> Is SSE(2) inherently faster then (at least in real-world implementations) than > x87, even when you don't vectorize? Would I be able to expect any speedup > from > going from x87 to SSE(2) for code that has a decent amount of implicit > instruction > level parallelism but wasn't explicitly vectorized either by me or the > compiler?
There is a couple of interesting scalar instructions in SSE - cvttss2si : floorf without modifying the rounding mode (SSE2) - 32-bit float square root and inverse square root - min, max SSE doesn't suffer from denormalization which can be very useful. I personnally don't mind if the compiler use them or not, provided one can use inline assembly :)
