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Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_isinf.c')
-rw-r--r--sysdeps/ieee754/dbl-64/s_isinf.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_isinf.c b/sysdeps/ieee754/dbl-64/s_isinf.c
index 93eb65c1479..e5300fd2a55 100644
--- a/sysdeps/ieee754/dbl-64/s_isinf.c
+++ b/sysdeps/ieee754/dbl-64/s_isinf.c
@@ -4,10 +4,6 @@
* Public domain.
*/
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
-#endif
-
/*
* isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
* no branching!
@@ -21,11 +17,12 @@ static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
int
__isinf (double x)
{
- int32_t hx, lx;
- EXTRACT_WORDS (hx, lx, x);
- lx |= (hx & 0x7fffffff) ^ 0x7ff00000;
- lx |= -lx;
- return ~(lx >> 31) & (hx >> 30);
+ int64_t ix;
+ EXTRACT_WORDS64 (ix,x);
+ int64_t t = ix & UINT64_C (0x7fffffffffffffff);
+ t ^= UINT64_C (0x7ff0000000000000);
+ t |= -t;
+ return ~(t >> 63) & (ix >> 62);
}
hidden_def (__isinf)
weak_alias (__isinf, isinf)