Amend log entry with omitted file.

[glibc.git] / sysdeps / mach / mips / machine-lock.h

diff --git a/sysdeps/mach/mips/machine-lock.h b/sysdeps/mach/mips/machine-lock.h
index 628aae41bbaddbbfae8b841cd632a538aa1bf397..eccc720dfaf12eb993247ce84e9c047ae5434da4 100644 (file)
--- a/sysdeps/mach/mips/machine-lock.h
+++ b/sysdeps/mach/mips/machine-lock.h
@@ -1,25 +1,28 @@
 /* Machine-specific definition for spin locks.  MIPS version.
-Copyright (C) 1994 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+   Copyright (C) 1996, 1997 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   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
-Library General Public License for more details.
+   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 Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   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.  */
 
 #ifndef _MACHINE_LOCK_H
 #define        _MACHINE_LOCK_H
 
+/* To get the TAS pseudo-instruction. */
+#include <mach/mips/mips_instruction.h>
+
 /* The type of a spin lock variable.  */
 
 typedef __volatile int __spin_lock_t;
@@ -46,19 +49,35 @@ __spin_unlock (__spin_lock_t *__lock)
 _EXTERN_INLINE int
 __spin_try_lock (register __spin_lock_t *__lock)
 {
-  register int __rtn;
+#if (__mips >= 2)
+  int __rtn;
+
   __asm__ __volatile (".set noreorder");
-#if 0
-  __asm__ __volatile ("lw %0,0(%1)": "=r" (__rtn) : "r" (__lock));
-  __asm__ __volatile ("sw %0,0(%0)": : "r" (__lock));
-  __asm__ __volatile ("xor %0,%1,%0": "=r" (__rtn) : "r" (__lock));
+#if (__mips64)
+  __asm__ __volatile ("lld %0,0(%1)" : "=r" (__rtn) : "r" (__lock));
 #else
-  /* Use the Mach microkernel's emulated TAS pseudo-instruction.  */
-  register int __rtn __asm__ ("a0");
-  __asm__ __volatile (".word 0xf ! %0 " : "=r" (__rtn) : "0" (__lock));
+  __asm__ __volatile ("ll %0,0(%1)" : "=r" (__rtn) : "r" (__lock));
+#endif
+  if (__rtn)
+    return 0;
+  __asm__ __volatile ("move %0,%1" : "=r" (__rtn) : "r" (__lock));
+#if (__mips64)
+  __asm__ __volatile ("scd %0,0(%1)" : "=r" (__rtn) : "r" (__lock));
+#else
+  __asm__ __volatile ("sc %0,0(%1)" : "=r" (__rtn) : "r" (__lock));
 #endif
+  __asm__ __volatile (".set reorder");
+  return __rtn;
+#else
+  register int __rtn __asm__ ("a0");
+
+  /* Use the Mach microkernel's emulated TAS pseudo-instruction.  */
+  __asm__ __volatile (".set noreorder");
+  __asm__ __volatile (".word %1" : "=r" (__rtn) : "i" (op_tas), "0" (__lock));
+  __asm__ __volatile ("nop");
   __asm__ __volatile (".set reorder");
   return __rtn ^ (int) __lock;
+#endif
 }
 
 /* Return nonzero if LOCK is locked.  */