+#ifdef __VAES__
+static const u32x16 ctr_inv_1234 = {
+ 0, 0, 0, 1 << 24, 0, 0, 0, 2 << 24, 0, 0, 0, 3 << 24, 0, 0, 0, 4 << 24,
+};
+
+static const u32x16 ctr_inv_4444 = {
+ 0, 0, 0, 4 << 24, 0, 0, 0, 4 << 24, 0, 0, 0, 4 << 24, 0, 0, 0, 4 << 24
+};
+
+static const u32x16 ctr_1234 = {
+ 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0,
+};
+
+static_always_inline void
+aes4_gcm_enc_first_round (u8x64 * r, aes_gcm_counter_t * ctr, u8x64 k, int n)
+{
+ u8 last_byte = (u8) ctr->counter;
+ int i = 0;
+
+ /* As counter is stored in network byte order for performance reasons we
+ are incrementing least significant byte only except in case where we
+ overlow. As we are processing four 512-blocks in parallel except the
+ last round, overflow can happen only when n == 4 */
+
+ if (n == 4)
+ for (; i < 2; i++)
+ {
+ r[i] = k ^ (u8x64) ctr->Y4;
+ ctr->Y4 += ctr_inv_4444;
+ }
+
+ if (n == 4 && PREDICT_TRUE (last_byte == 241))
+ {
+ u32x16 Yc, Yr = (u32x16) u8x64_reflect_u8x16 ((u8x64) ctr->Y4);
+
+ for (; i < n; i++)
+ {
+ r[i] = k ^ (u8x64) ctr->Y4;
+ Yc = u32x16_splat (ctr->counter + 4 * (i + 1)) + ctr_1234;
+ Yr = (u32x16) u32x16_mask_blend (Yr, Yc, 0x1111);
+ ctr->Y4 = (u32x16) u8x64_reflect_u8x16 ((u8x64) Yr);
+ }
+ }
+ else
+ {
+ for (; i < n; i++)
+ {
+ r[i] = k ^ (u8x64) ctr->Y4;
+ ctr->Y4 += ctr_inv_4444;
+ }
+ }
+ ctr->counter += n * 4;
+}
+
+static_always_inline void
+aes4_gcm_enc_round (u8x64 * r, u8x64 k, int n_blocks)
+{
+ for (int i = 0; i < n_blocks; i++)
+ r[i] = aes_enc_round_x4 (r[i], k);
+}
+
+static_always_inline void
+aes4_gcm_enc_last_round (u8x64 * r, u8x64 * d, u8x64 const *k,
+ int rounds, int n_blocks)
+{
+
+ /* additional ronuds for AES-192 and AES-256 */
+ for (int i = 10; i < rounds; i++)
+ aes4_gcm_enc_round (r, k[i], n_blocks);
+
+ for (int i = 0; i < n_blocks; i++)
+ d[i] ^= aes_enc_last_round_x4 (r[i], k[rounds]);
+}
+
+static_always_inline u8x16
+aes4_gcm_calc (u8x16 T, aes_gcm_key_data_t * kd, u8x64 * d,
+ aes_gcm_counter_t * ctr, u8x16u * in, u8x16u * out,
+ int rounds, int n, int last_4block_bytes, aes_gcm_flags_t f)
+{
+ ghash4_data_t _gd, *gd = &_gd;
+ const u8x64 *rk = (u8x64 *) kd->Ke4;
+ int i, ghash_blocks, gc = 1;
+ u8x64u *Hi4, *inv = (u8x64u *) in, *outv = (u8x64u *) out;
+ u8x64 r[4];
+ u64 byte_mask = _bextr_u64 (-1LL, 0, last_4block_bytes);
+
+ if (f & AES_GCM_F_ENCRYPT)
+ {
+ /* during encryption we either hash four 512-bit blocks from previous
+ round or we don't hash at all */
+ ghash_blocks = 4;
+ Hi4 = (u8x64u *) (kd->Hi + NUM_HI - ghash_blocks * 4);
+ }
+ else
+ {
+ /* during deccryption we hash 1..4 512-bit blocks from current round */
+ ghash_blocks = n;
+ int n_128bit_blocks = n * 4;
+ /* if this is last round of decryption, we may have less than 4
+ 128-bit blocks in the last 512-bit data block, so we need to adjust
+ Hi4 pointer accordingly */
+ if (f & AES_GCM_F_LAST_ROUND)
+ n_128bit_blocks += ((last_4block_bytes + 15) >> 4) - 4;
+ Hi4 = (u8x64u *) (kd->Hi + NUM_HI - n_128bit_blocks);
+ }
+
+ /* AES rounds 0 and 1 */
+ aes4_gcm_enc_first_round (r, ctr, rk[0], n);
