diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/bits/atomic.h')
| -rw-r--r-- | sysdeps/sparc/sparc32/bits/atomic.h | 260 |
1 files changed, 9 insertions, 251 deletions
diff --git a/sysdeps/sparc/sparc32/bits/atomic.h b/sysdeps/sparc/sparc32/bits/atomic.h index ef553f7270..736372a3d4 100644 --- a/sysdeps/sparc/sparc32/bits/atomic.h +++ b/sysdeps/sparc/sparc32/bits/atomic.h @@ -1,5 +1,5 @@ /* Atomic operations. sparc32 version. - Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. @@ -21,34 +21,6 @@ #ifndef _BITS_ATOMIC_H #define _BITS_ATOMIC_H 1 -#include <stdint.h> - -typedef int8_t atomic8_t; -typedef uint8_t uatomic8_t; -typedef int_fast8_t atomic_fast8_t; -typedef uint_fast8_t uatomic_fast8_t; - -typedef int16_t atomic16_t; -typedef uint16_t uatomic16_t; -typedef int_fast16_t atomic_fast16_t; -typedef uint_fast16_t uatomic_fast16_t; - -typedef int32_t atomic32_t; -typedef uint32_t uatomic32_t; -typedef int_fast32_t atomic_fast32_t; -typedef uint_fast32_t uatomic_fast32_t; - -typedef int64_t atomic64_t; -typedef uint64_t uatomic64_t; -typedef int_fast64_t atomic_fast64_t; -typedef uint_fast64_t uatomic_fast64_t; - -typedef intptr_t atomicptr_t; -typedef uintptr_t uatomicptr_t; -typedef intmax_t atomic_max_t; -typedef uintmax_t uatomic_max_t; - - /* We have no compare and swap, just test and set. The following implementation contends on 64 global locks per library and assumes no variable will be accessed using atomic.h @@ -69,65 +41,22 @@ volatile unsigned char __sparc32_atomic_locks[64] unsigned int __idx = (((long) addr >> 2) ^ ((long) addr >> 12)) \ & 63; \ do \ - __asm __volatile ("ldstub %1, %0" \ - : "=r" (__old_lock), \ - "=m" (__sparc32_atomic_locks[__idx]) \ - : "m" (__sparc32_atomic_locks[__idx]) \ - : "memory"); \ + __asm ("ldstub %1, %0" \ + : "=r" (__old_lock), \ + "=m" (__sparc32_atomic_locks[__idx]) \ + : "m" (__sparc32_atomic_locks[__idx])); \ while (__old_lock); \ } \ while (0) #define __sparc32_atomic_do_unlock(addr) \ do \ - { \ - __sparc32_atomic_locks[(((long) addr >> 2) \ - ^ ((long) addr >> 12)) & 63] = 0; \ - __asm __volatile ("" ::: "memory"); \ - } \ - while (0) - -#define __sparc32_atomic_do_lock24(addr) \ - do \ - { \ - unsigned int __old_lock; \ - do \ - __asm __volatile ("ldstub %1, %0" \ - : "=r" (__old_lock), "=m" (*(addr)) \ - : "m" (*(addr)) \ - : "memory"); \ - while (__old_lock); \ - } \ + __sparc32_atomic_locks[(((long) addr >> 2) \ + ^ ((long) addr >> 12)) & 63] = 0; \ while (0) -#define __sparc32_atomic_do_unlock24(addr) \ - do \ - { \ - *(char *) (addr) = 0; \ - __asm __volatile ("" ::: "memory"); \ - } \ - while (0) - - -#ifndef SHARED -# define __v9_compare_and_exchange_val_32_acq(mem, newval, oldval) \ -({ \ - register __typeof (*(mem)) __acev_tmp __asm ("%g6"); \ - register __typeof (mem) __acev_mem __asm ("%g1") = (mem); \ - register __typeof (*(mem)) __acev_oldval __asm ("%g5"); \ - __acev_tmp = (newval); \ - __acev_oldval = (oldval); \ - /* .word 0xcde05005 is cas [%g1], %g5, %g6. Can't use cas here