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First implementation of the disassembler
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azertyfun
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Mar 20, 2016
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src/tk/azertyfun/dcputoolchain/disassembler/Disassembler.java
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| @@ -0,0 +1,217 @@ | ||
| package tk.azertyfun.dcputoolchain.disassembler; | ||
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| import java.util.HashMap; | ||
| import java.util.LinkedHashMap; | ||
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| public class Disassembler { | ||
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| public static HashMap<Character, String> opcodes = new HashMap<>(); | ||
| static { | ||
| opcodes.put((char) 0x01, "SET"); | ||
| opcodes.put((char) 0x02, "ADD"); | ||
| opcodes.put((char) 0x03, "SUB"); | ||
| opcodes.put((char) 0x04, "MUL"); | ||
| opcodes.put((char) 0x05, "MLI"); | ||
| opcodes.put((char) 0x06, "DIV"); | ||
| opcodes.put((char) 0x07, "DVI"); | ||
| opcodes.put((char) 0x08, "MOD"); | ||
| opcodes.put((char) 0x09, "MDI"); | ||
| opcodes.put((char) 0x0a, "AND"); | ||
| opcodes.put((char) 0x0b, "BOR"); | ||
| opcodes.put((char) 0x0c, "XOR"); | ||
| opcodes.put((char) 0x0d, "SHR"); | ||
| opcodes.put((char) 0x0e, "ASR"); | ||
| opcodes.put((char) 0x0f, "SHL"); | ||
| opcodes.put((char) 0x10, "IFB"); | ||
| opcodes.put((char) 0x11, "IFC"); | ||
| opcodes.put((char) 0x12, "IFE"); | ||
| opcodes.put((char) 0x13, "IFN"); | ||
| opcodes.put((char) 0x14, "IFG"); | ||
| opcodes.put((char) 0x15, "IFA"); | ||
| opcodes.put((char) 0x16, "IFL"); | ||
| opcodes.put((char) 0x17, "IFU"); | ||
| opcodes.put((char) 0x18, "0x0018"); | ||
| opcodes.put((char) 0x19, "0x0019"); | ||
| opcodes.put((char) 0x1a, "ADX"); | ||
| opcodes.put((char) 0x1b, "SBX"); | ||
| opcodes.put((char) 0x1c, "0x001c"); | ||
| opcodes.put((char) 0x1d, "0x001d"); | ||
| opcodes.put((char) 0x1e, "STI"); | ||
| opcodes.put((char) 0x1f, "STD"); | ||
| } | ||
| public static HashMap<Character, String> specialOpcodes = new HashMap<>(); | ||
| static { | ||
| specialOpcodes.put((char) 0x00, "0x0000"); | ||
| specialOpcodes.put((char) 0x01, "JSR"); | ||
| specialOpcodes.put((char) 0x02, "0x0002"); | ||
| specialOpcodes.put((char) 0x03, "0x0003"); | ||
| specialOpcodes.put((char) 0x04, "0x0004"); | ||
| specialOpcodes.put((char) 0x05, "0x0005"); | ||
| specialOpcodes.put((char) 0x06, "0x0006"); | ||
| specialOpcodes.put((char) 0x07, "0x0007"); | ||
| specialOpcodes.put((char) 0x08, "INT"); | ||
| specialOpcodes.put((char) 0x09, "IAG"); | ||
| specialOpcodes.put((char) 0x0a, "IAS"); | ||
| specialOpcodes.put((char) 0x0b, "RFI"); | ||
| specialOpcodes.put((char) 0x0c, "IAQ"); | ||
| specialOpcodes.put((char) 0x0d, "0x000d"); | ||
| specialOpcodes.put((char) 0x0e, "0x000e"); | ||
| specialOpcodes.put((char) 0x0f, "0x000f"); | ||
| specialOpcodes.put((char) 0x10, "HWN"); | ||
| specialOpcodes.put((char) 0x11, "HWQ"); | ||
| specialOpcodes.put((char) 0x12, "HWI"); | ||
| specialOpcodes.put((char) 0x13, "LOG"); | ||
| specialOpcodes.put((char) 0x14, "BRK"); | ||
| specialOpcodes.put((char) 0x15, "0x0015"); | ||
| specialOpcodes.put((char) 0x16, "0x0016"); | ||
| specialOpcodes.put((char) 0x17, "0x0017"); | ||
| specialOpcodes.put((char) 0x18, "0x0018"); | ||
| specialOpcodes.put((char) 0x19, "0x0019"); | ||
| specialOpcodes.put((char) 0x1a, "0x001a"); | ||
| specialOpcodes.put((char) 0x1b, "0x001b"); | ||
| specialOpcodes.put((char) 0x1c, "0x001c"); | ||
| specialOpcodes.put((char) 0x1d, "0x001d"); | ||
| specialOpcodes.put((char) 0x1e, "0x001e"); | ||
| specialOpcodes.put((char) 0x1f, "0x001f"); | ||
| } | ||
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| private char[] ram; | ||
| private char offset; | ||
| private char pc = 0; | ||
| private char wordToHighlight; | ||
| private boolean wordHighlit = false; | ||
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| public Disassembler(char[] ram, char wordToHighlight, char offset) { | ||
| this.ram = ram; | ||
| this.offset = offset; | ||
