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 127   <div class="headertitle"><div class="title">MISRA-C Deviations </div></div>
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 129 <div class="contents">
 130 <div class="textblock"><p><a class="anchor" id="md_src_misra"></a> CMSIS-Core (Cortex-M) uses the common coding rules for CMSIS components that are documented in <a href="../General/index.html">CMSIS Introduction</a>.</p>
 131 <p>CMSIS-Core (Cortex-M) violates the following MISRA-C:2012 rules:</p>
 132 <ul>
 133 <li>Directive 4.9, function-like macro defined.<ul>
 134 <li>Violated since function-like macros are used to generate more efficient code.</li>
 135 </ul>
 136 </li>
 137 <li>Rule 1.3, multiple use of '#/##' operators in macro definition.<ul>
 138 <li>Violated since function-like macros are used to generate more efficient code.</li>
 139 </ul>
 140 </li>
 141 <li>Rule 11.4, conversion between a pointer and integer type.<ul>
 142 <li>Violated because of core register access.</li>
 143 </ul>
 144 </li>
 145 <li>Rule 11.6, cast from unsigned long to pointer.<ul>
 146 <li>Violated because of core register access.</li>
 147 </ul>
 148 </li>
 149 <li>Rule 13.5, side effects on right hand side of logical operator.<ul>
 150 <li>Violated because of shift operand is used in macros and functions.</li>
 151 </ul>
 152 </li>
 153 <li>Rule 14.4, conditional expression should have essentially Boolean type.<ul>
 154 <li>Violated since macros with several instructions are used.</li>
 155 </ul>
 156 </li>
 157 <li>Rule 15.5, return statement before end of function.<ul>
 158 <li>Violated to simplify code logic.</li>
 159 </ul>
 160 </li>
 161 <li>Rule 20.10, '#/##' operators used.<ul>
 162 <li>Violated since function-like macros are used to generate more efficient code.</li>
 163 </ul>
 164 </li>
 165 <li>Rule 21.1, reserved to the compiler.<ul>
 166 <li>Violated since macros with leading underscores are used. </li>
 167 </ul>
 168 </li>
 169 </ul>
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