
->builder
, current_loop
->loop_entry_block
);
2691 LLVMPositionBuilderAtEnd(ctx
->builder
, current_loop
->next_block
);
2692 set_basicblock_name(current_loop
->next_block
, "endloop", label_id
);
2696 void ac_build_ifcc(struct ac_llvm_context
*ctx
, LLVMValueRef cond
, int label_id
)
2698 struct ac_llvm_flow
*flow
= push_flow(ctx
);
2699 LLVMBasicBlockRef if_block
;
2701 if_block
= append_basic_block(ctx
, "IF");
2702 flow
->next_block
= append_basic_block(ctx
, "ELSE");
2703 set_basicblock_name(if_block
, "if", label_id
);
2704 LLVMBuildCondBr(ctx
->builder
, cond
, if_block
, flow
->next_block
);
2705 LLVMPositionBuilderAtEnd(ctx
->builder
, if_block
);
2708 void ac_build_if(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
2711 LLVMValueRef cond
= LLVMBuildFCmp(ctx
->builder
, LLVMRealUNE
,
2712 value
, ctx
->f32_0
, "");
2713 ac_build_ifcc(ctx
, cond
, label_id
);
2716 void ac_build_uif(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
2719 LLVMValueRef cond
= LLVMBuildICmp(ctx
->builder
, LLVMIntNE
,
2720 ac_to_integer(ctx
, value
),
2722 ac_build_ifcc(ctx
, cond
, label_id
);
2725 LLVMValueRef
ac_build_alloca_undef(struct ac_llvm_context
*ac
, LLVMTypeRef type
,
2728 LLVMBuilderRef builder
= ac
->builder
;
2729 LLVMBasicBlockRef current_block
= LLVMGetInsertBlock(builder
);
2730 LLVMValueRef function
= LLVMGetBasicBlockParent(current_block
);
2731 LLVMBasicBlockRef first_block
= LLVMGetEntryBasicBlock(function
);
2732 LLVMValueRef first_instr
= LLVMGetFirstInstruction(first_block
);
2733 LLVMBuilderRef first_builder
= LLVMCreateBuilderInContext(ac
->context
);
2737 LLVMPositionBuilderBefore(first_builder
, first_instr
);
2739 LLVMPositionBuilderAtEnd(first_builder
, first_block
);
2742 res
= LLVMBuildAlloca(first_builder
, type
, name
);
2743 LLVMDisposeBuilder(first_builder
);
2747 LLVMValueRef
ac_build_alloca(struct ac_llvm_context
*ac
,
2748 LLVMTypeRef type
, const char *name
)
2750 LLVMValueRef ptr
= ac_build_alloca_undef(ac
, type
, name
);
2751 LLVMBuildStore(ac
->builder
, LLVMConstNull(type
), ptr
);
2755 LLVMValueRef
ac_cast_ptr(struct ac_llvm_context
*ctx
, LLVMValueRef ptr
,
2758 int addr_space
= LLVMGetPointerAddressSpace(LLVMTypeOf(ptr
));
2759 return LLVMBuildBitCast(ctx
->builder
, ptr
,
2760 LLVMPointerType(type
, addr_space
), "");
2763 LLVMValueRef
ac_trim_vector(struct ac_llvm_context
*ctx
, LLVMValueRef value
,
2766 unsigned num_components
= ac_get_llvm_num_components(value
);
2767 if (count
== num_components
)
2770 LLVMValueRef masks
[MAX2(count
, 2)];
2771 masks
[0] = ctx
->i32_0
;
2772 masks
[1] = ctx
->i32_1
;
2773 for (unsigned i
= 2; i
< count
; i
++)
2774 masks
[i
] = LLVMConstInt(ctx
->i32
, i
, false);
2777 return LLVMBuildExtractElement(ctx
->builder
, value
, masks
[0],
2780 LLVMValueRef swizzle
= LLVMConstVector(masks
, count
);
2781 return LLVMBuildShuffleVector(ctx
->builder
, value
, value
, swizzle
, "");
2784 LLVMValueRef
ac_unpack_param(struct ac_llvm_context
*ctx
, LLVMValueRef param
,
2785 unsigned rshift
, unsigned bitwidth
)
2787 LLVMValueRef value
= param
;
2789 value
= LLVMBuildLShr(ctx
->builder
, value
,
2790 LLVMConstInt(ctx
->i32
, rshift
, false), "");
2792 if (rshift
+ bitwidth
< 32) {
2793 unsigned mask
= (1 << bitwidth
) - 1;
2794 value
= LLVMBuildAnd(ctx
->builder
, value
,
2795 LLVMConstInt(ctx
->i32
, mask
, false), "");
2800 /* Adjust the sample index according to FMASK.
