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glibc  2.9
w_atan2l.c
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00001 /* w_atan2l.c -- long double version of w_atan2.c.
00002  * Conversion to long double by Ulrich Drepper,
00003  * Cygnus Support, drepper@cygnus.com.
00004  */
00005 
00006 /*
00007  * ====================================================
00008  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
00009  *
00010  * Developed at SunPro, a Sun Microsystems, Inc. business.
00011  * Permission to use, copy, modify, and distribute this
00012  * software is freely granted, provided that this notice
00013  * is preserved.
00014  * ====================================================
00015  */
00016 
00017 #if defined(LIBM_SCCS) && !defined(lint)
00018 static char rcsid[] = "$NetBSD: $";
00019 #endif
00020 
00021 /*
00022  * wrapper atan2l(y,x)
00023  */
00024 
00025 #include <math.h>
00026 #include "math_private.h"
00027 
00028 
00029 #ifdef __STDC__
00030        long double __atan2l(long double y, long double x) /* wrapper atan2l */
00031 #else
00032        long double __atan2l(y,x)                 /* wrapper atan2l */
00033        long double y,x;
00034 #endif
00035 {
00036 #ifdef _IEEE_LIBM
00037        return __ieee754_atan2l(y,x);
00038 #else
00039        long double z;
00040        z = __ieee754_atan2l(y,x);
00041        if(_LIB_VERSION != _SVID_||__isnanl(x)||__isnanl(y)) return z;
00042        if(x==0.0&&y==0.0)
00043          return __kernel_standard(y,x,203); /* atan2(+-0,+-0) */
00044        return z;
00045 #endif
00046 }
00047 weak_alias (__atan2l, atan2l)