2 * Copyright (c) 2004 Stefan Farfeleder.
5 * Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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39 * This implementation of <tgmath.h> uses the two following macros,
40 * which are based on the macros described in C11 proposal N1404:
41 * __tg_impl_simple(x, y, z, fnl, fn, fnf, ...)
42 * Invokes fnl() if the corresponding real type of x, y or z is long
43 * double, fn() if it is double or any has an integer type, and fnf()
45 * __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...)
46 * Invokes [c]fnl() if the corresponding real type of x or y is long
47 * double, [c]fn() if it is double or any has an integer type, and
48 * [c]fnf() otherwise. The function with the 'c' prefix is called if
49 * any of x or y is a complex number.
50 * Both macros call the chosen function with all additional arguments passed
51 * to them, as given by __VA_ARGS__.
53 * Note that these macros cannot be implemented with C's ?: operator,
54 * because the return type of the whole expression would incorrectly be long
55 * double complex regardless of the argument types.
57 * The structure of the C11 implementation of these macros can in
58 * principle be reused for non-C11 compilers, but due to an integer
59 * promotion bug for complex types in GCC 4.2, simply let non-C11
60 * compilers use an inefficient yet reliable version.
63 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
64 #define __tg_generic(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
66 long double _Complex: cfnl, \
67 double _Complex: cfn, \
68 float _Complex: cfnf, \
73 #define __tg_type(x) \
74 __tg_generic(x, (long double _Complex)0, (double _Complex)0, \
75 (float _Complex)0, (long double)0, (double)0, (float)0)
76 #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
78 __tg_type(x) + __tg_type(y) + __tg_type(z), \
79 fnl, fn, fnf, fnl, fn, fnf)(__VA_ARGS__)
80 #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
82 __tg_type(x) + __tg_type(y), \
83 cfnl, cfn, cfnf, fnl, fn, fnf)(__VA_ARGS__)
84 #elif defined(__generic)
85 #define __tg_generic_simple(x, fnl, fn, fnf) \
86 __generic(x, long double _Complex, fnl, \
87 __generic(x, double _Complex, fn, \
88 __generic(x, float _Complex, fnf, \
89 __generic(x, long double, fnl, \
90 __generic(x, float, fnf, fn)))))
91 #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
92 __tg_generic_simple(x, \
93 __tg_generic_simple(y, \
94 __tg_generic_simple(z, fnl, fnl, fnl), \
95 __tg_generic_simple(z, fnl, fnl, fnl), \
96 __tg_generic_simple(z, fnl, fnl, fnl)), \
97 __tg_generic_simple(y, \
98 __tg_generic_simple(z, fnl, fnl, fnl), \
99 __tg_generic_simple(z, fnl, fn , fn ), \
100 __tg_generic_simple(z, fnl, fn , fn )), \
101 __tg_generic_simple(y, \
102 __tg_generic_simple(z, fnl, fnl, fnl), \
103 __tg_generic_simple(z, fnl, fn , fn ), \
104 __tg_generic_simple(z, fnl, fn , fnf)))(__VA_ARGS__)
105 #define __tg_generic_full(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
106 __generic(x, long double _Complex, cfnl, \
107 __generic(x, double _Complex, cfn, \
108 __generic(x, float _Complex, cfnf, \
109 __generic(x, long double, fnl, \
110 __generic(x, float, fnf, fn)))))
111 #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
112 __tg_generic_full(x, \
113 __tg_generic_full(y, cfnl, cfnl, cfnl, cfnl, cfnl, cfnl), \
114 __tg_generic_full(y, cfnl, cfn , cfn , cfnl, cfn , cfn ), \
115 __tg_generic_full(y, cfnl, cfn , cfnf, cfnl, cfn , cfnf), \
116 __tg_generic_full(y, cfnl, cfnl, cfnl, fnl , fnl , fnl ), \
117 __tg_generic_full(y, cfnl, cfn , cfn , fnl , fn , fn ), \
118 __tg_generic_full(y, cfnl, cfn , cfnf, fnl , fn , fnf )) \
121 #error "<tgmath.h> not implemented for this compiler"
