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| author | André Tupinambá <andrelrt@gmail.com> | 2009-09-19 09:32:37 -0400 |
|---|---|---|
| committer | Søren Sandmann Pedersen <sandmann@redhat.com> | 2009-10-26 13:04:21 -0400 |
| commit | 88323c5abe68906472049537b54b0e7eea343f43 (patch) | |
| tree | 2048231e5519690cdd31b88aebaff8541473f610 /configure.ac | |
| parent | f0c157f888185279681bad305973f246dca2e535 (diff) | |
Speed up bilinear interpolation.
Speed up bilinear interpolation by processing more than one component
at a time on 64 bit architectures, and by precomputing the dist{ixiy}
products on 32 bit architectures.
Previously bilinear interpolation for one pixel would take 24
multiplications. With this improvement it takes 12 on 64 bit, and 20
on 32 bit.
This is a small but consistent speedup on the swfdec-youtube
benchmark:
[ # ] backend test min(s) median(s) stddev. count
Before:
[ 0] image swfdec-youtube 18.010 18.020 0.09% 4/5
After:
[ 0] image swfdec-youtube 17.488 17.584 0.22% 5/6
Signed-off-by: Søren Sandmann Pedersen <sandmann@redhat.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index c3e339c8..12c7f751 100644 --- a/configure.ac +++ b/configure.ac @@ -76,6 +76,8 @@ AC_CHECK_FUNCS([getisax]) AC_C_BIGENDIAN AC_C_INLINE +AC_CHECK_SIZEOF(long) + # Checks for Sun Studio compilers AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"]) AC_CHECK_DECL([__amd64], [AMD64_ABI="yes"], [AMD64_ABI="no"]) |