about summary refs log tree commit diff
path: root/linuxthreads/sysdeps/i386/pt-machine.h
diff options
context:
space:
mode:
Diffstat (limited to 'linuxthreads/sysdeps/i386/pt-machine.h')
-rw-r--r--linuxthreads/sysdeps/i386/pt-machine.h108
1 files changed, 0 insertions, 108 deletions
diff --git a/linuxthreads/sysdeps/i386/pt-machine.h b/linuxthreads/sysdeps/i386/pt-machine.h
deleted file mode 100644
index 0df096d152..0000000000
--- a/linuxthreads/sysdeps/i386/pt-machine.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/* Machine-dependent pthreads configuration and inline functions.
-   i386 version.
-   Copyright (C) 1996-2001, 2002, 2003 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Richard Henderson <rth@tamu.edu>.
-
-   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; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#ifndef _PT_MACHINE_H
-#define _PT_MACHINE_H	1
-
-#ifndef __ASSEMBLER__
-#ifndef PT_EI
-# define PT_EI extern inline __attribute__ ((always_inline))
-#endif
-
-extern long int testandset (int *spinlock);
-extern int __compare_and_swap (long int *p, long int oldval, long int newval);
-
-/* Get some notion of the current stack.  Need not be exactly the top
-   of the stack, just something somewhere in the current frame.  */
-#define CURRENT_STACK_FRAME  __builtin_frame_address (0)
-
-
-/* Spinlock implementation; required.  */
-PT_EI long int
-testandset (int *spinlock)
-{
-  long int ret;
-
-  __asm__ __volatile__(
-       "xchgl %0, %1"
-       : "=r"(ret), "=m"(*spinlock)
-       : "0"(1), "m"(*spinlock)
-       : "memory");
-
-  return ret;
-}
-
-
-/* Compare-and-swap for semaphores.
-   Available on the 486 and above, but not on the 386.
-   We test dynamically whether it's available or not. */
-
-#define HAS_COMPARE_AND_SWAP
-#define TEST_FOR_COMPARE_AND_SWAP
-
-PT_EI int
-__compare_and_swap (long int *p, long int oldval, long int newval)
-{
-  char ret;
-  long int readval;
-
-  __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0"
-			: "=q" (ret), "=m" (*p), "=a" (readval)
-			: "r" (newval), "m" (*p), "a" (oldval)
-			: "memory");
-  return ret;
-}
-
-
-PT_EI int
-get_eflags (void)
-{
-  int res;
-  __asm__ __volatile__ ("pushfl; popl %0" : "=r" (res) : );
-  return res;
-}
-
-
-PT_EI void
-set_eflags (int newflags)
-{
-  __asm__ __volatile__ ("pushl %0; popfl" : : "r" (newflags) : "cc");
-}
-
-
-PT_EI int
-compare_and_swap_is_available (void)
-{
-  int oldflags = get_eflags ();
-  int changed;
-  /* Flip AC bit in EFLAGS.  */
-  set_eflags (oldflags ^ 0x40000);
-  /* See if bit changed.  */
-  changed = (get_eflags () ^ oldflags) & 0x40000;
-  /* Restore EFLAGS.  */
-  set_eflags (oldflags);
-  /* If the AC flag did not change, it's a 386 and it lacks cmpxchg.
-     Otherwise, it's a 486 or above and it has cmpxchg.  */
-  return changed != 0;
-}
-#endif /* __ASSEMBLER__ */
-
-#endif /* pt-machine.h */