#ifndef PK_BITS_H
#define PK_BITS_H

#define CONST_POPCOUNT2(x) ((((x) >> 0) & 1) + (((x) >> 1) & 1))
#define CONST_POPCOUNT4(x) (CONST_POPCOUNT2(x) + CONST_POPCOUNT2((x)>>2))
#define CONST_POPCOUNT8(x) (CONST_POPCOUNT4(x) + CONST_POPCOUNT4((x)>>4))
#define CONST_POPCOUNT16(x) (CONST_POPCOUNT8(x) + CONST_POPCOUNT8((x)>>8))
#define CONST_POPCOUNT32(x) (CONST_POPCOUNT16(x) + CONST_POPCOUNT16((x)>>16))
#define CONST_POPCOUNT64(x) (CONST_POPCOUNT32(x) + CONST_POPCOUNT32((x)>>32))
#define CONST_POPCOUNT(x) CONST_POPCOUNT64(x)

#define CONST_CTZ2(x) CONST_POPCOUNT2(((x) & -(x))-1)
#define CONST_CTZ4(x) CONST_POPCOUNT4(((x) & -(x))-1)
#define CONST_CTZ8(x) CONST_POPCOUNT8(((x) & -(x))-1)
#define CONST_CTZ16(x) CONST_POPCOUNT16(((x) & -(x))-1)
#define CONST_CTZ32(x) CONST_POPCOUNT32(((x) & -(x))-1)
#define CONST_CTZ64(x) CONST_POPCOUNT64(((x) & -(x))-1)
#define CONST_CTZ(x) CONST_CTZ64(x)

#define STR(x) XSTR(x)
#define XSTR(x) #x

#ifdef __riscv64
# define SLL32    sllw
# define STORE    sd
# define LOAD     ld
# define LOG_REGBYTES 3
#else
# define SLL32    sll
# define STORE    sw
# define LOAD     lw
# define LOG_REGBYTES 2
#endif
#define REGBYTES (1 << LOG_REGBYTES)

#endif