📄 sf_isnan.c
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/* sf_isnan.c -- float version of s_isnan.c. * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. *//* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== *//* * isnanf(x) returns 1 is x is nan, else 0; * no branching! */#include "fdlibm.h"#ifdef __STDC__ int isnanf(float x)#else int isnanf(x) float x;#endif{ __int32_t ix; GET_FLOAT_WORD(ix,x); ix &= 0x7fffffff; ix = 0x7f800000 - ix; return (int)(((__uint32_t)(ix))>>31);}
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