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export let instructions_raw = {
"+": {
impl: function (thread) { thread.stack.push(thread.pop() + thread.pop()); },
desc: "b a → b + a",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] += stack.pop();",
},
"-": {
impl: function (thread) { thread.stack.push(-thread.pop() + thread.pop()); },
desc: "b a → b - a",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] -= stack.pop();",
},
"*": {
impl: function (thread) { thread.stack.push(thread.pop() * thread.pop()); },
desc: "b a → b * a",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] *= stack.pop();",
},
"/": {
impl: function (thread) { let a = thread.pop(); let b = thread.pop(); thread.stack.push(Math.round(b / a)); },
desc: "b a → b // a",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] /= stack.pop();",
},
"%": {
impl: function (thread) { let a = thread.pop(); let b = thread.pop(); thread.stack.push(b % a); },
desc: "b a → b % a",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] %= stack.pop();",
},
"!": {
impl: function (thread) { thread.stack.push(thread.pop() == 0 ? 1 : 0); },
desc: "a → a == 0 ? 1 : 0",
can_jit: true,
stack_min: 1,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 1] = stack[stack.length - 1] ? 1 : 0;",
},
"`": {
impl: function (thread) { thread.stack.push(thread.pop() < thread.pop() ? 1 : 0); },
desc: "b a → b > a ? 1 : 0",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "stack[stack.length - 2] = stack.pop() < stack[stack.length - 1] ? 0 : 1;",
},
"<": {
impl: function (thread) { thread.cold = -1; thread.rowd = 0; },
desc: "() → (); go left",
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
can_jit: true,
},
">": {
impl: function (thread) { thread.cold = 1; thread.rowd = 0; },
desc: "() → (); go right",
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
can_jit: true,
},
"^": {
impl: function (thread) { thread.cold = 0; thread.rowd = -1; },
desc: "() → (); go up",
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
can_jit: true,
},
"v": {
impl: function (thread) { thread.cold = 0; thread.rowd = 1; },
desc: "() → (); go down",
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
can_jit: true,
},
"?": {
impl: function (thread) { let x = Math.floor(Math.random() * 4); thread.cold = ((x % 2) * 2 - 1) * Math.floor(x / 2); thread.rowd = ((x % 2) * 2 - 1) * ( 1 - Math.floor(x / 2)); },
desc: "() → (); go random cardinal",
can_jit: false,
},
"_": {
impl: function (thread) { thread.rowd = 0; thread.cold = thread.pop() == 0 ? 1 : -1; },
desc: "a → (); a == 0 ? go right : go left",
can_jit: false,
},
"|": {
impl: function (thread) { thread.cold = 0; thread.rowd = thread.pop() == 0 ? 1 : -1; },
desc: "a → (); a == 0 ? go down : go up",
can_jit: false,
},
'"': {
impl: function (thread) { thread.mode = "string"; },
desc: "; toggle string mode",
can_jit: false, // TODO this should be OK, but we'll need JIT for string mode.
