WORD_REG_BITS_SET  500 drivers/net/ethernet/via/via-rhine.c #define WORD_REG_BITS_SET(x, m, p)   do { iowrite16((ioread16((p)) & (~(m)))|(x), (p)); } while (0)
WORD_REG_BITS_SET   48 drivers/net/ethernet/via/via-velocity.h #define WORD_REG_BITS_SET(x,m,p)    do { writew( (readw((p)) & (~(m))) |(x),(p));} while (0)