1 //===-- AMDGPUISelLowering.cpp - AMDGPU Common DAG lowering functions -----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief This is the parent TargetLowering class for hardware code gen
14 //===----------------------------------------------------------------------===//
16 #include "AMDGPUISelLowering.h"
18 #include "AMDGPUFrameLowering.h"
19 #include "AMDGPUIntrinsicInfo.h"
20 #include "AMDGPURegisterInfo.h"
21 #include "AMDGPUSubtarget.h"
22 #include "R600MachineFunctionInfo.h"
23 #include "SIMachineFunctionInfo.h"
24 #include "llvm/CodeGen/CallingConvLower.h"
25 #include "llvm/CodeGen/MachineFunction.h"
26 #include "llvm/CodeGen/MachineRegisterInfo.h"
27 #include "llvm/CodeGen/SelectionDAG.h"
28 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
29 #include "llvm/IR/DataLayout.h"
30 #include "llvm/IR/DiagnosticInfo.h"
31 #include "llvm/IR/DiagnosticPrinter.h"
37 /// Diagnostic information for unimplemented or unsupported feature reporting.
38 class DiagnosticInfoUnsupported : public DiagnosticInfo {
40 const Twine &Description;
45 static int getKindID() {
47 KindID = llvm::getNextAvailablePluginDiagnosticKind();
52 DiagnosticInfoUnsupported(const Function &Fn, const Twine &Desc,
53 DiagnosticSeverity Severity = DS_Error)
54 : DiagnosticInfo(getKindID(), Severity),
58 const Function &getFunction() const { return Fn; }
59 const Twine &getDescription() const { return Description; }
61 void print(DiagnosticPrinter &DP) const override {
62 DP << "unsupported " << getDescription() << " in " << Fn.getName();
65 static bool classof(const DiagnosticInfo *DI) {
66 return DI->getKind() == getKindID();
70 int DiagnosticInfoUnsupported::KindID = 0;
74 static bool allocateStack(unsigned ValNo, MVT ValVT, MVT LocVT,
75 CCValAssign::LocInfo LocInfo,
76 ISD::ArgFlagsTy ArgFlags, CCState &State) {
77 unsigned Offset = State.AllocateStack(ValVT.getStoreSize(),
78 ArgFlags.getOrigAlign());
79 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
84 #include "AMDGPUGenCallingConv.inc"
86 // Find a larger type to do a load / store of a vector with.
87 EVT AMDGPUTargetLowering::getEquivalentMemType(LLVMContext &Ctx, EVT VT) {
88 unsigned StoreSize = VT.getStoreSizeInBits();
90 return EVT::getIntegerVT(Ctx, StoreSize);
92 assert(StoreSize % 32 == 0 && "Store size not a multiple of 32");
93 return EVT::getVectorVT(Ctx, MVT::i32, StoreSize / 32);
96 // Type for a vector that will be loaded to.
97 EVT AMDGPUTargetLowering::getEquivalentLoadRegType(LLVMContext &Ctx, EVT VT) {
98 unsigned StoreSize = VT.getStoreSizeInBits();
100 return EVT::getIntegerVT(Ctx, 32);
102 return EVT::getVectorVT(Ctx, MVT::i32, StoreSize / 32);
105 AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM,
106 const AMDGPUSubtarget &STI)
107 : TargetLowering(TM), Subtarget(&STI) {
108 setOperationAction(ISD::Constant, MVT::i32, Legal);
109 setOperationAction(ISD::Constant, MVT::i64, Legal);
110 setOperationAction(ISD::ConstantFP, MVT::f32, Legal);
111 setOperationAction(ISD::ConstantFP, MVT::f64, Legal);
113 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
114 setOperationAction(ISD::BRIND, MVT::Other, Expand);
116 // We need to custom lower some of the intrinsics
117 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
119 // Library functions. These default to Expand, but we have instructions
121 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
122 setOperationAction(ISD::FEXP2, MVT::f32, Legal);
123 setOperationAction(ISD::FPOW, MVT::f32, Legal);
124 setOperationAction(ISD::FLOG2, MVT::f32, Legal);
125 setOperationAction(ISD::FABS, MVT::f32, Legal);
126 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
127 setOperationAction(ISD::FRINT, MVT::f32, Legal);
128 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
129 setOperationAction(ISD::FMINNUM, MVT::f32, Legal);
130 setOperationAction(ISD::FMAXNUM, MVT::f32, Legal);
132 setOperationAction(ISD::FROUND, MVT::f32, Custom);
133 setOperationAction(ISD::FROUND, MVT::f64, Custom);
135 setOperationAction(ISD::FREM, MVT::f32, Custom);
136 setOperationAction(ISD::FREM, MVT::f64, Custom);
138 // v_mad_f32 does not support denormals according to some sources.
139 if (!Subtarget->hasFP32Denormals())
140 setOperationAction(ISD::FMAD, MVT::f32, Legal);
142 // Expand to fneg + fadd.
143 setOperationAction(ISD::FSUB, MVT::f64, Expand);
145 // Lower floating point store/load to integer store/load to reduce the number
146 // of patterns in tablegen.
147 setOperationAction(ISD::STORE, MVT::f32, Promote);
148 AddPromotedToType(ISD::STORE, MVT::f32, MVT::i32);
150 setOperationAction(ISD::STORE, MVT::v2f32, Promote);
151 AddPromotedToType(ISD::STORE, MVT::v2f32, MVT::v2i32);
153 setOperationAction(ISD::STORE, MVT::v4f32, Promote);
154 AddPromotedToType(ISD::STORE, MVT::v4f32, MVT::v4i32);
156 setOperationAction(ISD::STORE, MVT::v8f32, Promote);
157 AddPromotedToType(ISD::STORE, MVT::v8f32, MVT::v8i32);
159 setOperationAction(ISD::STORE, MVT::v16f32, Promote);
160 AddPromotedToType(ISD::STORE, MVT::v16f32, MVT::v16i32);
162 setOperationAction(ISD::STORE, MVT::f64, Promote);
163 AddPromotedToType(ISD::STORE, MVT::f64, MVT::i64);
165 setOperationAction(ISD::STORE, MVT::v2f64, Promote);
166 AddPromotedToType(ISD::STORE, MVT::v2f64, MVT::v2i64);
168 // Custom lowering of vector stores is required for local address space
170 setOperationAction(ISD::STORE, MVT::v4i32, Custom);
172 setTruncStoreAction(MVT::v2i32, MVT::v2i16, Custom);
173 setTruncStoreAction(MVT::v2i32, MVT::v2i8, Custom);
174 setTruncStoreAction(MVT::v4i32, MVT::v4i8, Custom);
176 // XXX: This can be change to Custom, once ExpandVectorStores can
177 // handle 64-bit stores.
178 setTruncStoreAction(MVT::v4i32, MVT::v4i16, Expand);
180 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
181 setTruncStoreAction(MVT::i64, MVT::i8, Expand);
182 setTruncStoreAction(MVT::i64, MVT::i1, Expand);
183 setTruncStoreAction(MVT::v2i64, MVT::v2i1, Expand);
184 setTruncStoreAction(MVT::v4i64, MVT::v4i1, Expand);
187 setOperationAction(ISD::LOAD, MVT::f32, Promote);
188 AddPromotedToType(ISD::LOAD, MVT::f32, MVT::i32);
190 setOperationAction(ISD::LOAD, MVT::v2f32, Promote);
191 AddPromotedToType(ISD::LOAD, MVT::v2f32, MVT::v2i32);
193 setOperationAction(ISD::LOAD, MVT::v4f32, Promote);
194 AddPromotedToType(ISD::LOAD, MVT::v4f32, MVT::v4i32);
196 setOperationAction(ISD::LOAD, MVT::v8f32, Promote);
197 AddPromotedToType(ISD::LOAD, MVT::v8f32, MVT::v8i32);
199 setOperationAction(ISD::LOAD, MVT::v16f32, Promote);
200 AddPromotedToType(ISD::LOAD, MVT::v16f32, MVT::v16i32);
202 setOperationAction(ISD::LOAD, MVT::f64, Promote);
203 AddPromotedToType(ISD::LOAD, MVT::f64, MVT::i64);
205 setOperationAction(ISD::LOAD, MVT::v2f64, Promote);
206 AddPromotedToType(ISD::LOAD, MVT::v2f64, MVT::v2i64);
208 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
209 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Custom);
210 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
211 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
212 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f32, Custom);
213 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i32, Custom);
214 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4f32, Custom);
215 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4i32, Custom);
216 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f32, Custom);
217 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8i32, Custom);
219 // There are no 64-bit extloads. These should be done as a 32-bit extload and
220 // an extension to 64-bit.
221 for (MVT VT : MVT::integer_valuetypes()) {
222 setLoadExtAction(ISD::EXTLOAD, MVT::i64, VT, Expand);
223 setLoadExtAction(ISD::SEXTLOAD, MVT::i64, VT, Expand);
224 setLoadExtAction(ISD::ZEXTLOAD, MVT::i64, VT, Expand);
227 for (MVT VT : MVT::integer_vector_valuetypes()) {
228 setLoadExtAction(ISD::EXTLOAD, VT, MVT::v2i8, Expand);
229 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v2i8, Expand);
230 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v2i8, Expand);
231 setLoadExtAction(ISD::EXTLOAD, VT, MVT::v4i8, Expand);
232 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v4i8, Expand);
233 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v4i8, Expand);
234 setLoadExtAction(ISD::EXTLOAD, VT, MVT::v2i16, Expand);
235 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v2i16, Expand);
236 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v2i16, Expand);
237 setLoadExtAction(ISD::EXTLOAD, VT, MVT::v4i16, Expand);
238 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v4i16, Expand);
239 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v4i16, Expand);
242 setOperationAction(ISD::BR_CC, MVT::i1, Expand);
244 if (Subtarget->getGeneration() < AMDGPUSubtarget::SEA_ISLANDS) {
245 setOperationAction(ISD::FCEIL, MVT::f64, Custom);
246 setOperationAction(ISD::FTRUNC, MVT::f64, Custom);
247 setOperationAction(ISD::FRINT, MVT::f64, Custom);
248 setOperationAction(ISD::FFLOOR, MVT::f64, Custom);
251 if (!Subtarget->hasBFI()) {
252 // fcopysign can be done in a single instruction with BFI.
253 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
254 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
257 setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand);
259 setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand);
260 setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand);
261 setTruncStoreAction(MVT::f32, MVT::f16, Expand);
262 setTruncStoreAction(MVT::f64, MVT::f16, Expand);
264 const MVT ScalarIntVTs[] = { MVT::i32, MVT::i64 };
265 for (MVT VT : ScalarIntVTs) {
266 setOperationAction(ISD::SREM, VT, Expand);
267 setOperationAction(ISD::SDIV, VT, Expand);
269 // GPU does not have divrem function for signed or unsigned.
270 setOperationAction(ISD::SDIVREM, VT, Custom);
271 setOperationAction(ISD::UDIVREM, VT, Custom);
273 // GPU does not have [S|U]MUL_LOHI functions as a single instruction.
274 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
275 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
277 setOperationAction(ISD::BSWAP, VT, Expand);
278 setOperationAction(ISD::CTTZ, VT, Expand);
279 setOperationAction(ISD::CTLZ, VT, Expand);
282 if (!Subtarget->hasBCNT(32))
283 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
285 if (!Subtarget->hasBCNT(64))
286 setOperationAction(ISD::CTPOP, MVT::i64, Expand);
288 // The hardware supports 32-bit ROTR, but not ROTL.
289 setOperationAction(ISD::ROTL, MVT::i32, Expand);
290 setOperationAction(ISD::ROTL, MVT::i64, Expand);
291 setOperationAction(ISD::ROTR, MVT::i64, Expand);
293 setOperationAction(ISD::MUL, MVT::i64, Expand);
294 setOperationAction(ISD::MULHU, MVT::i64, Expand);
295 setOperationAction(ISD::MULHS, MVT::i64, Expand);
296 setOperationAction(ISD::UDIV, MVT::i32, Expand);
297 setOperationAction(ISD::UREM, MVT::i32, Expand);
298 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
299 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
300 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
301 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
302 setOperationAction(ISD::SELECT_CC, MVT::i64, Expand);
304 if (!Subtarget->hasFFBH())
305 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
307 if (!Subtarget->hasFFBL())
308 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
310 static const MVT::SimpleValueType VectorIntTypes[] = {
311 MVT::v2i32, MVT::v4i32
314 for (MVT VT : VectorIntTypes) {
315 // Expand the following operations for the current type by default.
