FWD                40 regex/regexec.c #define	FWD(dst, src, n)	((dst) |= ((unsigned)(src)&(here)) << (n))
FWD                64 regex/regexec.c #undef	FWD
FWD                89 regex/regexec.c #define	FWD(dst, src, n)	((dst)[here+(n)] |= (src)[here])