[llvm-commits] [llvm] r140332 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp lib/Target/X86/X86ISelLowering.h lib/Target/X86/X86InstrFragmentsSIMD.td lib/Target/X86/X86InstrSSE.td test/CodeGen/X86/haddsub.ll

[Chris Lattner]

Thanks!  So many minuses! :)

-Chris

On Sep 23, 2011, at 9:16 AM, Duncan Sands wrote:

> Hi Chris,
> 
>>> Synthesize SSE3/AVX 128 bit horizontal add/sub instructions from
>>> floating point add/sub of appropriate shuffle vectors.  Does not
>>> synthesize the 256 bit AVX versions because they work differently.
>> 
>> Very cool Duncan.  Would it make sense to legalize the intrinsics for these into the X86ISD nodes to avoid the duplicate patterns?
> 
> good idea!  I implemented this in commit 140383.
> 
> Ciao, Duncan.