From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001 From: PikalaxALT Date: Fri, 15 Dec 2017 09:38:53 -0500 Subject: Import newlib and create makefile --- newlib/libm/mathfp/sf_isnan.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 newlib/libm/mathfp/sf_isnan.c (limited to 'newlib/libm/mathfp/sf_isnan.c') diff --git a/newlib/libm/mathfp/sf_isnan.c b/newlib/libm/mathfp/sf_isnan.c new file mode 100644 index 0000000..3dcdbf4 --- /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); +} -- cgit v1.2.3