/**
 * Author......: See docs/credits.txt
 * License.....: MIT
 */

#define NEW_SIMD_CODE

#ifdef KERNEL_STATIC
#include M2S(INCLUDE_PATH/inc_vendor.h)
#include M2S(INCLUDE_PATH/inc_types.h)
#include M2S(INCLUDE_PATH/inc_platform.cl)
#include M2S(INCLUDE_PATH/inc_common.cl)
#include M2S(INCLUDE_PATH/inc_simd.cl)
#include M2S(INCLUDE_PATH/inc_hash_sha512.cl)
#endif

DECLSPEC void sha512_transform_transport_vector (PRIVATE_AS const u64x *w0, PRIVATE_AS const u64x *w1, PRIVATE_AS const u64x *w2, PRIVATE_AS const u64x *w3, PRIVATE_AS u64x *digest)
{
  u32x t0[4];
  u32x t1[4];
  u32x t2[4];
  u32x t3[4];
  u32x t4[4];
  u32x t5[4];
  u32x t6[4];
  u32x t7[4];

  t0[0] = h32_from_64 (w0[0]);
  t0[1] = l32_from_64 (w0[0]);
  t0[2] = h32_from_64 (w0[1]);
  t0[3] = l32_from_64 (w0[1]);
  t1[0] = h32_from_64 (w0[2]);
  t1[1] = l32_from_64 (w0[2]);
  t1[2] = h32_from_64 (w0[3]);
  t1[3] = l32_from_64 (w0[3]);
  t2[0] = h32_from_64 (w1[0]);
  t2[1] = l32_from_64 (w1[0]);
  t2[2] = h32_from_64 (w1[1]);
  t2[3] = l32_from_64 (w1[1]);
  t3[0] = h32_from_64 (w1[2]);
  t3[1] = l32_from_64 (w1[2]);
  t3[2] = h32_from_64 (w1[3]);
  t3[3] = l32_from_64 (w1[3]);
  t4[0] = h32_from_64 (w2[0]);
  t4[1] = l32_from_64 (w2[0]);
  t4[2] = h32_from_64 (w2[1]);
  t4[3] = l32_from_64 (w2[1]);
  t5[0] = h32_from_64 (w2[2]);
  t5[1] = l32_from_64 (w2[2]);
  t5[2] = h32_from_64 (w2[3]);
  t5[3] = l32_from_64 (w2[3]);
  t6[0] = h32_from_64 (w3[0]);
  t6[1] = l32_from_64 (w3[0]);
  t6[2] = h32_from_64 (w3[1]);
  t6[3] = l32_from_64 (w3[1]);
  t7[0] = h32_from_64 (w3[2]);
  t7[1] = l32_from_64 (w3[2]);
  t7[2] = h32_from_64 (w3[3]);
  t7[3] = l32_from_64 (w3[3]);

  sha512_transform_vector (t0, t1, t2, t3, t4, t5, t6, t7, digest);
}

DECLSPEC void hmac_sha512_pad (PRIVATE_AS u32x *w0, PRIVATE_AS u32x *w1, PRIVATE_AS u32x *w2, PRIVATE_AS u32x *w3, PRIVATE_AS u64x *ipad, PRIVATE_AS u64x *opad)
{
  u64x w0_t[4];
  u64x w1_t[4];
  u64x w2_t[4];
  u64x w3_t[4];

