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annotate graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64FrameMap.java @ 15011:c8e575742f36

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allow compilation with custom RegisterConfig
author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 07 Apr 2014 19:21:22 +0200
parents f3a5036cc13c
children 76c90aa967b1
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 */
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23 package com.oracle.graal.lir.amd64;
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24
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25 import com.oracle.graal.api.code.*;
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26 import com.oracle.graal.api.meta.*;
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27 import com.oracle.graal.lir.*;
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28
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29 /**
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30 * AMD64 specific frame map.
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31 *
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32 * This is the format of an AMD64 stack frame:
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33 *
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34 * <pre>
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35 * Base Contents
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36 *
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37 * : : -----
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38 * caller | incoming overflow argument n | ^
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39 * frame : ... : | positive
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40 * | incoming overflow argument 0 | | offsets
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41 * ---------+--------------------------------+---------------------
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42 * | return address | | ^
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43 * current +--------------------------------+ | | -----
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44 * frame | | | | ^
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45 * : callee save area : | | |
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46 * | | | | |
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47 * +--------------------------------+ | | |
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48 * | spill slot 0 | | negative | |
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49 * : ... : v offsets | |
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50 * | spill slot n | ----- total frame
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51 * +--------------------------------+ frame size
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52 * | alignment padding | size |
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53 * +--------------------------------+ ----- | |
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54 * | outgoing overflow argument n | ^ | |
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55 * : ... : | positive | |
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56 * | outgoing overflow argument 0 | | offsets v v
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57 * %sp--&gt; +--------------------------------+---------------------------
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58 *
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59 * </pre>
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60 *
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61 * The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such
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62 * a block may be greater than the size of a normal spill slot or the word size.
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63 * <p>
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64 * A runtime can reserve space at the beginning of the overflow argument area. The calling
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65 * convention can specify that the first overflow stack argument is not at offset 0, but at a
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66 * specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that
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67 * call-free methods also have this space reserved. Then the VM can use the memory at offset 0
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68 * relative to the stack pointer.
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69 */
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70 public class AMD64FrameMap extends FrameMap {
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71
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72 public AMD64FrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig) {
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73 super(codeCache, registerConfig);
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74 // (negative) offset relative to sp + total frame size
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75 initialSpillSize = returnAddressSize() + calleeSaveAreaSize();
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76 spillSize = initialSpillSize;
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77 }
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78
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79 @Override
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80 public int totalFrameSize() {
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81 return frameSize() + returnAddressSize();
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82 }
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83
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84 @Override
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85 public int currentFrameSize() {
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86 return alignFrameSize(outgoingSize + spillSize - returnAddressSize());
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87 }
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88
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89 @Override
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90 protected int alignFrameSize(int size) {
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91 int x = size + returnAddressSize() + (target.stackAlignment - 1);
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92 return (x / target.stackAlignment) * target.stackAlignment - returnAddressSize();
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93 }
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94
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95 @Override
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96 public int offsetToCalleeSaveArea() {
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97 return frameSize() - calleeSaveAreaSize();
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98 }
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99
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100 @Override
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101 protected StackSlot allocateNewSpillSlot(PlatformKind kind, int additionalOffset) {
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102 return StackSlot.get(kind, -spillSize + additionalOffset, true);
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103 }
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104 }