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| author | fanzha02 <fannie.zhang@arm.com> | 2021-09-06 11:15:30 +0800 |
|---|---|---|
| committer | fannie zhang <Fannie.Zhang@arm.com> | 2021-09-06 03:31:53 +0000 |
| commit | 7b69ddc171938b8321a535dd79b8ca2ba56ac72d (patch) | |
| tree | 25a037893bb0068c3960cec1138fdf1874dd545f /test | |
| parent | 43b05173a219e19697c2f9c6d98cf4d8667b7ca5 (diff) | |
| download | go-7b69ddc171938b8321a535dd79b8ca2ba56ac72d.tar.gz go-7b69ddc171938b8321a535dd79b8ca2ba56ac72d.zip | |
cmd/compile: merge sign extension and shift into SBFIZ
This patch adds some rules to rewrite "(LeftShift (SignExtend x) lc)"
expression as "SBFIZ".
Add the test cases.
Change-Id: I294c4ba09712eeb02c7a952447bb006780f1e60d
Reviewed-on: https://go-review.googlesource.com/c/go/+/267602
Trust: fannie zhang <Fannie.Zhang@arm.com>
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'test')
| -rw-r--r-- | test/codegen/bitfield.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/codegen/bitfield.go b/test/codegen/bitfield.go index 6c66e3ab6d..d4ffbad85d 100644 --- a/test/codegen/bitfield.go +++ b/test/codegen/bitfield.go @@ -99,6 +99,18 @@ func sbfiz5(x int32) int32 { return (x << 4) >> 3 } +func sbfiz5(x int32) int64 { + return int64(x+1) << 40 // arm64:"SBFIZ\t[$]40, R[0-9]+, [$]24",-"LSL" +} + +func sbfiz6(x int16) int64 { + return int64(x+1) << 3 // arm64:"SBFIZ\t[$]3, R[0-9]+, [$]16",-"LSL" +} + +func sbfiz7(x int8) int64 { + return int64(x+1) << 62 // arm64:"SBFIZ\t[$]62, R[0-9]+, [$]2",-"LSL" +} + // sbfx func sbfx1(x int64) int64 { return (x << 3) >> 4 // arm64:"SBFX\t[$]1, R[0-9]+, [$]60",-"LSL",-"ASR" |