From a334319f6530564d22e775935d9c91663623a1b4 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 22 Dec 2004 20:10:10 +0000 Subject: (CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4. --- sysdeps/mips/atomicity.h | 113 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 sysdeps/mips/atomicity.h (limited to 'sysdeps/mips/atomicity.h') diff --git a/sysdeps/mips/atomicity.h b/sysdeps/mips/atomicity.h new file mode 100644 index 0000000000..7380e1000c --- /dev/null +++ b/sysdeps/mips/atomicity.h @@ -0,0 +1,113 @@ +/* Low-level functions for atomic operations. Mips version. + Copyright (C) 2001, 2002, 2003, 2004 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 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. + + 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _MIPS_ATOMICITY_H +#define _MIPS_ATOMICITY_H 1 + +#include +#include + +static inline int +__attribute__ ((unused)) +exchange_and_add (volatile uint32_t *mem, int val) +{ + int result, tmp; + + __asm__ __volatile__ + ("/* Inline exchange & add */\n" + "1:\n\t" + ".set push\n\t" +#if _MIPS_SIM == _ABIO32 + ".set mips2\n\t" +#endif + "ll %0,%3\n\t" + "addu %1,%4,%0\n\t" + "sc %1,%2\n\t" + ".set pop\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 uint32_t *mem, int val) +{ + int result; + + __asm__ __volatile__ + ("/* Inline atomic add */\n" + "1:\n\t" + ".set push\n\t" +#if _MIPS_SIM == _ABIO32 + ".set mips2\n\t" +#endif + "ll %0,%2\n\t" + "addu %0,%3,%0\n\t" + "sc %0,%1\n\t" + ".set pop\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, temp; + + __asm__ __volatile__ + ("/* Inline compare & swap */\n" + "1:\n\t" + ".set push\n\t" +#if _MIPS_SIM == _ABIO32 + ".set mips2\n\t" +#endif +#if _MIPS_SIM == _ABI64 + "lld %1,%5\n\t" +#else + "ll %1,%5\n\t" +#endif + "move %0,$0\n\t" + "bne %1,%3,2f\n\t" + "move %0,%4\n\t" +#if _MIPS_SIM == _ABI64 + "scd %0,%2\n\t" +#else + "sc %0,%2\n\t" +#endif + ".set pop\n\t" + "beqz %0,1b\n" + "2:\n\t" + "/* End compare & swap */" + : "=&r" (ret), "=&r" (temp), "=m" (*p) + : "r" (oldval), "r" (newval), "m" (*p) + : "memory"); + + return ret; +} + +#endif /* atomicity.h */ -- cgit 1.4.1