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| Previous: <a href="SH64_002dRegs.html#SH64_002dRegs" accesskey="p" rel="prev">SH64-Regs</a>, Up: <a href="SH64-Syntax.html#SH64-Syntax" accesskey="u" rel="up">SH64 Syntax</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> |
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| <a name="Addressing-Modes-4"></a> |
| <h4 class="subsubsection">9.40.2.3 Addressing Modes</h4> |
| |
| <a name="index-addressing-modes_002c-SH64"></a> |
| <a name="index-SH64-addressing-modes"></a> |
| |
| <p>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: |
| </p> |
| <div class="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></div> |
| |
| <a name="index-datalabel_002c-SH64"></a> |
| <p>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: |
| </p> |
| <div class="example"> |
| <pre class="example"> .long function |
| .long datalabel function |
| </pre></div> |
| |
| <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. |
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