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author | kan <kan@FreeBSD.org> | 2002-09-17 04:04:04 +0000 |
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committer | kan <kan@FreeBSD.org> | 2002-09-17 04:04:04 +0000 |
commit | d28dfe2607c93215301923596ce65ae6df3d4cd9 (patch) | |
tree | e1352a09cb44f9237c705b49ba032895f99b4cba /contrib/libstdc++/config/cpu | |
parent | 366976642281939a5ef910427ef046ec6f72af8a (diff) | |
download | FreeBSD-src-d28dfe2607c93215301923596ce65ae6df3d4cd9.zip FreeBSD-src-d28dfe2607c93215301923596ce65ae6df3d4cd9.tar.gz |
Gcc 3.2.1-prerelease C++ support bits from the FSF anoncvs repo gcc-3_2-branch on 16-Sep-2002 13:23:11 EDT.
Diffstat (limited to 'contrib/libstdc++/config/cpu')
-rw-r--r-- | contrib/libstdc++/config/cpu/sparc/bits/atomicity.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/contrib/libstdc++/config/cpu/sparc/bits/atomicity.h b/contrib/libstdc++/config/cpu/sparc/bits/atomicity.h new file mode 100644 index 0000000..23804db --- /dev/null +++ b/contrib/libstdc++/config/cpu/sparc/bits/atomicity.h @@ -0,0 +1,131 @@ +// Low-level functions for atomic operations: Sparc version -*- C++ -*- + +// Copyright (C) 1999, 2000, 2001, 2002 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// 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 _BITS_ATOMICITY_H +#define _BITS_ATOMICITY_H 1 + +#ifdef __arch64__ + +typedef long _Atomic_word; + +static inline _Atomic_word +__attribute__ ((__unused__)) +__exchange_and_add (volatile _Atomic_word *__mem, int __val) +{ + _Atomic_word __tmp1, __tmp2; + + __asm__ __volatile__("1: ldx [%2], %0\n\t" + " add %0, %3, %1\n\t" + " casx [%2], %0, %1\n\t" + " sub %0, %1, %0\n\t" + " brnz,pn %0, 1b\n\t" + " nop" + : "=&r" (__tmp1), "=&r" (__tmp2) + : "r" (__mem), "r" (__val) + : "memory"); + return __tmp2; +} + +static inline void +__attribute__ ((__unused__)) +__atomic_add (volatile _Atomic_word* __mem, int __val) +{ + _Atomic_word __tmp1, __tmp2; + + __asm__ __volatile__("1: ldx [%2], %0\n\t" + " add %0, %3, %1\n\t" + " casx [%2], %0, %1\n\t" + " sub %0, %1, %0\n\t" + " brnz,pn %0, 1b\n\t" + " nop" + : "=&r" (__tmp1), "=&r" (__tmp2) + : "r" (__mem), "r" (__val) + : "memory"); +} + +#else /* __arch32__ */ + +typedef int _Atomic_word; + +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; + +static int +__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; +} + +static 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__ */ + +#endif /* atomicity.h */ |