  w0_t[0] = hl32_to_64 (w0[0], w0[1]) ^ make_u64x (0x3636363636363636UL);
  w0_t[1] = hl32_to_64 (w0[2], w0[3]) ^ make_u64x (0x3636363636363636UL);
  w0_t[2] = hl32_to_64 (w1[0], w1[1]) ^ make_u64x (0x3636363636363636UL);
  w0_t[3] = hl32_to_64 (w1[2], w1[3]) ^ make_u64x (0x3636363636363636UL);
  w1_t[0] = hl32_to_64 (w2[0], w2[1]) ^ make_u64x (0x3636363636363636UL);
  w1_t[1] = hl32_to_64 (w2[2], w2[3]) ^ make_u64x (0x3636363636363636UL);
  w1_t[2] = hl32_to_64 (w3[0], w3[1]) ^ make_u64x (0x3636363636363636UL);
  w1_t[3] = hl32_to_64 (w3[2], w3[3]) ^ make_u64x (0x3636363636363636UL);
  w2_t[0] =                             make_u64x (0x3636363636363636UL);
  w2_t[1] =                             make_u64x (0x3636363636363636UL);
  w2_t[2] =                             make_u64x (0x3636363636363636UL);
  w2_t[3] =                             make_u64x (0x3636363636363636UL);
  w3_t[0] =                             make_u64x (0x3636363636363636UL);
  w3_t[1] =                             make_u64x (0x3636363636363636UL);
  w3_t[2] =                             make_u64x (0x3636363636363636UL);
  w3_t[3] =                             make_u64x (0x3636363636363636UL);

  ipad[0] = SHA512M_A;
  ipad[1] = SHA512M_B;
  ipad[2] = SHA512M_C;
  ipad[3] = SHA512M_D;
  ipad[4] = SHA512M_E;
  ipad[5] = SHA512M_F;
  ipad[6] = SHA512M_G;
  ipad[7] = SHA512M_H;

  sha512_transform_transport_vector (w0_t, w1_t, w2_t, w3_t, ipad);

  w0_t[0] = hl32_to_64 (w0[0], w0[1]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w0_t[1] = hl32_to_64 (w0[2], w0[3]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w0_t[2] = hl32_to_64 (w1[0], w1[1]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w0_t[3] = hl32_to_64 (w1[2], w1[3]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w1_t[0] = hl32_to_64 (w2[0], w2[1]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w1_t[1] = hl32_to_64 (w2[2], w2[3]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w1_t[2] = hl32_to_64 (w3[0], w3[1]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w1_t[3] = hl32_to_64 (w3[2], w3[3]) ^ make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w2_t[0] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w2_t[1] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w2_t[2] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w2_t[3] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w3_t[0] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w3_t[1] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w3_t[2] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);
  w3_t[3] =                             make_u64x (0x5c5c5c5c5c5c5c5cUL);

  opad[0] = SHA512M_A;
  opad[1] = SHA512M_B;
  opad[2] = SHA512M_C;
  opad[3] = SHA512M_D;
  opad[4] = SHA512M_E;
  opad[5] = SHA512M_F;
  opad[6] = SHA512M_G;
  opad[7] = SHA512M_H;

  sha512_transform_transport_vector (w0_t, w1_t, w2_t, w3_t, opad);
}

DECLSPEC void hmac_sha512_run (PRIVATE_AS u32x *w0, PRIVATE_AS u32x *w1, PRIVATE_AS u32x *w2, PRIVATE_AS u32x *w3, PRIVATE_AS u64x *ipad, PRIVATE_AS u64x *opad, PRIVATE_AS u64x *digest)
{
  u64x w0_t[4];
  u64x w1_t[4];
  u64x w2_t[4];
  u64x w3_t[4];

  w0_t[0] = hl32_to_64 (w0[0], w0[1]);
  w0_t[1] = hl32_to_64 (w0[2], w0[3]);
  w0_t[2] = hl32_to_64 (w1[0], w1[1]);
  w0_t[3] = hl32_to_64 (w1[2], w1[3]);
  w1_t[0] = hl32_to_64 (w2[0], w2[1]);
  w1_t[1] = hl32_to_64 (w2[2], w2[3]);
  w1_t[2] = hl32_to_64 (w3[0], w3[1]);
  w1_t[3] = 0;
  w2_t[0] = 0;
  w2_t[1] = 0;
  w2_t[2] = 0;
  w2_t[3] = 0;
  w3_t[0] = 0;
  w3_t[1] = 0;
  w3_t[2] = 0;
  w3_t[3] = hl32_to_64 (w3[2], w3[3]);

