On Sun, Mar 13, 2016 at 09:08:56PM +0000, Ed Maste wrote:
> On 13 March 2016 at 19:16, Steve Kargl <[email protected]>
> wrote:
> > JFYI,
> >
> > It appears that clang on up-to-date current may be
> > miscompiling libm on at i686 class hardware.
>
> Do you have an example of the suspected miscompilation?
See freebsd-toolchain@
#include <fenv.h>
#include <stdio.h>
int
main(void)
{
int i;
// float x = 1.f;
double x = 1.;
i = 0;
feclearexcept(FE_ALL_EXCEPT);
do {
x *= 2;
i++;
} while(!fetestexcept(FE_OVERFLOW));
if (fetestexcept(FE_OVERFLOW)) printf("FE_UNDERFLOW: ");
printf("x = %e after %d iterations\n", x, i);
return 0;
}
--
Steve
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