From 8de135ff7684ad93f83f4a06975343efcdac8f49 Mon Sep 17 00:00:00 2001
From: ivmai <ivmai>
Date: Mon, 5 Oct 2009 16:43:01 +0000
Subject: [PATCH] 2009-10-05  Ivan Maidanski <ivmai@mail.ru> (really Takashi
 YOSHII)

	* src/atomic_ops/sysdeps/gcc/sh.h: New file.
	* src/atomic_ops.h: Include gcc/sh.h if __arm__.
	* src/atomic_ops/sysdeps/Makefile.am: Add gcc/sh.h entry.
---
 ChangeLog                          | 12 +++++++---
 src/atomic_ops.h                   |  4 ++++
 src/atomic_ops/sysdeps/Makefile.am |  2 +-
 src/atomic_ops/sysdeps/gcc/sh.h    | 37 ++++++++++++++++++++++++++++++
 4 files changed, 51 insertions(+), 4 deletions(-)
 create mode 100644 src/atomic_ops/sysdeps/gcc/sh.h

diff --git a/ChangeLog b/ChangeLog
index cbf2158..8de5720 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,8 +1,14 @@
+2009-10-05  Ivan Maidanski <ivmai@mail.ru> (really Takashi YOSHII)
+
+	* src/atomic_ops/sysdeps/gcc/sh.h: New file.
+	* src/atomic_ops.h: Include gcc/sh.h if __arm__.
+	* src/atomic_ops/sysdeps/Makefile.am: Add gcc/sh.h entry.
+
 2009-10-02  Ivan Maidanski <ivmai@mail.ru>
 
-	* Makefile.am: Add armcc/arm_v6.h, msftc/arm.h,
-	msftc/common32_defs.h, sunc/x86.h sunc/x86_64.h entries; order all
-	entries alphabetically.
+	* src/atomic_ops/sysdeps/Makefile.am: Add armcc/arm_v6.h,
+	msftc/arm.h, msftc/common32_defs.h, sunc/x86.h sunc/x86_64.h
+	entries; order all entries alphabetically.
 	* Makefile.in: Regenerate.
 
 2009-10-01  Ivan Maidanski <ivmai@mail.ru>
diff --git a/src/atomic_ops.h b/src/atomic_ops.h
index 5edcf1a..1424711 100644
--- a/src/atomic_ops.h
+++ b/src/atomic_ops.h
@@ -241,6 +241,10 @@
 # if defined(__mips__)
 #   include "atomic_ops/sysdeps/gcc/mips.h"
 # endif /* __mips__ */
+# if defined(__sh__) || defined(SH4)
+#   include "atomic_ops/sysdeps/gcc/sh.h"
+#   define AO_CAN_EMUL_CAS
+# endif /* __sh__ */
 #endif /* __GNUC__ && !AO_USE_PTHREAD_DEFS */
 
 #if defined(__INTEL_COMPILER) && !defined(AO_USE_PTHREAD_DEFS)
diff --git a/src/atomic_ops/sysdeps/Makefile.am b/src/atomic_ops/sysdeps/Makefile.am
index b06d712..d0274f0 100644
--- a/src/atomic_ops/sysdeps/Makefile.am
+++ b/src/atomic_ops/sysdeps/Makefile.am
@@ -29,7 +29,7 @@ nobase_sysdep_HEADERS= generic_pthread.h \
 	  gcc/alpha.h gcc/arm.h gcc/cris.h \
 	  gcc/hppa.h gcc/ia64.h gcc/m68k.h \
 	  gcc/mips.h gcc/powerpc.h gcc/s390.h \
-	  gcc/sparc.h gcc/x86.h gcc/x86_64.h \
+	  gcc/sh.h gcc/sparc.h gcc/x86.h gcc/x86_64.h \
 	\
 	  hpc/hppa.h hpc/ia64.h \
 	\
diff --git a/src/atomic_ops/sysdeps/gcc/sh.h b/src/atomic_ops/sysdeps/gcc/sh.h
new file mode 100644
index 0000000..95a89c7
--- /dev/null
+++ b/src/atomic_ops/sysdeps/gcc/sh.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2009 by Takashi YOSHII. All rights reserved.
+ *
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+#include "../all_atomic_load_store.h"
+#include "../ordered.h"
+
+/* sh has tas.b(byte) only */
+#include "../test_and_set_t_is_char.h"
+
+/* FIXME: Is AO_TS_SET redefining needed? */
+/* #undef AO_TS_SET */
+/* #define AO_TS_SET (1<<7) */
+
+AO_INLINE AO_TS_VAL_t
+AO_test_and_set_full(volatile AO_TS_t *addr)
+{
+  int oldval;
+
+  __asm__ __volatile__(
+       "tas.b @%1; movt %0"
+       : "=r" (oldval)
+       : "r" (addr)
+       : "t", "memory");
+   return oldval? AO_TS_CLEAR : AO_TS_SET;
+}
+#define AO_HAVE_test_and_set_full
-- 
2.40.0