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| <h4 class="subsection">9.54.3 XStormy16 Pseudo-Opcodes</h4> |
| |
| <p><a name="index-XStormy16-pseudo_002dopcodes-2598"></a><a name="index-pseudo_002dopcodes-for-XStormy16-2599"></a><code>as</code> implements all the standard XStormy16 opcodes. |
| |
| <p><code>as</code> also implements the following pseudo ops: |
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| <a name="index-g_t_0040code_007b_0040_0040lo_007d-pseudo_002dop_002c-XStormy16-2600"></a> |
| <dl><dt><code>@lo()</code><dd>Computes the lower 16 bits of the given expression and stores it into |
| the immediate operand field of the given instruction. For example: |
| |
| <p>‘<samp><span class="samp">add r6, @lo(here - there)</span></samp>’ |
| |
| <p>computes the difference between the address of labels 'here' and |
| 'there', takes the lower 16 bits of this difference and adds it to |
| register 6. |
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| <p><a name="index-g_t_0040code_007b_0040_0040hi_007d-pseudo_002dop_002c-XStormy16-2601"></a><br><dt><code>@hi()</code><dd>Computes the higher 16 bits of the given expression and stores it into |
| the immediate operand field of the given instruction. For example: |
| |
| <p>‘<samp><span class="samp">addc r7, @hi(here - there)</span></samp>’ |
| |
| <p>computes the difference between the address of labels 'here' and |
| 'there', takes the upper 16 bits of this difference, shifts it down 16 |
| bits and then adds it, along with the carry bit, to the value in |
| register 7. |
| |
| </dl> |
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