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#ifdef TFM_SQR4
void fp_sqr_comba4(fp_int *A, fp_int *B)
{
fp_digit *a, b[8], c0, c1, c2, sc0, sc1, sc2;
a = A->dp;
COMBA_START;
/* clear carries */
CLEAR_CARRY;
/* output 0 */
SQRADD(a[0],a[0]);
COMBA_STORE(b[0]);
/* output 1 */
CARRY_FORWARD;
SQRADD2(a[0], a[1]);
COMBA_STORE(b[1]);
/* output 2 */
CARRY_FORWARD;
SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]);
COMBA_STORE(b[2]);
/* output 3 */
CARRY_FORWARD;
SQRADD2(a[0], a[3]); SQRADD2(a[1], a[2]);
COMBA_STORE(b[3]);
/* output 4 */
CARRY_FORWARD;
SQRADD2(a[1], a[3]); SQRADD(a[2], a[2]);
COMBA_STORE(b[4]);
/* output 5 */
CARRY_FORWARD;
SQRADD2(a[2], a[3]);
COMBA_STORE(b[5]);
/* output 6 */
CARRY_FORWARD;
SQRADD(a[3], a[3]);
COMBA_STORE(b[6]);
COMBA_STORE2(b[7]);
COMBA_FINI;
B->used = 8;
B->sign = FP_ZPOS;
memcpy(B->dp, b, 8 * sizeof(fp_digit));
fp_clamp(B);
}
#endif
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