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git.proxmox.com Git - mirror_edk2.git/blob - StdLib/LibC/Math/w_exp.c
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 #include <LibConfig.h>
13 #include <sys/EfiCdefs.h>
14 #if defined(LIBM_SCCS) && !defined(lint)
15 __RCSID("$NetBSD: w_exp.c,v 1.9 2002/05/26 22:02:00 wiz Exp $");
23 #include "math_private.h"
26 o_threshold
= 7.09782712893383973096e+02, /* 0x40862E42, 0xFEFA39EF */
27 u_threshold
= -7.45133219101941108420e+02; /* 0xc0874910, 0xD52D3051 */
30 exp(double x
) /* wrapper exp */
33 return __ieee754_exp(x
);
37 if(_LIB_VERSION
== _IEEE_
) return z
;
40 return __kernel_standard(x
,x
,6); /* exp overflow */
41 else if(x
<u_threshold
)
42 return __kernel_standard(x
,x
,7); /* exp underflow */