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1/* $OpenBSD: tgmath.h,v 1.1 2011/07/08 19:28:06 martynas Exp $ */
2
3/*-
4 * Copyright (c) 2004 Stefan Farfeleder.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/include/tgmath.h,v 1.5 2007/02/02 18:30:23 schweikh Exp $
29 */
30
31#ifndef _TGMATH_H_
32#define _TGMATH_H_
33
34#include <complex.h>
35#include <math.h>
36
37/*
38 * This implementation of <tgmath.h> requires two implementation-dependent
39 * macros to be defined:
40 * __tg_impl_simple(x, y, z, fn, fnf, fnl, ...)
41 * Invokes fnl() if the corresponding real type of x, y or z is long
42 * double, fn() if it is double or any has an integer type, and fnf()
43 * otherwise.
44 * __tg_impl_full(x, y, z, fn, fnf, fnl, cfn, cfnf, cfnl, ...)
45 * Invokes [c]fnl() if the corresponding real type of x, y or z is long
46 * double, [c]fn() if it is double or any has an integer type, and
47 * [c]fnf() otherwise. The function with the 'c' prefix is called if
48 * any of x, y or z is a complex number.
49 * Both macros call the chosen function with all additional arguments passed
50 * to them, as given by __VA_ARGS__.
51 *
52 * Note that these macros cannot be implemented with C's ?: operator,
53 * because the return type of the whole expression would incorrectly be long
54 * double complex regardless of the argument types.
55 */
56
57#if __GNUC_PREREQ__(3, 1)
58#define __tg_type(e, t) __builtin_types_compatible_p(__typeof__(e), t)
59#define __tg_type3(e1, e2, e3, t) \
60 (__tg_type(e1, t) || __tg_type(e2, t) || __tg_type(e3, t))
61#define __tg_type_corr(e1, e2, e3, t) \
62 (__tg_type3(e1, e2, e3, t) || __tg_type3(e1, e2, e3, t _Complex))
63#define __tg_integer(e1, e2, e3) \
64 (((__typeof__(e1))1.5 == 1) || ((__typeof__(e2))1.5 == 1) || \
65 ((__typeof__(e3))1.5 == 1))
66#define __tg_is_complex(e1, e2, e3) \
67 (__tg_type3(e1, e2, e3, float _Complex) || \
68 __tg_type3(e1, e2, e3, double _Complex) || \
69 __tg_type3(e1, e2, e3, long double _Complex) || \
70 __tg_type3(e1, e2, e3, __typeof__(_Complex_I)))
71
72#define __tg_impl_simple(x, y, z, fn, fnf, fnl, ...) \
73 __builtin_choose_expr(__tg_type_corr(x, y, z, long double), \
74 fnl(__VA_ARGS__), __builtin_choose_expr( \
75 __tg_type_corr(x, y, z, double) || __tg_integer(x, y, z),\
76 fn(__VA_ARGS__), fnf(__VA_ARGS__)))
77
78#define __tg_impl_full(x, y, z, fn, fnf, fnl, cfn, cfnf, cfnl, ...) \
79 __builtin_choose_expr(__tg_is_complex(x, y, z), \
80 __tg_impl_simple(x, y, z, cfn, cfnf, cfnl, __VA_ARGS__), \
81 __tg_impl_simple(x, y, z, fn, fnf, fnl, __VA_ARGS__))
82
83#else /* __GNUC__ */
84#error "<tgmath.h> not implemented for this compiler"
85#endif /* !__GNUC__ */
86
87/* Macros to save lots of repetition below */
88#define __tg_simple(x, fn) \
89 __tg_impl_simple(x, x, x, fn, fn##f, fn##l, x)
90#define __tg_simple2(x, y, fn) \
91 __tg_impl_simple(x, x, y, fn, fn##f, fn##l, x, y)
92#define __tg_simplev(x, fn, ...) \
93 __tg_impl_simple(x, x, x, fn, fn##f, fn##l, __VA_ARGS__)
94#define __tg_full(x, fn) \
95 __tg_impl_full(x, x, x, fn, fn##f, fn##l, c##fn, c##fn##f, c##fn##l, x)
96
