diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S index 54a47e111f..35eb09cd0c 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S @@ -31,127 +31,6 @@ .align 16 __pthread_rwlock_rdlock: cfi_startproc - movq $NRW_RC, %rax - LOCK - xaddq %rax, NRW_WORD(%rdi) - js .Lundo - -.Lagain1: - movq $(NRW_WL|NRW_WP), %rcx - movq $(NRW_WL|NRW_WW_MASK), %rdx - testq %rax, %rcx - setnz %cl - testq %rax, %rdx - setnz %dl - orb %cl, %dl - jnz .Lwait - - xorl %eax, %eax - ret - -.Lwait: movq $NRW_WL, %rcx - testq %rcx, %rax - jz 4f - - movl %fs:TID, %ecx - cmpl %ecx, WRITER(%rdi) - je .Ldeadlk - -4: xorq %r8, %r8 - movq $NRW_RC, %rdx - addq %rdx, %rax - movq $(NRW_WL|NRW_AR), %rcx - movq $(NRW_WP|NRW_WW_MASK), %rdx - testq %rax, %rcx - setz %cl - testq %rax, %rdx - setnz %dl - testb %dl, %cl - jz 1f - - movq $NRW_RW-NRW_RC, %rdx - addq %rax, %rdx - LOCK - cmpxchgq %rdx, NRW_WORD(%rdi) - jnz .Lagain1 - - movq $NRW_RC_MASK, %rax - testq %rdx, %rax - movl $1, %r8d - jz .Lwake_waiter - -1: xorq %r10, %r10 - movl $NRW_R_WAKEUP, %r9d - movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi - xorl PSHARED(%rdi), %esi - leaq NRW_WORD+4(%rdi), %rdi -2: shldq $32, %rax, %rdx - movl $__NR_futex, %eax - syscall - movq -4(%rdi), %rax - -5: movq $(NRW_WL|NRW_WP), %rcx - movq $(NRW_WL|NRW_WW_MASK), %rdx - testq %rax, %rcx - setnz %cl - testq %rax, %rdx - setnz %dl - orb %cl, %dl - jnz 2b - - testl %r8d, %r8d - jz 3f - - movq $NRW_RC-NRW_RW, %rcx - addq %rcx, %rdx - LOCK - cmpxchgq %rdx, -4(%rdi) - jnz 5b - -3: xorl %eax, %eax - ret - -.Lwake_waiter: - movq %rdx, %r10 - movl $__NR_futex, %eax - movl $(FUTEX_WAKE_BITSET|FUTEX_PRIVATE_FLAG), %esi - xorl PSHARED(%rdi), %esi - leaq NRW_WORD(%rdi), %rdi - movl $1, %edx - movl $NRW_W_WAKEUP, %r9d - syscall - leaq -NRW_WORD(%rdi), %rdi - movq %r10, %rdx - jmp 1b - -.Lundo: movq $-NRW_RC, %rcx - movq %rax, %rdx - subq %rcx, %rax - LOCK - cmpxchgq %rdx, NRW_WORD(%rdi) - jz .Lret - - movq $NRW_RC_OVFL, %r8 -.Lagain2: - testq %r8, %rax - jz .Lagain1 - leaq (%rax,%rcx), %rdx - LOCK - cmpxchgq %rdx, NRW_WORD(%rdi) - jnz .Lagain2 - -.Lret: movl $EAGAIN, %eax - ret - -.Ldeadlk: - movq $NRW_RC, %rdx - LOCK - subq %rdx, NRW_WORD(%rdi) - - movl $EDEADLK, %eax - ret - -#if 0 xorq %r10, %r10 /* Get the lock. */ @@ -289,7 +168,6 @@ __pthread_rwlock_rdlock: subq $MUTEX, %rdi #endif jmp 13b -#endif cfi_endproc .size __pthread_rwlock_rdlock,.-__pthread_rwlock_rdlock |