| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="UTF-8"> |
| <!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]--> |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> |
| <meta name="generator" content="Asciidoctor 1.5.8"> |
| <title>cl_intel_spirv_media_block_io</title> |
| <style> |
| /*! normalize.css v2.1.2 | MIT License | git.io/normalize */ |
| /* ========================================================================== HTML5 display definitions ========================================================================== */ |
| /** Correct `block` display not defined in IE 8/9. */ |
| article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary { display: block; } |
| |
| /** Correct `inline-block` display not defined in IE 8/9. */ |
| audio, canvas, video { display: inline-block; } |
| |
| /** Prevent modern browsers from displaying `audio` without controls. Remove excess height in iOS 5 devices. */ |
| audio:not([controls]) { display: none; height: 0; } |
| |
| /** Address `[hidden]` styling not present in IE 8/9. Hide the `template` element in IE, Safari, and Firefox < 22. */ |
| [hidden], template { display: none; } |
| |
| script { display: none !important; } |
| |
| /* ========================================================================== Base ========================================================================== */ |
| /** 1. Set default font family to sans-serif. 2. Prevent iOS text size adjust after orientation change, without disabling user zoom. */ |
| html { font-family: sans-serif; /* 1 */ -ms-text-size-adjust: 100%; /* 2 */ -webkit-text-size-adjust: 100%; /* 2 */ } |
| |
| /** Remove default margin. */ |
| body { margin: 0; } |
| |
| /* ========================================================================== Links ========================================================================== */ |
| /** Remove the gray background color from active links in IE 10. */ |
| a { background: transparent; } |
| |
| /** Address `outline` inconsistency between Chrome and other browsers. */ |
| a:focus { outline: thin dotted; } |
| |
| /** Improve readability when focused and also mouse hovered in all browsers. */ |
| a:active, a:hover { outline: 0; } |
| |
| /* ========================================================================== Typography ========================================================================== */ |
| /** Address variable `h1` font-size and margin within `section` and `article` contexts in Firefox 4+, Safari 5, and Chrome. */ |
| h1 { font-size: 2em; margin: 0.67em 0; } |
| |
| /** Address styling not present in IE 8/9, Safari 5, and Chrome. */ |
| abbr[title] { border-bottom: 1px dotted; } |
| |
| /** Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome. */ |
| b, strong { font-weight: bold; } |
| |
| /** Address styling not present in Safari 5 and Chrome. */ |
| dfn { font-style: italic; } |
| |
| /** Address differences between Firefox and other browsers. */ |
| hr { -moz-box-sizing: content-box; box-sizing: content-box; height: 0; } |
| |
| /** Address styling not present in IE 8/9. */ |
| mark { background: #ff0; color: #000; } |
| |
| /** Correct font family set oddly in Safari 5 and Chrome. */ |
| code, kbd, pre, samp { font-family: monospace, serif; font-size: 1em; } |
| |
| /** Improve readability of pre-formatted text in all browsers. */ |
| pre { white-space: pre-wrap; } |
| |
| /** Set consistent quote types. */ |
| q { quotes: "\201C" "\201D" "\2018" "\2019"; } |
| |
| /** Address inconsistent and variable font size in all browsers. */ |
| small { font-size: 80%; } |
| |
| /** Prevent `sub` and `sup` affecting `line-height` in all browsers. */ |
| sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; } |
| |
| sup { top: -0.5em; } |
| |
| sub { bottom: -0.25em; } |
| |
| /* ========================================================================== Embedded content ========================================================================== */ |
| /** Remove border when inside `a` element in IE 8/9. */ |
| img { border: 0; } |
| |
| /** Correct overflow displayed oddly in IE 9. */ |
| svg:not(:root) { overflow: hidden; } |
| |
| /* ========================================================================== Figures ========================================================================== */ |
| /** Address margin not present in IE 8/9 and Safari 5. */ |
| figure { margin: 0; } |
| |
