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authorMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
committerMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
commitcccc549ced940c85039c8ce263c8bb571f244afd (patch)
treeef77a870db7211ad6f511867fc56ee1a1a8b4c18 /libpthread/linuxthreads/sysdeps/mips/pt-machine.h
parente73b1211737842732951f9b9049294ef732e1ef0 (diff)
initial import of latest linuxthreads
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/mips/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/mips/pt-machine.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/mips/pt-machine.h b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
new file mode 100644
index 000000000..96f7a7f8c
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
@@ -0,0 +1,92 @@
+/* Machine-dependent pthreads configuration and inline functions.
+
+ Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ralf Baechle <ralf@gnu.org>.
+ Based on the Alpha version 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
+
+#include <sgidefs.h>
+#include <sys/tas.h>
+
+#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);
+
+
+/* Spinlock implementation; required. */
+
+PT_EI long int
+testandset (int *spinlock)
+{
+ return _test_and_set (spinlock, 1);
+}
+
+
+/* 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 stack_pointer
+register char * stack_pointer __asm__ ("$29");
+
+
+/* Compare-and-swap for semaphores. */
+
+#define HAS_COMPARE_AND_SWAP
+PT_EI int
+__compare_and_swap (long int *p, long int oldval, long int newval)
+{
+ long int ret, temp;
+
+ __asm__ __volatile__
+ ("/* Inline compare & swap */\n"
+ "1:\n\t"
+ ".set push\n\t"
+#if _MIPS_SIM == _ABIO32
+ ".set mips2\n\t"
+#endif
+#if _MIPS_SIM == _ABI64
+ "lld %1,%5\n\t"
+#else
+ "ll %1,%5\n\t"
+#endif
+ "move %0,$0\n\t"
+ "bne %1,%3,2f\n\t"
+ "move %0,%4\n\t"
+#if _MIPS_SIM == _ABI64
+ "scd %0,%2\n\t"
+#else
+ "sc %0,%2\n\t"
+#endif
+ ".set pop\n\t"
+ "beqz %0,1b\n"
+ "2:\n\t"
+ "/* End compare & swap */"
+ : "=&r" (ret), "=&r" (temp), "=m" (*p)
+ : "r" (oldval), "r" (newval), "m" (*p)
+ : "memory");
+
+ return ret;
+}
+
+#endif /* pt-machine.h */