+ aes4_gcm_enc_round (r, rk[1], n);
+
+ /* load 4 blocks of data - decrypt round */
+ if (f & AES_GCM_F_DECRYPT)
+ {
+ for (i = 0; i < n - ((f & AES_GCM_F_LAST_ROUND) != 0); i++)
+ d[i] = inv[i];
+
+ if (f & AES_GCM_F_LAST_ROUND)
+ d[i] = u8x64_mask_load (u8x64_splat (0), inv + i, byte_mask);
+ }
+
+ /* GHASH multiply block 0 */
+ if (f & AES_GCM_F_WITH_GHASH)
+ ghash4_mul_first (gd, u8x64_reflect_u8x16 (d[0]) ^
+ u8x64_insert_u8x16 (u8x64_splat (0), T, 0), Hi4[0]);
+
+ /* AES rounds 2 and 3 */
+ aes4_gcm_enc_round (r, rk[2], n);
+ aes4_gcm_enc_round (r, rk[3], n);
+
+ /* GHASH multiply block 1 */
+ if ((f & AES_GCM_F_WITH_GHASH) && gc++ < ghash_blocks)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[1]), Hi4[1]);
+
+ /* AES rounds 4 and 5 */
+ aes4_gcm_enc_round (r, rk[4], n);
+ aes4_gcm_enc_round (r, rk[5], n);
+
+ /* GHASH multiply block 2 */
+ if ((f & AES_GCM_F_WITH_GHASH) && gc++ < ghash_blocks)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[2]), Hi4[2]);
+
+ /* AES rounds 6 and 7 */
+ aes4_gcm_enc_round (r, rk[6], n);
+ aes4_gcm_enc_round (r, rk[7], n);
+
+ /* GHASH multiply block 3 */
+ if ((f & AES_GCM_F_WITH_GHASH) && gc++ < ghash_blocks)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[3]), Hi4[3]);
+
+ /* load 4 blocks of data - decrypt round */
+ if (f & AES_GCM_F_ENCRYPT)
+ {
+ for (i = 0; i < n - ((f & AES_GCM_F_LAST_ROUND) != 0); i++)
+ d[i] = inv[i];
+
+ if (f & AES_GCM_F_LAST_ROUND)
+ d[i] = u8x64_mask_load (u8x64_splat (0), inv + i, byte_mask);
+ }
+
+ /* AES rounds 8 and 9 */
+ aes4_gcm_enc_round (r, rk[8], n);
+ aes4_gcm_enc_round (r, rk[9], n);
+
+ /* AES last round(s) */
+ aes4_gcm_enc_last_round (r, d, rk, rounds, n);
+
+ /* store 4 blocks of data */
+ for (i = 0; i < n - ((f & AES_GCM_F_LAST_ROUND) != 0); i++)
+ outv[i] = d[i];
+
+ if (f & AES_GCM_F_LAST_ROUND)
+ u8x64_mask_store (d[i], outv + i, byte_mask);
+
+ /* GHASH reduce 1st step */
+ ghash4_reduce (gd);
+
+ /* GHASH reduce 2nd step */
+ ghash4_reduce2 (gd);
+
+ /* GHASH final step */
+ return ghash4_final (gd);
+}
+
+static_always_inline u8x16
+aes4_gcm_calc_double (u8x16 T, aes_gcm_key_data_t * kd, u8x64 * d,
+ aes_gcm_counter_t * ctr, u8x16u * in, u8x16u * out,
+ int rounds, aes_gcm_flags_t f)
+{
+ u8x64 r[4];
+ ghash4_data_t _gd, *gd = &_gd;
+ const u8x64 *rk = (u8x64 *) kd->Ke4;
+ u8x64 *Hi4 = (u8x64 *) (kd->Hi + NUM_HI - 32);
+ u8x64u *inv = (u8x64u *) in, *outv = (u8x64u *) out;
+
+ /* AES rounds 0 and 1 */
+ aes4_gcm_enc_first_round (r, ctr, rk[0], 4);
+ aes4_gcm_enc_round (r, rk[1], 4);
+
+ /* load 4 blocks of data - decrypt round */
+ if (f & AES_GCM_F_DECRYPT)
+ for (int i = 0; i < 4; i++)
+ d[i] = inv[i];
+
+ /* GHASH multiply block 0 */
+ ghash4_mul_first (gd, u8x64_reflect_u8x16 (d[0]) ^
+ u8x64_insert_u8x16 (u8x64_splat (0), T, 0), Hi4[0]);
+
+ /* AES rounds 2 and 3 */
+ aes4_gcm_enc_round (r, rk[2], 4);
+ aes4_gcm_enc_round (r, rk[3], 4);
+
+ /* GHASH multiply block 1 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[1]), Hi4[1]);
+
+ /* AES rounds 4 and 5 */
+ aes4_gcm_enc_round (r, rk[4], 4);
