* i386.md (movhi_1): Promote movw imm, reg to movl imm, reg and

	movw reg, reg to movzwl reg, reg on PARTIAL_REGISTER_STALL machines.
	* i386.c (pentiumpro_cost): Set mul cost to 4.
	(x86_use_movx): Set for PPro.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32560 138bc75d-0d04-0410-961f-82ee72b054a4