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| <title>Using as: TIC54X-Directives</title> |
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| Next: <a href="TIC54X_002dMacros.html#TIC54X_002dMacros" accesskey="n" rel="next">TIC54X-Macros</a>, Previous: <a href="TIC54X_002dExt.html#TIC54X_002dExt" accesskey="p" rel="prev">TIC54X-Ext</a>, Up: <a href="TIC54X_002dDependent.html#TIC54X_002dDependent" accesskey="u" rel="up">TIC54X-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> |
| </div> |
| <hr> |
| <a name="Directives-2"></a> |
| <h4 class="subsection">9.42.9 Directives</h4> |
| |
| <a name="index-machine-directives_002c-TIC54X"></a> |
| <a name="index-TIC54X-machine-directives"></a> |
| |
| <dl compact="compact"> |
| <dd> |
| <a name="index-align-directive_002c-TIC54X"></a> |
| <a name="index-even-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.align [<var>size</var>]</code></dt> |
| <dt><code>.even</code></dt> |
| <dd><p>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. |
| </p><dl compact="compact"> |
| <dt><code>1</code></dt> |
| <dd><p>Align SPC to word boundary |
| </p></dd> |
| <dt><code>2</code></dt> |
| <dd><p>Align SPC to longword boundary (same as .even) |
| </p></dd> |
| <dt><code>128</code></dt> |
| <dd><p>Align SPC to page boundary |
| </p></dd> |
| </dl> |
| |
| <a name="index-asg-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.asg <var>string</var>, <var>name</var></code></dt> |
| <dd><p>Assign <var>name</var> the string <var>string</var>. String replacement is |
| performed on <var>string</var> before assignment. |
| </p> |
| <a name="index-eval-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.eval <var>string</var>, <var>name</var></code></dt> |
| <dd><p>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-bss-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.bss <var>symbol</var>, <var>size</var> [, [<var>blocking_flag</var>] [,<var>alignment_flag</var>]]</code></dt> |
| <dd><p>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-byte-directive_002c-TIC54X"></a> |
| <a name="index-ubyte-directive_002c-TIC54X"></a> |
| <a name="index-char-directive_002c-TIC54X"></a> |
| <a name="index-uchar-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.byte <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.ubyte <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.char <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.uchar <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dd><p>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-clink-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.clink ["<var>section_name</var>"]</code></dt> |
| <dd><p>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-c_005fmode-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.c_mode</code></dt> |
| <dd><p>TBD. |
| </p> |
| <a name="index-copy-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.copy "<var>filename</var>" | <var>filename</var></code></dt> |
| <dt><code>.include "<var>filename</var>" | <var>filename</var></code></dt> |
| <dd><p>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-data-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.data</code></dt> |
| <dd><p>Begin assembling code into the .data section. |
| </p> |
| <a name="index-double-directive_002c-TIC54X"></a> |
| <a name="index-ldouble-directive_002c-TIC54X"></a> |
| <a name="index-float-directive_002c-TIC54X"></a> |
| <a name="index-xfloat-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.double <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.ldouble <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.float <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.xfloat <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dd><p>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-drlist-directive_002c-TIC54X"></a> |
| <a name="index-drnolist-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.drlist</code></dt> |
| <dt><code>.drnolist</code></dt> |
| <dd><p>Control printing of directives to the listing file. Ignored. |
| </p> |
| <a name="index-emsg-directive_002c-TIC54X"></a> |
| <a name="index-mmsg-directive_002c-TIC54X"></a> |
| <a name="index-wmsg-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.emsg <var>string</var></code></dt> |
| <dt><code>.mmsg <var>string</var></code></dt> |
| <dt><code>.wmsg <var>string</var></code></dt> |
| <dd><p>Emit a user-defined error, message, or warning, respectively. |
| </p> |
| <a name="index-far_005fmode-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.far_mode</code></dt> |
| <dd><p>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-fclist-directive_002c-TIC54X"></a> |
