------- Comment #7 from ubizjak at gmail dot com 2007-10-19 17:53 ------- (In reply to comment #6) > It is little bit sick, but what about implying -mfpmath=sse when > -ftree-vectorize is used and SSE is available?
Then you will hit Core2 Duo, that shows the opposite in 32bit and 64bit mode: -O3 -ffast-math -ftree-vectorize -funroll-loops -msse3 -m32 -mfpmath=387 user 0m22.785s -O3 -ffast-math -ftree-vectorize -funroll-loops -msse3 -m32 -mfpmath=sse user 0.27.886s -O3 -ffast-math -ftree-vectorize -funroll-loops -msse3 -m64 -mfpmath=387 user 0m20.473s -O3 -ffast-math -ftree-vectorize -funroll-loops -msse3 -m64 -mfpmath=sse user 0.25.046s -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31897
