func TestPipeThreads(t *testing.T) {
	switch runtime.GOOS {
	case "illumos", "solaris":
		t.Skip("skipping on Solaris and illumos; issue 19111")
	case "windows":
		t.Skip("skipping on Windows; issue 19098")
	case "plan9":
		t.Skip("skipping on Plan 9; does not support runtime poller")
	case "js":
		t.Skip("skipping on js; no support for os.Pipe")
	case "wasip1":

	B	runtime·callbackasm1(SB)
	MOVD	$1905, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1906, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1907, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1908, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1909, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1910, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1911, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1912, R12
	B	runtime·callbackasm1(SB)

	B	runtime·callbackasm1(SB)
	MOVW	$1905, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1906, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1907, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1908, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1909, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1910, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1911, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1912, R12
	B	runtime·callbackasm1(SB)

				"video/3gpp-tt",
				"video/3gpp2",
				"video/bmpeg",
				"video/bt656",
				"video/celb",
				"video/dv",
				"video/example",
				"video/h261",
				"video/h263",
				"video/h263-1998",
				"video/h263-2000",
				"video/h264",
				"video/jpeg",
				"video/jpeg2000",
				"video/mj2",
				"video/mp1s",
				"video/mp2p",
				"video/mp2t",
				"video/mp4",

		// Ensure that even when not valid, Host is one of "Hostname",
		// "Hostname:Port", "[Hostname]" or "[Hostname]:Port".
		// See https://golang.org/issue/29098.
		{"[google.com]:80", "google.com", "80"},
		{"google.com]:80", "google.com]", "80"},
		{"google.com:80_invalid_port", "google.com:80_invalid_port", ""},
		{"[::1]extra]:80", "::1]extra", "80"},

 * D = Y₂×Z₁³-B
 * X₃ = D² - 2A×C² - C³
 * Y₃ = D×(A×C² - X₃) - B×C³
 * Z₃ = Z₁×Z₂×C
 *
 * Three-operand formula (adopted): http://www.hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#addition-add-1998-cmo-2
 * Temp storage: T1,T2,U1,H,Z3=X3=Y3,S1,R
 *
 * T1 = Z1*Z1
 * T2 = Z2*Z2
 * U1 = X1*T2
 * H  = X2*T1
 * H  = H-U1
 * Z3 = Z1*Z2

 * D = Y₂×Z₁³-B
 * X₃ = D² - 2A×C² - C³
 * Y₃ = D×(A×C² - X₃) - B×C³
 * Z₃ = Z₁×Z₂×C
 *
 * Three-operand formula (adopted): https://www.hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#addition-add-1998-cmo-2
 * Temp storage: T1,T2,U1,H,Z3=X3=Y3,S1,R
 *
 * T1 = Z1*Z1
 * T2 = Z2*Z2
 * U1 = X1*T2
 * H  = X2*T1
 * H  = H-U1
 * Z3 = Z1*Z2

	// To work either way we call doRun directly rather than run or runFail.
	tg.doRun([]string{"build", "-x", "p"})

	tg.grepStderr("no-such-fortran-flag", `missing expected "-no-such-fortran-flag"`)
}

// Issue 19198.
// This is really a cmd/link issue but this is a convenient place to test it.
func TestDuplicateGlobalAsmSymbols(t *testing.T) {
	skipIfGccgo(t, "gccgo does not use cmd/asm")