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<!--Weave of 'C Arithmetic' generated by Inweb-->
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<div class="breadcrumbs">
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../compiler.html">Inter Modules</a></li><li><a href="index.html">final</a></li><li><a href="index.html#5">Chapter 5: C</a></li><li><b>C Arithmetic</b></li></ul></div>
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<p class="purpose">Integer and floating-point calculations translated to C.</p>
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. </b>Integer arithmetic is handled by the standard operators in C, so this is very
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easy.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">CArithmetic::compile_primitive</span><button class="popup" onclick="togglePopup('usagePopup1')"><span class="comment-syntax">?</span><span class="popuptext" id="usagePopup1">Usage of <span class="code-font"><span class="function-syntax">CArithmetic::compile_primitive</span></span>:<br/>C Program Control - <a href="5-cpc.html#SP1">§1</a></span></button><span class="plain-syntax">(</span><span class="reserved-syntax">code_generation</span><span class="plain-syntax"> *</span><span class="identifier-syntax">gen</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_ti</span><span class="plain-syntax"> </span><span class="identifier-syntax">bip</span><span class="plain-syntax">, </span><span class="identifier-syntax">inter_tree_node</span><span class="plain-syntax"> *</span><span class="identifier-syntax">P</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">text_stream</span><span class="plain-syntax"> *</span><span class="identifier-syntax">OUT</span><span class="plain-syntax"> = </span><a href="2-cg.html#SP7" class="function-link"><span class="function-syntax">CodeGen::current</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">switch</span><span class="plain-syntax"> (</span><span class="identifier-syntax">bip</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">PLUS_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" + "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MINUS_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" - "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">UNARYMINUS_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(-("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"))"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">TIMES_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" * "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">DIVIDE_BIP:</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="5-cfm.html#SP1" class="function-link"><span class="function-syntax">CFunctionModel::inside_function</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"glulx_div_r("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" / "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">MODULO_BIP:</span><span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><a href="5-cfm.html#SP1" class="function-link"><span class="function-syntax">CFunctionModel::inside_function</span></a><span class="plain-syntax">(</span><span class="identifier-syntax">gen</span><span class="plain-syntax">)) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"glulx_mod_r("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">" %% "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">BITWISEAND_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")&("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"))"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">BITWISEOR_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")|("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"))"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">BITWISENOT_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"(~("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"))"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">SEQUENTIAL_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">","</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">TERNARYSEQUENTIAL_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"("</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A2</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">", "</span><span class="plain-syntax">);</span>
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<span class="plain-syntax"> </span><span class="constant-syntax">INV_A3</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">RANDOM_BIP:</span><span class="plain-syntax"> </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">"fn_i7_mgl_random(1, "</span><span class="plain-syntax">); </span><span class="constant-syntax">INV_A1</span><span class="plain-syntax">; </span><span class="identifier-syntax">WRITE</span><span class="plain-syntax">(</span><span class="string-syntax">")"</span><span class="plain-syntax">); </span><span class="reserved-syntax">break</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">default:</span><span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">NOT_APPLICABLE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">FALSE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. </b>Random integers:
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</p>
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<pre class="Extracts-displayed-code all-displayed-code code-font">
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<span class="Extracts-plain-syntax">/* </span><span class="Extracts-identifier-syntax">Return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">a</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">random</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">number</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">in</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">range</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">2</span><span class="Extracts-plain-syntax">^32-1. */</span>
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<span class="Extracts-identifier-syntax">uint32_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7_random</span><span class="Extracts-plain-syntax">() {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">random</span><span class="Extracts-plain-syntax">() << </span><span class="Extracts-constant-syntax">16</span><span class="Extracts-plain-syntax">) ^ </span><span class="Extracts-identifier-syntax">random</span><span class="Extracts-plain-syntax">();</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_random</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">uint32_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_random</span><span class="Extracts-plain-syntax">();</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> >= </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">i7_random</span><span class="Extracts-plain-syntax">() % (</span><span class="Extracts-identifier-syntax">uint32_t</span><span class="Extracts-plain-syntax">) (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax"> = -(</span><span class="Extracts-identifier-syntax">i7_random</span><span class="Extracts-plain-syntax">() % (</span><span class="Extracts-identifier-syntax">uint32_t</span><span class="Extracts-plain-syntax">) (-</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">));</span>
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|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">value</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fn_i7_mgl_random</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">r</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_random</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, &</span><span class="Extracts-identifier-syntax">r</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">r</span><span class="Extracts-plain-syntax">+1;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-plain-syntax">/* </span><span class="Extracts-identifier-syntax">Set</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">random</span><span class="Extracts-plain-syntax">-</span><span class="Extracts-identifier-syntax">number</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax">; </span><span class="Extracts-identifier-syntax">zero</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">means</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">use</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">as</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">random</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">a</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">source</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">as</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">possible</span><span class="Extracts-plain-syntax">. */</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_setrandom</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">s</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">uint32_t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> *((</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *) &</span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax">) = </span><span class="Extracts-identifier-syntax">s</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">time</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">NULL</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">srandom</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">seed</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
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<p class="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. </b>Floating-point calculations are not done by primitives but by the use of
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Glulx opcodes. (When Inform could only produce code for the Z-machine and Glulx
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virtual machines, Glulx was the obe of the two which could handle floating-point.)
