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 "MipsAnalyzeImmediate.h"
17 #include "MipsMachineFunction.h"
18 #include "MipsTargetMachine.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/CodeGen/MachineInstrBuilder.h"
21 #include "llvm/CodeGen/MachineRegisterInfo.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/MathExtras.h"
24 #include "llvm/Support/TargetRegistry.h"
28 MipsSEInstrInfo::MipsSEInstrInfo(const MipsSubtarget &STI)
29 : MipsInstrInfo(STI, STI.isPositionIndependent() ? Mips::B : Mips::J),
32 const MipsRegisterInfo &MipsSEInstrInfo::getRegisterInfo() const {
36 /// isLoadFromStackSlot - If the specified machine instruction is a direct
37 /// load from a stack slot, return the virtual or physical register number of
38 /// the destination along with the FrameIndex of the loaded stack slot. If
39 /// not, return 0. This predicate must return 0 if the instruction has
40 /// any side effects other than loading from the stack slot.
41 unsigned MipsSEInstrInfo::isLoadFromStackSlot(const MachineInstr &MI,
42 int &FrameIndex) const {
43 unsigned Opc = MI.getOpcode();
45 if ((Opc == Mips::LW) || (Opc == Mips::LD) ||
46 (Opc == Mips::LWC1) || (Opc == Mips::LDC1) || (Opc == Mips::LDC164)) {
47 if ((MI.getOperand(1).isFI()) && // is a stack slot
48 (MI.getOperand(2).isImm()) && // the imm is zero
49 (isZeroImm(MI.getOperand(2)))) {
50 FrameIndex = MI.getOperand(1).getIndex();
51 return MI.getOperand(0).getReg();
58 /// isStoreToStackSlot - If the specified machine instruction is a direct
59 /// store to a stack slot, return the virtual or physical register number of
60 /// the source reg along with the FrameIndex of the loaded stack slot. If
61 /// not, return 0. This predicate must return 0 if the instruction has
62 /// any side effects other than storing to the stack slot.
63 unsigned MipsSEInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
64 int &FrameIndex) const {
65 unsigned Opc = MI.getOpcode();
67 if ((Opc == Mips::SW) || (Opc == Mips::SD) ||
68 (Opc == Mips::SWC1) || (Opc == Mips::SDC1) || (Opc == Mips::SDC164)) {
69 if ((MI.getOperand(1).isFI()) && // is a stack slot
70 (MI.getOperand(2).isImm()) && // the imm is zero
71 (isZeroImm(MI.getOperand(2)))) {
72 FrameIndex = MI.getOperand(1).getIndex();
73 return MI.getOperand(0).getReg();
79 void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
80 MachineBasicBlock::iterator I,
81 const DebugLoc &DL, unsigned DestReg,
82 unsigned SrcReg, bool KillSrc) const {
83 unsigned Opc = 0, ZeroReg = 0;
84 bool isMicroMips = Subtarget.inMicroMipsMode();
86 if (Mips::GPR32RegClass.contains(DestReg)) { // Copy to CPU Reg.
87 if (Mips::GPR32RegClass.contains(SrcReg)) {
89 Opc = Mips::MOVE16_MM;
91 Opc = Mips::OR, ZeroReg = Mips::ZERO;
92 } else if (Mips::CCRRegClass.contains(SrcReg))
94 else if (Mips::FGR32RegClass.contains(SrcReg))
96 else if (Mips::HI32RegClass.contains(SrcReg)) {
97 Opc = isMicroMips ? Mips::MFHI16_MM : Mips::MFHI;
99 } else if (Mips::LO32RegClass.contains(SrcReg)) {
100 Opc = isMicroMips ? Mips::MFLO16_MM : Mips::MFLO;
102 } else if (Mips::HI32DSPRegClass.contains(SrcReg))
103 Opc = Mips::MFHI_DSP;
104 else if (Mips::LO32DSPRegClass.contains(SrcReg))
105 Opc = Mips::MFLO_DSP;
106 else if (Mips::DSPCCRegClass.contains(SrcReg)) {
107 BuildMI(MBB, I, DL, get(Mips::RDDSP), DestReg).addImm(1 << 4)
108 .addReg(SrcReg, RegState::Implicit | getKillRegState(KillSrc));
111 else if (Mips::MSACtrlRegClass.contains(SrcReg))
114 else if (Mips::GPR32RegClass.contains(SrcReg)) { // Copy from CPU Reg.
