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Diffstat (limited to 'gas/doc/c-m68k.texi')
| -rw-r--r-- | gas/doc/c-m68k.texi | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/gas/doc/c-m68k.texi b/gas/doc/c-m68k.texi index d3c849c..d4da2a1 100644 --- a/gas/doc/c-m68k.texi +++ b/gas/doc/c-m68k.texi @@ -32,6 +32,50 @@ dependent options: @table @samp +@cindex @samp{-march=} command line option, M680x0 +@item -march=@var{architecture} +This option specifies a target architecture. The following +architectures are recognized: +@code{68000}, +@code{68010}, +@code{68020}, +@code{68030}, +@code{68040}, +@code{68060}, +@code{cpu32}, +@code{isaa}, +@code{isaaplus}, +@code{isab} and +@code{cfv4e}. + + +@cindex @samp{-mcpu=} command line option, M680x0 +@item -mcpu=@var{cpu} +This option specifies a target cpu. When used in conjunction with the +@option{-march} option, the cpu must be within the specified +architecture. Also, the generic features of the architecture are used +for instruction generation, rather than those of the specific chip. + +@cindex @samp{-m[no-]68851} command line option, M680x0 +@cindex @samp{-m[no-]68881} command line option, M680x0 +@cindex @samp{-m[no-]div} command line option, M680x0 +@cindex @samp{-m[no-]usp} command line option, M680x0 +@cindex @samp{-m[no-]float} command line option, M680x0 +@cindex @samp{-m[no-]mac} command line option, M680x0 +@cindex @samp{-m[no-]emac} command line option, M680x0 +@item -m[no-]68851 +@item -m[no-]68881 +@item -m[no-]div +@item -m[no-]usp +@item -m[no-]float +@item -m[no-]mac +@item -m[no-]emac + +Enable or disable various architecture specific features. If a chip +or architecture by default supports an option (for instance +@option{-march=isaaplus} includes the @option{-mdiv} option), +explicitly disabling the option will override the default. + @cindex @samp{-l} option, M680x0 @item -l You can use the @samp{-l} option to shorten the size of references to undefined @@ -398,6 +442,25 @@ aligns the output to an even byte boundary. @cindex @code{skip} directive, M680x0 @item .skip This directive is identical to a @code{.space} directive. + +@cindex @code{arch} directive, M680x0 +@item .arch @var{name} +Select the target architecture and extension features. Valid valuse +for @var{name} are the same as for the @option{-march} command line +option. This directive cannot be specified after +any instructions have been assembled. If it is given multiple times, +or in conjuction with the @option{-march} option, all uses must be for +the same architecture and extension set. + +@cindex @code{cpu} directive, M680x0 +@item .cpu @var{name} +Select the target cpu. Valid valuse +for @var{name} are the same as for the @option{-mcpu} command line +option. This directive cannot be specified after +any instructions have been assembled. If it is given multiple times, +or in conjuction with the @option{-mopt} option, all uses must be for +the same cpu. + @end table @need 2000 |