new version

diff --git a/foo.c b/foo.c
index e246b6cbcbab0435484abca2c55e7ae2595c21ea..73574255ba416d442b06e912af100cac8e5cfe4d 100644 (file)
--- a/foo.c
+++ b/foo.c
@@ -15,7 +15,7 @@ u8 i3;                //r21
 u8 n;          //r22
 u8 s;          //r23
 u8 _;          //r24
-u8 loop;       //r25
+               //r25
 u8 t;/*==Ml*/  //r26 (Xlo)
 u8 x;/*==Mh*/  //r27 (Xhi)
                //r28
@@ -67,6 +67,7 @@ void g(void) {
        BREQ    (skip)
        SUBI    (t, -8)
        skip:
+       //TODO: directly load address to mul_* routine and jump to it?
        t = data[t];
        /*MOV X_hi==x, data_hi
          MOV X_lo==t, data_lo
@@ -117,8 +118,6 @@ void g(void) {
                ADC (a2, i1, carry)
                LSR (a2)
                ROR (a1)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_69: // 0110 1001 (26cy)
                ADD (a1, i0)
@@ -144,8 +143,6 @@ void g(void) {
                ADC (a2, i1, carry)
                LSR (a2)
                ROR (a1)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_75: // 0111 0101 (28cy)
                ADD (a1, i0)
@@ -173,8 +170,6 @@ void g(void) {
                ADC (a2, i1, carry)
                LSR (a2)
                ROR (a1)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_84: // 1000 0100 (22cy)
                LSR (a2)
@@ -196,8 +191,6 @@ void g(void) {
                ROR (a1)
                ADD (a1, i0)
                ADC (a2, i1, carry)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_8c: // 1000 1100 (24cy)
                LSR (a2)
@@ -221,8 +214,6 @@ void g(void) {
                ROR (a1)
                ADD (a1, i0)
                ADC (a2, i1, carry)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_9d: // 1001 1101 (28cy)
                ADD (a1, i0)
@@ -250,8 +241,6 @@ void g(void) {
                ROR (a1)
                ADD (a1, i0)
                ADC (a2, i1, carry)
-               LSR (a2)
-               ROR (a1)
                RJMP    (endmul)
        mul_b0: // 1011 0000 (22cy)
                LSR (a2)
@@ -275,14 +264,14 @@ void g(void) {
                ROR (a1)
                ADD (a1, i0)
                ADC (a2, i1, carry)
-               LSR (a2)
-               ROR (a1)
        endmul:
+               LSR (a2) //final shift is a common operation for all
+               ROR (a1)
        // end MUL
+       MOV     (t, a1)
        #undef a0
        #undef a1
        #undef a2
-       MOV     (t, x)
        RET //TODO: replace CALL/RET with IJMP?
 };