1 //===- SPUInstrInfo.cpp - Cell SPU 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 Cell SPU implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "SPURegisterNames.h"
15 #include "SPUInstrInfo.h"
16 #include "SPUInstrBuilder.h"
17 #include "SPUTargetMachine.h"
18 #include "SPUGenInstrInfo.inc"
19 #include "llvm/CodeGen/MachineInstrBuilder.h"
20 #include "llvm/Support/Streams.h"
25 //! Predicate for an unconditional branch instruction
26 inline bool isUncondBranch(const MachineInstr *I) {
27 unsigned opc = I->getOpcode();
29 return (opc == SPU::BR
34 inline bool isCondBranch(const MachineInstr *I) {
35 unsigned opc = I->getOpcode();
37 return (opc == SPU::BRNZ
44 SPUInstrInfo::SPUInstrInfo(SPUTargetMachine &tm)
45 : TargetInstrInfoImpl(SPUInsts, sizeof(SPUInsts)/sizeof(SPUInsts[0])),
47 RI(*TM.getSubtargetImpl(), *this)
52 /// getPointerRegClass - Return the register class to use to hold pointers.
53 /// This is used for addressing modes.
54 const TargetRegisterClass *
55 SPUInstrInfo::getPointerRegClass() const
57 return &SPU::R32CRegClass;
61 SPUInstrInfo::isMoveInstr(const MachineInstr& MI,
63 unsigned& destReg) const {
64 // Primarily, ORI and OR are generated by copyRegToReg. But, there are other
65 // cases where we can safely say that what's being done is really a move
66 // (see how PowerPC does this -- it's the model for this code too.)
67 switch (MI.getOpcode()) {
82 assert(MI.getNumOperands() == 3 &&
83 MI.getOperand(0).isReg() &&
84 MI.getOperand(1).isReg() &&
85 MI.getOperand(2).isImm() &&
86 "invalid SPU ORI/ORHI/ORBI/AHI/AI/SFI/SFHI instruction!");
87 if (MI.getOperand(2).getImm() == 0) {
88 sourceReg = MI.getOperand(1).getReg();
89 destReg = MI.getOperand(0).getReg();
94 assert(MI.getNumOperands() == 3 &&
95 "wrong number of operands to AIr32");
96 if (MI.getOperand(0).isReg() &&
97 (MI.getOperand(1).isReg() ||
98 MI.getOperand(1).isFI()) &&
99 (MI.getOperand(2).isImm() &&
100 MI.getOperand(2).getImm() == 0)) {
101 sourceReg = MI.getOperand(1).getReg();
102 destReg = MI.getOperand(0).getReg();
106 case SPU::ORv16i8_i8:
107 case SPU::ORv8i16_i16:
108 case SPU::ORv4i32_i32:
109 case SPU::ORv2i64_i64:
110 case SPU::ORv4f32_f32:
111 case SPU::ORv2f64_f64:
112 case SPU::ORi8_v16i8:
113 case SPU::ORi16_v8i16:
114 case SPU::ORi32_v4i32:
115 case SPU::ORi64_v2i64:
116 case SPU::ORf32_v4f32:
117 case SPU::ORf64_v2f64:
125 assert(MI.getNumOperands() == 3 &&
126 MI.getOperand(0).isReg() &&
127 MI.getOperand(1).isReg() &&
128 MI.getOperand(2).isReg() &&
129 "invalid SPU OR(vec|r32|r64|gprc) instruction!");
130 if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg()) {
131 sourceReg = MI.getOperand(1).getReg();
132 destReg = MI.getOperand(0).getReg();
142 SPUInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
143 int &FrameIndex) const {
144 switch (MI->getOpcode()) {
155 const MachineOperand MOp1 = MI->getOperand(1);
156 const MachineOperand MOp2 = MI->getOperand(2);
159 || (MOp2.isReg() && MOp2.getReg() == SPU::R1))) {
161 FrameIndex = MOp2.getIndex();
163 FrameIndex = MOp1.getImm() / SPUFrameInfo::stackSlotSize();
164 return MI->getOperand(0).getReg();
173 if (MI->getOperand(1).isReg() && MI->getOperand(2).isReg()
174 && (MI->getOperand(2).getReg() == SPU::R1
175 || MI->getOperand(1).getReg() == SPU::R1)) {
176 FrameIndex = MI->getOperand(2).getIndex();
177 return MI->getOperand(0).getReg();
185 SPUInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
186 int &FrameIndex) const {
187 switch (MI->getOpcode()) {
199 const MachineOperand MOp1 = MI->getOperand(1);
200 const MachineOperand MOp2 = MI->getOperand(2);
203 || (MOp2.isReg() && MOp2.getReg() == SPU::R1))) {
205 FrameIndex = MOp2.getIndex();
207 FrameIndex = MOp1.getImm() / SPUFrameInfo::stackSlotSize();
208 return MI->getOperand(0).getReg();
222 if (MI->getOperand(1).isReg() && MI->getOperand(2).isReg()
223 && (MI->getOperand(2).getReg() == SPU::R1
224 || MI->getOperand(1).getReg() == SPU::R1)) {
225 FrameIndex = MI->getOperand(2).getIndex();
226 return MI->getOperand(0).getReg();
233 bool SPUInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
234 MachineBasicBlock::iterator MI,
235 unsigned DestReg, unsigned SrcReg,
236 const TargetRegisterClass *DestRC,
237 const TargetRegisterClass *SrcRC) const
239 // We support cross register class moves for our aliases, such as R3 in any
240 // reg class to any other reg class containing R3. This is required because
241 // we instruction select bitconvert i64 -> f64 as a noop for example, so our
242 // types have no specific meaning.