stack_min: 0,
stack_return: 0,
},
":": {
impl: function (thread) { thread.stack.push(thread.stack[thread.stack.length-1]); },
desc: "a → a a",
can_jit: true,
stack_min: 1,
stack_return: 2,
unchecked_js_code: "stack.push(stack[stack.length-1]);",
},
"\\": {
impl: function (thread) { let a = thread.pop(); var b = thread.pop(); thread.stack.push(a, b); },
desc: "b a → a b",
can_jit: true,
stack_min: 2,
stack_return: 2,
unchecked_js_code: "stack.push(stack.pop(), stack.pop());",
},
"$": {
impl: function (thread) { thread.pop(); },
desc: "a → ()",
can_jit: true,
stack_min: 1,
stack_return: 0,
unchecked_js_code: "stack.pop();",
},
".": {
impl: function (thread) { thread.interpreter.out(thread.pop() + " "); },
desc: "a → (); output a",
can_jit: false,
},
",": {
impl: function (thread) { thread.interpreter.out(String.fromCharCode(thread.pop())); },
desc: "a → (); output chr(a)",
can_jit: false,
},
"#": {
impl: function (thread) { thread.col += thread.cold; thread.row += thread.rowd; },
desc: "; jump one cell",
can_jit: true,
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
},
"g": {
impl: function (thread) { let row = thread.pop(); var col = thread.pop(); thread.stack.push(thread.interpreter.get_field(thread, col, row)); },
desc: "col row → field[row][col]",
can_jit: true,
stack_min: 2,
stack_return: 1,
unchecked_js_code: "{let row = stack.pop(); stack[stack.length-1] = (thread.interpreter.get_field(thread, stack[stack.length-1], row));}",
},
"p": {
impl: function (thread) { let row = thread.pop(); var col = thread.pop(); var val = thread.pop(); thread.interpreter.set_field(thread, col, row, val); },
desc: "val col row → (); field[row][col] = val",
can_jit: true,
stack_min: 3,
stack_return: 0,
unchecked_js_code: function (thread_state) {
return `
{
let row = stack.pop();
let col = stack.pop();
thread.interpreter.set_field(thread, col, row, stack.pop());
for (let i=0; i<jit.path.length; i++) {
if (jit.path[i][0] == row && jit.path[i][1] == col) {
thread.row = ${thread_state.row} + ${thread_state.rowd};
thread.col = ${thread_state.col} + ${thread_state.cold};
thread.rowd = ${thread_state.rowd};
thread.cold = ${thread_state.cold};
return;
}
}
}`},
},
"t": {
impl: function (thread) { thread.interpreter.new_thread(thread.split_thread()); },
desc: "; create new thread in reverse direction",
can_jit: false,
},
// "&" input character TODO
"~": { // TODO handle EOF properly (push nothing)
impl: function (thread) {
if (thread.interpreter.stdin_queue.length > 0) {
console.log("Have data!");
thread.stack.push(thread.interpreter.stdin_queue.pop());
} else {
console.log("Have no data!");
return new Promise(r => thread.interpreter.stdin_waiters.push(r)).then(function (char_code) {thread.stack.push(char_code); thread.blocked = false;});
}
},
desc: "() → x; read a character from input",
can_jit: false,
},
"@": {
impl: function (thread) { thread.interpreter.output_error(thread, "Normal termination!"); thread.running = false; },
desc: "; stop current thread",
can_jit: false,
},
"]": {
impl: function (thread) { thread.interpreter.output_error(thread, "Debug!"); },
desc: "; dump thread debug",
can_jit: false,
},
" ": {
impl: function (thread) { },
desc: "; no-op",
can_jit: true,
stack_min: 0,
stack_return: 0,
unchecked_js_code: "",
},
"(": {
impl: function (thread) {
const n = thread.pop();
let x = 0;
for(let i=0; i<n; i++) {
x = x * 256 + thread.pop();
}
if (thread.interpreter.overlays[x]) {
// We don't support ")" anyway so for now don't
// need to know how to undo...
for(let [k, v] of Object.entries(thread.interpreter.overlays[x])) {
thread.overlays[k.charCodeAt(0)] = v.impl;
}
thread.stack.push(x);
thread.stack.push(1);
} else {
// Failure, reverse direction.
thread.cold *= -1;
thread.rowd *= -1;
}
},
desc: "xn ... x1 n → f=(x1 + x2*256 + ... + xn*256^(n-1)) 1 | (); load semantic f or reverse",
can_jit: false, // Varargs approach makes JIT hard!
},
};
// Add numbers 0-9
for(let i=0; i<10; i++) {
const j = i; // Prevent any capture shenanigans.
instructions_raw[i] = {
impl: function (state) { state.stack.push(j); },
desc: `() → ${i}`,
can_jit: true,
stack_min: 0,
stack_return: 1,
unchecked_js_code: `stack.push(${i});`,
};
}
// Fast access instructions array.
export let instructions = {};
for(let [s, val] of Object.entries(instructions_raw)) {
instructions[s.charCodeAt(0)] = val.impl;
}
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