115 if (Mips::CCRRegClass.contains(DestReg))
117 else if (Mips::FGR32RegClass.contains(DestReg))
119 else if (Mips::HI32RegClass.contains(DestReg))
120 Opc = Mips::MTHI, DestReg = 0;
121 else if (Mips::LO32RegClass.contains(DestReg))
122 Opc = Mips::MTLO, DestReg = 0;
123 else if (Mips::HI32DSPRegClass.contains(DestReg))
124 Opc = Mips::MTHI_DSP;
125 else if (Mips::LO32DSPRegClass.contains(DestReg))
126 Opc = Mips::MTLO_DSP;
127 else if (Mips::DSPCCRegClass.contains(DestReg)) {
128 BuildMI(MBB, I, DL, get(Mips::WRDSP))
129 .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
130 .addReg(DestReg, RegState::ImplicitDefine);
132 } else if (Mips::MSACtrlRegClass.contains(DestReg)) {
133 BuildMI(MBB, I, DL, get(Mips::CTCMSA))
135 .addReg(SrcReg, getKillRegState(KillSrc));
139 else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
141 else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg))
142 Opc = Mips::FMOV_D32;
143 else if (Mips::FGR64RegClass.contains(DestReg, SrcReg))
144 Opc = Mips::FMOV_D64;
145 else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.
146 if (Mips::GPR64RegClass.contains(SrcReg))
147 Opc = Mips::OR64, ZeroReg = Mips::ZERO_64;
148 else if (Mips::HI64RegClass.contains(SrcReg))
149 Opc = Mips::MFHI64, SrcReg = 0;
150 else if (Mips::LO64RegClass.contains(SrcReg))
151 Opc = Mips::MFLO64, SrcReg = 0;
152 else if (Mips::FGR64RegClass.contains(SrcReg))
155 else if (Mips::GPR64RegClass.contains(SrcReg)) { // Copy from CPU64 Reg.
156 if (Mips::HI64RegClass.contains(DestReg))
157 Opc = Mips::MTHI64, DestReg = 0;
158 else if (Mips::LO64RegClass.contains(DestReg))
159 Opc = Mips::MTLO64, DestReg = 0;
160 else if (Mips::FGR64RegClass.contains(DestReg))
163 else if (Mips::MSA128BRegClass.contains(DestReg)) { // Copy to MSA reg
164 if (Mips::MSA128BRegClass.contains(SrcReg))
168 assert(Opc && "Cannot copy registers");
170 MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opc));
173 MIB.addReg(DestReg, RegState::Define);
176 MIB.addReg(SrcReg, getKillRegState(KillSrc));
182 static bool isORCopyInst(const MachineInstr &MI) {
183 switch (MI.getOpcode()) {
188 if (MI.getOperand(2).getReg() == Mips::ZERO)
192 if (MI.getOperand(2).getReg() == Mips::ZERO_64)
199 /// If @MI is WRDSP/RRDSP instruction return true with @isWrite set to true
200 /// if it is WRDSP instruction.
201 static bool isReadOrWriteToDSPReg(const MachineInstr &MI, bool &isWrite) {
202 switch (MI.getOpcode()) {
217 /// We check for the common case of 'or', as it's MIPS' preferred instruction
218 /// for GPRs but we have to check the operands to ensure that is the case.
219 /// Other move instructions for MIPS are directly identifiable.
220 bool MipsSEInstrInfo::isCopyInstr(const MachineInstr &MI,
221 const MachineOperand *&Src,
222 const MachineOperand *&Dest) const {
223 bool isDSPControlWrite = false;
224 // Condition is made to match the creation of WRDSP/RDDSP copy instruction
225 // from copyPhysReg function.
226 if (isReadOrWriteToDSPReg(MI, isDSPControlWrite)) {
227 if (!MI.getOperand(1).isImm() || MI.getOperand(1).getImm() != (1<<4))
229 else if (isDSPControlWrite) {
230 Src = &MI.getOperand(0);
231 Dest = &MI.getOperand(2);
233 Dest = &MI.getOperand(0);
234 Src = &MI.getOperand(2);
237 } else if (MI.isMoveReg() || isORCopyInst(MI)) {
238 Dest = &MI.getOperand(0);
239 Src = &MI.getOperand(1);
245 void MipsSEInstrInfo::
246 storeRegToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
247 unsigned SrcReg, bool isKill, int FI,
248 const TargetRegisterClass *RC, const TargetRegisterInfo *TRI,
249 int64_t Offset) const {
251 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOStore);
255 if (Mips::GPR32RegClass.hasSubClassEq(RC))
257 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
259 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
260 Opc = Mips::STORE_ACC64;
261 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
262 Opc = Mips::STORE_ACC64DSP;
263 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
264 Opc = Mips::STORE_ACC128;
265 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
266 Opc = Mips::STORE_CCOND_DSP;
267 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
269 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
271 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
273 else if (TRI->isTypeLegalForClass(*RC, MVT::v16i8))
275 else if (TRI->isTypeLegalForClass(*RC, MVT::v8i16) ||
276 TRI->isTypeLegalForClass(*RC, MVT::v8f16))
278 else if (TRI->isTypeLegalForClass(*RC, MVT::v4i32) ||
279 TRI->isTypeLegalForClass(*RC, MVT::v4f32))
281 else if (TRI->isTypeLegalForClass(*RC, MVT::v2i64) ||
282 TRI->isTypeLegalForClass(*RC, MVT::v2f64))
284 else if (Mips::LO32RegClass.hasSubClassEq(RC))
286 else if (Mips::LO64RegClass.hasSubClassEq(RC))
288 else if (Mips::HI32RegClass.hasSubClassEq(RC))
290 else if (Mips::HI64RegClass.hasSubClassEq(RC))
292 else if (Mips::DSPRRegClass.hasSubClassEq(RC))
295 // Hi, Lo are normally caller save but they are callee save
296 // for interrupt handling.
