sh.c (reg_class_from_letter): No longer const.

	* sh.c (reg_class_from_letter): No longer const.  Add 'e' entry.
	(sh_register_move_cost): Add clause for SImode fp-fp moves.
	Increase cost for moves involving multiple general purpose registers.
	* sh.h (OVERRIDE_OPTIONS): Set reg_class_from_letter['e'] according to
	TARGET_FMOVD.
	(HARD_REGNO_MODE_OK): Allow V2SFmode and V4SFmode in general purpose
	registers, and SImode in fp registers, for ! TARGET_SHMEDIA.
	(enum reg_class reg_class_from_letter): No longer const.
	(SECONDARY_OUTPUT_RELOAD_CLASS): Use REGCLASS_HAS_FP_REG /
	REGCLASS_HAS_GENERAL_REG.
	Handle SImode moves from/to fp registers.
	! TARGET_SHMEDIA && TARGET_FMOVD.
	(SECONDARY_INPUT_RELOAD_CLASS): Use REGCLASS_HAS_FP_REG.
	* sh.md (movsi_ie): Add alternatives to move from / to fp regisyters.

From-SVN: r60076