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3283fc3f61
Add a RISCV64 variable to cpu that indicates both the presence of RISC-V extensions and performance information about the underlying RISC-V cores. The variable is only populated with non false values on Linux. The detection code first attempts to use the riscv_hwprobe syscall introduced in Linux 6.4, falling back to HWCAP if riscv_hwprobe is not supported. The patch can detect the C, V, Zba, Zbb and Zbs extensions. V, Zba, Zbb and Zbs can only be detected on a 6.5 kernel or later (without backports). Updates golang/go#61416 Change-Id: I40f92724ee3d337c06bdc559ff0b18a8f6bfda9f Reviewed-on: https://go-review.googlesource.com/c/sys/+/605815 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Joel Sing <joel@sing.id.au> Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cpu_test
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import (
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"runtime"
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"testing"
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"golang.org/x/sys/cpu"
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)
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func TestAMD64minimalFeatures(t *testing.T) {
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if runtime.GOARCH == "amd64" {
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if !cpu.Initialized {
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t.Fatal("Initialized expected true, got false")
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}
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if !cpu.X86.HasSSE2 {
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t.Fatal("HasSSE2 expected true, got false")
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}
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}
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}
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func TestAVX2hasAVX(t *testing.T) {
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if runtime.GOARCH == "amd64" {
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if cpu.X86.HasAVX2 && !cpu.X86.HasAVX {
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t.Fatal("HasAVX expected true, got false")
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}
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}
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}
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func TestAVX512HasAVX2AndAVX(t *testing.T) {
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if runtime.GOARCH == "amd64" {
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if cpu.X86.HasAVX512 && !cpu.X86.HasAVX {
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t.Fatal("HasAVX expected true, got false")
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}
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if cpu.X86.HasAVX512 && !cpu.X86.HasAVX2 {
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t.Fatal("HasAVX2 expected true, got false")
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}
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}
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}
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func TestARM64minimalFeatures(t *testing.T) {
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if runtime.GOARCH != "arm64" || runtime.GOOS == "ios" {
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return
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}
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if !cpu.ARM64.HasASIMD {
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t.Fatal("HasASIMD expected true, got false")
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}
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if !cpu.ARM64.HasFP {
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t.Fatal("HasFP expected true, got false")
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}
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}
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func TestMIPS64Initialized(t *testing.T) {
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if runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le" {
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if !cpu.Initialized {
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t.Fatal("Initialized expected true, got false")
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}
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}
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}
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func TestRISCV64Initialized(t *testing.T) {
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if runtime.GOARCH == "riscv64" {
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if !cpu.Initialized {
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t.Fatal("Initialized expected true, got false")
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}
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}
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}
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// On ppc64x, the ISA bit for POWER8 should always be set on POWER8 and beyond.
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func TestPPC64minimalFeatures(t *testing.T) {
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// Do not run this with gccgo on ppc64, as it doesn't have POWER8 as a minimum
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// requirement.
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if runtime.Compiler == "gccgo" && runtime.GOARCH == "ppc64" {
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t.Skip("gccgo does not require POWER8 on ppc64; skipping")
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}
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if runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" {
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if !cpu.PPC64.IsPOWER8 {
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t.Fatal("IsPOWER8 expected true, got false")
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}
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}
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}
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