316 setOperationAction(ISD::ADD, VT, Expand);
317 setOperationAction(ISD::AND, VT, Expand);
318 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
319 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
320 setOperationAction(ISD::MUL, VT, Expand);
321 setOperationAction(ISD::OR, VT, Expand);
322 setOperationAction(ISD::SHL, VT, Expand);
323 setOperationAction(ISD::SRA, VT, Expand);
324 setOperationAction(ISD::SRL, VT, Expand);
325 setOperationAction(ISD::ROTL, VT, Expand);
326 setOperationAction(ISD::ROTR, VT, Expand);
327 setOperationAction(ISD::SUB, VT, Expand);
328 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
329 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
330 setOperationAction(ISD::SDIV, VT, Expand);
331 setOperationAction(ISD::UDIV, VT, Expand);
332 setOperationAction(ISD::SREM, VT, Expand);
333 setOperationAction(ISD::UREM, VT, Expand);
334 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
335 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
336 setOperationAction(ISD::SDIVREM, VT, Custom);
337 setOperationAction(ISD::UDIVREM, VT, Custom);
338 setOperationAction(ISD::ADDC, VT, Expand);
339 setOperationAction(ISD::SUBC, VT, Expand);
340 setOperationAction(ISD::ADDE, VT, Expand);
341 setOperationAction(ISD::SUBE, VT, Expand);
342 setOperationAction(ISD::SELECT, VT, Expand);
343 setOperationAction(ISD::VSELECT, VT, Expand);
344 setOperationAction(ISD::SELECT_CC, VT, Expand);
345 setOperationAction(ISD::XOR, VT, Expand);
346 setOperationAction(ISD::BSWAP, VT, Expand);
347 setOperationAction(ISD::CTPOP, VT, Expand);
348 setOperationAction(ISD::CTTZ, VT, Expand);
349 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
350 setOperationAction(ISD::CTLZ, VT, Expand);
351 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
352 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand);
355 static const MVT::SimpleValueType FloatVectorTypes[] = {
356 MVT::v2f32, MVT::v4f32
359 for (MVT VT : FloatVectorTypes) {
360 setOperationAction(ISD::FABS, VT, Expand);
361 setOperationAction(ISD::FMINNUM, VT, Expand);
362 setOperationAction(ISD::FMAXNUM, VT, Expand);
363 setOperationAction(ISD::FADD, VT, Expand);
364 setOperationAction(ISD::FCEIL, VT, Expand);
365 setOperationAction(ISD::FCOS, VT, Expand);
366 setOperationAction(ISD::FDIV, VT, Expand);
367 setOperationAction(ISD::FEXP2, VT, Expand);
368 setOperationAction(ISD::FLOG2, VT, Expand);
369 setOperationAction(ISD::FREM, VT, Expand);
370 setOperationAction(ISD::FPOW, VT, Expand);
371 setOperationAction(ISD::FFLOOR, VT, Expand);
372 setOperationAction(ISD::FTRUNC, VT, Expand);
373 setOperationAction(ISD::FMUL, VT, Expand);
374 setOperationAction(ISD::FMA, VT, Expand);
375 setOperationAction(ISD::FRINT, VT, Expand);
376 setOperationAction(ISD::FNEARBYINT, VT, Expand);
377 setOperationAction(ISD::FSQRT, VT, Expand);
378 setOperationAction(ISD::FSIN, VT, Expand);
379 setOperationAction(ISD::FSUB, VT, Expand);
380 setOperationAction(ISD::FNEG, VT, Expand);
381 setOperationAction(ISD::SELECT, VT, Expand);
382 setOperationAction(ISD::VSELECT, VT, Expand);
383 setOperationAction(ISD::SELECT_CC, VT, Expand);
384 setOperationAction(ISD::FCOPYSIGN, VT, Expand);
385 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand);
388 setOperationAction(ISD::FNEARBYINT, MVT::f32, Custom);
389 setOperationAction(ISD::FNEARBYINT, MVT::f64, Custom);
391 setTargetDAGCombine(ISD::MUL);
392 setTargetDAGCombine(ISD::SELECT);
393 setTargetDAGCombine(ISD::SELECT_CC);
394 setTargetDAGCombine(ISD::STORE);
396 setTargetDAGCombine(ISD::FADD);
397 setTargetDAGCombine(ISD::FSUB);
399 setBooleanContents(ZeroOrNegativeOneBooleanContent);
400 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
402 setSchedulingPreference(Sched::RegPressure);
403 setJumpIsExpensive(true);
405 // SI at least has hardware support for floating point exceptions, but no way
406 // of using or handling them is implemented. They are also optional in OpenCL
408 setHasFloatingPointExceptions(false);
410 setSelectIsExpensive(false);
411 PredictableSelectIsExpensive = false;
413 // There are no integer divide instructions, and these expand to a pretty
414 // large sequence of instructions.
415 setIntDivIsCheap(false);
416 setPow2SDivIsCheap(false);
417 setFsqrtIsCheap(true);
419 // FIXME: Need to really handle these.
420 MaxStoresPerMemcpy = 4096;
421 MaxStoresPerMemmove = 4096;
422 MaxStoresPerMemset = 4096;
425 //===----------------------------------------------------------------------===//
426 // Target Information
427 //===----------------------------------------------------------------------===//
429 MVT AMDGPUTargetLowering::getVectorIdxTy() const {
433 bool AMDGPUTargetLowering::isSelectSupported(SelectSupportKind SelType) const {
437 // The backend supports 32 and 64 bit floating point immediates.
438 // FIXME: Why are we reporting vectors of FP immediates as legal?
439 bool AMDGPUTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
440 EVT ScalarVT = VT.getScalarType();
441 return (ScalarVT == MVT::f32 || ScalarVT == MVT::f64);
444 // We don't want to shrink f64 / f32 constants.
445 bool AMDGPUTargetLowering::ShouldShrinkFPConstant(EVT VT) const {
446 EVT ScalarVT = VT.getScalarType();
447 return (ScalarVT != MVT::f32 && ScalarVT != MVT::f64);
450 bool AMDGPUTargetLowering::shouldReduceLoadWidth(SDNode *N,
454 unsigned NewSize = NewVT.getStoreSizeInBits();
456 // If we are reducing to a 32-bit load, this is always better.
460 EVT OldVT = N->getValueType(0);
461 unsigned OldSize = OldVT.getStoreSizeInBits();
463 // Don't produce extloads from sub 32-bit types. SI doesn't have scalar
464 // extloads, so doing one requires using a buffer_load. In cases where we
465 // still couldn't use a scalar load, using the wider load shouldn't really
468 // If the old size already had to be an extload, there's no harm in continuing
469 // to reduce the width.
470 return (OldSize < 32);
473 bool AMDGPUTargetLowering::isLoadBitCastBeneficial(EVT LoadTy,
475 if (LoadTy.getSizeInBits() != CastTy.getSizeInBits())
478 unsigned LScalarSize = LoadTy.getScalarType().getSizeInBits();
479 unsigned CastScalarSize = CastTy.getScalarType().getSizeInBits();
481 return ((LScalarSize <= CastScalarSize) ||
482 (CastScalarSize >= 32) ||
486 // SI+ has instructions for cttz / ctlz for 32-bit values. This is probably also
487 // profitable with the expansion for 64-bit since it's generally good to
489 // FIXME: These should really have the size as a parameter.
490 bool AMDGPUTargetLowering::isCheapToSpeculateCttz() const {
494 bool AMDGPUTargetLowering::isCheapToSpeculateCtlz() const {
498 //===---------------------------------------------------------------------===//
500 //===---------------------------------------------------------------------===//
502 bool AMDGPUTargetLowering::isFAbsFree(EVT VT) const {
503 assert(VT.isFloatingPoint());
504 return VT == MVT::f32 || VT == MVT::f64;
507 bool AMDGPUTargetLowering::isFNegFree(EVT VT) const {
508 assert(VT.isFloatingPoint());
509 return VT == MVT::f32 || VT == MVT::f64;
512 bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const {
513 // Truncate is just accessing a subregister.
514 return Dest.bitsLT(Source) && (Dest.getSizeInBits() % 32 == 0);
517 bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const {
518 // Truncate is just accessing a subregister.
519 return Dest->getPrimitiveSizeInBits() < Source->getPrimitiveSizeInBits() &&
520 (Dest->getPrimitiveSizeInBits() % 32 == 0);
523 bool AMDGPUTargetLowering::isZExtFree(Type *Src, Type *Dest) const {
524 const DataLayout *DL = getDataLayout();
525 unsigned SrcSize = DL->getTypeSizeInBits(Src->getScalarType());
526 unsigned DestSize = DL->getTypeSizeInBits(Dest->getScalarType());
528 return SrcSize == 32 && DestSize == 64;
531 bool AMDGPUTargetLowering::isZExtFree(EVT Src, EVT Dest) const {
532 // Any register load of a 64-bit value really requires 2 32-bit moves. For all
533 // practical purposes, the extra mov 0 to load a 64-bit is free. As used,
534 // this will enable reducing 64-bit operations the 32-bit, which is always
536 return Src == MVT::i32 && Dest == MVT::i64;
539 bool AMDGPUTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
540 return isZExtFree(Val.getValueType(), VT2);
543 bool AMDGPUTargetLowering::isNarrowingProfitable(EVT SrcVT, EVT DestVT) const {
544 // There aren't really 64-bit registers, but pairs of 32-bit ones and only a
545 // limited number of native 64-bit operations. Shrinking an operation to fit
546 // in a single 32-bit register should always be helpful. As currently used,
547 // this is much less general than the name suggests, and is only used in
548 // places trying to reduce the sizes of loads. Shrinking loads to < 32-bits is
549 // not profitable, and may actually be harmful.
550 return SrcVT.getSizeInBits() > 32 && DestVT.getSizeInBits() == 32;
553 //===---------------------------------------------------------------------===//
554 // TargetLowering Callbacks
555 //===---------------------------------------------------------------------===//
557 void AMDGPUTargetLowering::AnalyzeFormalArguments(CCState &State,
558 const SmallVectorImpl<ISD::InputArg> &Ins) const {
560 State.AnalyzeFormalArguments(Ins, CC_AMDGPU);
563 SDValue AMDGPUTargetLowering::LowerReturn(
565 CallingConv::ID CallConv,
567 const SmallVectorImpl<ISD::OutputArg> &Outs,
568 const SmallVectorImpl<SDValue> &OutVals,
569 SDLoc DL, SelectionDAG &DAG) const {
570 return DAG.getNode(AMDGPUISD::RET_FLAG, DL, MVT::Other, Chain);
573 //===---------------------------------------------------------------------===//
574 // Target specific lowering
575 //===---------------------------------------------------------------------===//
577 SDValue AMDGPUTargetLowering::LowerCall(CallLoweringInfo &CLI,
578 SmallVectorImpl<SDValue> &InVals) const {
579 SDValue Callee = CLI.Callee;
580 SelectionDAG &DAG = CLI.DAG;
582 const Function &Fn = *DAG.getMachineFunction().getFunction();
584 StringRef FuncName("<unknown>");
586 if (const ExternalSymbolSDNode *G = dyn_cast<ExternalSymbolSDNode>(Callee))
587 FuncName = G->getSymbol();
588 else if (const GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
589 FuncName = G->getGlobal()->getName();
591 DiagnosticInfoUnsupported NoCalls(Fn, "call to function " + FuncName);
592 DAG.getContext()->diagnose(NoCalls);
596 SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op,
597 SelectionDAG &DAG) const {
598 switch (Op.getOpcode()) {
600 Op.getNode()->dump();
601 llvm_unreachable("Custom lowering code for this"
602 "instruction is not implemented yet!");
604 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG);
605 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
606 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
607 case ISD::FrameIndex: return LowerFrameIndex(Op, DAG);
608 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
609 case ISD::UDIVREM: return LowerUDIVREM(Op, DAG);
610 case ISD::SDIVREM: return LowerSDIVREM(Op, DAG);
611 case ISD::FREM: return LowerFREM(Op, DAG);
612 case ISD::FCEIL: return LowerFCEIL(Op, DAG);
613 case ISD::FTRUNC: return LowerFTRUNC(Op, DAG);
614 case ISD::FRINT: return LowerFRINT(Op, DAG);
615 case ISD::FNEARBYINT: return LowerFNEARBYINT(Op, DAG);
616 case ISD::FROUND: return LowerFROUND(Op, DAG);
617 case ISD::FFLOOR: return LowerFFLOOR(Op, DAG);
618 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
619 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
620 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
621 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
626 void AMDGPUTargetLowering::ReplaceNodeResults(SDNode *N,
627 SmallVectorImpl<SDValue> &Results,
628 SelectionDAG &DAG) const {
629 switch (N->getOpcode()) {
630 case ISD::SIGN_EXTEND_INREG:
631 // Different parts of legalization seem to interpret which type of
632 // sign_extend_inreg is the one to check for custom lowering. The extended
633 // from type is what really matters, but some places check for custom
634 // lowering of the result type. This results in trying to use
635 // ReplaceNodeResults to sext_in_reg to an illegal type, so we'll just do
636 // nothing here and let the illegal result integer be handled normally.
639 SDNode *Node = LowerLOAD(SDValue(N, 0), DAG).getNode();
643 Results.push_back(SDValue(Node, 0));
644 Results.push_back(SDValue(Node, 1));
645 // XXX: LLVM seems not to replace Chain Value inside CustomWidenLowerNode
647 DAG.ReplaceAllUsesOfValueWith(SDValue(N,1), SDValue(Node, 1));
651 SDValue Lowered = LowerSTORE(SDValue(N, 0), DAG);
652 if (Lowered.getNode())
653 Results.push_back(Lowered);
661 // FIXME: This implements accesses to initialized globals in the constant
662 // address space by copying them to private and accessing that. It does not
663 // properly handle illegal types or vectors. The private vector loads are not
664 // scalarized, and the illegal scalars hit an assertion. This technique will not
665 // work well with large initializers, and this should eventually be
666 // removed. Initialized globals should be placed into a data section that the
667 // runtime will load into a buffer before the kernel is executed. Uses of the
668 // global need to be replaced with a pointer loaded from an implicit kernel
669 // argument into this buffer holding the copy of the data, which will remove the
670 // need for any of this.
