50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* w_atanhf.c -- float version of w_atanh.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <sys/cdefs.h>
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: w_atanhf.c,v 1.6 2002/05/26 22:02:00 wiz Exp $");
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#endif
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/*
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* wrapper atanhf(x)
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*/
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#include "math.h"
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#include "math_private.h"
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float
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atanhf(float x) /* wrapper atanhf */
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{
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#ifdef _IEEE_LIBM
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return __ieee754_atanhf(x);
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#else
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float z,y;
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z = __ieee754_atanhf(x);
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if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
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y = fabsf(x);
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if(y>=(float)1.0) {
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if(y>(float)1.0)
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/* atanhf(|x|>1) */
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return (float)__kernel_standard((double)x,(double)x,130);
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else
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/* atanhf(|x|==1) */
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return (float)__kernel_standard((double)x,(double)x,131);
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} else
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return z;
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#endif
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}
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