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| <h5 class="subsubsection">9.12.2.5 Register Names</h5> |
| |
| <p><a name="index-D30V-registers-1021"></a><a name="index-registers_002c-D30V-1022"></a>You can use the predefined symbols ‘<samp><span class="samp">r0</span></samp>’ through ‘<samp><span class="samp">r63</span></samp>’ to refer |
| to the D30V registers. You can also use ‘<samp><span class="samp">sp</span></samp>’ as an alias for |
| ‘<samp><span class="samp">r63</span></samp>’ and ‘<samp><span class="samp">link</span></samp>’ as an alias for ‘<samp><span class="samp">r62</span></samp>’. The accumulators |
| are ‘<samp><span class="samp">a0</span></samp>’ and ‘<samp><span class="samp">a1</span></samp>’. |
| |
| <p>The D30V also has predefined symbols for these control registers and status bits: |
| <dl> |
| <dt><code>psw</code><dd>Processor Status Word |
| <br><dt><code>bpsw</code><dd>Backup Processor Status Word |
| <br><dt><code>pc</code><dd>Program Counter |
| <br><dt><code>bpc</code><dd>Backup Program Counter |
| <br><dt><code>rpt_c</code><dd>Repeat Count |
| <br><dt><code>rpt_s</code><dd>Repeat Start address |
| <br><dt><code>rpt_e</code><dd>Repeat End address |
| <br><dt><code>mod_s</code><dd>Modulo Start address |
| <br><dt><code>mod_e</code><dd>Modulo End address |
| <br><dt><code>iba</code><dd>Instruction Break Address |
| <br><dt><code>f0</code><dd>Flag 0 |
| <br><dt><code>f1</code><dd>Flag 1 |
| <br><dt><code>f2</code><dd>Flag 2 |
| <br><dt><code>f3</code><dd>Flag 3 |
| <br><dt><code>f4</code><dd>Flag 4 |
| <br><dt><code>f5</code><dd>Flag 5 |
| <br><dt><code>f6</code><dd>Flag 6 |
| <br><dt><code>f7</code><dd>Flag 7 |
| <br><dt><code>s</code><dd>Same as flag 4 (saturation flag) |
| <br><dt><code>v</code><dd>Same as flag 5 (overflow flag) |
| <br><dt><code>va</code><dd>Same as flag 6 (sticky overflow flag) |
| <br><dt><code>c</code><dd>Same as flag 7 (carry/borrow flag) |
| <br><dt><code>b</code><dd>Same as flag 7 (carry/borrow flag) |
| </dl> |
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