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Fix some shift bugs 

llvm-svn: 21126
This commit is contained in:
Nate Begeman 2005-04-06 22:42:08 +00:00
parent 7ca0947274
commit 505f6b760d
1 changed files with 12 additions and 3 deletions
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9
llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp
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@ -2779,9 +2779,14 @@ void PPC32ISel::emitShiftOperation(MachineBasicBlock *MBB,
.addImm(32-Amount).addImm(Amount).addImm(31);
BuildMI(*MBB, IP, PPC::RLWIMI, 5, DestReg+1).addReg(TempReg)
.addReg(SrcReg).addImm(32-Amount).addImm(0).addImm(Amount-1);
if (isSigned) {
BuildMI(*MBB, IP, PPC::SRAWI, 2, DestReg).addReg(SrcReg)
.addImm(Amount);
} else {
BuildMI(*MBB, IP, PPC::RLWINM, 4, DestReg).addReg(SrcReg)
.addImm(32-Amount).addImm(Amount).addImm(31);
}
}
} else { // Shifting more than 32 bits
Amount -= 32;
if (isLeftShift) {
@ -2805,6 +2810,10 @@ void PPC32ISel::emitShiftOperation(MachineBasicBlock *MBB,
BuildMI(*MBB, IP, PPC::OR, 2, DestReg+1).addReg(SrcReg)
.addReg(SrcReg);
}
if (isSigned)
BuildMI(*MBB, IP, PPC::SRAWI, 2, DestReg).addReg(SrcReg)
.addImm(31);
else
BuildMI(*MBB, IP,PPC::LI, 1, DestReg).addSImm(0);
}
}