libgcc/config/sh/linux-atomic.c

   1 /* Copyright (C) 2012-2024 Free Software Foundation, Inc.
   2
   3    This file is part of GCC.
   4
   5    GCC is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    GCC 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
  13    GNU General Public License for more details.
  14
  15    Under Section 7 of GPL version 3, you are granted additional
  16    permissions described in the GCC Runtime Library Exception, version
  17    3.1, as published by the Free Software Foundation.
  18
  19    You should have received a copy of the GNU General Public License and
  20    a copy of the GCC Runtime Library Exception along with this program;
  21    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22    <http://www.gnu.org/licenses/>.  */
  23
  24 /* Atomic built-in C functions for link compatibility with older code that
  25    was compiled to emit function calls for atomic built-ins.
  26    Notice that if no atomic model has been selected the functions in this
  27    file must not be generated, or else they will result in infinite no-op
  28    loops.
  29    Notice also, that all the generated functions below take three parameters,
  30    which is not actually true for some of the built-in functions.  However,
  31    on SH this does not matter, since the first four parameters are always
  32    passed in call clobbered registers.
  33    The return type for the sync_bool_compare_and_swap functions is also
  34    actually supposed to be a bool, but this also doesn't matter since any
  35    int return type <= 32 bit is returned in R0 on SH.  */
  36
  37 #if !__SH_ATOMIC_MODEL_NONE__
  38
  39 typedef unsigned char uint8_t;
  40 typedef unsigned short uint16_t;
  41 typedef unsigned int uint32_t;
  42
  43 #define uint8_t_sz 1
  44 #define uint16_t_sz 2
  45 #define uint32_t_sz 4
  46
  47 #define typesz(x) x##_sz
  48
  49 #define concat(x,y) __ ## x ## _ ## y
  50 #define eval(x,y) concat (x,y)
  51 #define genname(f,t) eval(f, typesz (t))
  52
  53 #define func1(name, type) \
  54   type __attribute__((visibility("hidden"))) \
  55   genname (name, type) (type* x, type y, type z) \
  56   { \
  57     return __##name (x, y, z); \
  58   }
  59
  60 #define genfuncs(name) \
  61   func1 (name, uint8_t) \
  62   func1 (name, uint16_t) \
  63   func1 (name, uint32_t)
  64
  65 genfuncs (sync_lock_test_and_set)
  66 genfuncs (sync_val_compare_and_swap)
  67 genfuncs (sync_bool_compare_and_swap)
  68 genfuncs (sync_fetch_and_add)
  69 genfuncs (sync_fetch_and_or)
  70 genfuncs (sync_fetch_and_and)
  71 genfuncs (sync_fetch_and_xor)
  72 genfuncs (sync_fetch_and_sub)
  73 genfuncs (sync_fetch_and_nand)
  74 genfuncs (sync_add_and_fetch)
  75 genfuncs (sync_or_and_fetch)
  76 genfuncs (sync_and_and_fetch)
  77 genfuncs (sync_xor_and_fetch)
  78 genfuncs (sync_sub_and_fetch)
  79 genfuncs (sync_nand_and_fetch)
  80
  81 #endif