91 lines
2.5 KiB
Text
91 lines
2.5 KiB
Text
|
@c Copyright (C) 2014-2022 Free Software Foundation, Inc.
|
||
|
|
@c This is part of the GAS manual.
|
||
|
|
@c For copying conditions, see the file as.texinfo.
|
||
|
|
@c man end
|
||
|
|
|
||
|
|
@ifset GENERIC
|
||
|
|
@page
|
||
|
|
@node Visium-Dependent
|
||
|
|
@chapter Visium Dependent Features
|
||
|
|
@end ifset
|
||
|
|
|
||
|
|
@ifclear GENERIC
|
||
|
|
@node Machine Dependencies
|
||
|
|
@chapter Visium Dependent Features
|
||
|
|
@end ifclear
|
||
|
|
|
||
|
|
@cindex Visium support
|
||
|
|
@menu
|
||
|
|
* Visium Options:: Options
|
||
|
|
* Visium Syntax:: Syntax
|
||
|
|
* Visium Opcodes:: Opcodes
|
||
|
|
@end menu
|
||
|
|
|
||
|
|
@node Visium Options
|
||
|
|
@section Options
|
||
|
|
@cindex Visium options
|
||
|
|
@cindex options for Visium
|
||
|
|
|
||
|
|
The Visium assembler implements one machine-specific option:
|
||
|
|
|
||
|
|
@c man begin OPTIONS
|
||
|
|
@table @gcctabopt
|
||
|
|
@cindex @code{-mtune=@var{arch}} command-line option, Visium
|
||
|
|
@item -mtune=@var{arch}
|
||
|
|
This option specifies the target architecture. If an attempt is made to
|
||
|
|
assemble an instruction that will not execute on the target architecture,
|
||
|
|
the assembler will issue an error message.
|
||
|
|
|
||
|
|
The following names are recognized:
|
||
|
|
@code{mcm24}
|
||
|
|
@code{mcm}
|
||
|
|
@code{gr5}
|
||
|
|
@code{gr6}
|
||
|
|
@end table
|
||
|
|
@c man end
|
||
|
|
|
||
|
|
@node Visium Syntax
|
||
|
|
@section Syntax
|
||
|
|
|
||
|
|
@menu
|
||
|
|
* Visium Characters:: Special Characters
|
||
|
|
* Visium Registers:: Register Names
|
||
|
|
@end menu
|
||
|
|
|
||
|
|
@node Visium Characters
|
||
|
|
@subsection Special Characters
|
||
|
|
|
||
|
|
@cindex line comment character, Visium
|
||
|
|
@cindex Visium line comment character
|
||
|
|
Line comments are introduced either by the @samp{!} character or by the
|
||
|
|
@samp{;} character appearing anywhere on a line.
|
||
|
|
|
||
|
|
A hash character (@samp{#}) as the first character on a line also
|
||
|
|
marks the start of a line comment, but in this case it could also be a
|
||
|
|
logical line number directive (@pxref{Comments}) or a preprocessor
|
||
|
|
control command (@pxref{Preprocessing}).
|
||
|
|
|
||
|
|
@cindex line separator, Visium
|
||
|
|
@cindex statement separator, Visium
|
||
|
|
@cindex Visium line separator
|
||
|
|
The Visium assembler does not currently support a line separator character.
|
||
|
|
|
||
|
|
@node Visium Registers
|
||
|
|
@subsection Register Names
|
||
|
|
@cindex Visium registers
|
||
|
|
@cindex register names, Visium
|
||
|
|
Registers can be specified either by using their canonical mnemonic names
|
||
|
|
or by using their alias if they have one, for example @samp{sp}.
|
||
|
|
|
||
|
|
@node Visium Opcodes
|
||
|
|
@section Opcodes
|
||
|
|
All the standard opcodes of the architecture are implemented, along with the
|
||
|
|
following three pseudo-instructions: @code{cmp}, @code{cmpc}, @code{move}.
|
||
|
|
|
||
|
|
In addition, the following two illegal opcodes are implemented and used by the simulation:
|
||
|
|
|
||
|
|
@example
|
||
|
|
stop 5-bit immediate, SourceA
|
||
|
|
trace 5-bit immediate, SourceA
|
||
|
|
@end example
|