diff options
author | Christopher Faylor <cgf@redhat.com> | 2000-02-17 19:39:46 +0000 |
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committer | Christopher Faylor <cgf@redhat.com> | 2000-02-17 19:39:46 +0000 |
commit | 6d491d8ad9122891d1a48447e8c49702eb678921 (patch) | |
tree | 45619a131b9f211ceca9fce7a866328344bf00ec /newlib/libm/mathfp/sf_isinf.c | |
parent | bd592806f45307757c24ec3f75bdefe13abfd51f (diff) | |
download | gdb-cvs/SNAPSHOT.tar.gz |
import newlib-2000-02-17 snapshotcvs/SNAPSHOT
Diffstat (limited to 'newlib/libm/mathfp/sf_isinf.c')
-rw-r--r-- | newlib/libm/mathfp/sf_isinf.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/newlib/libm/mathfp/sf_isinf.c b/newlib/libm/mathfp/sf_isinf.c new file mode 100644 index 00000000000..5d537607abb --- /dev/null +++ b/newlib/libm/mathfp/sf_isinf.c @@ -0,0 +1,33 @@ + +/* @(#)z_isinff.c 1.0 98/08/13 */ +/****************************************************************** + * isinff + * + * 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" + +int isinff (float x) +{ + __uint32_t wx; + int exp; + + GET_FLOAT_WORD (wx, x); + exp = (wx & 0x7f800000) >> 23; + + if ((exp == 0x7f8) && !(wx & 0xf0000)) + return (1); + else + return (0); +} |