297 const Function &Func = MBB.getParent()->getFunction();
298 if (Func.hasFnAttribute("interrupt")) {
299 if (Mips::HI32RegClass.hasSubClassEq(RC)) {
300 BuildMI(MBB, I, DL, get(Mips::MFHI), Mips::K0);
302 } else if (Mips::HI64RegClass.hasSubClassEq(RC)) {
303 BuildMI(MBB, I, DL, get(Mips::MFHI64), Mips::K0_64);
304 SrcReg = Mips::K0_64;
305 } else if (Mips::LO32RegClass.hasSubClassEq(RC)) {
306 BuildMI(MBB, I, DL, get(Mips::MFLO), Mips::K0);
308 } else if (Mips::LO64RegClass.hasSubClassEq(RC)) {
309 BuildMI(MBB, I, DL, get(Mips::MFLO64), Mips::K0_64);
310 SrcReg = Mips::K0_64;
314 assert(Opc && "Register class not handled!");
315 BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill))
316 .addFrameIndex(FI).addImm(Offset).addMemOperand(MMO);
319 void MipsSEInstrInfo::
320 loadRegFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
321 unsigned DestReg, int FI, const TargetRegisterClass *RC,
322 const TargetRegisterInfo *TRI, int64_t Offset) const {
324 if (I != MBB.end()) DL = I->getDebugLoc();
325 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad);
328 const Function &Func = MBB.getParent()->getFunction();
329 bool ReqIndirectLoad = Func.hasFnAttribute("interrupt") &&
330 (DestReg == Mips::LO0 || DestReg == Mips::LO0_64 ||
331 DestReg == Mips::HI0 || DestReg == Mips::HI0_64);
333 if (Mips::GPR32RegClass.hasSubClassEq(RC))
335 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
337 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
338 Opc = Mips::LOAD_ACC64;
339 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
340 Opc = Mips::LOAD_ACC64DSP;
341 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
342 Opc = Mips::LOAD_ACC128;
343 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
344 Opc = Mips::LOAD_CCOND_DSP;
345 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
347 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
349 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
351 else if (TRI->isTypeLegalForClass(*RC, MVT::v16i8))
353 else if (TRI->isTypeLegalForClass(*RC, MVT::v8i16) ||
354 TRI->isTypeLegalForClass(*RC, MVT::v8f16))
356 else if (TRI->isTypeLegalForClass(*RC, MVT::v4i32) ||
357 TRI->isTypeLegalForClass(*RC, MVT::v4f32))
359 else if (TRI->isTypeLegalForClass(*RC, MVT::v2i64) ||
360 TRI->isTypeLegalForClass(*RC, MVT::v2f64))
362 else if (Mips::HI32RegClass.hasSubClassEq(RC))
364 else if (Mips::HI64RegClass.hasSubClassEq(RC))
366 else if (Mips::LO32RegClass.hasSubClassEq(RC))
368 else if (Mips::LO64RegClass.hasSubClassEq(RC))
370 else if (Mips::DSPRRegClass.hasSubClassEq(RC))
373 assert(Opc && "Register class not handled!");
375 if (!ReqIndirectLoad)
376 BuildMI(MBB, I, DL, get(Opc), DestReg)
381 // Load HI/LO through K0. Notably the DestReg is encoded into the
382 // instruction itself.
