diff options
author | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
commit | 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc (patch) | |
tree | 68c3dbf3f2c6fd5d49777def9914d77b5cd4589d /newlib/libm/mathfp/sf_isnan.c | |
parent | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (diff) |
import newlib-2000-02-17 snapshot
Diffstat (limited to 'newlib/libm/mathfp/sf_isnan.c')
-rw-r--r-- | newlib/libm/mathfp/sf_isnan.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/newlib/libm/mathfp/sf_isnan.c b/newlib/libm/mathfp/sf_isnan.c new file mode 100644 index 000000000..3dcdbf452 --- /dev/null +++ b/newlib/libm/mathfp/sf_isnan.c @@ -0,0 +1,33 @@ + +/* @(#)z_isnanf.c 1.0 98/08/13 */ +/****************************************************************** + * isnanf + * + * Input: + * x - pointer to a floating point value + * + * Output: + * An integer that indicates if the number is NaN. + * + * Description: + * This routine returns an integer that indicates if the number + * passed in is NaN (1) or is finite (0). + * + *****************************************************************/ + +#include "fdlibm.h" +#include "zmath.h" + +int isnanf (float x) +{ + __int32_t wx; + int exp; + + GET_FLOAT_WORD (wx, x); + exp = (wx & 0x7f800000) >> 23; + + if ((exp == 0x7f8) && (wx & 0x7fffff)) + return (1); + else + return (0); +} |