671 SDValue AMDGPUTargetLowering::LowerConstantInitializer(const Constant* Init,
672 const GlobalValue *GV,
673 const SDValue &InitPtr,
675 SelectionDAG &DAG) const {
676 const DataLayout *TD = getDataLayout();
678 Type *InitTy = Init->getType();
680 if (const ConstantInt *CI = dyn_cast<ConstantInt>(Init)) {
681 EVT VT = EVT::getEVT(InitTy);
682 PointerType *PtrTy = PointerType::get(InitTy, AMDGPUAS::PRIVATE_ADDRESS);
683 return DAG.getStore(Chain, DL, DAG.getConstant(*CI, VT), InitPtr,
684 MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
685 TD->getPrefTypeAlignment(InitTy));
688 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(Init)) {
689 EVT VT = EVT::getEVT(CFP->getType());
690 PointerType *PtrTy = PointerType::get(CFP->getType(), 0);
691 return DAG.getStore(Chain, DL, DAG.getConstantFP(*CFP, VT), InitPtr,
692 MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
693 TD->getPrefTypeAlignment(CFP->getType()));
696 if (StructType *ST = dyn_cast<StructType>(InitTy)) {
697 const StructLayout *SL = TD->getStructLayout(ST);
699 EVT PtrVT = InitPtr.getValueType();
700 SmallVector<SDValue, 8> Chains;
702 for (unsigned I = 0, N = ST->getNumElements(); I != N; ++I) {
703 SDValue Offset = DAG.getConstant(SL->getElementOffset(I), PtrVT);
704 SDValue Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, InitPtr, Offset);
706 Constant *Elt = Init->getAggregateElement(I);
707 Chains.push_back(LowerConstantInitializer(Elt, GV, Ptr, Chain, DAG));
710 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains);
713 if (SequentialType *SeqTy = dyn_cast<SequentialType>(InitTy)) {
714 EVT PtrVT = InitPtr.getValueType();
716 unsigned NumElements;
717 if (ArrayType *AT = dyn_cast<ArrayType>(SeqTy))
718 NumElements = AT->getNumElements();
719 else if (VectorType *VT = dyn_cast<VectorType>(SeqTy))
720 NumElements = VT->getNumElements();
722 llvm_unreachable("Unexpected type");
724 unsigned EltSize = TD->getTypeAllocSize(SeqTy->getElementType());
725 SmallVector<SDValue, 8> Chains;
726 for (unsigned i = 0; i < NumElements; ++i) {
727 SDValue Offset = DAG.getConstant(i * EltSize, PtrVT);
728 SDValue Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, InitPtr, Offset);
730 Constant *Elt = Init->getAggregateElement(i);
731 Chains.push_back(LowerConstantInitializer(Elt, GV, Ptr, Chain, DAG));
734 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains);
737 if (isa<UndefValue>(Init)) {
738 EVT VT = EVT::getEVT(InitTy);
739 PointerType *PtrTy = PointerType::get(InitTy, AMDGPUAS::PRIVATE_ADDRESS);
740 return DAG.getStore(Chain, DL, DAG.getUNDEF(VT), InitPtr,
741 MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
742 TD->getPrefTypeAlignment(InitTy));
746 llvm_unreachable("Unhandled constant initializer");
749 static bool hasDefinedInitializer(const GlobalValue *GV) {
750 const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
751 if (!GVar || !GVar->hasInitializer())
754 if (isa<UndefValue>(GVar->getInitializer()))
760 SDValue AMDGPUTargetLowering::LowerGlobalAddress(AMDGPUMachineFunction* MFI,
762 SelectionDAG &DAG) const {
764 const DataLayout *TD = getDataLayout();
765 GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Op);
766 const GlobalValue *GV = G->getGlobal();
768 switch (G->getAddressSpace()) {
769 case AMDGPUAS::LOCAL_ADDRESS: {
770 // XXX: What does the value of G->getOffset() mean?
771 assert(G->getOffset() == 0 &&
772 "Do not know what to do with an non-zero offset");
774 // TODO: We could emit code to handle the initialization somewhere.
775 if (hasDefinedInitializer(GV))
779 if (MFI->LocalMemoryObjects.count(GV) == 0) {
780 uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType());
781 Offset = MFI->LDSSize;
782 MFI->LocalMemoryObjects[GV] = Offset;
783 // XXX: Account for alignment?
784 MFI->LDSSize += Size;
786 Offset = MFI->LocalMemoryObjects[GV];
789 return DAG.getConstant(Offset, getPointerTy(AMDGPUAS::LOCAL_ADDRESS));
791 case AMDGPUAS::CONSTANT_ADDRESS: {
792 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
793 Type *EltType = GV->getType()->getElementType();
794 unsigned Size = TD->getTypeAllocSize(EltType);
795 unsigned Alignment = TD->getPrefTypeAlignment(EltType);
797 MVT PrivPtrVT = getPointerTy(AMDGPUAS::PRIVATE_ADDRESS);
798 MVT ConstPtrVT = getPointerTy(AMDGPUAS::CONSTANT_ADDRESS);
800 int FI = FrameInfo->CreateStackObject(Size, Alignment, false);
801 SDValue InitPtr = DAG.getFrameIndex(FI, PrivPtrVT);
803 const GlobalVariable *Var = cast<GlobalVariable>(GV);
804 if (!Var->hasInitializer()) {
805 // This has no use, but bugpoint will hit it.
806 return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
809 const Constant *Init = Var->getInitializer();
810 SmallVector<SDNode*, 8> WorkList;
812 for (SDNode::use_iterator I = DAG.getEntryNode()->use_begin(),
813 E = DAG.getEntryNode()->use_end(); I != E; ++I) {
814 if (I->getOpcode() != AMDGPUISD::REGISTER_LOAD && I->getOpcode() != ISD::LOAD)
816 WorkList.push_back(*I);
818 SDValue Chain = LowerConstantInitializer(Init, GV, InitPtr, DAG.getEntryNode(), DAG);
819 for (SmallVector<SDNode*, 8>::iterator I = WorkList.begin(),
820 E = WorkList.end(); I != E; ++I) {
821 SmallVector<SDValue, 8> Ops;
822 Ops.push_back(Chain);
823 for (unsigned i = 1; i < (*I)->getNumOperands(); ++i) {
824 Ops.push_back((*I)->getOperand(i));
826 DAG.UpdateNodeOperands(*I, Ops);
828 return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op), ConstPtrVT);
832 const Function &Fn = *DAG.getMachineFunction().getFunction();
833 DiagnosticInfoUnsupported BadInit(Fn,
834 "initializer for address space");
835 DAG.getContext()->diagnose(BadInit);
839 SDValue AMDGPUTargetLowering::LowerCONCAT_VECTORS(SDValue Op,
840 SelectionDAG &DAG) const {
841 SmallVector<SDValue, 8> Args;
842 SDValue A = Op.getOperand(0);
843 SDValue B = Op.getOperand(1);
845 DAG.ExtractVectorElements(A, Args);
846 DAG.ExtractVectorElements(B, Args);
848 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(), Args);
851 SDValue AMDGPUTargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op,
852 SelectionDAG &DAG) const {
854 SmallVector<SDValue, 8> Args;
855 unsigned Start = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
856 EVT VT = Op.getValueType();
857 DAG.ExtractVectorElements(Op.getOperand(0), Args, Start,
858 VT.getVectorNumElements());
860 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(), Args);
863 SDValue AMDGPUTargetLowering::LowerFrameIndex(SDValue Op,
864 SelectionDAG &DAG) const {
866 MachineFunction &MF = DAG.getMachineFunction();
867 const AMDGPUFrameLowering *TFL = Subtarget->getFrameLowering();
869 FrameIndexSDNode *FIN = cast<FrameIndexSDNode>(Op);
871 unsigned FrameIndex = FIN->getIndex();
872 unsigned Offset = TFL->getFrameIndexOffset(MF, FrameIndex);
873 return DAG.getConstant(Offset * 4 * TFL->getStackWidth(MF),
877 SDValue AMDGPUTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
878 SelectionDAG &DAG) const {
879 unsigned IntrinsicID = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
881 EVT VT = Op.getValueType();
883 switch (IntrinsicID) {
885 case AMDGPUIntrinsic::AMDGPU_abs:
886 case AMDGPUIntrinsic::AMDIL_abs: // Legacy name.
887 return LowerIntrinsicIABS(Op, DAG);
888 case AMDGPUIntrinsic::AMDGPU_lrp:
889 return LowerIntrinsicLRP(Op, DAG);
891 case AMDGPUIntrinsic::AMDGPU_clamp:
892 case AMDGPUIntrinsic::AMDIL_clamp: // Legacy name.
893 return DAG.getNode(AMDGPUISD::CLAMP, DL, VT,
894 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
896 case Intrinsic::AMDGPU_div_scale: {
897 // 3rd parameter required to be a constant.
898 const ConstantSDNode *Param = dyn_cast<ConstantSDNode>(Op.getOperand(3));
900 return DAG.getUNDEF(VT);
902 // Translate to the operands expected by the machine instruction. The
903 // first parameter must be the same as the first instruction.
904 SDValue Numerator = Op.getOperand(1);
905 SDValue Denominator = Op.getOperand(2);
907 // Note this order is opposite of the machine instruction's operations,
908 // which is s0.f = Quotient, s1.f = Denominator, s2.f = Numerator. The
909 // intrinsic has the numerator as the first operand to match a normal
910 // division operation.
912 SDValue Src0 = Param->isAllOnesValue() ? Numerator : Denominator;
914 return DAG.getNode(AMDGPUISD::DIV_SCALE, DL, Op->getVTList(), Src0,
915 Denominator, Numerator);
918 case Intrinsic::AMDGPU_div_fmas:
919 return DAG.getNode(AMDGPUISD::DIV_FMAS, DL, VT,
920 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3),
923 case Intrinsic::AMDGPU_div_fixup:
924 return DAG.getNode(AMDGPUISD::DIV_FIXUP, DL, VT,
925 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
927 case Intrinsic::AMDGPU_trig_preop:
928 return DAG.getNode(AMDGPUISD::TRIG_PREOP, DL, VT,
929 Op.getOperand(1), Op.getOperand(2));
931 case Intrinsic::AMDGPU_rcp:
932 return DAG.getNode(AMDGPUISD::RCP, DL, VT, Op.getOperand(1));
934 case Intrinsic::AMDGPU_rsq:
935 return DAG.getNode(AMDGPUISD::RSQ, DL, VT, Op.getOperand(1));
937 case AMDGPUIntrinsic::AMDGPU_legacy_rsq:
938 return DAG.getNode(AMDGPUISD::RSQ_LEGACY, DL, VT, Op.getOperand(1));
940 case Intrinsic::AMDGPU_rsq_clamped:
941 if (Subtarget->getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
942 Type *Type = VT.getTypeForEVT(*DAG.getContext());
943 APFloat Max = APFloat::getLargest(Type->getFltSemantics());
944 APFloat Min = APFloat::getLargest(Type->getFltSemantics(), true);
946 SDValue Rsq = DAG.getNode(AMDGPUISD::RSQ, DL, VT, Op.getOperand(1));
947 SDValue Tmp = DAG.getNode(ISD::FMINNUM, DL, VT, Rsq,
948 DAG.getConstantFP(Max, VT));
949 return DAG.getNode(ISD::FMAXNUM, DL, VT, Tmp,
950 DAG.getConstantFP(Min, VT));
952 return DAG.getNode(AMDGPUISD::RSQ_CLAMPED, DL, VT, Op.getOperand(1));
955 case Intrinsic::AMDGPU_ldexp:
956 return DAG.getNode(AMDGPUISD::LDEXP, DL, VT, Op.getOperand(1),
959 case AMDGPUIntrinsic::AMDGPU_imax:
960 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Op.getOperand(1),
962 case AMDGPUIntrinsic::AMDGPU_umax:
963 return DAG.getNode(AMDGPUISD::UMAX, DL, VT, Op.getOperand(1),
965 case AMDGPUIntrinsic::AMDGPU_imin:
966 return DAG.getNode(AMDGPUISD::SMIN, DL, VT, Op.getOperand(1),
968 case AMDGPUIntrinsic::AMDGPU_umin:
969 return DAG.getNode(AMDGPUISD::UMIN, DL, VT, Op.getOperand(1),
972 case AMDGPUIntrinsic::AMDGPU_umul24:
973 return DAG.getNode(AMDGPUISD::MUL_U24, DL, VT,
974 Op.getOperand(1), Op.getOperand(2));
976 case AMDGPUIntrinsic::AMDGPU_imul24:
977 return DAG.getNode(AMDGPUISD::MUL_I24, DL, VT,
978 Op.getOperand(1), Op.getOperand(2));
980 case AMDGPUIntrinsic::AMDGPU_umad24:
981 return DAG.getNode(AMDGPUISD::MAD_U24, DL, VT,
982 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
984 case AMDGPUIntrinsic::AMDGPU_imad24:
985 return DAG.getNode(AMDGPUISD::MAD_I24, DL, VT,
986 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
988 case AMDGPUIntrinsic::AMDGPU_cvt_f32_ubyte0:
989 return DAG.getNode(AMDGPUISD::CVT_F32_UBYTE0, DL, VT, Op.getOperand(1));
991 case AMDGPUIntrinsic::AMDGPU_cvt_f32_ubyte1:
992 return DAG.getNode(AMDGPUISD::CVT_F32_UBYTE1, DL, VT, Op.getOperand(1));
994 case AMDGPUIntrinsic::AMDGPU_cvt_f32_ubyte2:
995 return DAG.getNode(AMDGPUISD::CVT_F32_UBYTE2, DL, VT, Op.getOperand(1));
997 case AMDGPUIntrinsic::AMDGPU_cvt_f32_ubyte3:
998 return DAG.getNode(AMDGPUISD::CVT_F32_UBYTE3, DL, VT, Op.getOperand(1));
1000 case AMDGPUIntrinsic::AMDGPU_bfe_i32:
1001 return DAG.getNode(AMDGPUISD::BFE_I32, DL, VT,
1006 case AMDGPUIntrinsic::AMDGPU_bfe_u32:
1007 return DAG.getNode(AMDGPUISD::BFE_U32, DL, VT,
1012 case AMDGPUIntrinsic::AMDGPU_bfi:
1013 return DAG.getNode(AMDGPUISD::BFI, DL, VT,
1018 case AMDGPUIntrinsic::AMDGPU_bfm:
1019 return DAG.getNode(AMDGPUISD::BFM, DL, VT,
1023 case AMDGPUIntrinsic::AMDGPU_brev:
1024 return DAG.getNode(AMDGPUISD::BREV, DL, VT, Op.getOperand(1));
1026 case Intrinsic::AMDGPU_class:
1027 return DAG.getNode(AMDGPUISD::FP_CLASS, DL, VT,
1028 Op.getOperand(1), Op.getOperand(2));
1030 case AMDGPUIntrinsic::AMDIL_exp: // Legacy name.
1031 return DAG.getNode(ISD::FEXP2, DL, VT, Op.getOperand(1));
1033 case AMDGPUIntrinsic::AMDIL_round_nearest: // Legacy name.
1034 return DAG.getNode(ISD::FRINT, DL, VT, Op.getOperand(1));
1035 case AMDGPUIntrinsic::AMDGPU_trunc: // Legacy name.