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</p>
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<p class="commentary">We emulate these opcodes with a library of functions as follows.
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</p>
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<p class="commentary">Note that floating-point numbers are stored in <span class="extract"><span class="Extracts-extract-syntax">i7val</span></span> values at runtime by
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storing <span class="extract"><span class="Extracts-extract-syntax">float</span></span> (not, alas, <span class="extract"><span class="Extracts-extract-syntax">double</span></span>) values as if they were four-byte integers.
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</p>
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<pre class="Extracts-displayed-code all-displayed-code code-font">
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_add</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> + </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_sub</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> - </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_neg</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = -</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_mul</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> * </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
|
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_div</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) { </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Division</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">of</span><span class="Extracts-plain-syntax"> %</span><span class="Extracts-identifier-syntax">d</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">by</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">", </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">i7_fatal_exit</span><span class="Extracts-plain-syntax">(); </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax">; }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">Since</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">C</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">doesn</span><span class="Extracts-plain-syntax">'</span><span class="Extracts-identifier-syntax">t</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">guarantee</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">results</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">of</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">division</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">of</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">negative</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">numbers</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">we</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">carefully</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">convert</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">everything</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">positive</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">values</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">first</span><span class="Extracts-plain-syntax">. </span><span class="Extracts-identifier-syntax">They</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">have</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">to</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">be</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">unsigned</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">values</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">too</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">otherwise</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x80000000</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">case</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">goes</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">wonky</span><span class="Extracts-plain-syntax">. */</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> < </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> = (-</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> < </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = (-</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> / </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = -(</span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> / </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> }</span>
|
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> < </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = (-</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = -(</span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> / </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">);</span>
|
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> / </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax">}</span>
|
|
|
|
<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_div_r</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_div</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, &</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">);</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_mod</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) { </span><span class="Extracts-identifier-syntax">printf</span><span class="Extracts-plain-syntax">("</span><span class="Extracts-identifier-syntax">Division</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">of</span><span class="Extracts-plain-syntax"> %</span><span class="Extracts-identifier-syntax">d</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">by</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">\</span><span class="Extracts-identifier-syntax">n</span><span class="Extracts-plain-syntax">", </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">); </span><span class="Extracts-identifier-syntax">i7_fatal_exit</span><span class="Extracts-plain-syntax">(); </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax">; }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> < </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = -</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> < </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> = (-</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = -(</span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> % </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">ax</span><span class="Extracts-plain-syntax"> % </span><span class="Extracts-identifier-syntax">ay</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_mod_r</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_mod</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, &</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">typedef</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">gfloat32</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">gfloat32</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> *(</span><span class="Extracts-identifier-syntax">gfloat32</span><span class="Extracts-plain-syntax"> *)(&</span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">) = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">gfloat32</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">gfloat32</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> *(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *)(&</span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">) = </span><span class="Extracts-identifier-syntax">val</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">res</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_exp</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">expf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_fadd</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) + </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_fdiv</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) / </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_floor</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">floorf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_fmod</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">w</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fquot</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">fmodf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">quot</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fquot</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">rem</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">((</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">-</span><span class="Extracts-identifier-syntax">fquot</span><span class="Extracts-plain-syntax">) / </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">rem</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x0</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">rem</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x80000000</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">When</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">quotient</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">zero</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">sign</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">has</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">been</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">lost</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">in</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">shuffle</span><span class="Extracts-plain-syntax">. </span><span class="Extracts-identifier-syntax">We</span><span class="Extracts-plain-syntax">'</span><span class="Extracts-identifier-syntax">ll</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">set</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">that</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">by</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">hand</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">based</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">on</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">original</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">arguments</span><span class="Extracts-plain-syntax">. */</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">rem</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> ^ </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x80000000</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">quot</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">w</span><span class="Extracts-plain-syntax">) *</span><span class="Extracts-identifier-syntax">w</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">rem</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_fmul</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) * </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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|
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_fsub</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) - </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
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|
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|
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_ftonumn</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (!</span><span class="Extracts-identifier-syntax">signbit</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">)) {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">isnan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || </span><span class="Extracts-identifier-syntax">isinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> > </span><span class="Extracts-constant-syntax">2147483647</span><span class="Extracts-plain-syntax">.0))</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7FFFFFFF</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax">) (</span><span class="Extracts-identifier-syntax">roundf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">isnan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || </span><span class="Extracts-identifier-syntax">isinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> < -2147483647.0))</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x80000000</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax">) (</span><span class="Extracts-identifier-syntax">roundf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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|
