diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S b/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S new file mode 100644 index 0000000000..a00064153f --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_signal.S @@ -0,0 +1,133 @@ +/* Copyright (C) 2003 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 <shlib-compat.h> +#include <lowlevelcond.h> +#include "lowlevel-atomic.h" + +#define SYS_futex 240 +#define FUTEX_WAIT 0 +#define FUTEX_WAKE 1 + + + .text + + /* int pthread_cond_signal (pthread_cond_t *cond) */ + .globl __pthread_cond_signal + .type __pthread_cond_signal, @function + .align 5 +__pthread_cond_signal: + mov.l r8, @-r15 + sts.l pr, @-r15 + mov r4, r8 + + /* Get internal lock. */ + mov #1, r3 +#if cond_lock != 0 + XADD (r3, @(cond_lock,r8), r2) +#else + XADD (r3, @r8, r2) +#endif + tst r2, r2 + 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: + /* Bump the wakeup number. */ + mov #1, r2 + mov #0, r3 + clrt + mov.l @(wakeup_seq,r8),r0 + mov.l @(wakeup_seq+4,r8),r1 + addc r2, r0 + addc r3, r1 + mov.l r0,@(wakeup_seq,r8) + mov.l r1,@(wakeup_seq+4,r8) + + /* Wake up one thread. */ + mov r8, r4 + add #wakeup_seq, r4 + mov #FUTEX_WAKE, r5 + mov #1, r6 + mov #0, r7 + mov #SYS_futex, r3 + extu.b r3, r3 + trapa #0x14 + SYSCALL_INST_PAD + +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 + rts + mov.l @r15+, r8 + +1: + /* Initial locking failed. */ + mov r8, r5 +#if cond_lock != 0 + add #cond_lock, r5 +#endif + mov.l .Lmwait4, r1 + bsrf r1 + mov r2, r4 +.Lmwait4b: + bra 2b + nop + +5: + /* Unlock in loop requires wakeup. */ + mov r8, r4 +#if cond_lock != 0 + add #cond_lock, r4 +#endif + mov.l .Lmwake4, r1 + bsrf r1 + nop +.Lmwake4b: + bra 6b + nop + + .align 2 +.Lmwait4: + .long __lll_mutex_lock_wait-.Lmwait4b +.Lmwake4: + .long __lll_mutex_unlock_wake-.Lmwake4b + .size __pthread_cond_signal, .-__pthread_cond_signal +versioned_symbol (libpthread, __pthread_cond_signal, pthread_cond_signal, + GLIBC_2_3_2) + |