Unroll 32bit SSE strlen and handle slow bsf
[glibc.git] / math / w_atan2f.c
blobefb08f076bff698c1c9239c3fdde67850f803a68
1 /* w_atan2f.c -- float version of w_atan2.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
5 /*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
16 #if defined(LIBM_SCCS) && !defined(lint)
17 static char rcsid[] = "$NetBSD: w_atan2f.c,v 1.3 1995/05/10 20:48:42 jtc Exp $";
18 #endif
21 * wrapper atan2f(y,x)
24 #include <math.h>
25 #include "math_private.h"
28 #ifdef __STDC__
29 float __atan2f(float y, float x) /* wrapper atan2f */
30 #else
31 float __atan2f(y,x) /* wrapper atan2 */
32 float y,x;
33 #endif
35 #ifdef _IEEE_LIBM
36 return __ieee754_atan2f(y,x);
37 #else
38 float z;
39 z = __ieee754_atan2f(y,x);
40 if(_LIB_VERSION != _SVID_||__isnanf(x)||__isnanf(y)) return z;
41 if(x==0.0&&y==0.0)
42 return __kernel_standard(y,x,103); /* atan2(+-0,+-0) */
43 return z;
44 #endif
46 weak_alias (__atan2f, atan2f)