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[AArch64] Fix fastmem lha/lhax. 

When the fastmem loadstore would fail, we would disassemble a few instructions to determine if lhbrx or lhz*
This was failing since I was checking the REV16 instruction that appears after the LDRH. Fixed it to make sure it was checking the correct instruction
which is SXTH.

Fixes an issue where homebrew wouldn't load with fastmem enabled.
This commit is contained in:
Ryan Houdek 2015-02-22 22:58:10 -06:00
parent 593563e16c
commit 859eeb6d5b
1 changed files with 9 additions and 3 deletions
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12
Source/Core/Core/PowerPC/JitArm64/JitArm64_BackPatch.cpp
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@ -101,10 +101,16 @@ bool JitArm64::DisasmLoadStore(const u8* ptr, u32* flags, ARM64Reg* reg)
{
*flags |= BackPatchInfo::FLAG_LOAD;
*reg = (ARM64Reg)(inst & 0x1F);
if ((next_inst & 0x7FFFF000) != 0x5AC00000) // REV
if ((next_inst & 0x7FFFF000) == 0x5AC00000) // REV
{
u32 sxth_inst = *(u32*)(ptr + 8);
if ((sxth_inst & 0x7F800000) == 0x13000000) // SXTH
*flags |= BackPatchInfo::FLAG_EXTEND;
}
else
{
*flags |= BackPatchInfo::FLAG_REVERSE;
if ((next_inst & 0x7F800000) == 0x13000000) // SXTH
*flags |= BackPatchInfo::FLAG_EXTEND;
}
return true;
}
else if (op == 0xE4) // Store