It may make a difference with Ada. I'll start running ACATS, the Ada compiler 
validation suite, with -mfpmath=sse -msse and see if it passes.

On Monday 19 April 2004 01:10 pm, Matthias Drochner wrote:
> Hi -
> using sse2 math instead of i387 gives a significant speedup on
> pentium4, and probably using sse on p3/athlon is useful too
> as long as single precision is sufficient.
> (gcc emits sse code with -mfpmath=sse -msse[2])
>
> While the kernel should be OK is this respect, the libc functions
> dealing with exceptions (fp{get,set}{round,sticky,mask}) don't care
> about the sse status.
> These functions are rarely used, but some serious number crunching
> software might do so. Do you know of any where this would be a problem?
>
> The standardization status of the fp* functions is somewhat unclear to
> me - it seems they are of sysV heritage, but I didn't find a mention
> in susV3.
> C99 has some equivalent functions named fe* which are appearently not
> in common use yet. (implemented in glibc afaics)
> Any background information, someone?
>
> And, while we are here, does anyone have an idea why fabs() is
> implemented in libc (rather than libm) in NetBSD?
>
> best regards
> Matthias

-- 

John R. Shannon
john@johnrshannon.com