1 //===-- MipsSEInstrInfo.cpp - Mips32/64 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 //===----------------------------------------------------------------------===//
10 // This file contains the Mips32/64 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "MipsSEInstrInfo.h"
15 #include "InstPrinter/MipsInstPrinter.h"
16 #include "MipsMachineFunction.h"
17 #include "MipsTargetMachine.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/CodeGen/MachineInstrBuilder.h"
20 #include "llvm/CodeGen/MachineRegisterInfo.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/TargetRegistry.h"
27 MipsSEInstrInfo::MipsSEInstrInfo(MipsTargetMachine &tm)
29 tm.getRelocationModel() == Reloc::PIC_ ? Mips::B : Mips::J),
30 RI(*tm.getSubtargetImpl()),
31 IsN64(tm.getSubtarget<MipsSubtarget>().isABI_N64()) {}
33 const MipsRegisterInfo &MipsSEInstrInfo::getRegisterInfo() const {
37 /// isLoadFromStackSlot - If the specified machine instruction is a direct
38 /// load from a stack slot, return the virtual or physical register number of
39 /// the destination along with the FrameIndex of the loaded stack slot. If
40 /// not, return 0. This predicate must return 0 if the instruction has
41 /// any side effects other than loading from the stack slot.
42 unsigned MipsSEInstrInfo::
43 isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const
45 unsigned Opc = MI->getOpcode();
47 if ((Opc == Mips::LW) || (Opc == Mips::LD) ||
48 (Opc == Mips::LWC1) || (Opc == Mips::LDC1) || (Opc == Mips::LDC164)) {
49 if ((MI->getOperand(1).isFI()) && // is a stack slot
50 (MI->getOperand(2).isImm()) && // the imm is zero
51 (isZeroImm(MI->getOperand(2)))) {
52 FrameIndex = MI->getOperand(1).getIndex();
53 return MI->getOperand(0).getReg();
60 /// isStoreToStackSlot - If the specified machine instruction is a direct
61 /// store to a stack slot, return the virtual or physical register number of
62 /// the source reg along with the FrameIndex of the loaded stack slot. If
63 /// not, return 0. This predicate must return 0 if the instruction has
64 /// any side effects other than storing to the stack slot.
65 unsigned MipsSEInstrInfo::
66 isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const
68 unsigned Opc = MI->getOpcode();
70 if ((Opc == Mips::SW) || (Opc == Mips::SD) ||
71 (Opc == Mips::SWC1) || (Opc == Mips::SDC1) || (Opc == Mips::SDC164)) {
72 if ((MI->getOperand(1).isFI()) && // is a stack slot
73 (MI->getOperand(2).isImm()) && // the imm is zero
74 (isZeroImm(MI->getOperand(2)))) {
75 FrameIndex = MI->getOperand(1).getIndex();
76 return MI->getOperand(0).getReg();
82 void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
83 MachineBasicBlock::iterator I, DebugLoc DL,
84 unsigned DestReg, unsigned SrcReg,
86 unsigned Opc = 0, ZeroReg = 0;
88 if (Mips::GPR32RegClass.contains(DestReg)) { // Copy to CPU Reg.
89 if (Mips::GPR32RegClass.contains(SrcReg))
90 Opc = Mips::ADDu, ZeroReg = Mips::ZERO;
91 else if (Mips::CCRRegClass.contains(SrcReg))
93 else if (Mips::FGR32RegClass.contains(SrcReg))
95 else if (Mips::HI32RegClass.contains(SrcReg))
96 Opc = Mips::MFHI, SrcReg = 0;
97 else if (Mips::LO32RegClass.contains(SrcReg))
98 Opc = Mips::MFLO, SrcReg = 0;
99 else if (Mips::HI32DSPRegClass.contains(SrcReg))
100 Opc = Mips::MFHI_DSP;
101 else if (Mips::LO32DSPRegClass.contains(SrcReg))
102 Opc = Mips::MFLO_DSP;
103 else if (Mips::DSPCCRegClass.contains(SrcReg)) {
104 BuildMI(MBB, I, DL, get(Mips::RDDSP), DestReg).addImm(1 << 4)
105 .addReg(SrcReg, RegState::Implicit | getKillRegState(KillSrc));
108 else if (Mips::MSACtrlRegClass.contains(SrcReg))
111 else if (Mips::GPR32RegClass.contains(SrcReg)) { // Copy from CPU Reg.
