1 //===-- SIInstrInfo.cpp - SI Instruction Information ---------------------===//
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 SI Implementation of TargetInstrInfo.
13 //===----------------------------------------------------------------------===//
16 #include "SIInstrInfo.h"
17 #include "AMDGPUTargetMachine.h"
18 #include "SIDefines.h"
19 #include "SIMachineFunctionInfo.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/MachineInstrBuilder.h"
22 #include "llvm/CodeGen/MachineRegisterInfo.h"
23 #include "llvm/IR/Function.h"
24 #include "llvm/CodeGen/RegisterScavenging.h"
25 #include "llvm/MC/MCInstrDesc.h"
26 #include "llvm/Support/Debug.h"
30 SIInstrInfo::SIInstrInfo(const AMDGPUSubtarget &st)
31 : AMDGPUInstrInfo(st),
34 //===----------------------------------------------------------------------===//
35 // TargetInstrInfo callbacks
36 //===----------------------------------------------------------------------===//
38 static unsigned getNumOperandsNoGlue(SDNode *Node) {
39 unsigned N = Node->getNumOperands();
40 while (N && Node->getOperand(N - 1).getValueType() == MVT::Glue)
45 static SDValue findChainOperand(SDNode *Load) {
46 SDValue LastOp = Load->getOperand(getNumOperandsNoGlue(Load) - 1);
47 assert(LastOp.getValueType() == MVT::Other && "Chain missing from load node");
51 /// \brief Returns true if both nodes have the same value for the given
52 /// operand \p Op, or if both nodes do not have this operand.
53 static bool nodesHaveSameOperandValue(SDNode *N0, SDNode* N1, unsigned OpName) {
54 unsigned Opc0 = N0->getMachineOpcode();
55 unsigned Opc1 = N1->getMachineOpcode();
57 int Op0Idx = AMDGPU::getNamedOperandIdx(Opc0, OpName);
58 int Op1Idx = AMDGPU::getNamedOperandIdx(Opc1, OpName);
60 if (Op0Idx == -1 && Op1Idx == -1)
64 if ((Op0Idx == -1 && Op1Idx != -1) ||
65 (Op1Idx == -1 && Op0Idx != -1))
68 // getNamedOperandIdx returns the index for the MachineInstr's operands,
69 // which includes the result as the first operand. We are indexing into the
70 // MachineSDNode's operands, so we need to skip the result operand to get
75 return N0->getOperand(Op0Idx) == N1->getOperand(Op1Idx);
78 bool SIInstrInfo::areLoadsFromSameBasePtr(SDNode *Load0, SDNode *Load1,
80 int64_t &Offset1) const {
81 if (!Load0->isMachineOpcode() || !Load1->isMachineOpcode())
84 unsigned Opc0 = Load0->getMachineOpcode();
85 unsigned Opc1 = Load1->getMachineOpcode();
87 // Make sure both are actually loads.
88 if (!get(Opc0).mayLoad() || !get(Opc1).mayLoad())
91 if (isDS(Opc0) && isDS(Opc1)) {
93 // FIXME: Handle this case:
94 if (getNumOperandsNoGlue(Load0) != getNumOperandsNoGlue(Load1))
98 if (Load0->getOperand(1) != Load1->getOperand(1))
102 if (findChainOperand(Load0) != findChainOperand(Load1))
105 // Skip read2 / write2 variants for simplicity.
106 // TODO: We should report true if the used offsets are adjacent (excluded
108 if (AMDGPU::getNamedOperandIdx(Opc0, AMDGPU::OpName::data1) != -1 ||
109 AMDGPU::getNamedOperandIdx(Opc1, AMDGPU::OpName::data1) != -1)
112 Offset0 = cast<ConstantSDNode>(Load0->getOperand(2))->getZExtValue();
113 Offset1 = cast<ConstantSDNode>(Load1->getOperand(2))->getZExtValue();
117 if (isSMRD(Opc0) && isSMRD(Opc1)) {
118 assert(getNumOperandsNoGlue(Load0) == getNumOperandsNoGlue(Load1));
121 if (Load0->getOperand(0) != Load1->getOperand(0))
125 if (findChainOperand(Load0) != findChainOperand(Load1))
128 Offset0 = cast<ConstantSDNode>(Load0->getOperand(1))->getZExtValue();
129 Offset1 = cast<ConstantSDNode>(Load1->getOperand(1))->getZExtValue();
133 // MUBUF and MTBUF can access the same addresses.
134 if ((isMUBUF(Opc0) || isMTBUF(Opc0)) && (isMUBUF(Opc1) || isMTBUF(Opc1))) {
136 // MUBUF and MTBUF have vaddr at different indices.
137 if (!nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::soffset) ||
138 findChainOperand(Load0) != findChainOperand(Load1) ||
139 !nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::vaddr) ||
140 !nodesHaveSameOperandValue(Load0, Load1, AMDGPU::OpName::srsrc))
143 int OffIdx0 = AMDGPU::getNamedOperandIdx(Opc0, AMDGPU::OpName::offset);
144 int OffIdx1 = AMDGPU::getNamedOperandIdx(Opc1, AMDGPU::OpName::offset);
146 if (OffIdx0 == -1 || OffIdx1 == -1)
149 // getNamedOperandIdx returns the index for MachineInstrs. Since they
150 // inlcude the output in the operand list, but SDNodes don't, we need to
151 // subtract the index by one.
155 SDValue Off0 = Load0->getOperand(OffIdx0);
156 SDValue Off1 = Load1->getOperand(OffIdx1);
158 // The offset might be a FrameIndexSDNode.
159 if (!isa<ConstantSDNode>(Off0) || !isa<ConstantSDNode>(Off1))
162 Offset0 = cast<ConstantSDNode>(Off0)->getZExtValue();
163 Offset1 = cast<ConstantSDNode>(Off1)->getZExtValue();
170 static bool isStride64(unsigned Opc) {
172 case AMDGPU::DS_READ2ST64_B32:
173 case AMDGPU::DS_READ2ST64_B64:
174 case AMDGPU::DS_WRITE2ST64_B32:
175 case AMDGPU::DS_WRITE2ST64_B64:
182 bool SIInstrInfo::getLdStBaseRegImmOfs(MachineInstr *LdSt,
183 unsigned &BaseReg, unsigned &Offset,
184 const TargetRegisterInfo *TRI) const {
185 unsigned Opc = LdSt->getOpcode();
187 const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
188 AMDGPU::OpName::offset);
190 // Normal, single offset LDS instruction.
191 const MachineOperand *AddrReg = getNamedOperand(*LdSt,
192 AMDGPU::OpName::addr);
194 BaseReg = AddrReg->getReg();
195 Offset = OffsetImm->getImm();
199 // The 2 offset instructions use offset0 and offset1 instead. We can treat
200 // these as a load with a single offset if the 2 offsets are consecutive. We
201 // will use this for some partially aligned loads.
202 const MachineOperand *Offset0Imm = getNamedOperand(*LdSt,
203 AMDGPU::OpName::offset0);
204 const MachineOperand *Offset1Imm = getNamedOperand(*LdSt,
205 AMDGPU::OpName::offset1);
207 uint8_t Offset0 = Offset0Imm->getImm();
208 uint8_t Offset1 = Offset1Imm->getImm();
209 assert(Offset1 > Offset0);
211 if (Offset1 - Offset0 == 1) {
212 // Each of these offsets is in element sized units, so we need to convert
213 // to bytes of the individual reads.
217 EltSize = getOpRegClass(*LdSt, 0)->getSize() / 2;
219 assert(LdSt->mayStore());
220 int Data0Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::data0);
221 EltSize = getOpRegClass(*LdSt, Data0Idx)->getSize();
227 const MachineOperand *AddrReg = getNamedOperand(*LdSt,
228 AMDGPU::OpName::addr);
229 BaseReg = AddrReg->getReg();
230 Offset = EltSize * Offset0;
237 if (isMUBUF(Opc) || isMTBUF(Opc)) {
238 if (AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::soffset) != -1)
241 const MachineOperand *AddrReg = getNamedOperand(*LdSt,
242 AMDGPU::OpName::vaddr);
246 const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
247 AMDGPU::OpName::offset);
248 BaseReg = AddrReg->getReg();
249 Offset = OffsetImm->getImm();
254 const MachineOperand *OffsetImm = getNamedOperand(*LdSt,
255 AMDGPU::OpName::offset);
259 const MachineOperand *SBaseReg = getNamedOperand(*LdSt,
260 AMDGPU::OpName::sbase);
261 BaseReg = SBaseReg->getReg();
262 Offset = OffsetImm->getImm();
269 bool SIInstrInfo::shouldClusterLoads(MachineInstr *FirstLdSt,
270 MachineInstr *SecondLdSt,
271 unsigned NumLoads) const {
272 unsigned Opc0 = FirstLdSt->getOpcode();
273 unsigned Opc1 = SecondLdSt->getOpcode();
275 // TODO: This needs finer tuning
279 if (isDS(Opc0) && isDS(Opc1))
282 if (isSMRD(Opc0) && isSMRD(Opc1))
285 if ((isMUBUF(Opc0) || isMTBUF(Opc0)) && (isMUBUF(Opc1) || isMTBUF(Opc1)))
292 SIInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
293 MachineBasicBlock::iterator MI, DebugLoc DL,
294 unsigned DestReg, unsigned SrcReg,
295 bool KillSrc) const {
297 // If we are trying to copy to or from SCC, there is a bug somewhere else in
298 // the backend. While it may be theoretically possible to do this, it should
299 // never be necessary.
300 assert(DestReg != AMDGPU::SCC && SrcReg != AMDGPU::SCC);
302 static const int16_t Sub0_15[] = {
303 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3,
304 AMDGPU::sub4, AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7,
305 AMDGPU::sub8, AMDGPU::sub9, AMDGPU::sub10, AMDGPU::sub11,
306 AMDGPU::sub12, AMDGPU::sub13, AMDGPU::sub14, AMDGPU::sub15, 0
309 static const int16_t Sub0_7[] = {
310 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3,
311 AMDGPU::sub4, AMDGPU::sub5, AMDGPU::sub6, AMDGPU::sub7, 0
314 static const int16_t Sub0_3[] = {
315 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, AMDGPU::sub3, 0
318 static const int16_t Sub0_2[] = {
319 AMDGPU::sub0, AMDGPU::sub1, AMDGPU::sub2, 0
322 static const int16_t Sub0_1[] = {
323 AMDGPU::sub0, AMDGPU::sub1, 0
327 const int16_t *SubIndices;
329 if (AMDGPU::SReg_32RegClass.contains(DestReg)) {
330 assert(AMDGPU::SReg_32RegClass.contains(SrcReg));
331 BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B32), DestReg)
332 .addReg(SrcReg, getKillRegState(KillSrc));
335 } else if (AMDGPU::SReg_64RegClass.contains(DestReg)) {
336 assert(AMDGPU::SReg_64RegClass.contains(SrcReg));
337 BuildMI(MBB, MI, DL, get(AMDGPU::S_MOV_B64), DestReg)
338 .addReg(SrcReg, getKillRegState(KillSrc));
341 } else if (AMDGPU::SReg_128RegClass.contains(DestReg)) {
342 assert(AMDGPU::SReg_128RegClass.contains(SrcReg));
343 Opcode = AMDGPU::S_MOV_B32;
346 } else if (AMDGPU::SReg_256RegClass.contains(DestReg)) {
347 assert(AMDGPU::SReg_256RegClass.contains(SrcReg));
348 Opcode = AMDGPU::S_MOV_B32;
351 } else if (AMDGPU::SReg_512RegClass.contains(DestReg)) {
352 assert(AMDGPU::SReg_512RegClass.contains(SrcReg));
353 Opcode = AMDGPU::S_MOV_B32;
354 SubIndices = Sub0_15;
356 } else if (AMDGPU::VGPR_32RegClass.contains(DestReg)) {
357 assert(AMDGPU::VGPR_32RegClass.contains(SrcReg) ||
358 AMDGPU::SReg_32RegClass.contains(SrcReg));
359 BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DestReg)
360 .addReg(SrcReg, getKillRegState(KillSrc));
363 } else if (AMDGPU::VReg_64RegClass.contains(DestReg)) {
364 assert(AMDGPU::VReg_64RegClass.contains(SrcReg) ||
365 AMDGPU::SReg_64RegClass.contains(SrcReg));
366 Opcode = AMDGPU::V_MOV_B32_e32;
369 } else if (AMDGPU::VReg_96RegClass.contains(DestReg)) {
370 assert(AMDGPU::VReg_96RegClass.contains(SrcReg));
371 Opcode = AMDGPU::V_MOV_B32_e32;
374 } else if (AMDGPU::VReg_128RegClass.contains(DestReg)) {
375 assert(AMDGPU::VReg_128RegClass.contains(SrcReg) ||
376 AMDGPU::SReg_128RegClass.contains(SrcReg));
377 Opcode = AMDGPU::V_MOV_B32_e32;
380 } else if (AMDGPU::VReg_256RegClass.contains(DestReg)) {
381 assert(AMDGPU::VReg_256RegClass.contains(SrcReg) ||
382 AMDGPU::SReg_256RegClass.contains(SrcReg));
383 Opcode = AMDGPU::V_MOV_B32_e32;
386 } else if (AMDGPU::VReg_512RegClass.contains(DestReg)) {
387 assert(AMDGPU::VReg_512RegClass.contains(SrcReg) ||
388 AMDGPU::SReg_512RegClass.contains(SrcReg));
389 Opcode = AMDGPU::V_MOV_B32_e32;
390 SubIndices = Sub0_15;
393 llvm_unreachable("Can't copy register!");
396 while (unsigned SubIdx = *SubIndices++) {
397 MachineInstrBuilder Builder = BuildMI(MBB, MI, DL,
398 get(Opcode), RI.getSubReg(DestReg, SubIdx));
400 Builder.addReg(RI.getSubReg(SrcReg, SubIdx), getKillRegState(KillSrc));
403 Builder.addReg(DestReg, RegState::Define | RegState::Implicit);
407 unsigned SIInstrInfo::commuteOpcode(unsigned Opcode) const {
410 // Try to map original to commuted opcode
411 if ((NewOpc = AMDGPU::getCommuteRev(Opcode)) != -1)
414 // Try to map commuted to original opcode
415 if ((NewOpc = AMDGPU::getCommuteOrig(Opcode)) != -1)
421 unsigned SIInstrInfo::getMovOpcode(const TargetRegisterClass *DstRC) const {
423 if (DstRC->getSize() == 4) {
424 return RI.isSGPRClass(DstRC) ? AMDGPU::S_MOV_B32 : AMDGPU::V_MOV_B32_e32;
425 } else if (DstRC->getSize() == 8 && RI.isSGPRClass(DstRC)) {
426 return AMDGPU::S_MOV_B64;
427 } else if (DstRC->getSize() == 8 && !RI.isSGPRClass(DstRC)) {
428 return AMDGPU::V_MOV_B64_PSEUDO;
433 static bool shouldTryToSpillVGPRs(MachineFunction *MF) {
435 SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
437 // FIXME: Implement spilling for other shader types.
