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 "AMDGPURegisterInfo.h"
20 #include "AMDGPUSubtarget.h"
21 #include "AMDILIntrinsicInfo.h"
22 #include "R600MachineFunctionInfo.h"
23 #include "SIMachineFunctionInfo.h"
24 #include "llvm/Analysis/ValueTracking.h"
25 #include "llvm/CodeGen/CallingConvLower.h"
26 #include "llvm/CodeGen/MachineFunction.h"
27 #include "llvm/CodeGen/MachineRegisterInfo.h"
28 #include "llvm/CodeGen/SelectionDAG.h"
29 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
30 #include "llvm/IR/DataLayout.h"
33 static bool allocateStack(unsigned ValNo, MVT ValVT, MVT LocVT,
34 CCValAssign::LocInfo LocInfo,
35 ISD::ArgFlagsTy ArgFlags, CCState &State) {
36 unsigned Offset = State.AllocateStack(ValVT.getStoreSize(),
37 ArgFlags.getOrigAlign());
38 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
43 #include "AMDGPUGenCallingConv.inc"
45 AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
46 TargetLowering(TM, new TargetLoweringObjectFileELF()) {
48 Subtarget = &TM.getSubtarget<AMDGPUSubtarget>();
50 // Initialize target lowering borrowed from AMDIL
53 // We need to custom lower some of the intrinsics
54 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
56 // Library functions. These default to Expand, but we have instructions
58 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
59 setOperationAction(ISD::FEXP2, MVT::f32, Legal);
60 setOperationAction(ISD::FPOW, MVT::f32, Legal);
61 setOperationAction(ISD::FLOG2, MVT::f32, Legal);
62 setOperationAction(ISD::FABS, MVT::f32, Legal);
63 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
64 setOperationAction(ISD::FRINT, MVT::f32, Legal);
65 setOperationAction(ISD::FROUND, MVT::f32, Legal);
66 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
68 // The hardware supports ROTR, but not ROTL
69 setOperationAction(ISD::ROTL, MVT::i32, Expand);
71 // Lower floating point store/load to integer store/load to reduce the number
72 // of patterns in tablegen.
73 setOperationAction(ISD::STORE, MVT::f32, Promote);
74 AddPromotedToType(ISD::STORE, MVT::f32, MVT::i32);
76 setOperationAction(ISD::STORE, MVT::v2f32, Promote);
77 AddPromotedToType(ISD::STORE, MVT::v2f32, MVT::v2i32);
79 setOperationAction(ISD::STORE, MVT::v4f32, Promote);
80 AddPromotedToType(ISD::STORE, MVT::v4f32, MVT::v4i32);
82 setOperationAction(ISD::STORE, MVT::v8f32, Promote);
83 AddPromotedToType(ISD::STORE, MVT::v8f32, MVT::v8i32);
85 setOperationAction(ISD::STORE, MVT::v16f32, Promote);
86 AddPromotedToType(ISD::STORE, MVT::v16f32, MVT::v16i32);
88 setOperationAction(ISD::STORE, MVT::f64, Promote);
89 AddPromotedToType(ISD::STORE, MVT::f64, MVT::i64);
91 // Custom lowering of vector stores is required for local address space
93 setOperationAction(ISD::STORE, MVT::v4i32, Custom);
94 // XXX: Native v2i32 local address space stores are possible, but not
95 // currently implemented.
96 setOperationAction(ISD::STORE, MVT::v2i32, Custom);
98 setTruncStoreAction(MVT::v2i32, MVT::v2i16, Custom);
99 setTruncStoreAction(MVT::v2i32, MVT::v2i8, Custom);
100 setTruncStoreAction(MVT::v4i32, MVT::v4i8, Custom);
102 // XXX: This can be change to Custom, once ExpandVectorStores can
103 // handle 64-bit stores.
104 setTruncStoreAction(MVT::v4i32, MVT::v4i16, Expand);
106 setTruncStoreAction(MVT::i64, MVT::i1, Expand);
107 setTruncStoreAction(MVT::v2i64, MVT::v2i1, Expand);
108 setTruncStoreAction(MVT::v4i64, MVT::v4i1, Expand);
111 setOperationAction(ISD::LOAD, MVT::f32, Promote);
112 AddPromotedToType(ISD::LOAD, MVT::f32, MVT::i32);
114 setOperationAction(ISD::LOAD, MVT::v2f32, Promote);
115 AddPromotedToType(ISD::LOAD, MVT::v2f32, MVT::v2i32);
117 setOperationAction(ISD::LOAD, MVT::v4f32, Promote);
118 AddPromotedToType(ISD::LOAD, MVT::v4f32, MVT::v4i32);
120 setOperationAction(ISD::LOAD, MVT::v8f32, Promote);
121 AddPromotedToType(ISD::LOAD, MVT::v8f32, MVT::v8i32);
123 setOperationAction(ISD::LOAD, MVT::v16f32, Promote);
124 AddPromotedToType(ISD::LOAD, MVT::v16f32, MVT::v16i32);
126 setOperationAction(ISD::LOAD, MVT::f64, Promote);
127 AddPromotedToType(ISD::LOAD, MVT::f64, MVT::i64);
129 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
130 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Custom);
131 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
132 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
133 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f32, Custom);
134 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i32, Custom);
135 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4f32, Custom);
136 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4i32, Custom);
137 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f32, Custom);
138 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8i32, Custom);
140 setLoadExtAction(ISD::EXTLOAD, MVT::v2i8, Expand);
141 setLoadExtAction(ISD::SEXTLOAD, MVT::v2i8, Expand);
142 setLoadExtAction(ISD::ZEXTLOAD, MVT::v2i8, Expand);
143 setLoadExtAction(ISD::EXTLOAD, MVT::v4i8, Expand);
144 setLoadExtAction(ISD::SEXTLOAD, MVT::v4i8, Expand);
145 setLoadExtAction(ISD::ZEXTLOAD, MVT::v4i8, Expand);
146 setLoadExtAction(ISD::EXTLOAD, MVT::v2i16, Expand);
147 setLoadExtAction(ISD::SEXTLOAD, MVT::v2i16, Expand);
148 setLoadExtAction(ISD::ZEXTLOAD, MVT::v2i16, Expand);
149 setLoadExtAction(ISD::EXTLOAD, MVT::v4i16, Expand);
150 setLoadExtAction(ISD::SEXTLOAD, MVT::v4i16, Expand);
151 setLoadExtAction(ISD::ZEXTLOAD, MVT::v4i16, Expand);
153 setOperationAction(ISD::BR_CC, MVT::i1, Expand);
155 setOperationAction(ISD::FNEG, MVT::v2f32, Expand);
156 setOperationAction(ISD::FNEG, MVT::v4f32, Expand);
158 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
160 setOperationAction(ISD::MUL, MVT::i64, Expand);
162 setOperationAction(ISD::UDIV, MVT::i32, Expand);
163 setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
164 setOperationAction(ISD::UREM, MVT::i32, Expand);
165 setOperationAction(ISD::VSELECT, MVT::v2f32, Expand);
166 setOperationAction(ISD::VSELECT, MVT::v4f32, Expand);
168 static const MVT::SimpleValueType IntTypes[] = {
169 MVT::v2i32, MVT::v4i32
171 const size_t NumIntTypes = array_lengthof(IntTypes);
173 for (unsigned int x = 0; x < NumIntTypes; ++x) {
174 MVT::SimpleValueType VT = IntTypes[x];
175 //Expand the following operations for the current type by default
176 setOperationAction(ISD::ADD, VT, Expand);
177 setOperationAction(ISD::AND, VT, Expand);
178 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
179 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
180 setOperationAction(ISD::MUL, VT, Expand);
181 setOperationAction(ISD::OR, VT, Expand);
182 setOperationAction(ISD::SHL, VT, Expand);
183 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
184 setOperationAction(ISD::SRL, VT, Expand);
185 setOperationAction(ISD::SRA, VT, Expand);
186 setOperationAction(ISD::SUB, VT, Expand);
187 setOperationAction(ISD::UDIV, VT, Expand);
188 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
189 setOperationAction(ISD::UREM, VT, Expand);
190 setOperationAction(ISD::SELECT, VT, Expand);
191 setOperationAction(ISD::VSELECT, VT, Expand);
192 setOperationAction(ISD::XOR, VT, Expand);
195 static const MVT::SimpleValueType FloatTypes[] = {
196 MVT::v2f32, MVT::v4f32
198 const size_t NumFloatTypes = array_lengthof(FloatTypes);
200 for (unsigned int x = 0; x < NumFloatTypes; ++x) {
201 MVT::SimpleValueType VT = FloatTypes[x];
202 setOperationAction(ISD::FABS, VT, Expand);
203 setOperationAction(ISD::FADD, VT, Expand);
204 setOperationAction(ISD::FDIV, VT, Expand);
205 setOperationAction(ISD::FPOW, VT, Expand);
206 setOperationAction(ISD::FFLOOR, VT, Expand);
207 setOperationAction(ISD::FTRUNC, VT, Expand);
208 setOperationAction(ISD::FMUL, VT, Expand);
209 setOperationAction(ISD::FRINT, VT, Expand);
210 setOperationAction(ISD::FSQRT, VT, Expand);
211 setOperationAction(ISD::FSUB, VT, Expand);
212 setOperationAction(ISD::SELECT, VT, Expand);
215 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Custom);
216 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i1, Custom);
217 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i1, Custom);
219 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Custom);
220 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i8, Custom);
221 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i8, Custom);
223 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Custom);
224 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i16, Custom);
225 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i16, Custom);
227 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Custom);
229 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::Other, Custom);
231 setTargetDAGCombine(ISD::MUL);
234 //===----------------------------------------------------------------------===//
235 // Target Information
236 //===----------------------------------------------------------------------===//
238 MVT AMDGPUTargetLowering::getVectorIdxTy() const {
242 bool AMDGPUTargetLowering::isLoadBitCastBeneficial(EVT LoadTy,
244 if (LoadTy.getSizeInBits() != CastTy.getSizeInBits())
247 unsigned LScalarSize = LoadTy.getScalarType().getSizeInBits();
248 unsigned CastScalarSize = CastTy.getScalarType().getSizeInBits();
250 return ((LScalarSize <= CastScalarSize) ||
251 (CastScalarSize >= 32) ||
255 //===---------------------------------------------------------------------===//
257 //===---------------------------------------------------------------------===//
259 bool AMDGPUTargetLowering::isFAbsFree(EVT VT) const {
260 assert(VT.isFloatingPoint());
261 return VT == MVT::f32;
264 bool AMDGPUTargetLowering::isFNegFree(EVT VT) const {
265 assert(VT.isFloatingPoint());
266 return VT == MVT::f32;
269 bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const {
270 // Truncate is just accessing a subregister.
271 return Dest.bitsLT(Source) && (Dest.getSizeInBits() % 32 == 0);
274 bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const {
275 // Truncate is just accessing a subregister.
276 return Dest->getPrimitiveSizeInBits() < Source->getPrimitiveSizeInBits() &&
277 (Dest->getPrimitiveSizeInBits() % 32 == 0);
280 bool AMDGPUTargetLowering::isZExtFree(Type *Src, Type *Dest) const {
281 const DataLayout *DL = getDataLayout();
282 unsigned SrcSize = DL->getTypeSizeInBits(Src->getScalarType());
283 unsigned DestSize = DL->getTypeSizeInBits(Dest->getScalarType());
285 return SrcSize == 32 && DestSize == 64;
288 bool AMDGPUTargetLowering::isZExtFree(EVT Src, EVT Dest) const {
289 // Any register load of a 64-bit value really requires 2 32-bit moves. For all
290 // practical purposes, the extra mov 0 to load a 64-bit is free. As used,
291 // this will enable reducing 64-bit operations the 32-bit, which is always
293 return Src == MVT::i32 && Dest == MVT::i64;
296 bool AMDGPUTargetLowering::isNarrowingProfitable(EVT SrcVT, EVT DestVT) const {
297 // There aren't really 64-bit registers, but pairs of 32-bit ones and only a
298 // limited number of native 64-bit operations. Shrinking an operation to fit
299 // in a single 32-bit register should always be helpful. As currently used,
300 // this is much less general than the name suggests, and is only used in
301 // places trying to reduce the sizes of loads. Shrinking loads to < 32-bits is
302 // not profitable, and may actually be harmful.
