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Fix cut & paste errors (32->64), and codegen float->int more optimally.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21098 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-04-05 17:32:30 +00:00
parent ac6e2dbf52
commit a3829d5580
1 changed files with 8 additions and 68 deletions
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76
lib/Target/PowerPC/PPC64ISelPattern.cpp
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@ -1,4 +1,4 @@
//===-- PPC32ISelPattern.cpp - A pattern matching inst selector for PPC32 -===//
//===-- PPC64ISelPattern.cpp - A pattern matching inst selector for PPC64 -===//
//
// The LLVM Compiler Infrastructure
//
@ -7,7 +7,7 @@
//
//===----------------------------------------------------------------------===//
//
// This file defines a pattern matching instruction selector for 32 bit PowerPC.
// This file defines a pattern matching instruction selector for 64 bit PowerPC.
//
//===----------------------------------------------------------------------===//
@ -1421,73 +1421,13 @@ unsigned ISel::SelectExpr(SDOperand N) {
case ISD::FP_TO_UINT:
case ISD::FP_TO_SINT: {
bool U = (ISD::FP_TO_UINT == opcode);
Tmp1 = SelectExpr(N.getOperand(0));
if (!U) {
Tmp2 = MakeReg(MVT::f64);
BuildMI(BB, PPC::FCTIWZ, 1, Tmp2).addReg(Tmp1);
int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
addFrameReference(BuildMI(BB, PPC::STFD, 3).addReg(Tmp2), FrameIdx);
addFrameReference(BuildMI(BB, PPC::LWZ, 2, Result), FrameIdx, 4);
return Result;
} else {
unsigned Zero = getConstDouble(0.0);
unsigned MaxInt = getConstDouble((1LL << 32) - 1);
unsigned Border = getConstDouble(1LL << 31);
unsigned UseZero = MakeReg(MVT::f64);
unsigned UseMaxInt = MakeReg(MVT::f64);
unsigned UseChoice = MakeReg(MVT::f64);
unsigned TmpReg = MakeReg(MVT::f64);
unsigned TmpReg2 = MakeReg(MVT::f64);
unsigned ConvReg = MakeReg(MVT::f64);
unsigned IntTmp = MakeReg(MVT::i32);
unsigned XorReg = MakeReg(MVT::i32);
MachineFunction *F = BB->getParent();
int FrameIdx = F->getFrameInfo()->CreateStackObject(8, 8);
// Update machine-CFG edges
MachineBasicBlock *XorMBB = new MachineBasicBlock(BB->getBasicBlock());
MachineBasicBlock *PhiMBB = new MachineBasicBlock(BB->getBasicBlock());
MachineBasicBlock *OldMBB = BB;
ilist<MachineBasicBlock>::iterator It = BB; ++It;
F->getBasicBlockList().insert(It, XorMBB);
F->getBasicBlockList().insert(It, PhiMBB);
BB->addSuccessor(XorMBB);
BB->addSuccessor(PhiMBB);
// Convert from floating point to unsigned 32-bit value
// Use 0 if incoming value is < 0.0
BuildMI(BB, PPC::FSEL, 3, UseZero).addReg(Tmp1).addReg(Tmp1).addReg(Zero);
// Use 2**32 - 1 if incoming value is >= 2**32
BuildMI(BB, PPC::FSUB, 2, UseMaxInt).addReg(MaxInt).addReg(Tmp1);
BuildMI(BB, PPC::FSEL, 3, UseChoice).addReg(UseMaxInt).addReg(UseZero)
.addReg(MaxInt);
// Subtract 2**31
BuildMI(BB, PPC::FSUB, 2, TmpReg).addReg(UseChoice).addReg(Border);
// Use difference if >= 2**31
BuildMI(BB, PPC::FCMPU, 2, PPC::CR0).addReg(UseChoice).addReg(Border);
BuildMI(BB, PPC::FSEL, 3, TmpReg2).addReg(TmpReg).addReg(TmpReg)
.addReg(UseChoice);
// Convert to integer
BuildMI(BB, PPC::FCTIWZ, 1, ConvReg).addReg(TmpReg2);
addFrameReference(BuildMI(BB, PPC::STFD, 3).addReg(ConvReg), FrameIdx);
addFrameReference(BuildMI(BB, PPC::LWZ, 2, IntTmp), FrameIdx, 4);
BuildMI(BB, PPC::BLT, 2).addReg(PPC::CR0).addMBB(PhiMBB);
BuildMI(BB, PPC::B, 1).addMBB(XorMBB);
// XorMBB:
// add 2**31 if input was >= 2**31
BB = XorMBB;
BuildMI(BB, PPC::XORIS, 2, XorReg).addReg(IntTmp).addImm(0x8000);
XorMBB->addSuccessor(PhiMBB);
// PhiMBB:
// DestReg = phi [ IntTmp, OldMBB ], [ XorReg, XorMBB ]
BB = PhiMBB;
BuildMI(BB, PPC::PHI, 4, Result).addReg(IntTmp).addMBB(OldMBB)
.addReg(XorReg).addMBB(XorMBB);
return Result;
}
assert(0 && "Should never get here");
return 0;
Tmp2 = MakeReg(MVT::f64);
BuildMI(BB, PPC::FCTIDZ, 1, Tmp2).addReg(Tmp1);
int FrameIdx = BB->getParent()->getFrameInfo()->CreateStackObject(8, 8);
addFrameReference(BuildMI(BB, PPC::STFD, 3).addReg(Tmp2), FrameIdx);
addFrameReference(BuildMI(BB, PPC::LD, 2, Result), FrameIdx);
return Result;
}
case ISD::SETCC: