/*

* (C) 2023 Jack Lloyd

*

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

*/

#ifndef BOTAN_SHA2_32_F_H_

#define BOTAN_SHA2_32_F_H_

#include <botan/types.h>

#include <botan/internal/bit_ops.h>

#include <botan/internal/rotate.h>

namespace Botan {

/*

* SHA-256 F1 Function

*/

BOTAN_FORCE_INLINE void SHA2_32_F(uint32_t A,

                                  uint32_t B,

                                  uint32_t C,

                                  uint32_t& D,

                                  uint32_t E,

                                  uint32_t F,

                                  uint32_t G,

                                  uint32_t& H,

                                  uint32_t& M1,

                                  uint32_t M2,

                                  uint32_t M3,

                                  uint32_t M4,

                                  uint32_t magic) {

   uint32_t A_rho = rho<2, 13, 22>(A);

   uint32_t E_rho = rho<6, 11, 25>(E);

   uint32_t M2_sigma = sigma<17, 19, 10>(M2);

   uint32_t M4_sigma = sigma<7, 18, 3>(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