From 57e8e85be6342b9495eb7ba9a3d96e508b984418 Mon Sep 17 00:00:00 2001
From: lloyd <lloyd@randombit.net>
Date: Tue, 9 Sep 2008 22:27:16 +0000
Subject: Add 16x16->32 word Comba multiply and square

---
 src/mp_comba.cpp | 762 ++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 649 insertions(+), 113 deletions(-)

(limited to 'src/mp_comba.cpp')

diff --git a/src/mp_comba.cpp b/src/mp_comba.cpp
index 589a4037c..635a7547a 100644
--- a/src/mp_comba.cpp
+++ b/src/mp_comba.cpp
@@ -10,6 +10,39 @@ namespace Botan {
 
 extern "C" {
 
+/*************************************************
+* Comba 4x4 Squaring                             *
+*************************************************/
+void bigint_comba_sqr4(word z[8], const word x[4])
+   {
+   word w2 = 0, w1 = 0, w0 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
+   z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
+   z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
+   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
+   z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
+   z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
+   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
+   z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
+   z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
+   z[6] = w0;
+   z[7] = w1;
+   }
+
 /*************************************************
 * Comba 4x4 Multiplication                       *
 *************************************************/
@@ -49,6 +82,58 @@ void bigint_comba_mul4(word z[8], const word x[4], const word y[4])
    z[7] = w1;
    }
 
+/*************************************************
+* Comba 6x6 Squaring                             *
+*************************************************/
+void bigint_comba_sqr6(word z[12], const word x[6])
+   {
+   word w2 = 0, w1 = 0, w0 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
+   z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
+   z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
+   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
+   z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
+   z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[4]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
+   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
+   z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[4]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
+   z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[4]);
+   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
+   z[6] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[4]);
+   z[7] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[5]);
+   word3_muladd(&w2, &w1, &w0, x[4], x[4]);
+   z[8] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[4], x[5]);
+   z[9] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[5], x[5]);
+   z[10] = w0;
+   z[11] = w1;
+   }
+
 /*************************************************
 * Comba 6x6 Multiplication                       *
 *************************************************/
@@ -116,6 +201,81 @@ void bigint_comba_mul6(word z[12], const word x[6], const word y[6])
    z[11] = w1;
    }
 
+/*************************************************
+* Comba 8x8 Squaring                             *
+*************************************************/
+void bigint_comba_sqr8(word z[16], const word x[8])
+   {
+   word w2 = 0, w1 = 0, w0 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
+   z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
+   z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
+   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
+   z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
+   z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[4]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
+   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
+   z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[4]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
+   z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[6]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[4]);
+   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
+   z[6] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[0], x[7]);
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[6]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[5]);
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[4]);
+   z[7] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[1], x[7]);
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[6]);
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[5]);
+   word3_muladd(&w2, &w1, &w0, x[4], x[4]);
+   z[8] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[2], x[7]);
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[6]);
+   word3_muladd_2(&w2, &w1, &w0, x[4], x[5]);
+   z[9] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[3], x[7]);
+   word3_muladd_2(&w2, &w1, &w0, x[4], x[6]);
+   word3_muladd(&w2, &w1, &w0, x[5], x[5]);
+   z[10] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[4], x[7]);
+   word3_muladd_2(&w2, &w1, &w0, x[5], x[6]);
+   z[11] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[5], x[7]);
+   word3_muladd(&w2, &w1, &w0, x[6], x[6]);
+   z[12] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[6], x[7]);
+   z[13] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[7], x[7]);
+   z[14] = w0;
+   z[15] = w1;
+   }
+
 /*************************************************
 * Comba 8x8 Multiplication                       *
 *************************************************/
@@ -220,163 +380,539 @@ void bigint_comba_mul8(word z[16], const word x[8], const word y[8])
    }
 
 /*************************************************
-* Comba 4x4 Squaring                             *
+* Comba 16x16 Squaring                           *
 *************************************************/
-void bigint_comba_sqr4(word z[8], const word x[4])
+void bigint_comba_sqr16(word z[32], const word x[16])
    {
-   word w2 = 0, w1 = 0, w0 = 0;
-
-   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
-   z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
+   return bigint_comba_mul16(z, x, x);
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
-   z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
-   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
-   z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
-   z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
-   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
-   z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
-   z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
-   z[6] = w0;
-   z[7] = w1;
-   }
-
-/*************************************************
-* Comba 6x6 Squaring                             *
-*************************************************/
-void bigint_comba_sqr6(word z[12], const word x[6])
-   {
    word w2 = 0, w1 = 0, w0 = 0;
 