1036 return DAG.getNode(ISD::FTRUNC, DL, VT, Op.getOperand(1));
1040 ///IABS(a) = SMAX(sub(0, a), a)
1041 SDValue AMDGPUTargetLowering::LowerIntrinsicIABS(SDValue Op,
1042 SelectionDAG &DAG) const {
1044 EVT VT = Op.getValueType();
1045 SDValue Neg = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
1048 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Neg, Op.getOperand(1));
1051 /// Linear Interpolation
1052 /// LRP(a, b, c) = muladd(a, b, (1 - a) * c)
1053 SDValue AMDGPUTargetLowering::LowerIntrinsicLRP(SDValue Op,
1054 SelectionDAG &DAG) const {
1056 EVT VT = Op.getValueType();
1057 SDValue OneSubA = DAG.getNode(ISD::FSUB, DL, VT,
1058 DAG.getConstantFP(1.0f, MVT::f32),
1060 SDValue OneSubAC = DAG.getNode(ISD::FMUL, DL, VT, OneSubA,
1062 return DAG.getNode(ISD::FADD, DL, VT,
1063 DAG.getNode(ISD::FMUL, DL, VT, Op.getOperand(1), Op.getOperand(2)),
1067 /// \brief Generate Min/Max node
1068 SDValue AMDGPUTargetLowering::CombineFMinMaxLegacy(SDLoc DL,
1075 DAGCombinerInfo &DCI) const {
1076 if (Subtarget->getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
1079 if (!(LHS == True && RHS == False) && !(LHS == False && RHS == True))
1082 SelectionDAG &DAG = DCI.DAG;
1083 ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
1092 case ISD::SETFALSE2:
1101 return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, RHS, LHS);
1102 return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, LHS, RHS);
1108 // Ordered. Assume ordered for undefined.
1110 // Only do this after legalization to avoid interfering with other combines
1111 // which might occur.
1112 if (DCI.getDAGCombineLevel() < AfterLegalizeDAG &&
1113 !DCI.isCalledByLegalizer())
1116 // We need to permute the operands to get the correct NaN behavior. The
1117 // selected operand is the second one based on the failing compare with NaN,
1118 // so permute it based on the compare type the hardware uses.
1120 return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, LHS, RHS);
1121 return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, RHS, LHS);
1126 return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, RHS, LHS);
1127 return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, LHS, RHS);
1133 if (DCI.getDAGCombineLevel() < AfterLegalizeDAG &&
1134 !DCI.isCalledByLegalizer())
1138 return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, LHS, RHS);
1139 return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, RHS, LHS);
1141 case ISD::SETCC_INVALID:
1142 llvm_unreachable("Invalid setcc condcode!");
1147 /// \brief Generate Min/Max node
1148 SDValue AMDGPUTargetLowering::CombineIMinMax(SDLoc DL,
1155 SelectionDAG &DAG) const {
1156 if (!(LHS == True && RHS == False) && !(LHS == False && RHS == True))
1159 ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
1163 unsigned Opc = (LHS == True) ? AMDGPUISD::UMIN : AMDGPUISD::UMAX;
1164 return DAG.getNode(Opc, DL, VT, LHS, RHS);
1168 unsigned Opc = (LHS == True) ? AMDGPUISD::SMIN : AMDGPUISD::SMAX;
1169 return DAG.getNode(Opc, DL, VT, LHS, RHS);
1173 unsigned Opc = (LHS == True) ? AMDGPUISD::SMAX : AMDGPUISD::SMIN;
1174 return DAG.getNode(Opc, DL, VT, LHS, RHS);
1178 unsigned Opc = (LHS == True) ? AMDGPUISD::UMAX : AMDGPUISD::UMIN;
1179 return DAG.getNode(Opc, DL, VT, LHS, RHS);
1186 SDValue AMDGPUTargetLowering::ScalarizeVectorLoad(const SDValue Op,
1187 SelectionDAG &DAG) const {
1188 LoadSDNode *Load = cast<LoadSDNode>(Op);
1189 EVT MemVT = Load->getMemoryVT();
1190 EVT MemEltVT = MemVT.getVectorElementType();
1192 EVT LoadVT = Op.getValueType();
1193 EVT EltVT = LoadVT.getVectorElementType();
1194 EVT PtrVT = Load->getBasePtr().getValueType();
1196 unsigned NumElts = Load->getMemoryVT().getVectorNumElements();
1197 SmallVector<SDValue, 8> Loads;
1198 SmallVector<SDValue, 8> Chains;
1201 unsigned MemEltSize = MemEltVT.getStoreSize();
1202 MachinePointerInfo SrcValue(Load->getMemOperand()->getValue());
1204 for (unsigned i = 0; i < NumElts; ++i) {
1205 SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT, Load->getBasePtr(),
1206 DAG.getConstant(i * MemEltSize, PtrVT));
1209 = DAG.getExtLoad(Load->getExtensionType(), SL, EltVT,
1210 Load->getChain(), Ptr,
1211 SrcValue.getWithOffset(i * MemEltSize),
1212 MemEltVT, Load->isVolatile(), Load->isNonTemporal(),
1213 Load->isInvariant(), Load->getAlignment());
1214 Loads.push_back(NewLoad.getValue(0));
1215 Chains.push_back(NewLoad.getValue(1));
1219 DAG.getNode(ISD::BUILD_VECTOR, SL, LoadVT, Loads),
1220 DAG.getNode(ISD::TokenFactor, SL, MVT::Other, Chains)
1223 return DAG.getMergeValues(Ops, SL);
1226 SDValue AMDGPUTargetLowering::SplitVectorLoad(const SDValue Op,
1227 SelectionDAG &DAG) const {
1228 EVT VT = Op.getValueType();
1230 // If this is a 2 element vector, we really want to scalarize and not create
1231 // weird 1 element vectors.
1232 if (VT.getVectorNumElements() == 2)
1233 return ScalarizeVectorLoad(Op, DAG);
1235 LoadSDNode *Load = cast<LoadSDNode>(Op);
1236 SDValue BasePtr = Load->getBasePtr();
1237 EVT PtrVT = BasePtr.getValueType();
1238 EVT MemVT = Load->getMemoryVT();
1240 MachinePointerInfo SrcValue(Load->getMemOperand()->getValue());
1243 EVT LoMemVT, HiMemVT;
1246 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT);
1247 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemVT);
1248 std::tie(Lo, Hi) = DAG.SplitVector(Op, SL, LoVT, HiVT);
1250 = DAG.getExtLoad(Load->getExtensionType(), SL, LoVT,
1251 Load->getChain(), BasePtr,
1253 LoMemVT, Load->isVolatile(), Load->isNonTemporal(),
1254 Load->isInvariant(), Load->getAlignment());
1256 SDValue HiPtr = DAG.getNode(ISD::ADD, SL, PtrVT, BasePtr,
1257 DAG.getConstant(LoMemVT.getStoreSize(), PtrVT));
1260 = DAG.getExtLoad(Load->getExtensionType(), SL, HiVT,
1261 Load->getChain(), HiPtr,
1262 SrcValue.getWithOffset(LoMemVT.getStoreSize()),
1263 HiMemVT, Load->isVolatile(), Load->isNonTemporal(),
1264 Load->isInvariant(), Load->getAlignment());
1267 DAG.getNode(ISD::CONCAT_VECTORS, SL, VT, LoLoad, HiLoad),
1268 DAG.getNode(ISD::TokenFactor, SL, MVT::Other,
1269 LoLoad.getValue(1), HiLoad.getValue(1))
1272 return DAG.getMergeValues(Ops, SL);
1275 SDValue AMDGPUTargetLowering::MergeVectorStore(const SDValue &Op,
1276 SelectionDAG &DAG) const {
1277 StoreSDNode *Store = cast<StoreSDNode>(Op);
1278 EVT MemVT = Store->getMemoryVT();
1279 unsigned MemBits = MemVT.getSizeInBits();
1281 // Byte stores are really expensive, so if possible, try to pack 32-bit vector
1282 // truncating store into an i32 store.
1283 // XXX: We could also handle optimize other vector bitwidths.
1284 if (!MemVT.isVector() || MemBits > 32) {
1289 SDValue Value = Store->getValue();
1290 EVT VT = Value.getValueType();
1291 EVT ElemVT = VT.getVectorElementType();
1292 SDValue Ptr = Store->getBasePtr();
1293 EVT MemEltVT = MemVT.getVectorElementType();
1294 unsigned MemEltBits = MemEltVT.getSizeInBits();
1295 unsigned MemNumElements = MemVT.getVectorNumElements();
1296 unsigned PackedSize = MemVT.getStoreSizeInBits();
1297 SDValue Mask = DAG.getConstant((1 << MemEltBits) - 1, MVT::i32);
1299 assert(Value.getValueType().getScalarSizeInBits() >= 32);
1301 SDValue PackedValue;
1302 for (unsigned i = 0; i < MemNumElements; ++i) {
1303 SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElemVT, Value,
1304 DAG.getConstant(i, MVT::i32));
1305 Elt = DAG.getZExtOrTrunc(Elt, DL, MVT::i32);
1306 Elt = DAG.getNode(ISD::AND, DL, MVT::i32, Elt, Mask); // getZeroExtendInReg
1308 SDValue Shift = DAG.getConstant(MemEltBits * i, MVT::i32);
1309 Elt = DAG.getNode(ISD::SHL, DL, MVT::i32, Elt, Shift);
1314 PackedValue = DAG.getNode(ISD::OR, DL, MVT::i32, PackedValue, Elt);
1318 if (PackedSize < 32) {
1319 EVT PackedVT = EVT::getIntegerVT(*DAG.getContext(), PackedSize);
1320 return DAG.getTruncStore(Store->getChain(), DL, PackedValue, Ptr,
1321 Store->getMemOperand()->getPointerInfo(),
1323 Store->isNonTemporal(), Store->isVolatile(),
1324 Store->getAlignment());
1327 return DAG.getStore(Store->getChain(), DL, PackedValue, Ptr,
1328 Store->getMemOperand()->getPointerInfo(),
1329 Store->isVolatile(), Store->isNonTemporal(),
1330 Store->getAlignment());
1333 SDValue AMDGPUTargetLowering::ScalarizeVectorStore(SDValue Op,
1334 SelectionDAG &DAG) const {
1335 StoreSDNode *Store = cast<StoreSDNode>(Op);
1336 EVT MemEltVT = Store->getMemoryVT().getVectorElementType();
1337 EVT EltVT = Store->getValue().getValueType().getVectorElementType();
1338 EVT PtrVT = Store->getBasePtr().getValueType();
1339 unsigned NumElts = Store->getMemoryVT().getVectorNumElements();
1342 SmallVector<SDValue, 8> Chains;
1344 unsigned EltSize = MemEltVT.getStoreSize();
1345 MachinePointerInfo SrcValue(Store->getMemOperand()->getValue());
1347 for (unsigned i = 0, e = NumElts; i != e; ++i) {
1348 SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, EltVT,
1350 DAG.getConstant(i, MVT::i32));
1352 SDValue Offset = DAG.getConstant(i * MemEltVT.getStoreSize(), PtrVT);
1353 SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT, Store->getBasePtr(), Offset);
1355 DAG.getTruncStore(Store->getChain(), SL, Val, Ptr,
1356 SrcValue.getWithOffset(i * EltSize),
1357 MemEltVT, Store->isNonTemporal(), Store->isVolatile(),
1358 Store->getAlignment());
1359 Chains.push_back(NewStore);
1362 return DAG.getNode(ISD::TokenFactor, SL, MVT::Other, Chains);
1365 SDValue AMDGPUTargetLowering::SplitVectorStore(SDValue Op,
1366 SelectionDAG &DAG) const {
1367 StoreSDNode *Store = cast<StoreSDNode>(Op);
1368 SDValue Val = Store->getValue();
1369 EVT VT = Val.getValueType();
1371 // If this is a 2 element vector, we really want to scalarize and not create
1372 // weird 1 element vectors.
1373 if (VT.getVectorNumElements() == 2)
1374 return ScalarizeVectorStore(Op, DAG);
1376 EVT MemVT = Store->getMemoryVT();
1377 SDValue Chain = Store->getChain();
1378 SDValue BasePtr = Store->getBasePtr();
1382 EVT LoMemVT, HiMemVT;
1385 std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(VT);
1386 std::tie(LoMemVT, HiMemVT) = DAG.GetSplitDestVTs(MemVT);
1387 std::tie(Lo, Hi) = DAG.SplitVector(Val, SL, LoVT, HiVT);
1389 EVT PtrVT = BasePtr.getValueType();
1390 SDValue HiPtr = DAG.getNode(ISD::ADD, SL, PtrVT, BasePtr,
1391 DAG.getConstant(LoMemVT.getStoreSize(), PtrVT));
1393 MachinePointerInfo SrcValue(Store->getMemOperand()->getValue());
1395 = DAG.getTruncStore(Chain, SL, Lo,
1399 Store->isNonTemporal(),
1400 Store->isVolatile(),
1401 Store->getAlignment());
1403 = DAG.getTruncStore(Chain, SL, Hi,
1405 SrcValue.getWithOffset(LoMemVT.getStoreSize()),
1407 Store->isNonTemporal(),
1408 Store->isVolatile(),
1409 Store->getAlignment());
1411 return DAG.getNode(ISD::TokenFactor, SL, MVT::Other, LoStore, HiStore);
1415 SDValue AMDGPUTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
1417 LoadSDNode *Load = cast<LoadSDNode>(Op);
1418 ISD::LoadExtType ExtType = Load->getExtensionType();
1419 EVT VT = Op.getValueType();
1420 EVT MemVT = Load->getMemoryVT();
1422 if (ExtType == ISD::NON_EXTLOAD && VT.getSizeInBits() < 32) {
1423 assert(VT == MVT::i1 && "Only i1 non-extloads expected");
1424 // FIXME: Copied from PPC
1425 // First, load into 32 bits, then truncate to 1 bit.
