c891b2df08
2001-04-03 Ulrich Drepper <drepper@redhat.com> * misc/dirname.c (dirname): Handle multiple slashes correctly. 2001-04-03 Martin Schwidefsky <schwidefsky@de.ibm.com> * sysdeps/s390/s390-64/initfini.c: Fix __gmon_start__ GOT access. 2001-04-03 Martin Schwidefsky <schwidefsky@de.ibm.com> * sysdeps/s390/s390-32/bcopy.S: Optimize for speed. * sysdeps/s390/s390-64/bcopy.S: Likewise. * sysdeps/s390/s390-32/mempcy.S: Likewise. * sysdeps/s390/s390-64/memcpy.S: Likewise. 2001-04-02 Bruno Haible <haible@clisp.cons.org> * manual/message.texi (Advanced gettext functions): More specific syntax in the plural formula examples. 2001-04-02 Franz Sirl <Franz.Sirl-kernel@lauterbach.com> * sysdeps/powerpc/atomicity.h: Silence warnings. * sysdeps/powerpc/dl-machine.h: Likewise. * sysdeps/powerpc/register-dump.h: Likewise. * sysdeps/powerpc/fpu/s_lrint.c: Likewise. 2001-04-02 Andreas Jaeger <aj@suse.de> * misc/tst-dirname.c (main): Add more tests, derived from a bug report by Michael Kerrisk <mtk16@ext.canterbury.ac.nz>. 2001-04-01 Andreas Jaeger <aj@suse.de> * debug/xtrace.sh (pcprofileso): Use SLIBDIR since libpcprofile.so is installed there. * malloc/memusage.sh (memusageso): Likewise for libmemusage.so. 2001-04-01 H.J. Lu <hjl@gnu.org> * posix/annexc.c (macrofile): Renamed from TMPFILE and set to tmpnam (NULL). * stdlib/isomac.c (macrofile): Likewise. 2001-03-30 Thorsten Kukuk <kukuk@suse.de> * inet/rcmd.c: Allow AF_UNSPEC as parameter. * nis/ypclnt.c (yp_all): Print error message only at last try, check for protocoll error only if we don't have a network error.
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/* Low-level functions for atomic operations. PowerPC version.
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _ATOMICITY_H
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#define _ATOMICITY_H 1
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#include <inttypes.h>
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#if BROKEN_PPC_ASM_CR0
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# define __ATOMICITY_INLINE /* nothing */
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#else
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# define __ATOMICITY_INLINE inline
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#endif
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static __ATOMICITY_INLINE int
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__attribute__ ((unused))
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exchange_and_add (volatile uint32_t *mem, int val)
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{
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int tmp, result;
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__asm__ ("\n\
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0: lwarx %0,0,%2 \n\
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add%I3 %1,%0,%3 \n\
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stwcx. %1,0,%2 \n\
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bne- 0b \n\
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" : "=&b"(result), "=&r"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
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return result;
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}
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static __ATOMICITY_INLINE void
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__attribute__ ((unused))
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atomic_add (volatile uint32_t *mem, int val)
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{
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int tmp;
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__asm__ ("\n\
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0: lwarx %0,0,%1 \n\
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add%I2 %0,%0,%2 \n\
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stwcx. %0,0,%1 \n\
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bne- 0b \n\
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" : "=&b"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
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}
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static __ATOMICITY_INLINE int
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__attribute__ ((unused))
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compare_and_swap (volatile long int *p, long int oldval, long int newval)
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{
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int result;
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__asm__ ("\n\
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0: lwarx %0,0,%1 \n\
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sub%I2c. %0,%0,%2 \n\
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cntlzw %0,%0 \n\
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bne- 1f \n\
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stwcx. %3,0,%1 \n\
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bne- 0b \n\
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1: \n\
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" : "=&b"(result) : "r"(p), "Ir"(oldval), "r"(newval) : "cr0", "memory");
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return result >> 5;
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}
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static __ATOMICITY_INLINE long int
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__attribute__ ((unused))
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always_swap (volatile long int *p, long int newval)
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{
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long int result;
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__asm__ ("\n\
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0: lwarx %0,0,%1 \n\
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stwcx. %2,0,%1 \n\
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bne- 0b \n\
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" : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");
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return result;
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}
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static __ATOMICITY_INLINE int
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__attribute__ ((unused))
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test_and_set (volatile long int *p, long int newval)
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{
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int result;
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__asm__ ("\n\
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0: lwarx %0,0,%1 \n\
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cmpwi %0,0 \n\
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bne- 1f \n\
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stwcx. %2,0,%1 \n\
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bne- 0b \n\
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1: \n\
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" : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");
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return result;
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}
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#endif /* atomicity.h */
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