112 if (Mips::CCRRegClass.contains(DestReg))
114 else if (Mips::FGR32RegClass.contains(DestReg))
116 else if (Mips::HI32RegClass.contains(DestReg))
117 Opc = Mips::MTHI, DestReg = 0;
118 else if (Mips::LO32RegClass.contains(DestReg))
119 Opc = Mips::MTLO, DestReg = 0;
120 else if (Mips::HI32DSPRegClass.contains(DestReg))
121 Opc = Mips::MTHI_DSP;
122 else if (Mips::LO32DSPRegClass.contains(DestReg))
123 Opc = Mips::MTLO_DSP;
124 else if (Mips::DSPCCRegClass.contains(DestReg)) {
125 BuildMI(MBB, I, DL, get(Mips::WRDSP))
126 .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
127 .addReg(DestReg, RegState::ImplicitDefine);
130 else if (Mips::MSACtrlRegClass.contains(DestReg))
133 else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
135 else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg))
136 Opc = Mips::FMOV_D32;
137 else if (Mips::FGR64RegClass.contains(DestReg, SrcReg))
138 Opc = Mips::FMOV_D64;
139 else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.
140 if (Mips::GPR64RegClass.contains(SrcReg))
141 Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64;
142 else if (Mips::HI64RegClass.contains(SrcReg))
143 Opc = Mips::MFHI64, SrcReg = 0;
144 else if (Mips::LO64RegClass.contains(SrcReg))
145 Opc = Mips::MFLO64, SrcReg = 0;
146 else if (Mips::FGR64RegClass.contains(SrcReg))
149 else if (Mips::GPR64RegClass.contains(SrcReg)) { // Copy from CPU64 Reg.
150 if (Mips::HI64RegClass.contains(DestReg))
151 Opc = Mips::MTHI64, DestReg = 0;
152 else if (Mips::LO64RegClass.contains(DestReg))
153 Opc = Mips::MTLO64, DestReg = 0;
154 else if (Mips::FGR64RegClass.contains(DestReg))
158 assert(Opc && "Cannot copy registers");
160 MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opc));
163 MIB.addReg(DestReg, RegState::Define);
166 MIB.addReg(SrcReg, getKillRegState(KillSrc));
172 void MipsSEInstrInfo::
173 storeRegToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
174 unsigned SrcReg, bool isKill, int FI,
175 const TargetRegisterClass *RC, const TargetRegisterInfo *TRI,
176 int64_t Offset) const {
178 if (I != MBB.end()) DL = I->getDebugLoc();
179 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOStore);
183 if (Mips::GPR32RegClass.hasSubClassEq(RC))
185 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
187 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
188 Opc = Mips::STORE_ACC64;
189 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
190 Opc = Mips::STORE_ACC64DSP;
191 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
192 Opc = Mips::STORE_ACC128;
193 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
194 Opc = Mips::STORE_CCOND_DSP;
195 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
197 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
199 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
201 else if (RC->hasType(MVT::v16i8))
203 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
205 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
207 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
210 assert(Opc && "Register class not handled!");
211 BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill))
212 .addFrameIndex(FI).addImm(Offset).addMemOperand(MMO);
215 void MipsSEInstrInfo::
216 loadRegFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
217 unsigned DestReg, int FI, const TargetRegisterClass *RC,
218 const TargetRegisterInfo *TRI, int64_t Offset) const {
220 if (I != MBB.end()) DL = I->getDebugLoc();
221 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad);
224 if (Mips::GPR32RegClass.hasSubClassEq(RC))
226 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
228 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
229 Opc = Mips::LOAD_ACC64;
230 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
231 Opc = Mips::LOAD_ACC64DSP;
232 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
233 Opc = Mips::LOAD_ACC128;
234 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
235 Opc = Mips::LOAD_CCOND_DSP;
236 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
238 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
240 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
242 else if (RC->hasType(MVT::v16i8))
244 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
246 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
248 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
251 assert(Opc && "Register class not handled!");
252 BuildMI(MBB, I, DL, get(Opc), DestReg).addFrameIndex(FI).addImm(Offset)
256 bool MipsSEInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
257 MachineBasicBlock &MBB = *MI->getParent();
259 switch(MI->getDesc().getOpcode()) {
263 expandRetRA(MBB, MI, Mips::RET);
265 case Mips::PseudoCVT_S_W:
266 expandCvtFPInt(MBB, MI, Mips::CVT_S_W, Mips::MTC1, false);
268 case Mips::PseudoCVT_D32_W:
269 expandCvtFPInt(MBB, MI, Mips::CVT_D32_W, Mips::MTC1, false);
271 case Mips::PseudoCVT_S_L:
272 expandCvtFPInt(MBB, MI, Mips::CVT_S_L, Mips::DMTC1, true);
274 case Mips::PseudoCVT_D64_W:
275 expandCvtFPInt(MBB, MI, Mips::CVT_D64_W, Mips::MTC1, true);
277 case Mips::PseudoCVT_D64_L:
278 expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true);
280 case Mips::BuildPairF64:
281 expandBuildPairF64(MBB, MI, false);
283 case Mips::BuildPairF64_64:
284 expandBuildPairF64(MBB, MI, true);
286 case Mips::ExtractElementF64:
287 expandExtractElementF64(MBB, MI, false);
289 case Mips::ExtractElementF64_64:
290 expandExtractElementF64(MBB, MI, true);
292 case Mips::MIPSeh_return32:
293 case Mips::MIPSeh_return64:
294 expandEhReturn(MBB, MI);
302 /// getOppositeBranchOpc - Return the inverse of the specified
303 /// opcode, e.g. turning BEQ to BNE.
