;; #LAYOUT# STD *       #TAKE
;; #LAYOUT# X16 BASIC_0 #TAKE-OFFSET 2000
;; #LAYOUT# *   BASIC_0 #TAKE
;; #LAYOUT# *   *       #IGNORE

;
; Math package - subtract FAC1 from FAC2
;
; See also:
; - [CM64] Computes Mapping the Commodore 64 - page 112
; - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
; - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
;

; XXX test this

sub_FAC2_FAC1:

	; Toggle FAC1 sign
	lda FAC1_sign
	eor #$FF
	sta FAC1_sign

	; Perform addition
	jmp add_FAC2_FAC1
