SCALEBITS          58 jccolor.c      #define SCALEBITS	16	/* speediest right-shift on some machines */
SCALEBITS          60 jdcolor.c      #define SCALEBITS	16	/* speediest right-shift on some machines */
SCALEBITS          72 jdmerge.c      #define SCALEBITS	16	/* speediest right-shift on some machines */