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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libm/] [math/] [wf_sqrt.c] - Rev 148
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/* wf_sqrt.c -- float version of w_sqrt.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. * ==================================================== */ /* * wrapper sqrtf(x) */ #include "fdlibm.h" #include <errno.h> #ifdef __STDC__ float sqrtf(float x) /* wrapper sqrtf */ #else float sqrtf(x) /* wrapper sqrtf */ float x; #endif { #ifdef _IEEE_LIBM return __ieee754_sqrtf(x); #else float z; struct exception exc; z = __ieee754_sqrtf(x); if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; if(x<(float)0.0) { /* sqrtf(negative) */ exc.type = DOMAIN; exc.name = "sqrtf"; exc.err = 0; exc.arg1 = exc.arg2 = (double)x; if (_LIB_VERSION == _SVID_) exc.retval = 0.0; else exc.retval = 0.0/0.0; if (_LIB_VERSION == _POSIX_) errno = EDOM; else if (!matherr(&exc)) { errno = EDOM; } if (exc.err != 0) errno = exc.err; return (float)exc.retval; } else return z; #endif } #ifdef _DOUBLE_IS_32BITS #ifdef __STDC__ double sqrt(double x) #else double sqrt(x) double x; #endif { return (double) sqrtf((float) x); } #endif /* defined(_DOUBLE_IS_32BITS) */
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