refactoring and start on squares

tables.js

@@ -22,7 +22,10 @@ console.log(
 .export mul_lobyte256
 .export mul_hibyte256
 .export mul_hibyte512
+.export sqr_lobyte
+.export sqr_hibyte
 
+; (i * i + 1) / 2 for the multiplier
 .align 256
 mul_lobyte256:
 ${db((i) => squares[i] & 0xff)}
@@ -35,4 +38,13 @@ ${db((i) => (squares[i] >> 8) & 0xff)}
 mul_hibyte512:
 ${db((i) => (squares[i + 256] >> 8) & 0xff)}
 
+; (i * i) for the plain squares
+.align 256
+sqr_lobyte:
+${db((i) => (i * i) & 0xff)}
+
+.align 256
+sqr_hibyte:
+${db((i) => ((i * i) >> 8) & 0xff)}
+
 `);