2802 * For uncompressed MSAA surfaces, FMASK should return 0x76543210,
2803 * which is the identity mapping. Each nibble says which physical sample
2804 * should be fetched to get that sample.
2806 * For example, 0x11111100 means there are only 2 samples stored and
2807 * the second sample covers 3/4 of the pixel. When reading samples 0
2808 * and 1, return physical sample 0 (determined by the first two 0s
2809 * in FMASK), otherwise return physical sample 1.
2811 * The sample index should be adjusted as follows:
2812 * addr[sample_index] = (fmask >> (addr[sample_index] * 4)) & 0xF;
2814 void ac_apply_fmask_to_sample(struct ac_llvm_context
*ac
, LLVMValueRef fmask
,
2815 LLVMValueRef
*addr
, bool is_array_tex
)
2817 struct ac_image_args fmask_load
= {};
2818 fmask_load
.opcode
= ac_image_load
;
2819 fmask_load
.resource
= fmask
;
2820 fmask_load
.dmask
= 0xf;
2821 fmask_load
.dim
= is_array_tex
? ac_image_2darray
: ac_image_2d
;
2823 fmask_load
.coords
[0] = addr
[0];
2824 fmask_load
.coords
[1] = addr
[1];
2826 fmask_load
.coords
[2] = addr
[2];
2828 LLVMValueRef fmask_value
= ac_build_image_opcode(ac
, &fmask_load
);
2829 fmask_value
= LLVMBuildExtractElement(ac
->builder
, fmask_value
,
2832 /* Apply the formula. */
2833 unsigned sample_chan
= is_array_tex
? 3 : 2;
2834 LLVMValueRef final_sample
;
2835 final_sample
= LLVMBuildMul(ac
->builder
, addr
[sample_chan
],
2836 LLVMConstInt(ac
->i32
, 4, 0), "");
2837 final_sample
= LLVMBuildLShr(ac
->builder
, fmask_value
, final_sample
, "");
2838 /* Mask the sample index by 0x7, because 0x8 means an unknown value
2839 * with EQAA, so those will map to 0. */
2840 final_sample
= LLVMBuildAnd(ac
->builder
, final_sample
,
2841 LLVMConstInt(ac
->i32
, 0x7, 0), "");
2843 /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK
2844 * resource descriptor is 0 (invalid).
2847 tmp
= LLVMBuildBitCast(ac
->builder
, fmask
, ac
->v8i32
, "");
2848 tmp
= LLVMBuildExtractElement(ac
->builder
, tmp
, ac
->i32_1
, "");
2849 tmp
= LLVMBuildICmp(ac
->builder
, LLVMIntNE
, tmp
, ac
->i32_0
, "");
2851 /* Replace the MSAA sample index. */
2852 addr
[sample_chan
] = LLVMBuildSelect(ac
->builder
, tmp
, final_sample
,
2853 addr
[sample_chan
], "");
2857 _ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
2859 ac_build_optimization_barrier(ctx
, &src
);
2860 return ac_build_intrinsic(ctx
,
2861 lane
== NULL
? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane",
2862 LLVMTypeOf(src
), (LLVMValueRef
[]) {
2864 lane
== NULL
? 1 : 2,
2865 AC_FUNC_ATTR_READNONE
|
2866 AC_FUNC_ATTR_CONVERGENT
);
2870 * Builds the "llvm.amdgcn.readlane" or "llvm.amdgcn.readfirstlane" intrinsic.
2873 * @param lane - id of the lane or NULL for the first active lane
2874 * @return value of the lane
2877 ac_build_readlane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef lane
)
2879 LLVMTypeRef src_type
= LLVMTypeOf(src
);
2880 src
= ac_to_integer(ctx
, src
);
2881 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
2885 ret
= _ac_build_readlane(ctx
, src
, lane
);
2887 assert(bits
% 32 == 0);
2888 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
2889 LLVMValueRef src_vector
=
2890 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
2891 ret
= LLVMGetUndef(vec_type
);
2892 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
2893 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
2894 LLVMConstInt(ctx
->i32
, i
, 0), "");
2895 LLVMValueRef ret_comp
= _ac_build_readlane(ctx
, src
, lane
);
2896 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
, ret_comp
,
2897 LLVMConstInt(ctx
->i32
, i
, 0), "");
2900 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
2904 ac_build_writelane(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef value
, LLVMValueRef lane
)
2906 /* TODO: Use the actual instruction when LLVM adds an intrinsic for it.
