keccak_perm_bmi2.cpp

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/*
* Keccak-FIPS
* (C) 2019 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#include <botan/internal/keccak_perm.h>
 
#include <botan/internal/isa_extn.h>
#include <botan/internal/keccak_perm_round.h>
 
namespace Botan {
 
void BOTAN_FN_ISA_BMI2 Keccak_Permutation::permute_bmi2() {
   static const uint64_t RC[24] = {0x0000000000000001, 0x0000000000008082, 0x800000000000808A, 0x8000000080008000,
                                   0x000000000000808B, 0x0000000080000001, 0x8000000080008081, 0x8000000000008009,
                                   0x000000000000008A, 0x0000000000000088, 0x0000000080008009, 0x000000008000000A,
                                   0x000000008000808B, 0x800000000000008B, 0x8000000000008089, 0x8000000000008003,
                                   0x8000000000008002, 0x8000000000000080, 0x000000000000800A, 0x800000008000000A,
                                   0x8000000080008081, 0x8000000000008080, 0x0000000080000001, 0x8000000080008008};
 
   uint64_t T[25];
 
   for(size_t i = 0; i != 24; i += 2) {
      Keccak_Permutation_round(T, state().data(), RC[i + 0]);
      Keccak_Permutation_round(state().data(), T, RC[i + 1]);
   }
}
 
}  // namespace Botan