Basic Arithmetic

These instructions perform scalar arithmetic and update numeric variables.

Opcode	Arguments	Operands (stack)	Description
add	type	left, right	Replaces two numeric operands with left + right in the selected type.
sub	type	left, right	Replaces two numeric operands with left - right in the selected type.
mul	type	left, right	Replaces two numeric operands with left * right in the selected type.
div	type	left, right	Replaces two numeric operands with left / right in the selected type.
mod	type	left, right	Replaces two numeric operands with the remainder of left / right in the selected type.
neg	type	value	Replaces one numeric operand with its negation in the selected type.
inc	name, type	-	Increments the named or indexed numeric variable and pushes the updated value.
dec	name, type	-	Decrements the named or indexed numeric variable without changing the stack.