2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2004 Stefan Farfeleder.
7 * Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
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17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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41 * This implementation of <tgmath.h> uses the two following macros,
42 * which are based on the macros described in C11 proposal N1404:
43 * __tg_impl_simple(x, y, z, fnl, fn, fnf, ...)
44 * Invokes fnl() if the corresponding real type of x, y or z is long
45 * double, fn() if it is double or any has an integer type, and fnf()
47 * __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...)
48 * Invokes [c]fnl() if the corresponding real type of x or y is long
49 * double, [c]fn() if it is double or any has an integer type, and
50 * [c]fnf() otherwise. The function with the 'c' prefix is called if
51 * any of x or y is a complex number.
52 * Both macros call the chosen function with all additional arguments passed
53 * to them, as given by __VA_ARGS__.
55 * Note that these macros cannot be implemented with C's ?: operator,
56 * because the return type of the whole expression would incorrectly be long
57 * double complex regardless of the argument types.
59 * The structure of the C11 implementation of these macros can in
60 * principle be reused for non-C11 compilers, but due to an integer
61 * promotion bug for complex types in GCC 4.2, simply let non-C11
62 * compilers use an inefficient yet reliable version.
65 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
66 __has_extension(c_generic_selections)
67 #define __tg_generic(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
69 long double _Complex: cfnl, \
70 double _Complex: cfn, \
71 float _Complex: cfnf, \
76 #define __tg_type(x) \
77 __tg_generic(x, (long double _Complex)0, (double _Complex)0, \
78 (float _Complex)0, (long double)0, (double)0, (float)0)
79 #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
81 __tg_type(x) + __tg_type(y) + __tg_type(z), \
82 fnl, fn, fnf, fnl, fn, fnf)(__VA_ARGS__)
83 #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
85 __tg_type(x) + __tg_type(y), \
86 cfnl, cfn, cfnf, fnl, fn, fnf)(__VA_ARGS__)
87 #elif defined(__generic)
88 #define __tg_generic_simple(x, fnl, fn, fnf) \
89 __generic(x, long double _Complex, fnl, \
90 __generic(x, double _Complex, fn, \
91 __generic(x, float _Complex, fnf, \
92 __generic(x, long double, fnl, \
93 __generic(x, float, fnf, fn)))))
94 #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
95 __tg_generic_simple(x, \
96 __tg_generic_simple(y, \
97 __tg_generic_simple(z, fnl, fnl, fnl), \
98 __tg_generic_simple(z, fnl, fnl, fnl), \
99 __tg_generic_simple(z, fnl, fnl, fnl)), \
100 __tg_generic_simple(y, \
101 __tg_generic_simple(z, fnl, fnl, fnl), \
102 __tg_generic_simple(z, fnl, fn , fn ), \
103 __tg_generic_simple(z, fnl, fn , fn )), \
104 __tg_generic_simple(y, \
105 __tg_generic_simple(z, fnl, fnl, fnl), \
106 __tg_generic_simple(z, fnl, fn , fn ), \
107 __tg_generic_simple(z, fnl, fn , fnf)))(__VA_ARGS__)
108 #define __tg_generic_full(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
109 __generic(x, long double _Complex, cfnl, \
110 __generic(x, double _Complex, cfn, \
111 __generic(x, float _Complex, cfnf, \
112 __generic(x, long double, fnl, \
113 __generic(x, float, fnf, fn)))))
114 #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
115 __tg_generic_full(x, \
116 __tg_generic_full(y, cfnl, cfnl, cfnl, cfnl, cfnl, cfnl), \
117 __tg_generic_full(y, cfnl, cfn , cfn , cfnl, cfn , cfn ), \
118 __tg_generic_full(y, cfnl, cfn , cfnf, cfnl, cfn , cfnf), \
119 __tg_generic_full(y, cfnl, cfnl, cfnl, fnl , fnl , fnl ), \
120 __tg_generic_full(y, cfnl, cfn , cfn , fnl , fn , fn ), \
121 __tg_generic_full(y, cfnl, cfn , cfnf, fnl , fn , fnf )) \
