hi0bits
*bits = 4*P + 8 - k - hi0bits(word0(d) & Frac_mask);
*bits = 32*i - hi0bits(x[i-1]);
*bits = (i+2)*16 - hi0bits(x[i]);
if ( (j = 11 - hi0bits(word0(d2) & Frac_mask)) )
if ( (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f) )
if ( (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0xf) )
k = hi0bits(y);