diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/s_isinfl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_isinfl.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_isinfl.c b/sysdeps/ieee754/ldbl-128/s_isinfl.c new file mode 100644 index 0000000000..038c294c79 --- /dev/null +++ b/sysdeps/ieee754/ldbl-128/s_isinfl.c @@ -0,0 +1,28 @@ +/* + * Written by J.T. Conklin <jtc@netbsd.org>. + * Change for long double by Jakub Jelinek <jj@ultra.linux.cz> + * Public domain. + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +/* + * isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0; + * no branching! + */ + +#include "math.h" +#include "math_private.h" + +int +__isinfl (long double x) +{ + int64_t hx,lx; + GET_LDOUBLE_WORDS64(hx,lx,x); + lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL; + lx |= -lx; + return ~(lx >> 63) & (hx >> 62); +} +weak_alias (__isinfl, isinfl) |