* i386.md (movstrsi): Move offline.
	(movstrdi): New.
	(strmovdi_rex64): New.
	(strmov?i): Accept 64bit.
	(strmov?i_rex64): New.
	(strmov?i_rex_1): New.
	(strmov?i_1): Disable for 64bit.
	(rep_mov?i_rex64): New.
	(rep_mov?i): Disable for 64bit.
	(clrstrsi): Move offline.
	(strset?i_rex64): New.
	(strset?i: Accept 64bit.
	(rep_stos?i): Disable for 64bit.
	(rep_stos?i_rex64): New.
	(strset?i_rex_1): New.
	(strset?i_1): Disable for 64bit.
	(cmpstrsi): Accept 64bit.
	(cmpstrsi_nz_1): Rename to cmpstrqi_nz_1; Disable for 64bit.
	(cmpstrqi_nz_rex_1): New.
	(cmpstrsi_1): Rename to cmpstrqi_1; Disable for 64bit.
	(strlensi): Move offline.
	(strlendi): New.
	(strlenqi_1): Disable for 64bit; fix constraints.
	(strlenqi_rex_1): New.
	* i386.c (ix86_adjust_counter): New static function.
	(ix86_zero_extend_to_Pmode): Likewise.
	(ix86_expand_aligntest): Likweise.
	(ix86_expand_strlensi_unroll_1): Make static; update for 64bit.
	(ix86_expand_movstr): New global function.
	(ix86_expand_clrstr): New global function.
	(ix86_expand_strlen): New global function.
	* i386-protos.h (ix86_expand_movstr, ix86_expand_clrstr,
	ix86_expand_strlen): Declare.
	(ix86_expand_strlensi_unroll_1): Delete.

From-SVN: r40826