Displaying 2 results from an estimated 2 matches for "unpckh_undef".
2010 Sep 21
0
[LLVMdev] LLVM 2.8 and MMX
...tted for it
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This one maybe caused the MMX regression?
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r112806 | bruno | 2010-09-01 22:23:12 -0700 (Wed, 01 Sep 2010) | 1 line
Replace unpckl_undef and unpckh_undef matching with target specific opcodes
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If you can narrow it down, file a bug report, and if it doesn't cause a regression from 2.7 in other areas of the compiler, then we can make a determination on whether to remove the o...
2010 Sep 08
8
[LLVMdev] LLVM 2.8 and MMX
On Wed, Sep 8, 2010 at 12:35 AM, Nicolas Capens
<nicolas.capens at gmail.com> wrote:
> Hi Chris,
>
> It's not broken, but the performance is crippled.
>
> I noticed that the code still contains some MMX instructions, but several
> operations get expanded (apparently swizzling and such get expanded to a
> large number of byte moves).
I think some changes related to