| 1 | ;;; jvm-instructions.lisp |
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| 2 | ;;; |
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| 3 | ;;; Copyright (C) 2003-2006 Peter Graves |
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| 4 | ;;; Copyright (C) 2010 Erik Huelsmann |
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| 5 | ;;; $Id: jvm-instructions.lisp 13535 2011-08-23 20:35:32Z ehuelsmann $ |
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| 6 | ;;; |
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| 7 | ;;; This program is free software; you can redistribute it and/or |
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| 8 | ;;; modify it under the terms of the GNU General Public License |
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| 9 | ;;; as published by the Free Software Foundation; either version 2 |
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| 10 | ;;; of the License, or (at your option) any later version. |
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| 11 | ;;; |
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| 12 | ;;; This program is distributed in the hope that it will be useful, |
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| 13 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | ;;; GNU General Public License for more details. |
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| 16 | ;;; |
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| 17 | ;;; You should have received a copy of the GNU General Public License |
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| 18 | ;;; along with this program; if not, write to the Free Software |
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| 19 | ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | ;;; |
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| 21 | ;;; As a special exception, the copyright holders of this library give you |
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| 22 | ;;; permission to link this library with independent modules to produce an |
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| 23 | ;;; executable, regardless of the license terms of these independent |
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| 24 | ;;; modules, and to copy and distribute the resulting executable under |
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| 25 | ;;; terms of your choice, provided that you also meet, for each linked |
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| 26 | ;;; independent module, the terms and conditions of the license of that |
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| 27 | ;;; module. An independent module is a module which is not derived from |
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| 28 | ;;; or based on this library. If you modify this library, you may extend |
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| 29 | ;;; this exception to your version of the library, but you are not |
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| 30 | ;;; obligated to do so. If you do not wish to do so, delete this |
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| 31 | ;;; exception statement from your version. |
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| 32 | |
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| 33 | (in-package #:jvm) |
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| 34 | |
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| 35 | |
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| 36 | ;; OPCODES |
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| 37 | |
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| 38 | (defconst *opcode-table* (make-array 256)) |
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| 39 | |
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| 40 | (defconst *opcodes* (make-hash-table :test 'equalp)) |
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| 41 | |
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| 42 | (defstruct jvm-opcode name number size stack-effect register-used) |
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| 43 | |
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| 44 | (defun %define-opcode (name number size stack-effect register) |
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| 45 | (declare (type fixnum number size)) |
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| 46 | (let* ((name (string name)) |
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| 47 | (opcode (make-jvm-opcode :name name |
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| 48 | :number number |
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| 49 | :size size |
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| 50 | :stack-effect stack-effect |
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| 51 | :register-used register))) |
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| 52 | (setf (svref *opcode-table* number) opcode) |
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| 53 | (setf (gethash name *opcodes*) opcode) |
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| 54 | (setf (gethash number *opcodes*) opcode))) |
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| 55 | |
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| 56 | (defmacro define-opcode (name number size stack-effect register) |
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| 57 | `(%define-opcode ',name ,number ,size ,stack-effect ,register)) |
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| 58 | |
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| 59 | ;; name number size stack-effect register-used |
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| 60 | (define-opcode nop 0 1 0 nil) |
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| 61 | (define-opcode aconst_null 1 1 1 nil) |
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| 62 | (define-opcode iconst_m1 2 1 1 nil) |
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| 63 | (define-opcode iconst_0 3 1 1 nil) |
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| 64 | (define-opcode iconst_1 4 1 1 nil) |
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| 65 | (define-opcode iconst_2 5 1 1 nil) |
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| 66 | (define-opcode iconst_3 6 1 1 nil) |
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| 67 | (define-opcode iconst_4 7 1 1 nil) |
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| 68 | (define-opcode iconst_5 8 1 1 nil) |
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| 69 | (define-opcode lconst_0 9 1 2 nil) |
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| 70 | (define-opcode lconst_1 10 1 2 nil) |
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| 71 | (define-opcode fconst_0 11 1 1 nil) |
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| 72 | (define-opcode fconst_1 12 1 1 nil) |
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| 73 | (define-opcode fconst_2 13 1 1 nil) |
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| 74 | (define-opcode dconst_0 14 1 2 nil) |
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| 75 | (define-opcode dconst_1 15 1 2 nil) |
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| 76 | (define-opcode bipush 16 2 1 nil) |
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| 77 | (define-opcode sipush 17 3 1 nil) |
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| 78 | (define-opcode ldc 18 2 1 nil) |
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| 79 | (define-opcode ldc_w 19 3 1 nil) |
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| 80 | (define-opcode ldc2_w 20 3 2 nil) |
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| 81 | (define-opcode iload 21 2 1 t) |
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| 82 | (define-opcode lload 22 2 2 t) |
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| 83 | (define-opcode fload 23 2 nil t) |
