Changes between Version 8 and Version 9 of GcnInstrsVopc

Timestamp:

11/25/17 22:00:28 (6 years ago)

Author:

trac

Comment:

--

GcnInstrsVopc

@@ -99 +99 @@
 </tbody>
 </table>
-<p>List of fields for VOP3A/VOP3B encoding (GCN 1.2):</p>
+<p>List of fields for VOP3A/VOP3B encoding (GCN 1.2/1.4):</p>
 <table>
 <thead>
@@ -118 +118 @@
 <td>ABS</td>
 <td>Absolute modifiers for source operands (VOP3A)</td>
+</tr>
+<tr>
+<td>11-14</td>
+<td>OPSEL</td>
+<td>Operand selection (VOP3A) (GCN 1.4)</td>
 </tr>
 <tr>
@@ -169 +174 @@
 <p>NOTE: ABS and negation is applied to source operand for any instruction.</p>
 <p>Negation and absolute value can be combined: <code>-ABS(V0)</code>.</p>
+<p>Operand half selection (OPSEL) take value with bits number depends of number operands.
+Last bit control destination operand. Zero in bit choose lower 16-bits in dword,
+one choose higher 16-bits. Example: op_sel:[0,1,1] - higher 16-bits in second source and
+in destination.</p>
 <p>Limitations for operands:</p>
 <ul>