no diff using different temp

tables.js

@@ -0,0 +1,33 @@
+function db(func) {
+    let lines = [];
+    for (let i = 0; i < 256; i += 16) {
+        let items = [];
+        for (let j = 0; j < 16; j++) {
+            let x = i + j;
+            items.push(func(x));
+        }
+        lines.push('    .byte ' + items.join(', '));
+    }
+    return lines.join('\n');
+}
+
+console.log(
+`.segment "TABLES"
+
+.export mul_lobyte256
+.export mul_hibyte256
+.export mul_hibyte512
+
+.align 256
+mul_lobyte256:
+${db((x) => Math.round(x * x / 2) & 0xff)}
+
+.align 256
+mul_hibyte256:
+${db((x) => (Math.round(x * x / 2) >> 8) & 0xff)}
+
+.align 256
+mul_hibyte512:
+${db((x) => (Math.round((x + 256) * (x + 256) / 2) >> 8) & 0xff)}
+
+`);