1 @c Copyright 2010 Free Software Foundation, Inc.
2 @c This is part of the GAS manual.
3 @c For copying conditions, see the file as.texinfo.
7 @chapter TIC6X Dependent Features
10 @node Machine Dependencies
11 @chapter TIC6X Dependent Features
15 @cindex TMS320C6X support
17 * TIC6X Options:: Options
18 * TIC6X Syntax:: Syntax
19 * TIC6X Directives:: Directives
23 @section TIC6X Options
25 @cindex options for TIC6X
29 @cindex @code{-march=} command line option, TIC6X
30 @item -march=@var{arch}
31 Enable (only) instructions from architecture @var{arch}. By default,
32 all instructions are permitted.
34 The following values of @var{arch} are accepted: @code{c62x},
35 @code{c64x}, @code{c64x+}, @code{c67x}, @code{c67x+}, @code{c674x}.
37 @cindex @code{-matomic} command line option, TIC6X
38 @cindex @code{-mno-atomic} command line option, TIC6X
41 Enable or disable the optional C64x+ atomic operation instructions.
42 By default, they are enabled if no @option{-march} option is given, or
43 if an architecture is specified with @option{-march} that implies
44 these instructions are present (currently, there are no such
45 architectures); they are disabled if an architecture is specified with
46 @option{-march} on which the instructions are optional or not
47 present. This option overrides such a default from the architecture,
48 independent of the order in which the @option{-march} or
49 @option{-matomic} or @option{-mno-atomic} options are passed.
51 @cindex TIC6X big-endian output
52 @cindex TIC6X little-endian output
53 @cindex big-endian output, TIC6X
54 @cindex little-endian output, TIC6X
56 @itemx -mlittle-endian
57 Generate code for the specified endianness. The default is
65 @cindex line comment character, TIC6X
66 @cindex TIC6X line comment character
67 The presence of a @samp{;} on a line indicates the start of a comment
68 that extends to the end of the current line. If a @samp{#} or
69 @samp{*} appears as the first character of a line, the whole line is
72 @cindex line separator, TIC6X
73 @cindex statement separator, TIC6X
74 @cindex TIC6X line separator
75 The @samp{@@} character can be used instead of a newline to separate
78 Instruction, register and functional unit names are case-insensitive.
79 @command{@value{AS}} requires fully-specified functional unit names,
80 such as @samp{.S1}, @samp{.L1X} or @samp{.D1T2}, on all instructions
81 using a functional unit.
83 For some instructions, there may be syntactic ambiguity between
84 register or functional unit names and the names of labels or other
85 symbols. To avoid this, enclose the ambiguous symbol name in
86 parentheses; register and functional unit names may not be enclosed in
89 @node TIC6X Directives
90 @section TIC6X Directives
92 @cindex machine directives, TIC6X
93 @cindex TIC6X machine directives
95 Directives controlling the set of instructions accepted by the
96 assembler have effect for instructions between the directive and any
97 subsequent directive overriding it.
101 @cindex @code{.arch} directive, TIC6X
102 @item .arch @var{arch}
103 This has the same effect as @option{-march=@var{arch}}.
105 @cindex @code{.atomic} directive, TIC6X
106 @cindex @code{.noatomic} directive, TIC6X
109 These have the same effects as @option{-matomic} and
110 @option{-mno-atomic}.
112 @cindex @code{.nocmp} directive, TIC6X
114 Disallow use of C64x+ compact instructions in the current text