mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-21 00:50:04 +00:00
Update.
2003-03-20 Ulrich Drepper <drepper@redhat.com> * include/atomic.h: Define atomic_exchange and atomic_decrement_if_positive if not already defined. Add some __builtin_expect. * sysdeps/i386/i486/bits/atomic.h: Define atomic_exchange. * sysdeps/x86_64/bits/atomic.h: Likewise. * sysdeps/ia64/bits/atomic.h: Pretty printing. Define atomic_exchange. * sysdeps/powerpc/bits/atomic.h: Pretty printing. Define atomic_exchange, atomic_exchange_and_add, and atomic_decrement_if_positive
This commit is contained in:
Ulrich Drepper
parent
5132931e18
commit
f79466a8e9
12
ChangeLog
12
ChangeLog
@ -1,3 +1,15 @@
|
||||
2003-03-20 Ulrich Drepper <drepper@redhat.com>
|
||||
|
||||
* include/atomic.h: Define atomic_exchange and
|
||||
atomic_decrement_if_positive if not already defined. Add some
|
||||
__builtin_expect.
|
||||
* sysdeps/i386/i486/bits/atomic.h: Define atomic_exchange.
|
||||
* sysdeps/x86_64/bits/atomic.h: Likewise.
|
||||
* sysdeps/ia64/bits/atomic.h: Pretty printing. Define atomic_exchange.
|
||||
* sysdeps/powerpc/bits/atomic.h: Pretty printing. Define
|
||||
atomic_exchange, atomic_exchange_and_add, and
|
||||
atomic_decrement_if_positive
|
||||
|
||||
2003-03-20 Alexandre Oliva <aoliva@redhat.com>
|
||||
|
||||
* sysdeps/unix/sysv/linux/mips/mips64/n64/ioctl.S: Sign-extend
|
||||
|
||||
@ -119,6 +119,29 @@ typedef uintmax_t uatomic_max_t;
|
||||
#endif
|
||||
|
||||
|
||||
/* Note that we need no lock prefix. */
|
||||
#define atomic_exchange(mem, newvalue) \
|
||||
({ __typeof (*mem) result; \
|
||||
if (sizeof (*mem) == 1) \
|
||||
__asm __volatile ("xchgb %b0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else if (sizeof (*mem) == 2) \
|
||||
__asm __volatile ("xchgw %w0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else if (sizeof (*mem) == 4) \
|
||||
__asm __volatile ("xchgl %0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else \
|
||||
{ \
|
||||
result = 0; \
|
||||
abort (); \
|
||||
} \
|
||||
result; })
|
||||
|
||||
|
||||
#define atomic_exchange_and_add(mem, value) \
|
||||
({ __typeof (*mem) result; \
|
||||
__typeof (value) addval = (value); \
|
||||
|
||||
@ -55,7 +55,7 @@ typedef uintmax_t uatomic_max_t;
|
||||
(!__sync_bool_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
|
||||
(int) (long) (newval)))
|
||||
|
||||
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
|
||||
#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
|
||||
(!__sync_bool_compare_and_swap_di ((long *) (mem), (long) (oldval), \
|
||||
(long) (newval)))
|
||||
|
||||
@ -63,11 +63,15 @@ typedef uintmax_t uatomic_max_t;
|
||||
__sync_val_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
|
||||
(int) (long) (newval))
|
||||
|
||||
# define __arch_compare_and_exchange_64_val_acq(mem, newval, oldval) \
|
||||
#define __arch_compare_and_exchange_64_val_acq(mem, newval, oldval) \
|
||||
__sync_val_compare_and_swap_di ((long *) (mem), (long) (oldval), \
|
||||
(long) (newval))
|
||||
|
||||
# define atomic_exchange_and_add(mem, value) \
|
||||
/* Atomically store newval and return the old value. */
|
||||
#define atomic_exchange(mem, value) \
|
||||
__sync_lock_test_and_set_si (mem, value)
|
||||
|
||||
#define atomic_exchange_and_add(mem, value) \
|
||||
({ \
|
||||
__typeof (*mem) __oldval, __val; \
|
||||
__typeof (mem) __memp = (mem); \
|
||||
|
||||
@ -53,11 +53,11 @@ typedef uintmax_t uatomic_max_t;
|
||||
(abort (), 0)
|
||||
|
||||
#ifdef UP
|
||||
#define __ARCH_ACQ_INSTR ""
|
||||
#define __ARCH_REL_INSTR ""
|
||||
# define __ARCH_ACQ_INSTR ""
|
||||
# define __ARCH_REL_INSTR ""
|
||||
#else
|
||||
#define __ARCH_ACQ_INSTR "isync"
