A follow of the comments I received, I have only right now added the 
simple cases of HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT and 
HOST_BITS_PER_INT == HOST_BITS_PER_LONG.  I might implement the other 
part of the patch for when HOST_BITS_PER_WIDE_INT == 
HOST_BITS_PER_LONG_LONG and HOST_BITS_PER_WIDE_INT == 
HOST_BITS_PER_LONG but this might take some time because I have to add 
some more builtins but it will clean things up.

bootstraped on powerpc-apple-darwin6.3, also bootstrapped and run then 
testsuite on i386-unknown-openbsd3.1.
Also changed need_64bit_hwint on darwin's case back to needing it and 
bootstraped there also.

ChangeLog:
2003-01-06	Andrew Pinski <pinskia@physics.uc.edu>
	* bitmap.c: (bitmap_first_set_bit) Remove comment about ffs
	since libiberty already includes it. When
	HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT, use ffs.
	genattrtab.c: (encode_units_mask) Use ffs.
	ggc-page.c: (ggc_alloc) Use ffs when HOST_BITS_PER_INT == 
HOST_BITS_PER_LONG.
	(compute_inverse) Use ffs. (ggc_recalculate_in_use_p) Use ffs when 
HOST_BITS_PER_INT == HOST_BITS_PER_LONG
	toplev.c.c: (exact_log2_wide) Use ffs when HOST_BITS_PER_WIDE_INT == 
HOST_BITS_PER_INT.
	Hide log when HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT.
	config/rs6000/rs6000.c: (extract_MB) Use ffs when HOST_BITS_PER_INT == 
HOST_BITS_PER_LONG.
	(extract_ME) Use ffs when HOST_BITS_PER_INT == HOST_BITS_PER_LONG.

Patch: