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0585697658
2002-07-24 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/arm/ioperm.c (init_iosys): Yield ENODEV on unknown systems. 2003-02-20 Franz Sirl <Franz.Sirl-kernel@lauterbach.com> * sysdeps/powerpc/powerpc32/atomicity.h: Remove compiler workaround. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_NEW_PRCTL_SYSCALL): Defined for ppc32 too. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fe_nomask.c: Use prctl if possible. * sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Avoid short interprocedure branches. * sysdeps/powerpc/soft-fp/Dist (sim-full.c, fenv_const.c): Move to... * sysdeps/powerpc/nofpu/Dist: ...here. * sysdeps/unix/sysv/linux/powerpc/Dist (fe_nomask.c): Move to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/Dist: ...here. * sysdeps/unix/sysv/linux/s390/s390-64/Dist (kernel_stat.h): Delete. * sysdeps/unix/sysv/linux/sparc/Dist (bits/utmpx.h): Delete. * sysdeps/unix/sysv/linux/x86_64/Dist (bits/utmpx.h): Delete.
99 lines
2.5 KiB
C
99 lines
2.5 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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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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static 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 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 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 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 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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