124 /* Macros to save lots of repetition below */
125 #define __tg_simple(x, fn) \
126 __tg_impl_simple(x, x, x, fn##l, fn, fn##f, x)
127 #define __tg_simple2(x, y, fn) \
128 __tg_impl_simple(x, x, y, fn##l, fn, fn##f, x, y)
129 #define __tg_simple3(x, y, z, fn) \
130 __tg_impl_simple(x, y, z, fn##l, fn, fn##f, x, y, z)
131 #define __tg_simplev(x, fn, ...) \
132 __tg_impl_simple(x, x, x, fn##l, fn, fn##f, __VA_ARGS__)
133 #define __tg_full(x, fn) \
134 __tg_impl_full(x, x, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x)
135 #define __tg_full2(x, y, fn) \
136 __tg_impl_full(x, y, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x, y)
138 /* 7.22#4 -- These macros expand to real or complex functions, depending on
139 * the type of their arguments. */
140 #define acos(x) __tg_full(x, acos)
141 #define asin(x) __tg_full(x, asin)
142 #define atan(x) __tg_full(x, atan)
143 #define acosh(x) __tg_full(x, acosh)
144 #define asinh(x) __tg_full(x, asinh)
145 #define atanh(x) __tg_full(x, atanh)
146 #define cos(x) __tg_full(x, cos)
147 #define sin(x) __tg_full(x, sin)
148 #define tan(x) __tg_full(x, tan)
149 #define cosh(x) __tg_full(x, cosh)
150 #define sinh(x) __tg_full(x, sinh)
151 #define tanh(x) __tg_full(x, tanh)
152 #define exp(x) __tg_full(x, exp)
153 #define log(x) __tg_full(x, log)
154 #define pow(x, y) __tg_full2(x, y, pow)
155 #define sqrt(x) __tg_full(x, sqrt)
157 /* "The corresponding type-generic macro for fabs and cabs is fabs." */
158 #define fabs(x) __tg_impl_full(x, x, cabsl, cabs, cabsf, \
159 fabsl, fabs, fabsf, x)
161 /* 7.22#5 -- These macros are only defined for arguments with real type. */
162 #define atan2(x, y) __tg_simple2(x, y, atan2)
163 #define cbrt(x) __tg_simple(x, cbrt)
164 #define ceil(x) __tg_simple(x, ceil)
165 #define copysign(x, y) __tg_simple2(x, y, copysign)
166 #define erf(x) __tg_simple(x, erf)
167 #define erfc(x) __tg_simple(x, erfc)
168 #define exp2(x) __tg_simple(x, exp2)
169 #define expm1(x) __tg_simple(x, expm1)
170 #define fdim(x, y) __tg_simple2(x, y, fdim)
171 #define floor(x) __tg_simple(x, floor)
172 #define fma(x, y, z) __tg_simple3(x, y, z, fma)
173 #define fmax(x, y) __tg_simple2(x, y, fmax)
174 #define fmin(x, y) __tg_simple2(x, y, fmin)
175 #define fmod(x, y) __tg_simple2(x, y, fmod)
176 #define frexp(x, y) __tg_simplev(x, frexp, x, y)
177 #define hypot(x, y) __tg_simple2(x, y, hypot)
178 #define ilogb(x) __tg_simple(x, ilogb)
179 #define ldexp(x, y) __tg_simplev(x, ldexp, x, y)
180 #define lgamma(x) __tg_simple(x, lgamma)
181 #define llrint(x) __tg_simple(x, llrint)
182 #define llround(x) __tg_simple(x, llround)
183 #define log10(x) __tg_simple(x, log10)
184 #define log1p(x) __tg_simple(x, log1p)
185 #define log2(x) __tg_simple(x, log2)
186 #define logb(x) __tg_simple(x, logb)
187 #define lrint(x) __tg_simple(x, lrint)
188 #define lround(x) __tg_simple(x, lround)
189 #define nearbyint(x) __tg_simple(x, nearbyint)
190 #define nextafter(x, y) __tg_simple2(x, y, nextafter)
191 #define nexttoward(x, y) __tg_simplev(x, nexttoward, x, y)
192 #define remainder(x, y) __tg_simple2(x, y, remainder)
193 #define remquo(x, y, z) __tg_impl_simple(x, x, y, remquol, remquo, \
195 #define rint(x) __tg_simple(x, rint)
196 #define round(x) __tg_simple(x, round)
197 #define scalbn(x, y) __tg_simplev(x, scalbn, x, y)
198 #define scalbln(x, y) __tg_simplev(x, scalbln, x, y)
199 #define tgamma(x) __tg_simple(x, tgamma)
200 #define trunc(x) __tg_simple(x, trunc)
202 /* 7.22#6 -- These macros always expand to complex functions. */
203 #define carg(x) __tg_simple(x, carg)
204 #define cimag(x) __tg_simple(x, cimag)
205 #define conj(x) __tg_simple(x, conj)
206 #define cproj(x) __tg_simple(x, cproj)
207 #define creal(x) __tg_simple(x, creal)
209 #endif /* !_TGMATH_H_ */