From 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc Mon Sep 17 00:00:00 2001 From: Christopher Faylor Date: Thu, 17 Feb 2000 19:39:52 +0000 Subject: import newlib-2000-02-17 snapshot --- newlib/libm/mathfp/s_isinf.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 newlib/libm/mathfp/s_isinf.c (limited to 'newlib/libm/mathfp/s_isinf.c') diff --git a/newlib/libm/mathfp/s_isinf.c b/newlib/libm/mathfp/s_isinf.c new file mode 100644 index 000000000..fe9f54799 --- /dev/null +++ b/newlib/libm/mathfp/s_isinf.c @@ -0,0 +1,37 @@ + +/* @(#)z_isinf.c 1.0 98/08/13 */ +/****************************************************************** + * isinf + * + * Input: + * x - pointer to a floating point value + * + * Output: + * An integer that indicates if the number is infinite. + * + * Description: + * This routine returns an integer that indicates if the number + * passed in is infinite (1) or is finite (0). + * + *****************************************************************/ + +#include "fdlibm.h" +#include "zmath.h" + +#ifndef _DOUBLE_IS_32BITS + +int isinf (double x) +{ + __uint32_t lx, hx; + int exp; + + EXTRACT_WORDS (hx, lx, x); + exp = (hx & 0x7ff00000) >> 20; + + if ((exp == 0x7ff) && ((hx & 0xf0000 || lx) == 0)) + return (1); + else + return (0); +} + +#endif /* _DOUBLE_IS_32BITS */ -- cgit v1.2.3