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| <h4 class="subsection">6.57.18 MSP430 Built-in Functions</h4> |
| |
| <p>GCC provides a couple of special builtin functions to aid in the |
| writing of interrupt handlers in C. |
| </p> |
| <dl compact="compact"> |
| <dt><code>__bic_SR_register_on_exit (int <var>mask</var>)</code></dt> |
| <dd><p>This clears the indicated bits in the saved copy of the status register |
| currently residing on the stack. This only works inside interrupt |
| handlers and the changes to the status register will only take affect |
| once the handler returns. |
| </p> |
| </dd> |
| <dt><code>__bis_SR_register_on_exit (int <var>mask</var>)</code></dt> |
| <dd><p>This sets the indicated bits in the saved copy of the status register |
| currently residing on the stack. This only works inside interrupt |
| handlers and the changes to the status register will only take affect |
| once the handler returns. |
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