Annotation of src/lib/libm/src/w_atan2f.c, Revision 1.4
1.1 jtc 1: /* w_atan2f.c -- float version of w_atan2.c.
2: * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3: */
4:
5: /*
6: * ====================================================
7: * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8: *
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: * ====================================================
14: */
15:
1.4 ! lukem 16: #include <sys/cdefs.h>
1.2 jtc 17: #if defined(LIBM_SCCS) && !defined(lint)
1.4 ! lukem 18: __RCSID("$NetBSD$");
1.1 jtc 19: #endif
20:
21: /*
22: * wrapper atan2f(y,x)
23: */
24:
25: #include "math.h"
26: #include "math_private.h"
27:
28:
29: #ifdef __STDC__
30: float atan2f(float y, float x) /* wrapper atan2f */
31: #else
32: float atan2f(y,x) /* wrapper atan2 */
33: float y,x;
34: #endif
35: {
36: #ifdef _IEEE_LIBM
37: return __ieee754_atan2f(y,x);
38: #else
39: float z;
40: z = __ieee754_atan2f(y,x);
41: if(_LIB_VERSION == _IEEE_||isnanf(x)||isnanf(y)) return z;
42: if(x==(float)0.0&&y==(float)0.0) {
43: /* atan2f(+-0,+-0) */
44: return (float)__kernel_standard((double)y,(double)x,103);
45: } else
46: return z;
47: #endif
48: }
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