244 if (DestRC == SPU::R8CRegisterClass) {
245 BuildMI(MBB, MI, get(SPU::ORBIr8), DestReg).addReg(SrcReg).addImm(0);
246 } else if (DestRC == SPU::R16CRegisterClass) {
247 BuildMI(MBB, MI, get(SPU::ORHIr16), DestReg).addReg(SrcReg).addImm(0);
248 } else if (DestRC == SPU::R32CRegisterClass) {
249 BuildMI(MBB, MI, get(SPU::ORIr32), DestReg).addReg(SrcReg).addImm(0);
250 } else if (DestRC == SPU::R32FPRegisterClass) {
251 BuildMI(MBB, MI, get(SPU::ORf32), DestReg).addReg(SrcReg)
253 } else if (DestRC == SPU::R64CRegisterClass) {
254 BuildMI(MBB, MI, get(SPU::ORr64), DestReg).addReg(SrcReg)
256 } else if (DestRC == SPU::R64FPRegisterClass) {
257 BuildMI(MBB, MI, get(SPU::ORf64), DestReg).addReg(SrcReg)
259 } /* else if (DestRC == SPU::GPRCRegisterClass) {
260 BuildMI(MBB, MI, get(SPU::ORgprc), DestReg).addReg(SrcReg)
262 } */ else if (DestRC == SPU::VECREGRegisterClass) {
263 BuildMI(MBB, MI, get(SPU::ORv4i32), DestReg).addReg(SrcReg)
266 // Attempt to copy unknown/unsupported register class!
274 SPUInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
275 MachineBasicBlock::iterator MI,
276 unsigned SrcReg, bool isKill, int FrameIdx,
277 const TargetRegisterClass *RC) const
280 bool isValidFrameIdx = (FrameIdx < SPUFrameInfo::maxFrameOffset());
281 if (RC == SPU::GPRCRegisterClass) {
282 opc = (isValidFrameIdx ? SPU::STQDr128 : SPU::STQXr128);
283 } else if (RC == SPU::R64CRegisterClass) {
284 opc = (isValidFrameIdx ? SPU::STQDr64 : SPU::STQXr64);
285 } else if (RC == SPU::R64FPRegisterClass) {
286 opc = (isValidFrameIdx ? SPU::STQDr64 : SPU::STQXr64);
287 } else if (RC == SPU::R32CRegisterClass) {
288 opc = (isValidFrameIdx ? SPU::STQDr32 : SPU::STQXr32);
289 } else if (RC == SPU::R32FPRegisterClass) {
290 opc = (isValidFrameIdx ? SPU::STQDr32 : SPU::STQXr32);
291 } else if (RC == SPU::R16CRegisterClass) {
292 opc = (isValidFrameIdx ? SPU::STQDr16 : SPU::STQXr16);
293 } else if (RC == SPU::R8CRegisterClass) {
294 opc = (isValidFrameIdx ? SPU::STQDr8 : SPU::STQXr8);
296 assert(0 && "Unknown regclass!");
300 addFrameReference(BuildMI(MBB, MI, get(opc))
301 .addReg(SrcReg, false, false, isKill), FrameIdx);
304 void SPUInstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
306 SmallVectorImpl<MachineOperand> &Addr,
307 const TargetRegisterClass *RC,
308 SmallVectorImpl<MachineInstr*> &NewMIs) const {
309 cerr << "storeRegToAddr() invoked!\n";
312 if (Addr[0].isFI()) {
313 /* do what storeRegToStackSlot does here */
316 if (RC == SPU::GPRCRegisterClass) {
317 /* Opc = PPC::STW; */
318 } else if (RC == SPU::R16CRegisterClass) {
319 /* Opc = PPC::STD; */
320 } else if (RC == SPU::R32CRegisterClass) {
321 /* Opc = PPC::STFD; */
322 } else if (RC == SPU::R32FPRegisterClass) {
323 /* Opc = PPC::STFD; */
324 } else if (RC == SPU::R64FPRegisterClass) {
325 /* Opc = PPC::STFS; */
326 } else if (RC == SPU::VECREGRegisterClass) {
