From 9e4a9f69dd74c47a7d84c1233164acfae7602a9f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 6 Nov 2016 19:01:31 -0800 Subject: [PATCH] sparc: On 32-bit, provide atomics via kernel assist. Signed-off-by: David S. Miller --- sysdeps/sparc/sparc32/atomic-machine.h | 313 ++------------------- sysdeps/sparc/sparc32/pthread_barrier_wait.c | 1 - sysdeps/sparc/sparc32/sem_post.c | 82 ------ sysdeps/sparc/sparc32/sem_waitcommon.c | 146 ---------- .../sparc/sparc32/sparcv9/pthread_barrier_wait.c | 1 - sysdeps/sparc/sparc32/sparcv9/sem_post.c | 1 - sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c | 1 - .../unix/sysv/linux/sparc/sparc32/atomic-machine.h | 35 +++ .../linux/sparc/sparc32/sparcv9/atomic-machine.h | 1 + 9 files changed, 55 insertions(+), 526 deletions(-) delete mode 100644 sysdeps/sparc/sparc32/pthread_barrier_wait.c delete mode 100644 sysdeps/sparc/sparc32/sem_post.c delete mode 100644 sysdeps/sparc/sparc32/sem_waitcommon.c delete mode 100644 sysdeps/sparc/sparc32/sparcv9/pthread_barrier_wait.c delete mode 100644 sysdeps/sparc/sparc32/sparcv9/sem_post.c delete mode 100644 sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/atomic-machine.h create mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/atomic-machine.h diff --git a/sysdeps/sparc/sparc32/atomic-machine.h b/sysdeps/sparc/sparc32/atomic-machine.h index d6e68f9..ceac729 100644 --- a/sysdeps/sparc/sparc32/atomic-machine.h +++ b/sysdeps/sparc/sparc32/atomic-machine.h @@ -50,311 +50,36 @@ typedef uintmax_t uatomic_max_t; #define __HAVE_64B_ATOMICS 0 #define USE_ATOMIC_COMPILER_BUILTINS 0 +#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) -/* 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 - macros from two different libraries. */ +#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) -__make_section_unallocated - (".gnu.linkonce.b.__sparc32_atomic_locks, \"aw\", %nobits"); +# define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + __sparc_assisted_compare_and_exchange_val_32_acq ((mem), (newval), (oldval)) -volatile unsigned char __sparc32_atomic_locks[64] - __attribute__ ((nocommon, section (".gnu.linkonce.b.__sparc32_atomic_locks" - __sec_comment), - visibility ("hidden"))); +#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) -#define __sparc32_atomic_do_lock(addr) \ - do \ - { \ - unsigned int __old_lock; \ - 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"); \ - while (__old_lock); \ - } \ - while (0) +#define atomic_compare_and_exchange_val_24_acq(mem, newval, oldval) \ + atomic_compare_and_exchange_val_acq (mem, newval, oldval) -#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); \ - } \ - while (0) - -#define __sparc32_atomic_do_unlock24(addr) \ - do \ - { \ - __asm __volatile ("" ::: "memory"); \ - *(char *) (addr) = 0; \ - } \ - while (0) - - -#ifndef SHARED -# define __v9_compare_and_exchange_val_32_acq(mem, newval, oldval) \ -({union { __typeof (oldval) a; uint32_t v; } oldval_arg = { .a = (oldval) }; \ - union { __typeof (newval) a; uint32_t v; } newval_arg = { .a = (newval) }; \ - register uint32_t __acev_tmp __asm ("%g6"); \ - register __typeof (mem) __acev_mem __asm ("%g1") = (mem); \ - register uint32_t __acev_oldval __asm ("%g5"); \ - __acev_tmp = newval_arg.v; \ - __acev_oldval = oldval_arg.v; \ - /* .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"); \ - (__typeof (oldval)) __acev_tmp; }) -#endif - -/* The only basic operation needed is compare and exchange. */ -#define __v7_compare_and_exchange_val_acq(mem, newval, oldval) \ - ({ __typeof (mem) __acev_memp = (mem); \ - __typeof (*mem) __acev_ret; \ - __typeof (*mem) __acev_newval = (newval); \ - \ - __sparc32_atomic_do_lock (__acev_memp); \ - __acev_ret = *__acev_memp; \ - if (__acev_ret == (oldval)) \ - *__acev_memp = __acev_newval; \ - __sparc32_atomic_do_unlock (__acev_memp); \ - __acev_ret; }) - -#define __v7_compare_and_exchange_bool_acq(mem, newval, oldval) \ - ({ __typeof (mem) __aceb_memp = (mem); \ - int __aceb_ret; \ - __typeof (*mem) __aceb_newval = (newval); \ - \ - __sparc32_atomic_do_lock (__aceb_memp); \ - __aceb_ret = 0; \ - if (*__aceb_memp == (oldval)) \ - *__aceb_memp = __aceb_newval; \ - else \ - __aceb_ret = 1; \ - __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); }) +#define atomic_exchange_24_rel(mem, newval) \ + atomic_exchange_rel (mem, newval) # define atomic_full_barrier() __asm ("" ::: "memory") # define atomic_read_barrier() atomic_full_barrier () # define atomic_write_barrier() atomic_full_barrier () -#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. */ - -extern uint64_t _dl_hwcap __attribute__((weak)); -# define __atomic_is_v9 \ - (__builtin_expect (&_dl_hwcap != 0, 1) \ - && __builtin_expect (_dl_hwcap & HWCAP_SPARC_V9, 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; }) - -#define atomic_full_barrier() \ - do { \ - if (__atomic_is_v9) \ - /* membar #LoadLoad | #LoadStore | #StoreLoad | #StoreStore */ \ - __asm __volatile (".word 0x8143e00f" : : : "memory"); \ - else \ - __asm __volatile ("" : : : "memory"); \ - } while (0) - -#define atomic_read_barrier() \ - do { \ - if (__atomic_is_v9) \ - /* membar #LoadLoad | #LoadStore */ \ - __asm __volatile (".word 0x8143e005" : : : "memory"); \ - else \ - __asm __volatile ("" : : : "memory"); \ - } while (0) - -#define atomic_write_barrier() \ - do { \ - if (__atomic_is_v9) \ - /* membar #LoadStore | #StoreStore */ \ - __asm __volatile (".word 0x8143e00c" : : : "memory"); \ - else \ - __asm __volatile ("" : : : "memory"); \ - } while (0) +void __sparc_link_error (void); +/* An OS-specific atomic-machine.h file will define this macro if + the OS can provide something. If not, we'll fail to build + with a compiler that doesn't supply the operation. */ +#ifndef __sparc_assisted_compare_and_exchange_val_32_acq +# define __sparc_assisted_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + ({ __sparc_link_error (); oldval; }) #endif -#include - #endif /* atomic-machine.h */ diff --git a/sysdeps/sparc/sparc32/pthread_barrier_wait.c b/sysdeps/sparc/sparc32/pthread_barrier_wait.c deleted file mode 100644 index e5ef911..0000000 --- a/sysdeps/sparc/sparc32/pthread_barrier_wait.c +++ /dev/null @@ -1 +0,0 @@ -#error No support for pthread barriers on pre-v9 sparc. diff --git a/sysdeps/sparc/sparc32/sem_post.c b/sysdeps/sparc/sparc32/sem_post.c deleted file mode 100644 index 415a3d5..0000000 --- a/sysdeps/sparc/sparc32/sem_post.c +++ /dev/null @@ -1,82 +0,0 @@ -/* sem_post -- post to a POSIX semaphore. Generic futex-using version. - Copyright (C) 2003-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jakub Jelinek , 2003. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#include -#include -#include -#include -#include -#include -#include - -#include - - -/* See sem_wait for an explanation of the algorithm. */ -int -__new_sem_post (sem_t *sem) -{ - struct new_sem *isem = (struct new_sem *) sem; - int private = isem->private; - unsigned int v; - - __sparc32_atomic_do_lock24 (&isem->pad); - - v = isem->value; - if ((v >> SEM_VALUE_SHIFT) == SEM_VALUE_MAX) - { - __sparc32_atomic_do_unlock24 (&isem->pad); - - __set_errno (EOVERFLOW); - return -1; - } - isem->value = v + (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24 (&isem->pad); - - if ((v & SEM_NWAITERS_MASK) != 0) - futex_wake (&isem->value, 1, private); - - return 0; -} -versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); - - -#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) -int -attribute_compat_text_section -__old_sem_post (sem_t *sem) -{ - int *futex = (int *) sem; - - /* We must need to synchronize with consumers of this token, so the atomic - increment must have release MO semantics. */ - atomic_write_barrier (); - (void) atomic_increment_val (futex); - /* We always have to assume it is a shared semaphore. */ - int err = lll_futex_wake (futex, 1, LLL_SHARED); - if (__builtin_expect (err, 0) < 0) - { - __set_errno (-err); - return -1; - } - return 0; -} -compat_symbol (libpthread, __old_sem_post, sem_post, GLIBC_2_0); -#endif diff --git a/sysdeps/sparc/sparc32/sem_waitcommon.c b/sysdeps/sparc/sparc32/sem_waitcommon.c deleted file mode 100644 index 5340f57..0000000 --- a/sysdeps/sparc/sparc32/sem_waitcommon.c +++ /dev/null @@ -1,146 +0,0 @@ -/* sem_waitcommon -- wait on a semaphore, shared code. - Copyright (C) 2003-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Paul Mackerras , 2003. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#include -#include -#include -#include -#include -#include - -#include -#include -#include - - -static void -__sem_wait_32_finish (struct new_sem *sem); - -static void -__sem_wait_cleanup (void *arg) -{ - struct new_sem *sem = (struct new_sem *) arg; - - __sem_wait_32_finish (sem); -} - -/* Wait until at least one token is available, possibly with a timeout. - This is in a separate function in order to make sure gcc - puts the call site into an exception region, and thus the - cleanups get properly run. TODO still necessary? Other futex_wait - users don't seem to need it. */ -static int -__attribute__ ((noinline)) -do_futex_wait (struct new_sem *sem, const struct timespec *abstime) -{ - int err; - - err = futex_abstimed_wait_cancelable (&sem->value, SEM_NWAITERS_MASK, - abstime, sem->private); - - return err; -} - -/* Fast path: Try to grab a token without blocking. */ -static int -__new_sem_wait_fast (struct new_sem *sem, int definitive_result) -{ - unsigned int v; - int ret = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - v = sem->value; - if ((v >> SEM_VALUE_SHIFT) == 0) - ret = -1; - else - sem->value = v - (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24(&sem->pad); - - return ret; -} - -/* Slow path that blocks. */ -static int -__attribute__ ((noinline)) -__new_sem_wait_slow (struct new_sem *sem, const struct timespec *abstime) -{ - unsigned int v; - int err = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - sem->nwaiters++; - - pthread_cleanup_push (__sem_wait_cleanup, sem); - - /* Wait for a token to be available. Retry until we can grab one. */ - v = sem->value; - do - { - if (!(v & SEM_NWAITERS_MASK)) - sem->value = v | SEM_NWAITERS_MASK; - - /* If there is no token, wait. */ - if ((v >> SEM_VALUE_SHIFT) == 0) - { - __sparc32_atomic_do_unlock24(&sem->pad); - - err = do_futex_wait(sem, abstime); - if (err == ETIMEDOUT || err == EINTR) - { - __set_errno (err); - err = -1; - goto error; - } - err = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - /* We blocked, so there might be a token now. */ - v = sem->value; - } - } - /* If there is no token, we must not try to grab one. */ - while ((v >> SEM_VALUE_SHIFT) == 0); - - sem->value = v - (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24(&sem->pad); - -error: - pthread_cleanup_pop (0); - - __sem_wait_32_finish (sem); - - return err; -} - -/* Stop being a registered waiter (non-64b-atomics code only). */ -static void -__sem_wait_32_finish (struct new_sem *sem) -{ - __sparc32_atomic_do_lock24(&sem->pad); - - if (--sem->nwaiters == 0) - sem->value &= ~SEM_NWAITERS_MASK; - - __sparc32_atomic_do_unlock24(&sem->pad); -} diff --git a/sysdeps/sparc/sparc32/sparcv9/pthread_barrier_wait.c b/sysdeps/sparc/sparc32/sparcv9/pthread_barrier_wait.c deleted file mode 100644 index 246c8d4..0000000 --- a/sysdeps/sparc/sparc32/sparcv9/pthread_barrier_wait.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/sparc/sparc32/sparcv9/sem_post.c b/sysdeps/sparc/sparc32/sparcv9/sem_post.c deleted file mode 100644 index 6a2813c..0000000 --- a/sysdeps/sparc/sparc32/sparcv9/sem_post.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c b/sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c deleted file mode 100644 index d4a1395..0000000 --- a/sysdeps/sparc/sparc32/sparcv9/sem_waitcommon.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/atomic-machine.h b/sysdeps/unix/sysv/linux/sparc/sparc32/atomic-machine.h new file mode 100644 index 0000000..4bb8aa4 --- /dev/null +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/atomic-machine.h @@ -0,0 +1,35 @@ +/* Atomic operations. SPARC/Linux version. + Copyright (C) 2016 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#include + +#define __sparc_assisted_compare_and_exchange_val_32_acq(mem, newval, oldval)\ +({union { __typeof (oldval) a; uint32_t v; } oldval_arg = { .a = (oldval) }; \ + union { __typeof (newval) a; uint32_t v; } newval_arg = { .a = (newval) }; \ + register uint32_t __acev_tmp __asm ("%o2"); \ + register __typeof (mem) __acev_mem __asm ("%o0") = (mem); \ + register uint32_t __acev_oldval __asm ("%o1"); \ + __acev_tmp = newval_arg.v; \ + __acev_oldval = oldval_arg.v; \ + __asm __volatile ("ta 0x23" \ + : "+r" (__acev_tmp), "=m" (*__acev_mem) \ + : "r" (__acev_oldval), "m" (*__acev_mem), \ + "r" (__acev_mem) : "memory"); \ + (__typeof (oldval)) __acev_tmp; }) + +#include diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/atomic-machine.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/atomic-machine.h new file mode 100644 index 0000000..c5cf630 --- /dev/null +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/atomic-machine.h @@ -0,0 +1 @@ +#include -- 2.1.2.532.g19b5d50