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<a name="TIC54X_002dDirectives"></a>Next:&nbsp;<a rel="next" accesskey="n" href="TIC54X_002dMacros.html#TIC54X_002dMacros">TIC54X-Macros</a>,
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<h4 class="subsection">9.31.9 Directives</h4>
<p><a name="index-machine-directives_002c-TIC54X-1581"></a><a name="index-TIC54X-machine-directives-1582"></a>
<a name="index-_0040code_007balign_007d-directive_002c-TIC54X-1583"></a>
<a name="index-_0040code_007beven_007d-directive_002c-TIC54X-1584"></a>
<dl><dt><code>.align [</code><var>size</var><code>]</code><dt><code>.even</code><dd>Align the section program counter on the next boundary, based on
<var>size</var>. <var>size</var> may be any power of 2. <code>.even</code> is
equivalent to <code>.align</code> with a <var>size</var> of 2.
<dl>
<dt><code>1</code><dd>Align SPC to word boundary
<br><dt><code>2</code><dd>Align SPC to longword boundary (same as .even)
<br><dt><code>128</code><dd>Align SPC to page boundary
</dl>
<p><a name="index-_0040code_007basg_007d-directive_002c-TIC54X-1585"></a><br><dt><code>.asg </code><var>string</var><code>, </code><var>name</var><dd>Assign <var>name</var> the string <var>string</var>. String replacement is
performed on <var>string</var> before assignment.
<p><a name="index-_0040code_007beval_007d-directive_002c-TIC54X-1586"></a><dt><code>.eval </code><var>string</var><code>, </code><var>name</var><dd>Evaluate the contents of string <var>string</var> and assign the result as a
string to the subsym <var>name</var>. String replacement is performed on
<var>string</var> before assignment.
<p><a name="index-_0040code_007bbss_007d-directive_002c-TIC54X-1587"></a><br><dt><code>.bss </code><var>symbol</var><code>, </code><var>size</var><code> [, [</code><var>blocking_flag</var><code>] [,</code><var>alignment_flag</var><code>]]</code><dd>Reserve space for <var>symbol</var> in the .bss section. <var>size</var> is in
words. If present, <var>blocking_flag</var> indicates the allocated space
should be aligned on a page boundary if it would otherwise cross a page
boundary. If present, <var>alignment_flag</var> causes the assembler to
allocate <var>size</var> on a long word boundary.
<p><a name="index-_0040code_007bbyte_007d-directive_002c-TIC54X-1588"></a><a name="index-_0040code_007bubyte_007d-directive_002c-TIC54X-1589"></a><a name="index-_0040code_007bchar_007d-directive_002c-TIC54X-1590"></a><a name="index-_0040code_007buchar_007d-directive_002c-TIC54X-1591"></a><br><dt><code>.byte </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.ubyte </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.char </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.uchar </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dd>Place one or more bytes into consecutive words of the current section.
The upper 8 bits of each word is zero-filled. If a label is used, it
points to the word allocated for the first byte encountered.
<p><a name="index-_0040code_007bclink_007d-directive_002c-TIC54X-1592"></a><br><dt><code>.clink ["</code><var>section_name</var><code>"]</code><dd>Set STYP_CLINK flag for this section, which indicates to the linker that
if no symbols from this section are referenced, the section should not
be included in the link. If <var>section_name</var> is omitted, the current
section is used.
<p><a name="index-_0040code_007bc_005fmode_007d-directive_002c-TIC54X-1593"></a><br><dt><code>.c_mode</code><dd>TBD.
<p><a name="index-_0040code_007bcopy_007d-directive_002c-TIC54X-1594"></a><br><dt><code>.copy "</code><var>filename</var><code>" | </code><var>filename</var><dt><code>.include "</code><var>filename</var><code>" | </code><var>filename</var><dd>Read source statements from <var>filename</var>. The normal include search
path is used. Normally .copy will cause statements from the included
file to be printed in the assembly listing and .include will not, but
this distinction is not currently implemented.
<p><a name="index-_0040code_007bdata_007d-directive_002c-TIC54X-1595"></a><br><dt><code>.data</code><dd>Begin assembling code into the .data section.
