CH_H2_MASK
g = &table[++bucket & CH_H2_MASK];
g = &table[++bucket & CH_H2_MASK];
g = &table[++bucket & CH_H2_MASK];
g = &table[++bucket & CH_H2_MASK];
#define CH_H2(h) ((h >> CH_H2_SHIFT) & CH_H2_MASK)