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Update ScriptDecode.java
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@bigianb
bigianb committed Apr 30, 2019
1 parent 68bbdad commit e68d9cc
Showing 1 changed file with 56 additions and 13 deletions.
69 changes: 56 additions & 13 deletions bgtools/src/net/ijbrown/bgtools/lmp/ScriptDecode.java
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,7 @@ private String disassemble(File outDirFile)
sb.append("address 6: ").append(HexUtil.formatHex(hw2)).append("\r\n");
sb.append("address 8: ").append(HexUtil.formatHex(hw3)).append("\r\n");
sb.append("address A: ").append(HexUtil.formatHex(hw4)).append("\r\n");
sb.append("address C (inst table): ").append(HexUtil.formatHex(instructionsOffset)).append("\r\n");
sb.append("address 10 (string table): ").append(HexUtil.formatHex(stringsOffset)).append("\r\n");
sb.append("address 14: ").append(HexUtil.formatHex(offset3)).append("\r\n");
sb.append("address 18: ").append(HexUtil.formatHex(offset4)).append("\r\n");
Expand Down Expand Up @@ -191,6 +192,7 @@ private void dumpInstructions(StringBuilder sb, int instructionsOffset, int len)
if (bytesConsumed >= 0) {
i += bytesConsumed;
} else {
System.out.println("Unknown opcode " + HexUtil.formatHex(opcode));
sb.append(HexUtil.formatHex(opcode));
if (opcode < opCodeArgs.length && opcode >= 0) {
ARGS_TYPE type = opCodeArgs[opcode];
Expand Down Expand Up @@ -260,6 +262,12 @@ private int disassembleInstruction(StringBuilder sb, int opcode, int i, int inst
{
int bytesConsumed = -1;
switch (opcode) {
case 0x1: {
bytesConsumed = 4;
int arg1 = DataUtil.getLEInt(fileData, instructionsOffset + i + bytesConsumed + bodyOffset);
sb.append("acc = var ").append(arg1);
}
break;
case 0xb: {
bytesConsumed = 4;
int arg1 = DataUtil.getLEInt(fileData, instructionsOffset + i + bytesConsumed + bodyOffset);
Expand All @@ -272,6 +280,12 @@ private int disassembleInstruction(StringBuilder sb, int opcode, int i, int inst
sb.append("var ").append(arg1).append(" = acc");
}
break;
case 0x11: {
bytesConsumed = 4;
int arg1 = DataUtil.getLEInt(fileData, instructionsOffset + i + bytesConsumed + bodyOffset);
sb.append("t4 var ").append(arg1).append(" = acc");
}
break;
case 0x27: {
// pushes a number onto the stack
bytesConsumed = 4;
Expand Down Expand Up @@ -315,9 +329,15 @@ private int disassembleInstruction(StringBuilder sb, int opcode, int i, int inst
sb.append("Jump if acc == 0 to ").append(HexUtil.formatHexUShort(arg1));
}
break;
case 0x36: {
bytesConsumed = 4;
int arg1 = DataUtil.getLEInt(fileData, instructionsOffset + i + bytesConsumed + bodyOffset);
sb.append("Jump if acc != 0 to ").append(HexUtil.formatHexUShort(arg1));
}
break;
case 0x54: {
bytesConsumed = 0;
sb.append("acc = !acc");
sb.append("acc <= 0");
}
break;
case 0x59: {
Expand Down Expand Up @@ -442,9 +462,11 @@ private enum ARGS_TYPE
NO_ARGS, ONE_ARG, ONE_ARG_INSTR, TWO_ARGS, VAR_ARGS, ARGS_130
}

// Decoding routine is at 0x001000c8

private ARGS_TYPE[] opCodeArgs = new ARGS_TYPE[]
{
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS, // 0x00
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
Expand All @@ -460,7 +482,8 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,

ARGS_TYPE.ONE_ARG, // 0x10
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
Expand All @@ -476,7 +499,8 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,

ARGS_TYPE.ONE_ARG, // 0x20
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
Expand All @@ -492,7 +516,8 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,

ARGS_TYPE.NO_ARGS, // 0x30
ARGS_TYPE.ONE_ARG_INSTR,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.ONE_ARG_INSTR,
Expand All @@ -508,7 +533,8 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG_INSTR,
ARGS_TYPE.ONE_ARG_INSTR,
ARGS_TYPE.ONE_ARG_INSTR,
ARGS_TYPE.ONE_ARG_INSTR,

ARGS_TYPE.ONE_ARG_INSTR, // 0x40
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
Expand All @@ -524,7 +550,8 @@ private enum ARGS_TYPE
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,

ARGS_TYPE.NO_ARGS, //0x50
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
Expand All @@ -540,7 +567,8 @@ private enum ARGS_TYPE
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,

ARGS_TYPE.NO_ARGS, // 0x60
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,
Expand All @@ -556,7 +584,8 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.NO_ARGS,

ARGS_TYPE.NO_ARGS, // 0x70
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.ONE_ARG,
Expand All @@ -568,12 +597,26 @@ private enum ARGS_TYPE
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.NO_ARGS,
ARGS_TYPE.ONE_ARG,
ARGS_TYPE.VAR_ARGS,
ARGS_TYPE.TWO_ARGS,
ARGS_TYPE.VAR_ARGS,
ARGS_TYPE.VAR_ARGS, // 0x7c
ARGS_TYPE.TWO_ARGS, // 0x7d
ARGS_TYPE.VAR_ARGS, // 0x7e
ARGS_TYPE.TWO_ARGS,
ARGS_TYPE.NO_ARGS,

ARGS_TYPE.NO_ARGS, // 0x80
ARGS_TYPE.ONE_ARG_INSTR,
ARGS_TYPE.ARGS_130
};
}

/*
Notes:
s0 = pc
a1 = 0(sp) = accumulator
s1
s2 = var base (also stack bottom)
s3
s6 = stack size (from s2)
t4 = var base + s8
s8 = 0
*/

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