303 return SrcVT.getSizeInBits() > 32 && DestVT.getSizeInBits() == 32;
306 //===---------------------------------------------------------------------===//
307 // TargetLowering Callbacks
308 //===---------------------------------------------------------------------===//
310 void AMDGPUTargetLowering::AnalyzeFormalArguments(CCState &State,
311 const SmallVectorImpl<ISD::InputArg> &Ins) const {
313 State.AnalyzeFormalArguments(Ins, CC_AMDGPU);
316 SDValue AMDGPUTargetLowering::LowerReturn(
318 CallingConv::ID CallConv,
320 const SmallVectorImpl<ISD::OutputArg> &Outs,
321 const SmallVectorImpl<SDValue> &OutVals,
322 SDLoc DL, SelectionDAG &DAG) const {
323 return DAG.getNode(AMDGPUISD::RET_FLAG, DL, MVT::Other, Chain);
326 //===---------------------------------------------------------------------===//
327 // Target specific lowering
328 //===---------------------------------------------------------------------===//
330 SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG)
332 switch (Op.getOpcode()) {
334 Op.getNode()->dump();
335 llvm_unreachable("Custom lowering code for this"
336 "instruction is not implemented yet!");
338 // AMDIL DAG lowering
339 case ISD::SDIV: return LowerSDIV(Op, DAG);
340 case ISD::SREM: return LowerSREM(Op, DAG);
341 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG);
342 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
343 // AMDGPU DAG lowering
344 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
345 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
346 case ISD::FrameIndex: return LowerFrameIndex(Op, DAG);
347 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
348 case ISD::UDIVREM: return LowerUDIVREM(Op, DAG);
349 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
354 void AMDGPUTargetLowering::ReplaceNodeResults(SDNode *N,
355 SmallVectorImpl<SDValue> &Results,
356 SelectionDAG &DAG) const {
357 switch (N->getOpcode()) {
358 case ISD::SIGN_EXTEND_INREG:
359 // Different parts of legalization seem to interpret which type of
360 // sign_extend_inreg is the one to check for custom lowering. The extended
361 // from type is what really matters, but some places check for custom
362 // lowering of the result type. This results in trying to use
363 // ReplaceNodeResults to sext_in_reg to an illegal type, so we'll just do
364 // nothing here and let the illegal result integer be handled normally.
372 SDValue AMDGPUTargetLowering::LowerConstantInitializer(const Constant* Init,
373 const GlobalValue *GV,
374 const SDValue &InitPtr,
376 SelectionDAG &DAG) const {
377 const DataLayout *TD = getTargetMachine().getDataLayout();
379 if (const ConstantInt *CI = dyn_cast<ConstantInt>(Init)) {
380 EVT VT = EVT::getEVT(CI->getType());
381 PointerType *PtrTy = PointerType::get(CI->getType(), 0);
382 return DAG.getStore(Chain, DL, DAG.getConstant(*CI, VT), InitPtr,
383 MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
384 TD->getPrefTypeAlignment(CI->getType()));
385 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(Init)) {
386 EVT VT = EVT::getEVT(CFP->getType());
387 PointerType *PtrTy = PointerType::get(CFP->getType(), 0);
388 return DAG.getStore(Chain, DL, DAG.getConstantFP(*CFP, VT), InitPtr,
389 MachinePointerInfo(UndefValue::get(PtrTy)), false, false,
390 TD->getPrefTypeAlignment(CFP->getType()));
391 } else if (Init->getType()->isAggregateType()) {
392 EVT PtrVT = InitPtr.getValueType();
393 unsigned NumElements = Init->getType()->getArrayNumElements();
394 SmallVector<SDValue, 8> Chains;
395 for (unsigned i = 0; i < NumElements; ++i) {
396 SDValue Offset = DAG.getConstant(i * TD->getTypeAllocSize(
397 Init->getType()->getArrayElementType()), PtrVT);
398 SDValue Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, InitPtr, Offset);
399 Chains.push_back(LowerConstantInitializer(Init->getAggregateElement(i),
400 GV, Ptr, Chain, DAG));
402 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
403 Chains.data(), Chains.size());
406 llvm_unreachable("Unhandled constant initializer");
410 SDValue AMDGPUTargetLowering::LowerGlobalAddress(AMDGPUMachineFunction* MFI,
412 SelectionDAG &DAG) const {
414 const DataLayout *TD = getTargetMachine().getDataLayout();
415 GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Op);
416 const GlobalValue *GV = G->getGlobal();
418 switch (G->getAddressSpace()) {
419 default: llvm_unreachable("Global Address lowering not implemented for this "
421 case AMDGPUAS::LOCAL_ADDRESS: {
422 // XXX: What does the value of G->getOffset() mean?
423 assert(G->getOffset() == 0 &&
424 "Do not know what to do with an non-zero offset");
427 if (MFI->LocalMemoryObjects.count(GV) == 0) {
428 uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType());
429 Offset = MFI->LDSSize;
430 MFI->LocalMemoryObjects[GV] = Offset;
431 // XXX: Account for alignment?
432 MFI->LDSSize += Size;
434 Offset = MFI->LocalMemoryObjects[GV];
437 return DAG.getConstant(Offset, getPointerTy(G->getAddressSpace()));
439 case AMDGPUAS::CONSTANT_ADDRESS: {
440 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
441 Type *EltType = GV->getType()->getElementType();
442 unsigned Size = TD->getTypeAllocSize(EltType);
443 unsigned Alignment = TD->getPrefTypeAlignment(EltType);
445 const GlobalVariable *Var = dyn_cast<GlobalVariable>(GV);
446 const Constant *Init = Var->getInitializer();
447 int FI = FrameInfo->CreateStackObject(Size, Alignment, false);
448 SDValue InitPtr = DAG.getFrameIndex(FI,
449 getPointerTy(AMDGPUAS::PRIVATE_ADDRESS));
450 SmallVector<SDNode*, 8> WorkList;
452 for (SDNode::use_iterator I = DAG.getEntryNode()->use_begin(),
453 E = DAG.getEntryNode()->use_end(); I != E; ++I) {
454 if (I->getOpcode() != AMDGPUISD::REGISTER_LOAD && I->getOpcode() != ISD::LOAD)
456 WorkList.push_back(*I);
458 SDValue Chain = LowerConstantInitializer(Init, GV, InitPtr, DAG.getEntryNode(), DAG);
459 for (SmallVector<SDNode*, 8>::iterator I = WorkList.begin(),
460 E = WorkList.end(); I != E; ++I) {
461 SmallVector<SDValue, 8> Ops;
462 Ops.push_back(Chain);
463 for (unsigned i = 1; i < (*I)->getNumOperands(); ++i) {
464 Ops.push_back((*I)->getOperand(i));
466 DAG.UpdateNodeOperands(*I, Ops.data(), Ops.size());
