Converts four packed 8-bit signed char values in vs to four 8.24 fixed-point integer values in vd.

Usage:

vc2i.s vd.q, vs.s
{
  vd.q[0] = ((vs.s[0]      ) & 0xff) << 24;
  vd.q[1] = ((vs.s[0] >>  8) & 0xff) << 24;
  vd.q[2] = ((vs.s[0] >> 16) & 0xff) << 24;
  vd.q[3] = ((vs.s[0] >> 24) & 0xff) << 24; 
}