+// SPDX-FileCopyrightText: 2009 Novell, Inc.
+// SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: MIT
+
#ifndef _URCU_UATOMIC_ARCH_S390_H
#define _URCU_UATOMIC_ARCH_S390_H
* taken from the Principles of Operation Appendix A "Conditional Swapping
* Instructions (CS, CDS)".
*
- * Copyright (c) 2009 Novell, Inc.
* Author: Jan Blunck <jblunck@suse.de>
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
*/
#include <urcu/compiler.h>
#endif /* !COMPILER_HAVE_SHORT_MEM_OPERAND */
/*
- * The __hp() macro casts the void pointer "x" to a pointer to a structure
+ * The __hp() macro casts the void pointer @x to a pointer to a structure
* containing an array of char of the specified size. This allows passing the
* @addr arguments of the following inline functions as "m" and "+m" operands
- * to the assembly.
+ * to the assembly. The @size parameter should be a constant to support
+ * compilers such as clang which do not support VLA. Create typedefs because
+ * C++ does not allow types be defined in casts.
*/
-#define __hp(size, x) ((struct { char v[size]; } *)(x))
+typedef struct { char v[4]; } __hp_4;
+typedef struct { char v[8]; } __hp_8;
+
+#define __hp(size, x) ((__hp_##size *)(x))
/* xchg */
__asm__ __volatile__(
"0: cs %0,%2," MEMOP_REF(%3) "\n"
" brc 4,0b\n"
- : "=&r" (old_val), MEMOP_OUT (__hp(len, addr))
- : "r" (val), MEMOP_IN (__hp(len, addr))
+ : "=&r" (old_val), MEMOP_OUT (__hp(4, addr))
+ : "r" (val), MEMOP_IN (__hp(4, addr))
: "memory", "cc");
return old_val;
}
__asm__ __volatile__(
"0: csg %0,%2," MEMOP_REF(%3) "\n"
" brc 4,0b\n"
- : "=&r" (old_val), MEMOP_OUT (__hp(len, addr))
- : "r" (val), MEMOP_IN (__hp(len, addr))
+ : "=&r" (old_val), MEMOP_OUT (__hp(8, addr))
+ : "r" (val), MEMOP_IN (__hp(8, addr))
: "memory", "cc");
return old_val;
}
__asm__ __volatile__(
" cs %0,%2," MEMOP_REF(%3) "\n"
- : "+r" (old_val), MEMOP_OUT (__hp(len, addr))
- : "r" (_new), MEMOP_IN (__hp(len, addr))
+ : "+r" (old_val), MEMOP_OUT (__hp(4, addr))
+ : "r" (_new), MEMOP_IN (__hp(4, addr))
: "memory", "cc");
return old_val;
}
{
__asm__ __volatile__(
" csg %0,%2," MEMOP_REF(%3) "\n"
- : "+r" (old), MEMOP_OUT (__hp(len, addr))
- : "r" (_new), MEMOP_IN (__hp(len, addr))
+ : "+r" (old), MEMOP_OUT (__hp(8, addr))
+ : "r" (_new), MEMOP_IN (__hp(8, addr))
: "memory", "cc");
return old;
}