-   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
-   z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
-   z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
-   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
-   z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
-   z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[4]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
-   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
-   z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[4]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
-   z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
-
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[4]);
-   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
-   z[6] = w0; w0 = w1; w1 = w2; w2 = 0;
+   word3_muladd(&w2, &w1, &w0, x[ 0], x[ 0]);
+   z[ 0] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 1]);
+   z[ 1] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], x[ 1]);
+   z[ 2] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 3]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 2]);
+   z[ 3] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 4]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], x[ 2]);
+   z[ 4] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 5]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 4]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 3]);
+   z[ 5] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 6]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 5]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], x[ 3]);
+   z[ 6] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 7]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 6]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 5]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 4]);
+   z[ 7] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 7]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 6]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], x[ 4]);
+   z[ 8] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 7]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 6]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[ 5]);
+   z[ 9] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 7]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], x[ 5]);
+   z[10] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[4]);
-   z[7] = w0; w0 = w1; w1 = w2; w2 = 0;
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[ 7]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[ 6]);
+   z[11] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[5]);
-   word3_muladd(&w2, &w1, &w0, x[4], x[4]);
-   z[8] = w0; w0 = w1; w1 = w2; w2 = 0;
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], x[ 6]);
+   z[12] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[4], x[5]);
-   z[9] = w0; w0 = w1; w1 = w2; w2 = 0;
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[ 8]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[ 7]);
+   z[13] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd(&w2, &w1, &w0, x[5], x[5]);
-   z[10] = w0;
-   z[11] = w1;
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], x[ 7]);
+   z[14] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 0], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[ 9]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[ 8]);
+   z[15] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 1], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], x[ 8]);
+   z[16] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 2], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[10]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[ 9]);
+   z[17] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 3], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], x[ 9]);
+   z[18] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 4], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[11]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[10]);
+   z[19] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 5], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[11]);
+   word3_muladd(&w2, &w1, &w0, x[10], x[10]);
+   z[20] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 6], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[12]);
+   word3_muladd_2(&w2, &w1, &w0, x[10], x[11]);
+   z[21] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 7], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[10], x[12]);
+   word3_muladd(&w2, &w1, &w0, x[11], x[11]);
+   z[22] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 8], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[10], x[13]);
+   word3_muladd_2(&w2, &w1, &w0, x[11], x[12]);
+   z[23] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[ 9], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[10], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[11], x[13]);
+   word3_muladd(&w2, &w1, &w0, x[12], x[12]);
+   z[24] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[10], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[11], x[14]);
+   word3_muladd_2(&w2, &w1, &w0, x[12], x[13]);
+   z[25] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[11], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[12], x[14]);
+   word3_muladd(&w2, &w1, &w0, x[13], x[13]);
+   z[26] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[12], x[15]);
+   word3_muladd_2(&w2, &w1, &w0, x[13], x[14]);
+   z[27] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[13], x[15]);
+   word3_muladd(&w2, &w1, &w0, x[14], x[14]);
+   z[28] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd_2(&w2, &w1, &w0, x[14], x[15]);
+   z[29] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[15], x[15]);
+   z[30] = w0;
+   z[31] = w1;
    }
 
 /*************************************************
-* Comba 8x8 Squaring                             *
+* Comba 16x16 Multiplication                     *
 *************************************************/
-void bigint_comba_sqr8(word z[16], const word x[8])
+void bigint_comba_mul16(word z[32], const word x[16], const word y[16])
    {
    word w2 = 0, w1 = 0, w0 = 0;
 
-   word3_muladd(&w2, &w1, &w0, x[0], x[0]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 0]);
    z[0] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[1]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 0]);
    z[1] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[2]);
-   word3_muladd(&w2, &w1, &w0, x[1], x[1]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 0]);
    z[2] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[3]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[2]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 0]);
    z[3] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[4]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[3]);
-   word3_muladd(&w2, &w1, &w0, x[2], x[2]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 0]);
    z[4] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[4]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[3]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 0]);
    z[5] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[6]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[4]);
-   word3_muladd(&w2, &w1, &w0, x[3], x[3]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 0]);
    z[6] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[0], x[7]);
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[6]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[5]);
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[4]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 0]);
    z[7] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[1], x[7]);
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[6]);
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[5]);
-   word3_muladd(&w2, &w1, &w0, x[4], x[4]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 0]);
    z[8] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[2], x[7]);
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[6]);
-   word3_muladd_2(&w2, &w1, &w0, x[4], x[5]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 0]);
    z[9] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[3], x[7]);
-   word3_muladd_2(&w2, &w1, &w0, x[4], x[6]);
-   word3_muladd(&w2, &w1, &w0, x[5], x[5]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 0]);
    z[10] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[4], x[7]);
-   word3_muladd_2(&w2, &w1, &w0, x[5], x[6]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 0]);
    z[11] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[5], x[7]);
-   word3_muladd(&w2, &w1, &w0, x[6], x[6]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 0]);
    z[12] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd_2(&w2, &w1, &w0, x[6], x[7]);
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 0]);
    z[13] = w0; w0 = w1; w1 = w2; w2 = 0;
 
-   word3_muladd(&w2, &w1, &w0, x[7], x[7]);
-   z[14] = w0;
-   z[15] = w1;
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 0]);
+   z[14] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 0], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 1]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 0]);
+   z[15] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 1], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 2]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 1]);
+   z[16] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 2], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 3]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 2]);
+   z[17] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 3], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 4]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 3]);
+   z[18] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 4], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 5]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 4]);
+   z[19] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 5], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 6]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 5]);
+   z[20] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 6], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 7]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 6]);
+   z[21] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 7], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 8]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 7]);
+   z[22] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 8], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[ 9]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 8]);
+   z[23] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[ 9], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[10], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[10]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[ 9]);
+   z[24] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[10], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[11], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[11]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[10]);
+   z[25] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[11], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[12], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[12]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[11]);
+   z[26] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[12], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[13], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[13]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[12]);
+   z[27] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[13], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[14], y[14]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[13]);
+   z[28] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[14], y[15]);
+   word3_muladd(&w2, &w1, &w0, x[15], y[14]);
+   z[29] = w0; w0 = w1; w1 = w2; w2 = 0;
+
+   word3_muladd(&w2, &w1, &w0, x[15], y[15]);
+   z[30] = w0;
+   z[31] = w1;
    }
 
 }
-- 
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