tree 4ddaf9a9843712e08e4aa78fee48bf72c957552b
parent 5e939b3a9ce7864551e86c04a05db887c25e2759
author Keith Randall <khr@golang.org> 1702588070 -0800
committer Keith Randall <khr@golang.org> 1702668921 +0000

cmd/asm: fix encoding for arm right shift by constant 0

Right shifts, for some odd reasons, can encode shifts of constant
1-32 instead of 0-31. Left shifts, however, can encode shifts 0-31.
When the shift amount is 0, arm recommends encoding right shifts
using left shifts.

Fixes #64715

Change-Id: Id3825349aa7195028037893dfe01fa0e405eaa51
Reviewed-on: https://go-review.googlesource.com/c/go/+/549955
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>