Displaying 2 results from an estimated 2 matches for "hsubpd".
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2011 Sep 21
2
[LLVMdev] Patch to synthesize x86 hadd instructions; need help with the tablegen bits
This patch synthesizes haddps/haddpd/hsubps/hsubpd instructions from floating
point additions and subtractions of appropriate vector shuffles. To do this I
introduced new x86 FHADD and FHSUB opcodes. These need to be wired up somehow
in the .td file to the appropriate instructions. Since I have no idea how
tablegen works I just hacked it in horr...
2011 Sep 21
0
[LLVMdev] Patch to synthesize x86 hadd instructions; need help with the tablegen bits
Hi Duncan,
On Wed, Sep 21, 2011 at 1:24 PM, Duncan Sands <baldrick at free.fr> wrote:
> This patch synthesizes haddps/haddpd/hsubps/hsubpd instructions from
> floating
> point additions and subtractions of appropriate vector shuffles. To do this
> I
> introduced new x86 FHADD and FHSUB opcodes. These need to be wired up
> somehow
> in the .td file to the appropriate instructions. Since I have no idea how
> tabl...