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ARM fix encoding fixup resolution for ldrd and friends. 

The 8-bit payload is not contiguous in the opcode. Move the upper nibble
over 4 bits into the correct place.

rdar://11158641

llvm-svn: 153780
This commit is contained in:
Jim Grosbach 2012-03-30 21:54:22 +00:00
parent 185f2edd70
commit 913cc3072d
1 changed files with 2 additions and 0 deletions
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2
llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
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@ -469,7 +469,9 @@ static unsigned adjustFixupValue(unsigned Kind, uint64_t Value) {
Value = -Value; Value = -Value;
isAdd = false; isAdd = false;
} }
// The value has the low 4 bits encoded in [3:0] and the high 4 in [11:8].
assert ((Value < 256) && "Out of range pc-relative fixup value!"); assert ((Value < 256) && "Out of range pc-relative fixup value!");
Value = (Value & 0xf) | ((Value & 0xf0) << 4);
return Value | (isAdd << 23); return Value | (isAdd << 23);
} }
case ARM::fixup_arm_pcrel_10: case ARM::fixup_arm_pcrel_10: