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| </head> | |
| <body class="article"> | |
| <div id="header"> | |
| <h1>cl_intel_subgroups_short</h1> | |
| <div id="toc"> | |
| <div id="toctitle">Table of Contents</div> | |
| <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript> | |
| </div> | |
| </div> | |
| <div id="content"> | |
| <div class="sect1"> | |
| <h2 id="_name_strings">Name Strings</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p><span class="monospaced">cl_intel_subgroups_short</span></p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_contact">Contact</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Ben Ashbaugh, Intel (ben <em>dot</em> ashbaugh <em>at</em> intel <em>dot</em> com)</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_contributors">Contributors</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Ben Ashbaugh, Intel<br> | |
| Felix J Degrood, Intel<br> | |
| Biju George, Intel<br> | |
| Raun M Krisch, Intel<br> | |
| Konstantin A Pyjov, Intel<br> | |
| Insoo Woo, Intel</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_notice">Notice</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Copyright (c) 2018 Intel Corporation. All rights reserved.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_status">Status</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Final Draft</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_version">Version</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Built On: 2018-11-16<br> | |
| Revision: 2</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_dependencies">Dependencies</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>OpenCL 1.2 and support for <span class="monospaced">cl_intel_subgroups</span> is required. | |
| This extension is written against the OpenCL API Specification Version 2.2 (revision v2.2-7), against the OpenCL C Language Specification Version 2.0 (revision v2.2-7), and against version 4 of the <span class="monospaced">cl_intel_subgroups</span> specification.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_overview">Overview</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>The goal of this extension is to allow programmers to improve the performance of applications operating on 16-bit data types by extending the subgroup functions described in the <span class="monospaced">cl_intel_subgroups</span> extension to support 16-bit integer data types (<span class="monospaced">shorts</span> and <span class="monospaced">ushorts</span>). | |
| Specifically, the extension:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| Extends the subgroup broadcast function to allow 16-bit integer values to be broadcast from one work item to all other work items in the subgroup. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| Extends the subgroup scan and reduction functions to operate on 16-bit integer data types. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| Extends the Intel subgroup shuffle functions to allow arbitrarily exchanging 16-bit integer values among work items in the subgroup. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| Extends the Intel subgroup block read and write functions to allow reading and writing 16-bit integer data from images and buffers. | |
| </p> | |
| </li> | |
| </ul></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_new_api_functions">New API Functions</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>None.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_new_api_enums">New API Enums</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>None.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_new_opencl_c_functions">New OpenCL C Functions</h2> | |
| <div class="sectionbody"> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| Add <span class="monospaced">short</span> and <span class="monospaced">ushort</span> to the list of supported data types for the subgroup broadcast, scan, and reduction functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_broadcast</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x<span style="color: #990000">,</span> <span style="color: #008080">uint</span> sub_group_local_id <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_broadcast</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x<span style="color: #990000">,</span> <span style="color: #008080">uint</span> sub_group_local_id <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span></tt></pre></div></div> | |
| </div></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| Add <span class="monospaced">short</span>, <span class="monospaced">short2</span>, <span class="monospaced">short4</span>, <span class="monospaced">short8</span>, <span class="monospaced">short16</span>, <span class="monospaced">ushort</span>, <span class="monospaced">ushort2</span>, <span class="monospaced">ushort4</span>, <span class="monospaced">ushort8</span>, and <span class="monospaced">ushort16</span> to the list of <span class="monospaced">gentype</span> data types supported by the <span class="monospaced">sub_group_shuffle</span>, <span class="monospaced">sub_group_shuffle_down</span>, <span class="monospaced">sub_group_shuffle_up</span>, and <span class="monospaced">sub_group_shuffle_xor</span> functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_shuffle</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> data<span style="color: #990000">,</span> <span style="color: #008080">uint</span> c <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_shuffle_down</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">gentype</span> current<span style="color: #990000">,</span> <span style="color: #008080">gentype</span> next<span style="color: #990000">,</span> <span style="color: #008080">uint</span> delta <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_shuffle_up</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">gentype</span> previous<span style="color: #990000">,</span> <span style="color: #008080">gentype</span> current<span style="color: #990000">,</span> <span style="color: #008080">uint</span> delta <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_shuffle_xor</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> data<span style="color: #990000">,</span> <span style="color: #008080">uint</span> value <span style="color: #990000">)</span></tt></pre></div></div> | |
| </div></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| Add <span class="monospaced">ushort</span> variants of the subgroup block read and write functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us2</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us4</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us8</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us2</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us4</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us8</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us2</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us4</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us8</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort8</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us2</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us4</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us8</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort8</span> data <span style="color: #990000">)</span></tt></pre></div></div> | |
| </div></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| For naming consistency, also add suffixed aliases of the <span class="monospaced">uint</span> subgroup block read and write functions described in the <span class="monospaced">cl_intel_subgroups</span> extension: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui2</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui4</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui8</span></span><span style="color: #990000">(</span> <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui2</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui4</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui8</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui2</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui4</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui8</span></span><span style="color: #990000">(</span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui2</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui4</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui8</span></span><span style="color: #990000">(</span> <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span></tt></pre></div></div> | |
| </div></div> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_modifications_to_the_opencl_c_specification">Modifications to the OpenCL C Specification</h2> | |
| <div class="sectionbody"> | |
| <div class="sect2"> | |
| <h3 id="_additions_to_section_6_13_15_work_group_functions">Additions to Section 6.13.15 - "Work Group Functions"</h3> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| Add <span class="monospaced">short</span> and <span class="monospaced">ushort</span> to the list of supported data types for the subgroup broadcast, scan, and reduction functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <table class="tableblock frame-all grid-all" | |
| style=" | |
| width:100%; | |
| "> | |
| <col style="width:66%;"> | |
| <col style="width:33%;"> | |
| <thead> | |
| <tr> | |
| <th class="tableblock halign-left valign-top" > <strong>Function</strong></th> | |
| <th class="tableblock halign-left valign-top" > <strong>Description</strong></th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_broadcast</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">gentype</span> x<span style="color: #990000">,</span> | |
| <span style="color: #008080">uint</span> sub_group_local_id <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_broadcast</span></span><span style="color: #990000">(</span> | |
| <span style="color: #009900">short</span> x<span style="color: #990000">,</span> | |
| <span style="color: #008080">uint</span> sub_group_local_id <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_broadcast</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">ushort</span> x<span style="color: #990000">,</span> | |
| <span style="color: #008080">uint</span> sub_group_local_id <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Broadcasts the value of <em>x</em> for work item identified by <em>sub_group_local_id</em> (value returned by <strong>get_sub_group_local_id</strong>) to all work items in the subgroup. | |
| <em>sub_group_local_id</em> must be the same value for all work items in the subgroup.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_reduce_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_reduce_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_reduce_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_reduce_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Returns the result of the specified reduction operation for all values of <em>x</em> specified by work items in a subgroup.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_exclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_exclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_exclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_exclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Performs the specified exclusive scan operation of all values <em>x</em> specified by work items in a subgroup. | |
| The scan results are returned for each work item.</p> | |
| <p class="tableblock">The scan order is defined by increasing subgroup local ID within the subgroup.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_inclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x<span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_inclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x<span style="color: #990000">)</span> | |
| <span style="color: #008080">gentype</span> <span style="font-weight: bold"><span style="color: #000000">sub_group_scan_inclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">gentype</span> x<span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_add</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_min</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span> | |
| <span style="color: #009900">short</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #009900">short</span> x <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_scan_inclusive_max</span></span><span style="color: #990000">(</span> <span style="color: #008080">ushort</span> x <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Performs the specified inclusive scan operation of all values <em>x</em> specified by work items in a subgroup. | |
| The scan results are returned for each work item.</p> | |
| <p class="tableblock">The scan order is defined by increasing subgroup local ID within the subgroup.</p></td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div></div> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_additions_to_section_6_13_x_sub_group_shuffle_functions">Additions to Section 6.13.X - "Sub Group Shuffle Functions"</h3> | |
| <div class="paragraph"><p>This section was added by the <span class="monospaced">cl_intel_subgroups</span> extension.</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| Add <span class="monospaced">short</span>, <span class="monospaced">short2</span>, <span class="monospaced">short4</span>, <span class="monospaced">short8</span>, <span class="monospaced">short16</span>, <span class="monospaced">ushort</span>, <span class="monospaced">ushort2</span>, <span class="monospaced">ushort4</span>, <span class="monospaced">ushort8</span>, and <span class="monospaced">ushort16</span> to the list of data types supported by the <span class="monospaced">sub_group_shuffle</span>, <span class="monospaced">sub_group_shuffle_down</span>, <span class="monospaced">sub_group_shuffle_up</span>, and <span class="monospaced">sub_group_shuffle_xor</span> functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <div class="paragraph"><p>The OpenCL C programming language implements the following built-in functions to allow data to be exchanged among work items in a subgroup. | |
| These built-in functions need not be encountered by all work items in a subgroup executing the kernel, however, data may only be shuffled among work items encountering the subgroup shuffle function. | |
| Shuffling data from a work item that does not encounter the subgroup shuffle function will produce undefined results. | |
| For these functions, <span class="monospaced">gentype</span> is <span class="monospaced">float</span>, <span class="monospaced">float2</span>, <span class="monospaced">float4</span>, <span class="monospaced">float8</span>, <span class="monospaced">float16</span>, <span class="monospaced">short</span>, <span class="monospaced">short2</span>, <span class="monospaced">short4</span>, <span class="monospaced">short8</span>, <span class="monospaced">short16</span>, <span class="monospaced">ushort</span>, <span class="monospaced">ushort2</span>, <span class="monospaced">ushort4</span>, <span class="monospaced">ushort8</span>, <span class="monospaced">ushort16</span>, <span class="monospaced">int</span>, <span class="monospaced">int2</span>, <span class="monospaced">int4</span>, <span class="monospaced">int8</span>, <span class="monospaced">int16</span>, <span class="monospaced">uint</span>, <span class="monospaced">uint2</span>, <span class="monospaced">uint4</span>, <span class="monospaced">uint8</span>, <span class="monospaced">uint16</span>, <span class="monospaced">long</span>, or <span class="monospaced">ulong</span>.</p></div> | |
| <div class="paragraph"><p>If <span class="monospaced">cl_khr_fp16</span> is supported, <span class="monospaced">gentype</span> also includes <span class="monospaced">half</span>.</p></div> | |
| <div class="paragraph"><p>If <span class="monospaced">cl_khr_fp64</span> or doubles are supported, <span class="monospaced">gentype</span> also includes <span class="monospaced">double</span>.</p></div> | |
| </div></div> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_modifications_to_section_6_13_x_sub_group_read_and_write_functions">Modifications to Section 6.13.X "Sub Group Read and Write Functions"</h3> | |
| <div class="paragraph"><p>This section was added by the <span class="monospaced">cl_intel_subgroups</span> extension.</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| Add suffixed aliases of the previously un-suffixed 32-bit block read and write functions. There is no change to the description or behavior of these functions: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <table class="tableblock frame-all grid-all" | |
| style=" | |
| width:100%; | |
| "> | |
| <col style="width:55%;"> | |
| <col style="width:44%;"> | |
| <thead> | |
| <tr> | |
| <th class="tableblock halign-left valign-top" ><strong>Function</strong></th> | |
| <th class="tableblock halign-left valign-top" ><strong>Description</strong></th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read2</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read4</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read8</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui2</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui4</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui8</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Reads 1, 2, 4, or 8 uints of data for each work item in the subgroup from the specified pointer as a block operation…</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">uint8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_ui8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Reads 1, 2, 4, or 8 uints of data for each work item in the subgroup from the specified image at the specified coordinate as a block operation…</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> uint<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Writes 1, 2, 4, or 8 uints of data for each work item in the subgroup to the specified pointer as a block operation…</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_ui8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">uint8</span> data <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Writes 1, 2, 4, or 8 uints of data for each work item in the subgroup to the specified image at the specified coordinate as a block operation…</p></td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| Also, add <span class="monospaced">ushort</span> variants of the block read and write functions. In the descriptions of these functions, the "note below describing out-of-bounds behavior" is in the <span class="monospaced">cl_intel_subgroups</span> extension specification: | |
| </dt> | |
| <dd> | |
| <div class="openblock"> | |
| <div class="content"> | |
| <table class="tableblock frame-all grid-all" | |
| style=" | |
| width:100%; | |
| "> | |
| <col style="width:55%;"> | |
| <col style="width:44%;"> | |
| <thead> | |
| <tr> | |
| <th class="tableblock halign-left valign-top" ><strong>Function</strong></th> | |
| <th class="tableblock halign-left valign-top" ><strong>Description</strong></th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us2</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us4</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us8</span></span><span style="color: #990000">(</span> | |
| <span style="font-weight: bold"><span style="color: #0000FF">const</span></span> <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Reads 1, 2, 4, or 8 ushorts of data for each work item in the subgroup from the specified pointer as a block operation. | |
| The data is read strided, so the first value read is:</p> | |
| <p class="tableblock"><span class="monospaced">p[ sub_group_local_id ]</span></p> | |
