<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i965: Support GL_ARB_blend_func_extended in SIMD16"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82831">82831</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Blocks</th>
<td>77547
</td>
</tr>
<tr>
<th>Summary</th>
<td>i965: Support GL_ARB_blend_func_extended in SIMD16
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mattst88@gmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>To implement dual source blending in SIMD16 we need to send two messages:
SIMD8_DUALSRC_LO and SIMD8_DUALSRC_HI (as they're named in the BSpec/PRM).
These are called
<span class="quote">> BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN01
> BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_DUAL_SOURCE_SUBSPAN23</span >
in the i965 driver.
Note that the PRM says
<span class="quote">> If multiple SIMD8 Dual Source messages are delivered by the pixel shader
> thread, each SIMD8_DUALSRC_LO message must be issued before the
> SIMD8_DUALSRC_HI message with the same Slot Group Select setting.</span >
See fs_visitor::emit_fb_writes().</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>