<p><a name="index-_0040code_007bdouble_007d-directive_002c-TIC54X-1596"></a><a name="index-_0040code_007bldouble_007d-directive_002c-TIC54X-1597"></a><a name="index-_0040code_007bfloat_007d-directive_002c-TIC54X-1598"></a><a name="index-_0040code_007bxfloat_007d-directive_002c-TIC54X-1599"></a><br><dt><code>.double </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.ldouble </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.float </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.xfloat </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dd>Place an IEEE single-precision floating-point representation of one or
more floating-point values into the current section. All but
<code>.xfloat</code> align the result on a longword boundary. Values are
stored most-significant word first.
<p><a name="index-_0040code_007bdrlist_007d-directive_002c-TIC54X-1600"></a><a name="index-_0040code_007bdrnolist_007d-directive_002c-TIC54X-1601"></a><br><dt><code>.drlist</code><dt><code>.drnolist</code><dd>Control printing of directives to the listing file. Ignored.
<p><a name="index-_0040code_007bemsg_007d-directive_002c-TIC54X-1602"></a><a name="index-_0040code_007bmmsg_007d-directive_002c-TIC54X-1603"></a><a name="index-_0040code_007bwmsg_007d-directive_002c-TIC54X-1604"></a><br><dt><code>.emsg </code><var>string</var><dt><code>.mmsg </code><var>string</var><dt><code>.wmsg </code><var>string</var><dd>Emit a user-defined error, message, or warning, respectively.
<p><a name="index-_0040code_007bfar_005fmode_007d-directive_002c-TIC54X-1605"></a><br><dt><code>.far_mode</code><dd>Use extended addressing when assembling statements. This should appear
only once per file, and is equivalent to the -mfar-mode option see <a href="TIC54X_002dOpts.html#TIC54X_002dOpts"><code>-mfar-mode</code></a>.
<p><a name="index-_0040code_007bfclist_007d-directive_002c-TIC54X-1606"></a><a name="index-_0040code_007bfcnolist_007d-directive_002c-TIC54X-1607"></a><br><dt><code>.fclist</code><dt><code>.fcnolist</code><dd>Control printing of false conditional blocks to the listing file.
<p><a name="index-_0040code_007bfield_007d-directive_002c-TIC54X-1608"></a><br><dt><code>.field </code><var>value</var><code> [,</code><var>size</var><code>]</code><dd>Initialize a bitfield of <var>size</var> bits in the current section. If
<var>value</var> is relocatable, then <var>size</var> must be 16. <var>size</var>
defaults to 16 bits. If <var>value</var> does not fit into <var>size</var> bits,
the value will be truncated. Successive <code>.field</code> directives will
pack starting at the current word, filling the most significant bits
first, and aligning to the start of the next word if the field size does
not fit into the space remaining in the current word. A <code>.align</code>
directive with an operand of 1 will force the next <code>.field</code>
directive to begin packing into a new word. If a label is used, it
points to the word that contains the specified field.
<p><a name="index-_0040code_007bglobal_007d-directive_002c-TIC54X-1609"></a><a name="index-_0040code_007bdef_007d-directive_002c-TIC54X-1610"></a><a name="index-_0040code_007bref_007d-directive_002c-TIC54X-1611"></a><br><dt><code>.global </code><var>symbol</var><code> [,...,</code><var>symbol_n</var><code>]</code><dt><code>.def </code><var>symbol</var><code> [,...,</code><var>symbol_n</var><code>]</code><dt><code>.ref </code><var>symbol</var><code> [,...,</code><var>symbol_n</var><code>]</code><dd><code>.def</code> nominally identifies a symbol defined in the current file
and available to other files. <code>.ref</code> identifies a symbol used in
the current file but defined elsewhere. Both map to the standard
<code>.global</code> directive.
<p><a name="index-_0040code_007bhalf_007d-directive_002c-TIC54X-1612"></a><a name="index-_0040code_007buhalf_007d-directive_002c-TIC54X-1613"></a><a name="index-_0040code_007bshort_007d-directive_002c-TIC54X-1614"></a><a name="index-_0040code_007bushort_007d-directive_002c-TIC54X-1615"></a><a name="index-_0040code_007bint_007d-directive_002c-TIC54X-1616"></a><a name="index-_0040code_007buint_007d-directive_002c-TIC54X-1617"></a><a name="index-_0040code_007bword_007d-directive_002c-TIC54X-1618"></a><a name="index-_0040code_007buword_007d-directive_002c-TIC54X-1619"></a><br><dt><code>.half </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.uhalf </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.short </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.ushort </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.int </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.uint </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.word </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.uword </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dd>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.