| <p class="tableblock">and the second value read is:</p> | |
| <p class="tableblock"><span class="monospaced">p[ sub_group_local_id + max_sub_group_size ]</span></p> | |
| <p class="tableblock">etc.</p> | |
| <p class="tableblock"><em>p</em> must be aligned to a 32-bit (4-byte) boundary.</p> | |
| <p class="tableblock">There is no defined out-of-range behavior for these functions.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #008080">ushort</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort2</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort4</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span> | |
| <span style="color: #008080">ushort8</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_read_us8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Reads 1, 2, 4, or 8 ushorts of data for each work item in the subgroup from the specified <em>image</em> at the specified coordinate as a block operation. | |
| Note that the coordinate is a byte coordinate, not an image element coordinate. | |
| Also note that the image data is read without format conversion, so each work item may read multiple image elements | |
| (for images with element size smaller than 16-bits).</p> | |
| <p class="tableblock">The data is read row-by-row, so the first value read is from the row specified in the y-component of the provided <em>byte_coord</em>, the second value is read from the y-component of the provided <em>byte_coord</em> plus one, etc.</p> | |
| <p class="tableblock">Please see the note below describing out-of-bounds behavior for these functions.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">__global</span> ushort<span style="color: #990000">*</span> p<span style="color: #990000">,</span> <span style="color: #008080">ushort8</span> data <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Writes 1, 2, 4, or 8 ushorts of data for each work item in the subgroup to the specified pointer as a block operation. | |
| The data is written strided, so the first value is written to:</p> | |
| <p class="tableblock"><span class="monospaced">p[ sub_group_local_id ]</span></p> | |
| <p class="tableblock">and the second value is written to:</p> | |
| <p class="tableblock"><span class="monospaced">p[ sub_group_local_id + max_sub_group_size ]</span></p> | |
| <p class="tableblock">etc.</p> | |
| <p class="tableblock"><em>p</em> must be aligned to a 128-bit (16-byte) boundary.</p> | |
| <p class="tableblock">There is no defined out-of-range behavior for these functions.</p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><div><div class="listingblock"> | |
| <div class="content"><!-- Generator: GNU source-highlight 3.1.8 | |
| by Lorenzo Bettini | |
| http://www.lorenzobettini.it | |
| http://www.gnu.org/software/src-highlite --> | |
| <pre><tt><span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us2</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort2</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us4</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort4</span> data <span style="color: #990000">)</span> | |
| <span style="color: #009900">void</span> <span style="font-weight: bold"><span style="color: #000000">intel_sub_group_block_write_us8</span></span><span style="color: #990000">(</span> | |
| <span style="color: #008080">image2d_t</span> image<span style="color: #990000">,</span> | |
| <span style="color: #008080">int2</span> byte_coord<span style="color: #990000">,</span> <span style="color: #008080">ushort8</span> data <span style="color: #990000">)</span></tt></pre></div></div></div></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Writes 1, 2, 4, or 8 ushorts of data for each work item in the subgroup to the specified <em>image</em> at the specified coordinate as a block operation. | |
| Note that the coordinate is a byte coordinate, not an image element coordinate. | |
| Unlike the image block read function, which may read from any arbitrary byte offset, the x-component of the byte coordinate for the image block write functions must be a multiple of four; | |
| in other words, the write must begin at 32-bit boundary. | |
| There is no restriction on the y-component of the coordinate. | |
| Also, note that the image <em>data</em> is written without format conversion, so each work item may write multiple image elements (for images with element size smaller than 8-bits).</p> | |
| <p class="tableblock">The data is written row-by-row, so the first value written is from the row specified by the y-component of the provided <em>byte_coord</em>, the second value is written from the y-component of the provided <em>byte_coord</em> plus one, etc.</p> | |
| <p class="tableblock">Please see the note below describing out-of-bounds behavior for these functions.</p></td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div></div> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_issues">Issues</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>None.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_revision_history">Revision History</h2> | |
| <div class="sectionbody"> | |
| <table class="tableblock frame-all grid-rows" | |
| style=" | |
| width:100%; | |
| "> | |
| <col style="width:4%;"> | |
| <col style="width:14%;"> | |
| <col style="width:14%;"> | |
| <col style="width:66%;"> | |
| <thead> | |
| <tr> | |
| <th class="tableblock halign-left valign-top" >Rev</th> | |
| <th class="tableblock halign-left valign-top" >Date</th> | |
| <th class="tableblock halign-left valign-top" >Author</th> | |
| <th class="tableblock halign-left valign-top" >Changes</th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">1</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">2016-10-20</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Ben Ashbaugh</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock"><strong>First public revision.</strong></p></td> | |
| </tr> | |
| <tr> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">2</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">2018-11-15</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Ben Ashbaugh</p></td> | |
| <td class="tableblock halign-left valign-top" ><p class="tableblock">Conversion to asciidoc.</p></td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div> | |
| </div> | |
| </div> | |
| <div id="footnotes"><hr></div> | |
| <div id="footer"> | |
| <div id="footer-text"> | |
| Last updated | |
| 2018-11-16 09:32:34 PST | |
| </div> | |
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| </body> | |
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