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Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S62
1 files changed, 48 insertions, 14 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S
index ce1ab37c8..52fe5de10 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 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
@@ -17,14 +17,13 @@
02111-1307 USA. */
#include <sysdep.h>
+#include <lowlevellock.h>
#include <lowlevelrwlock.h>
#include <pthread-errnos.h>
#include <tcb-offsets.h>
+#include <bits/kernel-features.h>
#include "lowlevel-atomic.h"
-#define FUTEX_WAIT 0
-#define FUTEX_WAKE 1
-
.text
@@ -54,7 +53,8 @@ __pthread_rwlock_rdlock:
mov.l @(WRITERS_QUEUED,r8), r0
tst r0, r0
bt 5f
- mov.l @(FLAGS,r8), r0
+ mov #FLAGS, r0
+ mov.b @(r0,r8), r0
tst r0, r0
bt 5f
3:
@@ -74,9 +74,28 @@ __pthread_rwlock_rdlock:
tst r2, r2
bf 10f
11:
+#ifdef __ASSUME_PRIVATE_FUTEX
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r5
+ mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r0
+ xor r0, r5
+ extu.b r5, r5
+#else
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r5
+ extu.b r5, r5
+# if FUTEX_WAIT != 0
+ mov #FUTEX_WAIT, r0
+ or r0, r5
+# endif
+ stc gbr, r1
+ mov.w .Lpfoff, r2
+ add r2, r1
+ mov.l @r1, r0
+ xor r0, r5
+#endif
mov r8, r4
add #READERS_WAKEUP, r4
- mov #FUTEX_WAIT, r5
mov r9, r6
mov #0, r7
mov #SYS_futex, r3
@@ -123,15 +142,22 @@ __pthread_rwlock_rdlock:
rts
mov r3, r0
+#ifndef __ASSUME_PRIVATE_FUTEX
+.Lpfoff:
+ .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
+#endif
+
1:
mov r8, r5
#if MUTEX != 0
add #MUTEX, r5
#endif
- mov r2, r4
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r6
+ extu.b r6, r6
mov.l .Lwait0, r1
bsrf r1
- nop
+ mov r2, r4
.Lwait0b:
bra 2b
nop
@@ -154,6 +180,9 @@ __pthread_rwlock_rdlock:
#if MUTEX != 0
add #MUTEX, r4
#endif
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r5
+ extu.b r5, r5
mov.l .Lwake0, r1
bsrf r1
nop
@@ -182,6 +211,9 @@ __pthread_rwlock_rdlock:
#if MUTEX != 0
add #MUTEX, r4
#endif
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r5
+ extu.b r5, r5
mov.l .Lwake1, r1
bsrf r1
nop
@@ -194,23 +226,25 @@ __pthread_rwlock_rdlock:
#if MUTEX != 0
add #MUTEX, r5
#endif
- mov r2, r4
+ mov #PSHARED, r0
+ mov.b @(r0,r8), r6
+ extu.b r6, r6
mov.l .Lwait1, r1
bsrf r1
- nop
+ mov r2, r4
.Lwait1b:
bra 13b
nop
.align 2
.Lwait0:
- .long __lll_mutex_lock_wait-.Lwait0b
+ .long __lll_lock_wait-.Lwait0b
.Lwake0:
- .long __lll_mutex_unlock_wake-.Lwake0b
+ .long __lll_unlock_wake-.Lwake0b
.Lwait1:
- .long __lll_mutex_lock_wait-.Lwait1b
+ .long __lll_lock_wait-.Lwait1b
.Lwake1:
- .long __lll_mutex_unlock_wake-.Lwake1b
+ .long __lll_unlock_wake-.Lwake1b
.size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock
.globl pthread_rwlock_rdlock