383 unsigned Reg = Mips::K0;
384 unsigned LdOp = Mips::MTLO;
385 if (DestReg == Mips::HI0)
388 if (Subtarget.getABI().ArePtrs64bit()) {
390 if (DestReg == Mips::HI0_64)
396 BuildMI(MBB, I, DL, get(Opc), Reg)
400 BuildMI(MBB, I, DL, get(LdOp)).addReg(Reg);
404 bool MipsSEInstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
405 MachineBasicBlock &MBB = *MI.getParent();
406 bool isMicroMips = Subtarget.inMicroMipsMode();
409 switch (MI.getDesc().getOpcode()) {
413 expandRetRA(MBB, MI);
418 case Mips::PseudoMFHI:
419 Opc = isMicroMips ? Mips::MFHI16_MM : Mips::MFHI;
420 expandPseudoMFHiLo(MBB, MI, Opc);
422 case Mips::PseudoMFLO:
423 Opc = isMicroMips ? Mips::MFLO16_MM : Mips::MFLO;
424 expandPseudoMFHiLo(MBB, MI, Opc);
426 case Mips::PseudoMFHI64:
427 expandPseudoMFHiLo(MBB, MI, Mips::MFHI64);
429 case Mips::PseudoMFLO64:
430 expandPseudoMFHiLo(MBB, MI, Mips::MFLO64);
432 case Mips::PseudoMTLOHI:
433 expandPseudoMTLoHi(MBB, MI, Mips::MTLO, Mips::MTHI, false);
435 case Mips::PseudoMTLOHI64:
436 expandPseudoMTLoHi(MBB, MI, Mips::MTLO64, Mips::MTHI64, false);
438 case Mips::PseudoMTLOHI_DSP:
439 expandPseudoMTLoHi(MBB, MI, Mips::MTLO_DSP, Mips::MTHI_DSP, true);
441 case Mips::PseudoCVT_S_W:
442 expandCvtFPInt(MBB, MI, Mips::CVT_S_W, Mips::MTC1, false);
444 case Mips::PseudoCVT_D32_W:
445 Opc = isMicroMips ? Mips::CVT_D32_W_MM : Mips::CVT_D32_W;
446 expandCvtFPInt(MBB, MI, Opc, Mips::MTC1, false);
448 case Mips::PseudoCVT_S_L:
449 expandCvtFPInt(MBB, MI, Mips::CVT_S_L, Mips::DMTC1, true);
451 case Mips::PseudoCVT_D64_W:
452 Opc = isMicroMips ? Mips::CVT_D64_W_MM : Mips::CVT_D64_W;
453 expandCvtFPInt(MBB, MI, Opc, Mips::MTC1, true);
455 case Mips::PseudoCVT_D64_L:
456 expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true);
458 case Mips::BuildPairF64:
459 expandBuildPairF64(MBB, MI, isMicroMips, false);
461 case Mips::BuildPairF64_64:
462 expandBuildPairF64(MBB, MI, isMicroMips, true);
464 case Mips::ExtractElementF64:
465 expandExtractElementF64(MBB, MI, isMicroMips, false);
467 case Mips::ExtractElementF64_64:
468 expandExtractElementF64(MBB, MI, isMicroMips, true);
470 case Mips::MIPSeh_return32:
471 case Mips::MIPSeh_return64:
472 expandEhReturn(MBB, MI);
480 /// getOppositeBranchOpc - Return the inverse of the specified
481 /// opcode, e.g. turning BEQ to BNE.
482 unsigned MipsSEInstrInfo::getOppositeBranchOpc(unsigned Opc) const {
484 default: llvm_unreachable("Illegal opcode!");
485 case Mips::BEQ: return Mips::BNE;
486 case Mips::BEQ_MM: return Mips::BNE_MM;
487 case Mips::BNE: return Mips::BEQ;
488 case Mips::BNE_MM: return Mips::BEQ_MM;
489 case Mips::BGTZ: return Mips::BLEZ;
490 case Mips::BGEZ: return Mips::BLTZ;
491 case Mips::BLTZ: return Mips::BGEZ;
492 case Mips::BLEZ: return Mips::BGTZ;
493 case Mips::BGTZ_MM: return Mips::BLEZ_MM;
494 case Mips::BGEZ_MM: return Mips::BLTZ_MM;
495 case Mips::BLTZ_MM: return Mips::BGEZ_MM;
496 case Mips::BLEZ_MM: return Mips::BGTZ_MM;
497 case Mips::BEQ64: return Mips::BNE64;
498 case Mips::BNE64: return Mips::BEQ64;
499 case Mips::BGTZ64: return Mips::BLEZ64;
500 case Mips::BGEZ64: return Mips::BLTZ64;
501 case Mips::BLTZ64: return Mips::BGEZ64;
502 case Mips::BLEZ64: return Mips::BGTZ64;
503 case Mips::BC1T: return Mips::BC1F;
504 case Mips::BC1F: return Mips::BC1T;
505 case Mips::BC1T_MM: return Mips::BC1F_MM;
506 case Mips::BC1F_MM: return Mips::BC1T_MM;
507 case Mips::BEQZ16_MM: return Mips::BNEZ16_MM;
508 case Mips::BNEZ16_MM: return Mips::BEQZ16_MM;
509 case Mips::BEQZC_MM: return Mips::BNEZC_MM;
510 case Mips::BNEZC_MM: return Mips::BEQZC_MM;
511 case Mips::BEQZC: return Mips::BNEZC;
512 case Mips::BNEZC: return Mips::BEQZC;
513 case Mips::BLEZC: return Mips::BGTZC;