304 unsigned MipsSEInstrInfo::getOppositeBranchOpc(unsigned Opc) const {
306 default: llvm_unreachable("Illegal opcode!");
307 case Mips::BEQ: return Mips::BNE;
308 case Mips::BNE: return Mips::BEQ;
309 case Mips::BGTZ: return Mips::BLEZ;
310 case Mips::BGEZ: return Mips::BLTZ;
311 case Mips::BLTZ: return Mips::BGEZ;
312 case Mips::BLEZ: return Mips::BGTZ;
313 case Mips::BEQ64: return Mips::BNE64;
314 case Mips::BNE64: return Mips::BEQ64;
315 case Mips::BGTZ64: return Mips::BLEZ64;
316 case Mips::BGEZ64: return Mips::BLTZ64;
317 case Mips::BLTZ64: return Mips::BGEZ64;
318 case Mips::BLEZ64: return Mips::BGTZ64;
319 case Mips::BC1T: return Mips::BC1F;
320 case Mips::BC1F: return Mips::BC1T;
324 /// Adjust SP by Amount bytes.
325 void MipsSEInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
326 MachineBasicBlock &MBB,
327 MachineBasicBlock::iterator I) const {
328 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
329 DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
330 unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
331 unsigned ADDiu = STI.isABI_N64() ? Mips::DADDiu : Mips::ADDiu;
333 if (isInt<16>(Amount))// addi sp, sp, amount
334 BuildMI(MBB, I, DL, get(ADDiu), SP).addReg(SP).addImm(Amount);
335 else { // Expand immediate that doesn't fit in 16-bit.
336 unsigned Reg = loadImmediate(Amount, MBB, I, DL, 0);
337 BuildMI(MBB, I, DL, get(ADDu), SP).addReg(SP).addReg(Reg, RegState::Kill);
341 /// This function generates the sequence of instructions needed to get the
342 /// result of adding register REG and immediate IMM.
344 MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
345 MachineBasicBlock::iterator II, DebugLoc DL,
346 unsigned *NewImm) const {
347 MipsAnalyzeImmediate AnalyzeImm;
348 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
349 MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
350 unsigned Size = STI.isABI_N64() ? 64 : 32;
351 unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
352 unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
353 const TargetRegisterClass *RC = STI.isABI_N64() ?
354 &Mips::GPR64RegClass : &Mips::GPR32RegClass;
355 bool LastInstrIsADDiu = NewImm;
357 const MipsAnalyzeImmediate::InstSeq &Seq =
358 AnalyzeImm.Analyze(Imm, Size, LastInstrIsADDiu);
359 MipsAnalyzeImmediate::InstSeq::const_iterator Inst = Seq.begin();
361 assert(Seq.size() && (!LastInstrIsADDiu || (Seq.size() > 1)));
363 // The first instruction can be a LUi, which is different from other
364 // instructions (ADDiu, ORI and SLL) in that it does not have a register
366 unsigned Reg = RegInfo.createVirtualRegister(RC);
368 if (Inst->Opc == LUi)
369 BuildMI(MBB, II, DL, get(LUi), Reg).addImm(SignExtend64<16>(Inst->ImmOpnd));
371 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(ZEROReg)
372 .addImm(SignExtend64<16>(Inst->ImmOpnd));
374 // Build the remaining instructions in Seq.
