new version

diff --git a/foo.c b/foo.c
index 1497b21174d209da4ed009e8111850ba7cd9d059..bc469c9b2327761579987537e5e50b7af537279e 100644 (file)
--- a/foo.c
+++ b/foo.c
@@ -6,6 +6,7 @@ u8 data[] = {
        0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58,
        0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58
 };
+u8 zero;
 u8 i0;
 u8 i1;
 u8 i2;
@@ -13,18 +14,26 @@ u8 i3;
 u8 x;
 u8 t;
 u8 o;
+u8 _;
 void g(void) {
        // g(i, x, t, o) -> t
-       u8 tmp;
+       #define tmp _
        ANDI    (t, 0x07)
        MOV     (tmp, i2)
        ANDI    (tmp, 3)
        TST     (tmp)
+       #undef tmp
        BREQ    (skip)
        SUBI    (t, -8)
        skip:
        t = data[t];
-       t = (((i1&0x1f)<<8|i0)*t)>>8 >> o;
+       /*MOV X_hi==_, data_hi
+         MOV X_lo==t, data_lo
+         ADD X_lo, t
+         CLR zero
+         ADC X_hi, zero
+         LD  t, X         */
+       t = (((i1&0x1f)<<8|i0)*t)>>8 >> o; //TODO; NOTE: o == {1, 2, 4}
        AND     (t, x)
        ANDI    (t, 3)
        RET
@@ -100,7 +109,7 @@ int main(void) {
                LSR     (tmp)
                 MOV    (x, tmp)
                #undef tmp
-               t = ((i3&0x01)<<13 | i2<<5 | i1>>3) % 3;
+               t = ((i3&0x01)<<13 | i2<<5 | i1>>3) % 3; //TODO
                ADD     (t, n)
                LDI     (o, 2)
                RCALL   g();
@@ -124,7 +133,7 @@ int main(void) {
                LSR     (tmp)
                 MOV    (x, tmp)
                #undef tmp
-               t = ((i3&0x01)<<14 | i2<<6 | i1>>2) % 3;
+               t = ((i3&0x01)<<14 | i2<<6 | i1>>2) % 3; //TODO
                SUB     (t, n)
                NEG     (t)
                SUBI    (t, -8)