| <html lang="en"> |
| <head> |
| <title>SH64-Addressing - Using as</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Using as"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="SH64-Syntax.html#SH64-Syntax" title="SH64 Syntax"> |
| <link rel="prev" href="SH64_002dRegs.html#SH64_002dRegs" title="SH64-Regs"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU Assembler "as". |
| |
| Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 2000, 2001, 2002, 2006, 2007, 2008, 2009, 2010 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 1.3 |
| 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''. |
| |
| --> |
| <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; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| <link rel="stylesheet" type="text/css" href="../cs.css"> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="SH64-Addressing"></a> |
| <a name="SH64_002dAddressing"></a> |
| <p> |
| Previous: <a rel="previous" accesskey="p" href="SH64_002dRegs.html#SH64_002dRegs">SH64-Regs</a>, |
| Up: <a rel="up" accesskey="u" href="SH64-Syntax.html#SH64-Syntax">SH64 Syntax</a> |
| <hr> |
| </div> |
| |
| <h5 class="subsubsection">9.34.2.3 Addressing Modes</h5> |
| |
| <p><a name="index-addressing-modes_002c-SH64-1612"></a><a name="index-SH64-addressing-modes-1613"></a> |
| SH64 operands consist of either a register or immediate value. The |
| immediate value can be a constant or label reference (or portion of a |
| label reference), as in this example: |
| |
| <pre class="example"> movi 4,r2 |
| pt function, tr4 |
| movi (function >> 16) & 65535,r0 |
| shori function & 65535, r0 |
| ld.l r0,4,r0 |
| </pre> |
| <p><a name="index-datalabel_002c-SH64-1614"></a>Instruction label references can reference labels in either SHmedia or |
| SHcompact. To differentiate between the two, labels in SHmedia sections |
| will always have the least significant bit set (i.e. they will be odd), |
| which SHcompact labels will have the least significant bit reset |
| (i.e. they will be even). If you need to reference the actual address |
| of a label, you can use the <code>datalabel</code> modifier, as in this |
| example: |
| |
| <pre class="example"> .long function |
| .long datalabel function |
| </pre> |
| <p>In that example, the first longword may or may not have the least |
| significant bit set depending on whether the label is an SHmedia label |
| or an SHcompact label. The second longword will be the actual address |
| of the label, regardless of what type of label it is. |
| |
| </body></html> |
| |
