LG_HPTEG_SIZE
Hash_size = n_hpteg << LG_HPTEG_SIZE;
hash_mb2 = hash_mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg;
hash_mb2 = 16 - LG_HPTEG_SIZE;
unsigned int hmask = Hash_mask >> (16 - LG_HPTEG_SIZE);