newlib-cygwin/winsup/cygwin/math/ldexpl.c

24 lines
547 B
C

/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <math.h>
#include <errno.h>
long double ldexpl(long double x, int expn)
{
long double res = 0.0L;
if (!isfinite (x) || x == 0.0L)
return x;
__asm__ __volatile__ ("fscale"
: "=t" (res)
: "0" (x), "u" ((long double) expn));
if (!isfinite (res) || res == 0.0L)
errno = ERANGE;
return res;
}