438 return MFI->getShaderType() == ShaderType::COMPUTE;
442 void SIInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
443 MachineBasicBlock::iterator MI,
444 unsigned SrcReg, bool isKill,
446 const TargetRegisterClass *RC,
447 const TargetRegisterInfo *TRI) const {
448 MachineFunction *MF = MBB.getParent();
449 SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
450 MachineFrameInfo *FrameInfo = MF->getFrameInfo();
451 DebugLoc DL = MBB.findDebugLoc(MI);
454 if (RI.isSGPRClass(RC)) {
455 // We are only allowed to create one new instruction when spilling
456 // registers, so we need to use pseudo instruction for spilling
458 switch (RC->getSize() * 8) {
459 case 32: Opcode = AMDGPU::SI_SPILL_S32_SAVE; break;
460 case 64: Opcode = AMDGPU::SI_SPILL_S64_SAVE; break;
461 case 128: Opcode = AMDGPU::SI_SPILL_S128_SAVE; break;
462 case 256: Opcode = AMDGPU::SI_SPILL_S256_SAVE; break;
463 case 512: Opcode = AMDGPU::SI_SPILL_S512_SAVE; break;
465 } else if(shouldTryToSpillVGPRs(MF) && RI.hasVGPRs(RC)) {
466 MFI->setHasSpilledVGPRs();
468 switch(RC->getSize() * 8) {
469 case 32: Opcode = AMDGPU::SI_SPILL_V32_SAVE; break;
470 case 64: Opcode = AMDGPU::SI_SPILL_V64_SAVE; break;
471 case 96: Opcode = AMDGPU::SI_SPILL_V96_SAVE; break;
472 case 128: Opcode = AMDGPU::SI_SPILL_V128_SAVE; break;
473 case 256: Opcode = AMDGPU::SI_SPILL_V256_SAVE; break;
474 case 512: Opcode = AMDGPU::SI_SPILL_V512_SAVE; break;
479 FrameInfo->setObjectAlignment(FrameIndex, 4);
480 BuildMI(MBB, MI, DL, get(Opcode))
482 .addFrameIndex(FrameIndex)
483 // Place-holder registers, these will be filled in by
484 // SIPrepareScratchRegs.
485 .addReg(AMDGPU::SGPR0_SGPR1, RegState::Undef)
486 .addReg(AMDGPU::SGPR0, RegState::Undef);
488 LLVMContext &Ctx = MF->getFunction()->getContext();
489 Ctx.emitError("SIInstrInfo::storeRegToStackSlot - Do not know how to"
491 BuildMI(MBB, MI, DL, get(AMDGPU::KILL))
496 void SIInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
497 MachineBasicBlock::iterator MI,
498 unsigned DestReg, int FrameIndex,
499 const TargetRegisterClass *RC,
500 const TargetRegisterInfo *TRI) const {
501 MachineFunction *MF = MBB.getParent();
502 MachineFrameInfo *FrameInfo = MF->getFrameInfo();
503 DebugLoc DL = MBB.findDebugLoc(MI);
506 if (RI.isSGPRClass(RC)){
507 switch(RC->getSize() * 8) {
508 case 32: Opcode = AMDGPU::SI_SPILL_S32_RESTORE; break;
509 case 64: Opcode = AMDGPU::SI_SPILL_S64_RESTORE; break;
510 case 128: Opcode = AMDGPU::SI_SPILL_S128_RESTORE; break;
511 case 256: Opcode = AMDGPU::SI_SPILL_S256_RESTORE; break;
512 case 512: Opcode = AMDGPU::SI_SPILL_S512_RESTORE; break;
514 } else if(shouldTryToSpillVGPRs(MF) && RI.hasVGPRs(RC)) {
515 switch(RC->getSize() * 8) {
516 case 32: Opcode = AMDGPU::SI_SPILL_V32_RESTORE; break;
517 case 64: Opcode = AMDGPU::SI_SPILL_V64_RESTORE; break;
518 case 96: Opcode = AMDGPU::SI_SPILL_V96_RESTORE; break;
519 case 128: Opcode = AMDGPU::SI_SPILL_V128_RESTORE; break;
520 case 256: Opcode = AMDGPU::SI_SPILL_V256_RESTORE; break;
521 case 512: Opcode = AMDGPU::SI_SPILL_V512_RESTORE; break;
526 FrameInfo->setObjectAlignment(FrameIndex, 4);
527 BuildMI(MBB, MI, DL, get(Opcode), DestReg)
528 .addFrameIndex(FrameIndex)
529 // Place-holder registers, these will be filled in by
530 // SIPrepareScratchRegs.
531 .addReg(AMDGPU::SGPR0_SGPR1, RegState::Undef)
532 .addReg(AMDGPU::SGPR0, RegState::Undef);
535 LLVMContext &Ctx = MF->getFunction()->getContext();
536 Ctx.emitError("SIInstrInfo::loadRegFromStackSlot - Do not know how to"
537 " restore register");
538 BuildMI(MBB, MI, DL, get(AMDGPU::IMPLICIT_DEF), DestReg);
542 /// \param @Offset Offset in bytes of the FrameIndex being spilled
543 unsigned SIInstrInfo::calculateLDSSpillAddress(MachineBasicBlock &MBB,
544 MachineBasicBlock::iterator MI,
545 RegScavenger *RS, unsigned TmpReg,
546 unsigned FrameOffset,
547 unsigned Size) const {
548 MachineFunction *MF = MBB.getParent();
549 SIMachineFunctionInfo *MFI = MF->getInfo<SIMachineFunctionInfo>();
550 const AMDGPUSubtarget &ST = MF->getTarget().getSubtarget<AMDGPUSubtarget>();
551 const SIRegisterInfo *TRI =
552 static_cast<const SIRegisterInfo*>(ST.getRegisterInfo());
553 DebugLoc DL = MBB.findDebugLoc(MI);
554 unsigned WorkGroupSize = MFI->getMaximumWorkGroupSize(*MF);
555 unsigned WavefrontSize = ST.getWavefrontSize();
557 unsigned TIDReg = MFI->getTIDReg();
558 if (!MFI->hasCalculatedTID()) {
559 MachineBasicBlock &Entry = MBB.getParent()->front();
560 MachineBasicBlock::iterator Insert = Entry.front();
561 DebugLoc DL = Insert->getDebugLoc();
563 TIDReg = RI.findUnusedRegister(MF->getRegInfo(), &AMDGPU::VGPR_32RegClass);
564 if (TIDReg == AMDGPU::NoRegister)
568 if (MFI->getShaderType() == ShaderType::COMPUTE &&
569 WorkGroupSize > WavefrontSize) {
571 unsigned TIDIGXReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_X);
572 unsigned TIDIGYReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_Y);
573 unsigned TIDIGZReg = TRI->getPreloadedValue(*MF, SIRegisterInfo::TIDIG_Z);
574 unsigned InputPtrReg =
575 TRI->getPreloadedValue(*MF, SIRegisterInfo::INPUT_PTR);
576 static const unsigned TIDIGRegs[3] = {
577 TIDIGXReg, TIDIGYReg, TIDIGZReg
579 for (unsigned Reg : TIDIGRegs) {
580 if (!Entry.isLiveIn(Reg))
581 Entry.addLiveIn(Reg);
584 RS->enterBasicBlock(&Entry);
585 unsigned STmp0 = RS->scavengeRegister(&AMDGPU::SGPR_32RegClass, 0);
586 unsigned STmp1 = RS->scavengeRegister(&AMDGPU::SGPR_32RegClass, 0);
587 BuildMI(Entry, Insert, DL, get(AMDGPU::S_LOAD_DWORD_IMM), STmp0)
589 .addImm(SI::KernelInputOffsets::NGROUPS_Z);
590 BuildMI(Entry, Insert, DL, get(AMDGPU::S_LOAD_DWORD_IMM), STmp1)
592 .addImm(SI::KernelInputOffsets::NGROUPS_Y);
594 // NGROUPS.X * NGROUPS.Y
595 BuildMI(Entry, Insert, DL, get(AMDGPU::S_MUL_I32), STmp1)
598 // (NGROUPS.X * NGROUPS.Y) * TIDIG.X
599 BuildMI(Entry, Insert, DL, get(AMDGPU::V_MUL_U32_U24_e32), TIDReg)
602 // NGROUPS.Z * TIDIG.Y + (NGROUPS.X * NGROPUS.Y * TIDIG.X)
603 BuildMI(Entry, Insert, DL, get(AMDGPU::V_MAD_U32_U24), TIDReg)
607 // (NGROUPS.Z * TIDIG.Y + (NGROUPS.X * NGROPUS.Y * TIDIG.X)) + TIDIG.Z
608 BuildMI(Entry, Insert, DL, get(AMDGPU::V_ADD_I32_e32), TIDReg)
613 BuildMI(Entry, Insert, DL, get(AMDGPU::V_MBCNT_LO_U32_B32_e64),
618 BuildMI(Entry, Insert, DL, get(AMDGPU::V_MBCNT_HI_U32_B32_e64),
624 BuildMI(Entry, Insert, DL, get(AMDGPU::V_LSHLREV_B32_e32),
628 MFI->setTIDReg(TIDReg);
631 // Add FrameIndex to LDS offset
632 unsigned LDSOffset = MFI->LDSSize + (FrameOffset * WorkGroupSize);
633 BuildMI(MBB, MI, DL, get(AMDGPU::V_ADD_I32_e32), TmpReg)
640 void SIInstrInfo::insertNOPs(MachineBasicBlock::iterator MI,
649 BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(AMDGPU::S_NOP))
654 bool SIInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
655 MachineBasicBlock &MBB = *MI->getParent();
656 DebugLoc DL = MBB.findDebugLoc(MI);
657 switch (MI->getOpcode()) {
658 default: return AMDGPUInstrInfo::expandPostRAPseudo(MI);
660 case AMDGPU::SI_CONSTDATA_PTR: {
661 unsigned Reg = MI->getOperand(0).getReg();
662 unsigned RegLo = RI.getSubReg(Reg, AMDGPU::sub0);
663 unsigned RegHi = RI.getSubReg(Reg, AMDGPU::sub1);
665 BuildMI(MBB, MI, DL, get(AMDGPU::S_GETPC_B64), Reg);
667 // Add 32-bit offset from this instruction to the start of the constant data.