<p><a name="index-_0040code_007blabel_007d-directive_002c-TIC54X-1620"></a><br><dt><code>.label </code><var>symbol</var><dd>Define a special <var>symbol</var> to refer to the load time address of the
current section program counter.
<p><a name="index-_0040code_007blength_007d-directive_002c-TIC54X-1621"></a><a name="index-_0040code_007bwidth_007d-directive_002c-TIC54X-1622"></a><br><dt><code>.length</code><dt><code>.width</code><dd>Set the page length and width of the output listing file. Ignored.
<p><a name="index-_0040code_007blist_007d-directive_002c-TIC54X-1623"></a><a name="index-_0040code_007bnolist_007d-directive_002c-TIC54X-1624"></a><br><dt><code>.list</code><dt><code>.nolist</code><dd>Control whether the source listing is printed. Ignored.
<p><a name="index-_0040code_007blong_007d-directive_002c-TIC54X-1625"></a><a name="index-_0040code_007bulong_007d-directive_002c-TIC54X-1626"></a><a name="index-_0040code_007bxlong_007d-directive_002c-TIC54X-1627"></a><br><dt><code>.long </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.ulong </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dt><code>.xlong </code><var>value</var><code> [,...,</code><var>value_n</var><code>]</code><dd>Place one or more 32-bit values into consecutive words in the current
section. The most significant word is stored first. <code>.long</code> and
<code>.ulong</code> align the result on a longword boundary; <code>xlong</code> does
not.
<p><a name="index-_0040code_007bloop_007d-directive_002c-TIC54X-1628"></a><a name="index-_0040code_007bbreak_007d-directive_002c-TIC54X-1629"></a><a name="index-_0040code_007bendloop_007d-directive_002c-TIC54X-1630"></a><br><dt><code>.loop [</code><var>count</var><code>]</code><dt><code>.break [</code><var>condition</var><code>]</code><dt><code>.endloop</code><dd>Repeatedly assemble a block of code. <code>.loop</code> begins the block, and
<code>.endloop</code> marks its termination. <var>count</var> defaults to 1024,
and indicates the number of times the block should be repeated.
<code>.break</code> terminates the loop so that assembly begins after the
<code>.endloop</code> directive. The optional <var>condition</var> will cause the
loop to terminate only if it evaluates to zero.
<p><a name="index-_0040code_007bmacro_007d-directive_002c-TIC54X-1631"></a><a name="index-_0040code_007bendm_007d-directive_002c-TIC54X-1632"></a><br><dt><var>macro_name</var><code> .macro [</code><var>param1</var><code>][,...</code><var>param_n</var><code>]</code><dt><code>[.mexit]</code><dt><code>.endm</code><dd>See the section on macros for more explanation (See <a href="TIC54X_002dMacros.html#TIC54X_002dMacros">TIC54X-Macros</a>.
<p><a name="index-_0040code_007bmlib_007d-directive_002c-TIC54X-1633"></a><br><dt><code>.mlib "</code><var>filename</var><code>" | </code><var>filename</var><dd>Load the macro library <var>filename</var>. <var>filename</var> must be an
archived library (BFD ar-compatible) of text files, expected to contain
only macro definitions. The standard include search path is used.
<p><a name="index-_0040code_007bmlist_007d-directive_002c-TIC54X-1634"></a><a name="index-_0040code_007bmnolist_007d-directive_002c-TIC54X-1635"></a><br><dt><code>.mlist</code><br><dt><code>.mnolist</code><dd>Control whether to include macro and loop block expansions in the
listing output. Ignored.
<p><a name="index-_0040code_007bmmregs_007d-directive_002c-TIC54X-1636"></a><br><dt><code>.mmregs</code><dd>Define global symbolic names for the 'c54x registers. Supposedly
equivalent to executing <code>.set</code> directives for each register with
its memory-mapped value, but in reality is provided only for
compatibility and does nothing.
<p><a name="index-_0040code_007bnewblock_007d-directive_002c-TIC54X-1637"></a><br><dt><code>.newblock</code><dd>This directive resets any TIC54X local labels currently defined. Normal
<code>as</code> local labels are unaffected.
