This directive will set the @code{isa} register in the @code{.debug_line}
state machine to @var{value}, which must be an unsigned integer.
+@item discriminator @var{value}
+This directive will set the @code{discriminator} register in the @code{.debug_line}
+state machine to @var{value}, which must be an unsigned integer.
+
@end table
@node Loc_mark_labels