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1/* $OpenBSD: mconf.h,v 1.1 2011/07/02 18:11:01 martynas Exp $ */
2
3/*
4 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19/* mconf.h
20 *
21 * Common include file for math routines
22 *
23 *
24 *
25 * SYNOPSIS:
26 *
27 * #include "mconf.h"
28 *
29 *
30 *
31 * DESCRIPTION:
32 *
33 * This file contains definitions for error codes that are
34 * passed to the common error handling routine mtherr()
35 * (which see).
36 *
37 * The file also includes a conditional assembly definition
38 * for the type of computer arithmetic (IEEE, DEC, Motorola
39 * IEEE, or UNKnown).
40 *
41 * For Digital Equipment PDP-11 and VAX computers, certain
42 * IBM systems, and others that use numbers with a 56-bit
43 * significand, the symbol DEC should be defined. In this
44 * mode, most floating point constants are given as arrays
45 * of octal integers to eliminate decimal to binary conversion
46 * errors that might be introduced by the compiler.
47 *
48 * For little-endian computers, such as IBM PC, that follow the
49 * IEEE Standard for Binary Floating Point Arithmetic (ANSI/IEEE
50 * Std 754-1985), the symbol IBMPC should be defined. These
51 * numbers have 53-bit significands. In this mode, constants
52 * are provided as arrays of hexadecimal 16 bit integers.
53 *
54 * Big-endian IEEE format is denoted MIEEE. On some RISC
55 * systems such as Sun SPARC, double precision constants
56 * must be stored on 8-byte address boundaries. Since integer
57 * arrays may be aligned differently, the MIEEE configuration
58 * may fail on such machines.
59 *
60 * To accommodate other types of computer arithmetic, all
61 * constants are also provided in a normal decimal radix
62 * which one can hope are correctly converted to a suitable
63 * format by the available C language compiler. To invoke
64 * this mode, define the symbol UNK.
65 *
66 * An important difference among these modes is a predefined
67 * set of machine arithmetic constants for each. The numbers
68 * MACHEP (the machine roundoff error), MAXNUM (largest number
69 * represented), and several other parameters are preset by
70 * the configuration symbol. Check the file const.c to
71 * ensure that these values are correct for your computer.
72 *
73 * Configurations NANS, INFINITIES, MINUSZERO, and DENORMAL
74 * may fail on many systems. Verify that they are supposed
75 * to work on your computer.
76 */
77
78#include <sys/types.h>
79#include <sys/endian.h>
80
81/* Constant definitions for math error conditions
82 */
83
84#define DOMAIN 1 /* argument domain error */
85#define SING 2 /* argument singularity */
86#define OVERFLOW 3 /* overflow range error */
87#define UNDERFLOW 4 /* underflow range error */
88#define TLOSS 5 /* total loss of precision */
89#define PLOSS 6 /* partial loss of precision */
90
91#define EDOM 33
92#define ERANGE 34
93
94/* Complex numeral. */
95typedef struct
96 {
97 double r;
98 double i;
99 } cmplx;
100
101/* Long double complex numeral. */
102typedef struct
103 {
104 double r;
105 double i;
106 } cmplxl;
107
108/* Type of computer arithmetic */
109
110/* PDP-11, Pro350, VAX:
111 */
112#ifdef __vax__
113#define DEC 1
114#endif /* __vax__ */
115
116/* Intel IEEE, low order words come first:
117 */
118/* #define IBMPC 1 */
119
120/* Motorola IEEE, high order words come first
121 * (Sun 680x0 workstation):
122 */
123/* #define MIEEE 1 */
124
125/* UNKnown arithmetic, invokes coefficients given in
126 * normal decimal format. Beware of range boundary
127 * problems (MACHEP, MAXLOG, etc. in const.c) and
128 * roundoff problems in pow.c:
129 * (Sun SPARCstation)
130 */
131#ifndef __vax__
132#define UNK 1
133#endif /* !__vax__ */
134
135/* If you define UNK, then be sure to set BIGENDIAN properly. */
136#if BYTE_ORDER == BIG_ENDIAN
137#define BIGENDIAN 1
138#endif /* BYTE_ORDER == BIG_ENDIAN */
139
140/* Define this `volatile' if your compiler thinks
141 * that floating point arithmetic obeys the associative
142 * and distributive laws. It will defeat some optimizations
143 * (but probably not enough of them).
144 *
145 * #define VOLATILE volatile
146 */
147#define VOLATILE
148
149/* For 12-byte long doubles on an i386, pad a 16-bit short 0
150 * to the end of real constants initialized by integer arrays.
151 *
152 * #define XPD 0,
153 *
154 * Otherwise, the type is 10 bytes long and XPD should be
155 * defined blank (e.g., Microsoft C).
156 *
157 * #define XPD
158 */
159#define XPD 0,
160
161/* Define to support tiny denormal numbers, else undefine. */
162#ifndef __vax__
163#define DENORMAL 1
164#endif /* !__vax__ */
165
166/* Define to ask for infinity support, else undefine. */
167#ifndef __vax__
168#define INFINITIES 1
169#endif /* !__vax__ */
170
171/* Define to ask for support of numbers that are Not-a-Number,
172 else undefine. This may automatically define INFINITIES in some files. */
173#ifndef __vax__
174#define NANS 1
175#endif /* !__vax__ */
176
177/* Define to distinguish between -0.0 and +0.0. */
178#define MINUSZERO 1
179
180/* Define 1 for ANSI C atan2() function
181 See atan.c and clog.c. */
182#define ANSIC 1
183
184int mtherr();
185
186/* Variable for error reporting. See mtherr.c. */
187extern int merror;