diff options
Diffstat (limited to 'libstdc++/config/cpu/sparc')
| -rw-r--r-- | libstdc++/config/cpu/sparc/atomic_word.h | 53 | ||||
| -rw-r--r-- | libstdc++/config/cpu/sparc/atomicity.h | 127 |
2 files changed, 180 insertions, 0 deletions
diff --git a/libstdc++/config/cpu/sparc/atomic_word.h b/libstdc++/config/cpu/sparc/atomic_word.h new file mode 100644 index 0000000..b146045 --- /dev/null +++ b/libstdc++/config/cpu/sparc/atomic_word.h @@ -0,0 +1,53 @@ +// Low-level type for atomic operations -*- C++ -*- + +// Copyright (C) 2004 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +#ifndef _GLIBCXX_ATOMIC_WORD_H +#define _GLIBCXX_ATOMIC_WORD_H 1 + +#ifdef __arch64__ + typedef long _Atomic_word; +#else + typedef int _Atomic_word; +#endif + +#if defined(__sparc_v9__) +// These are necessary under the V9 RMO model, though it is almost never +// used in userspace. +#define _GLIBCXX_READ_MEM_BARRIER \ + __asm __volatile ("membar #LoadLoad":::"memory") +#define _GLIBCXX_WRITE_MEM_BARRIER \ + __asm __volatile ("membar #StoreStore":::"memory") + +#elif defined(__sparc_v8__) +// This is necessary under the PSO model. +#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("stbar":::"memory") + +#endif + +#endif diff --git a/libstdc++/config/cpu/sparc/atomicity.h b/libstdc++/config/cpu/sparc/atomicity.h new file mode 100644 index 0000000..5fec033 --- /dev/null +++ b/libstdc++/config/cpu/sparc/atomicity.h @@ -0,0 +1,127 @@ +// Low-level functions for atomic operations: Sparc version -*- C++ -*- + +// Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +#include <ext/atomicity.h> + +_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) + +#ifdef __arch64__ + _Atomic_word + __attribute__ ((__unused__)) + __exchange_and_add(volatile _Atomic_word* __mem, int __val) + { + _Atomic_word __tmp1, __tmp2; + _Atomic_word __val_extended = __val; + + __asm__ __volatile__("1: ldx [%3], %0\n\t" + " add %0, %4, %1\n\t" + " casx [%3], %0, %1\n\t" + " sub %0, %1, %0\n\t" + " brnz,pn %0, 1b\n\t" + " nop" + : "=&r" (__tmp1), "=&r" (__tmp2), "=m" (*__mem) + : "r" (__mem), "r" (__val_extended), "m" (*__mem)); + return __tmp2; + } + + void + __attribute__ ((__unused__)) + __atomic_add(volatile _Atomic_word* __mem, int __val) + { + _Atomic_word __tmp1, __tmp2; + _Atomic_word __val_extended = __val; + + __asm__ __volatile__("1: ldx [%3], %0\n\t" + " add %0, %4, %1\n\t" + " casx [%3], %0, %1\n\t" + " sub %0, %1, %0\n\t" + " brnz,pn %0, 1b\n\t" + " nop" + : "=&r" (__tmp1), "=&r" (__tmp2), "=m" (*__mem) + : "r" (__mem), "r" (__val_extended), "m" (*__mem)); + } + +#else /* __arch32__ */ + + template<int __inst> + struct _Atomicity_lock + { + static unsigned char _S_atomicity_lock; + }; + + template<int __inst> + unsigned char _Atomicity_lock<__inst>::_S_atomicity_lock = 0; + + template unsigned char _Atomicity_lock<0>::_S_atomicity_lock; + + _Atomic_word + __attribute__ ((__unused__)) + __exchange_and_add(volatile _Atomic_word* __mem, int __val) + { + _Atomic_word __result, __tmp; + + __asm__ __volatile__("1: ldstub [%1], %0\n\t" + " cmp %0, 0\n\t" + " bne 1b\n\t" + " nop" + : "=&r" (__tmp) + : "r" (&_Atomicity_lock<0>::_S_atomicity_lock) + : "memory"); + __result = *__mem; + *__mem += __val; + __asm__ __volatile__("stb %%g0, [%0]" + : /* no outputs */ + : "r" (&_Atomicity_lock<0>::_S_atomicity_lock) + : "memory"); + return __result; + } + + void + __attribute__ ((__unused__)) + __atomic_add(volatile _Atomic_word* __mem, int __val) + { + _Atomic_word __tmp; + + __asm__ __volatile__("1: ldstub [%1], %0\n\t" + " cmp %0, 0\n\t" + " bne 1b\n\t" + " nop" + : "=&r" (__tmp) + : "r" (&_Atomicity_lock<0>::_S_atomicity_lock) + : "memory"); + *__mem += __val; + __asm__ __volatile__("stb %%g0, [%0]" + : /* no outputs */ + : "r" (&_Atomicity_lock<0>::_S_atomicity_lock) + : "memory"); + } +#endif /* __arch32__ */ + +_GLIBCXX_END_NAMESPACE |
