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x86instrfma
2010 Sep 08
4
[LLVMdev] MMX vs SSE
I'm working on changing the MMX implementation to use intrinsics in
all cases, which should stop various optimization passes from creating
MMX instructions that screw up the x87 stack. Right now the MMX
instructions are split between X86InstrMMX.td and X86InstrSSE.td,
presumably on the historical grounds that some of them weren't
introduced until SSE or SSSE3, and require support for that feature to
work. I'm thinking it would be cleaner to keep them all in
X86InstrMMX. Does anyone have an opinion about this?
2014 Apr 16
2
[LLVMdev] X86 mmx movq disassembler fail
0x0f 0x6f 0xc8
And
0x0f 0x7f 0xc1
Should both be movq % mm0, % mm1. (AT&T)
However, llvm 3.4 at least does not recognise the second variant as being a
valid instruction.
We are currently compiling up latest src incase it has been fixed. If not,
could someone take a look or recommend how to fix?
Lee
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