--- /dev/null
+// WIP pipeline loop demo
+
+let instruction_queue: (null | Instruction)[] = [];
+let instruction_cancel_queue: (null | Instruction[])[] = [];
+
+class Instruction {
+ pc: number;
+ reservation_station: null | ReservationStation;
+ canceled: boolean;
+ constructor(pc: number) {
+ this.pc = pc;
+ this.reservation_station = null;
+ this.canceled = false;
+ }
+ toString() {
+ return `0x${this.pc.toString(16)}`
+ }
+}
+
+class StageConnectionPoint {
+ stage: Stage;
+ x: number;
+ y: number;
+ constructor(stage: Stage, x: number, y: number) {
+ this.stage = stage;
+ this.x = x;
+ this.y = y;
+ }
+}
+
+const enum State {
+ Empty,
+ Starting,
+ Executing,
+ Canceling,
+ Finished,
+ Stalled,
+}
+
+function assert_unreachable(v: never): never { return v; }
+
+let diagram: HTMLElement;
+class Stage {
+ static readonly GRID_CELL_WIDTH = 100;
+ static readonly GRID_CELL_HEIGHT = 50;
+ static readonly BOX_WIDTH = 90;
+ static readonly BOX_HEIGHT = 40;
+ static readonly ALL_STAGES: Stage[] = [];
+ x: number;
+ y: number;
+ name: string;
+ instruction: Instruction | null;
+ group_node: SVGGElement;
+ box_node: SVGRectElement;
+ name_node: SVGTextElement;
+ status_text_node: SVGTextElement;
+ instruction_text_node: SVGTextElement;
+ top_connection_point: StageConnectionPoint;
+ bottom_connection_point: StageConnectionPoint;
+ left_connection_point: StageConnectionPoint;
+ right_connection_point: StageConnectionPoint;
+ state: State = State.Empty;
+ constructor(x: number, y: number, name: string) {
+ Stage.ALL_STAGES.push(this);
+ this.x = x;
+ this.y = y;
+ this.name = name;
+ this.instruction = null;
+ this.group_node = document.createElementNS("http://www.w3.org/2000/svg", "g");
+ this.box_node = document.createElementNS("http://www.w3.org/2000/svg", "rect");
+ this.box_node.setAttribute("width", String(Stage.BOX_WIDTH));
+ this.box_node.setAttribute("height", String(Stage.BOX_HEIGHT));
+ this.box_node.setAttribute("fill", "white");
+ this.box_node.setAttribute("stroke", "black");
+ this.box_node.setAttribute("x", String(x));
+ this.box_node.setAttribute("y", String(y));
+ this.group_node.appendChild(this.box_node);
+ this.name_node = document.createElementNS("http://www.w3.org/2000/svg", "text");
+ this.name_node.setAttribute("x", String(x + 5));
+ this.name_node.setAttribute("y", String(y + 5));
+ this.name_node.setAttribute("class", "stage_title");
+ this.name_node.textContent = name;
+ this.group_node.appendChild(this.name_node);
+ this.status_text_node = document.createElementNS("http://www.w3.org/2000/svg", "text");
+ this.status_text_node.setAttribute("x", String(x + 5));
+ this.status_text_node.setAttribute("y", String(y + Stage.BOX_HEIGHT - 5));
+ this.status_text_node.setAttribute("class", "stage_status_text");
+ this.status_text_node.textContent = "";
+ this.group_node.appendChild(this.status_text_node);
+ this.instruction_text_node = document.createElementNS("http://www.w3.org/2000/svg", "text");
+ this.instruction_text_node.setAttribute("x", String(x + Stage.BOX_WIDTH - 5));
+ this.instruction_text_node.setAttribute("y", String(y + 5));
+ this.instruction_text_node.setAttribute("class", "stage_instruction_text");
+ this.instruction_text_node.textContent = "";
+ this.group_node.appendChild(this.instruction_text_node);
+ diagram.appendChild(this.group_node);
+ this.top_connection_point = new StageConnectionPoint(this, x + Stage.BOX_WIDTH / 2, y);
+ this.bottom_connection_point = new StageConnectionPoint(this, x + Stage.BOX_WIDTH / 2, y + Stage.BOX_HEIGHT);
+ this.left_connection_point = new StageConnectionPoint(this, x, y + Stage.BOX_HEIGHT / 2);
+ this.right_connection_point = new StageConnectionPoint(this, x + Stage.BOX_WIDTH, y + Stage.BOX_HEIGHT / 2);
+ this.state = State.Empty;
+ }
+ update_visible_state() {
+ let bk_color;
+ let status_text;
+ switch (this.state) {
+ case State.Empty:
+ status_text = "empty"; bk_color = "#FFFFFF";
+ break;
+ case State.Starting:
+ status_text = "starting"; bk_color = "#C0C000";
+ break;
+ case State.Executing:
+ status_text = "executing"; bk_color = "#80FF80";
+ break;
+ case State.Canceling:
+ status_text = "canceling"; bk_color = "#C04040";
+ break;
+ case State.Finished:
+ status_text = "finished"; bk_color = "#8080FF";
+ break;
+ case State.Stalled:
+ status_text = "stalled"; bk_color = "#909090";
+ break;
+ default:
+ return assert_unreachable(this.state);
+ }
+ this.box_node.setAttribute("fill", bk_color);
+ this.status_text_node.textContent = status_text;
+ this.instruction_text_node.textContent = String(this.instruction || "");
+ }
+ tick_setup() { }
+ tick() { }
+}
+
+class ReservationStation extends Stage {
+ next_state: State;
+ constructor(x: number, y: number, name: string) {
+ super(x, y, name);
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ }
+ tick_setup() {
+ this.next_state = this.state;
+ switch (this.state) {
+ case State.Empty:
+ break;
+ case State.Starting:
+ if (this.instruction!.canceled) {
+ this.next_state = State.Canceling;
+ }
+ else if (setup_stage.instruction === this.instruction) {
+ this.next_state = State.Executing;
+ }
+ break;
+ case State.Executing:
+ if (this.instruction!.canceled) {
+ this.next_state = State.Canceling;
+ }
+ else if (finish_stage.instruction === this.instruction) {
+ this.next_state = State.Finished;
+ }
+ break;
+ case State.Canceling:
+ this.next_state = State.Empty;
+ break;
+ case State.Finished:
+ this.next_state = State.Empty;
+ break;
+ default:
+ throw new TypeError("invalid state value");
+ }
+ }
+ tick() {
+ switch (this.state) {
+ case State.Empty:
+ if (instruction_queue[0]) {
+ instruction_queue[0].reservation_station = this;
+ this.instruction = instruction_queue[0];
+ instruction_queue[0] = null;
+ this.state = State.Starting;
+ }
+ break;
+ case State.Starting:
+ case State.Executing:
+ this.state = this.next_state;
+ break;
+ case State.Canceling:
+ this.instruction!.reservation_station = null;
+ this.instruction = null;
+ this.state = State.Empty;
+ break;
+ case State.Finished:
+ this.instruction!.reservation_station = null;
+ this.instruction = null;
+ this.state = State.Empty;
+ break;
+ default:
+ throw new TypeError("invalid state value");
+ }
+ }
+}
+
+class LoopHeaderStage extends Stage {
+ next_state: State;
+ next_instruction: Instruction | null;
+ constructor(x: number, y: number) {
+ super(x, y, "loop hdr");
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ }
+}
+
+class LoopFooterStage extends Stage {
+ next_state: State;
+ next_instruction: Instruction | null;
+ constructor(x: number, y: number) {
+ super(x, y, "loop ftr");
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ }
+}
+
+class ComputeStage extends Stage {
+ next_state: State;
+ next_instruction: Instruction | null;
+ constructor(x: number, y: number, name: string) {
+ super(x, y, name);
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ }
+}
+
+class FinishStage extends Stage {
+ next_state: State;
+ next_instruction: Instruction | null;
+ constructor(x: number, y: number) {
+ super(x, y, "finish");
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ }
+}
+
+class SetupStage extends Stage {
+ next_state: State;
+ next_instruction: Instruction | null;
+ stalled: boolean;
+ constructor(x: number, y: number) {
+ super(x, y, "setup");
+ this.state = State.Empty;
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ this.stalled = false;
+ }
+ tick_setup() {
+ this.next_state = this.state;
+ this.next_instruction = this.instruction;
+ switch (this.state) {
+ case State.Empty:
+ for (let rs of reservation_stations) {
+ if (rs.state == State.Starting) {
+ this.next_instruction = rs.instruction;
+ this.next_state = State.Executing;
+ break;
+ }
+ }
+ break;
+ case State.Executing:
+ break;
+ case State.Canceling:
+ this.next_state = State.Empty;
+ this.next_instruction = null;
+ break;
+ default:
+ throw new TypeError("invalid state value");
+ }
+ }
+ tick() {
+ switch (this.state) {
+ case State.Empty:
+ for (let rs of reservation_stations) {
+
+ }
+ break;
+ case State.Stalled:
+ break;
+ case State.Executing:
+ break;
+ case State.Canceling:
+ break;
+ default:
+ throw new TypeError("invalid state value");
+ }
+ }
+}
+
+class Connection {
+ src_connection_point: StageConnectionPoint;
+ dst_connection_point: StageConnectionPoint;
+ path: { x: number | undefined; y: number | undefined; }[];
+ node: SVGPolylineElement;
+ constructor(src_connection_point: StageConnectionPoint, dst_connection_point: StageConnectionPoint, path: { x: number | undefined; y: number | undefined; }[]) {
+ this.src_connection_point = src_connection_point;
+ this.dst_connection_point = dst_connection_point;
+ this.path = path;
+ this.node = document.createElementNS("http://www.w3.org/2000/svg", "polyline");
+ let points = [[src_connection_point.x, src_connection_point.y]];
+ let x = src_connection_point.x;
+ let y = src_connection_point.y;
+ for (let path_element of path) {
+ if (path_element.x !== undefined) {
+ x = path_element.x;
+ points.push([x, y]);
+ }
+ if (path_element.y !== undefined) {
+ y = path_element.y;
+ points.push([x, y]);
+ }
+ }
+ points.push([dst_connection_point.x, y]);
+ points.push([dst_connection_point.x, dst_connection_point.y]);
+ let points_str = points.map(v => v.join()).join(" ");
+ this.node.setAttribute("class", "connection");
+ this.node.setAttribute("points", points_str);
+ this.node.textContent = name;
+ diagram.appendChild(this.node);
+ }
+}
+
+let reservation_stations: ReservationStation[] = [];
+let setup_stage: SetupStage;
+let finish_stage: FinishStage;
+let loop_stages: ComputeStage[] = [];
+let loop_header_stage: LoopHeaderStage;
+let loop_footer_stage: LoopFooterStage;
+let next_pc = 0x1000;
+
+function add_instructions() {
+ if (instruction_queue.length < 10) {
+ let instr = new Instruction(next_pc);
+ next_pc += 4;
+ instruction_queue.push(instr);
+ if (Math.random() < 0.4) {
+ let cancel_time = Math.floor(Math.random() * 10) + 1;
+ if (!instruction_cancel_queue[cancel_time]) {
+ instruction_cancel_queue[cancel_time] = [];
+ }
+ instruction_cancel_queue[cancel_time]!.push(instr);
+ }
+ }
+}
+
+function cancel_instructions() {
+ if (instruction_cancel_queue.length) {
+ let first = instruction_cancel_queue.shift();
+ if (first) {
+ for (let i of first) {
+ i.canceled = true;
+ }
+ }
+ }
+}
+
+function tick() {
+ add_instructions();
+ cancel_instructions();
+ for (let i of Stage.ALL_STAGES) {
+ i.tick_setup();
+ }
+ for (let i of Stage.ALL_STAGES) {
+ i.tick();
+ }
+ if (instruction_queue[0] === undefined)
+ instruction_queue.shift();
+ update_visible_state();
+}
+
+function update_visible_state() {
+ for (let i of Stage.ALL_STAGES) {
+ i.update_visible_state();
+ }
+}
+
+function load() {
+ diagram = document.getElementById("diagram")!;
+ let loop_stage_count = 3;
+ setup_stage = new SetupStage(Stage.GRID_CELL_WIDTH, 2 * Stage.GRID_CELL_HEIGHT);
+ let reservation_station_count = 7;
+ for (let i = 0; i < 7; i++) {
+ let stage = new ReservationStation(0, Stage.GRID_CELL_HEIGHT * i, `rs${i}`);
+ reservation_stations.push(stage);
+ new Connection(stage.right_connection_point, setup_stage.left_connection_point,
+ [{ x: Stage.BOX_WIDTH + 3, y: setup_stage.left_connection_point.y }]);
+ }
+ loop_header_stage = new LoopHeaderStage(Stage.GRID_CELL_WIDTH * 2, 2 * Stage.GRID_CELL_HEIGHT);
+ new Connection(setup_stage.right_connection_point, loop_header_stage.left_connection_point, []);
+ let prev_stage = loop_header_stage;
+ for (let i = 0; i < loop_stage_count; i++) {
+ let stage = new ComputeStage(Stage.GRID_CELL_WIDTH * (3 + i), 2 * Stage.GRID_CELL_HEIGHT, `compute${i}`);
+ loop_stages.push(stage);
+ new Connection(prev_stage.right_connection_point, stage.left_connection_point, []);
+ prev_stage = stage;
+ }
+ loop_footer_stage = new LoopFooterStage(Stage.GRID_CELL_WIDTH * (3 + loop_stage_count), 2 * Stage.GRID_CELL_HEIGHT);
+ new Connection(prev_stage.right_connection_point, loop_footer_stage.left_connection_point, []);
+ new Connection(loop_footer_stage.bottom_connection_point, loop_header_stage.bottom_connection_point,
+ [{ x: loop_footer_stage.bottom_connection_point.x, y: 3 * Stage.GRID_CELL_HEIGHT + 5 }]);
+ finish_stage = new FinishStage(Stage.GRID_CELL_WIDTH * (4 + loop_stage_count), 2 * Stage.GRID_CELL_HEIGHT);
+ new Connection(loop_footer_stage.right_connection_point, finish_stage.left_connection_point, []);
+ for (let rs of reservation_stations) {
+ new Connection(finish_stage.top_connection_point, rs.left_connection_point,
+ [{ x: finish_stage.top_connection_point.x, y: -5 }, { x: -7, y: rs.left_connection_point.y }]);
+ }
+ setInterval(tick, 1500);
+ update_visible_state();
+}
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