+ aes4_gcm_enc_round (r, rk[5], 4);
+
+ /* GHASH multiply block 2 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[2]), Hi4[2]);
+
+ /* AES rounds 6 and 7 */
+ aes4_gcm_enc_round (r, rk[6], 4);
+ aes4_gcm_enc_round (r, rk[7], 4);
+
+ /* GHASH multiply block 3 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[3]), Hi4[3]);
+
+ /* AES rounds 8 and 9 */
+ aes4_gcm_enc_round (r, rk[8], 4);
+ aes4_gcm_enc_round (r, rk[9], 4);
+
+ /* load 4 blocks of data - encrypt round */
+ if (f & AES_GCM_F_ENCRYPT)
+ for (int i = 0; i < 4; i++)
+ d[i] = inv[i];
+
+ /* AES last round(s) */
+ aes4_gcm_enc_last_round (r, d, rk, rounds, 4);
+
+ /* store 4 blocks of data */
+ for (int i = 0; i < 4; i++)
+ outv[i] = d[i];
+
+ /* load 4 blocks of data - decrypt round */
+ if (f & AES_GCM_F_DECRYPT)
+ for (int i = 0; i < 4; i++)
+ d[i] = inv[i + 4];
+
+ /* GHASH multiply block 3 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[0]), Hi4[4]);
+
+ /* AES rounds 0 and 1 */
+ aes4_gcm_enc_first_round (r, ctr, rk[0], 4);
+ aes4_gcm_enc_round (r, rk[1], 4);
+
+ /* GHASH multiply block 5 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[1]), Hi4[5]);
+
+ /* AES rounds 2 and 3 */
+ aes4_gcm_enc_round (r, rk[2], 4);
+ aes4_gcm_enc_round (r, rk[3], 4);
+
+ /* GHASH multiply block 6 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[2]), Hi4[6]);
+
+ /* AES rounds 4 and 5 */
+ aes4_gcm_enc_round (r, rk[4], 4);
+ aes4_gcm_enc_round (r, rk[5], 4);
+
+ /* GHASH multiply block 7 */
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[3]), Hi4[7]);
+
+ /* AES rounds 6 and 7 */
+ aes4_gcm_enc_round (r, rk[6], 4);
+ aes4_gcm_enc_round (r, rk[7], 4);
+
+ /* GHASH reduce 1st step */
+ ghash4_reduce (gd);
+
+ /* AES rounds 8 and 9 */
+ aes4_gcm_enc_round (r, rk[8], 4);
+ aes4_gcm_enc_round (r, rk[9], 4);
+
+ /* GHASH reduce 2nd step */
+ ghash4_reduce2 (gd);
+
+ /* load 4 blocks of data - encrypt round */
+ if (f & AES_GCM_F_ENCRYPT)
+ for (int i = 0; i < 4; i++)
+ d[i] = inv[i + 4];
+
+ /* AES last round(s) */
+ aes4_gcm_enc_last_round (r, d, rk, rounds, 4);
+
+ /* store 4 blocks of data */
+ for (int i = 0; i < 4; i++)
+ outv[i + 4] = d[i];
+
+ /* GHASH final step */
+ return ghash4_final (gd);
+}
+
+static_always_inline u8x16
+aes4_gcm_ghash_last (u8x16 T, aes_gcm_key_data_t * kd, u8x64 * d,
+ int n, int last_4block_bytes)
+{
+ ghash4_data_t _gd, *gd = &_gd;
+ u8x64u *Hi4;
+ int n_128bit_blocks;
+ u64 byte_mask = _bextr_u64 (-1LL, 0, last_4block_bytes);
+ n_128bit_blocks = (n - 1) * 4 + ((last_4block_bytes + 15) >> 4);
+ Hi4 = (u8x64u *) (kd->Hi + NUM_HI - n_128bit_blocks);
+
+ d[n - 1] = u8x64_mask_blend (u8x64_splat (0), d[n - 1], byte_mask);
+ ghash4_mul_first (gd, u8x64_reflect_u8x16 (d[0]) ^
+ u8x64_insert_u8x16 (u8x64_splat (0), T, 0), Hi4[0]);
+ if (n > 1)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[1]), Hi4[1]);
+ if (n > 2)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[2]), Hi4[2]);
+ if (n > 3)
+ ghash4_mul_next (gd, u8x64_reflect_u8x16 (d[3]), Hi4[3]);
+ ghash4_reduce (gd);
+ ghash4_reduce2 (gd);
+ return ghash4_final (gd);
+}
+#endif