duke@435: /*
duke@435:  * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "incls/_precompiled.incl"
duke@435: #include "incls/_icBuffer_sparc.cpp.incl"
duke@435: 
duke@435: int InlineCacheBuffer::ic_stub_code_size() {
duke@435: #ifdef _LP64
duke@435:   if (TraceJumps) return 600 * wordSize;
duke@435:   return (NativeMovConstReg::instruction_size +  // sethi;add
duke@435:           NativeJump::instruction_size +          // sethi; jmp; delay slot
duke@435:           (1*BytesPerInstWord) + 1);            // flush + 1 extra byte
duke@435: #else
duke@435:   if (TraceJumps) return 300 * wordSize;
duke@435:   return (2+2+ 1) * wordSize + 1; // set/jump_to/nop + 1 byte so that code_end can be set in CodeBuffer
duke@435: #endif
duke@435: }
duke@435: 
duke@435: void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) {
duke@435:   ResourceMark rm;
duke@435:   CodeBuffer     code(code_begin, ic_stub_code_size());
duke@435:   MacroAssembler* masm            = new MacroAssembler(&code);
duke@435:   // note: even though the code contains an embedded oop, we do not need reloc info
duke@435:   // because
duke@435:   // (1) the oop is old (i.e., doesn't matter for scavenges)
duke@435:   // (2) these ICStubs are removed *before* a GC happens, so the roots disappear
duke@435:   assert(cached_oop == NULL || cached_oop->is_perm(), "must be old oop");
duke@435:   Address cached_oop_addr(G5_inline_cache_reg, address(cached_oop));
duke@435:   // Force the sethi to generate the fixed sequence so next_instruction_address works
duke@435:   masm->sethi(cached_oop_addr, true /* ForceRelocatable */ );
duke@435:   masm->add(cached_oop_addr, G5_inline_cache_reg);
duke@435:   assert(G3_scratch != G5_method, "Do not clobber the method oop in the transition stub");
duke@435:   assert(G3_scratch != G5_inline_cache_reg, "Do not clobber the inline cache register in the transition stub");
duke@435:   Address entry(G3_scratch, entry_point);
duke@435:   masm->JUMP(entry, 0);
duke@435:   masm->delayed()->nop();
duke@435:   masm->flush();
duke@435: }
duke@435: 
duke@435: 
duke@435: address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
duke@435:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object
duke@435:   NativeJump*        jump = nativeJump_at(move->next_instruction_address());
duke@435:   return jump->jump_destination();
duke@435: }
duke@435: 
duke@435: 
duke@435: oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) {
duke@435:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object
duke@435:   NativeJump*        jump = nativeJump_at(move->next_instruction_address());
duke@435:   return (oop)move->data();
duke@435: }