Optimized __setflag, removed float64_to_int.c

Author: ZERICO2005

src/crt/float64_to_int.c

@@ -30,8 +30,6 @@ __ishru_b   := 000188h
 __itol      := 000194h
 	public	__ltof
 __ltof      := 000284h
-	public	__setflag
-__setflag   := 000218h
 	public	__sshl_b
 __sshl_b    := 000244h
 	public	__sshrs_b

src/crt/os.src

@@ -0,0 +1,24 @@
+	assume	adl=1
+
+	section	.text
+
+	public	__setflag
+
+if PREFER_OS_CRT
+
+__setflag := 000218h
+
+else
+
+__setflag:
+	ret	po
+	push	af
+	ex	(sp), hl
+	ld	a, l
+	xor	a, $80	; invert S flag
+	ld	l, a
+	ex	(sp), hl
+	pop	af
+	ret
+
+end if