-@c Copyright 2009
+@c Copyright 2009, 2011
@c Free Software Foundation, Inc.
@c This is part of the GAS manual.
@c For copying conditions, see the file as.texinfo.
@samp{#} is the line comment character.
+If a @samp{#} appears as the first character of a line then the whole
+line is treated as a comment, but in this case the line could also be
+a logical line number directive (@pxref{Comments}) or a preprocessor
+control command (@pxref{Preprocessing}).
+
+@cindex line separator, s390
+@cindex statement separator, s390
+@cindex s390 line separator
+The @samp{;} character can be used instead of a newline to separate
+statements.
+
@node s390 Syntax
@section Instruction syntax
@cindex instruction syntax, s390
@item .ltorg
This directive causes the current contents of the literal pool to be
dumped to the current location (@ref{s390 Literal Pool Entries}).
+
+@cindex @code{.machine} directive, s390
+@item .machine string
+This directive allows you to change the machine for which code is
+generated. @code{string} may be any of the @code{-march=} selection
+options (without the -march=), @code{push}, or @code{pop}.
+@code{.machine push} saves the currently selected cpu, which may be
+restored with @code{.machine pop}. Be aware that the cpu string has
+to be put into double quotes in case it contains characters not
+appropriate for identifiers. So you have to write @code{"z9-109"}
+instead of just @code{z9-109}.
@end table
@node s390 Floating Point