[PATCH] Fix i386 bits/mathinline.h with -ansi -pedantic

[Jakub Jelinek]

On Mon, May 22, 2000 at 07:30:14AM -0700, Ulrich Drepper wrote:
> Jakub Jelinek <jakub@redhat.com> writes:
> 
> > +++ libc/sysdeps/i386/fpu/bits/mathinline.h	Mon May 22 16:28:00 2000
> > @@ -367,7 +367,8 @@ __sincosl (long double __x, long double 
> >      ("fscale			# 2^int(x * log2(e))\n\t"		      \
> >       : "=t" (__temp) : "0" (1.0), "u" (__exponent));			      \
> >    __temp -= 1.0;							      \
> > -  return __temp + __value ?: __x
> > +  __temp += __value;							      \
> > +  return __temp ? __temp : __x
> >  __inline_mathcodeNP_ (long double, __expm1l, __x, __expm1_code)
> 
> Your change is not preserving the semantics.  Once you corrected this
> make sure the generated code is the same.  There is no reason at all
> to make the generated worse code.

How does it change semantics?

#include <math.h>

long double a, b, c;
void foo(void)
{
        a = __expm1l(b);
}

generates identical output with -O2 with unpatched and patched
bits/mathinline.h (and similarly with -O2 -ansi -pedantic, though the output
is different from plain -O2).

	Jakub