124 #error "<tgmath.h> not implemented for this compiler"
127 /* Macros to save lots of repetition below */
128 #define __tg_simple(x, fn) \
129 __tg_impl_simple(x, x, x, fn##l, fn, fn##f, x)
130 #define __tg_simple2(x, y, fn) \
131 __tg_impl_simple(x, x, y, fn##l, fn, fn##f, x, y)
132 #define __tg_simple3(x, y, z, fn) \
133 __tg_impl_simple(x, y, z, fn##l, fn, fn##f, x, y, z)
134 #define __tg_simplev(x, fn, ...) \
135 __tg_impl_simple(x, x, x, fn##l, fn, fn##f, __VA_ARGS__)
136 #define __tg_full(x, fn) \
137 __tg_impl_full(x, x, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x)
138 #define __tg_full2(x, y, fn) \
139 __tg_impl_full(x, y, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x, y)
141 /* 7.22#4 -- These macros expand to real or complex functions, depending on
142 * the type of their arguments. */
143 #define acos(x) __tg_full(x, acos)
144 #define asin(x) __tg_full(x, asin)
145 #define atan(x) __tg_full(x, atan)
146 #define acosh(x) __tg_full(x, acosh)
147 #define asinh(x) __tg_full(x, asinh)
148 #define atanh(x) __tg_full(x, atanh)
149 #define cos(x) __tg_full(x, cos)
150 #define sin(x) __tg_full(x, sin)
151 #define tan(x) __tg_full(x, tan)
152 #define cosh(x) __tg_full(x, cosh)
153 #define sinh(x) __tg_full(x, sinh)
154 #define tanh(x) __tg_full(x, tanh)
155 #define exp(x) __tg_full(x, exp)
156 #define log(x) __tg_full(x, log)
157 #define pow(x, y) __tg_full2(x, y, pow)
158 #define sqrt(x) __tg_full(x, sqrt)
160 /* "The corresponding type-generic macro for fabs and cabs is fabs." */
161 #define fabs(x) __tg_impl_full(x, x, cabsl, cabs, cabsf, \
162 fabsl, fabs, fabsf, x)
164 /* 7.22#5 -- These macros are only defined for arguments with real type. */
165 #define atan2(x, y) __tg_simple2(x, y, atan2)
166 #define cbrt(x) __tg_simple(x, cbrt)
167 #define ceil(x) __tg_simple(x, ceil)
168 #define copysign(x, y) __tg_simple2(x, y, copysign)
169 #define erf(x) __tg_simple(x, erf)
170 #define erfc(x) __tg_simple(x, erfc)
171 #define exp2(x) __tg_simple(x, exp2)
172 #define expm1(x) __tg_simple(x, expm1)
173 #define fdim(x, y) __tg_simple2(x, y, fdim)
174 #define floor(x) __tg_simple(x, floor)
175 #define fma(x, y, z) __tg_simple3(x, y, z, fma)
176 #define fmax(x, y) __tg_simple2(x, y, fmax)
177 #define fmin(x, y) __tg_simple2(x, y, fmin)
178 #define fmod(x, y) __tg_simple2(x, y, fmod)
179 #define frexp(x, y) __tg_simplev(x, frexp, x, y)
180 #define hypot(x, y) __tg_simple2(x, y, hypot)
181 #define ilogb(x) __tg_simple(x, ilogb)
182 #define ldexp(x, y) __tg_simplev(x, ldexp, x, y)
183 #define lgamma(x) __tg_simple(x, lgamma)
184 #define llrint(x) __tg_simple(x, llrint)
185 #define llround(x) __tg_simple(x, llround)
186 #define log10(x) __tg_simple(x, log10)
187 #define log1p(x) __tg_simple(x, log1p)
188 #define log2(x) __tg_simple(x, log2)
189 #define logb(x) __tg_simple(x, logb)
190 #define lrint(x) __tg_simple(x, lrint)
191 #define lround(x) __tg_simple(x, lround)
192 #define nearbyint(x) __tg_simple(x, nearbyint)
193 #define nextafter(x, y) __tg_simple2(x, y, nextafter)
194 #define nexttoward(x, y) __tg_simplev(x, nexttoward, x, y)
195 #define remainder(x, y) __tg_simple2(x, y, remainder)
196 #define remquo(x, y, z) __tg_impl_simple(x, x, y, remquol, remquo, \
198 #define rint(x) __tg_simple(x, rint)
199 #define round(x) __tg_simple(x, round)
200 #define scalbn(x, y) __tg_simplev(x, scalbn, x, y)
201 #define scalbln(x, y) __tg_simplev(x, scalbln, x, y)
202 #define tgamma(x) __tg_simple(x, tgamma)
203 #define trunc(x) __tg_simple(x, trunc)
205 /* 7.22#6 -- These macros always expand to complex functions. */
206 #define carg(x) __tg_simple(x, carg)
207 #define cimag(x) __tg_simple(x, cimag)
208 #define conj(x) __tg_simple(x, conj)
209 #define cproj(x) __tg_simple(x, cproj)
210 #define creal(x) __tg_simple(x, creal)
212 #endif /* !_TGMATH_H_ */