though, \ - because as will then mark the object file as V8+ arch. */ \ - __asm __volatile (".word 0xcde05005" \ - : "+r" (__acev_tmp), "=m" (*__acev_mem) \ - : "r" (__acev_oldval), "m" (*__acev_mem), \ - "r" (__acev_mem) : "memory"); \ - __acev_tmp; }) -#endif - /* The only basic operation needed is compare and exchange. */ -#define __v7_compare_and_exchange_val_acq(mem, newval, oldval) \ +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ ({ __typeof (mem) __acev_memp = (mem); \ __typeof (*mem) __acev_ret; \ __typeof (*mem) __acev_newval = (newval); \ @@ -139,7 +68,7 @@ volatile unsigned char __sparc32_atomic_locks[64] __sparc32_atomic_do_unlock (__acev_memp); \ __acev_ret; }) -#define __v7_compare_and_exchange_bool_acq(mem, newval, oldval) \ +#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ ({ __typeof (mem) __aceb_memp = (mem); \ int __aceb_ret; \ __typeof (*mem) __aceb_newval = (newval); \ @@ -153,175 +82,4 @@ volatile unsigned char __sparc32_atomic_locks[64] __sparc32_atomic_do_unlock (__aceb_memp); \ __aceb_ret; }) -#define __v7_exchange_acq(mem, newval) \ - ({ __typeof (mem) __acev_memp = (mem); \ - __typeof (*mem) __acev_ret; \ - __typeof (*mem) __acev_newval = (newval); \ - \ - __sparc32_atomic_do_lock (__acev_memp); \ - __acev_ret = *__acev_memp; \ - *__acev_memp = __acev_newval; \ - __sparc32_atomic_do_unlock (__acev_memp); \ - __acev_ret; }) - -#define __v7_exchange_and_add(mem, value) \ - ({ __typeof (mem) __acev_memp = (mem); \ - __typeof (*mem) __acev_ret; \ - \ - __sparc32_atomic_do_lock (__acev_memp); \ - __acev_ret = *__acev_memp; \ - *__acev_memp = __acev_ret + (value); \ - __sparc32_atomic_do_unlock (__acev_memp); \ - __acev_ret; }) - -/* Special versions, which guarantee that top 8 bits of all values - are cleared and use those bits as the ldstub lock. */ -#define __v7_compare_and_exchange_val_24_acq(mem, newval, oldval) \ - ({ __typeof (mem) __acev_memp = (mem); \ - __typeof (*mem) __acev_ret; \ - __typeof (*mem) __acev_newval = (newval); \ - \ - __sparc32_atomic_do_lock24 (__acev_memp); \ - __acev_ret = *__acev_memp & 0xffffff; \ - if (__acev_ret == (oldval)) \ - *__acev_memp = __acev_newval; \ - else \ - __sparc32_atomic_do_unlock24 (__acev_memp); \ - __asm __volatile ("" ::: "memory"); \ - __acev_ret; }) - -#define __v7_exchange_24_rel(mem, newval) \ - ({ __typeof (mem) __acev_memp = (mem); \ - __typeof (*mem) __acev_ret; \ - __typeof (*mem) __acev_newval = (newval); \ - \ - __sparc32_atomic_do_lock24 (__acev_memp); \ - __acev_ret = *__acev_memp & 0xffffff; \ - *__acev_memp = __acev_newval; \ - __asm __volatile ("" ::: "memory"); \ - __acev_ret; }) - -#ifdef SHARED - -/* When dynamically linked, we assume pre-v9 libraries are only ever - used on pre-v9 CPU. */ -# define __atomic_is_v9 0 - -# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ - __v7_compare_and_exchange_val_acq (mem, newval, oldval) - -# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ - __v7_compare_and_exchange_bool_acq (mem, newval, oldval) - -# define