"GOARCH=amd64", "GOOS=linux", "GOPATH="+filepath.Join(tmpdir, "_gopath"))
	asmout, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("error %s output %s", err, asmout)
	}
	return asmout
}

func parseOutput(t *testing.T, td *ParsedTestData, asmout []byte) {
	scanner := bufio.NewScanner(bytes.NewReader(asmout))
	marker := regexp.MustCompile(`MOVQ \$([0-9]+), AX`)
	mark := -1
	td.marker_to_output = make(map[int][]string)

	type subOutputSerialization OutputSerialization
	parsedOutput := subOutputSerialization{}
	if err := d.DecodeElement(&parsedOutput, &start); err != nil {
		return errMalformedXML(err)
	}

	found := 0
	if !parsedOutput.CSVArgs.IsEmpty() {
		parsedOutput.format = csvFormat
		found++
	}
	if !parsedOutput.JSONArgs.IsEmpty() {
		parsedOutput.format = jsonFormat
		found++
	}
	if found != 1 {