var f Float
		if x != 0 {
			f.SetInt64(int64(x))
		}
		// x == 0 translates into the zero value
		return &f
	}
	for _, test := range []struct {
		z, x, y, want int
		opname        rune
		op            func(z, x, y *Float) *Float
	}{
		{0, 0, 0, 0, '+', (*Float).Add},
		{0, 1, 2, 3, '+', (*Float).Add},
		{1, 2, 0, 2, '+', (*Float).Add},
		{2, 0, 1, 1, '+', (*Float).Add},

	"bool":       {Size: 1, Align: 1, C: c("GoUint8")},
	"byte":       {Size: 1, Align: 1, C: c("GoUint8")},
	"int":        {Size: 0, Align: 0, C: c("GoInt")},
	"uint":       {Size: 0, Align: 0, C: c("GoUint")},
	"rune":       {Size: 4, Align: 4, C: c("GoInt32")},
	"int8":       {Size: 1, Align: 1, C: c("GoInt8")},
	"uint8":      {Size: 1, Align: 1, C: c("GoUint8")},
	"int16":      {Size: 2, Align: 2, C: c("GoInt16")},

	runtime.ExitSyscall()
	if r0 == 0 {
		return "", fmt.Errorf("%s (errno2=0x%x)\n", err1.Error(), err2)
	}
	s := string(termdev[:])
	idx := strings.Index(s, string(rune(0)))
	if idx == -1 {
		tty = s
	} else {
		tty = s[:idx]
	}
	return
}

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint64(length)
}