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708e7fb298
This adds feature detection that works on the s390x running zos. There are some differences with Linux (no hwcap, facilities vector available in-memory). These changes should not affect other platforms. Fixes golang/go#41984. Change-Id: Ieabbfafd07367a346a4d279dde0f00aa3fc4321b Reviewed-on: https://go-review.googlesource.com/c/sys/+/262477 Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Martin Möhrmann <moehrmann@google.com> Trust: Martin Möhrmann <moehrmann@google.com> Trust: Emmanuel Odeke <emmanuel@orijtech.com>
77 lines
1.9 KiB
Go
77 lines
1.9 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 == "darwin" || 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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// 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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