1 /* @(#)w_exp.c 5.1 93/09/24 */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
10 * ====================================================
12 * $FreeBSD: src/lib/msun/src/w_exp.c,v 1.5 1999/08/28 00:07:00 peter Exp $
13 * $DragonFly: src/lib/msun/src/Attic/w_exp.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
21 #include "math_private.h"
28 o_threshold= 7.09782712893383973096e+02, /* 0x40862E42, 0xFEFA39EF */
29 u_threshold= -7.45133219101941108420e+02; /* 0xc0874910, 0xD52D3051 */
32 double exp(double x) /* wrapper exp */
34 double exp(x) /* wrapper exp */
39 return __ieee754_exp(x);
43 if(_LIB_VERSION == _IEEE_) return z;
46 return __kernel_standard(x,x,6); /* exp overflow */
47 else if(x<u_threshold)
48 return __kernel_standard(x,x,7); /* exp underflow */