diff options
| author | Nate Begeman <natebegeman@mac.com> | 2005-04-06 22:42:08 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2005-04-06 22:42:08 +0000 |
| commit | 020ef42c19bd1e2e7dff202d98e2f71091e76178 (patch) | |
| tree | 3a042b183d4b3420dc6324276bb541cac9cfe0c0 /lib/Target/PowerPC/PPC32ISelSimple.cpp | |
| parent | aeca5587881bbdc03eb95a82eb2d062b35f61119 (diff) | |
Fix some shift bugs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21126 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPC32ISelSimple.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPC32ISelSimple.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp index 80c554c824..4a318b259b 100644 --- a/lib/Target/PowerPC/PPC32ISelSimple.cpp +++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp @@ -2779,8 +2779,13 @@ 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); - BuildMI(*MBB, IP, PPC::RLWINM, 4, DestReg).addReg(SrcReg) - .addImm(32-Amount).addImm(Amount).addImm(31); + 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; @@ -2805,7 +2810,11 @@ void PPC32ISel::emitShiftOperation(MachineBasicBlock *MBB, BuildMI(*MBB, IP, PPC::OR, 2, DestReg+1).addReg(SrcReg) .addReg(SrcReg); } - BuildMI(*MBB, IP,PPC::LI, 1, DestReg).addSImm(0); + if (isSigned) + BuildMI(*MBB, IP, PPC::SRAWI, 2, DestReg).addReg(SrcReg) + .addImm(31); + else + BuildMI(*MBB, IP,PPC::LI, 1, DestReg).addSImm(0); } } } else { |