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| 84 | (define-opcode dload 24 2 nil t) |
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| 85 | (define-opcode aload 25 2 1 t) |
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| 86 | (define-opcode iload_0 26 1 1 0) |
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| 87 | (define-opcode iload_1 27 1 1 1) |
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| 88 | (define-opcode iload_2 28 1 1 2) |
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| 89 | (define-opcode iload_3 29 1 1 3) |
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| 90 | (define-opcode lload_0 30 1 2 0) |
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| 91 | (define-opcode lload_1 31 1 2 1) |
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| 92 | (define-opcode lload_2 32 1 2 2) |
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| 93 | (define-opcode lload_3 33 1 2 3) |
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| 94 | (define-opcode fload_0 34 1 nil 0) |
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| 95 | (define-opcode fload_1 35 1 nil 1) |
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| 96 | (define-opcode fload_2 36 1 nil 2) |
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| 97 | (define-opcode fload_3 37 1 nil 3) |
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| 98 | (define-opcode dload_0 38 1 nil 0) |
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| 99 | (define-opcode dload_1 39 1 nil 1) |
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| 100 | (define-opcode dload_2 40 1 nil 2) |
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| 101 | (define-opcode dload_3 41 1 nil 3) |
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| 102 | (define-opcode aload_0 42 1 1 0) |
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| 103 | (define-opcode aload_1 43 1 1 1) |
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| 104 | (define-opcode aload_2 44 1 1 2) |
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| 105 | (define-opcode aload_3 45 1 1 3) |
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| 106 | (define-opcode iaload 46 1 -1 nil) |
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| 107 | (define-opcode laload 47 1 0 nil) |
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| 108 | (define-opcode faload 48 1 -1 nil) |
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| 109 | (define-opcode daload 49 1 0 nil) |
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| 110 | (define-opcode aaload 50 1 -1 nil) |
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| 111 | (define-opcode baload 51 1 nil nil) |
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| 112 | (define-opcode caload 52 1 nil nil) |
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| 113 | (define-opcode saload 53 1 nil nil) |
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| 114 | (define-opcode istore 54 2 -1 t) |
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| 115 | (define-opcode lstore 55 2 -2 t) |
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| 116 | (define-opcode fstore 56 2 nil t) |
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| 117 | (define-opcode dstore 57 2 nil t) |
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| 118 | (define-opcode astore 58 2 -1 t) |
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| 119 | (define-opcode istore_0 59 1 -1 0) |
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| 120 | (define-opcode istore_1 60 1 -1 1) |
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| 121 | (define-opcode istore_2 61 1 -1 2) |
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| 122 | (define-opcode istore_3 62 1 -1 3) |
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| 123 | (define-opcode lstore_0 63 1 -2 0) |
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| 124 | (define-opcode lstore_1 64 1 -2 1) |
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| 125 | (define-opcode lstore_2 65 1 -2 2) |
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| 126 | (define-opcode lstore_3 66 1 -2 3) |
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| 127 | (define-opcode fstore_0 67 1 nil 0) |
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| 128 | (define-opcode fstore_1 68 1 nil 1) |
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| 129 | (define-opcode fstore_2 69 1 nil 2) |
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| 130 | (define-opcode fstore_3 70 1 nil 3) |
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| 131 | (define-opcode dstore_0 71 1 nil 0) |
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| 132 | (define-opcode dstore_1 72 1 nil 1) |
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| 133 | (define-opcode dstore_2 73 1 nil 2) |
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| 134 | (define-opcode dstore_3 74 1 nil 3) |
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| 135 | (define-opcode astore_0 75 1 -1 0) |
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| 136 | (define-opcode astore_1 76 1 -1 1) |
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| 137 | (define-opcode astore_2 77 1 -1 2) |
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| 138 | (define-opcode astore_3 78 1 -1 3) |
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| 139 | (define-opcode iastore 79 1 -3 nil) |
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| 140 | (define-opcode lastore 80 1 -4 nil) |
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| 141 | (define-opcode fastore 81 1 -3 nil) |
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| 142 | (define-opcode dastore 82 1 -4 nil) |
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| 143 | (define-opcode aastore 83 1 -3 nil) |
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| 144 | (define-opcode bastore 84 1 nil nil) |
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| 145 | (define-opcode castore 85 1 nil nil) |
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| 146 | (define-opcode sastore 86 1 nil nil) |
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| 147 | (define-opcode pop 87 1 -1 nil) |
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| 148 | (define-opcode pop2 88 1 -2 nil) |
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| 149 | (define-opcode dup 89 1 1 nil) |
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| 150 | (define-opcode dup_x1 90 1 1 nil) |
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| 151 | (define-opcode dup_x2 91 1 1 nil) |
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| 152 | (define-opcode dup2 92 1 2 nil) |
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| 153 | (define-opcode dup2_x1 93 1 2 nil) |
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| 154 | (define-opcode dup2_x2 94 1 2 nil) |
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| 155 | (define-opcode swap 95 1 0 nil) |
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| 156 | (define-opcode iadd 96 1 -1 nil) |
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| 157 | (define-opcode ladd 97 1 -2 nil) |
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| 158 | (define-opcode fadd 98 1 -1 nil) |
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| 159 | (define-opcode dadd 99 1 -2 nil) |
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| 160 | (define-opcode isub 100 1 -1 nil) |
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| 161 | (define-opcode lsub 101 1 -2 nil) |
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| 162 | (define-opcode fsub 102 1 -1 nil) |
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| 163 | (define-opcode dsub 103 1 -2 nil) |
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| 164 | (define-opcode imul 104 1 -1 nil) |
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| 165 | (define-opcode lmul 105 1 -2 nil) |
