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authorDmitry Chestnykh <dm.chestnykh@gmail.com>2024-04-19 12:45:13 +0300
committerWaldemar Brodkorb <wbx@openadk.org>2024-04-20 06:39:11 +0200
commitce2eec56c3845ce70259e2af936d1e816c3763da (patch)
treefd6ce9fe60b5e6b5465c209172d4c28be0481b6d /libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
parent225478e84d4115205bfee73d1cf5688fdde499c8 (diff)
Switch x86 NPTL impl to generic C code.
The asm code has high maintainance cost. The cost is extremely high if we take into consideration time64 implementation which implies operating with 64bit numbers on 32bit system. Also glibc uses mainly C in NPTL code. Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S215
1 files changed, 0 insertions, 215 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
deleted file mode 100644
index d831a6bf5..000000000
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
+++ /dev/null
@@ -1,215 +0,0 @@
-/* Copyright (C) 2002,2003,2004,2005,2007,2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
- 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
- <http://www.gnu.org/licenses/>. */
-
-#include <sysdep.h>
-#include <lowlevellock.h>
-#include <lowlevelcond.h>
-#include <bits/kernel-features.h>
-#include <pthread-pi-defines.h>
-#include <pthread-errnos.h>
-#include <tls.h>
-
-
- .text
-
- /* int pthread_cond_signal (pthread_cond_t *cond) */
- .globl __pthread_cond_signal
- .type __pthread_cond_signal, @function
- .protected __pthread_cond_signal
- .align 16
-__pthread_cond_signal:
-
- cfi_startproc
- pushl %ebx
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%ebx, 0)
- pushl %edi
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%edi, 0)
- cfi_remember_state
-
- movl 12(%esp), %edi
-
- /* Get internal lock. */
- movl $1, %edx
- xorl %eax, %eax
- LOCK
-#if cond_lock == 0
- cmpxchgl %edx, (%edi)
-#else
- cmpxchgl %edx, cond_lock(%edi)
-#endif
- jnz 1f
-
-2: leal cond_futex(%edi), %ebx
- movl total_seq+4(%edi), %eax
- movl total_seq(%edi), %ecx
- cmpl wakeup_seq+4(%edi), %eax
-#if cond_lock != 0
- /* Must use leal to preserve the flags. */
- leal cond_lock(%edi), %edi
-#endif
- ja 3f
- jb 4f
- cmpl wakeup_seq-cond_futex(%ebx), %ecx
- jbe 4f
-
- /* Bump the wakeup number. */
-3: addl $1, wakeup_seq-cond_futex(%ebx)
- adcl $0, wakeup_seq-cond_futex+4(%ebx)
- addl $1, (%ebx)
-
- /* Wake up one thread. */
- pushl %esi
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%esi, 0)
- pushl %ebp
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%ebp, 0)
-
-#if FUTEX_PRIVATE_FLAG > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex-cond_futex(%ebx)
- sete %cl
- je 8f
-
- movl dep_mutex-cond_futex(%ebx), %edx
- /* Requeue to a non-robust PI mutex if the PI bit is set and
- the robust bit is not set. */
- movl MUTEX_KIND(%edx), %eax
- andl $(ROBUST_BIT|PI_BIT), %eax
- cmpl $PI_BIT, %eax
- je 9f
-
-8: subl $1, %ecx
-#ifdef __ASSUME_PRIVATE_FUTEX
- andl $FUTEX_PRIVATE_FLAG, %ecx
-#else
- andl %gs:PRIVATE_FUTEX, %ecx
-#endif
- addl $FUTEX_WAKE_OP, %ecx
- movl $SYS_futex, %eax
- movl $1, %edx
- movl $1, %esi
- movl $FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, %ebp
- /* FIXME: Until Ingo fixes 4G/4G vDSO, 6 arg syscalls are broken for
- sysenter.
- ENTER_KERNEL */
- int $0x80
- popl %ebp
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%ebp)
- popl %esi
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%esi)
-
- /* For any kind of error, we try again with WAKE.
- The general test also covers running on old kernels. */
- cmpl $-4095, %eax
- jae 7f
-
-6: xorl %eax, %eax
- popl %edi
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%edi)
- popl %ebx
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%ebx)
- ret
-
- cfi_restore_state
-
-9: movl $(FUTEX_CMP_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %ecx
- movl $SYS_futex, %eax
- movl $1, %edx
- xorl %esi, %esi
- movl dep_mutex-cond_futex(%ebx), %edi
- movl (%ebx), %ebp
- /* FIXME: Until Ingo fixes 4G/4G vDSO, 6 arg syscalls are broken for
- sysenter.
- ENTER_KERNEL */
- int $0x80
- popl %ebp
- popl %esi
-
- leal -cond_futex(%ebx), %edi
-
- /* For any kind of error, we try again with WAKE.
- The general test also covers running on old kernels. */
- cmpl $-4095, %eax
- jb 4f
-
-7:
-#ifdef __ASSUME_PRIVATE_FUTEX
- andl $FUTEX_PRIVATE_FLAG, %ecx
-#else
- andl %gs:PRIVATE_FUTEX, %ecx
-#endif
- orl $FUTEX_WAKE, %ecx
-
- xorl $(FUTEX_WAKE ^ FUTEX_WAKE_OP), %ecx
- movl $SYS_futex, %eax
- /* %edx should be 1 already from $FUTEX_WAKE_OP syscall.
- movl $1, %edx */
- ENTER_KERNEL
-
- /* Unlock. Note that at this point %edi always points to
- cond_lock. */
-4: LOCK
- subl $1, (%edi)
- je 6b
-
- /* Unlock in loop requires wakeup. */
-5: movl %edi, %eax
-#if (LLL_SHARED-LLL_PRIVATE) > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex-cond_futex(%ebx)
- setne %cl
- subl $1, %ecx
- andl $(LLL_SHARED-LLL_PRIVATE), %ecx
-#if LLL_PRIVATE != 0
- addl $LLL_PRIVATE, %ecx
-#endif
- call __lll_unlock_wake
- jmp 6b
-
- /* Initial locking failed. */
-1:
-#if cond_lock == 0
- movl %edi, %edx
-#else
- leal cond_lock(%edi), %edx
-#endif
-#if (LLL_SHARED-LLL_PRIVATE) > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex(%edi)
- setne %cl
- subl $1, %ecx
- andl $(LLL_SHARED-LLL_PRIVATE), %ecx
-#if LLL_PRIVATE != 0
- addl $LLL_PRIVATE, %ecx
-#endif
- call __lll_lock_wait
- jmp 2b
-
- cfi_endproc
- .size __pthread_cond_signal, .-__pthread_cond_signal
-weak_alias(__pthread_cond_signal, pthread_cond_signal)