668 BuildMI(MBB, MI, DL, get(AMDGPU::S_ADD_U32), RegLo)
670 .addTargetIndex(AMDGPU::TI_CONSTDATA_START)
671 .addReg(AMDGPU::SCC, RegState::Define | RegState::Implicit);
672 BuildMI(MBB, MI, DL, get(AMDGPU::S_ADDC_U32), RegHi)
675 .addReg(AMDGPU::SCC, RegState::Define | RegState::Implicit)
676 .addReg(AMDGPU::SCC, RegState::Implicit);
677 MI->eraseFromParent();
680 case AMDGPU::SGPR_USE:
681 // This is just a placeholder for register allocation.
682 MI->eraseFromParent();
685 case AMDGPU::V_MOV_B64_PSEUDO: {
686 unsigned Dst = MI->getOperand(0).getReg();
687 unsigned DstLo = RI.getSubReg(Dst, AMDGPU::sub0);
688 unsigned DstHi = RI.getSubReg(Dst, AMDGPU::sub1);
690 const MachineOperand &SrcOp = MI->getOperand(1);
691 // FIXME: Will this work for 64-bit floating point immediates?
692 assert(!SrcOp.isFPImm());
694 APInt Imm(64, SrcOp.getImm());
695 BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstLo)
696 .addImm(Imm.getLoBits(32).getZExtValue())
697 .addReg(Dst, RegState::Implicit);
698 BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstHi)
699 .addImm(Imm.getHiBits(32).getZExtValue())
700 .addReg(Dst, RegState::Implicit);
702 assert(SrcOp.isReg());
703 BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstLo)
704 .addReg(RI.getSubReg(SrcOp.getReg(), AMDGPU::sub0))
705 .addReg(Dst, RegState::Implicit);
706 BuildMI(MBB, MI, DL, get(AMDGPU::V_MOV_B32_e32), DstHi)
707 .addReg(RI.getSubReg(SrcOp.getReg(), AMDGPU::sub1))
708 .addReg(Dst, RegState::Implicit);
710 MI->eraseFromParent();
717 MachineInstr *SIInstrInfo::commuteInstruction(MachineInstr *MI,
720 if (MI->getNumOperands() < 3)
723 int Src0Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
724 AMDGPU::OpName::src0);
725 assert(Src0Idx != -1 && "Should always have src0 operand");
727 MachineOperand &Src0 = MI->getOperand(Src0Idx);
731 int Src1Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
732 AMDGPU::OpName::src1);
736 MachineOperand &Src1 = MI->getOperand(Src1Idx);
738 // Make sure it's legal to commute operands for VOP2.
739 if (isVOP2(MI->getOpcode()) &&
740 (!isOperandLegal(MI, Src0Idx, &Src1) ||
741 !isOperandLegal(MI, Src1Idx, &Src0))) {
746 // Allow commuting instructions with Imm operands.
747 if (NewMI || !Src1.isImm() ||
748 (!isVOP2(MI->getOpcode()) && !isVOP3(MI->getOpcode()))) {
752 // Be sure to copy the source modifiers to the right place.
753 if (MachineOperand *Src0Mods
754 = getNamedOperand(*MI, AMDGPU::OpName::src0_modifiers)) {
755 MachineOperand *Src1Mods
756 = getNamedOperand(*MI, AMDGPU::OpName::src1_modifiers);
758 int Src0ModsVal = Src0Mods->getImm();
759 if (!Src1Mods && Src0ModsVal != 0)
762 // XXX - This assert might be a lie. It might be useful to have a neg
763 // modifier with 0.0.
764 int Src1ModsVal = Src1Mods->getImm();
765 assert((Src1ModsVal == 0) && "Not expecting modifiers with immediates");
767 Src1Mods->setImm(Src0ModsVal);
768 Src0Mods->setImm(Src1ModsVal);
771 unsigned Reg = Src0.getReg();
772 unsigned SubReg = Src0.getSubReg();
774 Src0.ChangeToImmediate(Src1.getImm());
776 llvm_unreachable("Should only have immediates");
778 Src1.ChangeToRegister(Reg, false);
779 Src1.setSubReg(SubReg);
781 MI = TargetInstrInfo::commuteInstruction(MI, NewMI);
785 MI->setDesc(get(commuteOpcode(MI->getOpcode())));
790 // This needs to be implemented because the source modifiers may be inserted
791 // between the true commutable operands, and the base
792 // TargetInstrInfo::commuteInstruction uses it.
793 bool SIInstrInfo::findCommutedOpIndices(MachineInstr *MI,
795 unsigned &SrcOpIdx2) const {
796 const MCInstrDesc &MCID = MI->getDesc();
797 if (!MCID.isCommutable())
800 unsigned Opc = MI->getOpcode();
801 int Src0Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::src0);
805 // FIXME: Workaround TargetInstrInfo::commuteInstruction asserting on
807 if (!MI->getOperand(Src0Idx).isReg())
810 int Src1Idx = AMDGPU::getNamedOperandIdx(Opc, AMDGPU::OpName::src1);
814 if (!MI->getOperand(Src1Idx).isReg())
817 // If any source modifiers are set, the generic instruction commuting won't
818 // understand how to copy the source modifiers.
819 if (hasModifiersSet(*MI, AMDGPU::OpName::src0_modifiers) ||
820 hasModifiersSet(*MI, AMDGPU::OpName::src1_modifiers))
828 MachineInstr *SIInstrInfo::buildMovInstr(MachineBasicBlock *MBB,
829 MachineBasicBlock::iterator I,
831 unsigned SrcReg) const {
832 return BuildMI(*MBB, I, MBB->findDebugLoc(I), get(AMDGPU::V_MOV_B32_e32),
833 DstReg) .addReg(SrcReg);
836 bool SIInstrInfo::isMov(unsigned Opcode) const {
838 default: return false;
839 case AMDGPU::S_MOV_B32:
840 case AMDGPU::S_MOV_B64:
841 case AMDGPU::V_MOV_B32_e32:
842 case AMDGPU::V_MOV_B32_e64:
848 SIInstrInfo::isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
849 return RC != &AMDGPU::EXECRegRegClass;
853 SIInstrInfo::isTriviallyReMaterializable(const MachineInstr *MI,
854 AliasAnalysis *AA) const {
855 switch(MI->getOpcode()) {
856 default: return AMDGPUInstrInfo::isTriviallyReMaterializable(MI, AA);
857 case AMDGPU::S_MOV_B32:
858 case AMDGPU::S_MOV_B64:
859 case AMDGPU::V_MOV_B32_e32:
860 return MI->getOperand(1).isImm();
864 static bool offsetsDoNotOverlap(int WidthA, int OffsetA,
865 int WidthB, int OffsetB) {
866 int LowOffset = OffsetA < OffsetB ? OffsetA : OffsetB;
867 int HighOffset = OffsetA < OffsetB ? OffsetB : OffsetA;
868 int LowWidth = (LowOffset == OffsetA) ? WidthA : WidthB;
869 return LowOffset + LowWidth <= HighOffset;
872 bool SIInstrInfo::checkInstOffsetsDoNotOverlap(MachineInstr *MIa,
873 MachineInstr *MIb) const {
874 unsigned BaseReg0, Offset0;
875 unsigned BaseReg1, Offset1;
877 if (getLdStBaseRegImmOfs(MIa, BaseReg0, Offset0, &RI) &&
878 getLdStBaseRegImmOfs(MIb, BaseReg1, Offset1, &RI)) {
879 assert(MIa->hasOneMemOperand() && MIb->hasOneMemOperand() &&
880 "read2 / write2 not expected here yet");
881 unsigned Width0 = (*MIa->memoperands_begin())->getSize();
882 unsigned Width1 = (*MIb->memoperands_begin())->getSize();
883 if (BaseReg0 == BaseReg1 &&
884 offsetsDoNotOverlap(Width0, Offset0, Width1, Offset1)) {
892 bool SIInstrInfo::areMemAccessesTriviallyDisjoint(MachineInstr *MIa,
894 AliasAnalysis *AA) const {
895 unsigned Opc0 = MIa->getOpcode();
896 unsigned Opc1 = MIb->getOpcode();
898 assert(MIa && (MIa->mayLoad() || MIa->mayStore()) &&
899 "MIa must load from or modify a memory location");
900 assert(MIb && (MIb->mayLoad() || MIb->mayStore()) &&
901 "MIb must load from or modify a memory location");
903 if (MIa->hasUnmodeledSideEffects() || MIb->hasUnmodeledSideEffects())
906 // XXX - Can we relax this between address spaces?
907 if (MIa->hasOrderedMemoryRef() || MIb->hasOrderedMemoryRef())
910 // TODO: Should we check the address space from the MachineMemOperand? That
911 // would allow us to distinguish objects we know don't alias based on the
912 // underlying addres space, even if it was lowered to a different one,
913 // e.g. private accesses lowered to use MUBUF instructions on a scratch
917 return checkInstOffsetsDoNotOverlap(MIa, MIb);
919 return !isFLAT(Opc1);
922 if (isMUBUF(Opc0) || isMTBUF(Opc0)) {
923 if (isMUBUF(Opc1) || isMTBUF(Opc1))
924 return checkInstOffsetsDoNotOverlap(MIa, MIb);
926 return !isFLAT(Opc1) && !isSMRD(Opc1);
931 return checkInstOffsetsDoNotOverlap(MIa, MIb);
933 return !isFLAT(Opc1) && !isMUBUF(Opc0) && !isMTBUF(Opc0);
938 return checkInstOffsetsDoNotOverlap(MIa, MIb);
946 bool SIInstrInfo::isInlineConstant(const APInt &Imm) const {
947 int64_t SVal = Imm.getSExtValue();
948 if (SVal >= -16 && SVal <= 64)
951 if (Imm.getBitWidth() == 64) {
952 uint64_t Val = Imm.getZExtValue();
953 return (DoubleToBits(0.0) == Val) ||
954 (DoubleToBits(1.0) == Val) ||
955 (DoubleToBits(-1.0) == Val) ||
956 (DoubleToBits(0.5) == Val) ||
957 (DoubleToBits(-0.5) == Val) ||
958 (DoubleToBits(2.0) == Val) ||
959 (DoubleToBits(-2.0) == Val) ||
960 (DoubleToBits(4.0) == Val) ||
961 (DoubleToBits(-4.0) == Val);
964 // The actual type of the operand does not seem to matter as long
965 // as the bits match one of the inline immediate values. For example:
967 // -nan has the hexadecimal encoding of 0xfffffffe which is -2 in decimal,
968 // so it is a legal inline immediate.
970 // 1065353216 has the hexadecimal encoding 0x3f800000 which is 1.0f in
971 // floating-point, so it is a legal inline immediate.
972 uint32_t Val = Imm.getZExtValue();
974 return (FloatToBits(0.0f) == Val) ||
975 (FloatToBits(1.0f) == Val) ||
976 (FloatToBits(-1.0f) == Val) ||
977 (FloatToBits(0.5f) == Val) ||
978 (FloatToBits(-0.5f) == Val) ||
979 (FloatToBits(2.0f) == Val) ||
980 (FloatToBits(-2.0f) == Val) ||
981 (FloatToBits(4.0f) == Val) ||
982 (FloatToBits(-4.0f) == Val);
985 bool SIInstrInfo::isInlineConstant(const MachineOperand &MO) const {
987 return isInlineConstant(APInt(32, MO.getImm(), true));
992 bool SIInstrInfo::isLiteralConstant(const MachineOperand &MO) const {
993 return MO.isImm() && !isInlineConstant(MO);
996 static bool compareMachineOp(const MachineOperand &Op0,
997 const MachineOperand &Op1) {
998 if (Op0.getType() != Op1.getType())
1001 switch (Op0.getType()) {
1002 case MachineOperand::MO_Register:
1003 return Op0.getReg() == Op1.getReg();
1004 case MachineOperand::MO_Immediate:
1005 return Op0.getImm() == Op1.getImm();
1007 llvm_unreachable("Didn't expect to be comparing these operand types");
1011 bool SIInstrInfo::isImmOperandLegal(const MachineInstr *MI, unsigned OpNo,
1012 const MachineOperand &MO) const {
1013 const MCOperandInfo &OpInfo = get(MI->getOpcode()).OpInfo[OpNo];
1015 assert(MO.isImm() || MO.isTargetIndex() || MO.isFI());
1017 if (OpInfo.OperandType == MCOI::OPERAND_IMMEDIATE)
1020 if (OpInfo.RegClass < 0)
1023 if (isLiteralConstant(MO))
1024 return RI.opCanUseLiteralConstant(OpInfo.OperandType);
1026 return RI.opCanUseInlineConstant(OpInfo.OperandType);
1029 bool SIInstrInfo::canFoldOffset(unsigned OffsetSize, unsigned AS) const {
1031 case AMDGPUAS::GLOBAL_ADDRESS: {
1032 // MUBUF instructions a 12-bit offset in bytes.
