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| author | Keith Randall <khr@golang.org> | 2024-11-11 12:21:14 -0800 |
|---|---|---|
| committer | Keith Randall <khr@google.com> | 2025-05-01 09:33:31 -0700 |
| commit | 12110c3f7ed378cd1819abf72ffadcb18502c127 (patch) | |
| tree | 7c17fc207c8ead3e724f82557c35cedd659ba022 /test/codegen/arithmetic.go | |
| parent | 4d10d4ad849467f12a1a16a5ade26cc03d8f1a1f (diff) | |
| download | go-12110c3f7ed378cd1819abf72ffadcb18502c127.tar.xz | |
cmd/compile: improve multiplication strength reduction
Use an automatic algorithm to generate strength reduction code.
You give it all the linear combination (a*x+b*y) instructions in your
architecture, it figures out the rest.
Just amd64 and arm64 for now.
Fixes #67575
Change-Id: I35c69382bebb1d2abf4bb4e7c43fd8548c6c59a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/626998
Reviewed-by: Jakub Ciolek <jakub@ciolek.dev>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'test/codegen/arithmetic.go')
| -rw-r--r-- | test/codegen/arithmetic.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index 530891293e..7bac85eb6c 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -649,7 +649,7 @@ func constantFold2(i0, j0, i1, j1 int) (int, int) { } func constantFold3(i, j int) int { - // arm64: "MOVD\t[$]30","MUL",-"ADD",-"LSL" + // arm64: "LSL\t[$]5,","SUB\tR[0-9]+<<1,",-"ADD" // ppc64x:"MULLD\t[$]30","MULLD" r := (5 * i) * (6 * j) return r |