Mercurial > hg > truffle
annotate src/cpu/sparc/vm/icBuffer_sparc.cpp @ 2480:4b95bbb36464
7035870: JSR 292: Zero support
Summary: This adds support for JSR 292 to Zero.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
author | twisti |
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date | Tue, 12 Apr 2011 02:40:23 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_sparc.inline.hpp" | |
28 #include "code/icBuffer.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "interpreter/bytecodes.hpp" | |
31 #include "memory/resourceArea.hpp" | |
32 #include "nativeInst_sparc.hpp" | |
33 #include "oops/oop.inline.hpp" | |
34 #include "oops/oop.inline2.hpp" | |
0 | 35 |
36 int InlineCacheBuffer::ic_stub_code_size() { | |
37 #ifdef _LP64 | |
38 if (TraceJumps) return 600 * wordSize; | |
39 return (NativeMovConstReg::instruction_size + // sethi;add | |
40 NativeJump::instruction_size + // sethi; jmp; delay slot | |
41 (1*BytesPerInstWord) + 1); // flush + 1 extra byte | |
42 #else | |
43 if (TraceJumps) return 300 * wordSize; | |
44 return (2+2+ 1) * wordSize + 1; // set/jump_to/nop + 1 byte so that code_end can be set in CodeBuffer | |
45 #endif | |
46 } | |
47 | |
48 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) { | |
49 ResourceMark rm; | |
50 CodeBuffer code(code_begin, ic_stub_code_size()); | |
51 MacroAssembler* masm = new MacroAssembler(&code); | |
52 // note: even though the code contains an embedded oop, we do not need reloc info | |
53 // because | |
54 // (1) the oop is old (i.e., doesn't matter for scavenges) | |
55 // (2) these ICStubs are removed *before* a GC happens, so the roots disappear | |
56 assert(cached_oop == NULL || cached_oop->is_perm(), "must be old oop"); | |
727 | 57 AddressLiteral cached_oop_addrlit(cached_oop, relocInfo::none); |
58 // Force the set to generate the fixed sequence so next_instruction_address works | |
59 masm->patchable_set(cached_oop_addrlit, G5_inline_cache_reg); | |
0 | 60 assert(G3_scratch != G5_method, "Do not clobber the method oop in the transition stub"); |
61 assert(G3_scratch != G5_inline_cache_reg, "Do not clobber the inline cache register in the transition stub"); | |
727 | 62 AddressLiteral entry(entry_point); |
63 masm->JUMP(entry, G3_scratch, 0); | |
0 | 64 masm->delayed()->nop(); |
65 masm->flush(); | |
66 } | |
67 | |
68 | |
69 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { | |
70 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object | |
71 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
72 return jump->jump_destination(); | |
73 } | |
74 | |
75 | |
76 oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) { | |
77 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object | |
78 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
79 return (oop)move->data(); | |
80 } |