From c7ab9bc89093a9c0f93df177850eb587c3267212 Mon Sep 17 00:00:00 2001 From: bkoz Date: Thu, 25 May 2000 10:04:12 +0000 Subject: [PATCH] 2000-05-19 Nathan "I don't write ChangeLog Entries" Myers * config/cpu/i486: New directory. * config/cpu/i486/bits: New directory. * config/cpu/i486/bits/atomicity.h: New file. * config/cpu/i386/bits/atomicity.h (__compare_and_swap): Delete 'cmpxchgl' asm. * acinclude.m4 (GLIBCPP_CHECK_CPU): Enable i386. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@34160 138bc75d-0d04-0410-961f-82ee72b054a4 --- libstdc++-v3/config/cpu/i386/bits/atomicity.h | 13 ------ libstdc++-v3/config/cpu/i486/bits/atomicity.h | 58 +++++++++++++++++++++++++++ 2 files changed, 58 insertions(+), 13 deletions(-) create mode 100644 libstdc++-v3/config/cpu/i486/bits/atomicity.h diff --git a/libstdc++-v3/config/cpu/i386/bits/atomicity.h b/libstdc++-v3/config/cpu/i386/bits/atomicity.h index f7d0381bb44..6ef55b25e8f 100644 --- a/libstdc++-v3/config/cpu/i386/bits/atomicity.h +++ b/libstdc++-v3/config/cpu/i386/bits/atomicity.h @@ -42,17 +42,4 @@ __atomic_add (volatile _Atomic_word* __mem, int __val) : : "ir" (__val), "m" (*__mem) : "memory"); } -static inline char -__attribute__ ((unused)) -__compare_and_swap (volatile long* __p, long __oldval, long __newval) -{ - char __ret; - long __readval; - - __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0" - : "=q" (__ret), "=m" (*__p), "=a" (__readval) - : "r" (__newval), "m" (*__p), "a" (__oldval)); - return __ret; -} - #endif /* atomicity.h */ diff --git a/libstdc++-v3/config/cpu/i486/bits/atomicity.h b/libstdc++-v3/config/cpu/i486/bits/atomicity.h new file mode 100644 index 00000000000..f7d0381bb44 --- /dev/null +++ b/libstdc++-v3/config/cpu/i486/bits/atomicity.h @@ -0,0 +1,58 @@ +/* Low-level functions for atomic operations. ix86 version, x >= 4. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _BITS_ATOMICITY_H +#define _BITS_ATOMICITY_H 1 + +typedef int _Atomic_word; + +static inline _Atomic_word +__attribute__ ((unused)) +__exchange_and_add (volatile _Atomic_word *__mem, int __val) +{ + register _Atomic_word __result; + __asm__ __volatile__ ("lock; xaddl %0,%2" + : "=r" (__result) + : "0" (__val), "m" (*__mem) + : "memory"); + return __result; +} + +static inline void +__attribute__ ((unused)) +__atomic_add (volatile _Atomic_word* __mem, int __val) +{ + __asm__ __volatile__ ("lock; addl %0,%1" + : : "ir" (__val), "m" (*__mem) : "memory"); +} + +static inline char +__attribute__ ((unused)) +__compare_and_swap (volatile long* __p, long __oldval, long __newval) +{ + char __ret; + long __readval; + + __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0" + : "=q" (__ret), "=m" (*__p), "=a" (__readval) + : "r" (__newval), "m" (*__p), "a" (__oldval)); + return __ret; +} + +#endif /* atomicity.h */ -- 2.11.0