new version

[Chiptunes.git] / foo.c

diff --git a/foo.c b/foo.c
index e70f5cf65e55cf8dd446b5e9bf24c5b3ead2fdf8..c8eacfffa85f8c2a74a08e5298305192b0542924 100644 (file)
--- a/foo.c
+++ b/foo.c
@@ -24,21 +24,38 @@ void g(void) {
        SUBI    (t, -8)
        skip:
        t = data[t];
        SUBI    (t, -8)
        skip:
        t = data[t];

-       t = ((i3<<24|i2<<16|i1<<8|i0)*t) >> o;
+       t = (((i1&0x1f)<<8|i0)*t) >> o;

        AND     (t, x)
        ANDI    (t, 3)
        RET
 };
 
 int main(void) {
        AND     (t, x)
        ANDI    (t, 3)
        RET
 };
 
 int main(void) {

-       unsigned short n;
-       unsigned short s;
+       u8 n;
+       u8 s;

        u8 acc;
        //TODO: clear all vars/registers
        for (;;) {
        u8 acc;
        //TODO: clear all vars/registers
        for (;;) {

-               acc = 0;
-               n = (i2<<2 | i1>>6);
-               s = (i3<<7 | i2>>1);
+               MOV     (n, i2)
+               LSL     (n)
+               LSL     (n)
+               #define tmp acc
+               MOV     (tmp, i1)
+               SWAP    (tmp)
+               ANDI    (tmp, 0x0f)
+               LSR     (tmp)
+               LSR     (tmp)
+               OR      (n, tmp)
+               #undef tmp
+               MOV     (s, i3)
+               ROR     (s)
+               ROR     (s)
+               ANDI    (s, 0x80)
+               #define tmp acc
+               MOV     (tmp, i2)
+               LSR     (tmp)
+               OR      (s, tmp)
+               #undef tmp

 
                //voice 1:
                LDI     (x, 1)
 
                //voice 1:
                LDI     (x, 1)


@@ -49,21 +66,44 @@ int main(void) {
 
                //voice 2:
                MOV     (x, s)
 
                //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)
 
                //voice 3:
                LDI     (o, 10)
                RCALL   g();
                ADD     (acc, t)
 
                //voice 3:

-               x = s / 3;
-               t = n + ((i3<<13 | i2<<5 | i1>>3) % 3);
+               MOV     (x, s)
+               INC     (x)
+               #define tmp o
+               x = (x*0x55)>>8;
+               #undef tmp
+               t = ((i3&0x01)<<13 | i2<<5 | i1>>3) % 3;
+               ADD     (t, n)

                LDI     (o, 10)
                RCALL   g();
                ADD     (acc, t)
 
                //voice 4:
                LDI     (o, 10)
                RCALL   g();
                ADD     (acc, t)
 
                //voice 4:

-               x = s / 5;
-               t = 8 + n - ((i3<<14 | i2<<6 | i1>>2) % 3);
+               MOV     (x, s)
+               INC     (x)
+               #define tmp o
+               x = (x*0x33)>>8;
+               #undef tmp
+               t = ((i3&0x01)<<14 | i2<<6 | i1>>2) % 3;
+               SUB     (t, n)
+               NEG     (t)
+               SUBI    (t, -8)

                LDI     (o, 9)
                RCALL   g();
                ADD     (acc, t)
                LDI     (o, 9)
                RCALL   g();
                ADD     (acc, t)


@@ -75,5 +115,6 @@ int main(void) {
                ADC     (i1, tmp, !i0)
                ADC     (i2, tmp, !i0&&!i1)
                ADC     (i3, tmp, !i0&&!i1&&!i2)
                ADC     (i1, tmp, !i0)
                ADC     (i2, tmp, !i0&&!i1)
                ADC     (i3, tmp, !i0&&!i1&&!i2)

+               #undef tmp

        }
 }
        }
 }