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comparison graal/com.oracle.graal.asm/src/com/oracle/max/asm/AbstractAssembler.java @ 6497:64b7dd2075c0

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renamed projects com.oracle.max.asm* to com.oracle.graal.asm*
author Doug Simon <doug.simon@oracle.com>
date Wed, 03 Oct 2012 17:42:12 +0200
parents graal/com.oracle.max.asm/src/com/oracle/max/asm/AbstractAssembler.java@b6617d13ea44
children
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6496:16d1411409b4 6497:64b7dd2075c0
1 /*
2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.oracle.max.asm;
24
25 import com.oracle.graal.api.code.*;
26 import com.oracle.graal.api.code.Architecture.*;
27
28 /**
29 * The platform-independent base class for the assembler.
30 */
31 public abstract class AbstractAssembler {
32 public final TargetDescription target;
33 public final Buffer codeBuffer;
34
35 public AbstractAssembler(TargetDescription target) {
36 this.target = target;
37
38 if (target.arch.byteOrder == ByteOrder.BigEndian) {
39 this.codeBuffer = new Buffer.BigEndian();
40 } else {
41 this.codeBuffer = new Buffer.LittleEndian();
42 }
43 }
44
45 public final void bind(Label l) {
46 assert !l.isBound() : "can bind label only once";
47 l.bind(codeBuffer.position());
48 l.patchInstructions(this);
49 }
50
51 public abstract void align(int modulus);
52
53 public abstract void jmp(Label l);
54
55 protected abstract void patchJumpTarget(int branch, int jumpTarget);
56
57 /**
58 * Emits instruction(s) that access an address specified by a given displacement from the stack pointer
59 * in the direction that the stack grows (which is down on most architectures).
60 *
61 * @param disp the displacement from the stack pointer at which the stack should be accessed
62 */
63 public abstract void bangStack(int disp);
64
65 protected final void emitByte(int x) {
66 codeBuffer.emitByte(x);
67 }
68
69 protected final void emitShort(int x) {
70 codeBuffer.emitShort(x);
71 }
72
73 protected final void emitInt(int x) {
74 codeBuffer.emitInt(x);
75 }
76
77 protected final void emitLong(long x) {
78 codeBuffer.emitLong(x);
79 }
80 }