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-rw-r--r--contrib/libstdc++/config/cpu/m68k/bits/atomicity.h158
-rw-r--r--contrib/libstdc++/config/cpu/m68k/bits/cpu_limits.h35
2 files changed, 193 insertions, 0 deletions
diff --git a/contrib/libstdc++/config/cpu/m68k/bits/atomicity.h b/contrib/libstdc++/config/cpu/m68k/bits/atomicity.h
new file mode 100644
index 0000000..c5d3394
--- /dev/null
+++ b/contrib/libstdc++/config/cpu/m68k/bits/atomicity.h
@@ -0,0 +1,158 @@
+// Low-level functions for atomic operations: m68k version -*- C++ -*-
+
+// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _BITS_ATOMICITY_H
+#define _BITS_ATOMICITY_H 1
+
+typedef int _Atomic_word;
+
+#if defined(__mc68020__) || defined(__mc68030__) \
+ || defined(__mc68040__) || defined(__mc68060__)
+// These variants support compare-and-swap.
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+ register _Atomic_word __result = *__mem;
+ register _Atomic_word __temp;
+ __asm__ __volatile__ ("1: move%.l %0,%1\n\t"
+ "add%.l %2,%1\n\t"
+ "cas%.l %0,%1,%3\n\t"
+ "jbne 1b"
+ : "=d" (__result), "=&d" (__temp)
+ : "d" (__val), "m" (*__mem), "0" (__result)
+ : "memory");
+ return __result;
+}
+
+#elif defined(__rtems__)
+ /*
+ * TAS/JBNE is unsafe on systems with strict priority-based scheduling.
+ * Disable interrupts, which we can do only from supervisor mode.
+ */
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+ _Atomic_word __result;
+ short __level, __tmpsr;
+ __asm__ __volatile__ ("move%.w %%sr,%0\n\tor%.l %0,%1\n\tmove%.w %1,%%sr"
+ : "=d"(__level), "=d"(__tmpsr) : "1"(0x700));
+
+ __result = *__mem;
+ *__mem = __result + __val;
+
+ __asm__ __volatile__ ("move%.w %0,%%sr" : : "d"(__level));
+
+ return __result;
+}
+
+#elif !defined(__mcf5200__) && !defined(__mcf5300__)
+// 68000, 68010, cpu32 and 5400 support test-and-set.
+
+template <int __inst>
+struct __Atomicity_lock
+{
+ static volatile unsigned char _S_atomicity_lock;
+};
+
+template <int __inst>
+volatile unsigned char __Atomicity_lock<__inst>::_S_atomicity_lock = 0;
+
+template volatile unsigned char __Atomicity_lock<0>::_S_atomicity_lock;
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+ _Atomic_word __result;
+
+ __asm__ __volatile__("1: tas %0\n\tjbne 1b"
+ : "=m"(__Atomicity_lock<0>::_S_atomicity_lock)
+ : "m"(__Atomicity_lock<0>::_S_atomicity_lock));
+
+ __result = *__mem;
+ *__mem = __result + __val;
+
+ __Atomicity_lock<0>::_S_atomicity_lock = 0;
+
+ return __result;
+}
+
+#elif defined(__vxWorks__) || defined(__embedded__)
+// The best we can hope for is to disable interrupts, which we
+// can only do from supervisor mode.
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+ _Atomic_word __result;
+ short __level, __tmpsr;
+ __asm__ __volatile__ ("move%.w %%sr,%0\n\tor%.l %0,%1\n\tmove%.w %1,%%sr"
+ : "=d"(__level), "=d"(__tmpsr) : "1"(0x700));
+
+ __result = *__mem;
+ *__mem = __result + __val;
+
+ __asm__ __volatile__ ("move%.w %0,%%sr" : : "d"(__level));
+
+ return __result;
+}
+
+#else
+// These variants do not support any atomic operations at all.
+
+#warning "__exchange_and_add is not atomic for this target"
+
+static inline _Atomic_word
+__attribute__ ((__unused__))
+__exchange_and_add (volatile _Atomic_word *__mem, int __val)
+{
+ _Atomic_word __result;
+
+ __result = *__mem;
+ *__mem = __result + __val;
+
+ return __result;
+}
+
+#endif /* CAS / IRQ / TAS */
+
+static inline void
+__attribute__ ((__unused__))
+__atomic_add (volatile _Atomic_word* __mem, int __val)
+{
+ // Careful: using add.l with a memory destination is not
+ // architecturally guaranteed to be atomic.
+ (void) __exchange_and_add (__mem, __val);
+}
+
+#endif /* atomicity.h */
diff --git a/contrib/libstdc++/config/cpu/m68k/bits/cpu_limits.h b/contrib/libstdc++/config/cpu/m68k/bits/cpu_limits.h
new file mode 100644
index 0000000..07e4e03
--- /dev/null
+++ b/contrib/libstdc++/config/cpu/m68k/bits/cpu_limits.h
@@ -0,0 +1,35 @@
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _GLIBCPP_CPU_LIMITS
+#define _GLIBCPP_CPU_LIMITS 1
+
+#define __glibcpp_long_double_bits 96
+
+#endif
+
+
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