2908 LLVMValueRef pred
= LLVMBuildICmp(ctx
->builder
, LLVMIntEQ
, lane
,
2909 ac_get_thread_id(ctx
), "");
2910 return LLVMBuildSelect(ctx
->builder
, pred
, value
, src
, "");
2914 ac_build_mbcnt(struct ac_llvm_context
*ctx
, LLVMValueRef mask
)
2916 LLVMValueRef mask_vec
= LLVMBuildBitCast(ctx
->builder
, mask
,
2917 LLVMVectorType(ctx
->i32
, 2),
2919 LLVMValueRef mask_lo
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
2921 LLVMValueRef mask_hi
= LLVMBuildExtractElement(ctx
->builder
, mask_vec
,
2924 ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.lo", ctx
->i32
,
2925 (LLVMValueRef
[]) { mask_lo
, ctx
->i32_0
},
2926 2, AC_FUNC_ATTR_READNONE
);
2927 val
= ac_build_intrinsic(ctx
, "llvm.amdgcn.mbcnt.hi", ctx
->i32
,
2928 (LLVMValueRef
[]) { mask_hi
, val
},
2929 2, AC_FUNC_ATTR_READNONE
);
2934 _dpp_quad_perm
= 0x000,
2935 _dpp_row_sl
= 0x100,
2936 _dpp_row_sr
= 0x110,
2937 _dpp_row_rr
= 0x120,
2942 dpp_row_mirror
= 0x140,
2943 dpp_row_half_mirror
= 0x141,
2944 dpp_row_bcast15
= 0x142,
2945 dpp_row_bcast31
= 0x143
2948 static inline enum dpp_ctrl
2949 dpp_quad_perm(unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
2951 assert(lane0
< 4 && lane1
< 4 && lane2
< 4 && lane3
< 4);
2952 return _dpp_quad_perm
| lane0
| (lane1
<< 2) | (lane2
<< 4) | (lane3
<< 6);
2955 static inline enum dpp_ctrl
2956 dpp_row_sl(unsigned amount
)
2958 assert(amount
> 0 && amount
< 16);
2959 return _dpp_row_sl
| amount
;
2962 static inline enum dpp_ctrl
2963 dpp_row_sr(unsigned amount
)
2965 assert(amount
> 0 && amount
< 16);
2966 return _dpp_row_sr
| amount
;
2970 _ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
2971 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
2974 return ac_build_intrinsic(ctx
, "llvm.amdgcn.update.dpp.i32",
2978 LLVMConstInt(ctx
->i32
, dpp_ctrl
, 0),
2979 LLVMConstInt(ctx
->i32
, row_mask
, 0),
2980 LLVMConstInt(ctx
->i32
, bank_mask
, 0),
2981 LLVMConstInt(ctx
->i1
, bound_ctrl
, 0) },
2982 6, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
2986 ac_build_dpp(struct ac_llvm_context
*ctx
, LLVMValueRef old
, LLVMValueRef src
,
2987 enum dpp_ctrl dpp_ctrl
, unsigned row_mask
, unsigned bank_mask
,
2990 LLVMTypeRef src_type
= LLVMTypeOf(src
);
2991 src
= ac_to_integer(ctx
, src
);
2992 old
= ac_to_integer(ctx
, old
);
2993 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
2996 ret
= _ac_build_dpp(ctx
, old
, src
, dpp_ctrl
, row_mask
,
2997 bank_mask
, bound_ctrl
);
2999 assert(bits
% 32 == 0);
3000 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3001 LLVMValueRef src_vector
=
3002 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3003 LLVMValueRef old_vector
=
3004 LLVMBuildBitCast(ctx
->builder
, old
, vec_type
, "");
3005 ret
= LLVMGetUndef(vec_type
);
3006 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3007 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3008 LLVMConstInt(ctx
->i32
, i
,
3010 old
= LLVMBuildExtractElement(ctx
->builder
, old_vector
,
3011 LLVMConstInt(ctx
->i32
, i
,
3013 LLVMValueRef ret_comp
= _ac_build_dpp(ctx
