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| <a name="Register-Names-5"></a> |
| <h4 class="subsubsection">9.9.2.4 Register Names</h4> |
| <a name="index-D10V-registers"></a> |
| <a name="index-registers_002c-D10V"></a> |
| <p>You can use the predefined symbols ‘<samp>r0</samp>’ through ‘<samp>r15</samp>’ to refer to the D10V |
| registers. You can also use ‘<samp>sp</samp>’ as an alias for ‘<samp>r15</samp>’. The accumulators |
| are ‘<samp>a0</samp>’ and ‘<samp>a1</samp>’. There are special register-pair names that may |
| optionally be used in opcodes that require even-numbered registers. Register names are |
| not case sensitive. |
| </p> |
| <p>Register Pairs |
| </p><dl compact="compact"> |
| <dt><code>r0-r1</code></dt> |
| <dt><code>r2-r3</code></dt> |
| <dt><code>r4-r5</code></dt> |
| <dt><code>r6-r7</code></dt> |
| <dt><code>r8-r9</code></dt> |
| <dt><code>r10-r11</code></dt> |
| <dt><code>r12-r13</code></dt> |
| <dt><code>r14-r15</code></dt> |
| </dl> |
| |
| <p>The D10V 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>c</code></dt> |
| <dd><p>Carry flag |
| </p></dd> |
| </dl> |
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