514 case Mips::BGEZC: return Mips::BLTZC;
515 case Mips::BGEC: return Mips::BLTC;
516 case Mips::BGTZC: return Mips::BLEZC;
517 case Mips::BLTZC: return Mips::BGEZC;
518 case Mips::BLTC: return Mips::BGEC;
519 case Mips::BGEUC: return Mips::BLTUC;
520 case Mips::BLTUC: return Mips::BGEUC;
521 case Mips::BEQC: return Mips::BNEC;
522 case Mips::BNEC: return Mips::BEQC;
523 case Mips::BC1EQZ: return Mips::BC1NEZ;
524 case Mips::BC1NEZ: return Mips::BC1EQZ;
525 case Mips::BEQZC_MMR6: return Mips::BNEZC_MMR6;
526 case Mips::BNEZC_MMR6: return Mips::BEQZC_MMR6;
527 case Mips::BLEZC_MMR6: return Mips::BGTZC_MMR6;
528 case Mips::BGEZC_MMR6: return Mips::BLTZC_MMR6;
529 case Mips::BGEC_MMR6: return Mips::BLTC_MMR6;
530 case Mips::BGTZC_MMR6: return Mips::BLEZC_MMR6;
531 case Mips::BLTZC_MMR6: return Mips::BGEZC_MMR6;
532 case Mips::BLTC_MMR6: return Mips::BGEC_MMR6;
533 case Mips::BGEUC_MMR6: return Mips::BLTUC_MMR6;
534 case Mips::BLTUC_MMR6: return Mips::BGEUC_MMR6;
535 case Mips::BEQC_MMR6: return Mips::BNEC_MMR6;
536 case Mips::BNEC_MMR6: return Mips::BEQC_MMR6;
537 case Mips::BC1EQZC_MMR6: return Mips::BC1NEZC_MMR6;
538 case Mips::BC1NEZC_MMR6: return Mips::BC1EQZC_MMR6;
539 case Mips::BEQZC64: return Mips::BNEZC64;
540 case Mips::BNEZC64: return Mips::BEQZC64;
541 case Mips::BEQC64: return Mips::BNEC64;
542 case Mips::BNEC64: return Mips::BEQC64;
543 case Mips::BGEC64: return Mips::BLTC64;
544 case Mips::BGEUC64: return Mips::BLTUC64;
545 case Mips::BLTC64: return Mips::BGEC64;
546 case Mips::BLTUC64: return Mips::BGEUC64;
547 case Mips::BGTZC64: return Mips::BLEZC64;
548 case Mips::BGEZC64: return Mips::BLTZC64;
549 case Mips::BLTZC64: return Mips::BGEZC64;
550 case Mips::BLEZC64: return Mips::BGTZC64;
551 case Mips::BBIT0: return Mips::BBIT1;
552 case Mips::BBIT1: return Mips::BBIT0;
553 case Mips::BBIT032: return Mips::BBIT132;
554 case Mips::BBIT132: return Mips::BBIT032;
555 case Mips::BZ_B: return Mips::BNZ_B;
556 case Mips::BZ_H: return Mips::BNZ_H;
557 case Mips::BZ_W: return Mips::BNZ_W;
558 case Mips::BZ_D: return Mips::BNZ_D;
559 case Mips::BZ_V: return Mips::BNZ_V;
560 case Mips::BNZ_B: return Mips::BZ_B;
561 case Mips::BNZ_H: return Mips::BZ_H;
562 case Mips::BNZ_W: return Mips::BZ_W;
563 case Mips::BNZ_D: return Mips::BZ_D;
564 case Mips::BNZ_V: return Mips::BZ_V;
568 /// Adjust SP by Amount bytes.
569 void MipsSEInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
570 MachineBasicBlock &MBB,
571 MachineBasicBlock::iterator I) const {
572 MipsABIInfo ABI = Subtarget.getABI();
574 unsigned ADDiu = ABI.GetPtrAddiuOp();
579 if (isInt<16>(Amount)) {
580 // addi sp, sp, amount
581 BuildMI(MBB, I, DL, get(ADDiu), SP).addReg(SP).addImm(Amount);
583 // For numbers which are not 16bit integers we synthesize Amount inline
584 // then add or subtract it from sp.
585 unsigned Opc = ABI.GetPtrAdduOp();
587 Opc = ABI.GetPtrSubuOp();
590 unsigned Reg = loadImmediate(Amount, MBB, I, DL, nullptr);
591 BuildMI(MBB, I, DL, get(Opc), SP).addReg(SP).addReg(Reg, RegState::Kill);
595 /// This function generates the sequence of instructions needed to get the
596 /// result of adding register REG and immediate IMM.
597 unsigned MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
598 MachineBasicBlock::iterator II,
600 unsigned *NewImm) const {
601 MipsAnalyzeImmediate AnalyzeImm;
602 const MipsSubtarget &STI = Subtarget;
603 MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
604 unsigned Size = STI.isABI_N64() ? 64 : 32;
605 unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
606 unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
607 const TargetRegisterClass *RC = STI.isABI_N64() ?
