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| <title>Using as: D30V-Regs</title> |
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| <a name="Register-Names-6"></a> |
| <h4 class="subsubsection">9.10.2.5 Register Names</h4> |
| <a name="index-D30V-registers"></a> |
| <a name="index-registers_002c-D30V"></a> |
| <p>You can use the predefined symbols ‘<samp>r0</samp>’ through ‘<samp>r63</samp>’ to refer |
| to the D30V registers. You can also use ‘<samp>sp</samp>’ as an alias for |
| ‘<samp>r63</samp>’ and ‘<samp>link</samp>’ as an alias for ‘<samp>r62</samp>’. The accumulators |
| are ‘<samp>a0</samp>’ and ‘<samp>a1</samp>’. |
| </p> |
| <p>The D30V also has predefined symbols for these control registers and status bits: |
| </p><dl compact="compact"> |
| <dt><code>psw</code></dt> |
| <dd><p>Processor Status Word |
| </p></dd> |
| <dt><code>bpsw</code></dt> |
| <dd><p>Backup Processor Status Word |
| </p></dd> |
| <dt><code>pc</code></dt> |
| <dd><p>Program Counter |
| </p></dd> |
| <dt><code>bpc</code></dt> |
| <dd><p>Backup Program Counter |
| </p></dd> |
| <dt><code>rpt_c</code></dt> |
| <dd><p>Repeat Count |
| </p></dd> |
| <dt><code>rpt_s</code></dt> |
| <dd><p>Repeat Start address |
| </p></dd> |
| <dt><code>rpt_e</code></dt> |
| <dd><p>Repeat End address |
| </p></dd> |
| <dt><code>mod_s</code></dt> |
| <dd><p>Modulo Start address |
| </p></dd> |
| <dt><code>mod_e</code></dt> |
| <dd><p>Modulo End address |
| </p></dd> |
| <dt><code>iba</code></dt> |
| <dd><p>Instruction Break Address |
| </p></dd> |
| <dt><code>f0</code></dt> |
| <dd><p>Flag 0 |
| </p></dd> |
| <dt><code>f1</code></dt> |
| <dd><p>Flag 1 |
| </p></dd> |
| <dt><code>f2</code></dt> |
| <dd><p>Flag 2 |
| </p></dd> |
| <dt><code>f3</code></dt> |
| <dd><p>Flag 3 |
| </p></dd> |
| <dt><code>f4</code></dt> |
| <dd><p>Flag 4 |
| </p></dd> |
| <dt><code>f5</code></dt> |
| <dd><p>Flag 5 |
| </p></dd> |
| <dt><code>f6</code></dt> |
| <dd><p>Flag 6 |
| </p></dd> |
| <dt><code>f7</code></dt> |
| <dd><p>Flag 7 |
| </p></dd> |
| <dt><code>s</code></dt> |
| <dd><p>Same as flag 4 (saturation flag) |
| </p></dd> |
| <dt><code>v</code></dt> |
| <dd><p>Same as flag 5 (overflow flag) |
| </p></dd> |
| <dt><code>va</code></dt> |
| <dd><p>Same as flag 6 (sticky overflow flag) |
| </p></dd> |
| <dt><code>c</code></dt> |
| <dd><p>Same as flag 7 (carry/borrow flag) |
| </p></dd> |
| <dt><code>b</code></dt> |
| <dd><p>Same as flag 7 (carry/borrow flag) |
| </p></dd> |
| </dl> |
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