  digest[0] = ipad[0];
  digest[1] = ipad[1];
  digest[2] = ipad[2];
  digest[3] = ipad[3];
  digest[4] = ipad[4];
  digest[5] = ipad[5];
  digest[6] = ipad[6];
  digest[7] = ipad[7];

  sha512_transform_transport_vector (w0_t, w1_t, w2_t, w3_t, digest);

  w0_t[0] = digest[0];
  w0_t[1] = digest[1];
  w0_t[2] = digest[2];
  w0_t[3] = digest[3];
  w1_t[0] = digest[4];
  w1_t[1] = digest[5];
  w1_t[2] = digest[6];
  w1_t[3] = digest[7];
  w2_t[0] = 0x8000000000000000UL;
  w2_t[1] = 0;
  w2_t[2] = 0;
  w2_t[3] = 0;
  w3_t[0] = 0;
  w3_t[1] = 0;
  w3_t[2] = 0;
  w3_t[3] = (128 + 64) * 8;

  digest[0] = opad[0];
  digest[1] = opad[1];
  digest[2] = opad[2];
  digest[3] = opad[3];
  digest[4] = opad[4];
  digest[5] = opad[5];
  digest[6] = opad[6];
  digest[7] = opad[7];

  sha512_transform_transport_vector (w0_t, w1_t, w2_t, w3_t, digest);
}

KERNEL_FQ KERNEL_FA void m01750_m04 (KERN_ATTR_BASIC ())
{
  /**
   * modifier
   */

  const u64 lid = get_local_id (0);

  /**
   * base
   */

  const u64 gid = get_global_id (0);

  if (gid >= GID_CNT) return;

  u32 pw_buf0[4];
  u32 pw_buf1[4];

  pw_buf0[0] = pws[gid].i[0];
  pw_buf0[1] = pws[gid].i[1];
  pw_buf0[2] = pws[gid].i[2];
  pw_buf0[3] = pws[gid].i[3];
  pw_buf1[0] = pws[gid].i[4];
  pw_buf1[1] = pws[gid].i[5];
  pw_buf1[2] = pws[gid].i[6];
  pw_buf1[3] = pws[gid].i[7];

  const u32 pw_l_len = pws[gid].pw_len & 63;

  /**
   * salt
   */

  u32 salt_buf0[4];
  u32 salt_buf1[4];
  u32 salt_buf2[4];
  u32 salt_buf3[4];

  salt_buf0[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 0]);
  salt_buf0[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 1]);
  salt_buf0[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 2]);
  salt_buf0[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 3]);
  salt_buf1[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 4]);
  salt_buf1[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 5]);
  salt_buf1[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 6]);
  salt_buf1[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 7]);
  salt_buf2[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 8]);
  salt_buf2[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 9]);
  salt_buf2[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[10]);
  salt_buf2[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[11]);
  salt_buf3[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[12]);
  salt_buf3[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[13]);
  salt_buf3[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[14]);
  salt_buf3[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[15]);

  const u32 salt_len = salt_bufs[SALT_POS_HOST].salt_len;

  /**
   * loop
   */

  for (u32 il_pos = 0; il_pos < IL_CNT; il_pos += VECT_SIZE)
  {
    const u32x pw_r_len = COMBS_PW_R_LEN (il_pos) & 63;

    const u32x pw_len = (pw_l_len + pw_r_len) & 63;

    /**
     * concat password candidate
     */

    u32x wordl0[4] = { 0 };
    u32x wordl1[4] = { 0 };
    u32x wordl2[4] = { 0 };
    u32x wordl3[4] = { 0 };

    wordl0[0] = pw_buf0[0];
    wordl0[1] = pw_buf0[1];
    wordl0[2] = pw_buf0[2];
    wordl0[3] = pw_buf0[3];
    wordl1[0] = pw_buf1[0];
    wordl1[1] = pw_buf1[1];
    wordl1[2] = pw_buf1[2];
    wordl1[3] = pw_buf1[3];

    u32x wordr0[4] = { 0 };
    u32x wordr1[4] = { 0 };
    u32x wordr2[4] = { 0 };
    u32x wordr3[4] = { 0 };

