Post-stream update

1 files changed, 265 insertions, 0 deletions

diff --git a/2026/games_submissions/liquidcake/instructions.mjs b/2026/games_submissions/liquidcake/instructions.mjs
new file mode 100644
index 0000000..58c6aab
--- /dev/null
+++ b/2026/games_submissions/liquidcake/instructions.mjs
@@ -0,0 +1,265 @@
+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;
+}