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| 166 | (define-opcode fmul 106 1 -1 nil) |
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| 167 | (define-opcode dmul 107 1 -2 nil) |
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| 168 | (define-opcode idiv 108 1 nil nil) |
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| 169 | (define-opcode ldiv 109 1 nil nil) |
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| 170 | (define-opcode fdiv 110 1 nil nil) |
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| 171 | (define-opcode ddiv 111 1 nil nil) |
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| 172 | (define-opcode irem 112 1 nil nil) |
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| 173 | (define-opcode lrem 113 1 nil nil) |
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| 174 | (define-opcode frem 114 1 nil nil) |
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| 175 | (define-opcode drem 115 1 nil nil) |
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| 176 | (define-opcode ineg 116 1 0 nil) |
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| 177 | (define-opcode lneg 117 1 0 nil) |
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| 178 | (define-opcode fneg 118 1 0 nil) |
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| 179 | (define-opcode dneg 119 1 0 nil) |
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| 180 | (define-opcode ishl 120 1 -1 nil) |
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| 181 | (define-opcode lshl 121 1 -1 nil) |
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| 182 | (define-opcode ishr 122 1 -1 nil) |
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| 183 | (define-opcode lshr 123 1 -1 nil) |
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| 184 | (define-opcode iushr 124 1 nil nil) |
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| 185 | (define-opcode lushr 125 1 nil nil) |
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| 186 | (define-opcode iand 126 1 -1 nil) |
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| 187 | (define-opcode land 127 1 -2 nil) |
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| 188 | (define-opcode ior 128 1 -1 nil) |
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| 189 | (define-opcode lor 129 1 -2 nil) |
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| 190 | (define-opcode ixor 130 1 -1 nil) |
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| 191 | (define-opcode lxor 131 1 -2 nil) |
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| 192 | (define-opcode iinc 132 3 0 t) |
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| 193 | (define-opcode i2l 133 1 1 nil) |
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| 194 | (define-opcode i2f 134 1 0 nil) |
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| 195 | (define-opcode i2d 135 1 1 nil) |
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| 196 | (define-opcode l2i 136 1 -1 nil) |
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| 197 | (define-opcode l2f 137 1 -1 nil) |
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| 198 | (define-opcode l2d 138 1 0 nil) |
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| 199 | (define-opcode f2i 139 1 nil nil) |
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| 200 | (define-opcode f2l 140 1 nil nil) |
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| 201 | (define-opcode f2d 141 1 1 nil) |
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| 202 | (define-opcode d2i 142 1 nil nil) |
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| 203 | (define-opcode d2l 143 1 nil nil) |
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| 204 | (define-opcode d2f 144 1 -1 nil) |
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| 205 | (define-opcode i2b 145 1 nil nil) |
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| 206 | (define-opcode i2c 146 1 nil nil) |
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| 207 | (define-opcode i2s 147 1 nil nil) |
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| 208 | (define-opcode lcmp 148 1 -3 nil) |
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| 209 | (define-opcode fcmpl 149 1 -1 nil) |
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| 210 | (define-opcode fcmpg 150 1 -1 nil) |
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| 211 | (define-opcode dcmpl 151 1 -3 nil) |
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| 212 | (define-opcode dcmpg 152 1 -3 nil) |
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| 213 | (define-opcode ifeq 153 3 -1 nil) |
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| 214 | (define-opcode ifne 154 3 -1 nil) |
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| 215 | (define-opcode iflt 155 3 -1 nil) |
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| 216 | (define-opcode ifge 156 3 -1 nil) |
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| 217 | (define-opcode ifgt 157 3 -1 nil) |
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| 218 | (define-opcode ifle 158 3 -1 nil) |
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| 219 | (define-opcode if_icmpeq 159 3 -2 nil) |
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| 220 | (define-opcode if_icmpne 160 3 -2 nil) |
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| 221 | (define-opcode if_icmplt 161 3 -2 nil) |
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| 222 | (define-opcode if_icmpge 162 3 -2 nil) |
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| 223 | (define-opcode if_icmpgt 163 3 -2 nil) |
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| 224 | (define-opcode if_icmple 164 3 -2 nil) |
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| 225 | (define-opcode if_acmpeq 165 3 -2 nil) |
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| 226 | (define-opcode if_acmpne 166 3 -2 nil) |
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| 227 | (define-opcode goto 167 3 0 nil) |
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| 228 | ;;(define-opcode jsr 168 3 1) Don't use these 2 opcodes: deprecated |
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| 229 | ;;(define-opcode ret 169 2 0) their use results in JVM verifier errors |
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| 230 | (define-opcode tableswitch 170 0 nil nil) |
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| 231 | (define-opcode lookupswitch 171 0 nil nil) |
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| 232 | (define-opcode ireturn 172 1 nil nil) |
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| 233 | (define-opcode lreturn 173 1 nil nil) |
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| 234 | (define-opcode freturn 174 1 nil nil) |
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| 235 | (define-opcode dreturn 175 1 nil nil) |
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| 236 | (define-opcode areturn 176 1 -1 nil) |
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| 237 | (define-opcode return 177 1 0 nil) |
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| 238 | (define-opcode getstatic 178 3 1 nil) |
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| 239 | (define-opcode putstatic 179 3 -1 nil) |
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| 240 | (define-opcode getfield 180 3 0 nil) |
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| 241 | (define-opcode putfield 181 3 -2 nil) |
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| 242 | (define-opcode invokevirtual 182 3 nil nil) |
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| 243 | (define-opcode invokespecial 183 3 nil nil) |
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| 244 | (define-opcode invokestatic 184 3 nil nil) |
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| 245 | (define-opcode invokeinterface 185 5 nil nil) |