    #if ATTACK_MODE == 12
    if (COMBS_IS_MIDDLE)
    {
      // -a 12 assembles five pieces in these two register sets: mask, base word, mask, second word,
      // mask. wordl is the accumulator and wordr carries one piece at a time. The piece behind the
      // last word is left in wordr, because the OR below already folds wordr in.
      //
      // Only the second word changes length from one amplifier item to the next. Every other offset
      // is a property of the mask, so those shifts are by a scalar and cost what the shift by
      // pw_l_len costs today.

      if (COMBS_PRE_LEN > 0)
      {
        switch_buffer_by_offset_le_VV (wordl0, wordl1, wordl2, wordl3, COMBS_PRE_LEN);

        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_PRE, wordr0, wordr1, wordr2, wordr3);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);
      }

      u32x comb_off = COMBS_PRE_LEN + pw_l_len;

      if (COMBS_MID_LEN > 0)
      {
        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_MID, wordr0, wordr1, wordr2, wordr3);

        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);

        comb_off += COMBS_MID_LEN;
      }

      if (COMBS_HAS_Q > 0)
      {
        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_WORD, wordr0, wordr1, wordr2, wordr3);

        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);

        comb_off += pwlenx_create_combp (combs_buf, il_pos, COMBS_PIECE_WORD);
      }

      combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_POST, wordr0, wordr1, wordr2, wordr3);

      if (COMBS_POST_LEN > 0) switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);
    }
    else
    #endif
    {
      wordr0[0] = ix_create_combt (combs_buf, il_pos, 0);
      wordr0[1] = ix_create_combt (combs_buf, il_pos, 1);
      wordr0[2] = ix_create_combt (combs_buf, il_pos, 2);
      wordr0[3] = ix_create_combt (combs_buf, il_pos, 3);
      wordr1[0] = ix_create_combt (combs_buf, il_pos, 4);
      wordr1[1] = ix_create_combt (combs_buf, il_pos, 5);
      wordr1[2] = ix_create_combt (combs_buf, il_pos, 6);
      wordr1[3] = ix_create_combt (combs_buf, il_pos, 7);

      if (COMBS_MODE == COMBINATOR_MODE_BASE_LEFT)
      {
        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, pw_l_len);
      }
      else
      {
        switch_buffer_by_offset_le_VV (wordl0, wordl1, wordl2, wordl3, pw_r_len);
      }
    }

    u32x w0[4];
    u32x w1[4];
    u32x w2[4];
    u32x w3[4];

    w0[0] = wordl0[0] | wordr0[0];
    w0[1] = wordl0[1] | wordr0[1];
    w0[2] = wordl0[2] | wordr0[2];
    w0[3] = wordl0[3] | wordr0[3];
    w1[0] = wordl1[0] | wordr1[0];
    w1[1] = wordl1[1] | wordr1[1];
    w1[2] = wordl1[2] | wordr1[2];
    w1[3] = wordl1[3] | wordr1[3];
    w2[0] = wordl2[0] | wordr2[0];
    w2[1] = wordl2[1] | wordr2[1];
    w2[2] = wordl2[2] | wordr2[2];
    w2[3] = wordl2[3] | wordr2[3];
    w3[0] = wordl3[0] | wordr3[0];
    w3[1] = wordl3[1] | wordr3[1];
    w3[2] = wordl3[2] | wordr3[2];
    w3[3] = wordl3[3] | wordr3[3];