468 return DAG.getZExtOrTrunc(InitPtr, SDLoc(Op),
469 getPointerTy(AMDGPUAS::CONSTANT_ADDRESS));
474 SDValue AMDGPUTargetLowering::LowerCONCAT_VECTORS(SDValue Op,
475 SelectionDAG &DAG) const {
476 SmallVector<SDValue, 8> Args;
477 SDValue A = Op.getOperand(0);
478 SDValue B = Op.getOperand(1);
480 DAG.ExtractVectorElements(A, Args);
481 DAG.ExtractVectorElements(B, Args);
483 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(),
484 Args.data(), Args.size());
487 SDValue AMDGPUTargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op,
488 SelectionDAG &DAG) const {
490 SmallVector<SDValue, 8> Args;
491 unsigned Start = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
492 EVT VT = Op.getValueType();
493 DAG.ExtractVectorElements(Op.getOperand(0), Args, Start,
494 VT.getVectorNumElements());
496 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(),
497 Args.data(), Args.size());
500 SDValue AMDGPUTargetLowering::LowerFrameIndex(SDValue Op,
501 SelectionDAG &DAG) const {
503 MachineFunction &MF = DAG.getMachineFunction();
504 const AMDGPUFrameLowering *TFL =
505 static_cast<const AMDGPUFrameLowering*>(getTargetMachine().getFrameLowering());
507 FrameIndexSDNode *FIN = dyn_cast<FrameIndexSDNode>(Op);
510 unsigned FrameIndex = FIN->getIndex();
511 unsigned Offset = TFL->getFrameIndexOffset(MF, FrameIndex);
512 return DAG.getConstant(Offset * 4 * TFL->getStackWidth(MF),
516 SDValue AMDGPUTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
517 SelectionDAG &DAG) const {
518 unsigned IntrinsicID = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
520 EVT VT = Op.getValueType();
522 switch (IntrinsicID) {
524 case AMDGPUIntrinsic::AMDIL_abs:
525 return LowerIntrinsicIABS(Op, DAG);
526 case AMDGPUIntrinsic::AMDIL_exp:
527 return DAG.getNode(ISD::FEXP2, DL, VT, Op.getOperand(1));
528 case AMDGPUIntrinsic::AMDGPU_lrp:
529 return LowerIntrinsicLRP(Op, DAG);
530 case AMDGPUIntrinsic::AMDIL_fraction:
531 return DAG.getNode(AMDGPUISD::FRACT, DL, VT, Op.getOperand(1));
532 case AMDGPUIntrinsic::AMDIL_max:
533 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, Op.getOperand(1),
535 case AMDGPUIntrinsic::AMDGPU_imax:
536 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Op.getOperand(1),
538 case AMDGPUIntrinsic::AMDGPU_umax:
539 return DAG.getNode(AMDGPUISD::UMAX, DL, VT, Op.getOperand(1),
541 case AMDGPUIntrinsic::AMDIL_min:
542 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, Op.getOperand(1),
544 case AMDGPUIntrinsic::AMDGPU_imin:
545 return DAG.getNode(AMDGPUISD::SMIN, DL, VT, Op.getOperand(1),
547 case AMDGPUIntrinsic::AMDGPU_umin:
548 return DAG.getNode(AMDGPUISD::UMIN, DL, VT, Op.getOperand(1),
551 case AMDGPUIntrinsic::AMDGPU_bfe_i32:
552 return DAG.getNode(AMDGPUISD::BFE_I32, DL, VT,
557 case AMDGPUIntrinsic::AMDGPU_bfe_u32:
558 return DAG.getNode(AMDGPUISD::BFE_U32, DL, VT,
563 case AMDGPUIntrinsic::AMDGPU_bfi:
564 return DAG.getNode(AMDGPUISD::BFI, DL, VT,
569 case AMDGPUIntrinsic::AMDGPU_bfm:
570 return DAG.getNode(AMDGPUISD::BFM, DL, VT,
574 case AMDGPUIntrinsic::AMDIL_round_nearest:
575 return DAG.getNode(ISD::FRINT, DL, VT, Op.getOperand(1));
579 ///IABS(a) = SMAX(sub(0, a), a)
580 SDValue AMDGPUTargetLowering::LowerIntrinsicIABS(SDValue Op,
581 SelectionDAG &DAG) const {
584 EVT VT = Op.getValueType();
585 SDValue Neg = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
588 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Neg, Op.getOperand(1));
591 /// Linear Interpolation
592 /// LRP(a, b, c) = muladd(a, b, (1 - a) * c)
593 SDValue AMDGPUTargetLowering::LowerIntrinsicLRP(SDValue Op,
594 SelectionDAG &DAG) const {
596 EVT VT = Op.getValueType();
597 SDValue OneSubA = DAG.getNode(ISD::FSUB, DL, VT,
598 DAG.getConstantFP(1.0f, MVT::f32),
600 SDValue OneSubAC = DAG.getNode(ISD::FMUL, DL, VT, OneSubA,
602 return DAG.getNode(ISD::FADD, DL, VT,
603 DAG.getNode(ISD::FMUL, DL, VT, Op.getOperand(1), Op.getOperand(2)),
607 /// \brief Generate Min/Max node
608 SDValue AMDGPUTargetLowering::LowerMinMax(SDValue Op,
609 SelectionDAG &DAG) const {
611 EVT VT = Op.getValueType();
613 SDValue LHS = Op.getOperand(0);
614 SDValue RHS = Op.getOperand(1);
615 SDValue True = Op.getOperand(2);
616 SDValue False = Op.getOperand(3);
617 SDValue CC = Op.getOperand(4);
619 if (VT != MVT::f32 ||
620 !((LHS == True && RHS == False) || (LHS == False && RHS == True))) {
624 ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
638 llvm_unreachable("Operation should already be optimised!");
646 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
648 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
657 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
659 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
661 case ISD::SETCC_INVALID:
662 llvm_unreachable("Invalid setcc condcode!");
667 SDValue AMDGPUTargetLowering::SplitVectorLoad(const SDValue &Op,
668 SelectionDAG &DAG) const {
669 LoadSDNode *Load = dyn_cast<LoadSDNode>(Op);
670 EVT MemEltVT = Load->getMemoryVT().getVectorElementType();
671 EVT EltVT = Op.getValueType().getVectorElementType();
672 EVT PtrVT = Load->getBasePtr().getValueType();
673 unsigned NumElts = Load->getMemoryVT().getVectorNumElements();
674 SmallVector<SDValue, 8> Loads;
677 for (unsigned i = 0, e = NumElts; i != e; ++i) {
678 SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT, Load->getBasePtr(),
679 DAG.getConstant(i * (MemEltVT.getSizeInBits() / 8), PtrVT));
680 Loads.push_back(DAG.getExtLoad(Load->getExtensionType(), SL, EltVT,
681 Load->getChain(), Ptr,
682 MachinePointerInfo(Load->getMemOperand()->getValue()),
683 MemEltVT, Load->isVolatile(), Load->isNonTemporal(),
684 Load->getAlignment()));
686 return DAG.getNode(ISD::BUILD_VECTOR, SL, Op.getValueType(),
687 Loads.data(), Loads.size());
690 SDValue AMDGPUTargetLowering::MergeVectorStore(const SDValue &Op,
691 SelectionDAG &DAG) const {
692 StoreSDNode *Store = dyn_cast<StoreSDNode>(Op);
693 EVT MemVT = Store->getMemoryVT();
694 unsigned MemBits = MemVT.getSizeInBits();
696 // Byte stores are really expensive, so if possible, try to pack 32-bit vector
697 // truncating store into an i32 store.
