[LLVMdev] MMX vs SSE
Bill Wendling
wendling at apple.com
Wed Sep 8 15:37:05 PDT 2010
On Sep 8, 2010, at 3:08 PM, Dale Johannesen wrote:
> 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?
>
I concur.
-bw
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