round.h

#ifndef ROUND_H_
#define ROUND_H_

#include "ascon.h"
#include "printstate.h"

forceinline void ROUND(state_t* s, uint64_t C) {
  uint64_t xtemp;
  /* round constant */
  s->x[2] ^= C;
  /* s-box layer */
  s->x[0] ^= s->x[4];
  s->x[4] ^= s->x[3];
  s->x[2] ^= s->x[1];
  xtemp = s->x[0] & ~s->x[4];
  s->x[0] ^= s->x[2] & ~s->x[1];
  s->x[2] ^= s->x[4] & ~s->x[3];
  s->x[4] ^= s->x[1] & ~s->x[0];
  s->x[1] ^= s->x[3] & ~s->x[2];
  s->x[3] ^= xtemp;
  s->x[1] ^= s->x[0];
  s->x[3] ^= s->x[2];
  s->x[0] ^= s->x[4];
  /* linear layer */
  xtemp = s->x[0] ^ ROR(s->x[0], 28 - 19);
  s->x[0] ^= ROR(xtemp, 19);
  xtemp = s->x[1] ^ ROR(s->x[1], 61 - 39);
  s->x[1] ^= ROR(xtemp, 39);
  xtemp = s->x[2] ^ ROR(s->x[2], 6 - 1);
  s->x[2] ^= ROR(xtemp, 1);
  xtemp = s->x[3] ^ ROR(s->x[3], 17 - 10);
  s->x[3] ^= ROR(xtemp, 10);
  xtemp = s->x[4] ^ ROR(s->x[4], 41 - 7);
  s->x[4] ^= ROR(xtemp, 7);
  s->x[2] = ~s->x[2];
  printstate(" round output", s);
}

forceinline void PROUNDS(state_t* s, int nr) {
  int i = START(nr);
  do {
    ROUND(s, RC(i));
    i += INC;
  } while (i != END);
}

#endif /* ROUND_H_ */