1427 SDValue Chain = Load->getChain();
1428 SDValue BasePtr = Load->getBasePtr();
1429 MachineMemOperand *MMO = Load->getMemOperand();
1431 SDValue NewLD = DAG.getExtLoad(ISD::EXTLOAD, DL, MVT::i32, Chain,
1432 BasePtr, MVT::i8, MMO);
1435 DAG.getNode(ISD::TRUNCATE, DL, VT, NewLD),
1439 return DAG.getMergeValues(Ops, DL);
1442 if (Subtarget->getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS ||
1443 Load->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS ||
1444 ExtType == ISD::NON_EXTLOAD || Load->getMemoryVT().bitsGE(MVT::i32))
1448 SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, Load->getBasePtr(),
1449 DAG.getConstant(2, MVT::i32));
1450 SDValue Ret = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, Op.getValueType(),
1451 Load->getChain(), Ptr,
1452 DAG.getTargetConstant(0, MVT::i32),
1454 SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32,
1456 DAG.getConstant(0x3, MVT::i32));
1457 SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
1458 DAG.getConstant(3, MVT::i32));
1460 Ret = DAG.getNode(ISD::SRL, DL, MVT::i32, Ret, ShiftAmt);
1462 EVT MemEltVT = MemVT.getScalarType();
1463 if (ExtType == ISD::SEXTLOAD) {
1464 SDValue MemEltVTNode = DAG.getValueType(MemEltVT);
1467 DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, MVT::i32, Ret, MemEltVTNode),
1471 return DAG.getMergeValues(Ops, DL);
1475 DAG.getZeroExtendInReg(Ret, DL, MemEltVT),
1479 return DAG.getMergeValues(Ops, DL);
1482 SDValue AMDGPUTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
1484 SDValue Result = AMDGPUTargetLowering::MergeVectorStore(Op, DAG);
1485 if (Result.getNode()) {
1489 StoreSDNode *Store = cast<StoreSDNode>(Op);
1490 SDValue Chain = Store->getChain();
1491 if ((Store->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS ||
1492 Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS) &&
1493 Store->getValue().getValueType().isVector()) {
1494 return ScalarizeVectorStore(Op, DAG);
1497 EVT MemVT = Store->getMemoryVT();
1498 if (Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS &&
1499 MemVT.bitsLT(MVT::i32)) {
1501 if (Store->getMemoryVT() == MVT::i8) {
1503 } else if (Store->getMemoryVT() == MVT::i16) {
1506 SDValue BasePtr = Store->getBasePtr();
1507 SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, BasePtr,
1508 DAG.getConstant(2, MVT::i32));
1509 SDValue Dst = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, MVT::i32,
1510 Chain, Ptr, DAG.getTargetConstant(0, MVT::i32));
1512 SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32, BasePtr,
1513 DAG.getConstant(0x3, MVT::i32));
1515 SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
1516 DAG.getConstant(3, MVT::i32));
1518 SDValue SExtValue = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i32,
1521 SDValue MaskedValue = DAG.getZeroExtendInReg(SExtValue, DL, MemVT);
1523 SDValue ShiftedValue = DAG.getNode(ISD::SHL, DL, MVT::i32,
1524 MaskedValue, ShiftAmt);
1526 SDValue DstMask = DAG.getNode(ISD::SHL, DL, MVT::i32, DAG.getConstant(Mask, MVT::i32),
1528 DstMask = DAG.getNode(ISD::XOR, DL, MVT::i32, DstMask,
1529 DAG.getConstant(0xffffffff, MVT::i32));
1530 Dst = DAG.getNode(ISD::AND, DL, MVT::i32, Dst, DstMask);
1532 SDValue Value = DAG.getNode(ISD::OR, DL, MVT::i32, Dst, ShiftedValue);
1533 return DAG.getNode(AMDGPUISD::REGISTER_STORE, DL, MVT::Other,
1534 Chain, Value, Ptr, DAG.getTargetConstant(0, MVT::i32));
1539 // This is a shortcut for integer division because we have fast i32<->f32
1540 // conversions, and fast f32 reciprocal instructions. The fractional part of a
1541 // float is enough to accurately represent up to a 24-bit integer.
1542 SDValue AMDGPUTargetLowering::LowerDIVREM24(SDValue Op, SelectionDAG &DAG, bool sign) const {
1544 EVT VT = Op.getValueType();
1545 SDValue LHS = Op.getOperand(0);
1546 SDValue RHS = Op.getOperand(1);
1547 MVT IntVT = MVT::i32;
1548 MVT FltVT = MVT::f32;
1550 ISD::NodeType ToFp = sign ? ISD::SINT_TO_FP : ISD::UINT_TO_FP;
1551 ISD::NodeType ToInt = sign ? ISD::FP_TO_SINT : ISD::FP_TO_UINT;
1553 if (VT.isVector()) {
1554 unsigned NElts = VT.getVectorNumElements();
1555 IntVT = MVT::getVectorVT(MVT::i32, NElts);
1556 FltVT = MVT::getVectorVT(MVT::f32, NElts);
1559 unsigned BitSize = VT.getScalarType().getSizeInBits();
1561 SDValue jq = DAG.getConstant(1, IntVT);
1564 // char|short jq = ia ^ ib;
1565 jq = DAG.getNode(ISD::XOR, DL, VT, LHS, RHS);
1567 // jq = jq >> (bitsize - 2)
1568 jq = DAG.getNode(ISD::SRA, DL, VT, jq, DAG.getConstant(BitSize - 2, VT));
1571 jq = DAG.getNode(ISD::OR, DL, VT, jq, DAG.getConstant(1, VT));
1574 jq = DAG.getSExtOrTrunc(jq, DL, IntVT);
1577 // int ia = (int)LHS;
1579 DAG.getSExtOrTrunc(LHS, DL, IntVT) : DAG.getZExtOrTrunc(LHS, DL, IntVT);
1581 // int ib, (int)RHS;
1583 DAG.getSExtOrTrunc(RHS, DL, IntVT) : DAG.getZExtOrTrunc(RHS, DL, IntVT);
1585 // float fa = (float)ia;
1586 SDValue fa = DAG.getNode(ToFp, DL, FltVT, ia);
1588 // float fb = (float)ib;
1589 SDValue fb = DAG.getNode(ToFp, DL, FltVT, ib);
1591 // float fq = native_divide(fa, fb);
1592 SDValue fq = DAG.getNode(ISD::FMUL, DL, FltVT,
1593 fa, DAG.getNode(AMDGPUISD::RCP, DL, FltVT, fb));
1596 fq = DAG.getNode(ISD::FTRUNC, DL, FltVT, fq);
1598 // float fqneg = -fq;
1599 SDValue fqneg = DAG.getNode(ISD::FNEG, DL, FltVT, fq);
1601 // float fr = mad(fqneg, fb, fa);
1602 SDValue fr = DAG.getNode(ISD::FADD, DL, FltVT,
1603 DAG.getNode(ISD::FMUL, DL, FltVT, fqneg, fb), fa);
1605 // int iq = (int)fq;
1606 SDValue iq = DAG.getNode(ToInt, DL, IntVT, fq);
1609 fr = DAG.getNode(ISD::FABS, DL, FltVT, fr);
1612 fb = DAG.getNode(ISD::FABS, DL, FltVT, fb);
1614 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), VT);
1616 // int cv = fr >= fb;
1617 SDValue cv = DAG.getSetCC(DL, SetCCVT, fr, fb, ISD::SETOGE);
1619 // jq = (cv ? jq : 0);
1620 jq = DAG.getNode(ISD::SELECT, DL, VT, cv, jq, DAG.getConstant(0, VT));
1622 // dst = trunc/extend to legal type
1623 iq = sign ? DAG.getSExtOrTrunc(iq, DL, VT) : DAG.getZExtOrTrunc(iq, DL, VT);
1626 SDValue Div = DAG.getNode(ISD::ADD, DL, VT, iq, jq);
1628 // Rem needs compensation, it's easier to recompute it
1629 SDValue Rem = DAG.getNode(ISD::MUL, DL, VT, Div, RHS);
1630 Rem = DAG.getNode(ISD::SUB, DL, VT, LHS, Rem);
1636 return DAG.getMergeValues(Res, DL);
1639 void AMDGPUTargetLowering::LowerUDIVREM64(SDValue Op,
1641 SmallVectorImpl<SDValue> &Results) const {
1642 assert(Op.getValueType() == MVT::i64);
1645 EVT VT = Op.getValueType();
1646 EVT HalfVT = VT.getHalfSizedIntegerVT(*DAG.getContext());
1648 SDValue one = DAG.getConstant(1, HalfVT);
1649 SDValue zero = DAG.getConstant(0, HalfVT);
1652 SDValue LHS = Op.getOperand(0);
1653 SDValue LHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, zero);
1654 SDValue LHS_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, one);
1656 SDValue RHS = Op.getOperand(1);
1657 SDValue RHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, zero);
1658 SDValue RHS_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, one);
1660 if (VT == MVT::i64 &&
1661 DAG.MaskedValueIsZero(RHS, APInt::getHighBitsSet(64, 32)) &&
1662 DAG.MaskedValueIsZero(LHS, APInt::getHighBitsSet(64, 32))) {
1664 SDValue Res = DAG.getNode(ISD::UDIVREM, DL, DAG.getVTList(HalfVT, HalfVT),
1667 SDValue DIV = DAG.getNode(ISD::BUILD_PAIR, DL, VT, Res.getValue(0), zero);
1668 SDValue REM = DAG.getNode(ISD::BUILD_PAIR, DL, VT, Res.getValue(1), zero);
1669 Results.push_back(DIV);
1670 Results.push_back(REM);
1674 // Get Speculative values
1675 SDValue DIV_Part = DAG.getNode(ISD::UDIV, DL, HalfVT, LHS_Hi, RHS_Lo);
1676 SDValue REM_Part = DAG.getNode(ISD::UREM, DL, HalfVT, LHS_Hi, RHS_Lo);
1678 SDValue REM_Lo = DAG.getSelectCC(DL, RHS_Hi, zero, REM_Part, LHS_Hi, ISD::SETEQ);
1679 SDValue REM = DAG.getNode(ISD::BUILD_PAIR, DL, VT, REM_Lo, zero);
1681 SDValue DIV_Hi = DAG.getSelectCC(DL, RHS_Hi, zero, DIV_Part, zero, ISD::SETEQ);
1682 SDValue DIV_Lo = zero;
1684 const unsigned halfBitWidth = HalfVT.getSizeInBits();
1686 for (unsigned i = 0; i < halfBitWidth; ++i) {
1687 const unsigned bitPos = halfBitWidth - i - 1;
1688 SDValue POS = DAG.getConstant(bitPos, HalfVT);
1689 // Get value of high bit
1690 SDValue HBit = DAG.getNode(ISD::SRL, DL, HalfVT, LHS_Lo, POS);
1691 HBit = DAG.getNode(ISD::AND, DL, HalfVT, HBit, one);
1692 HBit = DAG.getNode(ISD::ZERO_EXTEND, DL, VT, HBit);
1695 REM = DAG.getNode(ISD::SHL, DL, VT, REM, DAG.getConstant(1, VT));
1697 REM = DAG.getNode(ISD::OR, DL, VT, REM, HBit);
1699 SDValue BIT = DAG.getConstant(1 << bitPos, HalfVT);
1700 SDValue realBIT = DAG.getSelectCC(DL, REM, RHS, BIT, zero, ISD::SETUGE);
1702 DIV_Lo = DAG.getNode(ISD::OR, DL, HalfVT, DIV_Lo, realBIT);
1705 SDValue REM_sub = DAG.getNode(ISD::SUB, DL, VT, REM, RHS);
1706 REM = DAG.getSelectCC(DL, REM, RHS, REM_sub, REM, ISD::SETUGE);
1709 SDValue DIV = DAG.getNode(ISD::BUILD_PAIR, DL, VT, DIV_Lo, DIV_Hi);
1710 Results.push_back(DIV);
1711 Results.push_back(REM);
1714 SDValue AMDGPUTargetLowering::LowerUDIVREM(SDValue Op,
1715 SelectionDAG &DAG) const {
1717 EVT VT = Op.getValueType();
1719 if (VT == MVT::i64) {
1720 SmallVector<SDValue, 2> Results;
1721 LowerUDIVREM64(Op, DAG, Results);
1722 return DAG.getMergeValues(Results, DL);
1725 SDValue Num = Op.getOperand(0);
1726 SDValue Den = Op.getOperand(1);
1728 if (VT == MVT::i32) {
1729 if (DAG.MaskedValueIsZero(Num, APInt::getHighBitsSet(32, 8)) &&
1730 DAG.MaskedValueIsZero(Den, APInt::getHighBitsSet(32, 8))) {
1731 // TODO: We technically could do this for i64, but shouldn't that just be
1732 // handled by something generally reducing 64-bit division on 32-bit
1733 // values to 32-bit?
1734 return LowerDIVREM24(Op, DAG, false);
1738 // RCP = URECIP(Den) = 2^32 / Den + e
1739 // e is rounding error.
