remove linuxthreads.new, rename linuxthreads.old

Linuxthreads.new isn't really useful with the existence
of NPTL/TLS for well supported architectures. There is no
reason to use LT.new for ARM/MIPS or other architectures
supporting NPTL/TLS. It is not available for noMMU architectures
like Blackfin or FR-V. To simplify the live of the few uClibc-ng
developers, LT.new is removed and LT.old is renamed to LT.
LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS

1 files changed, 98 insertions, 5 deletions

diff --git a/libpthread/linuxthreads/sysdeps/powerpc/pt-machine.h b/libpthread/linuxthreads/sysdeps/powerpc/pt-machine.h
index 55e922efd..aa2d206b0 100644
--- a/libpthread/linuxthreads/sysdeps/powerpc/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/powerpc/pt-machine.h
@@ -1,8 +1,101 @@
+/* Machine-dependent pthreads configuration and inline functions.
+   powerpc version.
+   Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002 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 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, see <http://www.gnu.org/licenses/>.  */
+
+/* These routines are from Appendix G of the 'PowerPC 601 RISC Microprocessor
+   User's Manual', by IBM and Motorola.  */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H   1
+
 #include <features.h>
-#include <bits/wordsize.h>
 
-#if __WORDSIZE == 32
-# include "powerpc32/pt-machine.h"
-#else
-# include "powerpc64/pt-machine.h"
+#ifndef PT_EI
+# define PT_EI __extern_always_inline
 #endif
+
+/* For multiprocessor systems, we want to ensure all memory accesses
+   are completed before we reset a lock.  On other systems, we still
+   need to make sure that the compiler has flushed everything to memory.  */
+#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
+
+/* 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__ ("r1");
+
+/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
+struct _pthread_descr_struct;
+register struct _pthread_descr_struct *__thread_self __asm__("r2");
+
+/* Return the thread descriptor for the current thread.  */
+#define THREAD_SELF  __thread_self
+
+/* Initialize the thread-unique value.  */
+#define INIT_THREAD_SELF(descr, nr)  (__thread_self = (descr))
+
+/* Compare-and-swap for semaphores. */
+/* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */
+
+#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
+#define IMPLEMENT_TAS_WITH_CAS
+
+PT_EI int
+__compare_and_swap (long int *p, long int oldval, long int newval)
+{
+  int ret;
+
+  __asm__ __volatile__ (
+	   "0:    lwarx %0,0,%1 ;"
+	   "      xor. %0,%3,%0;"
+	   "      bne 1f;"
+	   "      stwcx. %2,0,%1;"
+	   "      bne- 0b;"
+	   "1:    "
+	: "=&r"(ret)
+	: "r"(p), "r"(newval), "r"(oldval)
+	: "cr0", "memory");
+  /* This version of __compare_and_swap is to be used when acquiring
+     a lock, so we don't need to worry about whether other memory
+     operations have completed, but we do need to be sure that any loads
+     after this point really occur after we have acquired the lock.  */
+  __asm__ __volatile__ ("isync" : : : "memory");
+  return ret == 0;
+}
+
+PT_EI int
+__compare_and_swap_with_release_semantics (long int *p,
+					   long int oldval, long int newval)
+{
+  int ret;
+
+  MEMORY_BARRIER ();
+  __asm__ __volatile__ (
+	   "0:    lwarx %0,0,%1 ;"
+	   "      xor. %0,%3,%0;"
+	   "      bne 1f;"
+	   "      stwcx. %2,0,%1;"
+	   "      bne- 0b;"
+	   "1:    "
+	: "=&r"(ret)
+	: "r"(p), "r"(newval), "r"(oldval)
+	: "cr0", "memory");
+  return ret == 0;
+}
+
+#endif /* pt-machine.h */