sourcepawn2: jitcraft/Opcodes.cpp@0784ac5cc347

     1 /*

     2  * Copyright (C) 2012 David Anderson

     3  *

     4  * This file is part of JITCraft.

     5  *

     6  * JITCraft is free software: you can redistribute it and/or modify it under

     7  * the terms of the GNU General Public License as published by the Free

     8  * Software Foundation, either version 3 of the License, or (at your option)

     9  * any later version.

    10  *

    11  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY

    12  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

    13  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License along with

    16  * JITCraft. If not, see http://www.gnu.org/licenses/.

    17  */

    18 #include "Opcodes.h"

    19 #include "Utility.h"

    20 #include "Code.h"

    21 #include "Zone.h"

    22 #include "Array.h"

    23 #include "Heap-inl.h"

    25 using namespace jc;

    27 OpInfo jc::OpcodeInfo[] =

    28 {

    29 #define OPDEF(name, number, text, length, uses, defs) \

    30     {text, length, uses, defs},

    31 #include "Opcodes.tbl"

    32 #undef OPDEF

    33 };

    35 Code *

    36 Code::New(Zone *zone, ByteArray *bytecode, FixedArray *locals, FixedArray *args,

    37           FixedArray *maps, unsigned maxStackDepth, Module *module)

    38 {

    39     Object *obj = zone->allocate(MapKind_Code, sizeof(Code), Heap::Tenure_Old);

    40     if (!obj)

    41         return NULL;

    43     Code *code = Code::cast(obj);

    44     code->bytecode_ = bytecode;

    45     code->locals_ = locals;

    46     code->args_ = args;

    47     code->maps_ = maps;

    48     code->maxStackDepth_ = maxStackDepth;

    49     code->module_ = module;

    50     return code;

    51 }

    53 // All jumps must be the same length.

    54 STATIC_ASSERT(OP_JL_LENGTH == OP_JUMP_LENGTH);

    55 STATIC_ASSERT(OP_JLE_LENGTH == OP_JUMP_LENGTH);

    56 STATIC_ASSERT(OP_JG_LENGTH == OP_JUMP_LENGTH);

    57 STATIC_ASSERT(OP_JGE_LENGTH == OP_JUMP_LENGTH);

    58 STATIC_ASSERT(OP_JEQ_LENGTH == OP_JUMP_LENGTH);

    59 STATIC_ASSERT(OP_JNE_LENGTH == OP_JUMP_LENGTH);

    60 STATIC_ASSERT(OP_JT_LENGTH == OP_JUMP_LENGTH);

    61 STATIC_ASSERT(OP_JF_LENGTH == OP_JUMP_LENGTH);

    63 void

    64 jc::Disassemble(Code *code, FILE *fp)

    65 {

    66     bytecode *pc = code->start();

    67     for (;;) {

    68         Opcode op = Opcode(*pc);

    70         fprintf(fp, "%-4d %s ", int(pc - code->start()), OpcodeInfo[op].name);

    72         switch (op) {

    73           case OP_NOP:

    74           case OP_RETURN:

    75           case OP_ADD:

    76           case OP_SUB:

    77           case OP_MUL:

    78           case OP_DIV:

    79           case OP_ADD_F:

    80           case OP_SUB_F:

    81           case OP_MUL_F:

    82           case OP_DIV_F:

    83           case OP_CVT_I2F:

    84           case OP_POP:

    85           case OP_GETARRAY_I:

    86           case OP_SETARRAY_I:

    87           case OP_GETARRAY_F:

    88           case OP_SETARRAY_F:

    89           case OP_GETARRAY_P:

    90           case OP_BOUNDS_STA:

    91           case OP_SHL:

    92           case OP_SHR:

    93           case OP_USHR:

    94           case OP_BITAND:

    95           case OP_BITOR:

    96           case OP_BITXOR:

    97           case OP_GETREF_I:

    98           case OP_SETREF_I:

    99           case OP_GETREF_F:

   100           case OP_SETREF_F:

   101             break;

   103           case OP_STOP:

   104             fprintf(fp, "\n");

   105             return;

   107           case OP_INT:

   108             fprintf(fp, "%d", READ_INT32(pc));

   109             break;

   111           case OP_FLOAT:

   112             fprintf(fp, "%f", READ_FLOAT(pc));

   113             break;

   115           case OP_JL:

   116           case OP_JLE:

   117           case OP_JG:

   118           case OP_JGE:

   119           case OP_JEQ:

   120           case OP_JNE:

   121           case OP_JT:

   122           case OP_JF:

   123           case OP_JUMP:

   124             fprintf(fp, "%u (%+d)", unsigned((pc + READ_INT32(pc)) - code->start()), READ_INT32(pc));

   125             break;

   127           case OP_LIFOARRAY:

   128           {

   129             // :TODO: use Local

   130             ArrayMap *map = ArrayMap::cast(code->map(READ_UINT32(pc)));

   131             fprintf(fp, "%s:", map->type()->innermost()->tag()

   132                                ? map->type()->innermost()->tag()

   133                                : "_");

   134             for (; map; map = map->contained()) {

   135                 Type *type = map->type();

   136                 fprintf(fp, "[%d]", type->elements());

   137             }

   138             break;

   139           }

   141           case OP_GETLOCAL:

   142           case OP_SETLOCAL:

   143           case OP_GETARG:

   144           case OP_SETARG:

   145           case OP_SAVELIFO:

   146           case OP_UNWINDLIFO:

   147           case OP_CALLGLOBAL:

   148           case OP_VARREF_LIFO:

   149           case OP_ARGREF_LIFO:

   150             fprintf(fp, "%u", READ_UINT32(pc));

   151             break;

   153           default:

   154             // Unknown opcode!

   155             assert(false);

   156             return;

   157         }

   159         fprintf(fp, "\n");

   160         pc += OpcodeInfo[op].length;

   161         assert(pc < code->start() + code->length());

   162     }

   163 }

author	David Anderson <dvander@alliedmods.net>
	Sat Jun 30 22:31:14 2012 -0700 (2012-06-30)
changeset 14	0784ac5cc347
parent 13	627b6b94e774
child 16	23627f8bc421
permissions	-rw-r--r--