diff -r d4f8e348420a -r 9f644073d3a0 hotspot/src/os_cpu/solaris_x86/vm/atomic_solaris_x86.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/os_cpu/solaris_x86/vm/atomic_solaris_x86.hpp Sun Aug 21 20:56:37 2016 -0400 @@ -0,0 +1,278 @@ +/* + * Copyright (c) 1999, 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP +#define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP + +#include "runtime/os.hpp" + +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. + +// The lock prefix can be omitted for certain instructions on uniprocessors; to +// facilitate this, os::is_MP() is passed as an additional argument. 64-bit +// processors are assumed to be multi-threaded and/or multi-core, so the extra +// argument is unnecessary. +#ifndef _LP64 +#define IS_MP_DECL() , int is_mp +#define IS_MP_ARG() , (int) os::is_MP() +#else +#define IS_MP_DECL() +#define IS_MP_ARG() +#endif // _LP64 + +extern "C" { + jint _Atomic_add(jint add_value, volatile jint* dest IS_MP_DECL()); + jint _Atomic_xchg(jint exchange_value, volatile jint* dest); + jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest, + jbyte compare_value IS_MP_DECL()); + jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, + jint compare_value IS_MP_DECL()); + jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, + jlong compare_value IS_MP_DECL()); +} + +inline jint Atomic::add (jint add_value, volatile jint* dest) { + return _Atomic_add(add_value, dest IS_MP_ARG()); +} + +inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { + return _Atomic_xchg(exchange_value, dest); +} + +#define VM_HAS_SPECIALIZED_CMPXCHG_BYTE +inline jbyte Atomic::cmpxchg (jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, cmpxchg_memory_order order) { + return _Atomic_cmpxchg_byte(exchange_value, dest, compare_value IS_MP_ARG()); +} + +inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value, cmpxchg_memory_order order) { + return _Atomic_cmpxchg(exchange_value, dest, compare_value IS_MP_ARG()); +} + +inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value, cmpxchg_memory_order order) { + return _Atomic_cmpxchg_long(exchange_value, dest, compare_value IS_MP_ARG()); +} + + +#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); +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); +} + +inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { + return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)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, cmpxchg_memory_order order) { + return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); +} + +inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { + return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); +} + +inline jlong Atomic::load(volatile jlong* src) { return *src; } + +#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 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, cmpxchg_memory_order order) { + return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); +} + +inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value, cmpxchg_memory_order order) { + return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value, order); +} + +extern "C" void _Atomic_move_long(volatile jlong* src, volatile jlong* dst); + +inline jlong Atomic::load(volatile jlong* src) { + volatile jlong dest; + _Atomic_move_long(src, &dest); + return dest; +} + +inline void Atomic::store(jlong store_value, jlong* dest) { + _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest); +} + +inline void Atomic::store(jlong store_value, volatile jlong* dest) { + _Atomic_move_long((volatile jlong*)&store_value, dest); +} + +#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) { + __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; + } + + + inline jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value, int mp) { + __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgb %1,(%3)" + : "=a" (exchange_value) + : "q" (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 + +#endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP