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<title>BTR—Bit Test and Reset </title></head>
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<h1>BTR—Bit Test and Reset</h1>
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<th>Opcode</th>
<th>Instruction</th>
<th>Op/En</th>
<th>64-bit Mode</th>
<th>Compat/Leg Mode</th>
<th>Description</th></tr>
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<td>0F B3 /r</td>
<td>BTR <em>r/m16, r16</em></td>
<td>MR</td>
<td>Valid</td>
<td>Valid</td>
<td>Store selected bit in CF flag and clear.</td></tr>
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<td>0F B3 /r</td>