1/*
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)mathimpl.h	8.1 (Berkeley) 6/4/93
34 */
35
36#include <math.h>
37
38#if defined(vax)||defined(tahoe)
39
40/* Deal with different ways to concatenate in cpp */
41#  ifdef __STDC__
42#    define	cat3(a,b,c) a ## b ## c
43#  else
44#    define	cat3(a,b,c) a/**/b/**/c
45#  endif
46
47/* Deal with vax/tahoe byte order issues */
48#  ifdef vax
49#    define	cat3t(a,b,c) cat3(a,b,c)
50#  else
51#    define	cat3t(a,b,c) cat3(a,c,b)
52#  endif
53
54#  define vccast(name) (*(const double *)(cat3(name,,x)))
55
56   /*
57    * Define a constant to high precision on a Vax or Tahoe.
58    *
59    * Args are the name to define, the decimal floating point value,
60    * four 16-bit chunks of the float value in hex
61    * (because the vax and tahoe differ in float format!), the power
62    * of 2 of the hex-float exponent, and the hex-float mantissa.
63    * Most of these arguments are not used at compile time; they are
64    * used in a post-check to make sure the constants were compiled
65    * correctly.
66    *
67    * People who want to use the constant will have to do their own
68    *     #define foo vccast(foo)
69    * since CPP cannot do this for them from inside another macro (sigh).
70    * We define "vccast" if this needs doing.
71    */
72#  define vc(name, value, x1,x2,x3,x4, bexp, xval) \
73	static long const cat3(name,,x)[] = {cat3t(0x,x1,x2), cat3t(0x,x3,x4)};
74
75#  define ic(name, value, bexp, xval) ;
76
77#else	/* vax or tahoe */
78
79   /* Hooray, we have an IEEE machine */
80#  undef vccast
81#  define vc(name, value, x1,x2,x3,x4, bexp, xval) ;
82
83#  define ic(name, value, bexp, xval) \
84	static double const name = value;
85
86#endif	/* defined(vax)||defined(tahoe) */
87
88
89/*
90 * Functions internal to the math package, yet not static.
91 */
92extern double	__exp__E(double, double);
93extern double	__log__L(double);
94
95struct Double {double a, b;};
96double __exp__D(double, double);
97struct Double __log__D(double);
98