X-Git-Url: https://git.gir.st/Chiptunes.git/blobdiff_plain/dd7bbc4a66af2f81e87af5c1b4c1f48c96275f46..e389879f63ee13e638364da4a624a1b3d137f8a5:/foo.c

diff --git a/foo.c b/foo.c
index 77e9f65..6c1e738 100644
--- a/foo.c
+++ b/foo.c
@@ -36,9 +36,26 @@ int main(void) {
 	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)
@@ -49,7 +66,18 @@ 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)