1 files changed, 57 insertions, 0 deletions
diff --git a/src/internal/cpu/cpu_x86_test.go b/src/internal/cpu/cpu_x86_test.go
new file mode 100644
index 0000000..cc6552b
--- /dev/null
+++ b/src/internal/cpu/cpu_x86_test.go
@@ -0,0 +1,57 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build 386 || amd64
+
+package cpu_test
+
+import (
+	. "internal/cpu"
+	"internal/godebug"
+	"testing"
+)
+
+func TestX86ifAVX2hasAVX(t *testing.T) {
+	if X86.HasAVX2 && !X86.HasAVX {
+		t.Fatalf("HasAVX expected true when HasAVX2 is true, got false")
+	}
+}
+
+func TestX86ifAVX512FhasAVX2(t *testing.T) {
+	if X86.HasAVX512F && !X86.HasAVX2 {
+		t.Fatalf("HasAVX2 expected true when HasAVX512F is true, got false")
+	}
+}
+
+func TestX86ifAVX512BWhasAVX512F(t *testing.T) {
+	if X86.HasAVX512BW && !X86.HasAVX512F {
+		t.Fatalf("HasAVX512F expected true when HasAVX512BW is true, got false")
+	}
+}
+
+func TestX86ifAVX512VLhasAVX512F(t *testing.T) {
+	if X86.HasAVX512VL && !X86.HasAVX512F {
+		t.Fatalf("HasAVX512F expected true when HasAVX512VL is true, got false")
+	}
+}
+
+func TestDisableSSE3(t *testing.T) {
+	if GetGOAMD64level() > 1 {
+		t.Skip("skipping test: can't run on GOAMD64>v1 machines")
+	}
+	runDebugOptionsTest(t, "TestSSE3DebugOption", "cpu.sse3=off")
+}
+
+func TestSSE3DebugOption(t *testing.T) {
+	MustHaveDebugOptionsSupport(t)
+
+	if godebug.New("#cpu.sse3").Value() != "off" {
+		t.Skipf("skipping test: GODEBUG=cpu.sse3=off not set")
+	}
+
+	want := false
+	if got := X86.HasSSE3; got != want {
+		t.Errorf("X86.HasSSE3 expected %v, got %v", want, got)
+	}
+}