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runtime, cmd/compile: implement and use DUFFCOPY on ARM64

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Change-Id: I8984eac30e5df78d4b94f19412135d3cc36969f8
Reviewed-on: https://go-review.googlesource.com/29910
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang 2016-09-27 08:57:02 -04:00
parent 7de7d20e9f
commit 9d4b40f55d
8 changed files with 463 additions and 5 deletions
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3
src/cmd/internal/obj/arm64/asm7.go
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@ -3852,8 +3852,7 @@ func opbra(ctxt *obj.Link, a obj.As) uint32 {
case AB:
return 0<<31 | 5<<26 /* imm26 */
case obj.ADUFFZERO,
ABL:
case obj.ADUFFZERO, obj.ADUFFCOPY, ABL:
return 1<<31 | 5<<26
}