atomic_exchange_acq(mem, newval) \ - __v7_exchange_acq (mem, newval) - -# define atomic_exchange_and_add(mem, value) \ - __v7_exchange_and_add (mem, value) - -# define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \ - ({ \ - if (sizeof (*mem) != 4) \ - abort (); \ - __v7_compare_and_exchange_val_24_acq (mem, newval, oldval); }) - -# define atomic_exchange_24_rel(mem, newval) \ - ({ \ - if (sizeof (*mem) != 4) \ - abort (); \ - __v7_exchange_24_rel (mem, newval); }) - -#else - -/* In libc.a/libpthread.a etc. we don't know if we'll be run on - pre-v9 or v9 CPU. To be interoperable with dynamically linked - apps on v9 CPUs e.g. with process shared primitives, use cas insn - on v9 CPUs and ldstub on pre-v9. */ - -/* Avoid <ldsodefs.h> include here. */ -extern uint64_t _dl_hwcap __attribute__((weak)); -# define __ATOMIC_HWCAP_SPARC_V9 16 -# define __atomic_is_v9 \ - (__builtin_expect (&_dl_hwcap != 0, 1) \ - && __builtin_expect (_dl_hwcap & __ATOMIC_HWCAP_SPARC_V9, \ - __ATOMIC_HWCAP_SPARC_V9)) - -# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ - ({ \ - __typeof (*mem) __acev_wret; \ - if (sizeof (*mem) != 4) \ - abort (); \ - if (__atomic_is_v9) \ - __acev_wret \ - = __v9_compare_and_exchange_val_32_acq (mem, newval, oldval);\ - else \ - __acev_wret \ - = __v7_compare_and_exchange_val_acq (mem, newval, oldval); \ - __acev_wret; }) - -# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ - ({ \ - int __acev_wret; \ - if (sizeof (*mem) != 4) \ - abort (); \ - if (__atomic_is_v9) \ - { \ - __typeof (oldval) __acev_woldval = (oldval); \ - __acev_wret \ - = __v9_compare_and_exchange_val_32_acq (mem, newval, \ - __acev_woldval) \ - != __acev_woldval; \ - } \ - else \ - __acev_wret \ - = __v7_compare_and_exchange_bool_acq (mem, newval, oldval); \ - __acev_wret; }) - -# define atomic_exchange_rel(mem, newval) \ - ({ \ - __typeof (*mem) __acev_wret; \ - if (sizeof (*mem) != 4) \ - abort (); \ - if (__atomic_is_v9) \ - { \ - __typeof (mem) __acev_wmemp = (mem); \ - __typeof (*(mem)) __acev_wval = (newval); \ - do \ - __acev_wret = *__acev_wmemp; \ - while (__builtin_expect \ - (__v9_compare_and_exchange_val_32_acq (__acev_wmemp,\ - __acev_wval, \ - __acev_wret) \ - != __acev_wret, 0)); \ - } \ - else \ - __acev_wret = __v7_exchange_acq (mem, newval); \ - __acev_wret; }) - -# define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \ - ({ \ - __typeof (*mem) __acev_wret; \ - if (sizeof (*mem) != 4) \ - abort (); \ - if (__atomic_is_v9) \ - __acev_wret \ - = __v9_compare_and_exchange_val_32_acq (mem, newval, oldval);\ - else \ - __acev_wret \ - = __v7_compare_and_exchange_val_24_acq (mem, newval, oldval);\ - __acev_wret; }) - -# define atomic_exchange_24_rel(mem, newval) \ - ({ \ - __typeof (*mem) __acev_w24ret; \ - if (sizeof (*mem) != 4) \ - abort (); \ - if (__atomic_is_v9) \ - __acev_w24ret = atomic_exchange_rel (mem, newval); \ - else \ - __acev_w24ret = __v7_exchange_24_rel (mem, newval); \ - __acev_w24ret; }) - -#endif - #endif /* bits/atomic.h */ |