| this.wordToHighlight = wordToHighlight; | ||
| } | ||
|
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| public LinkedHashMap<String, Boolean> disassemble() { | ||
| LinkedHashMap<String, Boolean> instructions = new LinkedHashMap<>(); | ||
|
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| while(pc < ram.length) { | ||
| String instruction = ""; | ||
| char currentInstruction = pc; | ||
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| instruction += "0x" + String.format("%04x", (int) (currentInstruction + offset)) + ": "; | ||
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| char word = ram[pc++]; | ||
| char opcode = (char) (word & 0b11111); | ||
| char a = (char) ((word >> 10) & 0b111111); | ||
| char b = (char) ((word >> 5) & 0b11111); | ||
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| if(opcode == 0) { //Special opcode | ||
| opcode = b; | ||
| instruction += specialOpcodes.get(opcode); | ||
| instruction += " " + get(a, true); | ||
| } else { | ||
| instruction += opcodes.get(opcode); | ||
| instruction += " " + get(b, false) + ", " + get(a, true); | ||
| } | ||
|
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| boolean highlight = false; | ||
| if(currentInstruction + offset >= wordToHighlight && !wordHighlit) { | ||
| highlight = true; | ||
| wordHighlit = true; | ||
| } | ||
|
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| instructions.put(instruction, highlight); | ||
| } | ||
|
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| return instructions; | ||
| } | ||
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| public String get(char a, boolean isA) { | ||
| if(a <= 0x07) { | ||
| switch (a) { | ||
| case 0: | ||
| return "A"; | ||
| case 1: | ||
| return "B"; | ||
| case 2: | ||
| return "C"; | ||
| case 3: | ||
| return "X"; | ||
| case 4: | ||
| return "Y"; | ||
| case 5: | ||
| return "Z"; | ||
| case 6: | ||
| return "I"; | ||
| case 7: | ||
| return "J"; | ||
| default: | ||
| return "0x" + String.format("%04x", (int) a); | ||
| } | ||
| } else if(a <= 0x0F) { | ||
| switch (a - 0x08) { | ||
| case 0: | ||
| return "[A]"; | ||
| case 1: | ||
| return "[B]"; | ||
| case 2: | ||
| return "[C]"; | ||
| case 3: | ||
| return "[X]"; | ||
| case 4: | ||
| return "[Y]"; | ||
| case 5: | ||
| return "[Z]"; | ||
| case 6: | ||
| return "[I]"; | ||
| case 7: | ||
| return "[J]"; | ||
| default: | ||
| return "0x" + String.format("%04x", (int) a); | ||
| } | ||
| } else if(a <= 0x17) { | ||
| switch (a - 0x10) { | ||
| case 0: | ||
| return "[A + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 1: | ||
| return "[B + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 2: | ||
| return "[C + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 3: | ||
| return "[X + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 4: | ||
| return "[Y + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 5: | ||
| return "[Z + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 6: | ||
| return "[I + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| case 7: | ||
| return "[J + 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| default: | ||
| return String.format("%04x", (int) a); | ||
| } | ||
| } else if(a == 0x18) { | ||
| if(isA) | ||
| return "POP"; | ||
| else | ||
| return "PUSH"; | ||
| } else if(a == 0x19) { | ||
| return "PEEK"; | ||
| } else if(a == 0x1A) { | ||
| return "PICK 0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????"); | ||
| } else if(a == 0x1B) { | ||
| return "SP"; | ||
| } else if(a == 0x1C) { | ||
| return "PC"; | ||
| } else if(a == 0x1D) { | ||
| return "EX"; | ||
| } else if(a == 0x1E) { | ||
| return "[0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????") + "]"; | ||
| } else if(a == 0x1F) { | ||
| return "0x" + ((pc < ram.length) ? String.format("%04x", (int) ram[pc++]) : "0x????"); | ||
| } else if(a <= 0x3F) { | ||
| if(a == 0x20) | ||
| return "0xffff"; | ||
| else | ||
| return "0x" + String.format("%04x", a - 0x21); | ||
| } else { | ||
| return "0x" + String.format("%04x", (int) a); | ||
| } | ||
| } | ||
| } |
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