libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc

   1 // { dg-do compile { target i?86-*-* x86_64-*-* } }
   2 // { dg-options "-O2 -g0 -fno-exceptions -fno-asynchronous-unwind-tables" }
   3 // { dg-additional-options "-march=i486" { target ia32 } }
   4 // { dg-require-effective-target c++11 }
   5 // { dg-skip-if "scans fail with LTO" { lto } { "-flto" } }
   6 // { dg-final { scan-assembler-times "xacquire\|\.byte\[^\n\r]*0xf2" 14 } }
   7 // { dg-final { scan-assembler-times "xrelease\|\.byte\[^\n\r]*0xf3" 14 } }
   8
   9 // Copyright (C) 2008-2020 Free Software Foundation, Inc.
  10 //
  11 // This file is part of the GNU ISO C++ Library.  This library is free
  12 // software; you can redistribute it and/or modify it under the
  13 // terms of the GNU General Public License as published by the
  14 // Free Software Foundation; either version 3, or (at your option)
  15 // any later version.
  16
  17 // This library is distributed in the hope that it will be useful,
  18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 // GNU General Public License for more details.
  21
  22 // You should have received a copy of the GNU General Public License along
  23 // with this library; see the file COPYING3.  If not see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 #include <atomic>
  27
  28 const auto ACQ = std::memory_order_acquire | std::__memory_order_hle_acquire;
  29 const auto REL = std::memory_order_release | std::__memory_order_hle_release;
  30
  31 int main()
  32 {
  33   unsigned zero, one;
  34   using namespace std;
  35   atomic_flag af = ATOMIC_FLAG_INIT;
  36
  37   if (!af.test_and_set(ACQ))
  38     af.clear(REL);
  39
  40   atomic_uint au = ATOMIC_VAR_INIT(0);
  41
  42   if (au.exchange(1, ACQ))
  43     au.store(0, REL);
  44
  45   if (au.exchange(1, ACQ))
  46     au.exchange(0, REL);
  47
  48   zero = 0;
  49   one = 1;
  50   if (au.compare_exchange_weak(zero, 1, ACQ, memory_order_consume))
  51     au.compare_exchange_weak(one, 0, REL, memory_order_consume);
  52
  53   zero = 0;
  54   one = 1;
  55   if (au.compare_exchange_strong(zero, 1, ACQ, memory_order_consume))
  56     au.compare_exchange_strong(one, 0, REL, memory_order_consume);
  57
  58   if (!au.fetch_add(1, ACQ))
  59     au.fetch_add(-1, REL);
  60
  61   if (!au.fetch_sub(1, ACQ))
  62     au.fetch_sub(-1, REL);
  63
  64 #if 0 /* broken in underlying target */
  65   if (!au.fetch_and(1, ACQ))
  66     au.fetch_and(-1, REL);
  67
  68   if (!au.fetch_or(1, ACQ))
  69     au.fetch_or(-1, REL);
  70
  71   if (!au.fetch_xor(1, ACQ))
  72     au.fetch_xor(-1, REL);
  73
  74   if (!au.fetch_nand(1, ACQ))
  75     au.fetch_nand(-1, REL);
  76 #endif
  77
  78   volatile atomic_flag vaf = ATOMIC_FLAG_INIT;
  79
  80   if (!vaf.test_and_set(ACQ))
  81     vaf.clear(REL);
  82
  83   volatile atomic_uint vau = ATOMIC_VAR_INIT(0);
  84
  85   if (!vau.exchange(1, ACQ))
  86     vau.store(0, REL);
  87
  88   if (!vau.exchange(1, ACQ))
  89     vau.exchange(0, REL);
  90
  91   zero = 0;
  92   one = 1;
  93   if (vau.compare_exchange_weak(zero, 1, ACQ, memory_order_consume))
  94     vau.compare_exchange_weak(one, 0, REL, memory_order_consume);
  95
  96   zero = 0;
  97   one = 1;
  98   if (vau.compare_exchange_strong(zero, 1, ACQ, memory_order_consume))
  99     vau.compare_exchange_strong(one, 0, REL, memory_order_consume);
 100
 101   if (!vau.fetch_add(1, ACQ))
 102     vau.fetch_add(-1, REL);
 103
 104   if (!vau.fetch_sub(1, ACQ))
 105     vau.fetch_sub(-1, REL);
 106
 107 #if 0 /* broken in underlying target */
 108
 109   if (!vau.fetch_and(1, ACQ))
 110     vau.fetch_and(-1, REL);
 111
 112   if (!vau.fetch_or(1, ACQ))
 113     vau.fetch_or(-1, REL);
 114
 115   if (!vau.fetch_xor(1, ACQ))
 116     vau.fetch_xor(-1, REL);
 117
 118   if (!vau.fetch_nand(1, ACQ))
 119     vau.fetch_nand(-1, REL);
 120 #endif
 121
 122   return 0;
 123 }