diff src/os_cpu/linux_sparc/vm/atomic_linux_sparc.inline.hpp @ 122:435e64505015

6693457: Open-source hotspot linux-sparc support Summary: Move os_cpu/linux_sparc from closed to open Reviewed-by: kamg
author phh
date Thu, 24 Apr 2008 15:07:57 -0400
parents
children d1605aabd0a1
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/linux_sparc/vm/atomic_linux_sparc.inline.hpp	Thu Apr 24 15:07:57 2008 -0400
@@ -0,0 +1,206 @@
+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// Implementation of class atomic
+
+inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
+inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
+inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
+inline void Atomic::store    (jlong    store_value, jlong*    dest) { *dest = store_value; }
+inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
+inline void Atomic::store_ptr(void*    store_value, void*     dest) { *(void**)dest = store_value; }
+
+inline void Atomic::store    (jbyte    store_value, volatile jbyte*    dest) { *dest = store_value; }
+inline void Atomic::store    (jshort   store_value, volatile jshort*   dest) { *dest = store_value; }
+inline void Atomic::store    (jint     store_value, volatile jint*     dest) { *dest = store_value; }
+inline void Atomic::store    (jlong    store_value, volatile jlong*    dest) { *dest = store_value; }
+inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
+inline void Atomic::store_ptr(void*    store_value, volatile void*     dest) { *(void* volatile *)dest = store_value; }
+
+inline void Atomic::inc    (volatile jint*     dest) { (void)add    (1, dest); }
+inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
+inline void Atomic::inc_ptr(volatile void*     dest) { (void)add_ptr(1, dest); }
+
+inline void Atomic::dec    (volatile jint*     dest) { (void)add    (-1, dest); }
+inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
+inline void Atomic::dec_ptr(volatile void*     dest) { (void)add_ptr(-1, dest); }
+
+inline jint     Atomic::add    (jint     add_value, volatile jint*     dest) {
+  intptr_t rv;
+  __asm__ volatile(
+    "1: \n\t"
+    " ld     [%2], %%o2\n\t"
+    " add    %1, %%o2, %%o3\n\t"
+    " cas    [%2], %%o2, %%o3\n\t"
+    " cmp    %%o2, %%o3\n\t"
+    " bne    1b\n\t"
+    "  nop\n\t"
+    " add    %1, %%o2, %0\n\t"
+    : "=r" (rv)
+    : "r" (add_value), "r" (dest)
+    : "memory", "o2", "o3");
+  return rv;
+}
+
+inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
+  intptr_t rv;
+#ifdef _LP64
+  __asm__ volatile(
+    "1: \n\t"
+    " ldx    [%2], %%o2\n\t"
+    " add    %0, %%o2, %%o3\n\t"
+    " casx   [%2], %%o2, %%o3\n\t"
+    " cmp    %%o2, %%o3\n\t"
+    " bne    %%xcc, 1b\n\t"
+    "  nop\n\t"
+    " add    %0, %%o2, %0\n\t"
+    : "=r" (rv)
+    : "r" (add_value), "r" (dest)
+    : "memory", "o2", "o3");
+#else
+  __asm__ volatile(
+    "1: \n\t"
+    " ld     [%2], %%o2\n\t"
+    " add    %1, %%o2, %%o3\n\t"
+    " cas    [%2], %%o2, %%o3\n\t"
+    " cmp    %%o2, %%o3\n\t"
+    " bne    1b\n\t"
+    "  nop\n\t"
+    " add    %1, %%o2, %0\n\t"
+    : "=r" (rv)
+    : "r" (add_value), "r" (dest)
+    : "memory", "o2", "o3");
+#endif // _LP64
+  return rv;
+}
+
+inline void*    Atomic::add_ptr(intptr_t add_value, volatile void*     dest) {
+  return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
+}
+
+
+inline jint     Atomic::xchg    (jint     exchange_value, volatile jint*     dest) {
+  intptr_t rv = exchange_value;
+  __asm__ volatile(
+    " swap   [%2],%1\n\t"
+    : "=r" (rv)
+    : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
+    : "memory");
+  return rv;
+}
+
+inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
+  intptr_t rv = exchange_value;
+#ifdef _LP64
+  __asm__ volatile(
+    "1:\n\t"
+    " mov    %1, %%o3\n\t"
+    " ldx    [%2], %%o2\n\t"
+    " casx   [%2], %%o2, %%o3\n\t"
+    " cmp    %%o2, %%o3\n\t"
+    " bne    %%xcc, 1b\n\t"
+    "  nop\n\t"
+    " mov    %%o2, %0\n\t"
+    : "=r" (rv)
+    : "r" (exchange_value), "r" (dest)
+    : "memory", "o2", "o3");
+#else
+  __asm__ volatile(
+    "swap    [%2],%1\n\t"
+    : "=r" (rv)
+    : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
+    : "memory");
+#endif // _LP64
+  return rv;
+}
+
+inline void*    Atomic::xchg_ptr(void*    exchange_value, volatile void*     dest) {
+  return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
+}
+
+
+inline jint     Atomic::cmpxchg    (jint     exchange_value, volatile jint*     dest, jint     compare_value) {
+  jint rv;
+  __asm__ volatile(
+    " cas    [%2], %3, %0"
+    : "=r" (rv)
+    : "0" (exchange_value), "r" (dest), "r" (compare_value)
+    : "memory");
+  return rv;
+}
+
+inline jlong    Atomic::cmpxchg    (jlong    exchange_value, volatile jlong*    dest, jlong    compare_value) {
+#ifdef _LP64
+  jlong rv;
+  __asm__ volatile(
+    " casx   [%2], %3, %0"
+    : "=r" (rv)
+    : "0" (exchange_value), "r" (dest), "r" (compare_value)
+    : "memory");
+  return rv;
+#else
+  assert(VM_Version::v9_instructions_work(), "cas only supported on v9");
+  volatile jlong_accessor evl, cvl, rv;
+  evl.long_value = exchange_value;
+  cvl.long_value = compare_value;
+
+  __asm__ volatile(
+    " sllx   %2, 32, %2\n\t"
+    " srl    %3, 0,  %3\n\t"
+    " or     %2, %3, %2\n\t"
+    " sllx   %5, 32, %5\n\t"
+    " srl    %6, 0,  %6\n\t"
+    " or     %5, %6, %5\n\t"
+    " casx   [%4], %5, %2\n\t"
+    " srl    %2, 0, %1\n\t"
+    " srlx   %2, 32, %0\n\t"
+    : "=r" (rv.words[0]), "=r" (rv.words[1])
+    : "r"  (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1])
+    : "memory");
+
+  return rv.long_value;
+#endif
+}
+
+inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
+  intptr_t rv;
+#ifdef _LP64
+  __asm__ volatile(
+    " casx    [%2], %3, %0"
+    : "=r" (rv)
+    : "0" (exchange_value), "r" (dest), "r" (compare_value)
+    : "memory");
+#else
+  __asm__ volatile(
+    " cas     [%2], %3, %0"
+    : "=r" (rv)
+    : "0" (exchange_value), "r" (dest), "r" (compare_value)
+    : "memory");
+#endif // _LP64
+  return rv;
+}
+
+inline void*    Atomic::cmpxchg_ptr(void*    exchange_value, volatile void*     dest, void*    compare_value) {
+  return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
+}