From 268e276ed1a211a13afbf284de6f0731001d1ce5 Mon Sep 17 00:00:00 2001
From: Tobias Girstmair <tobi@isticktoit.net>
Date: Thu, 4 Mar 2021 01:17:02 +0100
Subject: [PATCH 1/1] new version

---
 bsv.c | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/bsv.c b/bsv.c
index 6a8deeb..5a222a7 100644
--- a/bsv.c
+++ b/bsv.c
@@ -1,21 +1,19 @@
 typedef unsigned char u8;
 
-u8 i0, i1, i2;
+u8 i0, i1, i2; //MEM
+u8 acc; //ACC
 
 u8 notes[] = {
 	0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58,
 	0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58
 };
 
-u8 g(u8 x, u8 t, u8 o){
+void g(u8 t){
 	u8 notes_ix = t & 0x7;
 	if(3&i2)
 		notes_ix += 8;
 	u8 result = ((i1<<8|i0)*notes[notes_ix])>>8;  // keep hi byte
-	result >>= o;
-	result &= x;
-	result &= 3;
-	return result;
+	acc = result;
 }
 void main(void){
 	i0 = i1 = i2 = 0;
@@ -24,19 +22,28 @@ void main(void){
 		u8 n = i2<<2 | i1>>6;
 		u8 s = i2>>1;
 
-		sample = g(1,n,4);
+		g(n);
+		acc >>= 4;
+		acc &= 1&3;
+		sample = acc;
 
 		{ u8 tmp;
 		  tmp = i2<<3 | i1>>5;
 		  tmp ^= n;
-		sample += g(s,tmp,2);
+		g(tmp);
+		acc >>= 2;
+		acc &= s&3;
+		sample += acc;
 		} //tmp
 
 		{ u8 tmp1 = s/3;
 		  u8 tmp2;
 		  tmp2 = (i2<<5|i1>>3)%3;
 		  tmp2 += n;
-		sample += g(tmp1,tmp2,2);
+		g(tmp2);
+		acc >>= 2;
+		acc &= tmp1&3;
+		sample += acc;
 		} //tmp1, tmp2
 
 		{ u8 tmp1 = s/5;
@@ -45,7 +52,10 @@ void main(void){
 		    tmp2 -= tmp3;
 		  } // tmp3
 		  tmp2 += 8;
-		sample += g(tmp1,tmp2,1);
+		g(tmp2);
+		acc >>= 1;
+		acc &= tmp1&3;
+		sample += acc;
 		} //tmp1, tmp2
 
 		putchar(sample<<4);
-- 
2.39.3