    w0[0] = hc_swap32 (w0[0]);
    w0[1] = hc_swap32 (w0[1]);
    w0[2] = hc_swap32 (w0[2]);
    w0[3] = hc_swap32 (w0[3]);
    w1[0] = hc_swap32 (w1[0]);
    w1[1] = hc_swap32 (w1[1]);
    w1[2] = hc_swap32 (w1[2]);
    w1[3] = hc_swap32 (w1[3]);
    w2[0] = hc_swap32 (w2[0]);
    w2[1] = hc_swap32 (w2[1]);
    w2[2] = hc_swap32 (w2[2]);
    w2[3] = hc_swap32 (w2[3]);
    w3[0] = hc_swap32 (w3[0]);
    w3[1] = hc_swap32 (w3[1]);
    w3[2] = hc_swap32 (w3[2]);
    w3[3] = hc_swap32 (w3[3]);

    /**
     * pads
     */

    u64x ipad[8];
    u64x opad[8];

    hmac_sha512_pad (w0, w1, w2, w3, ipad, opad);

    w0[0] = salt_buf0[0];
    w0[1] = salt_buf0[1];
    w0[2] = salt_buf0[2];
    w0[3] = salt_buf0[3];
    w1[0] = salt_buf1[0];
    w1[1] = salt_buf1[1];
    w1[2] = salt_buf1[2];
    w1[3] = salt_buf1[3];
    w2[0] = salt_buf2[0];
    w2[1] = salt_buf2[1];
    w2[2] = salt_buf2[2];
    w2[3] = salt_buf2[3];
    w3[0] = salt_buf3[0];
    w3[1] = salt_buf3[1];
    w3[2] = 0;
    w3[3] = (128 + salt_len) * 8;

    u64x digest[8];

    hmac_sha512_run (w0, w1, w2, w3, ipad, opad, digest);

    const u32x r0 = l32_from_64 (digest[7]);
    const u32x r1 = h32_from_64 (digest[7]);
    const u32x r2 = l32_from_64 (digest[3]);
    const u32x r3 = h32_from_64 (digest[3]);

    COMPARE_M_SIMD (r0, r1, r2, r3);
  }
}

KERNEL_FQ KERNEL_FA void m01750_m08 (KERN_ATTR_BASIC ())
{
}

KERNEL_FQ KERNEL_FA void m01750_m16 (KERN_ATTR_BASIC ())
{
}

KERNEL_FQ KERNEL_FA void m01750_s04 (KERN_ATTR_BASIC ())
{
  /**
   * modifier
   */

  const u64 lid = get_local_id (0);

  /**
   * base
   */

  const u64 gid = get_global_id (0);

  if (gid >= GID_CNT) return;

  u32 pw_buf0[4];
  u32 pw_buf1[4];

  pw_buf0[0] = pws[gid].i[0];
  pw_buf0[1] = pws[gid].i[1];
  pw_buf0[2] = pws[gid].i[2];
  pw_buf0[3] = pws[gid].i[3];
  pw_buf1[0] = pws[gid].i[4];
  pw_buf1[1] = pws[gid].i[5];
  pw_buf1[2] = pws[gid].i[6];
  pw_buf1[3] = pws[gid].i[7];

  const u32 pw_l_len = pws[gid].pw_len & 63;

  /**
   * salt
   */

  u32 salt_buf0[4];
  u32 salt_buf1[4];
  u32 salt_buf2[4];
  u32 salt_buf3[4];

  salt_buf0[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 0]);
  salt_buf0[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 1]);
  salt_buf0[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 2]);
  salt_buf0[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 3]);
  salt_buf1[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 4]);
  salt_buf1[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 5]);
  salt_buf1[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 6]);
  salt_buf1[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 7]);
  salt_buf2[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 8]);
  salt_buf2[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[ 9]);
  salt_buf2[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[10]);
  salt_buf2[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[11]);
  salt_buf3[0] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[12]);
  salt_buf3[1] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[13]);
  salt_buf3[2] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[14]);
  salt_buf3[3] = hc_swap32_S (salt_bufs[SALT_POS_HOST].salt_buf[15]);

  const u32 salt_len = salt_bufs[SALT_POS_HOST].salt_len;

