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<h3>mmcalls</h3>
<p> Instructs the compiler to optimize arithmetic and function calling code for use of MMX registers (AMD K6 + 3DNow! instruction set) or SSE registers (Intel SSE or SSE-2 instruction sets) when the related pragmas or options are enabled.</p>
<h5>Syntax</h5>
<p class="code">#pragma mmcalls on | off | reset</p>
<h5>Targets</h5>
Intel x86<br />
<h5>Remarks</h5>
<p>This pragma corresponds to the Use multimedia calling convention setting in the the x86 CodeGen panel. </p>
<p class="note"><strong>NOTE</strong> This pragma generates code that is not compatible with the Intel Pentium class of microprocessors.</p>
<p>To check this setting, use <span class="code">__option (mmcalls)</span>.<br />
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