1033 return isUInt<12>(OffsetSize);
1035 case AMDGPUAS::CONSTANT_ADDRESS: {
1036 // SMRD instructions have an 8-bit offset in dwords on SI and
1037 // a 20-bit offset in bytes on VI.
1038 if (RI.ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
1039 return isUInt<20>(OffsetSize);
1041 return (OffsetSize % 4 == 0) && isUInt<8>(OffsetSize / 4);
1043 case AMDGPUAS::LOCAL_ADDRESS:
1044 case AMDGPUAS::REGION_ADDRESS: {
1045 // The single offset versions have a 16-bit offset in bytes.
1046 return isUInt<16>(OffsetSize);
1048 case AMDGPUAS::PRIVATE_ADDRESS:
1049 // Indirect register addressing does not use any offsets.
1055 bool SIInstrInfo::hasVALU32BitEncoding(unsigned Opcode) const {
1056 int Op32 = AMDGPU::getVOPe32(Opcode);
1060 return pseudoToMCOpcode(Op32) != -1;
1063 bool SIInstrInfo::hasModifiers(unsigned Opcode) const {
1064 // The src0_modifier operand is present on all instructions
1065 // that have modifiers.
1067 return AMDGPU::getNamedOperandIdx(Opcode,
1068 AMDGPU::OpName::src0_modifiers) != -1;
1071 bool SIInstrInfo::hasModifiersSet(const MachineInstr &MI,
1072 unsigned OpName) const {
1073 const MachineOperand *Mods = getNamedOperand(MI, OpName);
1074 return Mods && Mods->getImm();
1077 bool SIInstrInfo::usesConstantBus(const MachineRegisterInfo &MRI,
1078 const MachineOperand &MO) const {
1079 // Literal constants use the constant bus.
1080 if (isLiteralConstant(MO))
1083 if (!MO.isReg() || !MO.isUse())
1086 if (TargetRegisterInfo::isVirtualRegister(MO.getReg()))
1087 return RI.isSGPRClass(MRI.getRegClass(MO.getReg()));
1089 // FLAT_SCR is just an SGPR pair.
1090 if (!MO.isImplicit() && (MO.getReg() == AMDGPU::FLAT_SCR))
1093 // EXEC register uses the constant bus.
1094 if (!MO.isImplicit() && MO.getReg() == AMDGPU::EXEC)
1097 // SGPRs use the constant bus
1098 if (MO.getReg() == AMDGPU::M0 || MO.getReg() == AMDGPU::VCC ||
1099 (!MO.isImplicit() &&
1100 (AMDGPU::SGPR_32RegClass.contains(MO.getReg()) ||
1101 AMDGPU::SGPR_64RegClass.contains(MO.getReg())))) {
1108 bool SIInstrInfo::verifyInstruction(const MachineInstr *MI,
1109 StringRef &ErrInfo) const {
1110 uint16_t Opcode = MI->getOpcode();
1111 const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
1112 int Src0Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src0);
1113 int Src1Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src1);
1114 int Src2Idx = AMDGPU::getNamedOperandIdx(Opcode, AMDGPU::OpName::src2);
1116 // Make sure the number of operands is correct.
1117 const MCInstrDesc &Desc = get(Opcode);
1118 if (!Desc.isVariadic() &&
1119 Desc.getNumOperands() != MI->getNumExplicitOperands()) {
1120 ErrInfo = "Instruction has wrong number of operands.";
1124 // Make sure the register classes are correct
1125 for (int i = 0, e = Desc.getNumOperands(); i != e; ++i) {
1126 if (MI->getOperand(i).isFPImm()) {
1127 ErrInfo = "FPImm Machine Operands are not supported. ISel should bitcast "
1128 "all fp values to integers.";
1132 switch (Desc.OpInfo[i].OperandType) {
1133 case MCOI::OPERAND_REGISTER:
1134 if (MI->getOperand(i).isImm() || MI->getOperand(i).isFPImm()) {
1135 ErrInfo = "Illegal immediate value for operand.";
1139 case AMDGPU::OPERAND_REG_IMM32:
1141 case AMDGPU::OPERAND_REG_INLINE_C:
1142 if (MI->getOperand(i).isImm() && !isInlineConstant(MI->getOperand(i))) {
1143 ErrInfo = "Illegal immediate value for operand.";
1147 case MCOI::OPERAND_IMMEDIATE:
1148 // Check if this operand is an immediate.
1149 // FrameIndex operands will be replaced by immediates, so they are
1151 if (!MI->getOperand(i).isImm() && !MI->getOperand(i).isFI()) {
1152 ErrInfo = "Expected immediate, but got non-immediate";
1160 if (!MI->getOperand(i).isReg())
1163 int RegClass = Desc.OpInfo[i].RegClass;
1164 if (RegClass != -1) {
1165 unsigned Reg = MI->getOperand(i).getReg();
1166 if (TargetRegisterInfo::isVirtualRegister(Reg))
1169 const TargetRegisterClass *RC = RI.getRegClass(RegClass);
1170 if (!RC->contains(Reg)) {
1171 ErrInfo = "Operand has incorrect register class.";
1179 if (isVOP1(Opcode) || isVOP2(Opcode) || isVOP3(Opcode) || isVOPC(Opcode)) {
1180 // Only look at the true operands. Only a real operand can use the constant
1181 // bus, and we don't want to check pseudo-operands like the source modifier
1183 const int OpIndices[] = { Src0Idx, Src1Idx, Src2Idx };
1185 unsigned ConstantBusCount = 0;
1186 unsigned SGPRUsed = AMDGPU::NoRegister;
1187 for (int OpIdx : OpIndices) {
1191 const MachineOperand &MO = MI->getOperand(OpIdx);
1192 if (usesConstantBus(MRI, MO)) {
1194 if (MO.getReg() != SGPRUsed)
1196 SGPRUsed = MO.getReg();
1202 if (ConstantBusCount > 1) {
1203 ErrInfo = "VOP* instruction uses the constant bus more than once";
1208 // Verify SRC1 for VOP2 and VOPC
1209 if (Src1Idx != -1 && (isVOP2(Opcode) || isVOPC(Opcode))) {
1210 const MachineOperand &Src1 = MI->getOperand(Src1Idx);
1212 ErrInfo = "VOP[2C] src1 cannot be an immediate.";
1218 if (isVOP3(Opcode)) {
1219 if (Src0Idx != -1 && isLiteralConstant(MI->getOperand(Src0Idx))) {
1220 ErrInfo = "VOP3 src0 cannot be a literal constant.";
1223 if (Src1Idx != -1 && isLiteralConstant(MI->getOperand(Src1Idx))) {
1224 ErrInfo = "VOP3 src1 cannot be a literal constant.";
1227 if (Src2Idx != -1 && isLiteralConstant(MI->getOperand(Src2Idx))) {
1228 ErrInfo = "VOP3 src2 cannot be a literal constant.";
1233 // Verify misc. restrictions on specific instructions.
1234 if (Desc.getOpcode() == AMDGPU::V_DIV_SCALE_F32 ||
1235 Desc.getOpcode() == AMDGPU::V_DIV_SCALE_F64) {
1236 const MachineOperand &Src0 = MI->getOperand(Src0Idx);
1237 const MachineOperand &Src1 = MI->getOperand(Src1Idx);
1238 const MachineOperand &Src2 = MI->getOperand(Src2Idx);
1239 if (Src0.isReg() && Src1.isReg() && Src2.isReg()) {
1240 if (!compareMachineOp(Src0, Src1) &&
1241 !compareMachineOp(Src0, Src2)) {
1242 ErrInfo = "v_div_scale_{f32|f64} require src0 = src1 or src2";
1251 unsigned SIInstrInfo::getVALUOp(const MachineInstr &MI) {
1252 switch (MI.getOpcode()) {
1253 default: return AMDGPU::INSTRUCTION_LIST_END;
1254 case AMDGPU::REG_SEQUENCE: return AMDGPU::REG_SEQUENCE;
1255 case AMDGPU::COPY: return AMDGPU::COPY;
1256 case AMDGPU::PHI: return AMDGPU::PHI;
1257 case AMDGPU::INSERT_SUBREG: return AMDGPU::INSERT_SUBREG;
1258 case AMDGPU::S_MOV_B32:
1259 return MI.getOperand(1).isReg() ?
