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[PATCH] [ARC] Add basic support for double load and store instructions

From: Claudiu Zissulescu <Claudiu dot Zissulescu at synopsys dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, "gnu at amylaar dot uk" <gnu at amylaar dot uk>
Cc: Francois Bedard <Francois dot Bedard at synopsys dot com>, "jeremy dot bennett at embecosm dot com" <jeremy dot bennett at embecosm dot com>
Date: Fri, 15 Jan 2016 12:40:51 +0000
Subject: [PATCH] [ARC] Add basic support for double load and store instructions
Authentication-results: sourceware.org; auth=none

Please find attached a patch that adds basic support for double load/store instructions present in archs processors.

Ok to apply?

//Claudiu

gcc/
2015-01-15  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (TARGET_DWARF_REGISTER_SPAN): Define.
	(arc_init): Check validity mll64 option.
	(arc_save_restore): Use double load/store instruction.
	(arc_expand_movmem): Likewise.
	(arc_split_move): Don't split if we have double load/store
	instructions.
	(arc_dwarf_register_span): New function.
	* config/arc/arc.h (TARGET_CPU_CPP_BUILTINS): Define __ARC_LL64__.
	* config/arc/arc.md (*movdi_insn): Emit ldd/std instructions.
	(*movdf_insn): Likewise.
	* config/arc/arc.opt (mll64): New option.
	* config/arc/predicates.md (even_register_operand): New predicate.

Attachment: 0001-ARC-Add-basic-support-for-double-load-and-store-inst.patch
Description: 0001-ARC-Add-basic-support-for-double-load-and-store-inst.patch

Follow-Ups:
- Re: [PATCH] [ARC] Add basic support for double load and store instructions
  - From: Joern Wolfgang Rennecke

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