if out, err := cmd.CombinedOutput(); err != nil {
		t.Errorf("%v\n%s", err, out)
	}
}

// TestPCALIGN verifies the correctness of the PCALIGN by checking if the
// code can be aligned to the alignment value.
func TestPCALIGN(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	dir, err := os.MkdirTemp("", "testpcalign")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(dir)
	tmpfile := filepath.Join(dir, "test.s")

				regName := rconv(int(reg))
				t.Errorf("regIndex(%s):\nhave: %d\nwant: %d",
					regName, have, want)
			}
		}
	}
}

// TestPCALIGN verifies the correctness of the PCALIGN by checking if the
// code can be aligned to the alignment value.
func TestPCALIGN(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	dir := t.TempDir()
	tmpfile := filepath.Join(dir, "test.s")
	tmpout := filepath.Join(dir, "test.o")

	fmt.Fprintln(buf, "label_end:")
	fmt.Fprintln(buf, "MOVD R0, R1")
	fmt.Fprintln(buf, "RET")
}

// TestPCalign generates two asm files containing the
// PCALIGN directive, to verify correct values are and
// accepted, and incorrect values are flagged in error.
func TestPCalign(t *testing.T) {
	var pattern8 = `0x...8\s.*ADD\s..,\sR8`
	var pattern16 = `0x...[80]\s.*MOVD\s..,\sR16`

	cmd.Dir = "testdata/testbranch"
	if out, err := testenv.CleanCmdEnv(cmd).CombinedOutput(); err != nil {
		t.Errorf("Branch test failed: %v\n%s", err, out)
	}
}

func TestPCAlign(t *testing.T) {
	dir := t.TempDir()
	tmpfile := filepath.Join(dir, "x.s")
	asm := `
TEXT _stub(SB),$0-0
	FENCE
	PCALIGN	$8
	FENCE
	RET
`