int32_t a1;
int32_t b1;
int32_t c1;
int32_t d1;

int32_t a2;
int32_t b2;
int32_t c2;
int32_t d2;

int32_t x;
int32_t y;

int32_t selectbase;
int32_t select1;
int32_t select2;
selectbase = ((inlet_s >> 24));
select1 = (selectbase * param_jump) & 3;
select2 = ((selectbase + 1) * param_jump) & 3;

switch (int(select1) > 0 ? select1 : 0) {
case 0:
  a1 = inlet_i0, b1 = inlet_i1, c1 = inlet_i2, d1 = inlet_i3;
  break;
case 1:
  a1 = inlet_i1, b1 = inlet_i2, c1 = inlet_i3, d1 = inlet_i0;
  break;
case 2:
  a1 = inlet_i2, b1 = inlet_i3, c1 = inlet_i0, d1 = inlet_i1;
  break;
case 3:
  a1 = inlet_i3, b1 = inlet_i0, c1 = inlet_i1, d1 = inlet_i2;
  break;
default:
  a1 = inlet_i0, b1 = inlet_i1, c1 = inlet_i2, d1 = inlet_i3;
  break;
}

switch (int(select2) > 0 ? select2 : 0) {
case 0:
  a2 = inlet_i0, b2 = inlet_i1, c2 = inlet_i2, d2 = inlet_i3;
  break;
case 1:
  a2 = inlet_i1, b2 = inlet_i2, c2 = inlet_i3, d2 = inlet_i0;
  break;
case 2:
  a2 = inlet_i2, b2 = inlet_i3, c2 = inlet_i0, d2 = inlet_i1;
  break;
case 3:
  a2 = inlet_i3, b2 = inlet_i0, c2 = inlet_i1, d2 = inlet_i2;
  break;

default:
  a2 = inlet_i0, b2 = inlet_i1, c2 = inlet_i2, d2 = inlet_i3;
  break;
}

x = inlet_s - ((inlet_s >> 24) << 24);
y = (1 << 24) - x;

outlet_o0 = ___SMMUL(y << 4, a1 << 4) + ___SMMUL(x << 4, a2 << 4);
outlet_o1 = ___SMMUL(y << 4, b1 << 4) + ___SMMUL(x << 4, b2 << 4);
outlet_o2 = ___SMMUL(y << 4, c1 << 4) + ___SMMUL(x << 4, c2 << 4);
outlet_o3 = ___SMMUL(y << 4, d1 << 4) + ___SMMUL(x << 4, d2 << 4);