| /* |
| * 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. |
| * |
| */ |
| |
| 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_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_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); } |
| |
| // For Sun Studio - implementation is in solaris_x86_[32/64].il. |
| // For gcc - implementation is just below. |
| |
| extern "C" jint _Atomic_add(jint add_value, volatile jint* dest, int mp); |
| extern "C" jint _Atomic_xchg(jint exchange_value, volatile jint* dest); |
| extern "C" jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp); |
| extern "C" jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp); |
| |
| inline jint Atomic::add (jint add_value, volatile jint* dest) { |
| return _Atomic_add(add_value, dest, (int) os::is_MP()); |
| } |
| |
| inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { |
| return _Atomic_cmpxchg(exchange_value, dest, compare_value, (int) os::is_MP()); |
| } |
| |
| inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { |
| return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, (int) os::is_MP()); |
| } |
| |
| |
| #ifdef AMD64 |
| inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } |
| inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } |
| extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp); |
| extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest); |
| |
| inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { |
| return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest, (int) os::is_MP()); |
| } |
| |
| inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { |
| return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest, (int) os::is_MP()); |
| } |
| |
| inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
| return _Atomic_xchg(exchange_value, dest); |
| } |
| |
| inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
| return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest); |
| } |
| |
| inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
| return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest); |
| } |
| |
| inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { |
| return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, (int) os::is_MP()); |
| } |
| |
| inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { |
| return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value, (int) os::is_MP()); |
| } |
| |
| #else // !AMD64 |
| |
| inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { |
| return (intptr_t)add((jint)add_value, (volatile jint*)dest); |
| } |
| |
| inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { |
| return (void*)add((jint)add_value, (volatile jint*)dest); |
| } |
| |
| inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { |
| // We noticed a CC5.5 bug (4894807), so keep calling the stub just to be safe. |
| // Will use the inline template version after 4894807 is fixed. |
| // return _Atomic_xchg(exchange_value, dest); |
| return (*os::atomic_xchg_func)(exchange_value, dest); |
| } |
| |
| inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { |
| return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); |
| } |
| |
| inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { |
| return (void*)xchg((jint)exchange_value, (volatile jint*)dest); |
| } |
| |
| inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { |
| return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); |
| } |
| |
| inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { |
| return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); |
| } |
| #endif // AMD64 |
| |
| #ifdef _GNU_SOURCE |
| // Add a lock prefix to an instruction on an MP machine |
| #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: " |
| |
| extern "C" { |
| inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) { |
| jint addend = add_value; |
| __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)" |
| : "=r" (addend) |
| : "0" (addend), "r" (dest), "r" (mp) |
| : "cc", "memory"); |
| return addend + add_value; |
| } |
| |
| #ifdef AMD64 |
| inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) { |
| intptr_t addend = add_value; |
| __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)" |
| : "=r" (addend) |
| : "0" (addend), "r" (dest), "r" (mp) |
| : "cc", "memory"); |
| return addend + add_value; |
| } |
| |
| inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) { |
| __asm__ __volatile__ ("xchgq (%2),%0" |
| : "=r" (exchange_value) |
| : "0" (exchange_value), "r" (dest) |
| : "memory"); |
| return exchange_value; |
| } |
| |
| #endif // AMD64 |
| |
| inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) { |
| |
| // 32bit version originally did nothing!! |
| |
| __asm__ __volatile__ ("xchgl (%2),%0" |
| : "=r" (exchange_value) |
| : "0" (exchange_value), "r" (dest) |
| : "memory"); |
| return exchange_value; |
| } |
| |
| inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) { |
| __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)" |
| : "=a" (exchange_value) |
| : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) |
| : "cc", "memory"); |
| return exchange_value; |
| } |
| |
| // This is the interface to the atomic instruction in solaris_i486.s. |
| jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp); |
| |
| inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) { |
| #ifdef AMD64 |
| __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)" |
| : "=a" (exchange_value) |
| : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) |
| : "cc", "memory"); |
| return exchange_value; |
| #else |
| return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP()); |
| |
| #if 0 |
| // The code below does not work presumably because of the bug in gcc |
| // The error message says: |
| // can't find a register in class BREG while reloading asm |
| // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc |
| // with such inline asm code: |
| |
| volatile jlong_accessor evl, cvl, rv; |
| evl.long_value = exchange_value; |
| cvl.long_value = compare_value; |
| int mp = os::is_MP(); |
| |
| __asm__ volatile ("cmp $0, %%esi\n\t" |
| "je 1f \n\t" |
| "lock\n\t" |
| "1: cmpxchg8b (%%edi)\n\t" |
| : "=a"(cvl.words[0]), "=d"(cvl.words[1]) |
| : "a"(cvl.words[0]), "d"(cvl.words[1]), |
| "b"(evl.words[0]), "c"(evl.words[1]), |
| "D"(dest), "S"(mp) |
| : "cc", "memory"); |
| return cvl.long_value; |
| #endif // if 0 |
| #endif // AMD64 |
| } |
| } |
| #undef LOCK_IF_MP |
| |
| #endif // _GNU_SOURCE |