|
||||
#define __ARCH_REL_INSTR "sync"
|
||||
# define __ARCH_ACQ_INSTR "isync"
|
||||
# define __ARCH_REL_INSTR "sync"
|
||||
#endif
|
||||
|
||||
/*
|
||||
@ -86,7 +86,7 @@ typedef uintmax_t uatomic_max_t;
|
||||
})
|
||||
|
||||
#ifdef __powerpc64__
|
||||
#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
|
||||
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval)\
|
||||
({ \
|
||||
unsigned long __tmp; \
|
||||
__asm __volatile (__ARCH_REL_INSTR "\n" \
|
||||
@ -103,14 +103,64 @@ typedef uintmax_t uatomic_max_t;
|
||||
})
|
||||
|
||||
#else /* powerpc32 */
|
||||
#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
|
||||
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
|
||||
(abort (), 0)
|
||||
#endif
|
||||
|
||||
|
||||
#define atomic_exchange(mem, value) \
|
||||
({ if (sizeof (*mem) != 4) \
|
||||
abort (); \
|
||||
int __val, __tmp; \
|
||||
__asm __volatile (__ARCH_REL_INSTR "\n" \
|
||||
"1: lwarx %0,0,%2\n" \
|
||||
" stwcx. %3,0,%2\n" \
|
||||
" bne- 1b" \
|
||||
: "=&r" (__val), "=m" (*mem) \
|
||||
: "r" (mem), "r" (value), "1" (*mem) \
|
||||
: "cr0", "memory"); \
|
||||
__val; })
|
||||
|
||||
|
||||
#define atomic_exchange_and_add(mem, value) \
|
||||
({ if (sizeof (*mem) != 4) \
|
||||
abort (); \
|
||||
int __val, __tmp; \
|
||||
__asm __volatile ("1: lwarx %0,0,%3\n" \
|
||||
" addi %1,%0,%4\n" \
|
||||
" stwcx. %1,0,%3\n" \
|
||||
" bne- 1b" \
|
||||
: "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \
|
||||
: "r" (mem), "I" (value), "2" (*mem) \
|
||||
: "cr0"); \
|
||||
__val; \
|
||||
})
|
||||
|
||||
|
||||
/* Decrement *MEM if it is > 0, and return the old value. */
|
||||
#define atomic_decrement_if_positive(mem) \
|
||||
({ if (sizeof (*mem) != 4) \
|
||||
abort (); \
|
||||
int __val, __tmp; \
|
||||
__asm __volatile ("1: lwarx %0,0,%3\n" \
|
||||
" cmpwi 0,%0,0\n" \
|
||||
" addi %1,%0,-1\n" \
|
||||
" ble 2f\n" \
|
||||
" stwcx. %1,0,%3\n" \
|
||||
" bne- 1b\n" \
|
||||
"2: " __ARCH_ACQ_INSTR \
|
||||
: "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \
|
||||
: "r" (mem), "2" (*mem) \
|
||||
: "cr0"); \
|
||||
__val; \
|
||||
})
|
||||
|
||||
|
||||
|
||||
#define atomic_full_barrier() __asm ("sync" ::: "memory")
|
||||
#ifdef __powerpc64__
|
||||
#define atomic_read_barrier() __asm ("lwsync" ::: "memory")
|
||||
# define atomic_read_barrier() __asm ("lwsync" ::: "memory")
|
||||
#else
|
||||
#define atomic_read_barrier() __asm ("sync" ::: "memory")
|
||||
# define atomic_read_barrier() __asm ("sync" ::: "memory")
|
||||
#endif
|
||||
#define atomic_write_barrier() __asm ("eieio" ::: "memory")
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* Copyright (C) 2002 Free Software Foundation, Inc.
|
||||
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
||||
|
||||
@ -84,6 +84,28 @@ typedef uintmax_t uatomic_max_t;
|
||||
ret; })
|
||||
|
||||
|
||||
/* Note that we need no lock prefix. */
|
||||
#define atomic_exchange(mem, newvalue) \
|
||||
({ __typeof (*mem) result; \
|
||||
if (sizeof (*mem) == 1) \
|
||||
__asm __volatile ("xchgb %b0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else if (sizeof (*mem) == 2) \
|
||||
__asm __volatile ("xchgw %w0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else if (sizeof (*mem) == 4) \
|
||||
__asm __volatile ("xchgl %0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
else \
|
||||
__asm __volatile ("xchgq %q0, %1" \
|
||||
: "=r" (result), "=m" (*mem) \
|
||||
: "0" (newvalue), "1" (*mem)); \
|
||||
result; })
|
||||
|
||||
|
||||
#define atomic_exchange_and_add(mem, value) \
|
||||
({ __typeof (*mem) result; \
|
||||
if (sizeof (*mem) == 1) \
|
||||
|
||||
Loading…
Reference in New Issue
Block a user