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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;
}