<p><a name="index-_0040code_007boption_007d-directive_002c-TIC54X-1638"></a><br><dt><code>.option </code><var>option_list</var><dd>Set listing options. Ignored.
<p><a name="index-_0040code_007bsblock_007d-directive_002c-TIC54X-1639"></a><br><dt><code>.sblock "</code><var>section_name</var><code>" | </code><var>section_name</var><code> [,"</code><var>name_n</var><code>" | </code><var>name_n</var><code>]</code><dd>Designate <var>section_name</var> for blocking. Blocking guarantees that a
section will start on a page boundary (128 words) if it would otherwise
cross a page boundary. Only initialized sections may be designated with
this directive. See also See <a href="TIC54X_002dBlock.html#TIC54X_002dBlock">TIC54X-Block</a>.
<p><a name="index-_0040code_007bsect_007d-directive_002c-TIC54X-1640"></a><br><dt><code>.sect "</code><var>section_name</var><code>"</code><dd>Define a named initialized section and make it the current section.
<p><a name="index-_0040code_007bset_007d-directive_002c-TIC54X-1641"></a><a name="index-_0040code_007bequ_007d-directive_002c-TIC54X-1642"></a><br><dt><var>symbol</var><code> .set "</code><var>value</var><code>"</code><dt><var>symbol</var><code> .equ "</code><var>value</var><code>"</code><dd>Equate a constant <var>value</var> to a <var>symbol</var>, which is placed in the
symbol table. <var>symbol</var> may not be previously defined.
<p><a name="index-_0040code_007bspace_007d-directive_002c-TIC54X-1643"></a><a name="index-_0040code_007bbes_007d-directive_002c-TIC54X-1644"></a><br><dt><code>.space </code><var>size_in_bits</var><dt><code>.bes </code><var>size_in_bits</var><dd>Reserve the given number of bits in the current section and zero-fill
them. If a label is used with <code>.space</code>, it points to the
<strong>first</strong> word reserved. With <code>.bes</code>, the label points to the
<strong>last</strong> word reserved.
<p><a name="index-_0040code_007bsslist_007d-directive_002c-TIC54X-1645"></a><a name="index-_0040code_007bssnolist_007d-directive_002c-TIC54X-1646"></a><br><dt><code>.sslist</code><dt><code>.ssnolist</code><dd>Controls the inclusion of subsym replacement in the listing output. Ignored.
<p><a name="index-_0040code_007bstring_007d-directive_002c-TIC54X-1647"></a><a name="index-_0040code_007bpstring_007d-directive_002c-TIC54X-1648"></a><br><dt><code>.string "</code><var>string</var><code>" [,...,"</code><var>string_n</var><code>"]</code><dt><code>.pstring "</code><var>string</var><code>" [,...,"</code><var>string_n</var><code>"]</code><dd>Place 8-bit characters from <var>string</var> into the current section.
<code>.string</code> zero-fills the upper 8 bits of each word, while
<code>.pstring</code> puts two characters into each word, filling the
most-significant bits first. Unused space is zero-filled. If a label
is used, it points to the first word initialized.
<p><a name="index-_0040code_007bstruct_007d-directive_002c-TIC54X-1649"></a><a name="index-_0040code_007btag_007d-directive_002c-TIC54X-1650"></a><a name="index-_0040code_007bendstruct_007d-directive_002c-TIC54X-1651"></a><br><dt><code>[</code><var>stag</var><code>] .struct [</code><var>offset</var><code>]</code><dt><code>[</code><var>name_1</var><code>] element [</code><var>count_1</var><code>]</code><dt><code>[</code><var>name_2</var><code>] element [</code><var>count_2</var><code>]</code><dt><code>[</code><var>tname</var><code>] .tag </code><var>stagx</var><code> [</code><var>tcount</var><code>]</code><dt><code>...</code><dt><code>[</code><var>name_n</var><code>] element [</code><var>count_n</var><code>]</code><dt><code>[</code><var>ssize</var><code>] .endstruct</code><dt><var>label</var><code> .tag [</code><var>stag</var><code>]</code><dd>Assign symbolic offsets to the elements of a structure. <var>stag</var>
defines a symbol to use to reference the structure. <var>offset</var>
indicates a starting value to use for the first element encountered;
otherwise it defaults to zero. Each element can have a named offset,
<var>name</var>, which is a symbol assigned the value of the element's offset
into the structure. If <var>stag</var> is missing, these become global
symbols. <var>count</var> adjusts the offset that many times, as if
<code>element</code> were an array. <code>element</code> may be one of
<code>.byte</code>, <code>.word</code>, <code>.long</code>, <code>.float</code>, or any
equivalent of those, and the structure offset is adjusted accordingly.
<code>.field</code> and <code>.string</code> are also allowed; the size of
<code>.field</code> is one bit, and <code>.string</code> is considered to be one
word in size. Only element descriptors, structure/union tags,
<code>.align</code> and conditional assembly directives are allowed within
<code>.struct</code>/<code>.endstruct</code>. <code>.align</code> aligns member offsets
to word boundaries only. <var>ssize</var>, if provided, will always be
assigned the size of the structure.
<p>The <code>.tag</code> directive, in addition to being used to define a
structure/union element within a structure, may be used to apply a
structure to a symbol. Once applied to <var>label</var>, the individual
structure elements may be applied to <var>label</var> to produce the desired
offsets using <var>label</var> as the structure base.
<p><a name="index-_0040code_007btab_007d-directive_002c-TIC54X-1652"></a><br><dt><code>.tab</code><dd>Set the tab size in the output listing. Ignored.
<p><a name="index-_0040code_007bunion_007d-directive_002c-TIC54X-1653"></a><a name="index-_0040code_007btag_007d-directive_002c-TIC54X-1654"></a><a name="index-_0040code_007bendunion_007d-directive_002c-TIC54X-1655"></a><br><dt><code>[</code><var>utag</var><code>] .union</code><dt><code>[</code><var>name_1</var><code>] element [</code><var>count_1</var><code>]</code><dt><code>[</code><var>name_2</var><code>] element [</code><var>count_2</var><code>]</code><dt><code>[</code><var>tname</var><code>] .tag </code><var>utagx</var><code>[,</code><var>tcount</var><code>]</code><dt><code>...</code><dt><code>[</code><var>name_n</var><code>] element [</code><var>count_n</var><code>]</code><dt><code>[</code><var>usize</var><code>] .endstruct</code><dt><var>label</var><code> .tag [</code><var>utag</var><code>]</code><dd>Similar to <code>.struct</code>, but the offset after each element is reset to
zero, and the <var>usize</var> is set to the maximum of all defined elements.
Starting offset for the union is always zero.
<p><a name="index-_0040code_007busect_007d-directive_002c-TIC54X-1656"></a><br><dt><code>[</code><var>symbol</var><code>] .usect "</code><var>section_name</var><code>", </code><var>size</var><code>, [,[</code><var>blocking_flag</var><code>] [,</code><var>alignment_flag</var><code>]]</code><dd>Reserve space for variables in a named, uninitialized section (similar to
.bss). <code>.usect</code> allows definitions sections independent of .bss.
<var>symbol</var> points to the first location reserved by this allocation.
The symbol may be used as a variable name. <var>size</var> is the allocated
size in words. <var>blocking_flag</var> indicates whether to block this
section on a page boundary (128 words) (see <a href="TIC54X_002dBlock.html#TIC54X_002dBlock">TIC54X-Block</a>).
<var>alignment flag</var> indicates whether the section should be
longword-aligned.
<p><a name="index-_0040code_007bvar_007d-directive_002c-TIC54X-1657"></a><br><dt><code>.var </code><var>sym</var><code>[,..., </code><var>sym_n</var><code>]</code><dd>Define a subsym to be a local variable within a macro. See
See <a href="TIC54X_002dMacros.html#TIC54X_002dMacros">TIC54X-Macros</a>.
<p><a name="index-_0040code_007bversion_007d-directive_002c-TIC54X-1658"></a><br><dt><code>.version </code><var>version</var><dd>Set which processor to build instructions for. Though the following
values are accepted, the op is ignored.
<dl>
<dt><code>541</code><dt><code>542</code><dt><code>543</code><dt><code>545</code><dt><code>545LP</code><dt><code>546LP</code><dt><code>548</code><dt><code>549</code><dd></dl>
</dl>
</body></html>