| @c Copyright 2000, 2001 Free Software Foundation, Inc. |
| @c This is part of the GAS manual. |
| @c For copying conditions, see the file as.texinfo. |
| |
| @ifset GENERIC |
| @page |
| @node ARC-Dependent |
| @chapter ARC Dependent Features |
| @end ifset |
| |
| @ifclear GENERIC |
| @node Machine Dependencies |
| @chapter ARC Dependent Features |
| @end ifclear |
| |
| @set ARC_CORE_DEFAULT 6 |
| |
| @cindex ARC support |
| @menu |
| * ARC Options:: Options |
| * ARC Syntax:: Syntax |
| * ARC Floating Point:: Floating Point |
| * ARC Directives:: ARC Machine Directives |
| * ARC Opcodes:: Opcodes |
| @end menu |
| |
| |
| @node ARC Options |
| @section Options |
| @cindex ARC options (none) |
| @cindex options for ARC (none) |
| |
| @table @code |
| |
| @cindex @code{-marc[5|6|7|8]} command line option, ARC |
| @item -marc[5|6|7|8] |
| This option selects the core processor variant. Using |
| @code{-marc} is the same as @code{-marc@value{ARC_CORE_DEFAULT}}, which |
| is also the default. |
| |
| @table @code |
| |
| @cindex @code{arc5} arc5, ARC |
| @item arc5 |
| Base instruction set. |
| |
| @cindex @code{arc6} arc6, ARC |
| @item arc6 |
| Jump-and-link (jl) instruction. No requirement of an instruction between |
| setting flags and conditional jump. For example: |
| |
| @smallexample |
| mov.f r0,r1 |
| beq foo |
| @end smallexample |
| |
| @cindex @code{arc7} arc7, ARC |
| @item arc7 |
| Break (brk) and sleep (sleep) instructions. |
| |
| @cindex @code{arc8} arc8, ARC |
| @item arc8 |
| Software interrupt (swi) instruction. |
| |
| @end table |
| |
| Note: the @code{.option} directive can to be used to select a core |
| variant from within assembly code. |
| |
| @cindex @code{-EB} command line option, ARC |
| @item -EB |
| This option specifies that the output generated by the assembler should |
| be marked as being encoded for a big-endian processor. |
| |
| @cindex @code{-EL} command line option, ARC |
| @item -EL |
| This option specifies that the output generated by the assembler should |
| be marked as being encoded for a little-endian processor - this is the |
| default. |
| |
| @end table |
| |
| |
| @node ARC Syntax |
| @section Syntax |
| @menu |
| * ARC-Chars:: Special Characters |
| * ARC-Regs:: Register Names |
| @end menu |
| |
| @node ARC-Chars |
| @subsection Special Characters |
| |
| @cindex ARC special characters |
| @cindex special characters, ARC |
| *TODO* |
| |
| @node ARC-Regs |
| @subsection Register Names |
| |
| @cindex ARC register names |
| @cindex register names, ARC |
| *TODO* |
| |
| |
| @node ARC Floating Point |
| @section Floating Point |
| |
| @cindex floating point, ARC (@sc{ieee}) |
| @cindex ARC floating point (@sc{ieee}) |
| The ARC core does not currently have hardware floating point |
| support. Software floating point support is provided by @code{GCC} |
| and uses @sc{ieee} floating-point numbers. |
| |
| |
| @node ARC Directives |
| @section ARC Machine Directives |
| |
| @cindex machine directives, ARC |
| @cindex ARC machine directives |
| The ARC version of @code{@value{AS}} supports the following additional |
| machine directives: |
| |
| @table @code |
| |
| @cindex @code{2byte} directive, ARC |
| @item .2byte @var{expressions} |
| *TODO* |
| |
| @cindex @code{3byte} directive, ARC |
| @item .3byte @var{expressions} |
| *TODO* |
| |
| @cindex @code{4byte} directive, ARC |
| @item .4byte @var{expressions} |
| *TODO* |
| |
| @cindex @code{extAuxRegister} directive, ARC |
| @item .extAuxRegister @var{name},@var{address},@var{mode} |
| *TODO* |
| |
| @smallexample |
| .extAuxRegister mulhi,0x12,w |
| @end smallexample |
| |
| @cindex @code{extCondCode} directive, ARC |
| @item .extCondCode @var{suffix},@var{value} |
| *TODO* |
| |
| @smallexample |
| .extCondCode is_busy,0x14 |
| @end smallexample |
| |
| @cindex @code{extCoreRegister} directive, ARC |
| @item .extCoreRegister @var{name},@var{regnum},@var{mode},@var{shortcut} |
| *TODO* |
| |
| @smallexample |
| .extCoreRegister mlo,57,r,can_shortcut |
| @end smallexample |
| |
| @cindex @code{extInstruction} directive, ARC |
| @item .extInstruction @var{name},@var{opcode},@var{subopcode},@var{suffixclass},@var{syntaxclass} |
| *TODO* |
| |
| @smallexample |
| .extInstruction mul64,0x14,0x0,SUFFIX_COND,SYNTAX_3OP|OP1_MUST_BE_IMM |
| @end smallexample |
| |
| @cindex @code{half} directive, ARC |
| @item .half @var{expressions} |
| *TODO* |
| |
| @cindex @code{long} directive, ARC |
| @item .long @var{expressions} |
| *TODO* |
| |
| @cindex @code{option} directive, ARC |
| @item .option @var{arc|arc5|arc6|arc7|arc8} |
| The @code{.option} directive must be followed by the desired core |
| version. Again @code{arc} is an alias for |
| @code{arc@value{ARC_CORE_DEFAULT}}. |
| |
| Note: the @code{.option} directive overrides the command line option |
| @code{-marc}; a warning is emitted when the version is not consistent |
| between the two - even for the implicit default core version |
| (arc@value{ARC_CORE_DEFAULT}). |
| |
| @cindex @code{short} directive, ARC |
| @item .short @var{expressions} |
| *TODO* |
| |
| @cindex @code{word} directive, ARC |
| @item .word @var{expressions} |
| *TODO* |
| |
| @end table |
| |
| |
| @node ARC Opcodes |
| @section Opcodes |
| |
| @cindex ARC opcodes |
| @cindex opcodes for ARC |
| |
| For information on the ARC instruction set, see @cite{ARC Programmers |
| Reference Manual}, ARC Cores Ltd. |