diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S new file mode 100644 index 000000000..1242fc2cc --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S @@ -0,0 +1,262 @@ +/* Copyright (C) 2003, 2004, 2006, 2007 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <lowlevellock.h> +#include <lowlevelcond.h> +#include <bits/kernel-features.h> +#include <pthread-pi-defines.h> +#include <pthread-errnos.h> +#include <tcb-offsets.h> +#include "lowlevel-atomic.h" + + .text + + /* int pthread_cond_broadcast (pthread_cond_t *cond) */ + .globl __pthread_cond_broadcast + .type __pthread_cond_broadcast, @function + .align 5 +__pthread_cond_broadcast: + mov.l r10, @-r15 + mov.l r9, @-r15 + mov.l r8, @-r15 + sts.l pr, @-r15 + mov r4, r8 + + /* Get internal lock. */ + mov #0, r3 + mov #1, r4 +#if cond_lock != 0 + CMPXCHG (r3, @(cond_lock,r8), r4, r2) +#else + CMPXCHG (r3, @r8, r4, r2) +#endif + bf 1f +2: + mov.l @(total_seq+4,r8),r0 + mov.l @(total_seq,r8),r1 + mov.l @(wakeup_seq+4,r8), r2 + cmp/hi r2, r0 + bt 3f + cmp/hi r0, r2 + bt 4f + mov.l @(wakeup_seq,r8), r2 + cmp/hi r2, r1 + bf 4f + +3: + /* Cause all currently waiting threads to recognize they are + woken up. */ + mov.l r1, @(wakeup_seq,r8) + mov.l r0, @(wakeup_seq+4,r8) + mov.l r1, @(woken_seq,r8) + mov.l r0, @(woken_seq+4,r8) + mov.l @(broadcast_seq,r8), r2 + add #1, r2 + mov.l r2, @(broadcast_seq,r8) + add r1, r1 + mov r1, r10 + mov.l r10, @(cond_futex,r8) + + /* Get the address of the mutex used. */ + mov.l @(dep_mutex,r8), r9 + + /* Unlock. */ +#if cond_lock != 0 + DEC (@(cond_lock,r8), r2) +#else + DEC (@r8, r2) +#endif + tst r2, r2 + bf 7f + +8: + /* Don't use requeue for pshared condvars. */ + mov #-1, r0 + cmp/eq r0, r9 + mov r8, r4 + bt/s 9f + add #cond_futex, r4 + + /* XXX: The kernel only supports FUTEX_CMP_REQUEUE to the same + type of futex (private resp. shared). */ + mov.l @(MUTEX_KIND,r9), r0 + tst #(PI_BIT|PS_BIT), r0 + bf 9f + + /* Wake up all threads. */ +#ifdef __ASSUME_PRIVATE_FUTEX + mov #(FUTEX_CMP_REQUEUE|FUTEX_PRIVATE_FLAG), r5 + extu.b r5, r5 +#else + stc gbr, r1 + mov.w .Lpfoff, r2 + add r2, r1 + mov.l @r1, r5 + mov #FUTEX_CMP_REQUEUE, r0 + or r0, r5 +#endif + mov #1, r6 + mov #-1, r7 + shlr r7 /* r7 = 0x7fffffff */ + mov r9, r0 +# if MUTEX_FUTEX != 0 + add #MUTEX_FUTEX, r0 +# endif + mov r10, r1 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x16 + SYSCALL_INST_PAD + + /* For any kind of error, which mainly is EAGAIN, we try again + with WAKE. The general test also covers running on old + kernels. */ + mov r0, r1 + mov #-12, r2 + shad r2, r1 + not r1, r1 + tst r1, r1 + mov r8, r4 + bt/s 9f + add #cond_futex, r4 + +10: + mov #0, r0 + lds.l @r15+, pr + mov.l @r15+, r8 + mov.l @r15+, r9 + rts + mov.l @r15+, r10 + +4: + /* Unlock. */ +#if cond_lock != 0 + DEC (@(cond_lock,r8), r2) +#else + DEC (@r8, r2) +#endif + tst r2, r2 + bf 5f +6: + mov #0, r0 + lds.l @r15+, pr + mov.l @r15+, r8 + mov.l @r15+, r9 + rts + mov.l @r15+, r10 + +1: + /* Initial locking failed. */ + mov r8, r5 +#if cond_lock != 0 + add #cond_lock, r5 +#endif + mov.l @(dep_mutex,r8), r0 + cmp/eq #-1, r0 + bf/s 99f + mov #LLL_PRIVATE, r6 + mov #LLL_SHARED, r6 +99: + extu.b r6, r6 + mov.l .Lwait5, r1 + bsrf r1 + mov r2, r4 +.Lwait5b: + bra 2b + nop + +5: + /* Unlock in loop requires wakeup. */ + mov r8, r4 +#if cond_lock != 0 + add #cond_lock, r4 +#endif + mov.l @(dep_mutex,r8), r0 + cmp/eq #-1, r0 + bf/s 99f + mov #LLL_PRIVATE, r5 + mov #LLL_SHARED, r5 +99: + mov.l .Lwake5, r1 + bsrf r1 + extu.b r5, r5 +.Lwake5b: + bra 6b + nop + +7: + /* Unlock in loop requires wakeup. */ + mov r8, r4 +#if cond_lock != 0 + add #cond_lock, r4 +#endif + mov #-1, r0 + cmp/eq r0, r9 + bf/s 99f + mov #LLL_PRIVATE, r5 + mov #LLL_SHARED, r5 +99: + mov.l .Lwake6, r1 + bsrf r1 + extu.b r5, r5 +.Lwake6b: + bra 8b + nop + +9: + mov #-1, r0 + cmp/eq r0, r9 + bt/s 99f + mov #FUTEX_WAKE, r5 +#ifdef __ASSUME_PRIVATE_FUTEX + mov #(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), r5 + extu.b r5, r5 +#else + stc gbr, r1 + mov.w .Lpfoff, r2 + add r2, r1 + mov.l @r1, r5 + mov #FUTEX_WAKE, r0 + or r0, r5 +#endif +99: + mov #-1, r6 + shlr r6 /* r6 = 0x7fffffff */ + mov #0, r7 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + bra 10b + nop + +#ifndef __ASSUME_PRIVATE_FUTEX +.Lpfoff: + .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE +#endif + + .align 2 +.Lwait5: + .long __lll_lock_wait-.Lwait5b +.Lwake5: + .long __lll_unlock_wake-.Lwake5b +.Lwake6: + .long __lll_unlock_wake-.Lwake6b + .size __pthread_cond_broadcast, .-__pthread_cond_broadcast +weak_alias (__pthread_cond_broadcast, pthread_cond_broadcast) |