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https://git.sfja.dk/Mikkel/slige.git
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before assembler2
This commit is contained in:
sfja
parent
63e4af02ca
commit
2dad35c21f
143
compiler/arch.ts
143
compiler/arch.ts
@ -5,38 +5,121 @@ export type Ins = Ops | number;
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export type Ops = typeof Ops;
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export const Ops = {
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Nop: 0,
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PushNull: 1,
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PushInt: 2,
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PushBool: 3,
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PushString: 4,
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PushPtr: 5,
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Pop: 6,
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LoadLocal: 7,
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StoreLocal: 8,
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Call: 9,
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Return: 10,
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Jump: 11,
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JumpIfTrue: 12,
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Add: 13,
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Subtract: 14,
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Multiply: 15,
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Divide: 16,
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Remainder: 17,
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Equal: 18,
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LessThan: 19,
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And: 20,
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Or: 21,
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Xor: 22,
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Not: 23,
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SourceMap: 24,
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Builtin: 25,
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ReserveStatics: 26,
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LoadStatic: 27,
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StoreStatic: 28,
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Nop: 0x00,
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PushNull: 0x01,
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PushInt: 0x02,
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PushBool: 0x03,
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PushString: 0x04,
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PushPtr: 0x05,
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Pop: 0x06,
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ReserveStatic: 0x07,
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LoadStatic: 0x08,
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StoreStatic: 0x09,
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LoadLocal: 0x0a,
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StoreLocal: 0x0b,
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Call: 0x0c,
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Return: 0x0d,
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Jump: 0x0e,
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JumpIfTrue: 0x0f,
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Builtin: 0x10,
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Add: 0x20,
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Subtract: 0x21,
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Multiply: 0x22,
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Divide: 0x23,
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Remainder: 0x24,
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Equal: 0x25,
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LessThan: 0x26,
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And: 0x27,
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Or: 0x28,
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Xor: 0x29,
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Not: 0x2a,
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SourceMap: 0x30,
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} as const;
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export type Builtins = typeof Builtins;
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export const Builtins = {
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StringAdd: 0,
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StringConcat: 0x10,
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StringEqual: 0x11,
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ArraySet: 0x20,
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StructSet: 0x30,
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} as const;
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export function opToString(op: number): string {
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switch (op) {
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case Ops.Nop:
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return "Nop";
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case Ops.PushNull:
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return "PushNull";
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case Ops.PushInt:
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return "PushInt";
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case Ops.PushBool:
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return "PushBool";
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case Ops.PushString:
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return "PushString";
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case Ops.PushPtr:
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return "PushPtr";
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case Ops.Pop:
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return "Pop";
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case Ops.ReserveStatic:
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return "ReserveStatic";
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case Ops.LoadStatic:
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return "LoadStatic";
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case Ops.StoreStatic:
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return "StoreStatic";
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case Ops.LoadLocal:
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return "LoadLocal";
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case Ops.StoreLocal:
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return "StoreLocal";
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case Ops.Call:
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return "Call";
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case Ops.Return:
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return "Return";
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case Ops.Jump:
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return "Jump";
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case Ops.JumpIfTrue:
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return "JumpIfTrue";
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case Ops.Builtin:
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return "Builtin";
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case Ops.Add:
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return "Add";
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case Ops.Subtract:
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return "Subtract";
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case Ops.Multiply:
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return "Multiply";
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case Ops.Divide:
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return "Divide";
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case Ops.Remainder:
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return "Remainder";
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case Ops.Equal:
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return "Equal";
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case Ops.LessThan:
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return "LessThan";
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case Ops.And:
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return "And";
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case Ops.Or:
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return "Or";
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case Ops.Xor:
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return "Xor";
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case Ops.Not:
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return "Not";
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case Ops.SourceMap:
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return "SourceMap";
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default:
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return `<unknown Op ${op}>`;
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}
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}
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export function builtinToString(builtin: number): string {
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switch (builtin) {
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case Builtins.StringConcat:
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return "StringConcat";
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case Builtins.StringEqual:
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return "StringEqual";
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case Builtins.ArraySet:
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return "ArraySet";
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case Builtins.StructSet:
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return "StructSet";
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default:
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return `<unknown Builtin ${builtin}>`;
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}
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}
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@ -1,4 +1,4 @@
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import { Ops } from "./arch.ts";
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import { Ops, opToString } from "./arch.ts";
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export type Line = {
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labels?: number[];
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@ -95,3 +95,101 @@ export class Assembler {
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return output;
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}
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}
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export type Line2 = { labels?: number[]; ins: Ins2 };
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export type Ins2 = [Ops, ...Lit[]];
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export type Lit = number | string | boolean | Label;
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export class Assembler2 {
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private lines: Line2[] = [];
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private addedLabels: number[] = [];
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private labelCounter = 0;
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public add(ins: Ins2): Assembler2 {
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if (this.addedLabels.length > 0) {
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this.lines.push({ ins, labels: this.addedLabels });
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this.addedLabels = [];
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return this;
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}
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this.lines.push({ ins });
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return this;
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}
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public makeLabel(): Label {
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return { label: this.labelCounter++ };
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}
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public setLabel({ label }: Label) {
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this.addedLabels.push(label);
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}
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public assemble(): number[] {
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let ip = 0;
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const output: number[] = [];
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const locs: { [key: number]: number } = {};
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const refs: { [key: number]: number } = {};
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for (const line of this.lines) {
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for (const lit of line.ins as Lit[]) {
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if (typeof lit === "number") {
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output.push(lit);
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ip += 1;
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} else if (typeof lit === "boolean") {
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output.push(lit ? 1 : 0);
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ip += 1;
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} else if (typeof lit === "string") {
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for (let i = 0; i < lit.length; ++i) {
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output.push(lit.charCodeAt(i));
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ip += 1;
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}
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} else {
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output.push(0);
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refs[ip] = lit.label;
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ip += 1;
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}
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}
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}
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for (let i = 0; i < output.length; ++i) {
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if (!(i in refs)) {
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continue;
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}
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if (!(refs[i] in locs)) {
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console.error(
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`Assembler: label '${refs[i]}' used at ${i} not defined`,
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);
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continue;
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}
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output[i] = locs[refs[i]];
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}
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return output;
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}
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public printProgram() {
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for (const line of this.lines) {
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for (const label of line.labels ?? []) {
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console.log(`.L${label}:`);
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}
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const op = opToString(line.ins[0] as unknown as number).padEnd(
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13,
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" ",
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);
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const args = (line.ins.slice(1) as Lit[]).map((lit) => {
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if (typeof lit === "number") {
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return lit;
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} else if (typeof lit === "boolean") {
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return lit.toString();
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} else if (typeof lit === "string") {
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return '"' +
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lit.replaceAll("\\", "\\\\").replaceAll("\0", "\\0")
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.replaceAll("\n", "\\n").replaceAll("\t", "\\t")
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.replaceAll("\r", "\\r") +
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'"';
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} else {
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return `.L${lit.label}`;
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}
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}).join(", ");
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console.log(` ${op} ${args}`);
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}
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}
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}
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@ -2,13 +2,14 @@ import { Builtins } from "./arch.ts";
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import { BinaryType, Expr, Stmt } from "./ast.ts";
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import { LocalLeaf, Locals, LocalsFnRoot } from "./lowerer_locals.ts";
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import { Ops } from "./mod.ts";
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import { Assembler } from "./program_builder.ts";
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import { Assembler, Label } from "./assembler.ts";
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import { VType, vtypeToString } from "./vtype.ts";
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export class Lowerer {
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private program = new Assembler();
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private locals: Locals = new LocalsFnRoot();
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private fnStmtIdAddrMap: { [key: number]: number } = {};
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private breakStack: Label[] = [];
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public lower(stmts: Stmt[]) {
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for (const stmt of stmts) {
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@ -37,7 +38,9 @@ export class Lowerer {
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private lowerStmt(stmt: Stmt) {
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switch (stmt.kind.type) {
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case "error":
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break;
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case "break":
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return this.lowerBreakStmt(stmt);
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case "return":
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break;
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case "fn":
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@ -45,7 +48,7 @@ export class Lowerer {
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case "let":
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return this.lowerLetStmt(stmt);
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case "assign":
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break;
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return this.lowerAssignStmt(stmt);
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case "expr":
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this.lowerExpr(stmt.kind.expr);
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this.program.push(Ops.Pop);
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@ -54,6 +57,49 @@ export class Lowerer {
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throw new Error(`unhandled stmt '${stmt.kind.type}'`);
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}
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private lowerAssignStmt(stmt: Stmt) {
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if (stmt.kind.type !== "assign") {
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throw new Error();
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}
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this.lowerExpr(stmt.kind.value);
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switch (stmt.kind.subject.kind.type) {
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case "field": {
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this.lowerExpr(stmt.kind.subject.kind.subject);
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this.addPushStringOp(stmt.kind.subject.kind.value);
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this.program.addOp(Ops.Builtin);
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this.program.addLit(Builtins.StructSet);
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return;
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}
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case "index": {
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this.lowerExpr(stmt.kind.subject.kind.subject);
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this.lowerExpr(stmt.kind.subject.kind.value);
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this.program.addOp(Ops.Builtin);
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this.program.addLit(Builtins.ArraySet);
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return;
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}
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case "sym": {
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this.program.addOp(Ops.StoreLocal);
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this.program.addLit(
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this.locals.symId(stmt.kind.subject.kind.sym.ident),