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| 246 | (define-opcode unused 186 0 nil nil) |
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| 247 | (define-opcode new 187 3 1 nil) |
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| 248 | (define-opcode newarray 188 2 nil nil) |
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| 249 | (define-opcode anewarray 189 3 0 nil) |
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| 250 | (define-opcode arraylength 190 1 0 nil) |
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| 251 | (define-opcode athrow 191 1 0 nil) |
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| 252 | (define-opcode checkcast 192 3 0 nil) |
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| 253 | (define-opcode instanceof 193 3 0 nil) |
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| 254 | (define-opcode monitorenter 194 1 -1 nil) |
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| 255 | (define-opcode monitorexit 195 1 -1 nil) |
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| 256 | (define-opcode wide 196 0 nil nil) |
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| 257 | (define-opcode multianewarray 197 4 nil nil) |
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| 258 | (define-opcode ifnull 198 3 -1 nil) |
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| 259 | (define-opcode ifnonnull 199 3 nil nil) |
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| 260 | (define-opcode goto_w 200 5 nil nil) |
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| 261 | ;; (define-opcode jsr_w 201 5 nil) Don't use: deprecated |
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| 262 | (define-opcode label 202 0 0 nil) ;; virtual: does not exist in the JVM |
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| 263 | ;; (define-opcode push-value 203 nil 1) |
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| 264 | ;; (define-opcode store-value 204 nil -1) |
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| 265 | (define-opcode clear-values 205 0 0 t) ;; virtual: does not exist in the JVM |
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| 266 | ;;(define-opcode var-ref 206 0 0) |
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| 267 | |
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| 268 | (defparameter *last-opcode* 206) |
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| 269 | |
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| 270 | (declaim (ftype (function (t) t) opcode-name)) |
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| 271 | (defun opcode-name (opcode-number) |
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| 272 | (let ((opcode (gethash opcode-number *opcodes*))) |
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| 273 | (and opcode (jvm-opcode-name opcode)))) |
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| 274 | |
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| 275 | (declaim (ftype (function (t) (integer 0 255)) opcode-number)) |
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| 276 | (defun opcode-number (opcode-name) |
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| 277 | (declare (optimize speed)) |
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| 278 | (let ((opcode (gethash (string opcode-name) *opcodes*))) |
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| 279 | (if opcode |
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| 280 | (jvm-opcode-number opcode) |
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| 281 | (error "Unknown opcode ~S." opcode-name)))) |
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| 282 | |
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| 283 | (declaim (ftype (function (t) fixnum) opcode-size)) |
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| 284 | (defun opcode-size (opcode-number) |
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| 285 | (declare (optimize speed (safety 0))) |
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| 286 | (declare (type (integer 0 255) opcode-number)) |
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| 287 | (jvm-opcode-size (svref *opcode-table* opcode-number))) |
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| 288 | |
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| 289 | (declaim (ftype (function (t) t) opcode-stack-effect)) |
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| 290 | (defun opcode-stack-effect (opcode-number) |
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| 291 | (declare (optimize speed)) |
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| 292 | (jvm-opcode-stack-effect (svref *opcode-table* opcode-number))) |
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| 293 | |
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| 294 | |
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| 295 | |
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| 296 | |
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| 297 | ;; INSTRUCTION |
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| 298 | |
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| 299 | (defstruct (instruction (:constructor %make-instruction (opcode args))) |
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| 300 | (opcode 0 :type (integer 0 255)) |
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| 301 | args |
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| 302 | stack |
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| 303 | depth |
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| 304 | wide) |
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| 305 | |
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| 306 | (defun make-instruction (opcode args) |
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| 307 | (let ((inst (apply #'%make-instruction |
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| 308 | (list opcode |
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| 309 | (remove :wide-prefix args))))) |
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| 310 | (when (memq :wide-prefix args) |
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| 311 | (setf (inst-wide inst) t)) |
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| 312 | inst)) |
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| 313 | |
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| 314 | (defun print-instruction (instruction) |
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| 315 | (sys::%format nil "~A ~A stack = ~S depth = ~S" |
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| 316 | (opcode-name (instruction-opcode instruction)) |
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| 317 | (instruction-args instruction) |
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| 318 | (instruction-stack instruction) |
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| 319 | (instruction-depth instruction))) |
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| 320 | |
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| 321 | (declaim (ftype (function (t) t) instruction-label)) |
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| 322 | (defun instruction-label (instruction) |
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| 323 | (and instruction |
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| 324 | (= (instruction-opcode (the instruction instruction)) 202) |
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| 325 | (car (instruction-args instruction)))) |
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| 326 | |
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| 327 | |
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| 328 | |
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| 329 | (defknown inst * t) |
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| 330 | (defun inst (instr &optional args) |
