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* Implement cast (long|ulong) to bool

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* Fix cast of (short|ushort|int|uint) to bool to work right


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6510 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-06-01 03:38:24 +00:00
parent 6c8125fa56
commit 20772547c5
2 changed files with 44 additions and 8 deletions
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26
lib/Target/X86/InstSelectSimple.cpp
View File

@ -1552,10 +1552,28 @@ void ISel::emitCastOperation(MachineBasicBlock *BB,
// Implement casts to bool by using compare on the operand followed by set if
// not zero on the result.
if (DestTy == Type::BoolTy) {
if (SrcClass == cFP || SrcClass == cLong)
abort(); // FIXME: implement cast (long & FP) to bool
BMI(BB, IP, X86::CMPri8, 2).addReg(SrcReg).addZImm(0);
switch (SrcClass) {
case cByte:
BMI(BB, IP, X86::TESTrr8, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cShort:
BMI(BB, IP, X86::TESTrr16, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cInt:
BMI(BB, IP, X86::TESTrr32, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cLong: {
unsigned TmpReg = makeAnotherReg(Type::IntTy);
BMI(BB, IP, X86::ORrr32, 2, TmpReg).addReg(SrcReg).addReg(SrcReg+1);
break;
}
case cFP:
assert(0 && "FIXME: implement cast FP to bool");
abort();
}
// If the zero flag is not set, then the value is true, set the byte to
// true.
BMI(BB, IP, X86::SETNEr, 1, DestReg);
return;
}

26
lib/Target/X86/X86ISelSimple.cpp
View File

@ -1552,10 +1552,28 @@ void ISel::emitCastOperation(MachineBasicBlock *BB,
// Implement casts to bool by using compare on the operand followed by set if
// not zero on the result.
if (DestTy == Type::BoolTy) {
if (SrcClass == cFP || SrcClass == cLong)
abort(); // FIXME: implement cast (long & FP) to bool
BMI(BB, IP, X86::CMPri8, 2).addReg(SrcReg).addZImm(0);
switch (SrcClass) {
case cByte:
BMI(BB, IP, X86::TESTrr8, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cShort:
BMI(BB, IP, X86::TESTrr16, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cInt:
BMI(BB, IP, X86::TESTrr32, 2).addReg(SrcReg).addReg(SrcReg);
break;
case cLong: {
unsigned TmpReg = makeAnotherReg(Type::IntTy);
BMI(BB, IP, X86::ORrr32, 2, TmpReg).addReg(SrcReg).addReg(SrcReg+1);
break;
}
case cFP:
assert(0 && "FIXME: implement cast FP to bool");
abort();
}
// If the zero flag is not set, then the value is true, set the byte to
// true.
BMI(BB, IP, X86::SETNEr, 1, DestReg);
return;
}