1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build 386 || amd64
6
7package cpu_test
8
9import (
10	. "internal/cpu"
11	"internal/godebug"
12	"testing"
13)
14
15func TestX86ifAVX2hasAVX(t *testing.T) {
16	if X86.HasAVX2 && !X86.HasAVX {
17		t.Fatalf("HasAVX expected true when HasAVX2 is true, got false")
18	}
19}
20
21func TestX86ifAVX512FhasAVX2(t *testing.T) {
22	if X86.HasAVX512F && !X86.HasAVX2 {
23		t.Fatalf("HasAVX2 expected true when HasAVX512F is true, got false")
24	}
25}
26
27func TestX86ifAVX512BWhasAVX512F(t *testing.T) {
28	if X86.HasAVX512BW && !X86.HasAVX512F {
29		t.Fatalf("HasAVX512F expected true when HasAVX512BW is true, got false")
30	}
31}
32
33func TestX86ifAVX512VLhasAVX512F(t *testing.T) {
34	if X86.HasAVX512VL && !X86.HasAVX512F {
35		t.Fatalf("HasAVX512F expected true when HasAVX512VL is true, got false")
36	}
37}
38
39func TestDisableSSE3(t *testing.T) {
40	if GetGOAMD64level() > 1 {
41		t.Skip("skipping test: can't run on GOAMD64>v1 machines")
42	}
43	runDebugOptionsTest(t, "TestSSE3DebugOption", "cpu.sse3=off")
44}
45
46func TestSSE3DebugOption(t *testing.T) {
47	MustHaveDebugOptionsSupport(t)
48
49	if godebug.New("#cpu.sse3").Value() != "off" {
50		t.Skipf("skipping test: GODEBUG=cpu.sse3=off not set")
51	}
52
53	want := false
54	if got := X86.HasSSE3; got != want {
55		t.Errorf("X86.HasSSE3 expected %v, got %v", want, got)
56	}
57}
58