1740 SDValue RCP = DAG.getNode(AMDGPUISD::URECIP, DL, VT, Den);
1742 // RCP_LO = mul(RCP, Den) */
1743 SDValue RCP_LO = DAG.getNode(ISD::MUL, DL, VT, RCP, Den);
1745 // RCP_HI = mulhu (RCP, Den) */
1746 SDValue RCP_HI = DAG.getNode(ISD::MULHU, DL, VT, RCP, Den);
1748 // NEG_RCP_LO = -RCP_LO
1749 SDValue NEG_RCP_LO = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
1752 // ABS_RCP_LO = (RCP_HI == 0 ? NEG_RCP_LO : RCP_LO)
1753 SDValue ABS_RCP_LO = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
1756 // Calculate the rounding error from the URECIP instruction
1757 // E = mulhu(ABS_RCP_LO, RCP)
1758 SDValue E = DAG.getNode(ISD::MULHU, DL, VT, ABS_RCP_LO, RCP);
1760 // RCP_A_E = RCP + E
1761 SDValue RCP_A_E = DAG.getNode(ISD::ADD, DL, VT, RCP, E);
1763 // RCP_S_E = RCP - E
1764 SDValue RCP_S_E = DAG.getNode(ISD::SUB, DL, VT, RCP, E);
1766 // Tmp0 = (RCP_HI == 0 ? RCP_A_E : RCP_SUB_E)
1767 SDValue Tmp0 = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
1770 // Quotient = mulhu(Tmp0, Num)
1771 SDValue Quotient = DAG.getNode(ISD::MULHU, DL, VT, Tmp0, Num);
1773 // Num_S_Remainder = Quotient * Den
1774 SDValue Num_S_Remainder = DAG.getNode(ISD::MUL, DL, VT, Quotient, Den);
1776 // Remainder = Num - Num_S_Remainder
1777 SDValue Remainder = DAG.getNode(ISD::SUB, DL, VT, Num, Num_S_Remainder);
1779 // Remainder_GE_Den = (Remainder >= Den ? -1 : 0)
1780 SDValue Remainder_GE_Den = DAG.getSelectCC(DL, Remainder, Den,
1781 DAG.getConstant(-1, VT),
1782 DAG.getConstant(0, VT),
1784 // Remainder_GE_Zero = (Num >= Num_S_Remainder ? -1 : 0)
1785 SDValue Remainder_GE_Zero = DAG.getSelectCC(DL, Num,
1787 DAG.getConstant(-1, VT),
1788 DAG.getConstant(0, VT),
1790 // Tmp1 = Remainder_GE_Den & Remainder_GE_Zero
1791 SDValue Tmp1 = DAG.getNode(ISD::AND, DL, VT, Remainder_GE_Den,
1794 // Calculate Division result:
1796 // Quotient_A_One = Quotient + 1
1797 SDValue Quotient_A_One = DAG.getNode(ISD::ADD, DL, VT, Quotient,
1798 DAG.getConstant(1, VT));
1800 // Quotient_S_One = Quotient - 1
1801 SDValue Quotient_S_One = DAG.getNode(ISD::SUB, DL, VT, Quotient,
1802 DAG.getConstant(1, VT));
1804 // Div = (Tmp1 == 0 ? Quotient : Quotient_A_One)
1805 SDValue Div = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
1806 Quotient, Quotient_A_One, ISD::SETEQ);
1808 // Div = (Remainder_GE_Zero == 0 ? Quotient_S_One : Div)
1809 Div = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
1810 Quotient_S_One, Div, ISD::SETEQ);
1812 // Calculate Rem result:
1814 // Remainder_S_Den = Remainder - Den
1815 SDValue Remainder_S_Den = DAG.getNode(ISD::SUB, DL, VT, Remainder, Den);
1817 // Remainder_A_Den = Remainder + Den
1818 SDValue Remainder_A_Den = DAG.getNode(ISD::ADD, DL, VT, Remainder, Den);
1820 // Rem = (Tmp1 == 0 ? Remainder : Remainder_S_Den)
1821 SDValue Rem = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
1822 Remainder, Remainder_S_Den, ISD::SETEQ);
1824 // Rem = (Remainder_GE_Zero == 0 ? Remainder_A_Den : Rem)
1825 Rem = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
1826 Remainder_A_Den, Rem, ISD::SETEQ);
1831 return DAG.getMergeValues(Ops, DL);
1834 SDValue AMDGPUTargetLowering::LowerSDIVREM(SDValue Op,
1835 SelectionDAG &DAG) const {
1837 EVT VT = Op.getValueType();
1839 SDValue LHS = Op.getOperand(0);
1840 SDValue RHS = Op.getOperand(1);
1842 SDValue Zero = DAG.getConstant(0, VT);
1843 SDValue NegOne = DAG.getConstant(-1, VT);
1845 if (VT == MVT::i32 &&
1846 DAG.ComputeNumSignBits(LHS) > 8 &&
1847 DAG.ComputeNumSignBits(RHS) > 8) {
1848 return LowerDIVREM24(Op, DAG, true);
1850 if (VT == MVT::i64 &&
1851 DAG.ComputeNumSignBits(LHS) > 32 &&
1852 DAG.ComputeNumSignBits(RHS) > 32) {
1853 EVT HalfVT = VT.getHalfSizedIntegerVT(*DAG.getContext());
1856 SDValue LHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, Zero);
1857 SDValue RHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, Zero);
1858 SDValue DIVREM = DAG.getNode(ISD::SDIVREM, DL, DAG.getVTList(HalfVT, HalfVT),
1861 DAG.getNode(ISD::SIGN_EXTEND, DL, VT, DIVREM.getValue(0)),
1862 DAG.getNode(ISD::SIGN_EXTEND, DL, VT, DIVREM.getValue(1))
1864 return DAG.getMergeValues(Res, DL);
1867 SDValue LHSign = DAG.getSelectCC(DL, LHS, Zero, NegOne, Zero, ISD::SETLT);
1868 SDValue RHSign = DAG.getSelectCC(DL, RHS, Zero, NegOne, Zero, ISD::SETLT);
1869 SDValue DSign = DAG.getNode(ISD::XOR, DL, VT, LHSign, RHSign);
1870 SDValue RSign = LHSign; // Remainder sign is the same as LHS
1872 LHS = DAG.getNode(ISD::ADD, DL, VT, LHS, LHSign);
1873 RHS = DAG.getNode(ISD::ADD, DL, VT, RHS, RHSign);
1875 LHS = DAG.getNode(ISD::XOR, DL, VT, LHS, LHSign);
1876 RHS = DAG.getNode(ISD::XOR, DL, VT, RHS, RHSign);
1878 SDValue Div = DAG.getNode(ISD::UDIVREM, DL, DAG.getVTList(VT, VT), LHS, RHS);
1879 SDValue Rem = Div.getValue(1);
1881 Div = DAG.getNode(ISD::XOR, DL, VT, Div, DSign);
1882 Rem = DAG.getNode(ISD::XOR, DL, VT, Rem, RSign);
1884 Div = DAG.getNode(ISD::SUB, DL, VT, Div, DSign);
1885 Rem = DAG.getNode(ISD::SUB, DL, VT, Rem, RSign);
1891 return DAG.getMergeValues(Res, DL);
1894 // (frem x, y) -> (fsub x, (fmul (ftrunc (fdiv x, y)), y))
1895 SDValue AMDGPUTargetLowering::LowerFREM(SDValue Op, SelectionDAG &DAG) const {
1897 EVT VT = Op.getValueType();
1898 SDValue X = Op.getOperand(0);
1899 SDValue Y = Op.getOperand(1);
1901 SDValue Div = DAG.getNode(ISD::FDIV, SL, VT, X, Y);
1902 SDValue Floor = DAG.getNode(ISD::FTRUNC, SL, VT, Div);
1903 SDValue Mul = DAG.getNode(ISD::FMUL, SL, VT, Floor, Y);
1905 return DAG.getNode(ISD::FSUB, SL, VT, X, Mul);
1908 SDValue AMDGPUTargetLowering::LowerFCEIL(SDValue Op, SelectionDAG &DAG) const {
1910 SDValue Src = Op.getOperand(0);
1912 // result = trunc(src)
1913 // if (src > 0.0 && src != result)
1916 SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, MVT::f64, Src);
1918 const SDValue Zero = DAG.getConstantFP(0.0, MVT::f64);
1919 const SDValue One = DAG.getConstantFP(1.0, MVT::f64);
1921 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::f64);
1923 SDValue Lt0 = DAG.getSetCC(SL, SetCCVT, Src, Zero, ISD::SETOGT);
1924 SDValue NeTrunc = DAG.getSetCC(SL, SetCCVT, Src, Trunc, ISD::SETONE);
1925 SDValue And = DAG.getNode(ISD::AND, SL, SetCCVT, Lt0, NeTrunc);
1927 SDValue Add = DAG.getNode(ISD::SELECT, SL, MVT::f64, And, One, Zero);
1928 return DAG.getNode(ISD::FADD, SL, MVT::f64, Trunc, Add);
1931 static SDValue extractF64Exponent(SDValue Hi, SDLoc SL, SelectionDAG &DAG) {
1932 const unsigned FractBits = 52;
1933 const unsigned ExpBits = 11;
1935 SDValue ExpPart = DAG.getNode(AMDGPUISD::BFE_U32, SL, MVT::i32,
1937 DAG.getConstant(FractBits - 32, MVT::i32),
1938 DAG.getConstant(ExpBits, MVT::i32));
1939 SDValue Exp = DAG.getNode(ISD::SUB, SL, MVT::i32, ExpPart,
1940 DAG.getConstant(1023, MVT::i32));
1945 SDValue AMDGPUTargetLowering::LowerFTRUNC(SDValue Op, SelectionDAG &DAG) const {
1947 SDValue Src = Op.getOperand(0);
1949 assert(Op.getValueType() == MVT::f64);
1951 const SDValue Zero = DAG.getConstant(0, MVT::i32);
1952 const SDValue One = DAG.getConstant(1, MVT::i32);
1954 SDValue VecSrc = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Src);
1956 // Extract the upper half, since this is where we will find the sign and
1958 SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, VecSrc, One);
1960 SDValue Exp = extractF64Exponent(Hi, SL, DAG);
1962 const unsigned FractBits = 52;
1964 // Extract the sign bit.
1965 const SDValue SignBitMask = DAG.getConstant(UINT32_C(1) << 31, MVT::i32);
1966 SDValue SignBit = DAG.getNode(ISD::AND, SL, MVT::i32, Hi, SignBitMask);
1968 // Extend back to to 64-bits.
1969 SDValue SignBit64 = DAG.getNode(ISD::BUILD_VECTOR, SL, MVT::v2i32,
1971 SignBit64 = DAG.getNode(ISD::BITCAST, SL, MVT::i64, SignBit64);
1973 SDValue BcInt = DAG.getNode(ISD::BITCAST, SL, MVT::i64, Src);
1974 const SDValue FractMask
1975 = DAG.getConstant((UINT64_C(1) << FractBits) - 1, MVT::i64);
1977 SDValue Shr = DAG.getNode(ISD::SRA, SL, MVT::i64, FractMask, Exp);
1978 SDValue Not = DAG.getNOT(SL, Shr, MVT::i64);
1979 SDValue Tmp0 = DAG.getNode(ISD::AND, SL, MVT::i64, BcInt, Not);
1981 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::i32);
1983 const SDValue FiftyOne = DAG.getConstant(FractBits - 1, MVT::i32);
1985 SDValue ExpLt0 = DAG.getSetCC(SL, SetCCVT, Exp, Zero, ISD::SETLT);
1986 SDValue ExpGt51 = DAG.getSetCC(SL, SetCCVT, Exp, FiftyOne, ISD::SETGT);
1988 SDValue Tmp1 = DAG.getNode(ISD::SELECT, SL, MVT::i64, ExpLt0, SignBit64, Tmp0);
1989 SDValue Tmp2 = DAG.getNode(ISD::SELECT, SL, MVT::i64, ExpGt51, BcInt, Tmp1);
1991 return DAG.getNode(ISD::BITCAST, SL, MVT::f64, Tmp2);
1994 SDValue AMDGPUTargetLowering::LowerFRINT(SDValue Op, SelectionDAG &DAG) const {
1996 SDValue Src = Op.getOperand(0);
1998 assert(Op.getValueType() == MVT::f64);
2000 APFloat C1Val(APFloat::IEEEdouble, "0x1.0p+52");
2001 SDValue C1 = DAG.getConstantFP(C1Val, MVT::f64);
2002 SDValue CopySign = DAG.getNode(ISD::FCOPYSIGN, SL, MVT::f64, C1, Src);
2004 SDValue Tmp1 = DAG.getNode(ISD::FADD, SL, MVT::f64, Src, CopySign);
2005 SDValue Tmp2 = DAG.getNode(ISD::FSUB, SL, MVT::f64, Tmp1, CopySign);
2007 SDValue Fabs = DAG.getNode(ISD::FABS, SL, MVT::f64, Src);
2009 APFloat C2Val(APFloat::IEEEdouble, "0x1.fffffffffffffp+51");
2010 SDValue C2 = DAG.getConstantFP(C2Val, MVT::f64);
2012 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::f64);
2013 SDValue Cond = DAG.getSetCC(SL, SetCCVT, Fabs, C2, ISD::SETOGT);
2015 return DAG.getSelect(SL, MVT::f64, Cond, Src, Tmp2);
2018 SDValue AMDGPUTargetLowering::LowerFNEARBYINT(SDValue Op, SelectionDAG &DAG) const {
2019 // FNEARBYINT and FRINT are the same, except in their handling of FP
2020 // exceptions. Those aren't really meaningful for us, and OpenCL only has
2021 // rint, so just treat them as equivalent.
2022 return DAG.getNode(ISD::FRINT, SDLoc(Op), Op.getValueType(), Op.getOperand(0));
2025 // XXX - May require not supporting f32 denormals?
