1 files changed, 108 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h b/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h
new file mode 100644
index 000000000..e59c6906c
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/alpha/pt-machine.h
@@ -0,0 +1,108 @@
+/* Machine-dependent pthreads configuration and inline functions.
+   Alpha version.
+   Copyright (C) 1996, 1997, 1998 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 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 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.
+
+   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.,  59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+#include <asm/pal.h>
+
+
+/* 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__("$30");
+
+
+/* Spinlock implementation; required.  */
+PT_EI long int
+testandset (int *spinlock)
+{
+  long int ret, temp;
+
+  __asm__ __volatile__(
+	"/* Inline spinlock test & set */\n"
+	"1:\t"
+	"ldl_l %0,%3\n\t"
+	"bne %0,2f\n\t"
+	"or $31,1,%1\n\t"
+	"stl_c %1,%2\n\t"
+	"beq %1,1b\n"
+	"2:\tmb\n"
+	"/* End spinlock test & set */"
+	: "=&r"(ret), "=&r"(temp), "=m"(*spinlock)
+	: "m"(*spinlock)
+        : "memory");
+
+  return ret;
+}
+
+/* Spinlock release; default is just set to zero.  */
+#define RELEASE(spinlock) \
+  __asm__ __volatile__("mb" : : : "memory"); \
+  *spinlock = 0
+
+
+/* Begin allocating thread stacks at this address.  Default is to allocate
+   them just below the initial program stack.  */
+#define THREAD_STACK_START_ADDRESS  0x40000000000
+
+
+/* Return the thread descriptor for the current thread.  */
+#define THREAD_SELF \
+({									      \
+  register pthread_descr __self __asm__("$0");				      \
+  __asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq) : "$0");	      \
+  __self;								      \
+})
+
+/* Initialize the thread-unique value.  */
+#define INIT_THREAD_SELF(descr, nr) \
+{									      \
+  register pthread_descr __self __asm__("$16") = (descr);		      \
+  __asm__ __volatile__ ("call_pal %1" : : "r"(__self), "i"(PAL_wruniq));      \
+}
+
+
+/* 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;
+
+  __asm__ __volatile__ (
+	"/* Inline compare & swap */\n"
+	"1:\t"
+	"ldq_l %0,%4\n\t"
+	"cmpeq %0,%2,%0\n\t"
+	"beq %0,2f\n\t"
+	"mov %3,%0\n\t"
+	"stq_c %0,%1\n\t"
+	"beq %0,1b\n\t"
+	"2:\tmb\n"
+	"/* End compare & swap */"
+	: "=&r"(ret), "=m"(*p)
+	: "r"(oldval), "r"(newval), "m"(*p));
+
+  return ret;
+}