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| 331 | (declare (optimize speed)) |
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| 332 | (let ((opcode (if (fixnump instr) |
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| 333 | instr |
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| 334 | (opcode-number instr)))) |
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| 335 | (unless (listp args) |
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| 336 | (setf args (list args))) |
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| 337 | (make-instruction opcode args))) |
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| 338 | |
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| 339 | |
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| 340 | ;; Having %emit and %%emit output their code to *code* |
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| 341 | ;; is currently an implementation detail exposed to all users. |
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| 342 | ;; We need to have APIs to address this, but for now pass2 is |
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| 343 | ;; our only user and we'll hard-code the use of *code*. |
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| 344 | (defvar *code* nil) |
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| 345 | |
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| 346 | (defknown %%emit * t) |
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| 347 | (defun %%emit (instr &rest args) |
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| 348 | (declare (optimize speed)) |
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| 349 | (let ((instruction (make-instruction instr args))) |
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| 350 | (push instruction *code*) |
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| 351 | instruction)) |
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| 352 | |
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| 353 | (defknown %emit * t) |
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| 354 | (defun %emit (instr &rest args) |
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| 355 | (declare (optimize speed)) |
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| 356 | (let ((instruction (inst instr args))) |
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| 357 | (push instruction *code*) |
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| 358 | instruction)) |
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| 359 | |
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| 360 | (defmacro emit (instr &rest args) |
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| 361 | (when (and (consp instr) |
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| 362 | (eq (car instr) 'QUOTE) |
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| 363 | (symbolp (cadr instr))) |
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| 364 | (setf instr (opcode-number (cadr instr)))) |
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| 365 | (if (fixnump instr) |
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| 366 | `(%%emit ,instr ,@args) |
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| 367 | `(%emit ,instr ,@args))) |
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| 368 | |
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| 369 | |
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| 370 | ;; Helper routines |
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| 371 | |
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| 372 | (defknown label (symbol) t) |
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| 373 | (defun label (symbol) |
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| 374 | (declare (type symbol symbol)) |
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| 375 | (declare (optimize speed)) |
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| 376 | (emit 'label symbol) |
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| 377 | (setf (symbol-value symbol) nil)) |
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| 378 | |
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| 379 | (defknown aload (fixnum) t) |
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| 380 | (defun aload (index) |
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| 381 | (case index |
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| 382 | (0 (emit 'aload_0)) |
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| 383 | (1 (emit 'aload_1)) |
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| 384 | (2 (emit 'aload_2)) |
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| 385 | (3 (emit 'aload_3)) |
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| 386 | (t (emit 'aload index)))) |
|---|
| 387 | |
|---|
| 388 | (defknown astore (fixnum) t) |
|---|
| 389 | (defun astore (index) |
|---|
| 390 | (case index |
|---|
| 391 | (0 (emit 'astore_0)) |
|---|
| 392 | (1 (emit 'astore_1)) |
|---|
| 393 | (2 (emit 'astore_2)) |
|---|
| 394 | (3 (emit 'astore_3)) |
|---|
| 395 | (t (emit 'astore index)))) |
|---|
| 396 | |
|---|
| 397 | (declaim (ftype (function (t) t) branch-p) |
|---|
| 398 | (inline branch-p)) |
|---|
| 399 | (defun branch-p (opcode) |
|---|
| 400 | ;; (declare (optimize speed)) |
|---|
| 401 | ;; (declare (type '(integer 0 255) opcode)) |
|---|
| 402 | (or (<= 153 opcode 167) |
|---|
| 403 | (<= 198 opcode 200))) ;; ifnull / ifnonnull / goto_w |
|---|
| 404 | |
|---|
| 405 | (declaim (ftype (function (t) t) unconditional-control-transfer-p) |
|---|
| 406 | (inline unconditional-control-transfer-p)) |
|---|
| 407 | (defun unconditional-control-transfer-p (opcode) |
|---|
| 408 | (or (= 167 opcode) ;; goto |
|---|
| 409 | (= 200 opcode) ;; goto_w |
|---|
| 410 | (<= 172 opcode 177) ;; ?return |
|---|
| 411 | (= 191 opcode) ;; athrow |
|---|
| 412 | )) |
|---|
| 413 | |
|---|
| 414 | (declaim (ftype (function (t) boolean) label-p) |
|---|
| 415 | (inline label-p)) |
|---|
| 416 | (defun label-p (instruction) |
|---|
| 417 | (and instruction |
|---|
| 418 | (= (the fixnum (instruction-opcode (the instruction instruction))) 202))) |
|---|
| 419 | |
|---|
| 420 | (defun print-code (code) |
|---|
| 421 | (dotimes (i (length code)) |
|---|
| 422 | (let ((instruction (elt code i))) |
|---|
| 423 | (sys::%format t "~D ~A ~S ~S ~S~%" |
|---|
| 424 | i |
|---|
| 425 | (opcode-name (instruction-opcode instruction)) |
|---|
| 426 | (instruction-args instruction) |
|---|
| 427 | (instruction-stack instruction) |
|---|
| 428 | (instruction-depth instruction))))) |
|---|
| 429 | |
|---|
| 430 | (defun print-code2 (code) |
|---|
| 431 | (dotimes (i (length code)) |
|---|
| 432 | (let ((instruction (elt code i))) |
|---|
| 433 | (case (instruction-opcode instruction) |
|---|
| 434 | (202 ; LABEL |
|---|
| 435 | (format t "~A:~%" (car (instruction-args instruction)))) |
|---|
| 436 | (t |
|---|
| 437 | (format t "~8D: ~A ~S~%" |
|---|
| 438 | i |
|---|
| 439 | (opcode-name (instruction-opcode instruction)) |
|---|
| 440 | (instruction-args instruction))))))) |
|---|
| 441 | |
|---|
| 442 | (defun expand-virtual-instructions (code) |
|---|
| 443 | (let* ((len (length code)) |
|---|
| 444 | (vector (make-array (ash len 1) :fill-pointer 0 :adjustable t))) |
|---|
| 445 | (dotimes (index len vector) |
|---|
| 446 | (declare (type (unsigned-byte 16) index)) |
|---|
| 447 | (let ((instruction (svref code index))) |
|---|
| 448 | (case (instruction-opcode instruction) |
|---|
| 449 | (205 ; CLEAR-VALUES |
|---|
| 450 | (dolist (instruction |
|---|
| 451 | (list |
|---|
| 452 | (inst 'aload (car (instruction-args instruction))) |
|---|
| 453 | (inst 'aconst_null) |
|---|
| 454 | (inst 'putfield (u2 (pool-field +lisp-thread+ "_values" |
|---|
| 455 | +lisp-object-array+))))) |
|---|
| 456 | (vector-push-extend instruction vector))) |
|---|
| 457 | (t |
|---|
| 458 | (vector-push-extend instruction vector))))))) |