1260 AMDGPU::COPY : AMDGPU::V_MOV_B32_e32;
1261 case AMDGPU::S_ADD_I32:
1262 case AMDGPU::S_ADD_U32: return AMDGPU::V_ADD_I32_e32;
1263 case AMDGPU::S_ADDC_U32: return AMDGPU::V_ADDC_U32_e32;
1264 case AMDGPU::S_SUB_I32:
1265 case AMDGPU::S_SUB_U32: return AMDGPU::V_SUB_I32_e32;
1266 case AMDGPU::S_SUBB_U32: return AMDGPU::V_SUBB_U32_e32;
1267 case AMDGPU::S_MUL_I32: return AMDGPU::V_MUL_LO_I32;
1268 case AMDGPU::S_AND_B32: return AMDGPU::V_AND_B32_e32;
1269 case AMDGPU::S_OR_B32: return AMDGPU::V_OR_B32_e32;
1270 case AMDGPU::S_XOR_B32: return AMDGPU::V_XOR_B32_e32;
1271 case AMDGPU::S_MIN_I32: return AMDGPU::V_MIN_I32_e32;
1272 case AMDGPU::S_MIN_U32: return AMDGPU::V_MIN_U32_e32;
1273 case AMDGPU::S_MAX_I32: return AMDGPU::V_MAX_I32_e32;
1274 case AMDGPU::S_MAX_U32: return AMDGPU::V_MAX_U32_e32;
1275 case AMDGPU::S_ASHR_I32: return AMDGPU::V_ASHR_I32_e32;
1276 case AMDGPU::S_ASHR_I64: return AMDGPU::V_ASHR_I64;
1277 case AMDGPU::S_LSHL_B32: return AMDGPU::V_LSHL_B32_e32;
1278 case AMDGPU::S_LSHL_B64: return AMDGPU::V_LSHL_B64;
1279 case AMDGPU::S_LSHR_B32: return AMDGPU::V_LSHR_B32_e32;
1280 case AMDGPU::S_LSHR_B64: return AMDGPU::V_LSHR_B64;
1281 case AMDGPU::S_SEXT_I32_I8: return AMDGPU::V_BFE_I32;
1282 case AMDGPU::S_SEXT_I32_I16: return AMDGPU::V_BFE_I32;
1283 case AMDGPU::S_BFE_U32: return AMDGPU::V_BFE_U32;
1284 case AMDGPU::S_BFE_I32: return AMDGPU::V_BFE_I32;
1285 case AMDGPU::S_BREV_B32: return AMDGPU::V_BFREV_B32_e32;
1286 case AMDGPU::S_NOT_B32: return AMDGPU::V_NOT_B32_e32;
1287 case AMDGPU::S_NOT_B64: return AMDGPU::V_NOT_B32_e32;
1288 case AMDGPU::S_CMP_EQ_I32: return AMDGPU::V_CMP_EQ_I32_e32;
1289 case AMDGPU::S_CMP_LG_I32: return AMDGPU::V_CMP_NE_I32_e32;
1290 case AMDGPU::S_CMP_GT_I32: return AMDGPU::V_CMP_GT_I32_e32;
1291 case AMDGPU::S_CMP_GE_I32: return AMDGPU::V_CMP_GE_I32_e32;
1292 case AMDGPU::S_CMP_LT_I32: return AMDGPU::V_CMP_LT_I32_e32;
1293 case AMDGPU::S_CMP_LE_I32: return AMDGPU::V_CMP_LE_I32_e32;
1294 case AMDGPU::S_LOAD_DWORD_IMM:
1295 case AMDGPU::S_LOAD_DWORD_SGPR: return AMDGPU::BUFFER_LOAD_DWORD_ADDR64;
1296 case AMDGPU::S_LOAD_DWORDX2_IMM:
1297 case AMDGPU::S_LOAD_DWORDX2_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX2_ADDR64;
1298 case AMDGPU::S_LOAD_DWORDX4_IMM:
1299 case AMDGPU::S_LOAD_DWORDX4_SGPR: return AMDGPU::BUFFER_LOAD_DWORDX4_ADDR64;
1300 case AMDGPU::S_BCNT1_I32_B32: return AMDGPU::V_BCNT_U32_B32_e64;
1301 case AMDGPU::S_FF1_I32_B32: return AMDGPU::V_FFBL_B32_e32;
1302 case AMDGPU::S_FLBIT_I32_B32: return AMDGPU::V_FFBH_U32_e32;
1306 bool SIInstrInfo::isSALUOpSupportedOnVALU(const MachineInstr &MI) const {
1307 return getVALUOp(MI) != AMDGPU::INSTRUCTION_LIST_END;
1310 const TargetRegisterClass *SIInstrInfo::getOpRegClass(const MachineInstr &MI,
1311 unsigned OpNo) const {
1312 const MachineRegisterInfo &MRI = MI.getParent()->getParent()->getRegInfo();
1313 const MCInstrDesc &Desc = get(MI.getOpcode());
1314 if (MI.isVariadic() || OpNo >= Desc.getNumOperands() ||
1315 Desc.OpInfo[OpNo].RegClass == -1) {
1316 unsigned Reg = MI.getOperand(OpNo).getReg();
1318 if (TargetRegisterInfo::isVirtualRegister(Reg))
1319 return MRI.getRegClass(Reg);
1320 return RI.getRegClass(Reg);
1323 unsigned RCID = Desc.OpInfo[OpNo].RegClass;
1324 return RI.getRegClass(RCID);
1327 bool SIInstrInfo::canReadVGPR(const MachineInstr &MI, unsigned OpNo) const {
1328 switch (MI.getOpcode()) {
1330 case AMDGPU::REG_SEQUENCE:
1332 case AMDGPU::INSERT_SUBREG:
1333 return RI.hasVGPRs(getOpRegClass(MI, 0));
1335 return RI.hasVGPRs(getOpRegClass(MI, OpNo));
1339 void SIInstrInfo::legalizeOpWithMove(MachineInstr *MI, unsigned OpIdx) const {
1340 MachineBasicBlock::iterator I = MI;
1341 MachineBasicBlock *MBB = MI->getParent();
1342 MachineOperand &MO = MI->getOperand(OpIdx);
1343 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
1344 unsigned RCID = get(MI->getOpcode()).OpInfo[OpIdx].RegClass;
1345 const TargetRegisterClass *RC = RI.getRegClass(RCID);
1346 unsigned Opcode = AMDGPU::V_MOV_B32_e32;
1348 Opcode = AMDGPU::COPY;
1349 else if (RI.isSGPRClass(RC))
1350 Opcode = AMDGPU::S_MOV_B32;
1353 const TargetRegisterClass *VRC = RI.getEquivalentVGPRClass(RC);
1354 if (RI.getCommonSubClass(&AMDGPU::VReg_64RegClass, VRC))
1355 VRC = &AMDGPU::VReg_64RegClass;
1357 VRC = &AMDGPU::VGPR_32RegClass;
1359 unsigned Reg = MRI.createVirtualRegister(VRC);
1360 DebugLoc DL = MBB->findDebugLoc(I);
1361 BuildMI(*MI->getParent(), I, DL, get(Opcode), Reg)
1363 MO.ChangeToRegister(Reg, false);
1366 unsigned SIInstrInfo::buildExtractSubReg(MachineBasicBlock::iterator MI,
1367 MachineRegisterInfo &MRI,
1368 MachineOperand &SuperReg,
1369 const TargetRegisterClass *SuperRC,
1371 const TargetRegisterClass *SubRC)
1373 assert(SuperReg.isReg());
1375 unsigned NewSuperReg = MRI.createVirtualRegister(SuperRC);
1376 unsigned SubReg = MRI.createVirtualRegister(SubRC);
1378 // Just in case the super register is itself a sub-register, copy it to a new
1379 // value so we don't need to worry about merging its subreg index with the
1380 // SubIdx passed to this function. The register coalescer should be able to
1381 // eliminate this extra copy.
1382 MachineBasicBlock *MBB = MI->getParent();
1383 DebugLoc DL = MI->getDebugLoc();
1385 BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), NewSuperReg)
1386 .addReg(SuperReg.getReg(), 0, SuperReg.getSubReg());
1388 BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), SubReg)
1389 .addReg(NewSuperReg, 0, SubIdx);
1394 MachineOperand SIInstrInfo::buildExtractSubRegOrImm(
1395 MachineBasicBlock::iterator MII,
1396 MachineRegisterInfo &MRI,
1398 const TargetRegisterClass *SuperRC,
1400 const TargetRegisterClass *SubRC) const {
1402 // XXX - Is there a better way to do this?
1403 if (SubIdx == AMDGPU::sub0)
1404 return MachineOperand::CreateImm(Op.getImm() & 0xFFFFFFFF);
1405 if (SubIdx == AMDGPU::sub1)
1406 return MachineOperand::CreateImm(Op.getImm() >> 32);
1408 llvm_unreachable("Unhandled register index for immediate");
1411 unsigned SubReg = buildExtractSubReg(MII, MRI, Op, SuperRC,
1413 return MachineOperand::CreateReg(SubReg, false);
1416 unsigned SIInstrInfo::split64BitImm(SmallVectorImpl<MachineInstr *> &Worklist,
1417 MachineBasicBlock::iterator MI,
1418 MachineRegisterInfo &MRI,
1419 const TargetRegisterClass *RC,
1420 const MachineOperand &Op) const {
1421 MachineBasicBlock *MBB = MI->getParent();
1422 DebugLoc DL = MI->getDebugLoc();
1423 unsigned LoDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1424 unsigned HiDst = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1425 unsigned Dst = MRI.createVirtualRegister(RC);
1427 MachineInstr *Lo = BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32),
1429 .addImm(Op.getImm() & 0xFFFFFFFF);
1430 MachineInstr *Hi = BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32),
1432 .addImm(Op.getImm() >> 32);
1434 BuildMI(*MBB, MI, DL, get(TargetOpcode::REG_SEQUENCE), Dst)
1436 .addImm(AMDGPU::sub0)
1438 .addImm(AMDGPU::sub1);
1440 Worklist.push_back(Lo);
1441 Worklist.push_back(Hi);
1446 // Change the order of operands from (0, 1, 2) to (0, 2, 1)
1447 void SIInstrInfo::swapOperands(MachineBasicBlock::iterator Inst) const {
1448 assert(Inst->getNumExplicitOperands() == 3);
1449 MachineOperand Op1 = Inst->getOperand(1);
1450 Inst->RemoveOperand(1);
1451 Inst->addOperand(Op1);
1454 bool SIInstrInfo::isOperandLegal(const MachineInstr *MI, unsigned OpIdx,
1455 const MachineOperand *MO) const {
1456 const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
1457 const MCInstrDesc &InstDesc = get(MI->getOpcode());
1458 const MCOperandInfo &OpInfo = InstDesc.OpInfo[OpIdx];
1459 const TargetRegisterClass *DefinedRC =
1460 OpInfo.RegClass != -1 ? RI.getRegClass(OpInfo.RegClass) : nullptr;
1462 MO = &MI->getOperand(OpIdx);
1464 if (isVALU(InstDesc.Opcode) && usesConstantBus(MRI, *MO)) {
1466 MO->isReg() ? MO->getReg() : (unsigned)AMDGPU::NoRegister;
1467 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
1470 if (usesConstantBus(MRI, MI->getOperand(i)) &&
1471 MI->getOperand(i).isReg() && MI->getOperand(i).getReg() != SGPRUsed) {
1479 const TargetRegisterClass *RC = MRI.getRegClass(MO->getReg());
1481 // In order to be legal, the common sub-class must be equal to the
1482 // class of the current operand. For example:
1484 // v_mov_b32 s0 ; Operand defined as vsrc_32
1485 // ; RI.getCommonSubClass(s0,vsrc_32) = sgpr ; LEGAL
1487 // s_sendmsg 0, s0 ; Operand defined as m0reg
1488 // ; RI.getCommonSubClass(s0,m0reg) = m0reg ; NOT LEGAL
1490 return RI.getCommonSubClass(RC, RI.getRegClass(OpInfo.RegClass)) == RC;
1494 // Handle non-register types that are treated like immediates.
1495 assert(MO->isImm() || MO->isTargetIndex() || MO->isFI());
1498 // This operand expects an immediate.
1502 return isImmOperandLegal(MI, OpIdx, *MO);
1505 void SIInstrInfo::legalizeOperands(MachineInstr *MI) const {
1506 MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
1508 int Src0Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
1509 AMDGPU::OpName::src0);
1510 int Src1Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
1511 AMDGPU::OpName::src1);
1512 int Src2Idx = AMDGPU::getNamedOperandIdx(MI->getOpcode(),
1513 AMDGPU::OpName::src2);
1516 if (isVOP2(MI->getOpcode()) && Src1Idx != -1) {
1518 if (!isOperandLegal(MI, Src0Idx))
1519 legalizeOpWithMove(MI, Src0Idx);
1522 if (isOperandLegal(MI, Src1Idx))
1525 // Usually src0 of VOP2 instructions allow more types of inputs
1526 // than src1, so try to commute the instruction to decrease our
1527 // chances of having to insert a MOV instruction to legalize src1.
1528 if (MI->isCommutable()) {
1529 if (commuteInstruction(MI))
1530 // If we are successful in commuting, then we know MI is legal, so
1535 legalizeOpWithMove(MI, Src1Idx);
1539 // XXX - Do any VOP3 instructions read VCC?
1541 if (isVOP3(MI->getOpcode())) {
1542 int VOP3Idx[3] = { Src0Idx, Src1Idx, Src2Idx };
1544 // Find the one SGPR operand we are allowed to use.
1545 unsigned SGPRReg = findUsedSGPR(MI, VOP3Idx);
1547 for (unsigned i = 0; i < 3; ++i) {
1548 int Idx = VOP3Idx[i];
1551 MachineOperand &MO = MI->getOperand(Idx);
1554 if (!RI.isSGPRClass(MRI.getRegClass(MO.getReg())))
1555 continue; // VGPRs are legal
1557 assert(MO.getReg() != AMDGPU::SCC && "SCC operand to VOP3 instruction");
1559 if (SGPRReg == AMDGPU::NoRegister || SGPRReg == MO.getReg()) {
1560 SGPRReg = MO.getReg();
1561 // We can use one SGPR in each VOP3 instruction.
1564 } else if (!isLiteralConstant(MO)) {
1565 // If it is not a register and not a literal constant, then it must be
1566 // an inline constant which is always legal.
1569 // If we make it this far, then the operand is not legal and we must
1571 legalizeOpWithMove(MI, Idx);
1575 // Legalize REG_SEQUENCE and PHI
1576 // The register class of the operands much be the same type as the register
1577 // class of the output.
1578 if (MI->getOpcode() == AMDGPU::REG_SEQUENCE ||
1579 MI->getOpcode() == AMDGPU::PHI) {
1580 const TargetRegisterClass *RC = nullptr, *SRC = nullptr, *VRC = nullptr;
1581 for (unsigned i = 1, e = MI->getNumOperands(); i != e; i+=2) {
1582 if (!MI->getOperand(i).isReg() ||
1583 !TargetRegisterInfo::isVirtualRegister(MI->getOperand(i).getReg()))
1585 const TargetRegisterClass *OpRC =
1586 MRI.getRegClass(MI->getOperand(i).getReg());
1587 if (RI.hasVGPRs(OpRC)) {
1594 // If any of the operands are VGPR registers, then they all most be
1595 // otherwise we will create illegal VGPR->SGPR copies when legalizing
1597 if (VRC || !RI.isSGPRClass(getOpRegClass(*MI, 0))) {
1600 VRC = RI.getEquivalentVGPRClass(SRC);
1607 // Update all the operands so they have the same type.
1608 for (unsigned i = 1, e = MI->getNumOperands(); i != e; i+=2) {
1609 if (!MI->getOperand(i).isReg() ||
1610 !TargetRegisterInfo::isVirtualRegister(MI->getOperand(i).getReg()))
1612 unsigned DstReg = MRI.createVirtualRegister(RC);
1613 MachineBasicBlock *InsertBB;
1614 MachineBasicBlock::iterator Insert;
1615 if (MI->getOpcode() == AMDGPU::REG_SEQUENCE) {
1616 InsertBB = MI->getParent();
1619 // MI is a PHI instruction.
