Add tests

Author: boriel

tests/functional/ubyteopt.asm

@@ -0,0 +1,93 @@
+	org 32768
+__START_PROGRAM:
+	di
+	push ix
+	push iy
+	exx
+	push hl
+	exx
+	ld hl, 0
+	add hl, sp
+	ld (__CALL_BACK__), hl
+	ei
+	jp __MAIN_PROGRAM__
+ZXBASIC_USER_DATA:
+	; Defines USER DATA Length in bytes
+ZXBASIC_USER_DATA_LEN EQU ZXBASIC_USER_DATA_END - ZXBASIC_USER_DATA
+	.__LABEL__.ZXBASIC_USER_DATA_LEN EQU ZXBASIC_USER_DATA_LEN
+	.__LABEL__.ZXBASIC_USER_DATA EQU ZXBASIC_USER_DATA
+ZXBASIC_USER_DATA_END:
+__MAIN_PROGRAM__:
+	ld a, 2
+	push af
+	ld a, 1
+	push af
+	call _CanDraw
+	ld hl, 0
+	ld b, h
+	ld c, l
+__END_PROGRAM:
+	di
+	ld hl, (__CALL_BACK__)
+	ld sp, hl
+	exx
+	pop hl
+	exx
+	pop iy
+	pop ix
+	ei
+	ret
+__CALL_BACK__:
+	DEFW 0
+_CanDraw:
+	push ix
+	ld ix, 0
+	add ix, sp
+	ld a, (ix+7)
+	push af
+	ld h, 0
+	pop af
+	cp h
+	sbc a, a
+	push af
+	ld a, (ix+5)
+	push af
+	ld h, 0
+	pop af
+	cp h
+	sbc a, a
+	pop de
+	or d
+	push af
+	ld a, (ix+7)
+	push af
+	ld a, 20
+	pop hl
+	cp h
+	sbc a, a
+	pop de
+	or d
+	push af
+	ld a, (ix+5)
+	push af
+	ld a, 31
+	pop hl
+	cp h
+	sbc a, a
+	pop de
+	or d
+	jp z, __LABEL1
+	xor a
+	jp _CanDraw__leave
+__LABEL1:
+	ld a, 1
+_CanDraw__leave:
+	ld sp, ix
+	pop ix
+	exx
+	pop hl
+	pop bc
+	ex (sp), hl
+	exx
+	ret
+	END

tests/functional/ubyteopt.bas

@@ -0,0 +1,6 @@
+function CanDraw(x as ubyte, y as ubyte) as ubyte
+  if y<0 or x<0 or y>20 or x>31 then return 0
+  return 1
+end function
+
+CanDraw(1, 2)