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

//
// Math package - evaluate FAC1 sign, to .A
//
// Output:
// - .A - 0 for FAC1 equal 0, 1 for FAC1 > 0, -1 for FAC1 < 0
//
// See also:
// - [CM64] Computes Mapping the Commodore 64 - page 115
// - https://www.c64-wiki.com/wiki/Floating_point_arithmetic
// - https://codebase64.org/doku.php?id=base:kernal_floating_point_mathematics
//

sgn_FAC1_A:

	lda FAC1_exponent
	beq !+
	lda FAC1_sign
	bne !+
	lda #$01
!:
	rts