sysdeps/generic/math-narrow-alias.h

   1 /* Alias macros for functions returning a narrower type.
   2    Copyright (C) 2018-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _MATH_NARROW_ALIAS_H
  20 #define _MATH_NARROW_ALIAS_H    1
  21
  22 #include <bits/floatn.h>
  23 #include <bits/long-double.h>
  24
  25 /* The following macros declare aliases for a narrowing function.  The
  26    sole argument is the base name of a family of functions, such as
  27    "add".  If any platform changes long double format after the
  28    introduction of narrowing functions, in a way requiring symbol
  29    versioning compatibility, additional variants of these macros will
  30    be needed.  */
  31
  32 #define libm_alias_float_double_main(func)      \
  33   weak_alias (__f ## func, f ## func)           \
  34   weak_alias (__f ## func, f32 ## func ## f64)  \
  35   weak_alias (__f ## func, f32 ## func ## f32x)
  36
  37 #ifdef NO_LONG_DOUBLE
  38 # define libm_alias_float_double(func)          \
  39   libm_alias_float_double_main (func)           \
  40   weak_alias (__f ## func, f ## func ## l)
  41 #else
  42 # define libm_alias_float_double(func)          \
  43   libm_alias_float_double_main (func)
  44 #endif
  45
  46 #define libm_alias_float32x_float64_main(func)                  \
  47   weak_alias (__f32x ## func ## f64, f32x ## func ## f64)
  48
  49 #ifdef NO_LONG_DOUBLE
  50 # define libm_alias_float32x_float64(func)              \
  51   libm_alias_float32x_float64_main (func)               \
  52   weak_alias (__f32x ## func ## f64, d ## func ## l)
  53 #elif defined __LONG_DOUBLE_MATH_OPTIONAL
  54 # define libm_alias_float32x_float64(func)                      \
  55   libm_alias_float32x_float64_main (func)                       \
  56   weak_alias (__f32x ## func ## f64, __nldbl_d ## func ## l)
  57 #else
  58 # define libm_alias_float32x_float64(func)      \
  59   libm_alias_float32x_float64_main (func)
  60 #endif
  61
  62 #if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
  63 # define libm_alias_float_ldouble_f128(func)            \
  64   weak_alias (__f ## func ## l, f32 ## func ## f128)
  65 # define libm_alias_double_ldouble_f128(func)           \
  66   weak_alias (__d ## func ## l, f32x ## func ## f128)   \
  67   weak_alias (__d ## func ## l, f64 ## func ## f128)
  68 #else
  69 # define libm_alias_float_ldouble_f128(func)
  70 # define libm_alias_double_ldouble_f128(func)
  71 #endif
  72
  73 #if __HAVE_FLOAT64X_LONG_DOUBLE
  74 # define libm_alias_float_ldouble_f64x(func)            \
  75   weak_alias (__f ## func ## l, f32 ## func ## f64x)
  76 # define libm_alias_double_ldouble_f64x(func)           \
  77   weak_alias (__d ## func ## l, f32x ## func ## f64x)   \
  78   weak_alias (__d ## func ## l, f64 ## func ## f64x)
  79 #else
  80 # define libm_alias_float_ldouble_f64x(func)
  81 # define libm_alias_double_ldouble_f64x(func)
  82 #endif
  83
  84 #define libm_alias_float_ldouble(func)          \
  85   weak_alias (__f ## func ## l, f ## func ## l) \
  86   libm_alias_float_ldouble_f128 (func)          \
  87   libm_alias_float_ldouble_f64x (func)
  88
  89 #define libm_alias_double_ldouble(func)         \
  90   weak_alias (__d ## func ## l, d ## func ## l) \
  91   libm_alias_double_ldouble_f128 (func)         \
  92   libm_alias_double_ldouble_f64x (func)
  93
  94 #define libm_alias_float64x_float128(func)                      \
  95   weak_alias (__f64x ## func ## f128, f64x ## func ## f128)
  96
  97 #define libm_alias_float32_float128_main(func)                  \
  98   weak_alias (__f32 ## func ## f128, f32 ## func ## f128)
  99
 100 #define libm_alias_float64_float128_main(func)                  \
 101   weak_alias (__f64 ## func ## f128, f64 ## func ## f128)       \
 102   weak_alias (__f64 ## func ## f128, f32x ## func ## f128)
 103
 104 #include <math-narrow-alias-float128.h>
 105
 106 /* The following macros declare narrowing-named aliases for a
 107    non-narrowing function.  */
 108
 109 #define libm_alias_double_narrow_main(from, to) \
 110   weak_alias (from, f32x ## to ## f64)
 111
 112 #ifdef NO_LONG_DOUBLE
 113 # define libm_alias_double_narrow(from, to)     \
 114   libm_alias_double_narrow_main (from, to)      \
 115   weak_alias (from, d ## to ## l)
 116 #else
 117 # define libm_alias_double_narrow(from, to)     \
 118   libm_alias_double_narrow_main (from, to)
 119 #endif
 120
 121 #if __HAVE_FLOAT64X_LONG_DOUBLE && __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
 122 # define libm_alias_ldouble_narrow(from, to)    \
 123   weak_alias (from ## l, f64x ## to ## f128)
 124 #else
 125 # define libm_alias_ldouble_narrow(from, to)
 126 #endif
 127
 128 #if __HAVE_DISTINCT_FLOAT128 && __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
 129 # define libm_alias_float128_narrow(from, to)   \
 130   weak_alias (from ## f128, f64x ## to ## f128)
 131 #else
 132 # define libm_alias_float128_narrow(from, to)
 133 #endif
 134
 135 #endif /* math-narrow-alias.h.  */