, old
, src
,
3018 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3020 LLVMConstInt(ctx
->i32
, i
,
3024 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3027 static inline unsigned
3028 ds_pattern_bitmode(unsigned and_mask
, unsigned or_mask
, unsigned xor_mask
)
3030 assert(and_mask
< 32 && or_mask
< 32 && xor_mask
< 32);
3031 return and_mask
| (or_mask
<< 5) | (xor_mask
<< 10);
3035 _ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3037 return ac_build_intrinsic(ctx
, "llvm.amdgcn.ds.swizzle",
3038 LLVMTypeOf(src
), (LLVMValueRef
[]) {
3039 src
, LLVMConstInt(ctx
->i32
, mask
, 0) },
3040 2, AC_FUNC_ATTR_READNONE
| AC_FUNC_ATTR_CONVERGENT
);
3044 ac_build_ds_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, unsigned mask
)
3046 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3047 src
= ac_to_integer(ctx
, src
);
3048 unsigned bits
= LLVMGetIntTypeWidth(LLVMTypeOf(src
));
3051 ret
= _ac_build_ds_swizzle(ctx
, src
, mask
);
3053 assert(bits
% 32 == 0);
3054 LLVMTypeRef vec_type
= LLVMVectorType(ctx
->i32
, bits
/ 32);
3055 LLVMValueRef src_vector
=
3056 LLVMBuildBitCast(ctx
->builder
, src
, vec_type
, "");
3057 ret
= LLVMGetUndef(vec_type
);
3058 for (unsigned i
= 0; i
< bits
/ 32; i
++) {
3059 src
= LLVMBuildExtractElement(ctx
->builder
, src_vector
,
3060 LLVMConstInt(ctx
->i32
, i
,
3062 LLVMValueRef ret_comp
= _ac_build_ds_swizzle(ctx
, src
,
3064 ret
= LLVMBuildInsertElement(ctx
->builder
, ret
,
3066 LLVMConstInt(ctx
->i32
, i
,
3070 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3074 ac_build_wwm(struct ac_llvm_context
*ctx
, LLVMValueRef src
)
3076 char name
[32], type
[8];
3077 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3078 snprintf(name
, sizeof(name
), "llvm.amdgcn.wwm.%s", type
);
3079 return ac_build_intrinsic(ctx
, name
, LLVMTypeOf(src
),
3080 (LLVMValueRef
[]) { src
}, 1,
3081 AC_FUNC_ATTR_READNONE
);
3085 ac_build_set_inactive(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
3086 LLVMValueRef inactive
)
3088 char name
[33], type
[8];
3089 LLVMTypeRef src_type
= LLVMTypeOf(src
);
3090 src
= ac_to_integer(ctx
, src
);
3091 inactive
= ac_to_integer(ctx
, inactive
);
3092 ac_build_type_name_for_intr(LLVMTypeOf(src
), type
, sizeof(type
));
3093 snprintf(name
, sizeof(name
), "llvm.amdgcn.set.inactive.%s", type
);
3095 ac_build_intrinsic(ctx
, name
,
3096 LLVMTypeOf(src
), (LLVMValueRef
[]) {
3098 AC_FUNC_ATTR_READNONE
|
3099 AC_FUNC_ATTR_CONVERGENT
);
3100 return LLVMBuildBitCast(ctx
->builder
, ret
, src_type
, "");
3104 get_reduction_identity(struct ac_llvm_context
*ctx
, nir_op op
, unsigned type_size
)
3106 if (type_size
== 4) {
3108 case nir_op_iadd
: return ctx
->i32_0
;
3109 case nir_op_fadd
: return ctx
->f32_0
;
3110 case nir_op_imul
: return ctx
->i32_1
;
3111 case nir_op_fmul
: return ctx
->f32_1
;
3112 case nir_op_imin
: return LLVMConstInt(ctx
->i32
, INT32_MAX
, 0);
3113 case nir_op_umin
: return LLVMConstInt(ctx
->i32
, UINT32_MAX
, 0);
3114 case nir_op_fmin
: return LLVMConstReal(ctx
->f32
, INFINITY
);
3115 case nir_op_imax