698 // XXX: We could also handle optimize other vector bitwidths.
699 if (!MemVT.isVector() || MemBits > 32) {
704 const SDValue &Value = Store->getValue();
705 EVT VT = Value.getValueType();
706 const SDValue &Ptr = Store->getBasePtr();
707 EVT MemEltVT = MemVT.getVectorElementType();
708 unsigned MemEltBits = MemEltVT.getSizeInBits();
709 unsigned MemNumElements = MemVT.getVectorNumElements();
710 EVT PackedVT = EVT::getIntegerVT(*DAG.getContext(), MemVT.getSizeInBits());
711 SDValue Mask = DAG.getConstant((1 << MemEltBits) - 1, PackedVT);
714 for (unsigned i = 0; i < MemNumElements; ++i) {
715 EVT ElemVT = VT.getVectorElementType();
716 SDValue Elt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ElemVT, Value,
717 DAG.getConstant(i, MVT::i32));
718 Elt = DAG.getZExtOrTrunc(Elt, DL, PackedVT);
719 Elt = DAG.getNode(ISD::AND, DL, PackedVT, Elt, Mask);
720 SDValue Shift = DAG.getConstant(MemEltBits * i, PackedVT);
721 Elt = DAG.getNode(ISD::SHL, DL, PackedVT, Elt, Shift);
725 PackedValue = DAG.getNode(ISD::OR, DL, PackedVT, PackedValue, Elt);
728 return DAG.getStore(Store->getChain(), DL, PackedValue, Ptr,
729 MachinePointerInfo(Store->getMemOperand()->getValue()),
730 Store->isVolatile(), Store->isNonTemporal(),
731 Store->getAlignment());
734 SDValue AMDGPUTargetLowering::SplitVectorStore(SDValue Op,
735 SelectionDAG &DAG) const {
736 StoreSDNode *Store = cast<StoreSDNode>(Op);
737 EVT MemEltVT = Store->getMemoryVT().getVectorElementType();
738 EVT EltVT = Store->getValue().getValueType().getVectorElementType();
739 EVT PtrVT = Store->getBasePtr().getValueType();
740 unsigned NumElts = Store->getMemoryVT().getVectorNumElements();
743 SmallVector<SDValue, 8> Chains;
745 for (unsigned i = 0, e = NumElts; i != e; ++i) {
746 SDValue Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, EltVT,
747 Store->getValue(), DAG.getConstant(i, MVT::i32));
748 SDValue Ptr = DAG.getNode(ISD::ADD, SL, PtrVT,
750 DAG.getConstant(i * (MemEltVT.getSizeInBits() / 8),
752 Chains.push_back(DAG.getTruncStore(Store->getChain(), SL, Val, Ptr,
753 MachinePointerInfo(Store->getMemOperand()->getValue()),
754 MemEltVT, Store->isVolatile(), Store->isNonTemporal(),
755 Store->getAlignment()));
757 return DAG.getNode(ISD::TokenFactor, SL, MVT::Other, Chains.data(), NumElts);
760 SDValue AMDGPUTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
762 LoadSDNode *Load = cast<LoadSDNode>(Op);
763 ISD::LoadExtType ExtType = Load->getExtensionType();
764 EVT VT = Op.getValueType();
765 EVT MemVT = Load->getMemoryVT();
767 if (ExtType != ISD::NON_EXTLOAD && !VT.isVector() && VT.getSizeInBits() > 32) {
768 // We can do the extload to 32-bits, and then need to separately extend to
771 SDValue ExtLoad32 = DAG.getExtLoad(ExtType, DL, MVT::i32,
775 Load->getMemOperand());
776 return DAG.getNode(ISD::getExtForLoadExtType(ExtType), DL, VT, ExtLoad32);
779 // Lower loads constant address space global variable loads
780 if (Load->getAddressSpace() == AMDGPUAS::CONSTANT_ADDRESS &&
781 isa<GlobalVariable>(GetUnderlyingObject(Load->getPointerInfo().V))) {
783 SDValue Ptr = DAG.getZExtOrTrunc(Load->getBasePtr(), DL,
784 getPointerTy(AMDGPUAS::PRIVATE_ADDRESS));
785 Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, Ptr,
786 DAG.getConstant(2, MVT::i32));
787 return DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, Op.getValueType(),
788 Load->getChain(), Ptr,
789 DAG.getTargetConstant(0, MVT::i32), Op.getOperand(2));
792 if (Load->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS ||
793 ExtType == ISD::NON_EXTLOAD || Load->getMemoryVT().bitsGE(MVT::i32))
797 SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, Load->getBasePtr(),
798 DAG.getConstant(2, MVT::i32));
799 SDValue Ret = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, Op.getValueType(),
800 Load->getChain(), Ptr,
801 DAG.getTargetConstant(0, MVT::i32),
803 SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32,
805 DAG.getConstant(0x3, MVT::i32));
806 SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
807 DAG.getConstant(3, MVT::i32));
809 Ret = DAG.getNode(ISD::SRL, DL, MVT::i32, Ret, ShiftAmt);
811 EVT MemEltVT = MemVT.getScalarType();
812 if (ExtType == ISD::SEXTLOAD) {
813 SDValue MemEltVTNode = DAG.getValueType(MemEltVT);
814 return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, MVT::i32, Ret, MemEltVTNode);
817 return DAG.getZeroExtendInReg(Ret, DL, MemEltVT);
820 SDValue AMDGPUTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
822 SDValue Result = AMDGPUTargetLowering::MergeVectorStore(Op, DAG);
823 if (Result.getNode()) {
827 StoreSDNode *Store = cast<StoreSDNode>(Op);
828 SDValue Chain = Store->getChain();
829 if ((Store->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS ||
830 Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS) &&
831 Store->getValue().getValueType().isVector()) {
832 return SplitVectorStore(Op, DAG);
835 EVT MemVT = Store->getMemoryVT();
836 if (Store->getAddressSpace() == AMDGPUAS::PRIVATE_ADDRESS &&
837 MemVT.bitsLT(MVT::i32)) {
839 if (Store->getMemoryVT() == MVT::i8) {
841 } else if (Store->getMemoryVT() == MVT::i16) {
844 SDValue BasePtr = Store->getBasePtr();
845 SDValue Ptr = DAG.getNode(ISD::SRL, DL, MVT::i32, BasePtr,
846 DAG.getConstant(2, MVT::i32));
847 SDValue Dst = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, MVT::i32,
848 Chain, Ptr, DAG.getTargetConstant(0, MVT::i32));
850 SDValue ByteIdx = DAG.getNode(ISD::AND, DL, MVT::i32, BasePtr,
851 DAG.getConstant(0x3, MVT::i32));
853 SDValue ShiftAmt = DAG.getNode(ISD::SHL, DL, MVT::i32, ByteIdx,
854 DAG.getConstant(3, MVT::i32));
856 SDValue SExtValue = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i32,
859 SDValue MaskedValue = DAG.getZeroExtendInReg(SExtValue, DL, MemVT);
861 SDValue ShiftedValue = DAG.getNode(ISD::SHL, DL, MVT::i32,
862 MaskedValue, ShiftAmt);
864 SDValue DstMask = DAG.getNode(ISD::SHL, DL, MVT::i32, DAG.getConstant(Mask, MVT::i32),
866 DstMask = DAG.getNode(ISD::XOR, DL, MVT::i32, DstMask,
867 DAG.getConstant(0xffffffff, MVT::i32));
868 Dst = DAG.getNode(ISD::AND, DL, MVT::i32, Dst, DstMask);
870 SDValue Value = DAG.getNode(ISD::OR, DL, MVT::i32, Dst, ShiftedValue);
871 return DAG.getNode(AMDGPUISD::REGISTER_STORE, DL, MVT::Other,
872 Chain, Value, Ptr, DAG.getTargetConstant(0, MVT::i32));
877 SDValue AMDGPUTargetLowering::LowerUDIVREM(SDValue Op,
878 SelectionDAG &DAG) const {
880 EVT VT = Op.getValueType();
882 SDValue Num = Op.getOperand(0);
883 SDValue Den = Op.getOperand(1);
885 SmallVector<SDValue, 8> Results;
887 // RCP = URECIP(Den) = 2^32 / Den + e
888 // e is rounding error.