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);
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return;
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}
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default:
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throw new Error();
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}
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}
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private lowerBreakStmt(stmt: Stmt) {
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if (stmt.kind.type !== "break") {
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throw new Error();
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}
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if (stmt.kind.expr) {
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this.lowerExpr(stmt.kind.expr);
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}
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this.program.addOp(Ops.Jump);
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this.program.addRef(this.breakStack.at(-1)!);
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}
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private lowerFnStmt(stmt: Stmt) {
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if (stmt.kind.type !== "fn") {
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throw new Error();
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@ -119,7 +165,7 @@ export class Lowerer {
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case "if":
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return this.lowerIfExpr(expr);
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case "loop":
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break;
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return this.lowerLoopExpr(expr);
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case "block":
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return this.lowerBlockExpr(expr);
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}
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@ -163,9 +209,13 @@ export class Lowerer {
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if (expr.kind.type !== "string") {
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throw new Error();
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}
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this.program.push(Ops.PushString);
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for (let i = 0; i < expr.kind.value.length; ++i) {
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this.program.push(expr.kind.value.charCodeAt(i));
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this.addPushStringOp(expr.kind.value);
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}
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private addPushStringOp(value: string) {
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this.program.addOp(Ops.PushString);
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for (let i = 0; i < value.length; ++i) {
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this.program.addLit(value.charCodeAt(i));
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}
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}
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@ -175,34 +225,42 @@ export class Lowerer {
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}
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this.lowerExpr(expr.kind.left);
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this.lowerExpr(expr.kind.right);
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if (expr.vtype!.type === "int") {
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const vtype = expr.kind.left.vtype!;
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if (vtype.type === "int") {
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switch (expr.kind.binaryType) {
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case "+":
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this.program.push(Ops.Add);
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this.program.addOp(Ops.Add);
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return;
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case "*":
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this.program.push(Ops.Multiply);
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this.program.addOp(Ops.Multiply);
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return;
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case "==":
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case "-":
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case "/":
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case "!=":
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case "<":
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case ">":
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case "<=":
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this.program.addOp(Ops.Equal);
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return;
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case ">=":
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case "or":
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case "and":
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this.program.addOp(Ops.LessThan);
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this.program.addOp(Ops.Not);
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return;
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default:
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}
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}
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if (expr.vtype!.type === "string") {
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if (vtype.type === "string") {
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if (expr.kind.binaryType === "+") {
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this.program.push(Ops.Builtin, Builtins.StringAdd);
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this.program.push(Ops.Builtin, Builtins.StringConcat);
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return;
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}
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if (expr.kind.binaryType === "==") {
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this.program.push(Ops.Builtin, Builtins.StringEqual);
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return;
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}
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if (expr.kind.binaryType === "!=") {
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this.program.push(Ops.Builtin, Builtins.StringEqual, Ops.Not);
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return;
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}
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}
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throw new Error(
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`unhandled binaryType` +
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` '${vtypeToString(expr.vtype!)}' aka. ` +
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` '${vtypeToString(expr.kind.left.vtype!)}'` +
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` ${expr.kind.binaryType}` +
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` '${vtypeToString(expr.kind.left.vtype!)}'`,
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@ -239,11 +297,34 @@ export class Lowerer {
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this.program.setLabel(falseLabel);
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this.lowerExpr(expr.kind.falsy!);
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if (expr.kind.falsy) {
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this.lowerExpr(expr.kind.falsy!);
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}
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this.program.setLabel(doneLabel);
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}
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private lowerLoopExpr(expr: Expr) {
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if (expr.kind.type !== "loop") {
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throw new Error();
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}
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const contineLabel = this.program.makeLabel();
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const breakLabel = this.program.makeLabel();
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this.breakStack.push(breakLabel);
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this.program.setLabel(contineLabel);
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this.lowerExpr(expr.kind.body);
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this.program.addOp(Ops.Jump);
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this.program.addRef(breakLabel);
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this.program.setLabel(breakLabel);
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if (expr.vtype!.type === "null") {
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this.program.addOp(Ops.PushNull);
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}
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this.breakStack.pop();
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}
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private lowerBlockExpr(expr: Expr) {
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if (expr.kind.type !== "block") {
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throw new Error();
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@ -256,8 +337,12 @@ export class Lowerer {
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if (expr.kind.expr) {
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this.lowerExpr(expr.kind.expr);
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} else {
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this.program.push(Ops.PushNull);
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this.program.addOp(Ops.PushNull);
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}
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this.locals = outerLocals;
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}
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public printProgram() {
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this.program.printProgram();
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}
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}
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@ -15,5 +15,6 @@ new Checker().check(ast);
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// console.log(JSON.stringify(ast, null, 4))
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const lowerer = new Lowerer();
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lowerer.lower(ast);
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lowerer.printProgram();
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const program = lowerer.finish();
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console.log(JSON.stringify(program, null, 4));
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