n2n/speck.h

#define u64 uint64_t

#if defined (__AVX2__)
 #define SPECK_ALIGNED_CTX	32
 #include <immintrin.h>
 #define u256 __m256i
typedef struct {
        u256 rk[34];
        u64 key[34];
} speck_context_t;
#elif defined (__SSE4_2__)
 #define SPECK_ALIGNED_CTX	16
 #include <immintrin.h>
 #define u128 __m128i
typedef struct {
        u128 rk[34];
        u64 key[34];
} speck_context_t;
#elif defined (__ARM_NEON)
 #include <arm_neon.h>
 #define u128 uint64x2_t
typedef struct {
        u128 rk[34];
        u64 key[34];
} speck_context_t;
#else
typedef struct {
        u64 key[34];
} speck_context_t;
#endif

int speck_ctr (unsigned char *out, const unsigned char *in,
	       unsigned long long inlen,
               const unsigned char *n,
               speck_context_t *ctx);

int speck_expand_key (const unsigned char *k, speck_context_t *ctx);