于 2012/2/10 13:52, Miles Bader 写道:
If you switch to using SSE floating-point, e.g. using "-mfpmath=sse", it will still call the library functions even when using -ffast-math (because the SSE unit doesn't have special instructions like "fsin" or "f2xm1"). I think SSE FP is typically faster than the 387 for many CPUs anyway.
Well, that's right. But in my experience, -mfpmath=sse will slow my code very much. I think -mfpmath=sse option has some bugs on X86. -- Best Regards, xunxun