2026 SDValue AMDGPUTargetLowering::LowerFROUND32(SDValue Op, SelectionDAG &DAG) const {
2028 SDValue X = Op.getOperand(0);
2030 SDValue T = DAG.getNode(ISD::FTRUNC, SL, MVT::f32, X);
2032 SDValue Diff = DAG.getNode(ISD::FSUB, SL, MVT::f32, X, T);
2034 SDValue AbsDiff = DAG.getNode(ISD::FABS, SL, MVT::f32, Diff);
2036 const SDValue Zero = DAG.getConstantFP(0.0, MVT::f32);
2037 const SDValue One = DAG.getConstantFP(1.0, MVT::f32);
2038 const SDValue Half = DAG.getConstantFP(0.5, MVT::f32);
2040 SDValue SignOne = DAG.getNode(ISD::FCOPYSIGN, SL, MVT::f32, One, X);
2042 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::f32);
2044 SDValue Cmp = DAG.getSetCC(SL, SetCCVT, AbsDiff, Half, ISD::SETOGE);
2046 SDValue Sel = DAG.getNode(ISD::SELECT, SL, MVT::f32, Cmp, SignOne, Zero);
2048 return DAG.getNode(ISD::FADD, SL, MVT::f32, T, Sel);
2051 SDValue AMDGPUTargetLowering::LowerFROUND64(SDValue Op, SelectionDAG &DAG) const {
2053 SDValue X = Op.getOperand(0);
2055 SDValue L = DAG.getNode(ISD::BITCAST, SL, MVT::i64, X);
2057 const SDValue Zero = DAG.getConstant(0, MVT::i32);
2058 const SDValue One = DAG.getConstant(1, MVT::i32);
2059 const SDValue NegOne = DAG.getConstant(-1, MVT::i32);
2060 const SDValue FiftyOne = DAG.getConstant(51, MVT::i32);
2061 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::i32);
2064 SDValue BC = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, X);
2066 SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, BC, One);
2068 SDValue Exp = extractF64Exponent(Hi, SL, DAG);
2070 const SDValue Mask = DAG.getConstant(INT64_C(0x000fffffffffffff), MVT::i64);
2072 SDValue M = DAG.getNode(ISD::SRA, SL, MVT::i64, Mask, Exp);
2073 SDValue D = DAG.getNode(ISD::SRA, SL, MVT::i64,
2074 DAG.getConstant(INT64_C(0x0008000000000000), MVT::i64),
2077 SDValue Tmp0 = DAG.getNode(ISD::AND, SL, MVT::i64, L, M);
2078 SDValue Tmp1 = DAG.getSetCC(SL, SetCCVT,
2079 DAG.getConstant(0, MVT::i64), Tmp0,
2082 SDValue Tmp2 = DAG.getNode(ISD::SELECT, SL, MVT::i64, Tmp1,
2083 D, DAG.getConstant(0, MVT::i64));
2084 SDValue K = DAG.getNode(ISD::ADD, SL, MVT::i64, L, Tmp2);
2086 K = DAG.getNode(ISD::AND, SL, MVT::i64, K, DAG.getNOT(SL, M, MVT::i64));
2087 K = DAG.getNode(ISD::BITCAST, SL, MVT::f64, K);
2089 SDValue ExpLt0 = DAG.getSetCC(SL, SetCCVT, Exp, Zero, ISD::SETLT);
2090 SDValue ExpGt51 = DAG.getSetCC(SL, SetCCVT, Exp, FiftyOne, ISD::SETGT);
2091 SDValue ExpEqNegOne = DAG.getSetCC(SL, SetCCVT, NegOne, Exp, ISD::SETEQ);
2093 SDValue Mag = DAG.getNode(ISD::SELECT, SL, MVT::f64,
2095 DAG.getConstantFP(1.0, MVT::f64),
2096 DAG.getConstantFP(0.0, MVT::f64));
2098 SDValue S = DAG.getNode(ISD::FCOPYSIGN, SL, MVT::f64, Mag, X);
2100 K = DAG.getNode(ISD::SELECT, SL, MVT::f64, ExpLt0, S, K);
2101 K = DAG.getNode(ISD::SELECT, SL, MVT::f64, ExpGt51, X, K);
2106 SDValue AMDGPUTargetLowering::LowerFROUND(SDValue Op, SelectionDAG &DAG) const {
2107 EVT VT = Op.getValueType();
2110 return LowerFROUND32(Op, DAG);
2113 return LowerFROUND64(Op, DAG);
2115 llvm_unreachable("unhandled type");
2118 SDValue AMDGPUTargetLowering::LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const {
2120 SDValue Src = Op.getOperand(0);
2122 // result = trunc(src);
2123 // if (src < 0.0 && src != result)
2126 SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, MVT::f64, Src);
2128 const SDValue Zero = DAG.getConstantFP(0.0, MVT::f64);
2129 const SDValue NegOne = DAG.getConstantFP(-1.0, MVT::f64);
2131 EVT SetCCVT = getSetCCResultType(*DAG.getContext(), MVT::f64);
2133 SDValue Lt0 = DAG.getSetCC(SL, SetCCVT, Src, Zero, ISD::SETOLT);
2134 SDValue NeTrunc = DAG.getSetCC(SL, SetCCVT, Src, Trunc, ISD::SETONE);
2135 SDValue And = DAG.getNode(ISD::AND, SL, SetCCVT, Lt0, NeTrunc);
2137 SDValue Add = DAG.getNode(ISD::SELECT, SL, MVT::f64, And, NegOne, Zero);
2138 return DAG.getNode(ISD::FADD, SL, MVT::f64, Trunc, Add);
2141 SDValue AMDGPUTargetLowering::LowerINT_TO_FP64(SDValue Op, SelectionDAG &DAG,
2142 bool Signed) const {
2144 SDValue Src = Op.getOperand(0);
2146 SDValue BC = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Src);
2148 SDValue Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, BC,
2149 DAG.getConstant(0, MVT::i32));
2150 SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, BC,
2151 DAG.getConstant(1, MVT::i32));
2153 SDValue CvtHi = DAG.getNode(Signed ? ISD::SINT_TO_FP : ISD::UINT_TO_FP,
2156 SDValue CvtLo = DAG.getNode(ISD::UINT_TO_FP, SL, MVT::f64, Lo);
2158 SDValue LdExp = DAG.getNode(AMDGPUISD::LDEXP, SL, MVT::f64, CvtHi,
2159 DAG.getConstant(32, MVT::i32));
2161 return DAG.getNode(ISD::FADD, SL, MVT::f64, LdExp, CvtLo);
2164 SDValue AMDGPUTargetLowering::LowerUINT_TO_FP(SDValue Op,
2165 SelectionDAG &DAG) const {
2166 SDValue S0 = Op.getOperand(0);
2167 if (S0.getValueType() != MVT::i64)
2170 EVT DestVT = Op.getValueType();
2171 if (DestVT == MVT::f64)
2172 return LowerINT_TO_FP64(Op, DAG, false);
2174 assert(DestVT == MVT::f32);
2178 // f32 uint_to_fp i64
2179 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
2180 DAG.getConstant(0, MVT::i32));
2181 SDValue FloatLo = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Lo);
2182 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
2183 DAG.getConstant(1, MVT::i32));
2184 SDValue FloatHi = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Hi);
2185 FloatHi = DAG.getNode(ISD::FMUL, DL, MVT::f32, FloatHi,
2186 DAG.getConstantFP(4294967296.0f, MVT::f32)); // 2^32
2187 return DAG.getNode(ISD::FADD, DL, MVT::f32, FloatLo, FloatHi);
2190 SDValue AMDGPUTargetLowering::LowerSINT_TO_FP(SDValue Op,
2191 SelectionDAG &DAG) const {
2192 SDValue Src = Op.getOperand(0);
2193 if (Src.getValueType() == MVT::i64 && Op.getValueType() == MVT::f64)
2194 return LowerINT_TO_FP64(Op, DAG, true);
2199 SDValue AMDGPUTargetLowering::LowerFP64_TO_INT(SDValue Op, SelectionDAG &DAG,
2200 bool Signed) const {
2203 SDValue Src = Op.getOperand(0);
2205 SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, MVT::f64, Src);
2208 = DAG.getConstantFP(BitsToDouble(UINT64_C(0x3df0000000000000)), MVT::f64);
2210 = DAG.getConstantFP(BitsToDouble(UINT64_C(0xc1f0000000000000)), MVT::f64);
2212 SDValue Mul = DAG.getNode(ISD::FMUL, SL, MVT::f64, Trunc, K0);
2214 SDValue FloorMul = DAG.getNode(ISD::FFLOOR, SL, MVT::f64, Mul);
2217 SDValue Fma = DAG.getNode(ISD::FMA, SL, MVT::f64, FloorMul, K1, Trunc);
2219 SDValue Hi = DAG.getNode(Signed ? ISD::FP_TO_SINT : ISD::FP_TO_UINT, SL,
2220 MVT::i32, FloorMul);
2221 SDValue Lo = DAG.getNode(ISD::FP_TO_UINT, SL, MVT::i32, Fma);
2223 SDValue Result = DAG.getNode(ISD::BUILD_VECTOR, SL, MVT::v2i32, Lo, Hi);
2225 return DAG.getNode(ISD::BITCAST, SL, MVT::i64, Result);
2228 SDValue AMDGPUTargetLowering::LowerFP_TO_SINT(SDValue Op,
2229 SelectionDAG &DAG) const {
2230 SDValue Src = Op.getOperand(0);
2232 if (Op.getValueType() == MVT::i64 && Src.getValueType() == MVT::f64)
2233 return LowerFP64_TO_INT(Op, DAG, true);
2238 SDValue AMDGPUTargetLowering::LowerFP_TO_UINT(SDValue Op,
2239 SelectionDAG &DAG) const {
2240 SDValue Src = Op.getOperand(0);
2242 if (Op.getValueType() == MVT::i64 && Src.getValueType() == MVT::f64)
2243 return LowerFP64_TO_INT(Op, DAG, false);
2248 SDValue AMDGPUTargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
2249 SelectionDAG &DAG) const {
2250 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
2251 MVT VT = Op.getSimpleValueType();
2252 MVT ScalarVT = VT.getScalarType();
2257 SDValue Src = Op.getOperand(0);
2260 // TODO: Don't scalarize on Evergreen?
2261 unsigned NElts = VT.getVectorNumElements();
2262 SmallVector<SDValue, 8> Args;
2263 DAG.ExtractVectorElements(Src, Args, 0, NElts);
2265 SDValue VTOp = DAG.getValueType(ExtraVT.getScalarType());
2266 for (unsigned I = 0; I < NElts; ++I)
2267 Args[I] = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, ScalarVT, Args[I], VTOp);
2269 return DAG.getNode(ISD::BUILD_VECTOR, DL, VT, Args);
2272 //===----------------------------------------------------------------------===//
2273 // Custom DAG optimizations
2274 //===----------------------------------------------------------------------===//
2276 static bool isU24(SDValue Op, SelectionDAG &DAG) {
2277 APInt KnownZero, KnownOne;
2278 EVT VT = Op.getValueType();
2279 DAG.computeKnownBits(Op, KnownZero, KnownOne);
2281 return (VT.getSizeInBits() - KnownZero.countLeadingOnes()) <= 24;
2284 static bool isI24(SDValue Op, SelectionDAG &DAG) {
2285 EVT VT = Op.getValueType();
2287 // In order for this to be a signed 24-bit value, bit 23, must
2289 return VT.getSizeInBits() >= 24 && // Types less than 24-bit should be treated
2290 // as unsigned 24-bit values.
2291 (VT.getSizeInBits() - DAG.ComputeNumSignBits(Op)) < 24;
2294 static void simplifyI24(SDValue Op, TargetLowering::DAGCombinerInfo &DCI) {
2296 SelectionDAG &DAG = DCI.DAG;
2297 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
2298 EVT VT = Op.getValueType();
2300 APInt Demanded = APInt::getLowBitsSet(VT.getSizeInBits(), 24);
2301 APInt KnownZero, KnownOne;
2302 TargetLowering::TargetLoweringOpt TLO(DAG, true, true);
2303 if (TLI.SimplifyDemandedBits(Op, Demanded, KnownZero, KnownOne, TLO))
2304 DCI.CommitTargetLoweringOpt(TLO);
2307 template <typename IntTy>
2308 static SDValue constantFoldBFE(SelectionDAG &DAG, IntTy Src0,
2309 uint32_t Offset, uint32_t Width) {
2310 if (Width + Offset < 32) {
2311 uint32_t Shl = static_cast<uint32_t>(Src0) << (32 - Offset - Width);
2312 IntTy Result = static_cast<IntTy>(Shl) >> (32 - Width);
2313 return DAG.getConstant(Result, MVT::i32);
2316 return DAG.getConstant(Src0 >> Offset, MVT::i32);
2319 static bool usesAllNormalStores(SDNode *LoadVal) {
2320 for (SDNode::use_iterator I = LoadVal->use_begin(); !I.atEnd(); ++I) {
2321 if (!ISD::isNormalStore(*I))
2328 // If we have a copy of an illegal type, replace it with a load / store of an
2329 // equivalently sized legal type. This avoids intermediate bit pack / unpack
2330 // instructions emitted when handling extloads and truncstores. Ideally we could
2331 // recognize the pack / unpack pattern to eliminate it.
2332 SDValue AMDGPUTargetLowering::performStoreCombine(SDNode *N,
2333 DAGCombinerInfo &DCI) const {
2334 if (!DCI.isBeforeLegalize())
2337 StoreSDNode *SN = cast<StoreSDNode>(N);
2338 SDValue Value = SN->getValue();
2339 EVT VT = Value.getValueType();
2341 if (isTypeLegal(VT) || SN->isVolatile() ||
2342 !ISD::isNormalLoad(Value.getNode()) || VT.getSizeInBits() < 8)
2345 LoadSDNode *LoadVal = cast<LoadSDNode>(Value);
2346 if (LoadVal->isVolatile() || !usesAllNormalStores(LoadVal))
2349 EVT MemVT = LoadVal->getMemoryVT();
2352 SelectionDAG &DAG = DCI.DAG;
2353 EVT LoadVT = getEquivalentMemType(*DAG.getContext(), MemVT);
2355 SDValue NewLoad = DAG.getLoad(ISD::UNINDEXED, ISD::NON_EXTLOAD,
2357 LoadVal->getChain(),
2358 LoadVal->getBasePtr(),
2359 LoadVal->getOffset(),
2361 LoadVal->getMemOperand());
2363 SDValue CastLoad = DAG.getNode(ISD::BITCAST, SL, VT, NewLoad.getValue(0));
2364 DCI.CombineTo(LoadVal, CastLoad, NewLoad.getValue(1), false);
2366 return DAG.getStore(SN->getChain(), SL, NewLoad,
2367 SN->getBasePtr(), SN->getMemOperand());
2370 SDValue AMDGPUTargetLowering::performMulCombine(SDNode *N,
2371 DAGCombinerInfo &DCI) const {
2372 EVT VT = N->getValueType(0);
2374 if (VT.isVector() || VT.getSizeInBits() > 32)
2377 SelectionDAG &DAG = DCI.DAG;
2380 SDValue N0 = N->getOperand(0);
2381 SDValue N1 = N->getOperand(1);
2384 if (Subtarget->hasMulU24() && isU24(N0, DAG) && isU24(N1, DAG)) {
2385 N0 = DAG.getZExtOrTrunc(N0, DL, MVT::i32);
2386 N1 = DAG.getZExtOrTrunc(N1, DL, MVT::i32);
2387 Mul = DAG.getNode(AMDGPUISD::MUL_U24, DL, MVT::i32, N0, N1);
2388 } else if (Subtarget->hasMulI24() && isI24(N0, DAG) && isI24(N1, DAG)) {
2389 N0 = DAG.getSExtOrTrunc(N0, DL, MVT::i32);
2390 N1 = DAG.getSExtOrTrunc(N1, DL, MVT::i32);
2391 Mul = DAG.getNode(AMDGPUISD::MUL_I24, DL, MVT::i32, N0, N1);
2396 // We need to use sext even for MUL_U24, because MUL_U24 is used
2397 // for signed multiply of 8 and 16-bit types.
