diff options
| author | Xiaolin Zhao <zhaoxiaolin@loongson.cn> | 2025-08-15 16:19:01 +0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2025-08-21 11:19:34 -0700 |
| commit | 9632ba8160dd93107af3577334bcadfe40068e42 (patch) | |
| tree | f90ac24a9c13f3551399ceb0f49dd051180174ff /test/codegen | |
| parent | 8dcab6f4505d198b5609182b4b5928bd190b21a8 (diff) | |
| download | go-9632ba8160dd93107af3577334bcadfe40068e42.tar.xz | |
cmd/compile: optimize some patterns into revb2h/revb4h instruction on loong64
Pattern1: (the type of c is uint16)
c>>8 | c<<8
To:
revb2h c
Pattern2: (the type of c is uint32)
(c & 0xff00ff00)>>8 | (c & 0x00ff00ff)<<8
To:
revb2h c
Pattern3: (the type of c is uint64)
(c & 0xff00ff00ff00ff00)>>8 | (c & 0x00ff00ff00ff00ff)<<8
To:
revb4h c
Change-Id: Ic6231a3f476cbacbea4bd00e31193d107cb86cda
Reviewed-on: https://go-review.googlesource.com/c/go/+/696335
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'test/codegen')
| -rw-r--r-- | test/codegen/bitfield.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/test/codegen/bitfield.go b/test/codegen/bitfield.go index 44cf09f86f..6374d70650 100644 --- a/test/codegen/bitfield.go +++ b/test/codegen/bitfield.go @@ -338,20 +338,26 @@ func shift_no_cmp(x int) int { func rev16(c uint64) (uint64, uint64, uint64) { // arm64:`REV16`,-`AND`,-`LSR`,-`AND`,-`ORR\tR[0-9]+<<8` + // loong64:`REVB4H`,-`MOVV`,-`AND`,-`SRLV`,-`AND`,-`SLLV`,-`OR` b1 := ((c & 0xff00ff00ff00ff00) >> 8) | ((c & 0x00ff00ff00ff00ff) << 8) // arm64:-`ADD\tR[0-9]+<<8` + // loong64:-`ADDV` b2 := ((c & 0xff00ff00ff00ff00) >> 8) + ((c & 0x00ff00ff00ff00ff) << 8) // arm64:-`EOR\tR[0-9]+<<8` + // loong64:-`XOR` b3 := ((c & 0xff00ff00ff00ff00) >> 8) ^ ((c & 0x00ff00ff00ff00ff) << 8) return b1, b2, b3 } func rev16w(c uint32) (uint32, uint32, uint32) { // arm64:`REV16W`,-`AND`,-`UBFX`,-`AND`,-`ORR\tR[0-9]+<<8` + // loong64:`REVB2H`,-`AND`,-`SRL`,-`AND`,-`SLL`,-`OR` b1 := ((c & 0xff00ff00) >> 8) | ((c & 0x00ff00ff) << 8) // arm64:-`ADD\tR[0-9]+<<8` + // loong64:-`ADDV` b2 := ((c & 0xff00ff00) >> 8) + ((c & 0x00ff00ff) << 8) // arm64:-`EOR\tR[0-9]+<<8` + // loong64:-`XOR` b3 := ((c & 0xff00ff00) >> 8) ^ ((c & 0x00ff00ff) << 8) return b1, b2, b3 } |