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authorEric Andersen <andersen@codepoet.org>2004-07-15 07:34:00 +0000
committerEric Andersen <andersen@codepoet.org>2004-07-15 07:34:00 +0000
commit71150804d1ac8ed2f7b9c6d3025fd415c58b129e (patch)
treeaab8c892a813847614070f73e711178cd3c9ec74 /libc/sysdeps/linux/h8300/pt-machine.h
parent255fbb6abcef56c5f8c36383d49a902686f258f5 (diff)
h8300 updates from Yoshinori Sato
Diffstat (limited to 'libc/sysdeps/linux/h8300/pt-machine.h')
-rw-r--r--libc/sysdeps/linux/h8300/pt-machine.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/h8300/pt-machine.h b/libc/sysdeps/linux/h8300/pt-machine.h
new file mode 100644
index 000000000..ad83147cb
--- /dev/null
+++ b/libc/sysdeps/linux/h8300/pt-machine.h
@@ -0,0 +1,58 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ H8/300 version.
+ Copyright (C) 1996, 1998, 2000, 2002 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 PT_EI
+# define PT_EI extern inline
+#endif
+
+extern long int testandset (int *spinlock);
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ char ret;
+
+ __asm__ __volatile__(
+ "sub.w %0,%0\n\t"
+ "stc ccr,@-sp\n\t"
+ "orc #0x80,ccr\n\t"
+ "bld #0,@%2\n\t"
+ "bset #0,@%2\n\t"
+ "rotxl.w %0\n\t"
+ "ldc @sp+,ccr\n\t"
+ :"=r"(ret),"=m"(*spinlock)
+ :"g"(spinlock)
+ :"cc");
+
+ return ret;
+}
+
+
+/* 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__ ("%sp");
+
+#endif /* pt-machine.h */