bsv.c

   1 typedef unsigned char u8;
   2
   3 int i;
   4 u8 i0, i1, i2, i3;
   5
   6 u8 notes[] = {
   7         0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58,
   8         0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58
   9 };
  10
  11 u8 g(u8 x, u8 t, u8 o){
  12         u8 notes_ix = t & 0x7;
  13         if(3&i2)
  14                 notes_ix += 8;
  15         u8 result = (i*notes[notes_ix])>>o;
  16         result &= x;
  17         result &= 3;
  18         return result;
  19 }
  20 void main(void){
  21         i = 0;
  22         i0 = i1 = i2 = i3 = 0;
  23         for(;;) {
  24                 u8 sample;
  25                 u8 n = i2<<2 | i1>>6;
  26                 u8 s = i3<<7 | i2>>1;
  27
  28                 sample = g(1,n,12);
  29
  30                 { u8 tmp;
  31                   tmp = i2<<3 | i1>>5;
  32                   tmp ^= n;
  33                 sample += g(s,tmp,10);
  34                 } //tmp
  35
  36                 { u8 tmp1 = s/3;
  37                   u8 tmp2;
  38                   tmp2 = (i>>11)%3;
  39                   tmp2 += n;
  40                 sample += g(tmp1,tmp2,10);
  41                 } //tmp1, tmp2
  42
  43                 { u8 tmp1 = s/5;
  44                   u8 tmp2 = n;
  45                   { u8 tmp3 = (i>>10)%3;
  46                     tmp2 -= tmp3;
  47                   } // tmp3
  48                   tmp2 += 8;
  49                 sample += g(tmp1,tmp2,9);
  50                 } //tmp1, tmp2
  51
  52                 putchar(sample<<4);
  53
  54                 i++;
  55                 i0++;
  56                 i1 += !i0;
  57                 i2 += !i1 && !i0;
  58                 i3 += !i2 && !i1 && !i0;
  59         }
  60 }