[Ffmpeg-cvslog] r8474 - trunk/libavcodec/resample2.c

[Uoti Urpala]

On Thu, 2007-03-22 at 12:33 -0500, Rich Felker wrote:
> On Thu, Mar 22, 2007 at 06:39:16PM +0200, Uoti Urpala wrote:
> > That's because you used floats but gcc kept the variables in FPU
> > registers. Try it with long doubles or use -ffloat-store.
> 
> Won't help. All floating point expressions are actually double or
> larger in C. You'll need to explicitly cast to (float) after the
> multiplications to avoid it.

Not true. The type of float*float is float. gcc does generate inf as the
result of FLT_MAX*FLT_MAX on x86 too if you use -ffloat-store (the
standard does allow the gcc default of using more precision/range than
required by the type of the result - of course the standard allows
pretty much anything for floating point).

Also this of course isn't relevant at all to my other alternative
suggestion (doing the equivalent test with long double).