#include <stdint.h>
#include <emmintrin.h>
#define BYTES_AT_ONCE 16
#define MBTYPE __m128i

#define MASKTYPE int
inline MASKTYPE forget_bits(MASKTYPE m,int b){return (m >>(b))<<(b);}




const uint64_t ones=0x0101010101010101;
MBTYPE make_mask(unsigned char c,int shift){
  return _mm_set_epi64x(ones*((uint64_t)c),(ones >> (8*shift))*((uint64_t)c));
}
#define LOAD(x) _mm_load_si128(( long long int * )x)
#define test_eq  _mm_cmpeq_epi8
#define AND  _mm_and_si128
#define OR   _mm_or_si128
#define shift_down _mm_srli_si128
#define shift_up   _mm_slli_si128
inline int  get_mask(MBTYPE x){ return  _mm_movemask_epi8(x); }
#define GET_BIT(x,y) (x&(1<<(y)))