Question

/* 2-state and 4-state vectors, modelled upon PLI’s avalue/bvalue */

#define SV_CANONICAL_SIZE(WIDTH) (((WIDTH)+31)>>5)

typedef unsigned int

svBitVec32;/* (a chunk of) packed bit array */

typedef struct { unsigned int c; unsigned int d;}

svLogicVec32; /* (a chunk of) packed logic array */

/* Since the contents of the unused bits is undetermined, the following macros

can be handy */

#define SV_MASK(N) (~(-1<<(N)))

#define SV_GET_UNSIGNED_BITS(VALUE,N)\

((N)==32?(VALUE):((VALUE)&SV_MASK(N)))

#define SV_GET_SIGNED_BITS(VALUE,N)\

((N)==32?(VALUE):\

(((VALUE)&(1<<((N)1)))?((VALUE)|~SV_MASK(N)):((VALUE)&SV_MASK(N))))