github.com/hikaru7719/go@v0.0.0-20181025140707-c8b2ac68906a/src/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  // +build 386 amd64 amd64p32
     6  
     7  package cpu_test
     8  
     9  import (
    10  	. "internal/cpu"
    11  	"os"
    12  	"runtime"
    13  	"testing"
    14  )
    15  
    16  func TestAMD64minimalFeatures(t *testing.T) {
    17  	if runtime.GOARCH != "amd64" {
    18  		return
    19  	}
    20  
    21  	if !X86.HasSSE2 {
    22  		t.Fatalf("HasSSE2 expected true, got false")
    23  	}
    24  }
    25  
    26  func TestX86ifAVX2hasAVX(t *testing.T) {
    27  	if X86.HasAVX2 && !X86.HasAVX {
    28  		t.Fatalf("HasAVX expected true when HasAVX2 is true, got false")
    29  	}
    30  }
    31  
    32  func TestDisableSSE2(t *testing.T) {
    33  	runDebugOptionsTest(t, "TestSSE2DebugOption", "sse2=off")
    34  }
    35  
    36  func TestSSE2DebugOption(t *testing.T) {
    37  	MustHaveDebugOptionsSupport(t)
    38  
    39  	if os.Getenv("GODEBUGCPU") != "sse2=off" {
    40  		t.Skipf("skipping test: GODEBUGCPU=sse2=off not set")
    41  	}
    42  
    43  	want := runtime.GOARCH != "386" // SSE2 can only be disabled on 386.
    44  	if got := X86.HasSSE2; got != want {
    45  		t.Errorf("X86.HasSSE2 on %s expected %v, got %v", runtime.GOARCH, want, got)
    46  	}
    47  }
    48  
    49  func TestDisableSSE3(t *testing.T) {
    50  	runDebugOptionsTest(t, "TestSSE3DebugOption", "sse3=off")
    51  }
    52  
    53  func TestSSE3DebugOption(t *testing.T) {
    54  	MustHaveDebugOptionsSupport(t)
    55  
    56  	if os.Getenv("GODEBUGCPU") != "sse3=off" {
    57  		t.Skipf("skipping test: GODEBUGCPU=sse3=off not set")
    58  	}
    59  
    60  	want := false
    61  	if got := X86.HasSSE3; got != want {
    62  		t.Errorf("X86.HasSSE3 expected %v, got %v", want, got)
    63  	}
    64  }