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_ftonumz</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (!</span><span class="Extracts-identifier-syntax">signbit</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">)) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">isnan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || </span><span class="Extracts-identifier-syntax">isinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> > </span><span class="Extracts-constant-syntax">2147483647</span><span class="Extracts-plain-syntax">.0))</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7FFFFFFF</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax">) (</span><span class="Extracts-identifier-syntax">truncf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">isnan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || </span><span class="Extracts-identifier-syntax">isinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">) || (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> < -2147483647.0))</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x80000000</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax">) (</span><span class="Extracts-identifier-syntax">truncf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
|
|
<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_numtof</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">((</span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
|
|
<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jfeq</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax">) == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> && (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x007FFFFF</span><span class="Extracts-plain-syntax">) != </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">The</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">delta</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">NaN</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">which</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">can</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">never</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">match</span><span class="Extracts-plain-syntax">. */</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">xFF800000</span><span class="Extracts-plain-syntax">)</span>
|
|
<span class="Extracts-plain-syntax"> && (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">xFF800000</span><span class="Extracts-plain-syntax">)) {</span>
|
|
<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">Both</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">are</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinite</span><span class="Extracts-plain-syntax">. </span><span class="Extracts-identifier-syntax">Opposite</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinities</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">are</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">never</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">equal</span><span class="Extracts-plain-syntax">,</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">even</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">difference</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinite</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">so</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">this</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">easy</span><span class="Extracts-plain-syntax">. */</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) - </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">fabs</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">));</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> <= </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax"> && </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> >= -</span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax">);</span>
|
|
<span class="Extracts-plain-syntax"> }</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
|
|
<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jfne</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
|
|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax">) == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> && (</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x007FFFFF</span><span class="Extracts-plain-syntax">) != </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">The</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">delta</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">NaN</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">which</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">can</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">never</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">match</span><span class="Extracts-plain-syntax">. */</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">xFF800000</span><span class="Extracts-plain-syntax">)</span>
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<span class="Extracts-plain-syntax"> && (</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">xFF800000</span><span class="Extracts-plain-syntax">)) {</span>
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<span class="Extracts-plain-syntax"> /* </span><span class="Extracts-identifier-syntax">Both</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">are</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinite</span><span class="Extracts-plain-syntax">. </span><span class="Extracts-identifier-syntax">Opposite</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinities</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">are</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">never</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">equal</span><span class="Extracts-plain-syntax">,</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">even</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">the</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">difference</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">infinite</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">so</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">this</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">is</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">easy</span><span class="Extracts-plain-syntax">. */</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> } </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) - </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">float</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">fabs</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">));</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax"> = (</span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> <= </span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax"> && </span><span class="Extracts-identifier-syntax">fx</span><span class="Extracts-plain-syntax"> >= -</span><span class="Extracts-identifier-syntax">fy</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> }</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (!</span><span class="Extracts-identifier-syntax">result</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jfge</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) >= </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">)) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jflt</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) < </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">)) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jisinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> || </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">xFF800000</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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|
<span class="Extracts-plain-syntax">}</span>
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|
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<span class="Extracts-identifier-syntax">int</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_jisnan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax">) == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x7F800000</span><span class="Extracts-plain-syntax"> && (</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax"> & </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-identifier-syntax">x007FFFFF</span><span class="Extracts-plain-syntax">) != </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">) </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">return</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">;</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_log</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">logf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_acos</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">acosf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_asin</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">asinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_atan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">atanf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_ceil</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">ceilf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_cos</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">cosf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
|
|
<span class="Extracts-plain-syntax">}</span>
|
|
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_pow</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax">) {</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> (</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) == </span><span class="Extracts-constant-syntax">1</span><span class="Extracts-plain-syntax">.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">)</span>
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|
<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(1.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">);</span>
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|
<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) == </span><span class="Extracts-constant-syntax">0</span><span class="Extracts-plain-syntax">.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">) || (</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) == -0.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">))</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(1.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">if</span><span class="Extracts-plain-syntax"> ((</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">) == -1.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">) && </span><span class="Extracts-identifier-syntax">isinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">)))</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(1.0</span><span class="Extracts-identifier-syntax">f</span><span class="Extracts-plain-syntax">);</span>
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<span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">else</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">z</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">powf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">), </span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_sin</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">sinf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_sqrt</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">sqrtf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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<span class="Extracts-identifier-syntax">void</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">glulx_tan</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> </span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">, </span><span class="Extracts-identifier-syntax">i7val</span><span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax">) {</span>
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<span class="Extracts-plain-syntax"> *</span><span class="Extracts-identifier-syntax">y</span><span class="Extracts-plain-syntax"> = </span><span class="Extracts-identifier-syntax">encode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">tanf</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">decode_float</span><span class="Extracts-plain-syntax">(</span><span class="Extracts-identifier-syntax">x</span><span class="Extracts-plain-syntax">)));</span>
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<span class="Extracts-plain-syntax">}</span>
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</pre>
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<ul class="endnotetexts"><li>This is part of the extract file inform7_clib.h.</li></ul>
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