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configure.target (cpu_include_dir): Set to `config/cpu/mips' for mips.

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2001-07-25  H.J. Lu <hjl@gnu.org>

	* configure.target (cpu_include_dir): Set to `config/cpu/mips'
	for mips.

	* config/cpu/mips/bits/atomicity.h: New.

[[Split portion of a mixed commit.]]

From-SVN: r44374.2
This commit is contained in:
H.J. Lu 2001-07-25 22:04:48 -07:00
parent 17eee61c6d
commit 95b02d7e3a
1 changed files with 138 additions and 0 deletions
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138
libstdc++-v3/config/cpu/mips/bits/atomicity.h Normal file
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// Low-level functions for atomic operations. Mips version.
// Copyright (C) 2001 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
#include <sgidefs.h>
typedef int _Atomic_word;
#if (_MIPS_ISA >= _MIPS_ISA_MIPS2)
static inline int
__attribute__ ((unused))
__exchange_and_add (volatile _Atomic_word *__mem, int __val)
{
int __result, __tmp;
__asm__ __volatile__
("/* Inline exchange & add */\n\t"
"1:\n\t"
"ll %0,%3\n\t"
"addu %1,%4,%0\n\t"
"sc %1,%2\n\t"
"beqz %1,1b\n\t"
"/* End exchange & add */"
: "=&r"(__result), "=&r"(__tmp), "=m"(*__mem)
: "m" (*__mem), "r"(__val)
: "memory");
return __result;
}
static inline void
__attribute__ ((unused))
__atomic_add (volatile _Atomic_word *__mem, int __val)
{
int __result;
__asm__ __volatile__
("/* Inline atomic add */\n\t"
"1:\n\t"
"ll %0,%2\n\t"
"addu %0,%3,%0\n\t"
"sc %0,%1\n\t"
"beqz %0,1b\n\t"
"/* End atomic add */"
: "=&r"(__result), "=m"(*__mem)
: "m" (*__mem), "r"(__val)
: "memory");
}
static inline int
__attribute__ ((unused))
__compare_and_swap (volatile long int *__p, long int __oldval,
long int __newval)
{
long int __ret;
__asm__ __volatile__
("/* Inline compare & swap */\n\t"
"1:\n\t"
"ll %0,%4\n\t"
".set push\n"
".set noreorder\n\t"
"bne %0,%2,2f\n\t"
"move %0,%3\n\t"
".set pop\n\t"
"sc %0,%1\n\t"
"beqz %0,1b\n"
"2:\n\t"
"/* End compare & swap */"
: "=&r" (__ret), "=m" (*__p)
: "r" (__oldval), "r" (__newval), "m" (*__p)
: "memory");
return __ret;
}
#else /* (_MIPS_ISA >= _MIPS_ISA_MIPS2) */
static inline int
__attribute__ ((unused))
__exchange_and_add (volatile _Atomic_word *__mem, int __val)
{
int __result = *__mem;
*__mem += __val;
return __result;
}
static inline void
__attribute__ ((unused))
__atomic_add (volatile _Atomic_word *__mem, int __val)
{
*__mem += __val;
}
static inline int
__attribute__ ((unused))
__compare_and_swap (volatile long int *__p, long int __oldval,
long int __newval)
{
if (*__p != __oldval)
return 0;
*__p = __newval;
return 1;
}
#endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */
#endif /* atomicity.h */