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[Bug rtl-optimization/19780] Floating point computation far slower for -mfpmath=sse
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Oct 2006 12:18:23 -0000
- Subject: [Bug rtl-optimization/19780] Floating point computation far slower for -mfpmath=sse
- References: <bug-19780-1649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from uros at kss-loka dot si 2006-10-25 12:18 -------
(In reply to comment #6)
> On Xeon 3.6, SSE is now faster:
... but for -ffast-math:
SSE: user 0m0.756s
x87: user 0m0.612s
Yes, x87 is faster for -ffast-math by some 20%.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19780