1620 InsertBB = MI->getOperand(i + 1).getMBB();
1621 Insert = InsertBB->getFirstTerminator();
1623 BuildMI(*InsertBB, Insert, MI->getDebugLoc(),
1624 get(AMDGPU::COPY), DstReg)
1625 .addOperand(MI->getOperand(i));
1626 MI->getOperand(i).setReg(DstReg);
1630 // Legalize INSERT_SUBREG
1631 // src0 must have the same register class as dst
1632 if (MI->getOpcode() == AMDGPU::INSERT_SUBREG) {
1633 unsigned Dst = MI->getOperand(0).getReg();
1634 unsigned Src0 = MI->getOperand(1).getReg();
1635 const TargetRegisterClass *DstRC = MRI.getRegClass(Dst);
1636 const TargetRegisterClass *Src0RC = MRI.getRegClass(Src0);
1637 if (DstRC != Src0RC) {
1638 MachineBasicBlock &MBB = *MI->getParent();
1639 unsigned NewSrc0 = MRI.createVirtualRegister(DstRC);
1640 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::COPY), NewSrc0)
1642 MI->getOperand(1).setReg(NewSrc0);
1647 // Legalize MUBUF* instructions
1648 // FIXME: If we start using the non-addr64 instructions for compute, we
1649 // may need to legalize them here.
1651 AMDGPU::getNamedOperandIdx(MI->getOpcode(), AMDGPU::OpName::srsrc);
1652 if (SRsrcIdx != -1) {
1653 // We have an MUBUF instruction
1654 MachineOperand *SRsrc = &MI->getOperand(SRsrcIdx);
1655 unsigned SRsrcRC = get(MI->getOpcode()).OpInfo[SRsrcIdx].RegClass;
1656 if (RI.getCommonSubClass(MRI.getRegClass(SRsrc->getReg()),
1657 RI.getRegClass(SRsrcRC))) {
1658 // The operands are legal.
1659 // FIXME: We may need to legalize operands besided srsrc.
1663 MachineBasicBlock &MBB = *MI->getParent();
1664 // Extract the the ptr from the resource descriptor.
1666 // SRsrcPtrLo = srsrc:sub0
1667 unsigned SRsrcPtrLo = buildExtractSubReg(MI, MRI, *SRsrc,
1668 &AMDGPU::VReg_128RegClass, AMDGPU::sub0, &AMDGPU::VGPR_32RegClass);
1670 // SRsrcPtrHi = srsrc:sub1
1671 unsigned SRsrcPtrHi = buildExtractSubReg(MI, MRI, *SRsrc,
1672 &AMDGPU::VReg_128RegClass, AMDGPU::sub1, &AMDGPU::VGPR_32RegClass);
1674 // Create an empty resource descriptor
1675 unsigned Zero64 = MRI.createVirtualRegister(&AMDGPU::SReg_64RegClass);
1676 unsigned SRsrcFormatLo = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1677 unsigned SRsrcFormatHi = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1678 unsigned NewSRsrc = MRI.createVirtualRegister(&AMDGPU::SReg_128RegClass);
1679 uint64_t RsrcDataFormat = getDefaultRsrcDataFormat();
1682 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B64),
1686 // SRsrcFormatLo = RSRC_DATA_FORMAT{31-0}
1687 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
1689 .addImm(RsrcDataFormat & 0xFFFFFFFF);
1691 // SRsrcFormatHi = RSRC_DATA_FORMAT{63-32}
1692 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
1694 .addImm(RsrcDataFormat >> 32);
1696 // NewSRsrc = {Zero64, SRsrcFormat}
1697 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE),
1700 .addImm(AMDGPU::sub0_sub1)
1701 .addReg(SRsrcFormatLo)
1702 .addImm(AMDGPU::sub2)
1703 .addReg(SRsrcFormatHi)
1704 .addImm(AMDGPU::sub3);
1706 MachineOperand *VAddr = getNamedOperand(*MI, AMDGPU::OpName::vaddr);
1707 unsigned NewVAddr = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
1708 unsigned NewVAddrLo;
1709 unsigned NewVAddrHi;
1711 // This is already an ADDR64 instruction so we need to add the pointer
1712 // extracted from the resource descriptor to the current value of VAddr.
1713 NewVAddrLo = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
1714 NewVAddrHi = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
1716 // NewVaddrLo = SRsrcPtrLo + VAddr:sub0
1717 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::V_ADD_I32_e32),
1720 .addReg(VAddr->getReg(), 0, AMDGPU::sub0)
1721 .addReg(AMDGPU::VCC, RegState::ImplicitDefine);
1723 // NewVaddrHi = SRsrcPtrHi + VAddr:sub1
1724 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::V_ADDC_U32_e32),
1727 .addReg(VAddr->getReg(), 0, AMDGPU::sub1)
1728 .addReg(AMDGPU::VCC, RegState::ImplicitDefine)
1729 .addReg(AMDGPU::VCC, RegState::Implicit);
1732 // This instructions is the _OFFSET variant, so we need to convert it to
1734 MachineOperand *VData = getNamedOperand(*MI, AMDGPU::OpName::vdata);
1735 MachineOperand *Offset = getNamedOperand(*MI, AMDGPU::OpName::offset);
1736 MachineOperand *SOffset = getNamedOperand(*MI, AMDGPU::OpName::soffset);
1737 assert(SOffset->isImm() && SOffset->getImm() == 0 && "Legalizing MUBUF "
1738 "with non-zero soffset is not implemented");
1741 // Create the new instruction.
1742 unsigned Addr64Opcode = AMDGPU::getAddr64Inst(MI->getOpcode());
1743 MachineInstr *Addr64 =
1744 BuildMI(MBB, MI, MI->getDebugLoc(), get(Addr64Opcode))
1747 .addReg(AMDGPU::NoRegister) // Dummy value for vaddr.
1748 // This will be replaced later
1749 // with the new value of vaddr.
1750 .addOperand(*Offset);
1752 MI->removeFromParent();
1755 NewVAddrLo = SRsrcPtrLo;
1756 NewVAddrHi = SRsrcPtrHi;
1757 VAddr = getNamedOperand(*MI, AMDGPU::OpName::vaddr);
1758 SRsrc = getNamedOperand(*MI, AMDGPU::OpName::srsrc);
1761 // NewVaddr = {NewVaddrHi, NewVaddrLo}
1762 BuildMI(MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE),
1765 .addImm(AMDGPU::sub0)
1767 .addImm(AMDGPU::sub1);
1770 // Update the instruction to use NewVaddr
1771 VAddr->setReg(NewVAddr);
1772 // Update the instruction to use NewSRsrc
1773 SRsrc->setReg(NewSRsrc);
1777 void SIInstrInfo::splitSMRD(MachineInstr *MI,
1778 const TargetRegisterClass *HalfRC,
1779 unsigned HalfImmOp, unsigned HalfSGPROp,
1780 MachineInstr *&Lo, MachineInstr *&Hi) const {
1782 DebugLoc DL = MI->getDebugLoc();
1783 MachineBasicBlock *MBB = MI->getParent();
1784 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
1785 unsigned RegLo = MRI.createVirtualRegister(HalfRC);
1786 unsigned RegHi = MRI.createVirtualRegister(HalfRC);
1787 unsigned HalfSize = HalfRC->getSize();
1788 const MachineOperand *OffOp =
1789 getNamedOperand(*MI, AMDGPU::OpName::offset);
1790 const MachineOperand *SBase = getNamedOperand(*MI, AMDGPU::OpName::sbase);
1792 // The SMRD has an 8-bit offset in dwords on SI and a 20-bit offset in bytes
1795 bool isVI = RI.ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS;
1796 unsigned OffScale = isVI ? 1 : 4;
1797 // Handle the _IMM variant
1798 unsigned LoOffset = OffOp->getImm() * OffScale;
1799 unsigned HiOffset = LoOffset + HalfSize;
1800 Lo = BuildMI(*MBB, MI, DL, get(HalfImmOp), RegLo)
1802 .addImm(LoOffset / OffScale);
1804 if (!isUInt<20>(HiOffset) || (!isVI && !isUInt<8>(HiOffset / OffScale))) {
1805 unsigned OffsetSGPR =
1806 MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
1807 BuildMI(*MBB, MI, DL, get(AMDGPU::S_MOV_B32), OffsetSGPR)
1808 .addImm(HiOffset); // The offset in register is in bytes.
1809 Hi = BuildMI(*MBB, MI, DL, get(HalfSGPROp), RegHi)
1811 .addReg(OffsetSGPR);
1813 Hi = BuildMI(*MBB, MI, DL, get(HalfImmOp), RegHi)
1815 .addImm(HiOffset / OffScale);
1818 // Handle the _SGPR variant
1819 MachineOperand *SOff = getNamedOperand(*MI, AMDGPU::OpName::soff);
1820 Lo = BuildMI(*MBB, MI, DL, get(HalfSGPROp), RegLo)
1823 unsigned OffsetSGPR = MRI.createVirtualRegister(&AMDGPU::SReg_32RegClass);
1824 BuildMI(*MBB, MI, DL, get(AMDGPU::S_ADD_I32), OffsetSGPR)
1827 Hi = BuildMI(*MBB, MI, DL, get(HalfSGPROp))
1829 .addReg(OffsetSGPR);
1832 unsigned SubLo, SubHi;
1835 SubLo = AMDGPU::sub0;
1836 SubHi = AMDGPU::sub1;
1839 SubLo = AMDGPU::sub0_sub1;
1840 SubHi = AMDGPU::sub2_sub3;
1843 SubLo = AMDGPU::sub0_sub1_sub2_sub3;
1844 SubHi = AMDGPU::sub4_sub5_sub6_sub7;
1847 SubLo = AMDGPU::sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7;
1848 SubHi = AMDGPU::sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15;
1851 llvm_unreachable("Unhandled HalfSize");
1854 BuildMI(*MBB, MI, DL, get(AMDGPU::REG_SEQUENCE))
1855 .addOperand(MI->getOperand(0))
1862 void SIInstrInfo::moveSMRDToVALU(MachineInstr *MI, MachineRegisterInfo &MRI) const {
1863 MachineBasicBlock *MBB = MI->getParent();
1864 switch (MI->getOpcode()) {
1865 case AMDGPU::S_LOAD_DWORD_IMM:
1866 case AMDGPU::S_LOAD_DWORD_SGPR:
1867 case AMDGPU::S_LOAD_DWORDX2_IMM:
1868 case AMDGPU::S_LOAD_DWORDX2_SGPR:
1869 case AMDGPU::S_LOAD_DWORDX4_IMM:
1870 case AMDGPU::S_LOAD_DWORDX4_SGPR: {
1871 unsigned NewOpcode = getVALUOp(*MI);
1875 if (MI->getOperand(2).isReg()) {
1876 RegOffset = MI->getOperand(2).getReg();
1879 assert(MI->getOperand(2).isImm());
1880 // SMRD instructions take a dword offsets on SI and byte offset on VI
1881 // and MUBUF instructions always take a byte offset.
