remove i3

since we are now stopping after each iteration, it makes no sense to go
beyond 7864320 samples.

diff --git a/foo.S b/foo.S
index 0ef4c9d..92723ec 100644 (file)
--- a/foo.S
+++ b/foo.S
@@ -3,7 +3,6 @@
 #define i0   r17
 #define i1   r18
 #define i2   r19
-#define i3   r20
 #define n    r21
 #define s    r22
 #define t    r23 //==Ml
@@ -165,7 +164,6 @@ main: ; setup routine
        ; NOTE: clr i0 moved to .ord 0x0
        CLR     i1
        CLR     i2
-       CLR     i3
        CLR     acc ; we output a dummy sample before the actual first one
        LDI     Xhi, hi8(FLASHM + notes) ; never changes
        LDI     one, 1      ; mostly for clearing TIM0_OVF bit
@@ -261,15 +259,8 @@ sample:
        LSR     tmp
        OR      n, tmp
        #undef tmp
-       MOV     s, i3
+       MOV     s, i2
        LSR     s
-       ROR     s
-       ANDI    s, 0x80
-       #define tmp _
-       MOV     tmp, i2
-       LSR     tmp
-       OR      s, tmp
-       #undef tmp
 
        ; voice 1:
        MOV     t, n
@@ -310,17 +301,10 @@ sample:
        LSR     tmp
        OR      Ml, tmp
        #undef tmp
-       MOV     Mh, i3
-       SWAP    Mh
-       ANDI    Mh, 0xf0
-       LSL     Mh
-       #define tmp _
-       MOV     tmp, i2
-       LSR     tmp
-       LSR     tmp
-       LSR     tmp
-       OR      Mh, tmp
-       #undef tmp
+       MOV     Mh, i2
+       LSR     Mh
+       LSR     Mh
+       LSR     Mh
        RCALL   mod3
        ADD     t, n
        RCALL   g
@@ -358,17 +342,9 @@ sample:
        LSR     tmp
        OR      Ml, tmp
        #undef tmp
-       MOV     Mh, i3
-       SWAP    Mh
-       ANDI    Mh, 0xf0
-       LSL     Mh
-       LSL     Mh
-       #define tmp _
-       MOV     tmp, i2
-       LSR     tmp
-       LSR     tmp
-       OR      Mh, tmp
-       #undef tmp
+       MOV     Mh, i2
+       LSR     Mh
+       LSR     Mh
        RCALL   mod3
        SUB     t, n
        NEG     t
@@ -399,7 +375,6 @@ sample:
        SUBI    i0, -1
        SBCI    i1, -1
        SBCI    i2, -1
-       SBCI    i3, -1
 
 #ifdef DEBUG
        CBI     PORTB, 2   ; end runtime measurement