b, err := syscall.Mmap(0, 0, 3*pagesize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANONYMOUS|syscall.MAP_PRIVATE)
	if err != nil {
		t.Fatalf("mmap failed %s", err)
	}
	err = syscall.Mprotect(b[:pagesize], syscall.PROT_NONE)
	if err != nil {
		t.Fatalf("mprotect low failed %s\n", err)
	}
	err = syscall.Mprotect(b[2*pagesize:], syscall.PROT_NONE)
	if err != nil {
		t.Fatalf("mprotect high failed %s\n", err)
	}

	VP4DPWSSDS (SP), [Z14-Z17], K1, Z0                 // 62f20f49530424
	VP4DPWSSDS -7(DI)(R8*1), [Z24-Z27], K1, Z0         // 62b23f41538407f9ffffff
	VP4DPWSSDS (SP), [Z24-Z27], K1, Z0                 // 62f23f41530424

	VSCATTERPF1QPS K3, (BP)(Z10*2)                     // 62b27d4bc7745500
	VSCATTERPF1QPS K3, (R10)(Z29*8)                    // 62927d43c734ea
	VSCATTERPF1QPS K3, (R14)(Z29*8)                    // 62927d43c734ee

		os.Exit(2)
	case "":
		// nothing
	case "index":
		// known to compiler; ignore here so people can use
		// the same list with -gcflags=-spectre=LIST and -asmflags=-spectrre=LIST
	case "all", "ret":
		ctxt.Retpoline = true
	}

	ctxt.Bso = bufio.NewWriter(os.Stdout)
	defer ctxt.Bso.Flush()

	architecture.Init(ctxt)

	// Create object file, write header.
	buf, err := bio.Create(*flags.OutputFile)

	VPCLMULQDQ $97, 7(SI)(DI*1), Z26, Z12              // 62732d4044a43e0700000061 or 6273ad4044a43e0700000061
	VPCLMULQDQ $97, 15(DX)(BX*8), Z26, Z12             // 62732d4044a4da0f00000061 or 6273ad4044a4da0f00000061