: return LLVMConstInt(ctx
->i32
, INT32_MIN
, 0);
3116 case nir_op_umax
: return ctx
->i32_0
;
3117 case nir_op_fmax
: return LLVMConstReal(ctx
->f32
, -INFINITY
);
3118 case nir_op_iand
: return LLVMConstInt(ctx
->i32
, -1, 0);
3119 case nir_op_ior
: return ctx
->i32_0
;
3120 case nir_op_ixor
: return ctx
->i32_0
;
3122 unreachable("bad reduction intrinsic");
3124 } else { /* type_size == 64bit */
3126 case nir_op_iadd
: return ctx
->i64_0
;
3127 case nir_op_fadd
: return ctx
->f64_0
;
3128 case nir_op_imul
: return ctx
->i64_1
;
3129 case nir_op_fmul
: return ctx
->f64_1
;
3130 case nir_op_imin
: return LLVMConstInt(ctx
->i64
, INT64_MAX
, 0);
3131 case nir_op_umin
: return LLVMConstInt(ctx
->i64
, UINT64_MAX
, 0);
3132 case nir_op_fmin
: return LLVMConstReal(ctx
->f64
, INFINITY
);
3133 case nir_op_imax
: return LLVMConstInt(ctx
->i64
, INT64_MIN
, 0);
3134 case nir_op_umax
: return ctx
->i64_0
;
3135 case nir_op_fmax
: return LLVMConstReal(ctx
->f64
, -INFINITY
);
3136 case nir_op_iand
: return LLVMConstInt(ctx
->i64
, -1, 0);
3137 case nir_op_ior
: return ctx
->i64_0
;
3138 case nir_op_ixor
: return ctx
->i64_0
;
3140 unreachable("bad reduction intrinsic");
3146 ac_build_alu_op(struct ac_llvm_context
*ctx
, LLVMValueRef lhs
, LLVMValueRef rhs
, nir_op op
)
3148 bool _64bit
= ac_get_type_size(LLVMTypeOf(lhs
)) == 8;
3150 case nir_op_iadd
: return LLVMBuildAdd(ctx
->builder
, lhs
, rhs
, "");
3151 case nir_op_fadd
: return LLVMBuildFAdd(ctx
->builder
, lhs
, rhs
, "");
3152 case nir_op_imul
: return LLVMBuildMul(ctx
->builder
, lhs
, rhs
, "");
3153 case nir_op_fmul
: return LLVMBuildFMul(ctx
->builder
, lhs
, rhs
, "");
3154 case nir_op_imin
: return LLVMBuildSelect(ctx
->builder
,
3155 LLVMBuildICmp(ctx
->builder
, LLVMIntSLT
, lhs
, rhs
, ""),
3157 case nir_op_umin
: return LLVMBuildSelect(ctx
->builder
,
3158 LLVMBuildICmp(ctx
->builder
, LLVMIntULT
, lhs
, rhs
, ""),
3160 case nir_op_fmin
: return ac_build_intrinsic(ctx
,
3161 _64bit
? "llvm.minnum.f64" : "llvm.minnum.f32",
3162 _64bit
? ctx
->f64
: ctx
->f32
,
3163 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
3164 case nir_op_imax
: return LLVMBuildSelect(ctx
->builder
,
3165 LLVMBuildICmp(ctx
->builder
, LLVMIntSGT
, lhs
, rhs
, ""),
3167 case nir_op_umax
: return LLVMBuildSelect(ctx
->builder
,
3168 LLVMBuildICmp(ctx
->builder
, LLVMIntUGT
, lhs
, rhs
, ""),
3170 case nir_op_fmax
: return ac_build_intrinsic(ctx
,
3171 _64bit
? "llvm.maxnum.f64" : "llvm.maxnum.f32",
3172 _64bit
? ctx
->f64
: ctx
->f32
,
3173 (LLVMValueRef
[]){lhs
, rhs
}, 2, AC_FUNC_ATTR_READNONE
);
3174 case nir_op_iand
: return LLVMBuildAnd(ctx
->builder
, lhs
, rhs
, "");
3175 case nir_op_ior
: return LLVMBuildOr(ctx
->builder
, lhs
, rhs
, "");
3176 case nir_op_ixor
: return LLVMBuildXor(ctx
->builder
, lhs
, rhs
, "");
3178 unreachable("bad reduction intrinsic");
3183 * \param maxprefix specifies that the result only needs to be correct for a
3184 * prefix of this many threads
3186 * TODO: add inclusive and excluse scan functions for SI chip class.
