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2014 Dec 24
2
[LLVMdev] X86 disassembler is quite broken on handling REX
On Wed, Dec 24, 2014 at 2:43 PM, Craig Topper <craig.topper at gmail.com>
wrote:
> I believe this particular error is caused by this. That seems easy enough
> to just drop the bit. Do you have other non-mmx examples?
>
> case TYPE_MM: \
> if (index > 7) \
> *valid = 0; \
> return prefix##_MM0 + index;
>
yes, exactly this place. but the question is: how do we know when to drop
the...
2014 Dec 24
2
[LLVMdev] X86 disassembler is quite broken on handling REX
hi,
i think the current X86 disassembler is quite broken and fails badly on
handling REX for x86_64 code.
below are some examples:
$ echo "0x0f,0xeb,0xc3"|./Release+Asserts/bin/llvm-mc -disassemble
-triple=x86_64
.text
por %mm3, %mm0
$ echo "0x40,0x0f,0xeb,0xc3"|./Release+Asserts/bin/llvm-mc -disassemble
-triple=x86_64
.text
por %mm3, %mm0
$ echo