5980be9b3c
This work is based in part on code from NetBSD libm, libc and kernel. The library is partly public domain and partly BSD-style licensed.
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* w_atan2f.c -- float version of w_atan2.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_atan2f.c,v 1.7 2007/08/10 21:20:36 drochner Exp $");
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#endif
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/*
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* wrapper atan2f(y,x)
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*/
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#include "namespace.h"
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#include "math.h"
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#include "math_private.h"
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#ifdef __weak_alias
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__weak_alias(atan2f, _atan2f)
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#endif
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float
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atan2f(float y, float x) /* wrapper atan2f */
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{
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#ifdef _IEEE_LIBM
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return __ieee754_atan2f(y,x);
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#else
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float z;
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z = __ieee754_atan2f(y,x);
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if(_LIB_VERSION == _IEEE_||isnanf(x)||isnanf(y)) return z;
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if(x==(float)0.0&&y==(float)0.0) {
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/* atan2f(+-0,+-0) */
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return (float)__kernel_standard((double)y,(double)x,103);
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} else
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return z;
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#endif
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}
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