mandel-6502/tables.js

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705 B
JavaScript
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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');
}
let squares = [];
for (let i = 0; i < 512; i++) {
squares.push(Math.trunc((i * i + 1) / 2));
}
console.log(
`.segment "TABLES"
.export mul_lobyte256
.export mul_hibyte256
.export mul_hibyte512
.align 256
mul_lobyte256:
${db((i) => squares[i] & 0xff)}
.align 256
mul_hibyte256:
${db((i) => (squares[i] >> 8) & 0xff)}
.align 256
mul_hibyte512:
${db((i) => (squares[i + 256] >> 8) & 0xff)}
`);