33 lines
1.8 KiB
HTML
33 lines
1.8 KiB
HTML
<!doctype html>
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<html lang="en-US">
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<head>
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<meta charset="utf-8">
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<title>asmscript (asms) documentation</title>
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<link rel="stylesheet" href="style.css">
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</head>
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<body>
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<main>
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<h1><a href="index.html">asmscript</a></h1>
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<nav>
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<ul>
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<li><a href="index.html">Overview</a></li>
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<li><a href="operands.html">Operands</a></li>
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<li><a href="procedures.html">Procedures</a></li>
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<li><a href="statements.html">Statements</a></li>
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<li><a href="conditions.html">Conditions</a></li>
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<li><a href="conditionals.html">Conditionals</a></li>
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</ul>
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</nav>
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<h2>Conditionals</h2>
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<p>Conditionals are extensions to statements that by their nature do not contain a condition. You can make a conditional by inserting the following syntax right before a semicolon:</p>
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<pre><span class="kw">if</span> CONDITION</pre>
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<p>Conditionals serve as a shorthand for branches with only one statement and no else block.</p>
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<p>Examples:</p>
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<pre><span class="reg">rax</span> = <span class="num">0</num> <span class="kw">if</span> <span class="reg">rcx</span> > <span class="num">5</span>;</span>
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<span class="reg">rax</span> += <span class="reg">rcx</span> <span class="kw">if</span> <span class="reg">rsi</span> <= <span class="num">-1</span>;
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<span class="kw">continue</span> <span class="kw">if</span> <span class="num">0</span> != <span class="reg">r15</span>;</pre>
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<p>Fun fact: the original intention behind conditionals is to have a syntax for conditional move intructions (cmov). Eventually I came to the conclusion that this syntax might as well be applicable to almost every statement, not just assignment. Conditional moves aren't implemented though, so when you use a conditional on an assignment, the compiler will just emit a conditional jump instruction.</p>
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</main>
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</body>
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</html>
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