Logarithm with SSE, or switch to FPU?

Question

I\'m doing some statistics calculations. I need them to be fast, so I rewrote most of it to use SSE. I\'m pretty much new to it, so I was wondering what the right approach h

Answer 1

There seem to be a few SSE log2 implementations around, e.g. this one.

There is also the Intel Approximate Maths Library which has a log2 function among others - it's old (2000) but it's SSE2 and it should still work reasonably well.

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See also:

• sse_mathfun - SSE vector math library
• avx_mathfun - AVX vector math library
• libmvec - vector math library added in glibc 2.22