/*

* (C) 2023 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_SHA2_64_F_H_

#define BOTAN_SHA2_64_F_H_

#include <botan/types.h>

#include <botan/internal/bit_ops.h>

#include <botan/internal/rotate.h>

namespace Botan {

/*

* SHA-512 F1 Function

*/

BOTAN_FORCE_INLINE void SHA2_64_F(uint64_t A,

                                  uint64_t B,

                                  uint64_t C,

                                  uint64_t& D,

                                  uint64_t E,

                                  uint64_t F,

                                  uint64_t G,

                                  uint64_t& H,

                                  uint64_t& M1,

                                  uint64_t M2,

                                  uint64_t M3,

                                  uint64_t M4,

                                  uint64_t magic) {

   const uint64_t E_rho = rho<14, 18, 41>(E);

   const uint64_t A_rho = rho<28, 34, 39>(A);

   const uint64_t M2_sigma = sigma<19, 61, 6>(M2);

   const uint64_t M4_sigma = sigma<1, 8, 7>(M4);

   H += magic + E_rho + choose(E, F, G) + M1;

   D += H;

   H += A_rho + majority(A, B, C);

   M1 += M2_sigma + M3 + M4_sigma;

}

}  // namespace Botan

#endif