3189 ac_build_scan(struct ac_llvm_context
*ctx
, nir_op op
, LLVMValueRef src
, LLVMValueRef identity
,
3192 LLVMValueRef result
, tmp
;
3196 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(1), 0xf, 0xf, false);
3197 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3200 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(2), 0xf, 0xf, false);
3201 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3204 tmp
= ac_build_dpp(ctx
, identity
, src
, dpp_row_sr(3), 0xf, 0xf, false);
3205 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3208 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(4), 0xf, 0xe, false);
3209 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3212 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_sr(8), 0xf, 0xc, false);
3213 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3214 if (maxprefix
<= 16)
3216 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
3217 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3218 if (maxprefix
<= 32)
3220 tmp
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
3221 result
= ac_build_alu_op(ctx
, result
, tmp
, op
);
3226 ac_build_inclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
3228 LLVMValueRef result
;
3230 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
3231 LLVMBuilderRef builder
= ctx
->builder
;
3232 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
3233 result
= ac_build_ballot(ctx
, src
);
3234 result
= ac_build_mbcnt(ctx
, result
);
3235 result
= LLVMBuildAdd(builder
, result
, src
, "");
3239 ac_build_optimization_barrier(ctx
, &src
);
3241 LLVMValueRef identity
=
3242 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
3243 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
3244 LLVMTypeOf(identity
), "");
3245 result
= ac_build_scan(ctx
, op
, result
, identity
, 64);
3247 return ac_build_wwm(ctx
, result
);
3251 ac_build_exclusive_scan(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
)
3253 LLVMValueRef result
;
3255 if (LLVMTypeOf(src
) == ctx
->i1
&& op
== nir_op_iadd
) {
3256 LLVMBuilderRef builder
= ctx
->builder
;
3257 src
= LLVMBuildZExt(builder
, src
, ctx
->i32
, "");
3258 result
= ac_build_ballot(ctx
, src
);
3259 result
= ac_build_mbcnt(ctx
, result
);
3263 ac_build_optimization_barrier(ctx
, &src
);
3265 LLVMValueRef identity
=
3266 get_reduction_identity(ctx
, op
, ac_get_type_size(LLVMTypeOf(src
)));
3267 result
= LLVMBuildBitCast(ctx
->builder
, ac_build_set_inactive(ctx
, src
, identity
),
3268 LLVMTypeOf(identity
), "");
3269 result
= ac_build_dpp(ctx
, identity
, result
, dpp_wf_sr1
, 0xf, 0xf, false);
3270 result
= ac_build_scan(ctx
, op
, result
, identity
, 64);
3272 return ac_build_wwm(ctx
, result
);
3276 ac_build_reduce(struct ac_llvm_context
*ctx
, LLVMValueRef src
, nir_op op
, unsigned cluster_size
)
3278 if (cluster_size
== 1) return src
;
3279 ac_build_optimization_barrier(ctx
, &src
);
3280 LLVMValueRef result
, swap
;
3281 LLVMValueRef identity
= get_reduction_identity(ctx
, op
,
3282 ac_get_type_size(LLVMTypeOf(src
)));
3283 result
= LLVMBuildBitCast(ctx
->builder
,
3284 ac_build_set_inactive(ctx
, src
, identity
),
3285 LLVMTypeOf(identity
), "");
3286 swap
= ac_build_quad_swizzle(ctx
, result
, 1, 0, 3, 2);
3287 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3288 if (cluster_size
== 2) return ac_build_wwm(ctx
, result
);
3290 swap
= ac_build_quad_swizzle(ctx
, result
, 2, 3, 0, 1);
3291 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3292 if (cluster_size
== 4) return ac_build_wwm(ctx
, result
);
3294 if (ctx
->chip_class
>= VI
)
3295 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_half_mirror
, 0xf, 0xf, false);
3297 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x04));
3298 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3299 if (cluster_size
== 8) return ac_build_wwm(ctx
, result
);
3301 if (ctx
->chip_class
>= VI
)
3302 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_mirror
, 0xf, 0xf, false);
3304 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x08));
3305 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3306 if (cluster_size
== 16) return ac_build_wwm(ctx
, result
);
3308 if (ctx
->chip_class
>= VI
&& cluster_size
!= 32)
3309 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast15
, 0xa, 0xf, false);
3311 swap
= ac_build_ds_swizzle(ctx
, result
, ds_pattern_bitmode(0x1f, 0, 0x10));
3312 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3313 if (cluster_size
== 32) return ac_build_wwm(ctx
, result
);
3315 if (ctx
->chip_class
>= VI
) {
3316 swap
= ac_build_dpp(ctx
, identity
, result
, dpp_row_bcast31
, 0xc, 0xf, false);
3317 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3318 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 63, 0));
3319 return ac_build_wwm(ctx
, result
);
3321 swap
= ac_build_readlane(ctx
, result
, ctx
->i32_0
);
3322 result
= ac_build_readlane(ctx
, result
, LLVMConstInt(ctx
->i32
, 32, 0));
3323 result
= ac_build_alu_op(ctx
, result
, swap
, op
);
3324 return ac_build_wwm(ctx
, result
);
3329 * "Top half" of a scan that reduces per-wave values across an entire
3332 * The source value must be present in the highest lane of the wave, and the
3333 * highest lane must be live.