889 SDValue RCP = DAG.getNode(AMDGPUISD::URECIP, DL, VT, Den);
891 // RCP_LO = umulo(RCP, Den) */
892 SDValue RCP_LO = DAG.getNode(ISD::UMULO, DL, VT, RCP, Den);
894 // RCP_HI = mulhu (RCP, Den) */
895 SDValue RCP_HI = DAG.getNode(ISD::MULHU, DL, VT, RCP, Den);
897 // NEG_RCP_LO = -RCP_LO
898 SDValue NEG_RCP_LO = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
901 // ABS_RCP_LO = (RCP_HI == 0 ? NEG_RCP_LO : RCP_LO)
902 SDValue ABS_RCP_LO = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
905 // Calculate the rounding error from the URECIP instruction
906 // E = mulhu(ABS_RCP_LO, RCP)
907 SDValue E = DAG.getNode(ISD::MULHU, DL, VT, ABS_RCP_LO, RCP);
910 SDValue RCP_A_E = DAG.getNode(ISD::ADD, DL, VT, RCP, E);
913 SDValue RCP_S_E = DAG.getNode(ISD::SUB, DL, VT, RCP, E);
915 // Tmp0 = (RCP_HI == 0 ? RCP_A_E : RCP_SUB_E)
916 SDValue Tmp0 = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
919 // Quotient = mulhu(Tmp0, Num)
920 SDValue Quotient = DAG.getNode(ISD::MULHU, DL, VT, Tmp0, Num);
922 // Num_S_Remainder = Quotient * Den
923 SDValue Num_S_Remainder = DAG.getNode(ISD::UMULO, DL, VT, Quotient, Den);
925 // Remainder = Num - Num_S_Remainder
926 SDValue Remainder = DAG.getNode(ISD::SUB, DL, VT, Num, Num_S_Remainder);
928 // Remainder_GE_Den = (Remainder >= Den ? -1 : 0)
929 SDValue Remainder_GE_Den = DAG.getSelectCC(DL, Remainder, Den,
930 DAG.getConstant(-1, VT),
931 DAG.getConstant(0, VT),
933 // Remainder_GE_Zero = (Num >= Num_S_Remainder ? -1 : 0)
934 SDValue Remainder_GE_Zero = DAG.getSelectCC(DL, Num,
936 DAG.getConstant(-1, VT),
937 DAG.getConstant(0, VT),
939 // Tmp1 = Remainder_GE_Den & Remainder_GE_Zero
940 SDValue Tmp1 = DAG.getNode(ISD::AND, DL, VT, Remainder_GE_Den,
943 // Calculate Division result:
945 // Quotient_A_One = Quotient + 1
946 SDValue Quotient_A_One = DAG.getNode(ISD::ADD, DL, VT, Quotient,
947 DAG.getConstant(1, VT));
949 // Quotient_S_One = Quotient - 1
950 SDValue Quotient_S_One = DAG.getNode(ISD::SUB, DL, VT, Quotient,
951 DAG.getConstant(1, VT));
953 // Div = (Tmp1 == 0 ? Quotient : Quotient_A_One)
954 SDValue Div = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
955 Quotient, Quotient_A_One, ISD::SETEQ);
957 // Div = (Remainder_GE_Zero == 0 ? Quotient_S_One : Div)
958 Div = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
959 Quotient_S_One, Div, ISD::SETEQ);
961 // Calculate Rem result:
963 // Remainder_S_Den = Remainder - Den
964 SDValue Remainder_S_Den = DAG.getNode(ISD::SUB, DL, VT, Remainder, Den);
966 // Remainder_A_Den = Remainder + Den
967 SDValue Remainder_A_Den = DAG.getNode(ISD::ADD, DL, VT, Remainder, Den);
969 // Rem = (Tmp1 == 0 ? Remainder : Remainder_S_Den)
970 SDValue Rem = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
971 Remainder, Remainder_S_Den, ISD::SETEQ);
973 // Rem = (Remainder_GE_Zero == 0 ? Remainder_A_Den : Rem)
974 Rem = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
975 Remainder_A_Den, Rem, ISD::SETEQ);
980 return DAG.getMergeValues(Ops, 2, DL);
983 SDValue AMDGPUTargetLowering::LowerUINT_TO_FP(SDValue Op,
984 SelectionDAG &DAG) const {
985 SDValue S0 = Op.getOperand(0);
987 if (Op.getValueType() != MVT::f32 || S0.getValueType() != MVT::i64)
990 // f32 uint_to_fp i64
991 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
992 DAG.getConstant(0, MVT::i32));
993 SDValue FloatLo = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Lo);
994 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, S0,
995 DAG.getConstant(1, MVT::i32));
996 SDValue FloatHi = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, Hi);
997 FloatHi = DAG.getNode(ISD::FMUL, DL, MVT::f32, FloatHi,
998 DAG.getConstantFP(4294967296.0f, MVT::f32)); // 2^32
999 return DAG.getNode(ISD::FADD, DL, MVT::f32, FloatLo, FloatHi);
1003 SDValue AMDGPUTargetLowering::ExpandSIGN_EXTEND_INREG(SDValue Op,
1005 SelectionDAG &DAG) const {
1006 MVT VT = Op.getSimpleValueType();
1008 SDValue Shift = DAG.getConstant(BitsDiff, VT);
1009 // Shift left by 'Shift' bits.
