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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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19
src/cmd/compile/internal/ssa/gen/ARM64Ops.go
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@ -376,6 +376,25 @@ func init() {
faultOnNilArg0: true,
},
// duffcopy
// arg0 = address of dst memory (in R17 aka arm64.REGRT2, changed as side effect)
// arg1 = address of src memory (in R16 aka arm64.REGRT1, changed as side effect)
// arg2 = mem
// auxint = offset into duffcopy code to start executing
// returns mem
// R16, R17 changed as side effect
{
name: "DUFFCOPY",
aux: "Int64",
argLength: 3,
reg: regInfo{
inputs: []regMask{buildReg("R17"), buildReg("R16")},
clobbers: buildReg("R16 R17"),
},
faultOnNilArg0: true,
faultOnNilArg1: true,
},
// large move
// arg0 = address of dst memory (in R17 aka arm64.REGRT2, changed as side effect)
// arg1 = address of src memory (in R16 aka arm64.REGRT1, changed as side effect)