[libc] optimize _isblank

mateoconlechuga · mateoconlechuga · commit 9828409abf4a · 2024-10-24T20:43:17.000-06:00
diff --git a/src/libc/isblank.src b/src/libc/isblank.src
@@ -9,8 +9,7 @@ _isblank:
 	ld	a,l
 	cp	a,32
 	ret	z
-	cp	a,9
+	xor	a,9
 	ret	z
-	or	a,a
 	sbc	hl,hl
 	ret

-Original file line number
+Diff line change
 	ld	a,l
 	cp	a,32
 	ret	z
 -	cp	a,9
 +	xor	a,9
 	ret	z
 -	or	a,a
 	sbc	hl,hl
 	ret