375 for (++Inst; Inst != Seq.end() - LastInstrIsADDiu; ++Inst)
376 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(Reg, RegState::Kill)
377 .addImm(SignExtend64<16>(Inst->ImmOpnd));
379 if (LastInstrIsADDiu)
380 *NewImm = Inst->ImmOpnd;
385 unsigned MipsSEInstrInfo::getAnalyzableBrOpc(unsigned Opc) const {
386 return (Opc == Mips::BEQ || Opc == Mips::BNE || Opc == Mips::BGTZ ||
387 Opc == Mips::BGEZ || Opc == Mips::BLTZ || Opc == Mips::BLEZ ||
388 Opc == Mips::BEQ64 || Opc == Mips::BNE64 || Opc == Mips::BGTZ64 ||
389 Opc == Mips::BGEZ64 || Opc == Mips::BLTZ64 || Opc == Mips::BLEZ64 ||
390 Opc == Mips::BC1T || Opc == Mips::BC1F || Opc == Mips::B ||
395 void MipsSEInstrInfo::expandRetRA(MachineBasicBlock &MBB,
396 MachineBasicBlock::iterator I,
397 unsigned Opc) const {
398 BuildMI(MBB, I, I->getDebugLoc(), get(Opc)).addReg(Mips::RA);
401 std::pair<bool, bool>
402 MipsSEInstrInfo::compareOpndSize(unsigned Opc,
403 const MachineFunction &MF) const {
404 const MCInstrDesc &Desc = get(Opc);
405 assert(Desc.NumOperands == 2 && "Unary instruction expected.");
406 const MipsRegisterInfo *RI = &getRegisterInfo();
407 unsigned DstRegSize = getRegClass(Desc, 0, RI, MF)->getSize();
408 unsigned SrcRegSize = getRegClass(Desc, 1, RI, MF)->getSize();
410 return std::make_pair(DstRegSize > SrcRegSize, DstRegSize < SrcRegSize);
413 void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB,
414 MachineBasicBlock::iterator I,
415 unsigned CvtOpc, unsigned MovOpc,
417 const MCInstrDesc &CvtDesc = get(CvtOpc), &MovDesc = get(MovOpc);
418 const MachineOperand &Dst = I->getOperand(0), &Src = I->getOperand(1);
419 unsigned DstReg = Dst.getReg(), SrcReg = Src.getReg(), TmpReg = DstReg;
420 unsigned KillSrc = getKillRegState(Src.isKill());
421 DebugLoc DL = I->getDebugLoc();
422 bool DstIsLarger, SrcIsLarger;
424 tie(DstIsLarger, SrcIsLarger) = compareOpndSize(CvtOpc, *MBB.getParent());
427 TmpReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
430 DstReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
432 BuildMI(MBB, I, DL, MovDesc, TmpReg).addReg(SrcReg, KillSrc);
433 BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill);
436 void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB,
437 MachineBasicBlock::iterator I,
439 unsigned DstReg = I->getOperand(0).getReg();
440 unsigned SrcReg = I->getOperand(1).getReg();
441 unsigned N = I->getOperand(2).getImm();
442 DebugLoc dl = I->getDebugLoc();
444 assert(N < 2 && "Invalid immediate");
445 unsigned SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
446 unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
448 if (SubIdx == Mips::sub_hi && FP64)
449 BuildMI(MBB, I, dl, get(Mips::MFHC1), DstReg).addReg(SubReg);
451 BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
454 void MipsSEInstrInfo::expandBuildPairF64(MachineBasicBlock &MBB,
455 MachineBasicBlock::iterator I,
457 unsigned DstReg = I->getOperand(0).getReg();
458 unsigned LoReg = I->getOperand(1).getReg(), HiReg = I->getOperand(2).getReg();
459 const MCInstrDesc& Mtc1Tdd = get(Mips::MTC1);
460 DebugLoc dl = I->getDebugLoc();
461 const TargetRegisterInfo &TRI = getRegisterInfo();
465 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_lo))
469 BuildMI(MBB, I, dl, get(Mips::MTHC1), TRI.getSubReg(DstReg, Mips::sub_hi))
472 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_hi))
476 void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
477 MachineBasicBlock::iterator I) const {
478 // This pseudo instruction is generated as part of the lowering of
479 // ISD::EH_RETURN. We convert it to a stack increment by OffsetReg, and
480 // indirect jump to TargetReg
481 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
482 unsigned ADDU = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
483 unsigned JR = STI.isABI_N64() ? Mips::JR64 : Mips::JR;
484 unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
485 unsigned RA = STI.isABI_N64() ? Mips::RA_64 : Mips::RA;
486 unsigned T9 = STI.isABI_N64() ? Mips::T9_64 : Mips::T9;
487 unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
488 unsigned OffsetReg = I->getOperand(0).getReg();
489 unsigned TargetReg = I->getOperand(1).getReg();
491 // addu $ra, $v0, $zero
492 // addu $sp, $sp, $v1
494 if (TM.getRelocationModel() == Reloc::PIC_)
495 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), T9)
496 .addReg(TargetReg).addReg(ZERO);
497 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), RA)
498 .addReg(TargetReg).addReg(ZERO);
499 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), SP)
500 .addReg(SP).addReg(OffsetReg);
501 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(JR)).addReg(RA);
504 const MipsInstrInfo *llvm::createMipsSEInstrInfo(MipsTargetMachine &TM) {
505 return new MipsSEInstrInfo(TM);