broken-neees/cpu/FlagsRegister.js

A really broken NEEES emulator that introduces glitches and random bugs on purpose!

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _byte = _interopRequireDefault(require("../lib/byte"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var FlagsRegister = /*#__PURE__*/function () {
  function FlagsRegister() {
    _classCallCheck(this, FlagsRegister);
    this.c = false;
    this.z = false;
    this.i = false;
    this.d = false;
    this.v = false;
    this.n = false;
  }
  _createClass(FlagsRegister, [{
    key: "getValue",
    value: function getValue() {
      return _byte.default.bitfield(this.c, this.z, this.i, this.d, 0, 1, this.v, this.n);
    }
  }, {
    key: "setValue",
    value: function setValue(value) {
      this.c = _byte.default.getFlag(value, 0);
      this.z = _byte.default.getFlag(value, 1);
      this.i = _byte.default.getFlag(value, 2);
      this.d = _byte.default.getFlag(value, 3);
      this.v = _byte.default.getFlag(value, 6);
      this.n = _byte.default.getFlag(value, 7);
    }
  }, {
    key: "updateZero",
    value: function updateZero(value) {
      this.z = value === 0;
    }
  }, {
    key: "updateNegative",
    value: function updateNegative(value) {
      this.n = _byte.default.isNegative(value);
    }
  }, {
    key: "updateZeroAndNegative",
    value: function updateZeroAndNegative(value) {
      this.updateZero(value);
      this.updateNegative(value);
    }
  }]);
  return FlagsRegister;
}();
exports.default = FlagsRegister;