608 &Mips::GPR64RegClass : &Mips::GPR32RegClass;
609 bool LastInstrIsADDiu = NewImm;
611 const MipsAnalyzeImmediate::InstSeq &Seq =
612 AnalyzeImm.Analyze(Imm, Size, LastInstrIsADDiu);
613 MipsAnalyzeImmediate::InstSeq::const_iterator Inst = Seq.begin();
615 assert(Seq.size() && (!LastInstrIsADDiu || (Seq.size() > 1)));
617 // The first instruction can be a LUi, which is different from other
618 // instructions (ADDiu, ORI and SLL) in that it does not have a register
620 unsigned Reg = RegInfo.createVirtualRegister(RC);
622 if (Inst->Opc == LUi)
623 BuildMI(MBB, II, DL, get(LUi), Reg).addImm(SignExtend64<16>(Inst->ImmOpnd));
625 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(ZEROReg)
626 .addImm(SignExtend64<16>(Inst->ImmOpnd));
628 // Build the remaining instructions in Seq.
629 for (++Inst; Inst != Seq.end() - LastInstrIsADDiu; ++Inst)
630 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(Reg, RegState::Kill)
631 .addImm(SignExtend64<16>(Inst->ImmOpnd));
633 if (LastInstrIsADDiu)
634 *NewImm = Inst->ImmOpnd;
639 unsigned MipsSEInstrInfo::getAnalyzableBrOpc(unsigned Opc) const {
640 return (Opc == Mips::BEQ || Opc == Mips::BEQ_MM || Opc == Mips::BNE ||
641 Opc == Mips::BNE_MM || Opc == Mips::BGTZ || Opc == Mips::BGEZ ||
642 Opc == Mips::BLTZ || Opc == Mips::BLEZ || Opc == Mips::BEQ64 ||
643 Opc == Mips::BNE64 || Opc == Mips::BGTZ64 || Opc == Mips::BGEZ64 ||
644 Opc == Mips::BLTZ64 || Opc == Mips::BLEZ64 || Opc == Mips::BC1T ||
645 Opc == Mips::BC1F || Opc == Mips::B || Opc == Mips::J ||
646 Opc == Mips::B_MM || Opc == Mips::BEQZC_MM ||
647 Opc == Mips::BNEZC_MM || Opc == Mips::BEQC || Opc == Mips::BNEC ||
648 Opc == Mips::BLTC || Opc == Mips::BGEC || Opc == Mips::BLTUC ||
649 Opc == Mips::BGEUC || Opc == Mips::BGTZC || Opc == Mips::BLEZC ||
650 Opc == Mips::BGEZC || Opc == Mips::BLTZC || Opc == Mips::BEQZC ||
651 Opc == Mips::BNEZC || Opc == Mips::BEQZC64 || Opc == Mips::BNEZC64 ||
652 Opc == Mips::BEQC64 || Opc == Mips::BNEC64 || Opc == Mips::BGEC64 ||
653 Opc == Mips::BGEUC64 || Opc == Mips::BLTC64 || Opc == Mips::BLTUC64 ||
654 Opc == Mips::BGTZC64 || Opc == Mips::BGEZC64 ||
655 Opc == Mips::BLTZC64 || Opc == Mips::BLEZC64 || Opc == Mips::BC ||
656 Opc == Mips::BBIT0 || Opc == Mips::BBIT1 || Opc == Mips::BBIT032 ||
657 Opc == Mips::BBIT132 || Opc == Mips::BC_MMR6 ||
658 Opc == Mips::BEQC_MMR6 || Opc == Mips::BNEC_MMR6 ||
659 Opc == Mips::BLTC_MMR6 || Opc == Mips::BGEC_MMR6 ||
660 Opc == Mips::BLTUC_MMR6 || Opc == Mips::BGEUC_MMR6 ||
661 Opc == Mips::BGTZC_MMR6 || Opc == Mips::BLEZC_MMR6 ||
662 Opc == Mips::BGEZC_MMR6 || Opc == Mips::BLTZC_MMR6 ||
663 Opc == Mips::BEQZC_MMR6 || Opc == Mips::BNEZC_MMR6) ? Opc : 0;
666 void MipsSEInstrInfo::expandRetRA(MachineBasicBlock &MBB,
667 MachineBasicBlock::iterator I) const {
669 MachineInstrBuilder MIB;
670 if (Subtarget.isGP64bit())
671 MIB = BuildMI(MBB, I, I->getDebugLoc(), get(Mips::PseudoReturn64))
672 .addReg(Mips::RA_64, RegState::Undef);
674 MIB = BuildMI(MBB, I, I->getDebugLoc(), get(Mips::PseudoReturn))
675 .addReg(Mips::RA, RegState::Undef);
677 // Retain any imp-use flags.
678 for (auto & MO : I->operands()) {
684 void MipsSEInstrInfo::expandERet(MachineBasicBlock &MBB,
685 MachineBasicBlock::iterator I) const {
686 BuildMI(MBB, I, I->getDebugLoc(), get(Mips::ERET));
689 std::pair<bool, bool>
690 MipsSEInstrInfo::compareOpndSize(unsigned Opc,
691 const MachineFunction &MF) const {
692 const MCInstrDesc &Desc = get(Opc);
693 assert(Desc.NumOperands == 2 && "Unary instruction expected.");
694 const MipsRegisterInfo *RI = &getRegisterInfo();
695 unsigned DstRegSize = RI->getRegSizeInBits(*getRegClass(Desc, 0, RI, MF));
696 unsigned SrcRegSize = RI->getRegSizeInBits(*getRegClass(Desc, 1, RI, MF));
698 return std::make_pair(DstRegSize > SrcRegSize, DstRegSize < SrcRegSize);
701 void MipsSEInstrInfo::expandPseudoMFHiLo(MachineBasicBlock &MBB,
702 MachineBasicBlock::iterator I,
703 unsigned NewOpc) const {
704 BuildMI(MBB, I, I->getDebugLoc(), get(NewOpc), I->getOperand(0).getReg());
707 void MipsSEInstrInfo::expandPseudoMTLoHi(MachineBasicBlock &MBB,
708 MachineBasicBlock::iterator I,
711 bool HasExplicitDef) const {
713 // lo_hi pseudomtlohi $gpr0, $gpr1
714 // to these two instructions:
718 DebugLoc DL = I->getDebugLoc();
719 const MachineOperand &SrcLo = I->getOperand(1), &SrcHi = I->getOperand(2);
720 MachineInstrBuilder LoInst = BuildMI(MBB, I, DL, get(LoOpc));
721 MachineInstrBuilder HiInst = BuildMI(MBB, I, DL, get(HiOpc));
723 // Add lo/hi registers if the mtlo/hi instructions created have explicit
725 if (HasExplicitDef) {
726 unsigned DstReg = I->getOperand(0).getReg();
727 unsigned DstLo = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
728 unsigned DstHi = getRegisterInfo().getSubReg(DstReg, Mips::sub_hi);
729 LoInst.addReg(DstLo, RegState::Define);
730 HiInst.addReg(DstHi, RegState::Define);
733 LoInst.addReg(SrcLo.getReg(), getKillRegState(SrcLo.isKill()));
734 HiInst.addReg(SrcHi.getReg(), getKillRegState(SrcHi.isKill()));
737 void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB,
738 MachineBasicBlock::iterator I,
739 unsigned CvtOpc, unsigned MovOpc,
741 const MCInstrDesc &CvtDesc = get(CvtOpc), &MovDesc = get(MovOpc);
742 const MachineOperand &Dst = I->getOperand(0), &Src = I->getOperand(1);
743 unsigned DstReg = Dst.getReg(), SrcReg = Src.getReg(), TmpReg = DstReg;
744 unsigned KillSrc = getKillRegState(Src.isKill());
745 DebugLoc DL = I->getDebugLoc();
746 bool DstIsLarger, SrcIsLarger;
748 std::tie(DstIsLarger, SrcIsLarger) =
749 compareOpndSize(CvtOpc, *MBB.getParent());
752 TmpReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
755 DstReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
757 BuildMI(MBB, I, DL, MovDesc, TmpReg).addReg(SrcReg, KillSrc);
758 BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill);
761 void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB,
762 MachineBasicBlock::iterator I,
765 unsigned DstReg = I->getOperand(0).getReg();
766 unsigned SrcReg = I->getOperand(1).getReg();
767 unsigned N = I->getOperand(2).getImm();
768 DebugLoc dl = I->getDebugLoc();
770 assert(N < 2 && "Invalid immediate");
771 unsigned SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
772 unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
774 // FPXX on MIPS-II or MIPS32r1 should have been handled with a spill/reload
775 // in MipsSEFrameLowering.cpp.
776 assert(!(Subtarget.isABI_FPXX() && !Subtarget.hasMips32r2()));
778 // FP64A (FP64 with nooddspreg) should have been handled with a spill/reload
779 // in MipsSEFrameLowering.cpp.
780 assert(!(Subtarget.isFP64bit() && !Subtarget.useOddSPReg()));
782 if (SubIdx == Mips::sub_hi && Subtarget.hasMTHC1()) {
783 // FIXME: Strictly speaking MFHC1 only reads the top 32-bits however, we
784 // claim to read the whole 64-bits as part of a white lie used to
785 // temporarily work around a widespread bug in the -mfp64 support.
786 // The problem is that none of the 32-bit fpu ops mention the fact
787 // that they clobber the upper 32-bits of the 64-bit FPR. Fixing that
788 // requires a major overhaul of the FPU implementation which can't
789 // be done right now due to time constraints.
790 // MFHC1 is one of two instructions that are affected since they are
791 // the only instructions that don't read the lower 32-bits.
792 // We therefore pretend that it reads the bottom 32-bits to
793 // artificially create a dependency and prevent the scheduler
794 // changing the behaviour of the code.
796 get(isMicroMips ? (FP64 ? Mips::MFHC1_D64_MM : Mips::MFHC1_D32_MM)
797 : (FP64 ? Mips::MFHC1_D64 : Mips::MFHC1_D32)),
801 BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
804 void MipsSEInstrInfo::expandBuildPairF64(MachineBasicBlock &MBB,
805 MachineBasicBlock::iterator I,
806 bool isMicroMips, bool FP64) const {
807 unsigned DstReg = I->getOperand(0).getReg();
808 unsigned LoReg = I->getOperand(1).getReg(), HiReg = I->getOperand(2).getReg();
809 const MCInstrDesc& Mtc1Tdd = get(Mips::MTC1);
810 DebugLoc dl = I->getDebugLoc();
811 const TargetRegisterInfo &TRI = getRegisterInfo();
813 // When mthc1 is available, use:
817 // Otherwise, for O32 FPXX ABI:
818 // spill + reload via ldc1
819 // This case is handled by the frame lowering code.
821 // Otherwise, for FP32:
825 // The case where dmtc1 is available doesn't need to be handled here
826 // because it never creates a BuildPairF64 node.
828 // FPXX on MIPS-II or MIPS32r1 should have been handled with a spill/reload
829 // in MipsSEFrameLowering.cpp.
830 assert(!(Subtarget.isABI_FPXX() && !Subtarget.hasMips32r2()));
832 // FP64A (FP64 with nooddspreg) should have been handled with a spill/reload
833 // in MipsSEFrameLowering.cpp.
834 assert(!(Subtarget.isFP64bit() && !Subtarget.useOddSPReg()));
836 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_lo))
839 if (Subtarget.hasMTHC1()) {
840 // FIXME: The .addReg(DstReg) is a white lie used to temporarily work
841 // around a widespread bug in the -mfp64 support.
842 // The problem is that none of the 32-bit fpu ops mention the fact
843 // that they clobber the upper 32-bits of the 64-bit FPR. Fixing that
844 // requires a major overhaul of the FPU implementation which can't
845 // be done right now due to time constraints.
846 // MTHC1 is one of two instructions that are affected since they are
847 // the only instructions that don't read the lower 32-bits.
848 // We therefore pretend that it reads the bottom 32-bits to
849 // artificially create a dependency and prevent the scheduler
850 // changing the behaviour of the code.
852 get(isMicroMips ? (FP64 ? Mips::MTHC1_D64_MM : Mips::MTHC1_D32_MM)
853 : (FP64 ? Mips::MTHC1_D64 : Mips::MTHC1_D32)),
857 } else if (Subtarget.isABI_FPXX())
858 llvm_unreachable("BuildPairF64 not expanded in frame lowering code!");
860 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_hi))
864 void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
865 MachineBasicBlock::iterator I) const {
866 // This pseudo instruction is generated as part of the lowering of
867 // ISD::EH_RETURN. We convert it to a stack increment by OffsetReg, and
868 // indirect jump to TargetReg
869 MipsABIInfo ABI = Subtarget.getABI();
870 unsigned ADDU = ABI.GetPtrAdduOp();
871 unsigned SP = Subtarget.isGP64bit() ? Mips::SP_64 : Mips::SP;
872 unsigned RA = Subtarget.isGP64bit() ? Mips::RA_64 : Mips::RA;
873 unsigned T9 = Subtarget.isGP64bit() ? Mips::T9_64 : Mips::T9;
874 unsigned ZERO = Subtarget.isGP64bit() ? Mips::ZERO_64 : Mips::ZERO;
875 unsigned OffsetReg = I->getOperand(0).getReg();
876 unsigned TargetReg = I->getOperand(1).getReg();
878 // addu $ra, $v0, $zero
879 // addu $sp, $sp, $v1
880 // jr $ra (via RetRA)
881 const TargetMachine &TM = MBB.getParent()->getTarget();
882 if (TM.isPositionIndependent())
883 BuildMI(MBB, I, I->getDebugLoc(), get(ADDU), T9)
886 BuildMI(MBB, I, I->getDebugLoc(), get(ADDU), RA)
889 BuildMI(MBB, I, I->getDebugLoc(), get(ADDU), SP).addReg(SP).addReg(OffsetReg);
893 const MipsInstrInfo *llvm::createMipsSEInstrInfo(const MipsSubtarget &STI) {
894 return new MipsSEInstrInfo(STI);