327 /* Opc = PPC::STVX; */
329 assert(0 && "Unknown regclass!");
332 MachineInstrBuilder MIB = BuildMI(MF, get(Opc))
333 .addReg(SrcReg, false, false, isKill);
334 for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
335 MachineOperand &MO = Addr[i];
337 MIB.addReg(MO.getReg());
339 MIB.addImm(MO.getImm());
341 MIB.addFrameIndex(MO.getIndex());
343 NewMIs.push_back(MIB);
348 SPUInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
349 MachineBasicBlock::iterator MI,
350 unsigned DestReg, int FrameIdx,
351 const TargetRegisterClass *RC) const
354 bool isValidFrameIdx = (FrameIdx < SPUFrameInfo::maxFrameOffset());
355 if (RC == SPU::GPRCRegisterClass) {
356 opc = (isValidFrameIdx ? SPU::LQDr128 : SPU::LQXr128);
357 } else if (RC == SPU::R64CRegisterClass) {
358 opc = (isValidFrameIdx ? SPU::LQDr64 : SPU::LQXr64);
359 } else if (RC == SPU::R64FPRegisterClass) {
360 opc = (isValidFrameIdx ? SPU::LQDr64 : SPU::LQXr64);
361 } else if (RC == SPU::R32CRegisterClass) {
362 opc = (isValidFrameIdx ? SPU::LQDr32 : SPU::LQXr32);
363 } else if (RC == SPU::R32FPRegisterClass) {
364 opc = (isValidFrameIdx ? SPU::LQDr32 : SPU::LQXr32);
365 } else if (RC == SPU::R16CRegisterClass) {
366 opc = (isValidFrameIdx ? SPU::LQDr16 : SPU::LQXr16);
367 } else if (RC == SPU::R8CRegisterClass) {
368 opc = (isValidFrameIdx ? SPU::LQDr8 : SPU::LQXr8);
370 assert(0 && "Unknown regclass in loadRegFromStackSlot!");
374 addFrameReference(BuildMI(MBB, MI, get(opc)).addReg(DestReg), FrameIdx);
378 \note We are really pessimistic here about what kind of a load we're doing.
380 void SPUInstrInfo::loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
381 SmallVectorImpl<MachineOperand> &Addr,
382 const TargetRegisterClass *RC,
383 SmallVectorImpl<MachineInstr*> &NewMIs)
385 cerr << "loadRegToAddr() invoked!\n";
388 if (Addr[0].isFI()) {
389 /* do what loadRegFromStackSlot does here... */
392 if (RC == SPU::R8CRegisterClass) {
393 /* do brilliance here */
394 } else if (RC == SPU::R16CRegisterClass) {
395 /* Opc = PPC::LWZ; */
396 } else if (RC == SPU::R32CRegisterClass) {
398 } else if (RC == SPU::R32FPRegisterClass) {
399 /* Opc = PPC::LFD; */
400 } else if (RC == SPU::R64FPRegisterClass) {
401 /* Opc = PPC::LFS; */
402 } else if (RC == SPU::VECREGRegisterClass) {
403 /* Opc = PPC::LVX; */
404 } else if (RC == SPU::GPRCRegisterClass) {
405 /* Opc = something else! */
407 assert(0 && "Unknown regclass!");
410 MachineInstrBuilder MIB = BuildMI(MF, get(Opc), DestReg);
411 for (unsigned i = 0, e = Addr.size(); i != e; ++i) {
412 MachineOperand &MO = Addr[i];
414 MIB.addReg(MO.getReg());
416 MIB.addImm(MO.getImm());
418 MIB.addFrameIndex(MO.getIndex());
420 NewMIs.push_back(MIB);
424 /// foldMemoryOperand - SPU, like PPC, can only fold spills into
425 /// copy instructions, turning them into load/store instructions.