97/* 7.22#4 -- These macros expand to real or complex functions, depending on
98 * the type of their arguments. */
99#define acos(x) __tg_full(x, acos)
100#define asin(x) __tg_full(x, asin)
101#define atan(x) __tg_full(x, atan)
102#define acosh(x) __tg_full(x, acosh)
103#define asinh(x) __tg_full(x, asinh)
104#define atanh(x) __tg_full(x, atanh)
105#define cos(x) __tg_full(x, cos)
106#define sin(x) __tg_full(x, sin)
107#define tan(x) __tg_full(x, tan)
108#define cosh(x) __tg_full(x, cosh)
109#define sinh(x) __tg_full(x, sinh)
110#define tanh(x) __tg_full(x, tanh)
111#define exp(x) __tg_full(x, exp)
112#define log(x) __tg_full(x, log)
113#define pow(x, y) __tg_impl_full(x, x, y, pow, powf, powl, \
114 cpow, cpowf, cpowl, x, y)
115#define sqrt(x) __tg_full(x, sqrt)
116
117/* "The corresponding type-generic macro for fabs and cabs is fabs." */
118#define fabs(x) __tg_impl_full(x, x, x, fabs, fabsf, fabsl, \
119 cabs, cabsf, cabsl, x)
120
121/* 7.22#5 -- These macros are only defined for arguments with real type. */
122#define atan2(x, y) __tg_simple2(x, y, atan2)
123#define cbrt(x) __tg_simple(x, cbrt)
124#define ceil(x) __tg_simple(x, ceil)
125#define copysign(x, y) __tg_simple2(x, y, copysign)
126#define erf(x) __tg_simple(x, erf)
127#define erfc(x) __tg_simple(x, erfc)
128#define exp2(x) __tg_simple(x, exp2)
129#define expm1(x) __tg_simple(x, expm1)
130#define fdim(x, y) __tg_simple2(x, y, fdim)
131#define floor(x) __tg_simple(x, floor)
132#define fma(x, y, z) __tg_impl_simple(x, y, z, fma, fmaf, fmal, x, y, z)
133#define fmax(x, y) __tg_simple2(x, y, fmax)
134#define fmin(x, y) __tg_simple2(x, y, fmin)
135#define fmod(x, y) __tg_simple2(x, y, fmod)
136#define frexp(x, y) __tg_simplev(x, frexp, x, y)
137#define hypot(x, y) __tg_simple2(x, y, hypot)
138#define ilogb(x) __tg_simple(x, ilogb)
139#define ldexp(x, y) __tg_simplev(x, ldexp, x, y)
140#define lgamma(x) __tg_simple(x, lgamma)
141#define llrint(x) __tg_simple(x, llrint)
142#define llround(x) __tg_simple(x, llround)
143#define log10(x) __tg_simple(x, log10)
144#define log1p(x) __tg_simple(x, log1p)
145#define log2(x) __tg_simple(x, log2)
146#define logb(x) __tg_simple(x, logb)
147#define lrint(x) __tg_simple(x, lrint)
148#define lround(x) __tg_simple(x, lround)
149#define nearbyint(x) __tg_simple(x, nearbyint)
150#define nextafter(x, y) __tg_simple2(x, y, nextafter)
151#define nexttoward(x, y) __tg_simplev(x, nexttoward, x, y)
152#define remainder(x, y) __tg_simple2(x, y, remainder)
153#define remquo(x, y, z) __tg_impl_simple(x, x, y, remquo, remquof, \
154 remquol, x, y, z)
155#define rint(x) __tg_simple(x, rint)
156#define round(x) __tg_simple(x, round)
157#define scalbn(x, y) __tg_simplev(x, scalbn, x, y)
158#define scalbln(x, y) __tg_simplev(x, scalbln, x, y)
159#define tgamma(x) __tg_simple(x, tgamma)
160#define trunc(x) __tg_simple(x, trunc)
161
162/* 7.22#6 -- These macros always expand to complex functions. */
163#define carg(x) __tg_simple(x, carg)
164#define cimag(x) __tg_simple(x, cimag)
165#define conj(x) __tg_simple(x, conj)
166#define cproj(x) __tg_simple(x, cproj)
167#define creal(x) __tg_simple(x, creal)
168
169#endif /* !_TGMATH_H_ */