2398 return DAG.getSExtOrTrunc(Mul, DL, VT);
2401 SDValue AMDGPUTargetLowering::PerformDAGCombine(SDNode *N,
2402 DAGCombinerInfo &DCI) const {
2403 SelectionDAG &DAG = DCI.DAG;
2406 switch(N->getOpcode()) {
2409 return performMulCombine(N, DCI);
2410 case AMDGPUISD::MUL_I24:
2411 case AMDGPUISD::MUL_U24: {
2412 SDValue N0 = N->getOperand(0);
2413 SDValue N1 = N->getOperand(1);
2414 simplifyI24(N0, DCI);
2415 simplifyI24(N1, DCI);
2419 SDValue Cond = N->getOperand(0);
2420 if (Cond.getOpcode() == ISD::SETCC && Cond.hasOneUse()) {
2422 EVT VT = N->getValueType(0);
2423 SDValue LHS = Cond.getOperand(0);
2424 SDValue RHS = Cond.getOperand(1);
2425 SDValue CC = Cond.getOperand(2);
2427 SDValue True = N->getOperand(1);
2428 SDValue False = N->getOperand(2);
2431 return CombineFMinMaxLegacy(DL, VT, LHS, RHS, True, False, CC, DCI);
2433 // TODO: Implement min / max Evergreen instructions.
2434 if (VT == MVT::i32 &&
2435 Subtarget->getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) {
2436 return CombineIMinMax(DL, VT, LHS, RHS, True, False, CC, DAG);
2442 case AMDGPUISD::BFE_I32:
2443 case AMDGPUISD::BFE_U32: {
2444 assert(!N->getValueType(0).isVector() &&
2445 "Vector handling of BFE not implemented");
2446 ConstantSDNode *Width = dyn_cast<ConstantSDNode>(N->getOperand(2));
2450 uint32_t WidthVal = Width->getZExtValue() & 0x1f;
2452 return DAG.getConstant(0, MVT::i32);
2454 ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1));
2458 SDValue BitsFrom = N->getOperand(0);
2459 uint32_t OffsetVal = Offset->getZExtValue() & 0x1f;
2461 bool Signed = N->getOpcode() == AMDGPUISD::BFE_I32;
2463 if (OffsetVal == 0) {
2464 // This is already sign / zero extended, so try to fold away extra BFEs.
2465 unsigned SignBits = Signed ? (32 - WidthVal + 1) : (32 - WidthVal);
2467 unsigned OpSignBits = DAG.ComputeNumSignBits(BitsFrom);
2468 if (OpSignBits >= SignBits)
2471 EVT SmallVT = EVT::getIntegerVT(*DAG.getContext(), WidthVal);
2473 // This is a sign_extend_inreg. Replace it to take advantage of existing
2474 // DAG Combines. If not eliminated, we will match back to BFE during
2477 // TODO: The sext_inreg of extended types ends, although we can could
2478 // handle them in a single BFE.
2479 return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, MVT::i32, BitsFrom,
2480 DAG.getValueType(SmallVT));
2483 return DAG.getZeroExtendInReg(BitsFrom, DL, SmallVT);
2486 if (ConstantSDNode *CVal = dyn_cast<ConstantSDNode>(BitsFrom)) {
2488 return constantFoldBFE<int32_t>(DAG,
2489 CVal->getSExtValue(),
2494 return constantFoldBFE<uint32_t>(DAG,
2495 CVal->getZExtValue(),
2500 if ((OffsetVal + WidthVal) >= 32) {
2501 SDValue ShiftVal = DAG.getConstant(OffsetVal, MVT::i32);
2502 return DAG.getNode(Signed ? ISD::SRA : ISD::SRL, DL, MVT::i32,
2503 BitsFrom, ShiftVal);
2506 if (BitsFrom.hasOneUse()) {
2507 APInt Demanded = APInt::getBitsSet(32,
2509 OffsetVal + WidthVal);
2511 APInt KnownZero, KnownOne;
2512 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
2513 !DCI.isBeforeLegalizeOps());
2514 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
2515 if (TLO.ShrinkDemandedConstant(BitsFrom, Demanded) ||
2516 TLI.SimplifyDemandedBits(BitsFrom, Demanded,
2517 KnownZero, KnownOne, TLO)) {
2518 DCI.CommitTargetLoweringOpt(TLO);
2526 return performStoreCombine(N, DCI);
2531 //===----------------------------------------------------------------------===//
2533 //===----------------------------------------------------------------------===//
2535 void AMDGPUTargetLowering::getOriginalFunctionArgs(
2538 const SmallVectorImpl<ISD::InputArg> &Ins,
2539 SmallVectorImpl<ISD::InputArg> &OrigIns) const {
2541 for (unsigned i = 0, e = Ins.size(); i < e; ++i) {
2542 if (Ins[i].ArgVT == Ins[i].VT) {
2543 OrigIns.push_back(Ins[i]);
2548 if (Ins[i].ArgVT.isVector() && !Ins[i].VT.isVector()) {
2549 // Vector has been split into scalars.
2550 VT = Ins[i].ArgVT.getVectorElementType();
2551 } else if (Ins[i].VT.isVector() && Ins[i].ArgVT.isVector() &&
2552 Ins[i].ArgVT.getVectorElementType() !=
2553 Ins[i].VT.getVectorElementType()) {
2554 // Vector elements have been promoted
2557 // Vector has been spilt into smaller vectors.
2561 ISD::InputArg Arg(Ins[i].Flags, VT, VT, Ins[i].Used,
2562 Ins[i].OrigArgIndex, Ins[i].PartOffset);
2563 OrigIns.push_back(Arg);
2567 bool AMDGPUTargetLowering::isHWTrueValue(SDValue Op) const {
2568 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
2569 return CFP->isExactlyValue(1.0);
2571 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
2572 return C->isAllOnesValue();
2577 bool AMDGPUTargetLowering::isHWFalseValue(SDValue Op) const {
2578 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
2579 return CFP->getValueAPF().isZero();
2581 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
2582 return C->isNullValue();
2587 SDValue AMDGPUTargetLowering::CreateLiveInRegister(SelectionDAG &DAG,
2588 const TargetRegisterClass *RC,
2589 unsigned Reg, EVT VT) const {
2590 MachineFunction &MF = DAG.getMachineFunction();
2591 MachineRegisterInfo &MRI = MF.getRegInfo();
2592 unsigned VirtualRegister;
2593 if (!MRI.isLiveIn(Reg)) {
2594 VirtualRegister = MRI.createVirtualRegister(RC);
2595 MRI.addLiveIn(Reg, VirtualRegister);
2597 VirtualRegister = MRI.getLiveInVirtReg(Reg);
2599 return DAG.getRegister(VirtualRegister, VT);
2602 #define NODE_NAME_CASE(node) case AMDGPUISD::node: return #node;
2604 const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const {
2606 default: return nullptr;
2608 NODE_NAME_CASE(CALL);
2609 NODE_NAME_CASE(UMUL);
2610 NODE_NAME_CASE(RET_FLAG);
2611 NODE_NAME_CASE(BRANCH_COND);
2614 NODE_NAME_CASE(DWORDADDR)
2615 NODE_NAME_CASE(FRACT)
2616 NODE_NAME_CASE(CLAMP)
2617 NODE_NAME_CASE(FMAX_LEGACY)
2618 NODE_NAME_CASE(SMAX)
2619 NODE_NAME_CASE(UMAX)
2620 NODE_NAME_CASE(FMIN_LEGACY)
2621 NODE_NAME_CASE(SMIN)
2622 NODE_NAME_CASE(UMIN)
2623 NODE_NAME_CASE(FMAX3)
2624 NODE_NAME_CASE(SMAX3)
2625 NODE_NAME_CASE(UMAX3)
2626 NODE_NAME_CASE(FMIN3)
2627 NODE_NAME_CASE(SMIN3)
2628 NODE_NAME_CASE(UMIN3)
2629 NODE_NAME_CASE(URECIP)
2630 NODE_NAME_CASE(DIV_SCALE)
2631 NODE_NAME_CASE(DIV_FMAS)
2632 NODE_NAME_CASE(DIV_FIXUP)
2633 NODE_NAME_CASE(TRIG_PREOP)
2636 NODE_NAME_CASE(RSQ_LEGACY)
2637 NODE_NAME_CASE(RSQ_CLAMPED)
2638 NODE_NAME_CASE(LDEXP)
2639 NODE_NAME_CASE(FP_CLASS)
2640 NODE_NAME_CASE(DOT4)
2641 NODE_NAME_CASE(BFE_U32)
2642 NODE_NAME_CASE(BFE_I32)
2645 NODE_NAME_CASE(BREV)
2646 NODE_NAME_CASE(MUL_U24)
2647 NODE_NAME_CASE(MUL_I24)
2648 NODE_NAME_CASE(MAD_U24)
2649 NODE_NAME_CASE(MAD_I24)
2650 NODE_NAME_CASE(EXPORT)
2651 NODE_NAME_CASE(CONST_ADDRESS)
2652 NODE_NAME_CASE(REGISTER_LOAD)
2653 NODE_NAME_CASE(REGISTER_STORE)
2654 NODE_NAME_CASE(LOAD_CONSTANT)
2655 NODE_NAME_CASE(LOAD_INPUT)
2656 NODE_NAME_CASE(SAMPLE)
2657 NODE_NAME_CASE(SAMPLEB)
2658 NODE_NAME_CASE(SAMPLED)
2659 NODE_NAME_CASE(SAMPLEL)
2660 NODE_NAME_CASE(CVT_F32_UBYTE0)
2661 NODE_NAME_CASE(CVT_F32_UBYTE1)
2662 NODE_NAME_CASE(CVT_F32_UBYTE2)
2663 NODE_NAME_CASE(CVT_F32_UBYTE3)
2664 NODE_NAME_CASE(BUILD_VERTICAL_VECTOR)
2665 NODE_NAME_CASE(CONST_DATA_PTR)
2666 NODE_NAME_CASE(STORE_MSKOR)
2667 NODE_NAME_CASE(TBUFFER_STORE_FORMAT)
2671 SDValue AMDGPUTargetLowering::getRsqrtEstimate(SDValue Operand,
2672 DAGCombinerInfo &DCI,
2673 unsigned &RefinementSteps,
2674 bool &UseOneConstNR) const {
2675 SelectionDAG &DAG = DCI.DAG;
2676 EVT VT = Operand.getValueType();
2678 if (VT == MVT::f32) {
2679 RefinementSteps = 0;
2680 return DAG.getNode(AMDGPUISD::RSQ, SDLoc(Operand), VT, Operand);
2683 // TODO: There is also f64 rsq instruction, but the documentation is less
2684 // clear on its precision.
2689 SDValue AMDGPUTargetLowering::getRecipEstimate(SDValue Operand,
2690 DAGCombinerInfo &DCI,
2691 unsigned &RefinementSteps) const {
2692 SelectionDAG &DAG = DCI.DAG;
2693 EVT VT = Operand.getValueType();
2695 if (VT == MVT::f32) {
2696 // Reciprocal, < 1 ulp error.
2698 // This reciprocal approximation converges to < 0.5 ulp error with one
2699 // newton rhapson performed with two fused multiple adds (FMAs).
2701 RefinementSteps = 0;
2702 return DAG.getNode(AMDGPUISD::RCP, SDLoc(Operand), VT, Operand);
2705 // TODO: There is also f64 rcp instruction, but the documentation is less
2706 // clear on its precision.
2711 static void computeKnownBitsForMinMax(const SDValue Op0,
2715 const SelectionDAG &DAG,
2717 APInt Op0Zero, Op0One;
2718 APInt Op1Zero, Op1One;
2719 DAG.computeKnownBits(Op0, Op0Zero, Op0One, Depth);
2720 DAG.computeKnownBits(Op1, Op1Zero, Op1One, Depth);
2722 KnownZero = Op0Zero & Op1Zero;
2723 KnownOne = Op0One & Op1One;
2726 void AMDGPUTargetLowering::computeKnownBitsForTargetNode(
2730 const SelectionDAG &DAG,
2731 unsigned Depth) const {
2733 KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0); // Don't know anything.
2737 unsigned Opc = Op.getOpcode();
2742 case ISD::INTRINSIC_WO_CHAIN: {
2743 // FIXME: The intrinsic should just use the node.
2744 switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
2745 case AMDGPUIntrinsic::AMDGPU_imax:
2746 case AMDGPUIntrinsic::AMDGPU_umax:
2747 case AMDGPUIntrinsic::AMDGPU_imin:
2748 case AMDGPUIntrinsic::AMDGPU_umin:
2749 computeKnownBitsForMinMax(Op.getOperand(1), Op.getOperand(2),
2750 KnownZero, KnownOne, DAG, Depth);
2758 case AMDGPUISD::SMAX:
2759 case AMDGPUISD::UMAX:
2760 case AMDGPUISD::SMIN:
2761 case AMDGPUISD::UMIN:
2762 computeKnownBitsForMinMax(Op.getOperand(0), Op.getOperand(1),
2763 KnownZero, KnownOne, DAG, Depth);
2766 case AMDGPUISD::CARRY:
2767 case AMDGPUISD::BORROW: {
2768 KnownZero = APInt::getHighBitsSet(32, 31);
2772 case AMDGPUISD::BFE_I32:
2773 case AMDGPUISD::BFE_U32: {
2774 ConstantSDNode *CWidth = dyn_cast<ConstantSDNode>(Op.getOperand(2));
2778 unsigned BitWidth = 32;
2779 uint32_t Width = CWidth->getZExtValue() & 0x1f;
2781 if (Opc == AMDGPUISD::BFE_U32)
2782 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - Width);
2789 unsigned AMDGPUTargetLowering::ComputeNumSignBitsForTargetNode(
2791 const SelectionDAG &DAG,
2792 unsigned Depth) const {
2793 switch (Op.getOpcode()) {
2794 case AMDGPUISD::BFE_I32: {
2795 ConstantSDNode *Width = dyn_cast<ConstantSDNode>(Op.getOperand(2));
2799 unsigned SignBits = 32 - Width->getZExtValue() + 1;
2800 ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(Op.getOperand(1));
2801 if (!Offset || !Offset->isNullValue())
2804 // TODO: Could probably figure something out with non-0 offsets.
2805 unsigned Op0SignBits = DAG.ComputeNumSignBits(Op.getOperand(0), Depth + 1);
2806 return std::max(SignBits, Op0SignBits);
2809 case AMDGPUISD::BFE_U32: {
2810 ConstantSDNode *Width = dyn_cast<ConstantSDNode>(Op.getOperand(2));
2811 return Width ? 32 - (Width->getZExtValue() & 0x1f) : 1;
2814 case AMDGPUISD::CARRY:
2815 case AMDGPUISD::BORROW: