Add static dispatch macros #318
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This still needs a bit of work, but I wanted to get some feedback before proceeding further. I haven't even tried building it for anything other than x86, and I haven't tried using the macros yet.
There are a few features that I'm not sure what to test for because I'm not sure what SLEEF is really looking at. Specifically, the tests for FMA… I guess for x86 that means the FMA4 ISA extension, but what about for other architectures? Should I just be looking at
__FP_FAST_FMA__/__FP_FAST_FMAF__, or is there something else?Overall, does this seem like the right approach to you?