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Packed-simd SSE for only vectorized loops
- From: Fahimeh Yazdanpanah <fahim_yazdan at yahoo dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Sat, 31 Oct 2009 04:04:59 -0700 (PDT)
- Subject: Packed-simd SSE for only vectorized loops
Hello,
I am working on autovectorization. Using gcc-4.3.3, 64-bit Ubuntu on an intel core2, and vectorization flags, I found that gcc produces packed-simd SSE opcodes for all instructions in vectorized loops and for some instructions in non-vectorized loops.
Would you please let me know if there a flag or switch to disable gcc producing packed-simd instructions for non-vectorized loops? Or is there any way to distinguish between the packed-simd SSE instructions within vectorized loop and within non-vectorized loops?
Thanks a lot,
Fahimeh