On 05/08/18 07:06, Joerg Sonnenberger wrote:
On Mon, May 07, 2018 at 08:33:54PM -0500, Jason Bacon wrote:By adding -mfpmath=sse -msse3. The cpuflags command has so far given me the same output on every machine I've tried. I've run a few benchmarks using plink and so far have not seen any measurable difference between -march=native and -mfpmath=sse -msse3 -march=native.It can make a difference on i386, but not necessarily a positive one. It is useless on x86_64. Joerg
That would make sense. Most i386 compilers have SSE off by default in my experience. I've had to force it on in a few cases to get code with embedded SSE instructions to build.