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Check for NaN and set error accordingly

svn path=/trunk/; revision=54447
This commit is contained in:
Pierre Schweitzer 2011-11-19 19:01:58 +00:00
parent ada492283a
commit 7d1620fa34
1 changed files with 21 additions and 10 deletions
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31
reactos/lib/sdk/crt/math/i386/ldexp.c
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@ -19,11 +19,22 @@
Boston, MA 02110-1301, USA.
*/
#include <precomp.h>
#include <math.h>
#include <float.h>
double ldexp (double value, int exp)
{
register double result;
/* Check for value correctness
* and set errno if required
*/
if (_isnan(value))
{
errno = EDOM;
}
#ifdef __GNUC__
#if defined(__clang__)
asm ("fild %[exp]\n"
@ -33,20 +44,20 @@ double ldexp (double value, int exp)
: [value] "0" (value), [exp] "m" (exp));
#else
asm ("fscale"
: "=t" (result)
: "=t" (result)
: "0" (value), "u" ((double)exp)
: "1");
#endif
#else /* !__GNUC__ */
register double __dy = (double)exp;
__asm
{
fld __dy
fld value
fscale
fstp result
}
register double __dy = (double)exp;
__asm
{
fld __dy
fld value
fscale
fstp result
}
#endif /* !__GNUC__ */
return result;
return result;
}