3336 ac_build_wg_wavescan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3338 if (ws
->maxwaves
<= 1)
3341 const LLVMValueRef i32_63
= LLVMConstInt(ctx
->i32
, 63, false);
3342 LLVMBuilderRef builder
= ctx
->builder
;
3343 LLVMValueRef tid
= ac_get_thread_id(ctx
);
3346 tmp
= LLVMBuildICmp(builder
, LLVMIntEQ
, tid
, i32_63
, "");
3347 ac_build_ifcc(ctx
, tmp
, 1000);
3348 LLVMBuildStore(builder
, ws
->src
, LLVMBuildGEP(builder
, ws
->scratch
, &ws
->waveidx
, 1, ""));
3349 ac_build_endif(ctx
, 1000);
3353 * "Bottom half" of a scan that reduces per-wave values across an entire
3356 * The caller must place a barrier between the top and bottom halves.
3359 ac_build_wg_wavescan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3361 const LLVMTypeRef type
= LLVMTypeOf(ws
->src
);
3362 const LLVMValueRef identity
=
3363 get_reduction_identity(ctx
, ws
->op
, ac_get_type_size(type
));
3365 if (ws
->maxwaves
<= 1) {
3366 ws
->result_reduce
= ws
->src
;
3367 ws
->result_inclusive
= ws
->src
;
3368 ws
->result_exclusive
= identity
;
3371 assert(ws
->maxwaves
<= 32);
3373 LLVMBuilderRef builder
= ctx
->builder
;
3374 LLVMValueRef tid
= ac_get_thread_id(ctx
);
3375 LLVMBasicBlockRef bbs
[2];
3376 LLVMValueRef phivalues_scan
[2];
3377 LLVMValueRef tmp
, tmp2
;
3379 bbs
[0] = LLVMGetInsertBlock(builder
);
3380 phivalues_scan
[0] = LLVMGetUndef(type
);
3382 if (ws
->enable_reduce
)
3383 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->numwaves
, "");
3384 else if (ws
->enable_inclusive
)
3385 tmp
= LLVMBuildICmp(builder
, LLVMIntULE
, tid
, ws
->waveidx
, "");
3387 tmp
= LLVMBuildICmp(builder
, LLVMIntULT
, tid
, ws
->waveidx
, "");
3388 ac_build_ifcc(ctx
, tmp
, 1001);
3390 tmp
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, ws
->scratch
, &tid
, 1, ""), "");
3392 ac_build_optimization_barrier(ctx
, &tmp
);
3394 bbs
[1] = LLVMGetInsertBlock(builder
);
3395 phivalues_scan
[1] = ac_build_scan(ctx
, ws
->op
, tmp
, identity
, ws
->maxwaves
);
3397 ac_build_endif(ctx
, 1001);
3399 const LLVMValueRef scan
= ac_build_phi(ctx
, type
, 2, phivalues_scan
, bbs
);
3401 if (ws
->enable_reduce
) {
3402 tmp
= LLVMBuildSub(builder
, ws
->numwaves
, ctx
->i32_1
, "");
3403 ws
->result_reduce
= ac_build_readlane(ctx
, scan
, tmp
);
3405 if (ws
->enable_inclusive
)
3406 ws
->result_inclusive
= ac_build_readlane(ctx
, scan
, ws
->waveidx
);
3407 if (ws
->enable_exclusive
) {
3408 tmp
= LLVMBuildSub(builder
, ws
->waveidx
, ctx
->i32_1
, "");
3409 tmp
= ac_build_readlane(ctx
, scan
, tmp
);
3410 tmp2
= LLVMBuildICmp(builder
, LLVMIntEQ
, ws
->waveidx
, ctx
->i32_0
, "");
3411 ws
->result_exclusive
= LLVMBuildSelect(builder
, tmp2
, identity
, tmp
, "");
3416 * Inclusive scan of a per-wave value across an entire workgroup.
3418 * This implies an s_barrier instruction.
