From 4536fcd57b88828065e312c02f0fd2cd5e5f6b7a Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 1 Jun 2003 03:38:24 +0000 Subject: [PATCH] * Implement cast (long|ulong) to bool * Fix cast of (short|ushort|int|uint) to bool to work right llvm-svn: 6510 --- llvm/lib/Target/X86/InstSelectSimple.cpp | 26 ++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/llvm/lib/Target/X86/InstSelectSimple.cpp b/llvm/lib/Target/X86/InstSelectSimple.cpp index c62e68da270d..3479b73d20e7 100644 --- a/llvm/lib/Target/X86/InstSelectSimple.cpp +++ b/llvm/lib/Target/X86/InstSelectSimple.cpp @@ -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; }