  /**
   * digest
   */

  const u32 search[4] =
  {
    digests_buf[DIGESTS_OFFSET_HOST].digest_buf[DGST_R0],
    digests_buf[DIGESTS_OFFSET_HOST].digest_buf[DGST_R1],
    digests_buf[DIGESTS_OFFSET_HOST].digest_buf[DGST_R2],
    digests_buf[DIGESTS_OFFSET_HOST].digest_buf[DGST_R3]
  };

  /**
   * loop
   */

  for (u32 il_pos = 0; il_pos < IL_CNT; il_pos += VECT_SIZE)
  {
    const u32x pw_r_len = COMBS_PW_R_LEN (il_pos) & 63;

    const u32x pw_len = (pw_l_len + pw_r_len) & 63;

    /**
     * concat password candidate
     */

    u32x wordl0[4] = { 0 };
    u32x wordl1[4] = { 0 };
    u32x wordl2[4] = { 0 };
    u32x wordl3[4] = { 0 };

    wordl0[0] = pw_buf0[0];
    wordl0[1] = pw_buf0[1];
    wordl0[2] = pw_buf0[2];
    wordl0[3] = pw_buf0[3];
    wordl1[0] = pw_buf1[0];
    wordl1[1] = pw_buf1[1];
    wordl1[2] = pw_buf1[2];
    wordl1[3] = pw_buf1[3];

    u32x wordr0[4] = { 0 };
    u32x wordr1[4] = { 0 };
    u32x wordr2[4] = { 0 };
    u32x wordr3[4] = { 0 };

    #if ATTACK_MODE == 12
    if (COMBS_IS_MIDDLE)
    {
      // -a 12 assembles five pieces in these two register sets: mask, base word, mask, second word,
      // mask. wordl is the accumulator and wordr carries one piece at a time. The piece behind the
      // last word is left in wordr, because the OR below already folds wordr in.
      //
      // Only the second word changes length from one amplifier item to the next. Every other offset
      // is a property of the mask, so those shifts are by a scalar and cost what the shift by
      // pw_l_len costs today.

      if (COMBS_PRE_LEN > 0)
      {
        switch_buffer_by_offset_le_VV (wordl0, wordl1, wordl2, wordl3, COMBS_PRE_LEN);

        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_PRE, wordr0, wordr1, wordr2, wordr3);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);
      }

      u32x comb_off = COMBS_PRE_LEN + pw_l_len;

      if (COMBS_MID_LEN > 0)
      {
        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_MID, wordr0, wordr1, wordr2, wordr3);

        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);

        comb_off += COMBS_MID_LEN;
      }

      if (COMBS_HAS_Q > 0)
      {
        combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_WORD, wordr0, wordr1, wordr2, wordr3);

        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);

        combs_fold_VV (wordl0, wordl1, wordl2, wordl3, wordr0, wordr1, wordr2, wordr3);

        comb_off += pwlenx_create_combp (combs_buf, il_pos, COMBS_PIECE_WORD);
      }

      combs_piece8_VV (combs_buf, il_pos, COMBS_PIECE_POST, wordr0, wordr1, wordr2, wordr3);

      if (COMBS_POST_LEN > 0) switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, comb_off);
    }
    else
    #endif
    {
      wordr0[0] = ix_create_combt (combs_buf, il_pos, 0);
      wordr0[1] = ix_create_combt (combs_buf, il_pos, 1);
      wordr0[2] = ix_create_combt (combs_buf, il_pos, 2);
      wordr0[3] = ix_create_combt (combs_buf, il_pos, 3);
      wordr1[0] = ix_create_combt (combs_buf, il_pos, 4);
      wordr1[1] = ix_create_combt (combs_buf, il_pos, 5);
      wordr1[2] = ix_create_combt (combs_buf, il_pos, 6);
      wordr1[3] = ix_create_combt (combs_buf, il_pos, 7);

