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author | Ulrich Drepper <drepper@redhat.com> | 1999-05-18 09:48:05 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1999-05-18 09:48:05 +0000 |
commit | 1acf7665c7b5f1d65b322de82065c4eaec623afe (patch) | |
tree | 09312155fcdcf84d7611ee61771306e42000f83d /sysdeps/sparc/sparc32/sparcv9/atomicity.h | |
parent | 2a269cd083e6e40255952e4300178b819514cca7 (diff) | |
download | glibc-1acf7665c7b5f1d65b322de82065c4eaec623afe.tar.gz glibc-1acf7665c7b5f1d65b322de82065c4eaec623afe.tar.xz glibc-1acf7665c7b5f1d65b322de82065c4eaec623afe.zip |
Update.
1999-05-18 Ulrich Drepper <drepper@cygnus.com> * sysdeps/wordsize-64/stdint.h (INTPTR_MAX): Add missing ). 1999-05-17 David S. Miller <davem@redhat.com> * sysdeps/sparc/sparc32/atomicity.h: New file. * sysdeps/sparc/sparc32/sparcv9/atomicity.h: New file. * sysdeps/sparc/sparc64/atomicity.h: New file. * sysdeps/sparc/sparc32/sparcv9/Makefile: Add -Wa,-Av9a to sysdep-CFLAGS.
Diffstat (limited to 'sysdeps/sparc/sparc32/sparcv9/atomicity.h')
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/atomicity.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc32/sparcv9/atomicity.h b/sysdeps/sparc/sparc32/sparcv9/atomicity.h new file mode 100644 index 0000000000..a8ca0cc249 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/atomicity.h @@ -0,0 +1,82 @@ +/* Low-level functions for atomic operations. Sparc32+v9 version. + Copyright (C) 1999 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 _ATOMICITY_H +#define _ATOMICITY_H 1 + +#include <inttypes.h> + +static inline int +__attribute__ ((unused)) +exchange_and_add (volatile uint32_t *mem, int val) +{ + uint32_t tmp1, tmp2; + + __asm__ __volatile__("1: lduw [%2], %0\n\t" + " add %0, %3, %1\n\t" + " cas [%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 uint32_t *mem, int val) +{ + uint32_t tmp1, tmp2; + + __asm__ __volatile__("1: lduw [%2], %0\n\t" + " add %0, %3, %1\n\t" + " cas [%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"); +} + +static inline int +__attribute__ ((unused)) +compare_and_swap (volatile long int *p, long int oldval, long int newval) +{ + register long int tmp, tmp2; + + __asm__ __volatile__("1: lduw [%4], %0\n\t" + " mov %2, %1\n\t" + " cmp %0, %3\n\t" + " bne,a,pn %%xcc, 2f\n\t" + " mov 0, %0\n\t" + " cas [%4], %0, %1\n\t" + " sub %0, %1, %0\n\t" + " brnz,pn %0, 1b\n\t" + " mov 1, %0\n\t" + "2:" + : "=&r" (tmp), "=&r" (tmp2) + : "r" (newval), "r" (oldval), "r" (p) + : "memory"); + return tmp; +} + +#endif /* atomicity.h */ |