You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
7.5 KiB
HTML
122 lines
7.5 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>M68HC11-Opts - Using as</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Using as">
|
|
<meta name="generator" content="makeinfo 4.7">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="M68HC11_002dDependent.html#M68HC11_002dDependent" title="M68HC11-Dependent">
|
|
<link rel="next" href="M68HC11_002dSyntax.html#M68HC11_002dSyntax" title="M68HC11-Syntax">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU Assembler "as".
|
|
|
|
Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
|
|
2006, 2007 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.1
|
|
or any later version published by the Free Software Foundation;
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
|
Back-Cover Texts. A copy of the license is included in the
|
|
section entitled ``GNU Free Documentation License''.
|
|
|
|
man end-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family: serif; font-weight: normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<p>
|
|
<a name="M68HC11_002dOpts"></a>Next: <a rel="next" accesskey="n" href="M68HC11_002dSyntax.html#M68HC11_002dSyntax">M68HC11-Syntax</a>,
|
|
Up: <a rel="up" accesskey="u" href="M68HC11_002dDependent.html#M68HC11_002dDependent">M68HC11-Dependent</a>
|
|
<hr><br>
|
|
</div>
|
|
|
|
<h4 class="subsection">9.21.1 M68HC11 and M68HC12 Options</h4>
|
|
|
|
<p><a name="index-options_002c-M68HC11-1144"></a><a name="index-M68HC11-options-1145"></a>The Motorola 68HC11 and 68HC12 version of <code>as</code> have a few machine
|
|
dependent options.
|
|
|
|
|
|
<a name="index-_0040samp_007b_002dm68hc11_007d-1146"></a>
|
|
<dl><dt><code>-m68hc11</code><dd>This option switches the assembler in the M68HC11 mode. In this mode,
|
|
the assembler only accepts 68HC11 operands and mnemonics. It produces
|
|
code for the 68HC11.
|
|
|
|
<p><a name="index-_0040samp_007b_002dm68hc12_007d-1147"></a><br><dt><code>-m68hc12</code><dd>This option switches the assembler in the M68HC12 mode. In this mode,
|
|
the assembler also accepts 68HC12 operands and mnemonics. It produces
|
|
code for the 68HC12. A few 68HC11 instructions are replaced by
|
|
some 68HC12 instructions as recommended by Motorola specifications.
|
|
|
|
<p><a name="index-_0040samp_007b_002dm68hcs12_007d-1148"></a><br><dt><code>-m68hcs12</code><dd>This option switches the assembler in the M68HCS12 mode. This mode is
|
|
similar to <span class="samp">-m68hc12</span> but specifies to assemble for the 68HCS12
|
|
series. The only difference is on the assembling of the <span class="samp">movb</span>
|
|
and <span class="samp">movw</span> instruction when a PC-relative operand is used.
|
|
|
|
<p><a name="index-_0040samp_007b_002dmshort_007d-1149"></a><br><dt><code>-mshort</code><dd>This option controls the ABI and indicates to use a 16-bit integer ABI.
|
|
It has no effect on the assembled instructions.
|
|
This is the default.
|
|
|
|
<p><a name="index-_0040samp_007b_002dmlong_007d-1150"></a><br><dt><code>-mlong</code><dd>This option controls the ABI and indicates to use a 32-bit integer ABI.
|
|
|
|
<p><a name="index-_0040samp_007b_002dmshort_002ddouble_007d-1151"></a><br><dt><code>-mshort-double</code><dd>This option controls the ABI and indicates to use a 32-bit float ABI.
|
|
This is the default.
|
|
|
|
<p><a name="index-_0040samp_007b_002dmlong_002ddouble_007d-1152"></a><br><dt><code>-mlong-double</code><dd>This option controls the ABI and indicates to use a 64-bit float ABI.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dstrict_002ddirect_002dmode_007d-1153"></a><br><dt><code>--strict-direct-mode</code><dd>You can use the <span class="samp">--strict-direct-mode</span> option to disable
|
|
the automatic translation of direct page mode addressing into
|
|
extended mode when the instruction does not support direct mode.
|
|
For example, the <span class="samp">clr</span> instruction does not support direct page
|
|
mode addressing. When it is used with the direct page mode,
|
|
<code>as</code> will ignore it and generate an absolute addressing.
|
|
This option prevents <code>as</code> from doing this, and the wrong
|
|
usage of the direct page mode will raise an error.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dshort_002dbranches_007d-1154"></a><br><dt><code>--short-branches</code><dd>The <span class="samp">--short-branches</span> option turns off the translation of
|
|
relative branches into absolute branches when the branch offset is
|
|
out of range. By default <code>as</code> transforms the relative
|
|
branch (<span class="samp">bsr</span>, <span class="samp">bgt</span>, <span class="samp">bge</span>, <span class="samp">beq</span>, <span class="samp">bne</span>,
|
|
<span class="samp">ble</span>, <span class="samp">blt</span>, <span class="samp">bhi</span>, <span class="samp">bcc</span>, <span class="samp">bls</span>,
|
|
<span class="samp">bcs</span>, <span class="samp">bmi</span>, <span class="samp">bvs</span>, <span class="samp">bvs</span>, <span class="samp">bra</span>) into
|
|
an absolute branch when the offset is out of the -128 .. 127 range.
|
|
In that case, the <span class="samp">bsr</span> instruction is translated into a
|
|
<span class="samp">jsr</span>, the <span class="samp">bra</span> instruction is translated into a
|
|
<span class="samp">jmp</span> and the conditional branches instructions are inverted and
|
|
followed by a <span class="samp">jmp</span>. This option disables these translations
|
|
and <code>as</code> will generate an error if a relative branch
|
|
is out of range. This option does not affect the optimization
|
|
associated to the <span class="samp">jbra</span>, <span class="samp">jbsr</span> and <span class="samp">jbXX</span> pseudo opcodes.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dforce_002dlong_002dbranches_007d-1155"></a><br><dt><code>--force-long-branches</code><dd>The <span class="samp">--force-long-branches</span> option forces the translation of
|
|
relative branches into absolute branches. This option does not affect
|
|
the optimization associated to the <span class="samp">jbra</span>, <span class="samp">jbsr</span> and
|
|
<span class="samp">jbXX</span> pseudo opcodes.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dprint_002dinsn_002dsyntax_007d-1156"></a><br><dt><code>--print-insn-syntax</code><dd>You can use the <span class="samp">--print-insn-syntax</span> option to obtain the
|
|
syntax description of the instruction when an error is detected.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dprint_002dopcodes_007d-1157"></a><br><dt><code>--print-opcodes</code><dd>The <span class="samp">--print-opcodes</span> option prints the list of all the
|
|
instructions with their syntax. The first item of each line
|
|
represents the instruction name and the rest of the line indicates
|
|
the possible operands for that instruction. The list is printed
|
|
in alphabetical order. Once the list is printed <code>as</code>
|
|
exits.
|
|
|
|
<p><a name="index-_0040samp_007b_002d_002dgenerate_002dexample_007d-1158"></a><br><dt><code>--generate-example</code><dd>The <span class="samp">--generate-example</span> option is similar to <span class="samp">--print-opcodes</span>
|
|
but it generates an example for each instruction instead.
|
|
</dl>
|
|
|
|
</body></html>
|
|
|