Architecture floating-point underflow information wanted

[Andreas Schwab]

"Joseph S. Myers" <joseph@codesourcery.com> writes:

> #include <fenv.h>
> #include <stdio.h>
>
> volatile float a = 0x1.fffp-126;
> volatile float b = 0x1.0008p-1;
> volatile float c;
>
> int
> main (void)
> {
>   feclearexcept (FE_ALL_EXCEPT);
>   c = a * b;
>   if (fetestexcept (FE_UNDERFLOW))

Does this really give the correct result for FLT_EVAL_METHOD != 0?  I
think for those archs you have to set the rounding mode to float to be
accurate.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."