87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
|
|
Copyright (C) 2004-2008 Grame
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
#ifndef __JackAtomic_linux__
|
|
#define __JackAtomic_linux__
|
|
|
|
#include "JackTypes.h"
|
|
|
|
#ifdef __PPC__
|
|
|
|
static inline int CAS(register UInt32 value, register UInt32 newvalue, register volatile void* addr)
|
|
{
|
|
register int result;
|
|
register UInt32 tmp;
|
|
asm volatile (
|
|
"# CAS \n"
|
|
" lwarx %4, 0, %1 \n" // creates a reservation on addr
|
|
" cmpw %4, %2 \n" // test value at addr
|
|
" bne- 1f \n"
|
|
" sync \n" // synchronize instructions
|
|
" stwcx. %3, 0, %1 \n" // if the reservation is not altered
|
|
// stores the new value at addr
|
|
" bne- 1f \n"
|
|
" li %0, 1 \n"
|
|
" b 2f \n"
|
|
"1: \n"
|
|
" li %0, 0 \n"
|
|
"2: \n"
|
|
: "=r" (result)
|
|
: "r" (addr), "r" (value), "r" (newvalue), "r" (tmp)
|
|
);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
|
|
#define LOCK "lock ; "
|
|
|
|
static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr)
|
|
{
|
|
register char ret;
|
|
__asm__ __volatile__ (
|
|
"# CAS \n\t"
|
|
LOCK "cmpxchg %2, (%1) \n\t"
|
|
"sete %0 \n\t"
|
|
: "=a" (ret)
|
|
: "c" (addr), "d" (newvalue), "a" (value)
|
|
);
|
|
return ret;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if !defined(__i386__) && !defined(__x86_64__) && !defined(__PPC__)
|
|
|
|
|
|
static inline char CAS(volatile UInt32 value, UInt32 newvalue, volatile void* addr)
|
|
{
|
|
return __sync_bool_compare_and_swap ((UInt32*)addr, value, newvalue);
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif
|
|
|