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Compilers flags
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From: |
CdeMills |
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Subject: |
Compilers flags |
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Date: |
Fri, 14 Jan 2011 07:18:18 -0800 (PST) |
Hello,
Web pages about High Performance Computing mention gcc flag -ftree-vectorize
as a performance gain by vectorizing loops. I compiled a version from hg
tip, configured as
env CFLAGS="-O3 -ftree-vectorize" CXXFLAGS="-O3 -ftree-vectorize"
FFLAGS="-O3 -ftree-vectorize" ../configure --prefix=$HOME/usr
--enable-strict-warning-flags
[In most architectures except Power, -ftree-vectorize is implicitelly
available in -O3 ]
The tests done on this version were all successfull. Are there some kind of
benchmarks to quantify the speed gain ?
Regards
Pascal
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