3420 * Unlike ac_build_inclusive_scan, the caller \em must ensure that all threads
3421 * of the workgroup are live. (This requirement cannot easily be relaxed in a
3422 * useful manner because of the barrier in the algorithm.)
3425 ac_build_wg_wavescan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3427 ac_build_wg_wavescan_top(ctx
, ws
);
3428 ac_build_s_barrier(ctx
);
3429 ac_build_wg_wavescan_bottom(ctx
, ws
);
3433 * "Top half" of a scan that reduces per-thread values across an entire
3436 * All lanes must be active when this code runs.
3439 ac_build_wg_scan_top(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3441 if (ws
->enable_exclusive
) {
3442 ws
->extra
= ac_build_exclusive_scan(ctx
, ws
->src
, ws
->op
);
3443 if (LLVMTypeOf(ws
->src
) == ctx
->i1
&& ws
->op
== nir_op_iadd
)
3444 ws
->src
= LLVMBuildZExt(ctx
->builder
, ws
->src
, ctx
->i32
, "");
3445 ws
->src
= ac_build_alu_op(ctx
, ws
->extra
, ws
->src
, ws
->op
);
3447 ws
->src
= ac_build_inclusive_scan(ctx
, ws
->src
, ws
->op
);
3450 bool enable_inclusive
= ws
->enable_inclusive
;
3451 bool enable_exclusive
= ws
->enable_exclusive
;
3452 ws
->enable_inclusive
= false;
3453 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
3454 ac_build_wg_wavescan_top(ctx
, ws
);
3455 ws
->enable_inclusive
= enable_inclusive
;
3456 ws
->enable_exclusive
= enable_exclusive
;
3460 * "Bottom half" of a scan that reduces per-thread values across an entire
3463 * The caller must place a barrier between the top and bottom halves.
3466 ac_build_wg_scan_bottom(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3468 bool enable_inclusive
= ws
->enable_inclusive
;
3469 bool enable_exclusive
= ws
->enable_exclusive
;
3470 ws
->enable_inclusive
= false;
3471 ws
->enable_exclusive
= ws
->enable_exclusive
|| enable_inclusive
;
3472 ac_build_wg_wavescan_bottom(ctx
, ws
);
3473 ws
->enable_inclusive
= enable_inclusive
;
3474 ws
->enable_exclusive
= enable_exclusive
;
3476 /* ws->result_reduce is already the correct value */
3477 if (ws
->enable_inclusive
)
3478 ws
->result_inclusive
= ac_build_alu_op(ctx
, ws
->result_exclusive
, ws
->src
, ws
->op
);
3479 if (ws
->enable_exclusive
)
3480 ws
->result_exclusive
= ac_build_alu_op(ctx
, ws
->result_exclusive
, ws
->extra
, ws
->op
);
3484 * A scan that reduces per-thread values across an entire workgroup.
3486 * The caller must ensure that all lanes are active when this code runs
3487 * (WWM is insufficient!), because there is an implied barrier.
3490 ac_build_wg_scan(struct ac_llvm_context
*ctx
, struct ac_wg_scan
*ws
)
3492 ac_build_wg_scan_top(ctx
, ws
);
3493 ac_build_s_barrier(ctx
);
3494 ac_build_wg_scan_bottom(ctx
, ws
);
3498 ac_build_quad_swizzle(struct ac_llvm_context
*ctx
, LLVMValueRef src
,
3499 unsigned lane0
, unsigned lane1
, unsigned lane2
, unsigned lane3
)
3501 unsigned mask
= dpp_quad_perm(lane0
, lane1
, lane2
, lane3
);
3502 if (ctx
->chip_class
>= VI
) {
3503 return ac_build_dpp(ctx
, src
, src
, mask
, 0xf, 0xf, false);
3505 return ac_build_ds_swizzle(ctx
, src
, (1 << 15) | mask
);
3510 ac_build_shuffle(struct ac_llvm_context
*ctx
, LLVMValueRef src
, LLVMValueRef index
)
3512 index
= LLVMBuildMul(ctx
->builder
, index
, LLVMConstInt(ctx
->i32
, 4, 0), "");
3513 return ac_build_intrinsic(ctx
,
3514 "llvm.amdgcn.ds.bpermute", ctx
->i32
,
3515 (LLVMValueRef
[]) {index
, src
}, 2,
3516 AC_FUNC_ATTR_READNONE
|
3517 AC_FUNC_ATTR_CONVERGENT
);