1010 SDValue Shl = DAG.getNode(ISD::SHL, DL, VT, Op.getOperand(0), Shift);
1011 // Signed shift Right by 'Shift' bits.
1012 return DAG.getNode(ISD::SRA, DL, VT, Shl, Shift);
1015 SDValue AMDGPUTargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
1016 SelectionDAG &DAG) const {
1017 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
1018 MVT VT = Op.getSimpleValueType();
1019 MVT ScalarVT = VT.getScalarType();
1021 unsigned SrcBits = ExtraVT.getScalarType().getSizeInBits();
1022 unsigned DestBits = ScalarVT.getSizeInBits();
1023 unsigned BitsDiff = DestBits - SrcBits;
1025 if (!Subtarget->hasBFE())
1026 return ExpandSIGN_EXTEND_INREG(Op, BitsDiff, DAG);
1028 SDValue Src = Op.getOperand(0);
1029 if (VT.isVector()) {
1031 // Need to scalarize this, and revisit each of the scalars later.
1032 // TODO: Don't scalarize on Evergreen?
1033 unsigned NElts = VT.getVectorNumElements();
1034 SmallVector<SDValue, 8> Args;
1035 DAG.ExtractVectorElements(Src, Args);
1037 SDValue VTOp = DAG.getValueType(ExtraVT.getScalarType());
1038 for (unsigned I = 0; I < NElts; ++I)
1039 Args[I] = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, ScalarVT, Args[I], VTOp);
1041 return DAG.getNode(ISD::BUILD_VECTOR, DL, VT, Args.data(), Args.size());
1044 if (SrcBits == 32) {
1047 // If the source is 32-bits, this is really half of a 2-register pair, and
1048 // we need to discard the unused half of the pair.
1049 SDValue TruncSrc = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, Src);
1050 return DAG.getNode(ISD::SIGN_EXTEND, DL, VT, TruncSrc);
1053 unsigned NElts = VT.isVector() ? VT.getVectorNumElements() : 1;
1055 // TODO: Match 64-bit BFE. SI has a 64-bit BFE, but it's scalar only so it
1056 // might not be worth the effort, and will need to expand to shifts when
1057 // fixing SGPR copies.
1058 if (SrcBits < 32 && DestBits <= 32) {
1060 MVT ExtVT = (NElts == 1) ? MVT::i32 : MVT::getVectorVT(MVT::i32, NElts);
1063 Src = DAG.getNode(ISD::ZERO_EXTEND, DL, ExtVT, Src);
1065 // FIXME: This should use TargetConstant, but that hits assertions for
1067 SDValue Ext = DAG.getNode(AMDGPUISD::BFE_I32, DL, ExtVT,
1068 Op.getOperand(0), // Operand
1069 DAG.getConstant(0, ExtVT), // Offset
1070 DAG.getConstant(SrcBits, ExtVT)); // Width
1072 // Truncate to the original type if necessary.
1073 if (ScalarVT == MVT::i32)
1075 return DAG.getNode(ISD::TRUNCATE, DL, VT, Ext);
1078 // For small types, extend to 32-bits first.
1081 MVT ExtVT = (NElts == 1) ? MVT::i32 : MVT::getVectorVT(MVT::i32, NElts);
1083 SDValue TruncSrc = DAG.getNode(ISD::TRUNCATE, DL, ExtVT, Src);
1084 SDValue Ext32 = DAG.getNode(AMDGPUISD::BFE_I32,
1087 TruncSrc, // Operand
1088 DAG.getConstant(0, ExtVT), // Offset
1089 DAG.getConstant(SrcBits, ExtVT)); // Width
1091 return DAG.getNode(ISD::SIGN_EXTEND, DL, VT, Ext32);
1094 // For everything else, use the standard bitshift expansion.
1095 return ExpandSIGN_EXTEND_INREG(Op, BitsDiff, DAG);
1098 //===----------------------------------------------------------------------===//
1099 // Custom DAG optimizations
1100 //===----------------------------------------------------------------------===//
1102 static bool isU24(SDValue Op, SelectionDAG &DAG) {
1103 APInt KnownZero, KnownOne;
1104 EVT VT = Op.getValueType();
1105 DAG.ComputeMaskedBits(Op, KnownZero, KnownOne);
1107 return (VT.getSizeInBits() - KnownZero.countLeadingOnes()) <= 24;
1110 static bool isI24(SDValue Op, SelectionDAG &DAG) {
1111 EVT VT = Op.getValueType();
1113 // In order for this to be a signed 24-bit value, bit 23, must
1115 return VT.getSizeInBits() >= 24 && // Types less than 24-bit should be treated
1116 // as unsigned 24-bit values.
1117 (VT.getSizeInBits() - DAG.ComputeNumSignBits(Op)) < 24;
1120 static void simplifyI24(SDValue Op, TargetLowering::DAGCombinerInfo &DCI) {
1122 SelectionDAG &DAG = DCI.DAG;
1123 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
1124 EVT VT = Op.getValueType();
1126 APInt Demanded = APInt::getLowBitsSet(VT.getSizeInBits(), 24);
1127 APInt KnownZero, KnownOne;
1128 TargetLowering::TargetLoweringOpt TLO(DAG, true, true);
1129 if (TLI.SimplifyDemandedBits(Op, Demanded, KnownZero, KnownOne, TLO))
1130 DCI.CommitTargetLoweringOpt(TLO);
1133 SDValue AMDGPUTargetLowering::PerformDAGCombine(SDNode *N,
1134 DAGCombinerInfo &DCI) const {
1135 SelectionDAG &DAG = DCI.DAG;
1138 switch(N->getOpcode()) {
1141 EVT VT = N->getValueType(0);
1142 SDValue N0 = N->getOperand(0);
1143 SDValue N1 = N->getOperand(1);
1146 // FIXME: Add support for 24-bit multiply with 64-bit output on SI.
1147 if (VT.isVector() || VT.getSizeInBits() > 32)
1150 if (Subtarget->hasMulU24() && isU24(N0, DAG) && isU24(N1, DAG)) {
1151 N0 = DAG.getZExtOrTrunc(N0, DL, MVT::i32);
1152 N1 = DAG.getZExtOrTrunc(N1, DL, MVT::i32);
1153 Mul = DAG.getNode(AMDGPUISD::MUL_U24, DL, MVT::i32, N0, N1);
1154 } else if (Subtarget->hasMulI24() && isI24(N0, DAG) && isI24(N1, DAG)) {
1155 N0 = DAG.getSExtOrTrunc(N0, DL, MVT::i32);
1156 N1 = DAG.getSExtOrTrunc(N1, DL, MVT::i32);
1157 Mul = DAG.getNode(AMDGPUISD::MUL_I24, DL, MVT::i32, N0, N1);
1162 SDValue Reg = DAG.getSExtOrTrunc(Mul, DL, VT);
1166 case AMDGPUISD::MUL_I24:
1167 case AMDGPUISD::MUL_U24: {
1168 SDValue N0 = N->getOperand(0);
1169 SDValue N1 = N->getOperand(1);
1170 simplifyI24(N0, DCI);
1171 simplifyI24(N1, DCI);
1178 //===----------------------------------------------------------------------===//
1180 //===----------------------------------------------------------------------===//
1182 void AMDGPUTargetLowering::getOriginalFunctionArgs(
1185 const SmallVectorImpl<ISD::InputArg> &Ins,
1186 SmallVectorImpl<ISD::InputArg> &OrigIns) const {
1188 for (unsigned i = 0, e = Ins.size(); i < e; ++i) {
1189 if (Ins[i].ArgVT == Ins[i].VT) {
1190 OrigIns.push_back(Ins[i]);
1195 if (Ins[i].ArgVT.isVector() && !Ins[i].VT.isVector()) {
1196 // Vector has been split into scalars.
1197 VT = Ins[i].ArgVT.getVectorElementType();
1198 } else if (Ins[i].VT.isVector() && Ins[i].ArgVT.isVector() &&
1199 Ins[i].ArgVT.getVectorElementType() !=
1200 Ins[i].VT.getVectorElementType()) {
1201 // Vector elements have been promoted
1204 // Vector has been spilt into smaller vectors.
1208 ISD::InputArg Arg(Ins[i].Flags, VT, VT, Ins[i].Used,
1209 Ins[i].OrigArgIndex, Ins[i].PartOffset);
1210 OrigIns.push_back(Arg);
1214 bool AMDGPUTargetLowering::isHWTrueValue(SDValue Op) const {
1215 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
1216 return CFP->isExactlyValue(1.0);
1218 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
1219 return C->isAllOnesValue();
1224 bool AMDGPUTargetLowering::isHWFalseValue(SDValue Op) const {
1225 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
1226 return CFP->getValueAPF().isZero();
1228 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
1229 return C->isNullValue();
1234 SDValue AMDGPUTargetLowering::CreateLiveInRegister(SelectionDAG &DAG,
1235 const TargetRegisterClass *RC,
1236 unsigned Reg, EVT VT) const {
1237 MachineFunction &MF = DAG.getMachineFunction();
1238 MachineRegisterInfo &MRI = MF.getRegInfo();
1239 unsigned VirtualRegister;
1240 if (!MRI.isLiveIn(Reg)) {
1241 VirtualRegister = MRI.createVirtualRegister(RC);
1242 MRI.addLiveIn(Reg, VirtualRegister);
1244 VirtualRegister = MRI.getLiveInVirtReg(Reg);
1246 return DAG.getRegister(VirtualRegister, VT);
1249 #define NODE_NAME_CASE(node) case AMDGPUISD::node: return #node;
1251 const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const {
1255 NODE_NAME_CASE(CALL);
1256 NODE_NAME_CASE(UMUL);
1257 NODE_NAME_CASE(DIV_INF);
1258 NODE_NAME_CASE(RET_FLAG);
1259 NODE_NAME_CASE(BRANCH_COND);
1262 NODE_NAME_CASE(DWORDADDR)
1263 NODE_NAME_CASE(FRACT)
1264 NODE_NAME_CASE(FMAX)
1265 NODE_NAME_CASE(SMAX)
1266 NODE_NAME_CASE(UMAX)
1267 NODE_NAME_CASE(FMIN)
1268 NODE_NAME_CASE(SMIN)
1269 NODE_NAME_CASE(UMIN)
1270 NODE_NAME_CASE(BFE_U32)
1271 NODE_NAME_CASE(BFE_I32)
1274 NODE_NAME_CASE(MUL_U24)
1275 NODE_NAME_CASE(MUL_I24)
1276 NODE_NAME_CASE(URECIP)
1277 NODE_NAME_CASE(DOT4)
1278 NODE_NAME_CASE(EXPORT)
1279 NODE_NAME_CASE(CONST_ADDRESS)
1280 NODE_NAME_CASE(REGISTER_LOAD)
1281 NODE_NAME_CASE(REGISTER_STORE)
1282 NODE_NAME_CASE(LOAD_CONSTANT)
1283 NODE_NAME_CASE(LOAD_INPUT)
1284 NODE_NAME_CASE(SAMPLE)
1285 NODE_NAME_CASE(SAMPLEB)
1286 NODE_NAME_CASE(SAMPLED)
1287 NODE_NAME_CASE(SAMPLEL)
1288 NODE_NAME_CASE(STORE_MSKOR)
1289 NODE_NAME_CASE(TBUFFER_STORE_FORMAT)
1293 static void computeMaskedBitsForMinMax(const SDValue Op0,
1297 const SelectionDAG &DAG,
1299 APInt Op0Zero, Op0One;
1300 APInt Op1Zero, Op1One;
1301 DAG.ComputeMaskedBits(Op0, Op0Zero, Op0One, Depth);
1302 DAG.ComputeMaskedBits(Op1, Op1Zero, Op1One, Depth);
1304 KnownZero = Op0Zero & Op1Zero;
1305 KnownOne = Op0One & Op1One;
1308 void AMDGPUTargetLowering::computeMaskedBitsForTargetNode(
1312 const SelectionDAG &DAG,
1313 unsigned Depth) const {
1315 KnownZero = KnownOne = APInt(KnownOne.getBitWidth(), 0); // Don't know anything.
1316 unsigned Opc = Op.getOpcode();
1318 case ISD::INTRINSIC_WO_CHAIN: {
1319 // FIXME: The intrinsic should just use the node.
1320 switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
1321 case AMDGPUIntrinsic::AMDGPU_imax:
1322 case AMDGPUIntrinsic::AMDGPU_umax:
1323 case AMDGPUIntrinsic::AMDGPU_imin:
1324 case AMDGPUIntrinsic::AMDGPU_umin:
1325 computeMaskedBitsForMinMax(Op.getOperand(1), Op.getOperand(2),
1326 KnownZero, KnownOne, DAG, Depth);
1334 case AMDGPUISD::SMAX:
1335 case AMDGPUISD::UMAX:
1336 case AMDGPUISD::SMIN:
1337 case AMDGPUISD::UMIN:
1338 computeMaskedBitsForMinMax(Op.getOperand(0), Op.getOperand(1),
1339 KnownZero, KnownOne, DAG, Depth);