use BRMI instead of -CS

since we only compare small positive integers, it doesn't matter, but
BRCS/BRLO is unsigned comparison while BRMI is signed, what makes more
sense.

diff --git a/foo.S b/foo.S
index ceb50b7..a3d17e4 100644 (file)
--- a/foo.S
+++ b/foo.S
@@ -1,7 +1,8 @@
-//#define DEBUG
-#define CAL_MAGIC 0x9e   // attiny4 handwired
+#define DEBUG
+#define CAL_MAGIC 0x91   // attiny4 flex-lowpass 1
+//#define CAL_MAGIC 0x9e   // attiny4 handwired
 //#define CAL_MAGIC 0x8d  // attiny4 devboard
-//#define CAL_MAGIC 0xa7 // attiny9 devboard
+//#define CAL_MAGIC 0xa9 // attiny9 devboard
 
 
 /* REGISTER NAMES */
@@ -82,7 +83,7 @@ mod3: ; mod3(Mh.Ml) -> t
        ANDI    Ml, 0x03
        ADD     Ml, tmp
        CPI     Ml, 3
-       BRCS    skip
+       BRMI    skip
        SUBI    Ml, 3
        skip:
        RET