Changes between Version 13 and Version 14 of GcnInstrsMimg

Timestamp:

01/17/16 19:00:26 (8 years ago)

Author:

trac

Comment:

--

GcnInstrsMimg

@@ -1100 +1100 @@
 </tbody>
 </table>
+<ul>
+<li>_L - choose LOD from VADDR from last register, after other components.</li>
+<li>_C - compare (by using z-compare function from sampler) fetched data from image
+(first component of pixel) with Z-COMP component from VADDR.</li>
+<li>_O - apply offset to image's address (add X, Y and Z offset to X, Y and Z coordinates).</li>
+</ul>
 <h3>Instruction set</h3>
 <p>Alphabetically sorted instruction list:</p>
@@ -1379 +1385 @@
 <p>Opcode: 64 (0x40)<br />
 Syntax: IMAGE_GATHER4 VDATA(4), VADDR(1:4), SRSRC(4,8), SSAMP(4)<br />
-Description: Get component's value from 4 neighboring pixels, that closest to choosen
-coordinates in VADDR. Choosen component is first one bit in DMASK. The left top pixel are
+Description: Get component's value from 4 neighboring pixels, starting from coordinates
+from VADDR. Choosen component is first one bit in DMASK. The left top pixel are
 choosen from FLOOR(X-0.5) for X coordinate, FLOOR(Y-0.5) for Y coordinate.
 Following VDATA registers stores:</p>
@@ -1460 +1466 @@
 for (BYTE i = 0; i &lt; BIT_CNT(DMASK); i++)
     VDATA[i] = SEXT(VDATA[i], COMPBITS)</code></p>
+<h4>IMAGE_SAMPLER</h4>
+<p>Opcode: 32 (0x20)<br />
+Syntax: IMAGE_SAMPLER VDATA(1:4), VADDR(1:4), SRSRC(4,8), SSAMP(4)<br />
+Description: Get sampled pixel value from SRSRC image at address VADDR by using
+SSAMP sampler.</p>
 <h4>IMAGE_STORE</h4>
 <p>Opcode: 8 (0x8)<br />