aarch64-linux-gnu-5.1/share/doc/as.html/IA_002d64-Options.html - toolchains/linux-x86/gcc - Git at Google

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 <a name="IA_002d64-Options"></a>
 <div class="header">
 <p>
 Next: <a href="IA_002d64-Syntax.html#IA_002d64-Syntax" accesskey="n" rel="next">IA-64 Syntax</a>, Up: <a href="IA_002d64_002dDependent.html#IA_002d64_002dDependent" accesskey="u" rel="up">IA-64-Dependent</a> &nbsp; [<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="Options-11"></a>
 <h4 class="subsection">9.18.1 Options</h4>
 <a name="index-IA_002d64-options"></a>
 <a name="index-options-for-IA_002d64"></a>

 <dl compact="compact">
 <dd><a name="index-_002dmconstant_002dgp-command-line-option_002c-IA_002d64"></a>

 </dd>
 <dt><samp>-mconstant-gp</samp></dt>
 <dd><p>This option instructs the assembler to mark the resulting object file
 as using the &ldquo;constant GP&rdquo; model.  With this model, it is assumed
 that the entire program uses a single global pointer (GP) value.  Note
 that this option does not in any fashion affect the machine code
 emitted by the assembler.  All it does is turn on the EF_IA_64_CONS_GP
 flag in the ELF file header.
 </p>
 </dd>
 <dt><samp>-mauto-pic</samp></dt>
 <dd><p>This option instructs the assembler to mark the resulting object file
 as using the &ldquo;constant GP without function descriptor&rdquo; data model.
 This model is like the &ldquo;constant GP&rdquo; model, except that it
 additionally does away with function descriptors.  What this means is
 that the address of a function refers directly to the function&rsquo;s code
 entry-point.  Normally, such an address would refer to a function
 descriptor, which contains both the code entry-point and the GP-value
 needed by the function.  Note that this option does not in any fashion
 affect the machine code emitted by the assembler.  All it does is
 turn on the EF_IA_64_NOFUNCDESC_CONS_GP flag in the ELF file header.
 </p>
 </dd>
 <dt><samp>-milp32</samp></dt>
 <dt><samp>-milp64</samp></dt>
 <dt><samp>-mlp64</samp></dt>
 <dt><samp>-mp64</samp></dt>
 <dd><p>These options select the data model.  The assembler defaults to <code>-mlp64</code>
 (LP64 data model).
 </p>
 </dd>
 <dt><samp>-mle</samp></dt>
 <dt><samp>-mbe</samp></dt>
 <dd><p>These options select the byte order.  The <code>-mle</code> option selects little-endian
 byte order (default) and <code>-mbe</code> selects big-endian byte order.  Note that
 IA-64 machine code always uses little-endian byte order.
 </p>
 </dd>
 <dt><samp>-mtune=itanium1</samp></dt>
 <dt><samp>-mtune=itanium2</samp></dt>
 <dd><p>Tune for a particular IA-64 CPU, <var>itanium1</var> or <var>itanium2</var>. The
 default is <var>itanium2</var>.
 </p>
 </dd>
 <dt><samp>-munwind-check=warning</samp></dt>
 <dt><samp>-munwind-check=error</samp></dt>
 <dd><p>These options control what the assembler will do when performing
 consistency checks on unwind directives.  <code>-munwind-check=warning</code>
 will make the assembler issue a warning when an unwind directive check
 fails.  This is the default.  <code>-munwind-check=error</code> will make the
 assembler issue an error when an unwind directive check fails.
 </p>
 </dd>
 <dt><samp>-mhint.b=ok</samp></dt>
 <dt><samp>-mhint.b=warning</samp></dt>
 <dt><samp>-mhint.b=error</samp></dt>
 <dd><p>These options control what the assembler will do when the &lsquo;<samp>hint.b</samp>&rsquo;
 instruction is used.  <code>-mhint.b=ok</code> will make the assembler accept
 &lsquo;<samp>hint.b</samp>&rsquo;.  <code>-mint.b=warning</code> will make the assembler issue a
 warning when &lsquo;<samp>hint.b</samp>&rsquo; is used.  <code>-mhint.b=error</code> will make
 the assembler treat &lsquo;<samp>hint.b</samp>&rsquo; as an error, which is the default.
 </p>
 </dd>
 <dt><samp>-x</samp></dt>
 <dt><samp>-xexplicit</samp></dt>
 <dd><p>These options turn on dependency violation checking.
 </p>
 </dd>
 <dt><samp>-xauto</samp></dt>
 <dd><p>This option instructs the assembler to automatically insert stop bits where necessary
 to remove dependency violations.  This is the default mode.
 </p>
 </dd>
 <dt><samp>-xnone</samp></dt>
 <dd><p>This option turns off dependency violation checking.
 </p>
 </dd>
 <dt><samp>-xdebug</samp></dt>
 <dd><p>This turns on debug output intended to help tracking down bugs in the dependency
 violation checker.
 </p>
 </dd>
 <dt><samp>-xdebugn</samp></dt>
 <dd><p>This is a shortcut for -xnone -xdebug.
 </p>
 </dd>
 <dt><samp>-xdebugx</samp></dt>
 <dd><p>This is a shortcut for -xexplicit -xdebug.
 </p>
 </dd>
 </dl>

 <a name="index-IA_002d64-Syntax"></a>
 <hr>
 <div class="header">
 <p>
 Next: <a href="IA_002d64-Syntax.html#IA_002d64-Syntax" accesskey="n" rel="next">IA-64 Syntax</a>, Up: <a href="IA_002d64_002dDependent.html#IA_002d64_002dDependent" accesskey="u" rel="up">IA-64-Dependent</a> &nbsp; [<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>
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	<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
	<a name="IA_002d64-Options"></a>
	<div class="header">
	<p>
	Next: <a href="IA_002d64-Syntax.html#IA_002d64-Syntax" accesskey="n" rel="next">IA-64 Syntax</a>, Up: <a href="IA_002d64_002dDependent.html#IA_002d64_002dDependent" accesskey="u" rel="up">IA-64-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="Options-11"></a>
	<h4 class="subsection">9.18.1 Options</h4>
	<a name="index-IA_002d64-options"></a>
	<a name="index-options-for-IA_002d64"></a>

	<dl compact="compact">
	<dd><a name="index-_002dmconstant_002dgp-command-line-option_002c-IA_002d64"></a>

	</dd>
	<dt><samp>-mconstant-gp</samp></dt>
	<dd><p>This option instructs the assembler to mark the resulting object file
	as using the “constant GP” model. With this model, it is assumed
	that the entire program uses a single global pointer (GP) value. Note
	that this option does not in any fashion affect the machine code
	emitted by the assembler. All it does is turn on the EF_IA_64_CONS_GP
	flag in the ELF file header.
	</p>
	</dd>
	<dt><samp>-mauto-pic</samp></dt>
	<dd><p>This option instructs the assembler to mark the resulting object file
	as using the “constant GP without function descriptor” data model.
	This model is like the “constant GP” model, except that it
	additionally does away with function descriptors. What this means is
	that the address of a function refers directly to the function’s code
	entry-point. Normally, such an address would refer to a function
	descriptor, which contains both the code entry-point and the GP-value
	needed by the function. Note that this option does not in any fashion
	affect the machine code emitted by the assembler. All it does is
	turn on the EF_IA_64_NOFUNCDESC_CONS_GP flag in the ELF file header.
	</p>
	</dd>
	<dt><samp>-milp32</samp></dt>
	<dt><samp>-milp64</samp></dt>
	<dt><samp>-mlp64</samp></dt>
	<dt><samp>-mp64</samp></dt>
	<dd><p>These options select the data model. The assembler defaults to <code>-mlp64</code>
	(LP64 data model).
	</p>
	</dd>
	<dt><samp>-mle</samp></dt>
	<dt><samp>-mbe</samp></dt>
	<dd><p>These options select the byte order. The <code>-mle</code> option selects little-endian
	byte order (default) and <code>-mbe</code> selects big-endian byte order. Note that
	IA-64 machine code always uses little-endian byte order.
	</p>
	</dd>
	<dt><samp>-mtune=itanium1</samp></dt>
	<dt><samp>-mtune=itanium2</samp></dt>
	<dd><p>Tune for a particular IA-64 CPU, <var>itanium1</var> or <var>itanium2</var>. The
	default is <var>itanium2</var>.
	</p>
	</dd>
	<dt><samp>-munwind-check=warning</samp></dt>
	<dt><samp>-munwind-check=error</samp></dt>
	<dd><p>These options control what the assembler will do when performing
	consistency checks on unwind directives. <code>-munwind-check=warning</code>
	will make the assembler issue a warning when an unwind directive check
	fails. This is the default. <code>-munwind-check=error</code> will make the
	assembler issue an error when an unwind directive check fails.
	</p>
	</dd>
	<dt><samp>-mhint.b=ok</samp></dt>
	<dt><samp>-mhint.b=warning</samp></dt>
	<dt><samp>-mhint.b=error</samp></dt>
	<dd><p>These options control what the assembler will do when the ‘<samp>hint.b</samp>’
	instruction is used. <code>-mhint.b=ok</code> will make the assembler accept
	‘<samp>hint.b</samp>’. <code>-mint.b=warning</code> will make the assembler issue a
	warning when ‘<samp>hint.b</samp>’ is used. <code>-mhint.b=error</code> will make
	the assembler treat ‘<samp>hint.b</samp>’ as an error, which is the default.
	</p>
	</dd>
	<dt><samp>-x</samp></dt>
	<dt><samp>-xexplicit</samp></dt>
	<dd><p>These options turn on dependency violation checking.
	</p>
	</dd>
	<dt><samp>-xauto</samp></dt>
	<dd><p>This option instructs the assembler to automatically insert stop bits where necessary
	to remove dependency violations. This is the default mode.
	</p>
	</dd>
	<dt><samp>-xnone</samp></dt>
	<dd><p>This option turns off dependency violation checking.
	</p>
	</dd>
	<dt><samp>-xdebug</samp></dt>
	<dd><p>This turns on debug output intended to help tracking down bugs in the dependency
	violation checker.
	</p>
	</dd>
	<dt><samp>-xdebugn</samp></dt>
	<dd><p>This is a shortcut for -xnone -xdebug.
	</p>
	</dd>
	<dt><samp>-xdebugx</samp></dt>
	<dd><p>This is a shortcut for -xexplicit -xdebug.
	</p>
	</dd>
	</dl>

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