#ifndef PERMUTATIONS_H_
#define PERMUTATIONS_H_

#include <stdint.h>

#include "api.h"
#include "ascon.h"
#include "printstate.h"
#include "round.h"

#define ASCON_128_KEYBYTES 16
#define ASCON_128A_KEYBYTES 16
#define ASCON_80PQ_KEYBYTES 20

#define ASCON_128_RATE 8
#define ASCON_128A_RATE 16

#define ASCON_128_PA_ROUNDS 12
#define ASCON_128_PB_ROUNDS 6
#define ASCON_128A_PB_ROUNDS 8

#define ASCON_HASH_BYTES 32

#define ASCON_128_IV WORD_T(0x8040000020301000ull)
#define ASCON_128A_IV WORD_T(0xc000000030200000ull)
#define ASCON_80PQ_IV WORD_T(0x8040800020301000ull)
#define ASCON_HASH_IV WORD_T(0x0040000020200002ull)
#define ASCON_XOF_IV WORD_T(0x0040000020200000ull)

#define ASCON_HASH_IV0 WORD_T(0xfa8e976bb985dc4dull)
#define ASCON_HASH_IV1 WORD_T(0xc8085072a40ccd94ull)
#define ASCON_HASH_IV2 WORD_T(0xfe1781be5a847314ull)
#define ASCON_HASH_IV3 WORD_T(0x2f871f6c6d0082b2ull)
#define ASCON_HASH_IV4 WORD_T(0x7a1ba68850ec407eull)

#define ASCON_XOF_IV0 WORD_T(0x8a46f0d354e771b8ull)
#define ASCON_XOF_IV1 WORD_T(0x04489f4084368cd0ull)
#define ASCON_XOF_IV2 WORD_T(0x6c94f2150dbcf66cull)
#define ASCON_XOF_IV3 WORD_T(0x48965294f143b44eull)
#define ASCON_XOF_IV4 WORD_T(0x0788515fe0e5fb8aull)

#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 16
#define IV ASCON_128_IV
#define PA_ROUNDS 12
#define PB_ROUNDS 6
#define PB P6
#endif

#if ASCON_RATE == 16
#define IV ASCON_128A_IV
#define PA_ROUNDS 12
#define PB_ROUNDS 8
#define PB P8
#endif

#if ASCON_RATE == 8 && CRYPTO_KEYBYTES == 20
#define IV ASCON_80PQ_IV
#define PA_ROUNDS 12
#define PB_ROUNDS 6
#define PB P6
#endif

#define START(n) (12 - n)

#if ASCON_UNROLL_LOOPS

__forceinline void P12ROUNDS(state_t* s) {
  ROUND(s, 0x0101010100000000ull);
  ROUND(s, 0x0101010000000001ull);
  ROUND(s, 0x0101000100000100ull);
  ROUND(s, 0x0101000000000101ull);
  ROUND(s, 0x0100010100010000ull);
  ROUND(s, 0x0100010000010001ull);
  ROUND(s, 0x0100000100010100ull);
  ROUND(s, 0x0100000000010101ull);
  ROUND(s, 0x0001010101000000ull);
  ROUND(s, 0x0001010001000001ull);
  ROUND(s, 0x0001000101000100ull);
  ROUND(s, 0x0001000001000101ull);
}

__forceinline void P8ROUNDS(state_t* s) {
  ROUND(s, 0x0100010100010000ull);
  ROUND(s, 0x0100010000010001ull);
  ROUND(s, 0x0100000100010100ull);
  ROUND(s, 0x0100000000010101ull);
  ROUND(s, 0x0001010101000000ull);
  ROUND(s, 0x0001010001000001ull);
  ROUND(s, 0x0001000101000100ull);
  ROUND(s, 0x0001000001000101ull);
}

__forceinline void P6ROUNDS(state_t* s) {
  ROUND(s, 0x0100000100010100ull);
  ROUND(s, 0x0100000000010101ull);
  ROUND(s, 0x0001010101000000ull);
  ROUND(s, 0x0001010001000001ull);
  ROUND(s, 0x0001000101000100ull);
  ROUND(s, 0x0001000001000101ull);
}

#else /* !ASCON_UNROLL_LOOPS */

extern const uint64_t constants[12];

__forceinline void P12ROUNDS(state_t* s) {
  for (int i = START(12); i < 12; ++i) ROUND(s, constants[i]);
}

__forceinline void P8ROUNDS(state_t* s) {
  for (int i = START(8); i < 12; ++i) ROUND(s, constants[i]);
}

__forceinline void P6ROUNDS(state_t* s) {
  for (int i = START(6); i < 12; ++i) ROUND(s, constants[i]);
}

#endif

#if ASCON_INLINE_PERM

__forceinline void P12(state_t* s) {
  printstate(" permutation input", s);
  P12ROUNDS(s);
}

__forceinline void P8(state_t* s) {
  printstate(" permutation input", s);
  P8ROUNDS(s);
}

__forceinline void P6(state_t* s) {
  printstate(" permutation input", s);
  P6ROUNDS(s);
}

__forceinline void P(state_t* s, int i) {
  if (i == 12) P12(s);
  if (i == 8) P8(s);
  if (i == 6) P6(s);
}

#elif ASCON_SINGLE_PERM

#define P12(s) P(s, 12)
#define P8(s) P(s, 8)
#define P6(s) P(s, 6)

void P(state_t* s, uint8_t rounds);

#else /* !ASCON_INLINE_PERM && !ASCON_SINGLE_PERM */

void P12(state_t* s);
void P8(state_t* s);
void P6(state_t* s);

__forceinline void P(state_t* s, int i) {
  if (i == 12) P12(s);
  if (i == 8) P8(s);
  if (i == 6) P6(s);
}

#endif

#endif /* PERMUTATIONS_H_ */