| <a name="index-fcnolist-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.fclist</code></dt> |
| <dt><code>.fcnolist</code></dt> |
| <dd><p>Control printing of false conditional blocks to the listing file. |
| </p> |
| <a name="index-field-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.field <var>value</var> [,<var>size</var>]</code></dt> |
| <dd><p>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-global-directive_002c-TIC54X"></a> |
| <a name="index-def-directive_002c-TIC54X"></a> |
| <a name="index-ref-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.global <var>symbol</var> [,...,<var>symbol_n</var>]</code></dt> |
| <dt><code>.def <var>symbol</var> [,...,<var>symbol_n</var>]</code></dt> |
| <dt><code>.ref <var>symbol</var> [,...,<var>symbol_n</var>]</code></dt> |
| <dd><p><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-half-directive_002c-TIC54X"></a> |
| <a name="index-uhalf-directive_002c-TIC54X"></a> |
| <a name="index-short-directive_002c-TIC54X"></a> |
| <a name="index-ushort-directive_002c-TIC54X"></a> |
| <a name="index-int-directive_002c-TIC54X"></a> |
| <a name="index-uint-directive_002c-TIC54X"></a> |
| <a name="index-word-directive_002c-TIC54X"></a> |
| <a name="index-uword-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.half <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.uhalf <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.short <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.ushort <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.int <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.uint <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.word <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.uword <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dd><p>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-label-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.label <var>symbol</var></code></dt> |
| <dd><p>Define a special <var>symbol</var> to refer to the load time address of the |
| current section program counter. |
| </p> |
| <a name="index-length-directive_002c-TIC54X"></a> |
| <a name="index-width-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.length</code></dt> |
| <dt><code>.width</code></dt> |
| <dd><p>Set the page length and width of the output listing file. Ignored. |
| </p> |
| <a name="index-list-directive_002c-TIC54X"></a> |
| <a name="index-nolist-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.list</code></dt> |
| <dt><code>.nolist</code></dt> |
| <dd><p>Control whether the source listing is printed. Ignored. |
| </p> |
| <a name="index-long-directive_002c-TIC54X"></a> |
| <a name="index-ulong-directive_002c-TIC54X"></a> |
| <a name="index-xlong-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.long <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.ulong <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dt><code>.xlong <var>value</var> [,...,<var>value_n</var>]</code></dt> |
| <dd><p>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-loop-directive_002c-TIC54X"></a> |
| <a name="index-break-directive_002c-TIC54X"></a> |
| <a name="index-endloop-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.loop [<var>count</var>]</code></dt> |
| <dt><code>.break [<var>condition</var>]</code></dt> |
| <dt><code>.endloop</code></dt> |
| <dd><p>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-macro-directive_002c-TIC54X"></a> |
| <a name="index-endm-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code><var>macro_name</var> .macro [<var>param1</var>][,...<var>param_n</var>]</code></dt> |
| <dt><code>[.mexit]</code></dt> |
| <dt><code>.endm</code></dt> |
| <dd><p>See the section on macros for more explanation (See <a href="TIC54X_002dMacros.html#TIC54X_002dMacros">TIC54X-Macros</a>. |
| </p> |
| <a name="index-mlib-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.mlib "<var>filename</var>" | <var>filename</var></code></dt> |
| <dd><p>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-mlist-directive_002c-TIC54X"></a> |
| <a name="index-mnolist-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.mlist</code></dt> |
| <dt><code>.mnolist</code></dt> |
| <dd><p>Control whether to include macro and loop block expansions in the |
| listing output. Ignored. |
| </p> |
| <a name="index-mmregs-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.mmregs</code></dt> |
| <dd><p>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-newblock-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.newblock</code></dt> |
| <dd><p>This directive resets any TIC54X local labels currently defined. Normal |
| <code>as</code> local labels are unaffected. |
| </p> |
| <a name="index-option-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.option <var>option_list</var></code></dt> |
| <dd><p>Set listing options. Ignored. |
| </p> |
| <a name="index-sblock-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.sblock "<var>section_name</var>" | <var>section_name</var> [,"<var>name_n</var>" | <var>name_n</var>]</code></dt> |
| <dd><p>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-sect-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.sect "<var>section_name</var>"</code></dt> |
| <dd><p>Define a named initialized section and make it the current section. |
| </p> |
| <a name="index-set-directive_002c-TIC54X"></a> |
| <a name="index-equ-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code><var>symbol</var> .set "<var>value</var>"</code></dt> |
| <dt><code><var>symbol</var> .equ "<var>value</var>"</code></dt> |
| <dd><p>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-space-directive_002c-TIC54X"></a> |
| <a name="index-bes-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.space <var>size_in_bits</var></code></dt> |
| <dt><code>.bes <var>size_in_bits</var></code></dt> |
| <dd><p>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-sslist-directive_002c-TIC54X"></a> |
| <a name="index-ssnolist-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.sslist</code></dt> |
| <dt><code>.ssnolist</code></dt> |
| <dd><p>Controls the inclusion of subsym replacement in the listing output. Ignored. |
| </p> |
| <a name="index-string-directive_002c-TIC54X"></a> |
| <a name="index-pstring-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.string "<var>string</var>" [,...,"<var>string_n</var>"]</code></dt> |
| <dt><code>.pstring "<var>string</var>" [,...,"<var>string_n</var>"]</code></dt> |
| <dd><p>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-struct-directive_002c-TIC54X"></a> |
| <a name="index-tag-directive_002c-TIC54X"></a> |
| <a name="index-endstruct-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>[<var>stag</var>] .struct [<var>offset</var>]</code></dt> |
| <dt><code>[<var>name_1</var>] element [<var>count_1</var>]</code></dt> |
| <dt><code>[<var>name_2</var>] element [<var>count_2</var>]</code></dt> |
| <dt><code>[<var>tname</var>] .tag <var>stagx</var> [<var>tcount</var>]</code></dt> |
| <dt><code>...</code></dt> |
| <dt><code>[<var>name_n</var>] element [<var>count_n</var>]</code></dt> |
| <dt><code>[<var>ssize</var>] .endstruct</code></dt> |
| <dt><code><var>label</var> .tag [<var>stag</var>]</code></dt> |
| <dd><p>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> |
| <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-tab-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.tab</code></dt> |
| <dd><p>Set the tab size in the output listing. Ignored. |
| </p> |
| <a name="index-union-directive_002c-TIC54X"></a> |
| <a name="index-tag-directive_002c-TIC54X-1"></a> |
| <a name="index-endunion-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>[<var>utag</var>] .union</code></dt> |
| <dt><code>[<var>name_1</var>] element [<var>count_1</var>]</code></dt> |
| <dt><code>[<var>name_2</var>] element [<var>count_2</var>]</code></dt> |
| <dt><code>[<var>tname</var>] .tag <var>utagx</var>[,<var>tcount</var>]</code></dt> |
| <dt><code>...</code></dt> |
| <dt><code>[<var>name_n</var>] element [<var>count_n</var>]</code></dt> |
| <dt><code>[<var>usize</var>] .endstruct</code></dt> |
| <dt><code><var>label</var> .tag [<var>utag</var>]</code></dt> |
| <dd><p>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-usect-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>[<var>symbol</var>] .usect "<var>section_name</var>", <var>size</var>, [,[<var>blocking_flag</var>] [,<var>alignment_flag</var>]]</code></dt> |
| <dd><p>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-var-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.var <var>sym</var>[,..., <var>sym_n</var>]</code></dt> |
| <dd><p>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-version-directive_002c-TIC54X"></a> |
| </dd> |
| <dt><code>.version <var>version</var></code></dt> |
| <dd><p>Set which processor to build instructions for. Though the following |
| values are accepted, the op is ignored. |
| </p><dl compact="compact"> |
| <dt><code>541</code></dt> |
| <dt><code>542</code></dt> |
| <dt><code>543</code></dt> |
| <dt><code>545</code></dt> |
| <dt><code>545LP</code></dt> |
| <dt><code>546LP</code></dt> |
| <dt><code>548</code></dt> |
| <dt><code>549</code></dt> |
| </dl> |
| </dd> |
| </dl> |
| |
| <hr> |
| <div class="header"> |
| <p> |
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