|---|
| 459 | |
|---|
| 460 | |
|---|
| 461 | ;; RESOLVERS |
|---|
| 462 | |
|---|
| 463 | (defun unsupported-opcode (instruction) |
|---|
| 464 | (error "Unsupported opcode ~D." (instruction-opcode instruction))) |
|---|
| 465 | |
|---|
| 466 | (declaim (type hash-table +resolvers+)) |
|---|
| 467 | (defconst +resolvers+ (make-hash-table)) |
|---|
| 468 | |
|---|
| 469 | (defun initialize-resolvers () |
|---|
| 470 | (let ((ht +resolvers+)) |
|---|
| 471 | (dotimes (n (1+ *last-opcode*)) |
|---|
| 472 | (setf (gethash n ht) #'unsupported-opcode)) |
|---|
| 473 | ;; The following opcodes resolve to themselves. |
|---|
| 474 | (dolist (n '(0 ; nop |
|---|
| 475 | 1 ; aconst_null |
|---|
| 476 | 2 ; iconst_m1 |
|---|
| 477 | 3 ; iconst_0 |
|---|
| 478 | 4 ; iconst_1 |
|---|
| 479 | 5 ; iconst_2 |
|---|
| 480 | 6 ; iconst_3 |
|---|
| 481 | 7 ; iconst_4 |
|---|
| 482 | 8 ; iconst_5 |
|---|
| 483 | 9 ; lconst_0 |
|---|
| 484 | 10 ; lconst_1 |
|---|
| 485 | 11 ; fconst_0 |
|---|
| 486 | 12 ; fconst_1 |
|---|
| 487 | 13 ; fconst_2 |
|---|
| 488 | 14 ; dconst_0 |
|---|
| 489 | 15 ; dconst_1 |
|---|
| 490 | 42 ; aload_0 |
|---|
| 491 | 43 ; aload_1 |
|---|
| 492 | 44 ; aload_2 |
|---|
| 493 | 45 ; aload_3 |
|---|
| 494 | 46 ; iaload |
|---|
| 495 | 47 ; laload |
|---|
| 496 | 48 ; faload |
|---|
| 497 | 49 ; daload |
|---|
| 498 | 50 ; aaload |
|---|
| 499 | 75 ; astore_0 |
|---|
| 500 | 76 ; astore_1 |
|---|
| 501 | 77 ; astore_2 |
|---|
| 502 | 78 ; astore_3 |
|---|
| 503 | 79 ; iastore |
|---|
| 504 | 80 ; lastore |
|---|
| 505 | 81 ; fastore |
|---|
| 506 | 82 ; dastore |
|---|
| 507 | 83 ; aastore |
|---|
| 508 | 87 ; pop |
|---|
| 509 | 88 ; pop2 |
|---|
| 510 | 89 ; dup |
|---|
| 511 | 90 ; dup_x1 |
|---|
| 512 | 91 ; dup_x2 |
|---|
| 513 | 92 ; dup2 |
|---|
| 514 | 93 ; dup2_x1 |
|---|
| 515 | 94 ; dup2_x2 |
|---|
| 516 | 95 ; swap |
|---|
| 517 | 96 ; iadd |
|---|
| 518 | 97 ; ladd |
|---|
| 519 | 98 ; fadd |
|---|
| 520 | 99 ; dadd |
|---|
| 521 | 100 ; isub |
|---|
| 522 | 101 ; lsub |
|---|
| 523 | 102 ; fsub |
|---|
| 524 | 103 ; dsub |
|---|
| 525 | 104 ; imul |
|---|
| 526 | 105 ; lmul |
|---|
| 527 | 106 ; fmul |
|---|
| 528 | 107 ; dmul |
|---|
| 529 | 116 ; ineg |
|---|
| 530 | 117 ; lneg |
|---|
| 531 | 118 ; fneg |
|---|
| 532 | 119 ; dneg |
|---|
| 533 | 120 ; ishl |
|---|
| 534 | 121 ; lshl |
|---|
| 535 | 122 ; ishr |
|---|
| 536 | 123 ; lshr |
|---|
| 537 | 126 ; iand |
|---|
| 538 | 127 ; land |
|---|
| 539 | 128 ; ior |
|---|
| 540 | 129 ; lor |
|---|
| 541 | 130 ; ixor |
|---|
| 542 | 131 ; lxor |
|---|
| 543 | 133 ; i2l |
|---|
| 544 | 134 ; i2f |
|---|
| 545 | 135 ; i2d |
|---|
| 546 | 136 ; l2i |
|---|
| 547 | 137 ; l2f |
|---|
| 548 | 138 ; l2d |
|---|
| 549 | 141 ; f2d |
|---|
| 550 | 144 ; d2f |
|---|
| 551 | 148 ; lcmp |
|---|
| 552 | 149 ; fcmpd |
|---|
| 553 | 150 ; fcmpg |
|---|
| 554 | 151 ; dcmpd |
|---|
| 555 | 152 ; dcmpg |
|---|
| 556 | 153 ; ifeq |
|---|
| 557 | 154 ; ifne |
|---|
| 558 | 155 ; ifge |
|---|
| 559 | 156 ; ifgt |
|---|
| 560 | 157 ; ifgt |
|---|
| 561 | 158 ; ifle |
|---|
| 562 | 159 ; if_icmpeq |
|---|
| 563 | 160 ; if_icmpne |
|---|
| 564 | 161 ; if_icmplt |
|---|
| 565 | 162 ; if_icmpge |
|---|
| 566 | 163 ; if_icmpgt |
|---|
| 567 | 164 ; if_icmple |
|---|
| 568 | 165 ; if_acmpeq |
|---|
| 569 | 166 ; if_acmpne |
|---|
| 570 | 167 ; goto |
|---|
| 571 | 176 ; areturn |
|---|
| 572 | 177 ; return |
|---|
| 573 | 178 ; getstatic |
|---|
| 574 | 179 ; putstatic |
|---|
| 575 | 180 ; getfield |
|---|
| 576 | 181 ; putfield |
|---|
| 577 | 182 ; invokevirtual |
|---|
| 578 | 183 ; invockespecial |
|---|
| 579 | 184 ; invokestatic |
|---|
| 580 | 187 ; new |
|---|
| 581 | 189 ; anewarray |
|---|
| 582 | 190 ; arraylength |
|---|
| 583 | 191 ; athrow |
|---|
| 584 | 192 ; checkcast |
|---|
| 585 | 193 ; instanceof |
|---|
| 586 | 194 ; monitorenter |
|---|
| 587 | 195 ; monitorexit |
|---|
| 588 | 198 ; ifnull |
|---|
| 589 | 202 ; label |
|---|
| 590 | )) |
|---|
| 591 | (setf (gethash n ht) nil)))) |
|---|
| 592 | |
|---|
| 593 | (initialize-resolvers) |
|---|
| 594 | |
|---|
| 595 | (defmacro define-resolver (opcodes args &body body) |
|---|
| 596 | (let ((name (gensym))) |
|---|
| 597 | `(progn |
|---|
| 598 | (defun ,name ,args ,@body) |
|---|
| 599 | (eval-when (:load-toplevel :execute) |
|---|
| 600 | ,(if (listp opcodes) |
|---|
| 601 | `(dolist (op ',opcodes) |
|---|
| 602 | (setf (gethash op +resolvers+) |
|---|
| 603 | (symbol-function ',name))) |
|---|
| 604 | `(setf (gethash ,opcodes +resolvers+) |
|---|
| 605 | (symbol-function ',name))))))) |
|---|
| 606 | |
|---|
| 607 | (defun load/store-resolver (instruction inst-index inst-index2 error-text) |
|---|
| 608 | (let* ((args (instruction-args instruction)) |
|---|
| 609 | (index (car args))) |
|---|
| 610 | (declare (type (unsigned-byte 16) index)) |
|---|
| 611 | (cond ((<= 0 index 3) |
|---|
| 612 | (inst (+ index inst-index))) |
|---|
| 613 | ((<= 0 index 255) |
|---|
| 614 | (inst inst-index2 index)) |
|---|
| 615 | (t |
|---|
| 616 | (error error-text))))) |
|---|
| 617 | |
|---|
| 618 | ;; aload |
|---|
| 619 | (define-resolver 25 (instruction) |
|---|
| 620 | (load/store-resolver instruction 42 25 "ALOAD unsupported case")) |
|---|
| 621 | |
|---|
| 622 | ;; astore |
|---|
| 623 | (define-resolver 58 (instruction) |
|---|
| 624 | (load/store-resolver instruction 75 58 "ASTORE unsupported case")) |
|---|
| 625 | |
|---|
| 626 | ;; iload |
|---|
| 627 | (define-resolver 21 (instruction) |
|---|
| 628 | (load/store-resolver instruction 26 21 "ILOAD unsupported case")) |
|---|
| 629 | |
|---|
| 630 | ;; istore |
|---|
| 631 | (define-resolver 54 (instruction) |
|---|
| 632 | (load/store-resolver instruction 59 54 "ISTORE unsupported case")) |
|---|
| 633 | |
|---|
| 634 | ;; lload |
|---|
| 635 | (define-resolver 22 (instruction) |
|---|
| 636 | (load/store-resolver instruction 30 22 "LLOAD unsupported case")) |
|---|
| 637 | |
|---|
| 638 | ;; lstore |
|---|
| 639 | (define-resolver 55 (instruction) |
|---|
| 640 | (load/store-resolver instruction 63 55 "LSTORE unsupported case")) |
|---|
| 641 | |
|---|
| 642 | ;; bipush, sipush |
|---|
| 643 | (define-resolver (16 17) (instruction) |
|---|
| 644 | (let* ((args (instruction-args instruction)) |
|---|
| 645 | (n (first args))) |
|---|
| 646 | (declare (type fixnum n)) |
|---|
| 647 | (cond ((<= 0 n 5) |
|---|
| 648 | (inst (+ n 3))) |
|---|
| 649 | ((<= -128 n 127) |
|---|
| 650 | (inst 16 (logand n #xff))) ; BIPUSH |
|---|
| 651 | (t ; SIPUSH |
|---|
| 652 | (inst 17 (s2 n)))))) |
|---|
| 653 | |
|---|
| 654 | ;; ldc |
|---|
| 655 | (define-resolver 18 (instruction) |
|---|
| 656 | (let* ((args (instruction-args instruction))) |
|---|
| 657 | (unless (= (length args) 1) |
|---|
| 658 | (error "Wrong number of args for LDC.")) |
|---|
| 659 | (if (> (car args) 255) |
|---|
| 660 | (inst 19 (u2 (car args))) ; LDC_W |
|---|
| 661 | (inst 18 args)))) |
|---|
| 662 | |
|---|
| 663 | ;; ldc_w |
|---|
| 664 | (define-resolver 19 (instruction) |
|---|
| 665 | (let* ((args (instruction-args instruction))) |
|---|
| 666 | (unless (= (length args) 1) |
|---|
| 667 | (error "Wrong number of args for LDC_W.")) |
|---|
| 668 | (inst 19 (u2 (car args))))) |
|---|
| 669 | |
|---|
| 670 | ;; ldc2_w |
|---|
| 671 | (define-resolver 20 (instruction) |
|---|
| 672 | (let* ((args (instruction-args instruction))) |
|---|
| 673 | (unless (= (length args) 1) |
|---|
| 674 | (error "Wrong number of args for LDC2_W.")) |
|---|
| 675 | (inst 20 (u2 (car args))))) |
|---|
| 676 | |
|---|
| 677 | ;; iinc |
|---|
| 678 | (define-resolver 132 (instruction) |
|---|
| 679 | (let* ((args (instruction-args instruction)) |
|---|
| 680 | (register (first args)) |
|---|
| 681 | (n (second args))) |
|---|
| 682 | (when (not (<= -128 n 127)) |
|---|
| 683 | (error "IINC argument ~A out of bounds." n)) |
|---|
| 684 | (inst 132 (list register (s1 n))))) |
|---|
| 685 | |
|---|
