github.com/JimmyHuang454/JLS-go@v0.0.0-20230831150107-90d536585ba0/internal/cpu/cpu_x86_test.go (about)

     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  
     7  package cpu_test
     8  
     9  import (
    10  	. "internal/cpu"
    11  	"internal/godebug"
    12  	"testing"
    13  )
    14  
    15  func 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  
    21  func TestDisableSSE3(t *testing.T) {
    22  	if GetGOAMD64level() > 1 {
    23  		t.Skip("skipping test: can't run on GOAMD64>v1 machines")
    24  	}
    25  	runDebugOptionsTest(t, "TestSSE3DebugOption", "cpu.sse3=off")
    26  }
    27  
    28  func TestSSE3DebugOption(t *testing.T) {
    29  	MustHaveDebugOptionsSupport(t)
    30  
    31  	if godebug.New("cpu.sse3").Value() != "off" {
    32  		t.Skipf("skipping test: GODEBUG=cpu.sse3=off not set")
    33  	}
    34  
    35  	want := false
    36  	if got := X86.HasSSE3; got != want {
    37  		t.Errorf("X86.HasSSE3 expected %v, got %v", want, got)
    38  	}
    39  }