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| author | fanzha02 <fannie.zhang@arm.com> | 2020-05-20 08:49:59 +0000 |
|---|---|---|
| committer | fannie zhang <Fannie.Zhang@arm.com> | 2021-03-23 01:36:23 +0000 |
| commit | b182ba7fabcd233a03bb8169634605a7fac6a856 (patch) | |
| tree | dff96264a696344a3a64901de5b1a3a888f15f7a /src/cmd/compile/internal/ssa/opGen.go | |
| parent | d25476ebb2c645495db7ae22585a8e74171b106e (diff) | |
| download | go-b182ba7fabcd233a03bb8169634605a7fac6a856.tar.gz go-b182ba7fabcd233a03bb8169634605a7fac6a856.zip | |
cmd/compile: optimize codes with arm64 REV16 instruction
Optimize some patterns into rev16/rev16w instruction.
Pattern1:
(c & 0xff00ff00)>>8 | (c & 0x00ff00ff)<<8
To:
rev16w c
Pattern2:
(c & 0xff00ff00ff00ff00)>>8 | (c & 0x00ff00ff00ff00ff)<<8
To:
rev16 c
This patch is a copy of CL 239637, contributed by Alice Xu(dianhong.xu@arm.com).
Change-Id: I96936c1db87618bc1903c04221c7e9b2779455b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/268377
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Diffstat (limited to 'src/cmd/compile/internal/ssa/opGen.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/opGen.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index db51ed95c5..3f84a09289 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -1366,6 +1366,7 @@ const ( OpARM64FSQRTS OpARM64REV OpARM64REVW + OpARM64REV16 OpARM64REV16W OpARM64RBIT OpARM64RBITW @@ -18213,6 +18214,19 @@ var opcodeTable = [...]opInfo{ }, }, { + name: "REV16", + argLen: 1, + asm: arm64.AREV16, + reg: regInfo{ + inputs: []inputInfo{ + {0, 805044223}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 g R30 + }, + outputs: []outputInfo{ + {0, 670826495}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R30 + }, + }, + }, + { name: "REV16W", argLen: 1, asm: arm64.AREV16W, |