| 686 | (defknown resolve-instruction (t) t) |
|---|
| 687 | (defun resolve-instruction (instruction) |
|---|
| 688 | (declare (optimize speed)) |
|---|
| 689 | (let ((resolver (gethash1 (instruction-opcode instruction) +resolvers+))) |
|---|
| 690 | (if resolver |
|---|
| 691 | (funcall resolver instruction) |
|---|
| 692 | instruction))) |
|---|
| 693 | |
|---|
| 694 | (defun resolve-instructions (code) |
|---|
| 695 | (let* ((len (length code)) |
|---|
| 696 | (vector (make-array len :fill-pointer 0 :adjustable t))) |
|---|
| 697 | (dotimes (index len vector) |
|---|
| 698 | (declare (type (unsigned-byte 16) index)) |
|---|
| 699 | (let ((instruction (aref code index))) |
|---|
| 700 | (vector-push-extend (resolve-instruction instruction) vector))))) |
|---|
| 701 | |
|---|
| 702 | |
|---|
| 703 | |
|---|
| 704 | ;; BYTE CODE ANALYSIS AND OPTIMIZATION |
|---|
| 705 | |
|---|
| 706 | (declaim (ftype (function (t t t) t) analyze-stack-path)) |
|---|
| 707 | (defun analyze-stack-path (code start-index depth) |
|---|
| 708 | (declare (optimize speed)) |
|---|
| 709 | (declare (type fixnum start-index depth)) |
|---|
| 710 | (do* ((i start-index (1+ i)) |
|---|
| 711 | (limit (length code))) |
|---|
| 712 | ((>= i limit)) |
|---|
| 713 | (declare (type fixnum i limit)) |
|---|
| 714 | (let* ((instruction (aref code i)) |
|---|
| 715 | (instruction-depth (instruction-depth instruction)) |
|---|
| 716 | (instruction-stack (instruction-stack instruction))) |
|---|
| 717 | (declare (type fixnum instruction-stack)) |
|---|
| 718 | (when instruction-depth |
|---|
| 719 | (unless (= (the fixnum instruction-depth) |
|---|
| 720 | (the fixnum (+ depth instruction-stack))) |
|---|
| 721 | (internal-compiler-error "Stack inconsistency detected ~ |
|---|
| 722 | in ~A at index ~D: ~ |
|---|
| 723 | found ~S, expected ~S." |
|---|
| 724 | (compiland-name *current-compiland*) |
|---|
| 725 | i instruction-depth |
|---|
| 726 | (+ depth instruction-stack))) |
|---|
| 727 | (return-from analyze-stack-path)) |
|---|
| 728 | (let ((opcode (instruction-opcode instruction))) |
|---|
| 729 | (setf depth (+ depth instruction-stack)) |
|---|
| 730 | (setf (instruction-depth instruction) depth) |
|---|
| 731 | (unless (<= 0 depth) |
|---|
| 732 | (internal-compiler-error "Stack inconsistency detected ~ |
|---|
| 733 | in ~A at index ~D: ~ |
|---|
| 734 | negative depth ~S." |
|---|
| 735 | (compiland-name *current-compiland*) |
|---|
| 736 | i depth)) |
|---|
| 737 | (when (branch-p opcode) |
|---|
| 738 | (let ((label (car (instruction-args instruction)))) |
|---|
| 739 | (declare (type symbol label)) |
|---|
| 740 | (analyze-stack-path code (symbol-value label) depth))) |
|---|
| 741 | (when (unconditional-control-transfer-p opcode) |
|---|
| 742 | ;; Current path ends. |
|---|
| 743 | (return-from analyze-stack-path)))))) |
|---|
| 744 | |
|---|
| 745 | (declaim (ftype (function (t) t) analyze-stack)) |
|---|
| 746 | (defun analyze-stack (code exception-entry-points) |
|---|
| 747 | (declare (optimize speed)) |
|---|
| 748 | (let* ((code-length (length code))) |
|---|
| 749 | (declare (type vector code)) |
|---|
| 750 | (dotimes (i code-length) |
|---|
| 751 | (let* ((instruction (aref code i)) |
|---|
| 752 | (opcode (instruction-opcode instruction))) |
|---|
| 753 | (when (eql opcode 202) ; LABEL |
|---|
| 754 | (let ((label (car (instruction-args instruction)))) |
|---|
| 755 | (set label i))) |
|---|
| 756 | (if (instruction-stack instruction) |
|---|
| 757 | (when (opcode-stack-effect opcode) |
|---|
| 758 | (unless (eql (instruction-stack instruction) |
|---|
| 759 | (opcode-stack-effect opcode)) |
|---|
| 760 | (sys::%format t "instruction-stack = ~S ~ |
|---|
| 761 | opcode-stack-effect = ~S~%" |
|---|
| 762 | (instruction-stack instruction) |
|---|
| 763 | (opcode-stack-effect opcode)) |
|---|
| 764 | (sys::%format t "index = ~D instruction = ~A~%" i |
|---|
| 765 | (print-instruction instruction)))) |
|---|
| 766 | (setf (instruction-stack instruction) |
|---|
| 767 | (opcode-stack-effect opcode))) |
|---|
| 768 | (unless (instruction-stack instruction) |
|---|
| 769 | (sys::%format t "no stack information for instruction ~D~%" |
|---|
| 770 | (instruction-opcode instruction)) |
|---|
| 771 | (aver nil)))) |
|---|
| 772 | (analyze-stack-path code 0 0) |
|---|
| 773 | (dolist (entry-point exception-entry-points) |
|---|
| 774 | ;; Stack depth is always 1 when handler is called. |
|---|
| 775 | (analyze-stack-path code (symbol-value entry-point) 1)) |
|---|
| 776 | (let ((max-stack 0)) |
|---|
| 777 | (declare (type fixnum max-stack)) |
|---|
| 778 | (dotimes (i code-length) |
|---|
| 779 | (let* ((instruction (aref code i)) |
|---|
| 780 | (instruction-depth (instruction-depth instruction))) |
|---|
| 781 | (when instruction-depth |
|---|
| 782 | (setf max-stack (max max-stack (the fixnum instruction-depth)))))) |
|---|
| 783 | max-stack))) |
|---|
| 784 | |
|---|
| 785 | (defun analyze-locals (code) |
|---|
| 786 | (let ((code-length (length code)) |
|---|
| 787 | (max-local 0)) |
|---|
| 788 | (dotimes (i code-length max-local) |
|---|
| 789 | (let* ((instruction (aref code i)) |
|---|
| 790 | (opcode (instruction-opcode instruction))) |
|---|
| 791 | (setf max-local |
|---|
| 792 | (max max-local |
|---|
| 793 | (or (let ((opcode-register |
|---|
| 794 | (jvm-opcode-register-used opcode))) |
|---|
| 795 | (if (eq t opcode-register) |
|---|
| 796 | (car (instruction-args instruction)) |
|---|
| 797 | opcode-register)) |
|---|
| 798 | 0))))))) |
|---|
| 799 | |
|---|
| 800 | (defun delete-unused-labels (code handler-labels) |
|---|
| 801 | (declare (optimize speed)) |
|---|
| 802 | (let ((code (coerce code 'vector)) |
|---|
| 803 | (changed nil) |
|---|
| 804 | (marker (gensym))) |
|---|
| 805 | ;; Mark the labels that are actually branched to. |
|---|
| 806 | (dotimes (i (length code)) |
|---|
| 807 | (let ((instruction (aref code i))) |
|---|
| 808 | (when (branch-p (instruction-opcode instruction)) |
|---|
| 809 | (let ((label (car (instruction-args instruction)))) |
|---|
| 810 | (set label marker))))) |
|---|
| 811 | ;; Add labels used for exception handlers. |
|---|
| 812 | (dolist (label handler-labels) |
|---|
| 813 | (set label marker)) |
|---|
| 814 | ;; Remove labels that are not used as branch targets. |
|---|
| 815 | (dotimes (i (length code)) |
|---|
| 816 | (let ((instruction (aref code i))) |
|---|
| 817 | (when (= (instruction-opcode instruction) 202) ; LABEL |
|---|
| 818 | (let ((label (car (instruction-args instruction)))) |
|---|
| 819 | (declare (type symbol label)) |
|---|
| 820 | (unless (eq (symbol-value label) marker) |
|---|
| 821 | (setf (aref code i) nil) |
|---|
| 822 | (setf changed t)))))) |
|---|
| 823 | (values (if changed (delete nil code) code) |
|---|
| 824 | changed))) |
|---|
| 825 | |
|---|
| 826 | (defun delete-unreachable-code (code) |
|---|
| 827 | ;; Look for unreachable code after GOTO. |
|---|
| 828 | (declare (optimize speed)) |
|---|
| 829 | (let* ((code (coerce code 'vector)) |
|---|
| 830 | (changed nil) |
|---|
| 831 | (after-goto/areturn nil)) |
|---|
| 832 | (dotimes (i (length code)) |
|---|
| 833 | (declare (type (unsigned-byte 16) i)) |
|---|
| 834 | (let* ((instruction (aref code i)) |
|---|
| 835 | (opcode (instruction-opcode instruction))) |
|---|
| 836 | (cond (after-goto/areturn |
|---|
| 837 | (if (= opcode 202) ; LABEL |
|---|
| 838 | (setf after-goto/areturn nil) |
|---|
| 839 | ;; Unreachable. |
|---|
| 840 | (progn |
|---|
| 841 | (setf (aref code i) nil) |
|---|
| 842 | (setf changed t)))) |
|---|
| 843 | ((unconditional-control-transfer-p opcode) |
|---|
| 844 | (setf after-goto/areturn t))))) |
|---|
| 845 | (values (if changed (delete nil code) code) |
|---|
| 846 | changed))) |
|---|
| 847 | |
|---|
| 848 | |
|---|
| 849 | (declaim (ftype (function (t) label-target-instructions) hash-labels)) |
|---|
| 850 | (defun label-target-instructions (code) |
|---|
| 851 | (let ((ht (make-hash-table :test 'eq)) |
