[NDS32] Rename nds32_expand_movmemqi to nds32_expand_movmemsi and rewrite its impleme...

[NDS32] Rename nds32_expand_movmemqi to nds32_expand_movmemsi and rewrite its implementation.

gcc/
	*config/nds32/nds32-memory-manipulation.c
	(nds32_emit_load_store): New.
	(nds32_emit_post_inc_load_store): New.
	(nds32_emit_mem_move): New.
	(nds32_emit_mem_move_block): New.
	(nds32_expand_movmemsi_loop_unknown_size): New.
	(nds32_expand_movmemsi_loop_known_size): New.
	(nds32_expand_movmemsi_loop): New.
	(nds32_expand_movmemsi_unroll): New.
	(nds32_expand_movmemqi): Rename ...
	(nds32_expand_movmemsi): ... to this.
	*config/nds32/nds32-multiple.md (movmemqi): Rename ...
	(movmemsi): ... to this.
	*config/nds32/nds32-protos.h (nds32_expand_movmemqi): Rename ...
	(nds32_expand_movmemsi): ... to this.

Co-Authored-By: Chung-Ju Wu <jasonwucj@gmail.com>
From-SVN: r258235