1882 ImmOffset = MI->getOperand(2).getImm();
1883 if (RI.ST.getGeneration() <= AMDGPUSubtarget::SEA_ISLANDS)
1885 RegOffset = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1887 if (isUInt<12>(ImmOffset)) {
1888 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
1892 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32),
1899 unsigned SRsrc = MRI.createVirtualRegister(&AMDGPU::SReg_128RegClass);
1900 unsigned DWord0 = RegOffset;
1901 unsigned DWord1 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1902 unsigned DWord2 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1903 unsigned DWord3 = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
1904 uint64_t RsrcDataFormat = getDefaultRsrcDataFormat();
1906 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord1)
1908 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord2)
1909 .addImm(RsrcDataFormat & 0xFFFFFFFF);
1910 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::S_MOV_B32), DWord3)
1911 .addImm(RsrcDataFormat >> 32);
1912 BuildMI(*MBB, MI, MI->getDebugLoc(), get(AMDGPU::REG_SEQUENCE), SRsrc)
1914 .addImm(AMDGPU::sub0)
1916 .addImm(AMDGPU::sub1)
1918 .addImm(AMDGPU::sub2)
1920 .addImm(AMDGPU::sub3);
1921 MI->setDesc(get(NewOpcode));
1922 if (MI->getOperand(2).isReg()) {
1923 MI->getOperand(2).setReg(MI->getOperand(1).getReg());
1925 MI->getOperand(2).ChangeToRegister(MI->getOperand(1).getReg(), false);
1927 MI->getOperand(1).setReg(SRsrc);
1928 MI->addOperand(*MBB->getParent(), MachineOperand::CreateImm(ImmOffset));
1930 const TargetRegisterClass *NewDstRC =
1931 RI.getRegClass(get(NewOpcode).OpInfo[0].RegClass);
1933 unsigned DstReg = MI->getOperand(0).getReg();
1934 unsigned NewDstReg = MRI.createVirtualRegister(NewDstRC);
1935 MRI.replaceRegWith(DstReg, NewDstReg);
1938 case AMDGPU::S_LOAD_DWORDX8_IMM:
1939 case AMDGPU::S_LOAD_DWORDX8_SGPR: {
1940 MachineInstr *Lo, *Hi;
1941 splitSMRD(MI, &AMDGPU::SReg_128RegClass, AMDGPU::S_LOAD_DWORDX4_IMM,
1942 AMDGPU::S_LOAD_DWORDX4_SGPR, Lo, Hi);
1943 MI->eraseFromParent();
1944 moveSMRDToVALU(Lo, MRI);
1945 moveSMRDToVALU(Hi, MRI);
1949 case AMDGPU::S_LOAD_DWORDX16_IMM:
1950 case AMDGPU::S_LOAD_DWORDX16_SGPR: {
1951 MachineInstr *Lo, *Hi;
1952 splitSMRD(MI, &AMDGPU::SReg_256RegClass, AMDGPU::S_LOAD_DWORDX8_IMM,
1953 AMDGPU::S_LOAD_DWORDX8_SGPR, Lo, Hi);
1954 MI->eraseFromParent();
1955 moveSMRDToVALU(Lo, MRI);
1956 moveSMRDToVALU(Hi, MRI);
1962 void SIInstrInfo::moveToVALU(MachineInstr &TopInst) const {
1963 SmallVector<MachineInstr *, 128> Worklist;
1964 Worklist.push_back(&TopInst);
1966 while (!Worklist.empty()) {
1967 MachineInstr *Inst = Worklist.pop_back_val();
1968 MachineBasicBlock *MBB = Inst->getParent();
1969 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
1971 unsigned Opcode = Inst->getOpcode();
1972 unsigned NewOpcode = getVALUOp(*Inst);
1974 // Handle some special cases
1977 if (isSMRD(Inst->getOpcode())) {
1978 moveSMRDToVALU(Inst, MRI);
1981 case AMDGPU::S_MOV_B64: {
1982 DebugLoc DL = Inst->getDebugLoc();
1984 // If the source operand is a register we can replace this with a
1986 if (Inst->getOperand(1).isReg()) {
1987 MachineInstr *Copy = BuildMI(*MBB, Inst, DL, get(TargetOpcode::COPY))
1988 .addOperand(Inst->getOperand(0))
1989 .addOperand(Inst->getOperand(1));
1990 Worklist.push_back(Copy);
1992 // Otherwise, we need to split this into two movs, because there is
1993 // no 64-bit VALU move instruction.
1994 unsigned Reg = Inst->getOperand(0).getReg();
1995 unsigned Dst = split64BitImm(Worklist,
1998 MRI.getRegClass(Reg),
1999 Inst->getOperand(1));
2000 MRI.replaceRegWith(Reg, Dst);
2002 Inst->eraseFromParent();
2005 case AMDGPU::S_AND_B64:
2006 splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_AND_B32);
2007 Inst->eraseFromParent();
2010 case AMDGPU::S_OR_B64:
2011 splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_OR_B32);
2012 Inst->eraseFromParent();
2015 case AMDGPU::S_XOR_B64:
2016 splitScalar64BitBinaryOp(Worklist, Inst, AMDGPU::S_XOR_B32);
2017 Inst->eraseFromParent();
2020 case AMDGPU::S_NOT_B64:
2021 splitScalar64BitUnaryOp(Worklist, Inst, AMDGPU::S_NOT_B32);
2022 Inst->eraseFromParent();
2025 case AMDGPU::S_BCNT1_I32_B64:
2026 splitScalar64BitBCNT(Worklist, Inst);
2027 Inst->eraseFromParent();
2030 case AMDGPU::S_BFE_I64: {
2031 splitScalar64BitBFE(Worklist, Inst);
2032 Inst->eraseFromParent();
2036 case AMDGPU::S_LSHL_B32:
2037 if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
2038 NewOpcode = AMDGPU::V_LSHLREV_B32_e64;
2042 case AMDGPU::S_ASHR_I32:
2043 if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
2044 NewOpcode = AMDGPU::V_ASHRREV_I32_e64;
2048 case AMDGPU::S_LSHR_B32:
2049 if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
2050 NewOpcode = AMDGPU::V_LSHRREV_B32_e64;
2055 case AMDGPU::S_BFE_U64:
2056 case AMDGPU::S_BFM_B64:
2057 llvm_unreachable("Moving this op to VALU not implemented");
2060 if (NewOpcode == AMDGPU::INSTRUCTION_LIST_END) {
2061 // We cannot move this instruction to the VALU, so we should try to
2062 // legalize its operands instead.
2063 legalizeOperands(Inst);
2067 // Use the new VALU Opcode.
2068 const MCInstrDesc &NewDesc = get(NewOpcode);
2069 Inst->setDesc(NewDesc);
2071 // Remove any references to SCC. Vector instructions can't read from it, and
2072 // We're just about to add the implicit use / defs of VCC, and we don't want
2074 for (unsigned i = Inst->getNumOperands() - 1; i > 0; --i) {
2075 MachineOperand &Op = Inst->getOperand(i);
2076 if (Op.isReg() && Op.getReg() == AMDGPU::SCC)
2077 Inst->RemoveOperand(i);
2080 if (Opcode == AMDGPU::S_SEXT_I32_I8 || Opcode == AMDGPU::S_SEXT_I32_I16) {
2081 // We are converting these to a BFE, so we need to add the missing
2082 // operands for the size and offset.
2083 unsigned Size = (Opcode == AMDGPU::S_SEXT_I32_I8) ? 8 : 16;
2084 Inst->addOperand(MachineOperand::CreateImm(0));
2085 Inst->addOperand(MachineOperand::CreateImm(Size));
2087 } else if (Opcode == AMDGPU::S_BCNT1_I32_B32) {
2088 // The VALU version adds the second operand to the result, so insert an
2090 Inst->addOperand(MachineOperand::CreateImm(0));
2093 addDescImplicitUseDef(NewDesc, Inst);
2095 if (Opcode == AMDGPU::S_BFE_I32 || Opcode == AMDGPU::S_BFE_U32) {
2096 const MachineOperand &OffsetWidthOp = Inst->getOperand(2);
2097 // If we need to move this to VGPRs, we need to unpack the second operand
2098 // back into the 2 separate ones for bit offset and width.
2099 assert(OffsetWidthOp.isImm() &&
2100 "Scalar BFE is only implemented for constant width and offset");
2101 uint32_t Imm = OffsetWidthOp.getImm();
2103 uint32_t Offset = Imm & 0x3f; // Extract bits [5:0].
2104 uint32_t BitWidth = (Imm & 0x7f0000) >> 16; // Extract bits [22:16].
2105 Inst->RemoveOperand(2); // Remove old immediate.
2106 Inst->addOperand(MachineOperand::CreateImm(Offset));
2107 Inst->addOperand(MachineOperand::CreateImm(BitWidth));
2110 // Update the destination register class.
2112 const TargetRegisterClass *NewDstRC = getOpRegClass(*Inst, 0);
2115 // For target instructions, getOpRegClass just returns the virtual
2116 // register class associated with the operand, so we need to find an
2117 // equivalent VGPR register class in order to move the instruction to the
2121 case AMDGPU::REG_SEQUENCE:
2122 case AMDGPU::INSERT_SUBREG:
2123 if (RI.hasVGPRs(NewDstRC))
2125 NewDstRC = RI.getEquivalentVGPRClass(NewDstRC);
2133 unsigned DstReg = Inst->getOperand(0).getReg();
2134 unsigned NewDstReg = MRI.createVirtualRegister(NewDstRC);
2135 MRI.replaceRegWith(DstReg, NewDstReg);
2137 // Legalize the operands
2138 legalizeOperands(Inst);
2140 for (MachineRegisterInfo::use_iterator I = MRI.use_begin(NewDstReg),
2141 E = MRI.use_end(); I != E; ++I) {
2142 MachineInstr &UseMI = *I->getParent();
2143 if (!canReadVGPR(UseMI, I.getOperandNo())) {
2144 Worklist.push_back(&UseMI);
2150 //===----------------------------------------------------------------------===//
2151 // Indirect addressing callbacks
2152 //===----------------------------------------------------------------------===//
2154 unsigned SIInstrInfo::calculateIndirectAddress(unsigned RegIndex,
2155 unsigned Channel) const {
2156 assert(Channel == 0);
2160 const TargetRegisterClass *SIInstrInfo::getIndirectAddrRegClass() const {
2161 return &AMDGPU::VGPR_32RegClass;
2164 void SIInstrInfo::splitScalar64BitUnaryOp(
2165 SmallVectorImpl<MachineInstr *> &Worklist,
2167 unsigned Opcode) const {
2168 MachineBasicBlock &MBB = *Inst->getParent();
2169 MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
2171 MachineOperand &Dest = Inst->getOperand(0);
2172 MachineOperand &Src0 = Inst->getOperand(1);
2173 DebugLoc DL = Inst->getDebugLoc();
2175 MachineBasicBlock::iterator MII = Inst;
2177 const MCInstrDesc &InstDesc = get(Opcode);
2178 const TargetRegisterClass *Src0RC = Src0.isReg() ?
2179 MRI.getRegClass(Src0.getReg()) :
2180 &AMDGPU::SGPR_32RegClass;
2182 const TargetRegisterClass *Src0SubRC = RI.getSubRegClass(Src0RC, AMDGPU::sub0);
2184 MachineOperand SrcReg0Sub0 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
2185 AMDGPU::sub0, Src0SubRC);
2187 const TargetRegisterClass *DestRC = MRI.getRegClass(Dest.getReg());
2188 const TargetRegisterClass *DestSubRC = RI.getSubRegClass(DestRC, AMDGPU::sub0);
2190 unsigned DestSub0 = MRI.createVirtualRegister(DestRC);
2191 MachineInstr *LoHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub0)
2192 .addOperand(SrcReg0Sub0);
2194 MachineOperand SrcReg0Sub1 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
2195 AMDGPU::sub1, Src0SubRC);
2197 unsigned DestSub1 = MRI.createVirtualRegister(DestSubRC);
2198 MachineInstr *HiHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub1)
2199 .addOperand(SrcReg0Sub1);
2201 unsigned FullDestReg = MRI.createVirtualRegister(DestRC);
2202 BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), FullDestReg)
2204 .addImm(AMDGPU::sub0)
2206 .addImm(AMDGPU::sub1);
2208 MRI.replaceRegWith(Dest.getReg(), FullDestReg);
2210 // Try to legalize the operands in case we need to swap the order to keep it
2212 Worklist.push_back(LoHalf);
2213 Worklist.push_back(HiHalf);
2216 void SIInstrInfo::splitScalar64BitBinaryOp(
2217 SmallVectorImpl<MachineInstr *> &Worklist,
2219 unsigned Opcode) const {
2220 MachineBasicBlock &MBB = *Inst->getParent();
2221 MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
2223 MachineOperand &Dest = Inst->getOperand(0);
2224 MachineOperand &Src0 = Inst->getOperand(1);
2225 MachineOperand &Src1 = Inst->getOperand(2);
2226 DebugLoc DL = Inst->getDebugLoc();
2228 MachineBasicBlock::iterator MII = Inst;
2230 const MCInstrDesc &InstDesc = get(Opcode);
2231 const TargetRegisterClass *Src0RC = Src0.isReg() ?
2232 MRI.getRegClass(Src0.getReg()) :
2233 &AMDGPU::SGPR_32RegClass;
2235 const TargetRegisterClass *Src0SubRC = RI.getSubRegClass(Src0RC, AMDGPU::sub0);
2236 const TargetRegisterClass *Src1RC = Src1.isReg() ?
