f (unsigned short Z[48])
{
int j;
unsigned short t1, t2, t3, T[48];
unsigned short *p = T + 48;
for (j = 1; j < 8; j++)
t1 = *Z++;
*--p = *Z++;
*--p = t1;
t1 = inv(*Z++);
t2 = -*Z++;
t3 = -*Z++;
*--p = inv(*Z++);
*--p = t2;
*--p = t3;
}