new version
[Chiptunes.git] / foo.c
diff --git a/foo.c b/foo.c
index e70f5cf65e55cf8dd446b5e9bf24c5b3ead2fdf8..4caddeafebf85fbbbaa77418b9b04b33dcd090bd 100644 (file)
--- a/foo.c
+++ b/foo.c
@@ -31,13 +31,21 @@ void g(void) {
 };
 
 int main(void) {
-       unsigned short n;
-       unsigned short s;
+       u8 n;
+       u8 s;
        u8 acc;
        //TODO: clear all vars/registers
        for (;;) {
-               acc = 0;
-               n = (i2<<2 | i1>>6);
+               MOV     (n, i2)
+               LSL     (n)
+               LSL     (n)
+               #define tmp acc
+               MOV     (tmp, i1)
+               SWAP    (tmp)
+               ANDI    (tmp, 0x0f)
+               tmp >>= 2;
+               OR      (n, tmp)
+               #undef tmp
                s = (i3<<7 | i2>>1);
 
                //voice 1:
@@ -49,7 +57,18 @@ int main(void) {
 
                //voice 2:
                MOV     (x, s)
-               t = n ^ (i2<<3 | i1>>5);
+               #define tmp o
+               MOV     (tmp, i2)
+               LSL     (tmp)
+               LSL     (tmp)
+               LSL     (tmp)
+               MOV     (t, i1)
+               SWAP    (t)
+               ANDI    (t, 0xf)
+               LSR     (t)
+               OR      (t, tmp)
+               #undef tmp
+               EOR     (t, n)
                LDI     (o, 10)
                RCALL   g();
                ADD     (acc, t)
@@ -75,5 +94,6 @@ int main(void) {
                ADC     (i1, tmp, !i0)
                ADC     (i2, tmp, !i0&&!i1)
                ADC     (i3, tmp, !i0&&!i1&&!i2)
+               #undef tmp
        }
 }
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