2237 MRI.getRegClass(Src1.getReg()) :
2238 &AMDGPU::SGPR_32RegClass;
2240 const TargetRegisterClass *Src1SubRC = RI.getSubRegClass(Src1RC, AMDGPU::sub0);
2242 MachineOperand SrcReg0Sub0 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
2243 AMDGPU::sub0, Src0SubRC);
2244 MachineOperand SrcReg1Sub0 = buildExtractSubRegOrImm(MII, MRI, Src1, Src1RC,
2245 AMDGPU::sub0, Src1SubRC);
2247 const TargetRegisterClass *DestRC = MRI.getRegClass(Dest.getReg());
2248 const TargetRegisterClass *DestSubRC = RI.getSubRegClass(DestRC, AMDGPU::sub0);
2250 unsigned DestSub0 = MRI.createVirtualRegister(DestRC);
2251 MachineInstr *LoHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub0)
2252 .addOperand(SrcReg0Sub0)
2253 .addOperand(SrcReg1Sub0);
2255 MachineOperand SrcReg0Sub1 = buildExtractSubRegOrImm(MII, MRI, Src0, Src0RC,
2256 AMDGPU::sub1, Src0SubRC);
2257 MachineOperand SrcReg1Sub1 = buildExtractSubRegOrImm(MII, MRI, Src1, Src1RC,
2258 AMDGPU::sub1, Src1SubRC);
2260 unsigned DestSub1 = MRI.createVirtualRegister(DestSubRC);
2261 MachineInstr *HiHalf = BuildMI(MBB, MII, DL, InstDesc, DestSub1)
2262 .addOperand(SrcReg0Sub1)
2263 .addOperand(SrcReg1Sub1);
2265 unsigned FullDestReg = MRI.createVirtualRegister(DestRC);
2266 BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), FullDestReg)
2268 .addImm(AMDGPU::sub0)
2270 .addImm(AMDGPU::sub1);
2272 MRI.replaceRegWith(Dest.getReg(), FullDestReg);
2274 // Try to legalize the operands in case we need to swap the order to keep it
2276 Worklist.push_back(LoHalf);
2277 Worklist.push_back(HiHalf);
2280 void SIInstrInfo::splitScalar64BitBCNT(SmallVectorImpl<MachineInstr *> &Worklist,
2281 MachineInstr *Inst) const {
2282 MachineBasicBlock &MBB = *Inst->getParent();
2283 MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
2285 MachineBasicBlock::iterator MII = Inst;
2286 DebugLoc DL = Inst->getDebugLoc();
2288 MachineOperand &Dest = Inst->getOperand(0);
2289 MachineOperand &Src = Inst->getOperand(1);
2291 const MCInstrDesc &InstDesc = get(AMDGPU::V_BCNT_U32_B32_e64);
2292 const TargetRegisterClass *SrcRC = Src.isReg() ?
2293 MRI.getRegClass(Src.getReg()) :
2294 &AMDGPU::SGPR_32RegClass;
2296 unsigned MidReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
2297 unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
2299 const TargetRegisterClass *SrcSubRC = RI.getSubRegClass(SrcRC, AMDGPU::sub0);
2301 MachineOperand SrcRegSub0 = buildExtractSubRegOrImm(MII, MRI, Src, SrcRC,
2302 AMDGPU::sub0, SrcSubRC);
2303 MachineOperand SrcRegSub1 = buildExtractSubRegOrImm(MII, MRI, Src, SrcRC,
2304 AMDGPU::sub1, SrcSubRC);
2306 MachineInstr *First = BuildMI(MBB, MII, DL, InstDesc, MidReg)
2307 .addOperand(SrcRegSub0)
2310 MachineInstr *Second = BuildMI(MBB, MII, DL, InstDesc, ResultReg)
2311 .addOperand(SrcRegSub1)
2314 MRI.replaceRegWith(Dest.getReg(), ResultReg);
2316 Worklist.push_back(First);
2317 Worklist.push_back(Second);
2320 void SIInstrInfo::splitScalar64BitBFE(SmallVectorImpl<MachineInstr *> &Worklist,
2321 MachineInstr *Inst) const {
2322 MachineBasicBlock &MBB = *Inst->getParent();
2323 MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
2324 MachineBasicBlock::iterator MII = Inst;
2325 DebugLoc DL = Inst->getDebugLoc();
2327 MachineOperand &Dest = Inst->getOperand(0);
2328 uint32_t Imm = Inst->getOperand(2).getImm();
2329 uint32_t Offset = Imm & 0x3f; // Extract bits [5:0].
2330 uint32_t BitWidth = (Imm & 0x7f0000) >> 16; // Extract bits [22:16].
2334 // Only sext_inreg cases handled.
2335 assert(Inst->getOpcode() == AMDGPU::S_BFE_I64 &&
2340 if (BitWidth < 32) {
2341 unsigned MidRegLo = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
2342 unsigned MidRegHi = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
2343 unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
2345 BuildMI(MBB, MII, DL, get(AMDGPU::V_BFE_I32), MidRegLo)
2346 .addReg(Inst->getOperand(1).getReg(), 0, AMDGPU::sub0)
2350 BuildMI(MBB, MII, DL, get(AMDGPU::V_ASHRREV_I32_e32), MidRegHi)
2354 BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), ResultReg)
2356 .addImm(AMDGPU::sub0)
2358 .addImm(AMDGPU::sub1);
2360 MRI.replaceRegWith(Dest.getReg(), ResultReg);
2364 MachineOperand &Src = Inst->getOperand(1);
2365 unsigned TmpReg = MRI.createVirtualRegister(&AMDGPU::VGPR_32RegClass);
2366 unsigned ResultReg = MRI.createVirtualRegister(&AMDGPU::VReg_64RegClass);
2368 BuildMI(MBB, MII, DL, get(AMDGPU::V_ASHRREV_I32_e64), TmpReg)
2370 .addReg(Src.getReg(), 0, AMDGPU::sub0);
2372 BuildMI(MBB, MII, DL, get(TargetOpcode::REG_SEQUENCE), ResultReg)
2373 .addReg(Src.getReg(), 0, AMDGPU::sub0)
2374 .addImm(AMDGPU::sub0)
2376 .addImm(AMDGPU::sub1);
2378 MRI.replaceRegWith(Dest.getReg(), ResultReg);
2381 void SIInstrInfo::addDescImplicitUseDef(const MCInstrDesc &NewDesc,
2382 MachineInstr *Inst) const {
2383 // Add the implict and explicit register definitions.
2384 if (NewDesc.ImplicitUses) {
2385 for (unsigned i = 0; NewDesc.ImplicitUses[i]; ++i) {
2386 unsigned Reg = NewDesc.ImplicitUses[i];
2387 Inst->addOperand(MachineOperand::CreateReg(Reg, false, true));
2391 if (NewDesc.ImplicitDefs) {
2392 for (unsigned i = 0; NewDesc.ImplicitDefs[i]; ++i) {
2393 unsigned Reg = NewDesc.ImplicitDefs[i];
2394 Inst->addOperand(MachineOperand::CreateReg(Reg, true, true));
2399 unsigned SIInstrInfo::findUsedSGPR(const MachineInstr *MI,
2400 int OpIndices[3]) const {
2401 const MCInstrDesc &Desc = get(MI->getOpcode());
2403 // Find the one SGPR operand we are allowed to use.
2404 unsigned SGPRReg = AMDGPU::NoRegister;
2406 // First we need to consider the instruction's operand requirements before
2407 // legalizing. Some operands are required to be SGPRs, such as implicit uses
2408 // of VCC, but we are still bound by the constant bus requirement to only use
2411 // If the operand's class is an SGPR, we can never move it.
2413 for (const MachineOperand &MO : MI->implicit_operands()) {
2414 // We only care about reads.
2418 if (MO.getReg() == AMDGPU::VCC)
2421 if (MO.getReg() == AMDGPU::FLAT_SCR)
2422 return AMDGPU::FLAT_SCR;
2425 unsigned UsedSGPRs[3] = { AMDGPU::NoRegister };
2426 const MachineRegisterInfo &MRI = MI->getParent()->getParent()->getRegInfo();
2428 for (unsigned i = 0; i < 3; ++i) {
2429 int Idx = OpIndices[i];
2433 const MachineOperand &MO = MI->getOperand(Idx);
2434 if (RI.isSGPRClassID(Desc.OpInfo[Idx].RegClass))
2435 SGPRReg = MO.getReg();
2437 if (MO.isReg() && RI.isSGPRClass(MRI.getRegClass(MO.getReg())))
2438 UsedSGPRs[i] = MO.getReg();
2441 if (SGPRReg != AMDGPU::NoRegister)
2444 // We don't have a required SGPR operand, so we have a bit more freedom in
2445 // selecting operands to move.
2447 // Try to select the most used SGPR. If an SGPR is equal to one of the
2448 // others, we choose that.
2451 // V_FMA_F32 v0, s0, s0, s0 -> No moves
2452 // V_FMA_F32 v0, s0, s1, s0 -> Move s1
2454 if (UsedSGPRs[0] != AMDGPU::NoRegister) {
2455 if (UsedSGPRs[0] == UsedSGPRs[1] || UsedSGPRs[0] == UsedSGPRs[2])
2456 SGPRReg = UsedSGPRs[0];
2459 if (SGPRReg == AMDGPU::NoRegister && UsedSGPRs[1] != AMDGPU::NoRegister) {
2460 if (UsedSGPRs[1] == UsedSGPRs[2])
2461 SGPRReg = UsedSGPRs[1];
2467 MachineInstrBuilder SIInstrInfo::buildIndirectWrite(
2468 MachineBasicBlock *MBB,
2469 MachineBasicBlock::iterator I,
2471 unsigned Address, unsigned OffsetReg) const {
2472 const DebugLoc &DL = MBB->findDebugLoc(I);
2473 unsigned IndirectBaseReg = AMDGPU::VGPR_32RegClass.getRegister(
2474 getIndirectIndexBegin(*MBB->getParent()));
2476 return BuildMI(*MBB, I, DL, get(AMDGPU::SI_INDIRECT_DST_V1))
2477 .addReg(IndirectBaseReg, RegState::Define)
2478 .addOperand(I->getOperand(0))
2479 .addReg(IndirectBaseReg)
2485 MachineInstrBuilder SIInstrInfo::buildIndirectRead(
2486 MachineBasicBlock *MBB,
2487 MachineBasicBlock::iterator I,
2489 unsigned Address, unsigned OffsetReg) const {
2490 const DebugLoc &DL = MBB->findDebugLoc(I);
2491 unsigned IndirectBaseReg = AMDGPU::VGPR_32RegClass.getRegister(
2492 getIndirectIndexBegin(*MBB->getParent()));
2494 return BuildMI(*MBB, I, DL, get(AMDGPU::SI_INDIRECT_SRC))
2495 .addOperand(I->getOperand(0))
2496 .addOperand(I->getOperand(1))
2497 .addReg(IndirectBaseReg)
2503 void SIInstrInfo::reserveIndirectRegisters(BitVector &Reserved,
2504 const MachineFunction &MF) const {
2505 int End = getIndirectIndexEnd(MF);
2506 int Begin = getIndirectIndexBegin(MF);
2512 for (int Index = Begin; Index <= End; ++Index)
2513 Reserved.set(AMDGPU::VGPR_32RegClass.getRegister(Index));
2515 for (int Index = std::max(0, Begin - 1); Index <= End; ++Index)
2516 Reserved.set(AMDGPU::VReg_64RegClass.getRegister(Index));
2518 for (int Index = std::max(0, Begin - 2); Index <= End; ++Index)
2519 Reserved.set(AMDGPU::VReg_96RegClass.getRegister(Index));
2521 for (int Index = std::max(0, Begin - 3); Index <= End; ++Index)
2522 Reserved.set(AMDGPU::VReg_128RegClass.getRegister(Index));
2524 for (int Index = std::max(0, Begin - 7); Index <= End; ++Index)
2525 Reserved.set(AMDGPU::VReg_256RegClass.getRegister(Index));
2527 for (int Index = std::max(0, Begin - 15); Index <= End; ++Index)
2528 Reserved.set(AMDGPU::VReg_512RegClass.getRegister(Index));
2531 MachineOperand *SIInstrInfo::getNamedOperand(MachineInstr &MI,
2532 unsigned OperandName) const {
2533 int Idx = AMDGPU::getNamedOperandIdx(MI.getOpcode(), OperandName);
2537 return &MI.getOperand(Idx);
2540 uint64_t SIInstrInfo::getDefaultRsrcDataFormat() const {
2541 uint64_t RsrcDataFormat = AMDGPU::RSRC_DATA_FORMAT;
2542 if (ST.isAmdHsaOS())
2543 RsrcDataFormat |= (1ULL << 56);
2545 return RsrcDataFormat;