      if (COMBS_MODE == COMBINATOR_MODE_BASE_LEFT)
      {
        switch_buffer_by_offset_le_VV (wordr0, wordr1, wordr2, wordr3, pw_l_len);
      }
      else
      {
        switch_buffer_by_offset_le_VV (wordl0, wordl1, wordl2, wordl3, pw_r_len);
      }
    }

    u32x w0[4];
    u32x w1[4];
    u32x w2[4];
    u32x w3[4];

    w0[0] = wordl0[0] | wordr0[0];
    w0[1] = wordl0[1] | wordr0[1];
    w0[2] = wordl0[2] | wordr0[2];
    w0[3] = wordl0[3] | wordr0[3];
    w1[0] = wordl1[0] | wordr1[0];
    w1[1] = wordl1[1] | wordr1[1];
    w1[2] = wordl1[2] | wordr1[2];
    w1[3] = wordl1[3] | wordr1[3];
    w2[0] = wordl2[0] | wordr2[0];
    w2[1] = wordl2[1] | wordr2[1];
    w2[2] = wordl2[2] | wordr2[2];
    w2[3] = wordl2[3] | wordr2[3];
    w3[0] = wordl3[0] | wordr3[0];
    w3[1] = wordl3[1] | wordr3[1];
    w3[2] = wordl3[2] | wordr3[2];
    w3[3] = wordl3[3] | wordr3[3];

    w0[0] = hc_swap32 (w0[0]);
    w0[1] = hc_swap32 (w0[1]);
    w0[2] = hc_swap32 (w0[2]);
    w0[3] = hc_swap32 (w0[3]);
    w1[0] = hc_swap32 (w1[0]);
    w1[1] = hc_swap32 (w1[1]);
    w1[2] = hc_swap32 (w1[2]);
    w1[3] = hc_swap32 (w1[3]);
    w2[0] = hc_swap32 (w2[0]);
    w2[1] = hc_swap32 (w2[1]);
    w2[2] = hc_swap32 (w2[2]);
    w2[3] = hc_swap32 (w2[3]);
    w3[0] = hc_swap32 (w3[0]);
    w3[1] = hc_swap32 (w3[1]);
    w3[2] = hc_swap32 (w3[2]);
    w3[3] = hc_swap32 (w3[3]);

    /**
     * pads
     */

    u64x ipad[8];
    u64x opad[8];

    hmac_sha512_pad (w0, w1, w2, w3, ipad, opad);

    w0[0] = salt_buf0[0];
    w0[1] = salt_buf0[1];
    w0[2] = salt_buf0[2];
    w0[3] = salt_buf0[3];
    w1[0] = salt_buf1[0];
    w1[1] = salt_buf1[1];
    w1[2] = salt_buf1[2];
    w1[3] = salt_buf1[3];
    w2[0] = salt_buf2[0];
    w2[1] = salt_buf2[1];
    w2[2] = salt_buf2[2];
    w2[3] = salt_buf2[3];
    w3[0] = salt_buf3[0];
    w3[1] = salt_buf3[1];
    w3[2] = 0;
    w3[3] = (128 + salt_len) * 8;

    u64x digest[8];

    hmac_sha512_run (w0, w1, w2, w3, ipad, opad, digest);

    const u32x r0 = l32_from_64 (digest[7]);
    const u32x r1 = h32_from_64 (digest[7]);
    const u32x r2 = l32_from_64 (digest[3]);
    const u32x r3 = h32_from_64 (digest[3]);

    COMPARE_S_SIMD (r0, r1, r2, r3);
  }
}

KERNEL_FQ KERNEL_FA void m01750_s08 (KERN_ATTR_BASIC ())
{
}

KERNEL_FQ KERNEL_FA void m01750_s16 (KERN_ATTR_BASIC ())
{
}
