mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 08:30:00 +00:00
6600049466
1998-04-16 07:42 Geoff Keating <geoffk@ozemail.com.au> * Makeconfig [!build-static]: Link `static' binaries with libc_pic.a. Still need *FLAGS-.o because we still sometimes build .o files. * db2/Makefile: Don't build libndbm.a if !build-static. 1998-04-16 07:42 Geoff Keating <geoffk@ozemail.com.au> * configure.in: New test for broken gcc on PowerPC. * sysdeps/powerpc/atomicity.h: Use result of test. * linuxthreads/sysdeps/powerpc/pt-machine.h: Use result of test. * math/libm-test.c: Update many of the epsilon to match actual performance. * sysdeps/libm-ieee754/e_exp.c: Reduce the number of branches. * sysdeps/libm-ieee754/e_expf.c: Likewise. * sysdeps/libm-ieee754/s_exp2.c: Likewise. * sysdeps/libm-ieee754/s_exp2f.c: Likewise. * sysdeps/libm-ieee754/e_pow.c: Correct typo. * sysdeps/powerpc/elf/libc-start.c: New file. * sysdeps/powerpc/elf/start.S: New file, use libc-start. * sysdeps/powerpc/elf/start.c: Delete. * sysdeps/unix/sysv/linux/powerpc/Dist: Remove syscall.h * sysdeps/unix/sysv/linux/powerpc/syscall.h: Delete. It was unused. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Correct previous few patches.
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/* Low-level functions for atomic operations. PowerPC version.
|
|
Copyright (C) 1997, 1998 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>
|
|
|
|
#if BROKEN_PPC_ASM_CR0
|
|
# define __ATOMICITY_INLINE /* nothing */
|
|
#else
|
|
# define __ATOMICITY_INLINE inline
|
|
#endif
|
|
|
|
static __ATOMICITY_INLINE int
|
|
__attribute__ ((unused))
|
|
exchange_and_add (volatile uint32_t *mem, int val)
|
|
{
|
|
int tmp, result;
|
|
__asm__ __volatile__ ("\
|
|
0: lwarx %0,0,%2
|
|
add %1,%3,%0
|
|
stwcx. %1,0,%2
|
|
bne- 0b
|
|
" : "=&r"(result), "=&r"(tmp) : "r" (mem), "r"(val) : "cr0");
|
|
return result;
|
|
}
|
|
|
|
static __ATOMICITY_INLINE void
|
|
__attribute__ ((unused))
|
|
atomic_add (volatile uint32_t *mem, int val)
|
|
{
|
|
int tmp;
|
|
__asm__ __volatile__("\
|
|
0: lwarx %0,0,%1
|
|
add %0,%2,%0
|
|
stwcx. %0,0,%1
|
|
bne- 0b
|
|
" : "=&r"(tmp) : "r" (mem), "r"(val) : "cr0");
|
|
}
|
|
|
|
static __ATOMICITY_INLINE int
|
|
__attribute__ ((unused))
|
|
compare_and_swap (volatile long int *p, long int oldval, long int newval)
|
|
{
|
|
int result;
|
|
__asm__ __volatile__ ("\
|
|
0: lwarx %0,0,%1
|
|
xor. %0,%0,%2
|
|
cntlzw %0,%0
|
|
bne- 1f
|
|
stwcx. %3,0,%1
|
|
bne- 0b
|
|
1: srwi %0,%0,5
|
|
" : "=&r"(result) : "r"(p), "r"(oldval), "r"(newval) : "cr0");
|
|
return result;
|
|
}
|
|
|
|
static __ATOMICITY_INLINE long int
|
|
__attribute__ ((unused))
|
|
always_swap (volatile long int *p, long int newval)
|
|
{
|
|
long int result;
|
|
__asm__ __volatile__ ("\
|
|
0: lwarx %0,0,%1
|
|
stwcx. %2,0,%1
|
|
bne- 0b
|
|
" : "=&r"(result) : "r"(p), "r"(newval) : "cr0");
|
|
return result;
|
|
}
|
|
|
|
static __ATOMICITY_INLINE int
|
|
__attribute__ ((unused))
|
|
test_and_set (volatile long int *p, long int oldval, long int newval)
|
|
{
|
|
int result;
|
|
__asm__ __volatile__ ("\
|
|
0: lwarx %0,0,%1
|
|
xor. %0,%0,%2
|
|
cntlzw %0,%0
|
|
bne- 1f
|
|
stwcx. %3,0,%1
|
|
bne- 0b
|
|
1: srwi %0,%0,5
|
|
" : "=&r"(result) : "r"(p), "r"(oldval), "r"(newval) : "cr0");
|
|
return result;
|
|
}
|
|
|
|
#endif /* atomicity.h */
|