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| <h5 class="subsubsection">23.3.3.6 Arithmetic In Guile</h5> |
| |
| <p>The <code>(gdb)</code> module provides several functions for performing |
| arithmetic on <code><gdb:value></code> objects. |
| The arithmetic is performed as if it were done by the target, |
| and therefore has target semantics which are not necessarily |
| those of Scheme. For example operations work with a fixed precision, |
| not the arbitrary precision of Scheme. |
| |
| <p>Wherever a function takes an integer or pointer as an operand, |
| <span class="sc">gdb</span> will convert appropriate Scheme values to perform |
| the operation. |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-add</b><var> a b<a name="index-value_002dadd-2512"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-sub</b><var> a b<a name="index-value_002dsub-2513"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-mul</b><var> a b<a name="index-value_002dmul-2514"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-div</b><var> a b<a name="index-value_002ddiv-2515"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-rem</b><var> a b<a name="index-value_002drem-2516"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-mod</b><var> a b<a name="index-value_002dmod-2517"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-pow</b><var> a b<a name="index-value_002dpow-2518"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-not</b><var> a<a name="index-value_002dnot-2519"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-neg</b><var> a<a name="index-value_002dneg-2520"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-pos</b><var> a<a name="index-value_002dpos-2521"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-abs</b><var> a<a name="index-value_002dabs-2522"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-lsh</b><var> a b<a name="index-value_002dlsh-2523"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-rsh</b><var> a b<a name="index-value_002drsh-2524"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-min</b><var> a b<a name="index-value_002dmin-2525"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-max</b><var> a b<a name="index-value_002dmax-2526"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-lognot</b><var> a<a name="index-value_002dlognot-2527"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-logand</b><var> a b<a name="index-value_002dlogand-2528"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-logior</b><var> a b<a name="index-value_002dlogior-2529"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value-logxor</b><var> a b<a name="index-value_002dlogxor-2530"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value=?</b><var> a b<a name="index-value_003d_003f-2531"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value<?</b><var> a b<a name="index-value_003c_003f-2532"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value<=?</b><var> a b<a name="index-value_003c_003d_003f-2533"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value>?</b><var> a b<a name="index-value_003e_003f-2534"></a></var><br> |
| </div> |
| |
| <div class="defun"> |
| — Scheme Procedure: <b>value>=?</b><var> a b<a name="index-value_003e_003d_003f-2535"></a></var><br> |
| </div> |
| |
| <p>Scheme does not provide a <code>not-equal</code> function, |
| and thus Guile support in <span class="sc">gdb</span> does not either. |
| |
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