* config/m68k/m68k.md (movsi_cfv4): New pattern to allow mov3q.
	(movsi_cf): Make named, don't match TARGET_CFV4.
	(pushexthisi_const): Use mov3q if possible.
	(extendhisi2, cvf4_extendhisi2): Split extendhisi2 pattern
	to special case mvz.w for ColdFire V4.
	(extendqisi2, cvf4_extendqisi2): Split extendhisi2 pattern
	to special case mvz.b for ColdFire V4.
	(udivmodhi4, divmodhi4): Use mvz to zero extend arg for
	divide.
	(iorsi3, xorsi3, andsi3): Use bitfield instructions if possible.
	* config/m68k/m68k.c(valid_mov3q_const):  New function.
	(const_method): SWAP is valid for ColdFire.
	(MULL_COST, MULW_COST): Fix costs for ColdFire V3/V4.
	* config/m68k/m68k-protos.h (valid_mov3q_const): Prototype here.

From-SVN: r83266