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Fix encoding of 'U' bit for Thumb2 STRD/LDRD instructions. rdar://8755726 

llvm-svn: 121524
This commit is contained in:
Jim Grosbach 2010-12-10 21:05:07 +00:00
parent e991a6ee5a
commit e69f724935
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/Target/ARM/ARMMCCodeEmitter.cpp
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@ -552,9 +552,9 @@ getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx,
uint32_t ARMMCCodeEmitter::
getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
SmallVectorImpl<MCFixup> &Fixups) const {
// {17-13} = reg
// {12} = (U)nsigned (add == '1', sub == '0')
// {11-0} = imm8
// {12-9} = reg
// {8} = (U)nsigned (add == '1', sub == '0')
// {7-0} = imm8
unsigned Reg, Imm8;
bool isAdd = true;
// If The first operand isn't a register, we have a label reference.
@ -576,7 +576,7 @@ getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx,
uint32_t Binary = (Imm8 >> 2) & 0xff;
// Immediate is always encoded as positive. The 'U' bit controls add vs sub.
if (isAdd)
Binary |= (1 << 9);
Binary |= (1 << 8);
Binary |= (Reg << 9);
return Binary;
}