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<h5 class="subsubsection">9.24.2.3 Register Names</h5>
<p><a name="index-MSP-430-register-names-1328"></a><a name="index-register-names_002c-MSP-430-1329"></a>General-purpose registers are represented by predefined symbols of the
form <span class="samp">r</span><var>N</var> (for global registers), where <var>N</var> represents
a number between <code>0</code> and <code>15</code>. The leading
letters may be in either upper or lower case; for example, <span class="samp">r13</span>
and <span class="samp">R7</span> are both valid register names.
<p><a name="index-special-purpose-registers_002c-MSP-430-1330"></a>Register names <span class="samp">PC</span>, <span class="samp">SP</span> and <span class="samp">SR</span> cannot be used as register names
and will be treated as variables. Use <span class="samp">r0</span>, <span class="samp">r1</span>, and <span class="samp">r2</span> instead.
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