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Re: GCC Benchmarks (coybench), AMD64 and i686, 14 August 2004

Richard Henderson wrote:
You should get the same with "-msse2 -mfpmath=sse".

This is the default for the amd64 abi.

Adding -mfpmath=sse on the Pentium 4 produces an improved, but different result (one defect), as compared to compiling for AMD64 (where I see a single, less significant flaw).

BTW, -msse2 is implied by -march=pentium4.

--
Scott Robert Ladd
Coyote Gulch Productions (http://www.coyotegulch.com)
Software Invention for High-Performance Computing

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