question: prefer SSE over x87 asm code?

[Don]

dennis luehring wrote:
> hello all,
> 
> i've read that on newer architectures
> SSE code should be prefered over x87 - because of speed
> and i saw masses of SSE code in the math stuff of microsoft and intel 
> compiler generated code

At the present time, SSE and x87 are the same speed in most cases (most 
operations take just one cycle) -- except of course that you can do two 
or four operations at once with SSE.

> 
> i know that the current fpu/sse support of DMD isn't that good, but are
> there any attemps to use SSE code insinde of std.math implementation
> wouldn't give SSE better results here (beside that someone needs to 
> implement it)?
> 
> just as a question

Not for 32-bit. Even the last AMD 32-bit processors didn't support SSE2.
For 64-bit, it makes sense, since all x86-64 processors can do SSE2. It 
will definitely happen for 64.