vax.c (vax_rtx_cost): Return MAX_COST for unsupported MULT, UDIV and UMOD modes.

	* vax.c (vax_rtx_cost): Return MAX_COST for unsupported MULT, UDIV
	and UMOD modes.

	* vax.h (INDEX_TERM_P): Restrict indexing to modes which have a size
	less than or equal to eight bytes.

	* vax.md (andsi3): Remove constraints and change SET destination
	operand type to nonimmediate_operand.
	(andhi3, andqi3): Likewise.  Don't clear high order bits of operand 1
	when it is a CONST_INT.

From-SVN: r48882