github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/cpu/cpu_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  package cpu_test
     6  
     7  import (
     8  	"runtime"
     9  	"testing"
    10  
    11  	"github.com/Andyfoo/golang/x/sys/cpu"
    12  )
    13  
    14  func TestAMD64minimalFeatures(t *testing.T) {
    15  	if runtime.GOARCH == "amd64" {
    16  		if !cpu.Initialized {
    17  			t.Fatal("Initialized expected true, got false")
    18  		}
    19  		if !cpu.X86.HasSSE2 {
    20  			t.Fatal("HasSSE2 expected true, got false")
    21  		}
    22  	}
    23  }
    24  
    25  func TestAVX2hasAVX(t *testing.T) {
    26  	if runtime.GOARCH == "amd64" {
    27  		if cpu.X86.HasAVX2 && !cpu.X86.HasAVX {
    28  			t.Fatal("HasAVX expected true, got false")
    29  		}
    30  	}
    31  }
    32  
    33  func TestARM64minimalFeatures(t *testing.T) {
    34  	if runtime.GOARCH != "arm64" || runtime.GOOS != "linux" {
    35  		return
    36  	}
    37  	if !cpu.ARM64.HasASIMD {
    38  		t.Fatal("HasASIMD expected true, got false")
    39  	}
    40  	if !cpu.ARM64.HasFP {
    41  		t.Fatal("HasFP expected true, got false")
    42  	}
    43  }
    44  
    45  // On ppc64x, the ISA bit for POWER8 should always be set on POWER8 and beyond.
    46  func TestPPC64minimalFeatures(t *testing.T) {
    47  	// Do not run this with gccgo on ppc64, as it doesn't have POWER8 as a minimum
    48  	// requirement.
    49  	if runtime.Compiler == "gccgo" && runtime.GOARCH == "ppc64" {
    50  		t.Skip("gccgo does not require POWER8 on ppc64; skipping")
    51  	}
    52  	if runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" {
    53  		if !cpu.PPC64.IsPOWER8 {
    54  			t.Fatal("IsPOWER8 expected true, got false")
    55  		}
    56  	}
    57  }
    58  
    59  func TestS390X(t *testing.T) {
    60  	if runtime.GOARCH != "s390x" {
    61  		return
    62  	}
    63  	if testing.Verbose() {
    64  		t.Logf("%+v\n", cpu.S390X)
    65  	}
    66  	// z/Architecture is mandatory
    67  	if !cpu.S390X.HasZARCH {
    68  		t.Error("HasZARCH expected true, got false")
    69  	}
    70  	// vector-enhancements require vector facility to be enabled
    71  	if cpu.S390X.HasVXE && !cpu.S390X.HasVX {
    72  		t.Error("HasVX expected true, got false (VXE is true)")
    73  	}
    74  }