68kcounter/dist/parse/instructionQualifier.js

68000 ASM source code cycle counter

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const syntax_1 = require("../syntax");
/**
 * Gets the size qualifier of an instruction, applying defaults where not specified
 */
function instructionQualifier({ opcode: { op, qualifier }, operands, }) {
    if (qualifier) {
        return qualifier.name;
    }
    else if (longDefault.includes(op.name)) {
        return syntax_1.Qualifiers.L;
    }
    else if (byteDefault.includes(op.name)) {
        return syntax_1.Qualifiers.B;
    }
    else if (bitOps.includes(op.name)) {
        return operands[1] && operands[1].mode === syntax_1.AddressingModes.Dn
            ? syntax_1.Qualifiers.L
            : syntax_1.Qualifiers.B;
    }
    else if (unsized.includes(op.name)) {
        return null;
    }
    return syntax_1.Qualifiers.W;
}
exports.default = instructionQualifier;
// Default to word size for instructions apart from these exceptions:
const unsized = [
    syntax_1.Mnemonics.JMP,
    syntax_1.Mnemonics.JSR,
    syntax_1.Mnemonics.NOP,
    syntax_1.Mnemonics.RESET,
    syntax_1.Mnemonics.RTE,
    syntax_1.Mnemonics.RTR,
    syntax_1.Mnemonics.RTS,
    syntax_1.Mnemonics.STOP,
    syntax_1.Mnemonics.TRAP,
    syntax_1.Mnemonics.TRAPV,
    syntax_1.Mnemonics.UNLK,
    syntax_1.Mnemonics.ILLEGAL,
];
const longDefault = [
    syntax_1.Mnemonics.MOVEQ,
    syntax_1.Mnemonics.EXG,
    syntax_1.Mnemonics.LEA,
    syntax_1.Mnemonics.PEA,
];
const byteDefault = [
    syntax_1.Mnemonics.NBCD,
    syntax_1.Mnemonics.ABCD,
    syntax_1.Mnemonics.SBCD,
    syntax_1.Mnemonics.SCC,
    syntax_1.Mnemonics.TAS,
    ...syntax_1.mnemonicGroups.SCC,
];
const bitOps = [
    syntax_1.Mnemonics.BCHG,
    syntax_1.Mnemonics.BSET,
    syntax_1.Mnemonics.BCLR,
    syntax_1.Mnemonics.BTST,
];