diff options
Diffstat (limited to 'gas/doc')
| -rw-r--r-- | gas/doc/as.texinfo | 108 |
1 files changed, 103 insertions, 5 deletions
diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo index 3084bcb..2470309 100644 --- a/gas/doc/as.texinfo +++ b/gas/doc/as.texinfo @@ -4404,6 +4404,9 @@ Some machine configurations provide additional directives. * CFI directives:: @code{.cfi_startproc [simple]}, @code{.cfi_endproc}, etc. * Comm:: @code{.comm @var{symbol} , @var{length} } * Data:: @code{.data @var{subsection}} +* Dc:: @code{.dc[@var{size}] @var{expressions}} +* Dcb:: @code{.dcb[@var{size}] @var{number} [,@var{fill}]} +* Ds:: @code{.ds[@var{size}] @var{number} [,@var{fill}]} @ifset COFF * Def:: @code{.def @var{name}} @end ifset @@ -4518,12 +4521,12 @@ Some machine configurations provide additional directives. * Size:: @code{.size [@var{name} , @var{expression}]} @end ifset @ifclear no-space-dir -* Skip:: @code{.skip @var{size} , @var{fill}} +* Skip:: @code{.skip @var{size} [,@var{fill}]} @end ifclear * Sleb128:: @code{.sleb128 @var{expressions}} @ifclear no-space-dir -* Space:: @code{.space @var{size} , @var{fill}} +* Space:: @code{.space @var{size} [,@var{fill}]} @end ifclear @ifset have-stabs * Stab:: @code{.stabd, .stabn, .stabs} @@ -5050,13 +5053,108 @@ The syntax for @code{.comm} differs slightly on the HPPA. The syntax is @node Data @section @code{.data @var{subsection}} - @cindex @code{data} directive + @code{.data} tells @command{@value{AS}} to assemble the following statements onto the end of the data subsection numbered @var{subsection} (which is an absolute expression). If @var{subsection} is omitted, it defaults to zero. +@node Dc +@section @code{.dc[@var{size}] @var{expressions}} +@cindex @code{dc} directive + +The @code{.dc} directive expects zero of more @var{expressions} separated by +commas. These expressions are evaluated and their values inserted into the +current section. The size of the emitted value depends upon the suffix to the +@code{.dc} directive: + +@table @code +@item @samp{.a} +Emits N-bit values, where N is the size of an address on the target system. +@item @samp{.b} +Emits 8-bit values. +@item @samp{.d} +Emits double precision floating-point values. +@item @samp{.l} +Emits 32-bit values. +@item @samp{.s} +Emits single precision floating-point values. +@item @samp{.w} +Emits 16-bit values. +Note - this is true even on targets where the @code{.word} directive would emit +32-bit values. +@item @samp{.x} +Emits long double precision floating-point values. +@end table + +If no suffix is used then @samp{.w} is assumed. + +The byte ordering is still target dependent, as is the size and format of +floating point values. + +@node Dcb +@section @code{.dcb[@var{size}] @var{number} [,@var{fill}]} +@cindex @code{dcb} directive +This directive emits @var{number} copies of @var{fill}, each of @var{size} +bytes. Both @var{number} and @var{fill} are absolute expressions. If the +comma and @var{fill} are omitted, @var{fill} is assumed to be zero. The +@var{size} suffix, if present, must be one of: + +@table @code +@item @samp{.b} +Emits single byte values. +@item @samp{.d} +Emits double-precision floating point values. +@item @samp{.l} +Emits 4-byte values. +@item @samp{.s} +Emits single-precision floating point values. +@item @samp{.w} +Emits 2-byte values. +@item @samp{.x} +Emits long double-precision floating point values. +@end table + +If the @var{size} suffix is omitted then @samp{.w} is assumed. + +The byte ordering is target dependent, as is the size and format of floating +point values. + +@node Ds +@section @code{.ds[@var{size}] @var{number} [,@var{fill}]} +@cindex @code{ds} directive +This directive emits @var{number} copies of @var{fill}, each of @var{size} +bytes. Both @var{number} and @var{fill} are absolute expressions. If the +comma and @var{fill} are omitted, @var{fill} is assumed to be zero. The +@var{size} suffix, if present, must be one of: + +@table @code +@item @samp{.b} +Emits single byte values. +@item @samp{.d} +Emits 8-byte values. +@item @samp{.l} +Emits 4-byte values. +@item @samp{.p} +Emits 12-byte values. +@item @samp{.s} +Emits 4-byte values. +@item @samp{.w} +Emits 2-byte values. +@item @samp{.x} +Emits 12-byte values. +@end table + +Note - unlike the @code{.dcb} directive the @samp{.d}, @samp{.s} and @samp{.x} +suffixes do not indicate that floating-point values are to inserted. + +If the @var{size} suffix is omitted then @samp{.w} is assumed. + +The byte ordering is target dependent, as is the size and format of floating +point values. + + @ifset COFF @node Def @section @code{.def @var{name}} @@ -6831,7 +6929,7 @@ symbols. @ifclear no-space-dir @node Skip -@section @code{.skip @var{size} , @var{fill}} +@section @code{.skip @var{size} [,@var{fill}]} @cindex @code{skip} directive @cindex filling memory @@ -6851,7 +6949,7 @@ symbolic debugging format. @xref{Uleb128, ,@code{.uleb128}}. @ifclear no-space-dir @node Space -@section @code{.space @var{size} , @var{fill}} +@section @code{.space @var{size} [,@var{fill}]} @cindex @code{space} directive @cindex filling memory |