X-Git-Url: https://git.gir.st/Chiptunes.git/blobdiff_plain/80b19f39caeebd8c3bd20211e6a40544793e32b7..e4f7baf085f9080e41d12d4a5166e3fde0135da5:/foo.c

diff --git a/foo.c b/foo.c
index 1840698..c8eacff 100644
--- a/foo.c
+++ b/foo.c
@@ -24,7 +24,7 @@ void g(void) {
 	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
@@ -83,15 +83,27 @@ int main(void) {
 		ADD	(acc, t)
 
 		//voice 3:
-		x = s / 3;
-		t = n + (((i3&0x01)<<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:
-		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)