Update.
[glibc.git] / sysdeps / libm-ieee754 / w_expl.c
blobb8152cea6536fd60d9bb272617bb5f5a1b7603f5
1 /* w_expl.c -- long double version of w_exp.c.
2 * Conversion to long double by Ulrich Drepper,
3 * Cygnus Support, drepper@cygnus.com.
4 */
6 /*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
17 #if defined(LIBM_SCCS) && !defined(lint)
18 static char rcsid[] = "$NetBSD: $";
19 #endif
22 * wrapper expl(x)
25 #include "math.h"
26 #include "math_private.h"
28 #ifdef __STDC__
29 static const long double
30 #else
31 static long double
32 #endif
33 o_threshold= 1.135652340629414394949193107797076489134e4,
34 /* 0x400C, 0xB17217F7, 0xD1CF79AC */
35 u_threshold= -1.140019167866942050398521670162263001513e4;
36 /* 0x400C, 0xB220C447, 0x69C201E8 */
38 #ifdef __STDC__
39 long double __expl(long double x) /* wrapper exp */
40 #else
41 long double __expl(x) /* wrapper exp */
42 long double x;
43 #endif
45 #ifdef _IEEE_LIBM
46 return __ieee754_expl(x);
47 #else
48 long double z;
49 z = __ieee754_expl(x);
50 if(_LIB_VERSION == _IEEE_) return z;
51 if(__finitel(x)) {
52 if(x>o_threshold)
53 return __kernel_standard(x,x,206); /* exp overflow */
54 else if(x<u_threshold)
55 return __kernel_standard(x,x,207); /* exp underflow */
57 return z;
58 #endif
60 weak_alias (__expl, expl)