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/* bits.c: various bits and pieces */

#include "bits.h"

uint64_t

bitfield(uint64_t val, int low_bit, int high_bit)

{

        return val>>low_bit & ~((~((uint64_t)0))<<(high_bit-low_bit+1));

}

int

sign_extend(uint32_t val, int len)

{

        if ((val >> (len-1)) & 1)

                return val | ((~0) << len);

        return val;

}