|---|
| 852 | (code (coerce code 'vector)) |
|---|
| 853 | (pending-labels '())) |
|---|
| 854 | (dotimes (i (length code)) |
|---|
| 855 | (let ((instruction (aref code i))) |
|---|
| 856 | (cond ((label-p instruction) |
|---|
| 857 | (push (instruction-label instruction) pending-labels)) |
|---|
| 858 | (t |
|---|
| 859 | ;; Not a label. |
|---|
| 860 | (when pending-labels |
|---|
| 861 | (dolist (label pending-labels) |
|---|
| 862 | (setf (gethash label ht) instruction)) |
|---|
| 863 | (setf pending-labels nil)))))) |
|---|
| 864 | ht)) |
|---|
| 865 | |
|---|
| 866 | (defun optimize-jumps (code) |
|---|
| 867 | (declare (optimize speed)) |
|---|
| 868 | (let* ((code (coerce code 'vector)) |
|---|
| 869 | (ht (label-target-instructions code)) |
|---|
| 870 | (changed nil)) |
|---|
| 871 | (dotimes (i (length code)) |
|---|
| 872 | (let* ((instruction (aref code i)) |
|---|
| 873 | (opcode (and instruction (instruction-opcode instruction)))) |
|---|
| 874 | (when (and opcode (branch-p opcode)) |
|---|
| 875 | (let* ((target-label (car (instruction-args instruction))) |
|---|
| 876 | (next-instruction (gethash1 target-label ht))) |
|---|
| 877 | (when next-instruction |
|---|
| 878 | (case (instruction-opcode next-instruction) |
|---|
| 879 | ((167 200) ;; GOTO |
|---|
| 880 | (setf (instruction-args instruction) |
|---|
| 881 | (instruction-args next-instruction) |
|---|
| 882 | changed t)) |
|---|
| 883 | (176 ; ARETURN |
|---|
| 884 | (when (unconditional-control-transfer-p opcode) |
|---|
| 885 | (setf (instruction-opcode instruction) 176 |
|---|
| 886 | (instruction-args instruction) nil |
|---|
| 887 | changed t))))))))) |
|---|
| 888 | (values code changed))) |
|---|
| 889 | |
|---|
| 890 | |
|---|
| 891 | (defun optimize-instruction-sequences (code) |
|---|
| 892 | (let* ((code (coerce code 'vector)) |
|---|
| 893 | (changed nil)) |
|---|
| 894 | (dotimes (i (1- (length code))) |
|---|
| 895 | (let* ((this-instruction (aref code i)) |
|---|
| 896 | (this-opcode (and this-instruction |
|---|
| 897 | (instruction-opcode this-instruction))) |
|---|
| 898 | (labels-skipped-p nil) |
|---|
| 899 | (next-instruction (do ((j (1+ i) (1+ j))) |
|---|
| 900 | ((or (>= j (length code)) |
|---|
| 901 | (/= 202 ; LABEL |
|---|
| 902 | (instruction-opcode (aref code j)))) |
|---|
| 903 | (when (< j (length code)) |
|---|
| 904 | (aref code j))) |
|---|
| 905 | (setf labels-skipped-p t))) |
|---|
| 906 | (next-opcode (and next-instruction |
|---|
| 907 | (instruction-opcode next-instruction)))) |
|---|
| 908 | (case this-opcode |
|---|
| 909 | (205 ; CLEAR-VALUES |
|---|
| 910 | (when (eql next-opcode 205) ; CLEAR-VALUES |
|---|
| 911 | (setf (aref code i) nil) |
|---|
| 912 | (setf changed t))) |
|---|
| 913 | (178 ; GETSTATIC |
|---|
| 914 | (when (and (eql next-opcode 87) ; POP |
|---|
| 915 | (not labels-skipped-p)) |
|---|
| 916 | (setf (aref code i) nil) |
|---|
| 917 | (setf (aref code (1+ i)) nil) |
|---|
| 918 | (setf changed t))) |
|---|
| 919 | (176 ; ARETURN |
|---|
| 920 | (when (eql next-opcode 176) ; ARETURN |
|---|
| 921 | (setf (aref code i) nil) |
|---|
| 922 | (setf changed t))) |
|---|
| 923 | ((200 167) ; GOTO GOTO_W |
|---|
| 924 | (when (and (or (eql next-opcode 202) ; LABEL |
|---|
| 925 | (eql next-opcode 200) ; GOTO_W |
|---|
| 926 | (eql next-opcode 167)) ; GOTO |
|---|
| 927 | (eq (car (instruction-args this-instruction)) |
|---|
| 928 | (car (instruction-args next-instruction)))) |
|---|
| 929 | (setf (aref code i) nil) |
|---|
| 930 | (setf changed t)))))) |
|---|
| 931 | (values (if changed (delete nil code) code) |
|---|
| 932 | changed))) |
|---|
| 933 | |
|---|
| 934 | (defvar *enable-optimization* t) |
|---|
| 935 | |
|---|
| 936 | (defknown optimize-code (t t) t) |
|---|
| 937 | (defun optimize-code (code handler-labels) |
|---|
| 938 | (unless *enable-optimization* |
|---|
| 939 | (format t "optimizations are disabled~%")) |
|---|
| 940 | (when *enable-optimization* |
|---|
| 941 | (when *compiler-debug* |
|---|
| 942 | (format t "----- before optimization -----~%") |
|---|
| 943 | (print-code code)) |
|---|
| 944 | (loop |
|---|
| 945 | (let ((changed-p nil)) |
|---|
| 946 | (multiple-value-setq |
|---|
| 947 | (code changed-p) |
|---|
| 948 | (delete-unused-labels code handler-labels)) |
|---|
| 949 | (if changed-p |
|---|
| 950 | (setf code (optimize-instruction-sequences code)) |
|---|
| 951 | (multiple-value-setq |
|---|
| 952 | (code changed-p) |
|---|
| 953 | (optimize-instruction-sequences code))) |
|---|
| 954 | (if changed-p |
|---|
| 955 | (setf code (optimize-jumps code)) |
|---|
| 956 | (multiple-value-setq |
|---|
| 957 | (code changed-p) |
|---|
| 958 | (optimize-jumps code))) |
|---|
| 959 | (if changed-p |
|---|
| 960 | (setf code (delete-unreachable-code code)) |
|---|
| 961 | (multiple-value-setq |
|---|
| 962 | (code changed-p) |
|---|
| 963 | (delete-unreachable-code code))) |
|---|
| 964 | (unless changed-p |
|---|
| 965 | (return)))) |
|---|
| 966 | (unless (vectorp code) |
|---|
| 967 | (setf code (coerce code 'vector))) |
|---|
| 968 | (when *compiler-debug* |
|---|
| 969 | (sys::%format t "----- after optimization -----~%") |
|---|
| 970 | (print-code code))) |
|---|
| 971 | code) |
|---|
| 972 | |
|---|
| 973 | |
|---|
| 974 | |
|---|
| 975 | |
|---|
| 976 | (defun code-bytes (code) |
|---|
| 977 | (let ((length 0) |
|---|
| 978 | labels ;; alist |
|---|
| 979 | ) |
|---|
| 980 | (declare (type (unsigned-byte 16) length)) |
|---|
| 981 | ;; Pass 1: calculate label offsets and overall length. |
|---|
| 982 | (dotimes (i (length code)) |
|---|
| 983 | (declare (type (unsigned-byte 16) i)) |
|---|
| 984 | (let* ((instruction (aref code i)) |
|---|
| 985 | (opcode (instruction-opcode instruction))) |
|---|
| 986 | (if (= opcode 202) ; LABEL |
|---|
| 987 | (let ((label (car (instruction-args instruction)))) |
|---|
| 988 | (set label length) |
|---|
| 989 | (setf labels |
|---|
| 990 | (acons label length labels))) |
|---|
| 991 | (incf length (opcode-size opcode))))) |
|---|
| 992 | ;; Pass 2: replace labels with calculated offsets. |
|---|
| 993 | (let ((index 0)) |
|---|
| 994 | (declare (type (unsigned-byte 16) index)) |
|---|
| 995 | (dotimes (i (length code)) |
|---|
| 996 | (declare (type (unsigned-byte 16) i)) |
|---|
| 997 | (let ((instruction (aref code i))) |
|---|
| 998 | (when (branch-p (instruction-opcode instruction)) |
|---|
| 999 | (let* ((label (car (instruction-args instruction))) |
|---|
| 1000 | (offset (- (the (unsigned-byte 16) |
|---|
| 1001 | (symbol-value (the symbol label))) |
|---|
| 1002 | index))) |
|---|
| 1003 | (setf (instruction-args instruction) (s2 offset)))) |
|---|
| 1004 | (unless (= (instruction-opcode instruction) 202) ; LABEL |
|---|
| 1005 | (incf index (opcode-size (instruction-opcode instruction))))))) |
|---|
| 1006 | ;; Expand instructions into bytes, skipping LABEL pseudo-instructions. |
|---|
| 1007 | (let ((bytes (make-array length)) |
|---|
| 1008 | (index 0)) |
|---|
| 1009 | (declare (type (unsigned-byte 16) index)) |
|---|
| 1010 | (dotimes (i (length code)) |
|---|
| 1011 | (declare (type (unsigned-byte 16) i)) |
|---|
| 1012 | (let ((instruction (aref code i))) |
|---|
| 1013 | (unless (= (instruction-opcode instruction) 202) ; LABEL |
|---|
| 1014 | (setf (svref bytes index) (instruction-opcode instruction)) |
|---|
| 1015 | (incf index) |
|---|
| 1016 | (dolist (byte (instruction-args instruction)) |
|---|
| 1017 | (setf (svref bytes index) byte) |
|---|
| 1018 | (incf index))))) |
|---|
| 1019 | (values bytes labels)))) |
|---|
| 1020 | |
|---|
| 1021 | (defun finalize-code (code handler-labels optimize) |
|---|
| 1022 | (setf code (coerce (nreverse code) 'vector)) |
|---|
| 1023 | (when optimize |
|---|
| 1024 | (setf code (optimize-code code handler-labels))) |
|---|
| 1025 | (resolve-instructions (expand-virtual-instructions code))) |
|---|
| 1026 | |
|---|
| 1027 | (provide '#:opcodes) |
|---|