427 SPUInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
429 const SmallVectorImpl<unsigned> &Ops,
430 int FrameIndex) const
432 #if SOMEDAY_SCOTT_LOOKS_AT_ME_AGAIN
433 if (Ops.size() != 1) return NULL;
435 unsigned OpNum = Ops[0];
436 unsigned Opc = MI->getOpcode();
437 MachineInstr *NewMI = 0;
439 if ((Opc == SPU::ORr32
440 || Opc == SPU::ORv4i32)
441 && MI->getOperand(1).getReg() == MI->getOperand(2).getReg()) {
442 if (OpNum == 0) { // move -> store
443 unsigned InReg = MI->getOperand(1).getReg();
444 bool isKill = MI->getOperand(1).isKill();
445 if (FrameIndex < SPUFrameInfo::maxFrameOffset()) {
446 NewMI = addFrameReference(BuildMI(MF, TII.get(SPU::STQDr32))
447 .addReg(InReg, false, false, isKill),
450 } else { // move -> load
451 unsigned OutReg = MI->getOperand(0).getReg();
452 bool isDead = MI->getOperand(0).isDead();
453 Opc = (FrameIndex < SPUFrameInfo::maxFrameOffset())
454 ? SPU::STQDr32 : SPU::STQXr32;
455 NewMI = addFrameReference(BuildMI(MF, TII.get(Opc))
456 .addReg(OutReg, true, false, false, isDead), FrameIndex);
468 \note This code was kiped from PPC. There may be more branch analysis for
469 CellSPU than what's currently done here.
472 SPUInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
473 MachineBasicBlock *&FBB,
474 SmallVectorImpl<MachineOperand> &Cond) const {
475 // If the block has no terminators, it just falls into the block after it.
476 MachineBasicBlock::iterator I = MBB.end();
477 if (I == MBB.begin() || !isUnpredicatedTerminator(--I))
480 // Get the last instruction in the block.
481 MachineInstr *LastInst = I;
483 // If there is only one terminator instruction, process it.
484 if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) {
485 if (isUncondBranch(LastInst)) {
486 TBB = LastInst->getOperand(0).getMBB();
488 } else if (isCondBranch(LastInst)) {
489 // Block ends with fall-through condbranch.
490 TBB = LastInst->getOperand(1).getMBB();
491 Cond.push_back(LastInst->getOperand(0));
492 Cond.push_back(LastInst->getOperand(1));
495 // Otherwise, don't know what this is.
499 // Get the instruction before it if it's a terminator.
500 MachineInstr *SecondLastInst = I;
502 // If there are three terminators, we don't know what sort of block this is.
503 if (SecondLastInst && I != MBB.begin() &&
504 isUnpredicatedTerminator(--I))
507 // If the block ends with a conditional and unconditional branch, handle it.
508 if (isCondBranch(SecondLastInst) && isUncondBranch(LastInst)) {
509 TBB = SecondLastInst->getOperand(1).getMBB();
510 Cond.push_back(SecondLastInst->getOperand(0));
511 Cond.push_back(SecondLastInst->getOperand(1));
512 FBB = LastInst->getOperand(0).getMBB();
516 // If the block ends with two unconditional branches, handle it. The second
517 // one is not executed, so remove it.
518 if (isUncondBranch(SecondLastInst) && isUncondBranch(LastInst)) {
519 TBB = SecondLastInst->getOperand(0).getMBB();
521 I->eraseFromParent();
525 // Otherwise, can't handle this.
530 SPUInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
531 MachineBasicBlock::iterator I = MBB.end();
532 if (I == MBB.begin())
535 if (!isCondBranch(I) && !isUncondBranch(I))
538 // Remove the first branch.
539 I->eraseFromParent();
541 if (I == MBB.begin())
548 // Remove the second branch.
549 I->eraseFromParent();
554 SPUInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
555 MachineBasicBlock *FBB,
556 const SmallVectorImpl<MachineOperand> &Cond) const {
557 // Shouldn't be a fall through.
558 assert(TBB && "InsertBranch must not be told to insert a fallthrough");
559 assert((Cond.size() == 2 || Cond.size() == 0) &&
560 "SPU branch conditions have two components!");
564 if (Cond.empty()) // Unconditional branch
565 BuildMI(&MBB, get(SPU::BR)).addMBB(TBB);
566 else { // Conditional branch
567 /* BuildMI(&MBB, get(SPU::BRNZ))
568 .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB); */
569 cerr << "SPUInstrInfo::InsertBranch conditional branch logic needed\n";
575 // Two-way Conditional Branch.
577 BuildMI(&MBB, get(SPU::BRNZ))
578 .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
579 BuildMI(&MBB, get(SPU::BR)).addMBB(FBB);
581 cerr << "SPUInstrInfo::InsertBranch conditional branch logic needed\n";