-@c Copyright 2000, 2002, 2003, 2006 Free Software Foundation, Inc.
+@c Copyright (C) 2000-2020 Free Software Foundation, Inc.
@c This is part of the GAS manual.
@c For copying conditions, see the file as.texinfo.
@c TI TMS320C54X description by Timothy Wall, twall@cygnus.com
* TIC54X-Directives:: Directives
* TIC54X-Macros:: Macro Features
* TIC54X-MMRegs:: Memory-mapped Registers
+* TIC54X-Syntax:: Syntax
@end menu
@node TIC54X-Opts
All addresses will be assumed to be > 16 bits, and the appropriate
relocation types will be used. This option is equivalent to using the
@samp{.far_mode} directive in the assembly code. If you do not use the
-@samp{-mfar-mode} option, all references will be assumed to be 16 bits.
+@samp{-mfar-mode} option, all references will be assumed to be 16 bits.
This option may be abbreviated to @samp{-mf}.
@cindex @samp{-mcpu} option, cpu
This option is equivalent to using the @samp{.version} directive in the
assembly code. For recognized CPU codes, see
@xref{TIC54X-Directives,,@code{.version}}. The default CPU version is
-@samp{542}.
+@samp{542}.
@cindex @samp{-merrors-to-file} option, stderr redirect
@cindex @samp{-me} option, stderr redirect
You can use the @samp{-merrors-to-file} option to redirect error output
to a file (this provided for those deficient environments which don't
provide adequate output redirection). This option may be abbreviated to
-@samp{-me}.
+@samp{-me}.
@node TIC54X-Block
@section Blocking
arbitrary string values. This is roughly equivalent to C preprocessor
#define macros. When @code{@value{AS}} encounters one of these
symbols, the symbol is replaced in the input stream by its string value.
-Subsym names @strong{must} begin with a letter.
+Subsym names @strong{must} begin with a letter.
Subsyms may be defined using the @code{.asg} and @code{.eval} directives
(@xref{TIC54X-Directives,,@code{.asg}},
-@xref{TIC54X-Directives,,@code{.eval}}.
+@xref{TIC54X-Directives,,@code{.eval}}.
Expansion is recursive until a previously encountered symbol is seen, at
-which point substitution stops.
+which point substitution stops.
In this example, x is replaced with SYM2; SYM2 is replaced with SYM1, and SYM1
is replaced with x. At this point, x has already been encountered
and the substitution stops.
-@smallexample @code
- .asg "x",SYM1
+@smallexample
+ .asg "x",SYM1
.asg "SYM1",SYM2
.asg "SYM2",x
add x,a ; final code assembled is "add x, a"
Substitution may be forced in situations where replacement might be
ambiguous by placing colons on either side of the subsym. The following
-code:
+code:
-@smallexample @code
+@smallexample
.eval "10",x
LAB:X: add #x, a
@end smallexample
When assembled becomes:
-@smallexample @code
+@smallexample
LAB10 add #10, a
@end smallexample
@item
$N, where N is a decimal number between 0 and 9
@item
-LABEL?, where LABEL is any legal symbol name.
+LABEL?, where LABEL is any legal symbol name.
@end itemize
Local labels thus defined may be redefined or automatically generated.
The following built-in functions may be used to generate a
floating-point value. All return a floating-point value except
@samp{$cvi}, @samp{$int}, and @samp{$sgn}, which return an integer
-value.
+value.
@table @code
@cindex @code{$acos} math builtin, TIC54X
of a label or address. For example, if an address @code{_label} resides
in extended program memory, the value of @code{_label} may be loaded as
follows:
-@smallexample @code
+@smallexample
ldx #_label,16,a ; loads extended bits of _label
or #_label,a ; loads lower 16 bits of _label
bacc a ; full address is in accumulator A
Align SPC to word boundary
@item 2
Align SPC to longword boundary (same as .even)
-@item 128
+@item 128
Align SPC to page boundary
@end table
performed on @var{string} before assignment.
@cindex @code{eval} directive, TIC54X
-@itemx .eval @var{string}, @var{name}
+@item .eval @var{string}, @var{name}
Evaluate the contents of string @var{string} and assign the result as a
string to the subsym @var{name}. String replacement is performed on
-@var{string} before assignment.
+@var{string} before assignment.
@cindex @code{bss} directive, TIC54X
@item .bss @var{symbol}, @var{size} [, [@var{blocking_flag}] [,@var{alignment_flag}]]
Place an IEEE single-precision floating-point representation of one or
more floating-point values into the current section. All but
@code{.xfloat} align the result on a longword boundary. Values are
-stored most-significant word first.
+stored most-significant word first.
@cindex @code{drlist} directive, TIC54X
@cindex @code{drnolist} directive, TIC54X
@itemx .uword @var{value} [,...,@var{value_n}]
Place one or more values into consecutive words of the current section.
If a label is used, it points to the word allocated for the first value
-encountered.
+encountered.
@cindex @code{label} directive, TIC54X
@item .label @var{symbol}
Place one or more 32-bit values into consecutive words in the current
section. The most significant word is stored first. @code{.long} and
@code{.ulong} align the result on a longword boundary; @code{xlong} does
-not.
+not.
@cindex @code{loop} directive, TIC54X
@cindex @code{break} directive, TIC54X
@cindex @code{mlist} directive, TIC54X
@cindex @code{mnolist} directive, TIC54X
@item .mlist
-@item .mnolist
+@itemx .mnolist
Control whether to include macro and loop block expansions in the
listing output. Ignored.
@item @var{symbol} .set "@var{value}"
@itemx @var{symbol} .equ "@var{value}"
Equate a constant @var{value} to a @var{symbol}, which is placed in the
-symbol table. @var{symbol} may not be previously defined.
+symbol table. @var{symbol} may not be previously defined.
@cindex @code{space} directive, TIC54X
@cindex @code{bes} directive, TIC54X
structure/union element within a structure, may be used to apply a
structure to a symbol. Once applied to @var{label}, the individual
structure elements may be applied to @var{label} to produce the desired
-offsets using @var{label} as the structure base.
+offsets using @var{label} as the structure base.
@cindex @code{tab} directive, TIC54X
@item .tab
@cindex @code{union} directive, TIC54X
@cindex @code{tag} directive, TIC54X
@cindex @code{endunion} directive, TIC54X
-@item [@var{utag}] .union
+@item [@var{utag}] .union
@itemx [@var{name_1}] element [@var{count_1}]
@itemx [@var{name_2}] element [@var{count_2}]
@itemx [@var{tname}] .tag @var{utagx}[,@var{tcount}]
size in words. @var{blocking_flag} indicates whether to block this
section on a page boundary (128 words) (@pxref{TIC54X-Block}).
@var{alignment flag} indicates whether the section should be
-longword-aligned.
+longword-aligned.
@cindex @code{var} directive, TIC54X
@item .var @var{sym}[,..., @var{sym_n}]
Define a subsym to be a local variable within a macro. See
-@xref{TIC54X-Macros}.
+@xref{TIC54X-Macros}.
@cindex @code{version} directive, TIC54X
@item .version @var{version}
@cindex TIC54X-specific macros
@cindex macros, TIC54X
-Macros do not require explicit dereferencing of arguments (i.e., \ARG).
+Macros do not require explicit dereferencing of arguments (i.e., \ARG).
During macro expansion, the macro parameters are converted to subsyms.
If the number of arguments passed the macro invocation exceeds the
@cindex @code{$symcmp} subsym builtin, TIC54X
@item @code{$symcmp(@var{str1},@var{str2})}
-Returns 0 if @var{str1} == @var{str2}, non-zero otherwise.
+Returns 0 if @var{str1} == @var{str2}, non-zero otherwise.
@cindex @code{$firstch} subsym builtin, TIC54X
@item @code{$firstch(@var{str},@var{ch})}
Returns index of the first occurrence of character constant @var{ch} in
-@var{str}.
+@var{str}.
@cindex @code{$lastch} subsym builtin, TIC54X
@item @code{$lastch(@var{str},@var{ch})}
Returns index of the last occurrence of character constant @var{ch} in
-@var{str}.
+@var{str}.
@cindex @code{$isdefed} subsym builtin, TIC54X
@item @code{$isdefed(@var{symbol})}
@table @code
@end table
+
+@node TIC54X-Syntax
+@section TIC54X Syntax
+@menu
+* TIC54X-Chars:: Special Characters
+@end menu
+
+@node TIC54X-Chars
+@subsection Special Characters
+
+@cindex line comment character, TIC54X
+@cindex TIC54X line comment character
+The presence of a @samp{;} appearing anywhere on a line indicates the
+start of a comment that extends to the end of that line.
+
+If a @samp{#} appears as the first character of a line then the whole
+line is treated as a comment, but in this case the line can also be a
+logical line number directive (@pxref{Comments}) or a preprocessor
+control command (@pxref{Preprocessing}).
+
+The presence of an asterisk (@samp{*}) at the start of a line also
+indicates a comment that extends to the end of that line.
+
+@cindex line separator, TIC54X
+@cindex statement separator, TIC54X
+@cindex TIC54X line separator
+The TIC54X assembler does not currently support a line separator
+character.
+
projects / deliverable / binutils-gdb.git / blobdiff