Exceptions</h2>
<p>Same exceptions as in protected mode.</p>
<h2>64-Bit Mode Exceptions</h2>
<table class="exception-table">
<tr>
<td>#SS(0)</td>
<td>If a memory address referencing the SS segment is in a non-canonical form.</td></tr>
<tr>
<td>#GP(0)</td>
<td>
<p>If the memory address is in a non-canonical form.</p>
<p>If memory operand for CMPXCHG16B is not aligned on a 16-byte boundary.</p>
<p>If CPUID.01H:ECX.CMPXCHG16B[bit 13] = 0.</p></td></tr>
<tr>
<td>#UD</td>
<td>If the destination operand is not a 