| /* ========================================================================== Forms ========================================================================== */ |
| /** Define consistent border, margin, and padding. */ |
| fieldset { border: 1px solid #c0c0c0; margin: 0 2px; padding: 0.35em 0.625em 0.75em; } |
| |
| /** 1. Correct `color` not being inherited in IE 8/9. 2. Remove padding so people aren't caught out if they zero out fieldsets. */ |
| legend { border: 0; /* 1 */ padding: 0; /* 2 */ } |
| |
| /** 1. Correct font family not being inherited in all browsers. 2. Correct font size not being inherited in all browsers. 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome. */ |
| button, input, select, textarea { font-family: inherit; /* 1 */ font-size: 100%; /* 2 */ margin: 0; /* 3 */ } |
| |
| /** Address Firefox 4+ setting `line-height` on `input` using `!important` in the UA stylesheet. */ |
| button, input { line-height: normal; } |
| |
| /** Address inconsistent `text-transform` inheritance for `button` and `select`. All other form control elements do not inherit `text-transform` values. Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+. Correct `select` style inheritance in Firefox 4+ and Opera. */ |
| button, select { text-transform: none; } |
| |
| /** 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio` and `video` controls. 2. Correct inability to style clickable `input` types in iOS. 3. Improve usability and consistency of cursor style between image-type `input` and others. */ |
| button, html input[type="button"], input[type="reset"], input[type="submit"] { -webkit-appearance: button; /* 2 */ cursor: pointer; /* 3 */ } |
| |
| /** Re-set default cursor for disabled elements. */ |
| button[disabled], html input[disabled] { cursor: default; } |
| |
| /** 1. Address box sizing set to `content-box` in IE 8/9. 2. Remove excess padding in IE 8/9. */ |
| input[type="checkbox"], input[type="radio"] { box-sizing: border-box; /* 1 */ padding: 0; /* 2 */ } |
| |
| /** 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome. 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome (include `-moz` to future-proof). */ |
| input[type="search"] { -webkit-appearance: textfield; /* 1 */ -moz-box-sizing: content-box; -webkit-box-sizing: content-box; /* 2 */ box-sizing: content-box; } |
| |
| /** Remove inner padding and search cancel button in Safari 5 and Chrome on OS X. */ |
| input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; } |
| |
| /** Remove inner padding and border in Firefox 4+. */ |
| button::-moz-focus-inner, input::-moz-focus-inner { border: 0; padding: 0; } |
| |
| /** 1. Remove default vertical scrollbar in IE 8/9. 2. Improve readability and alignment in all browsers. */ |
| textarea { overflow: auto; /* 1 */ vertical-align: top; /* 2 */ } |
| |
| /* ========================================================================== Tables ========================================================================== */ |
| /** Remove most spacing between table cells. */ |
| table { border-collapse: collapse; border-spacing: 0; } |
| |
| meta.foundation-mq-small { font-family: "only screen and (min-width: 768px)"; width: 768px; } |
| |
| meta.foundation-mq-medium { font-family: "only screen and (min-width:1280px)"; width: 1280px; } |
| |
| meta.foundation-mq-large { font-family: "only screen and (min-width:1440px)"; width: 1440px; } |
| |
| *, *:before, *:after { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } |
| |
| html, body { font-size: 100%; } |
| |
| body { background: white; color: #222222; padding: 0; margin: 0; font-family: "Helvetica Neue", "Helvetica", Helvetica, Arial, sans-serif; font-weight: normal; font-style: normal; line-height: 1; position: relative; cursor: auto; } |
| |
| a:hover { cursor: pointer; } |
| |
| img, object, embed { max-width: 100%; height: auto; } |
| |
| object, embed { height: 100%; } |
| |
| img { -ms-interpolation-mode: bicubic; } |
| |
| #map_canvas img, #map_canvas embed, #map_canvas object, .map_canvas img, .map_canvas embed, .map_canvas object { max-width: none !important; } |
| |
| .left { float: left !important; } |
| |
| .right { float: right !important; } |
| |
| .text-left { text-align: left !important; } |
| |
| .text-right { text-align: right !important; } |
| |
| .text-center { text-align: center !important; } |
| |
| .text-justify { text-align: justify !important; } |
| |
| .hide { display: none; } |
| |
| .antialiased { -webkit-font-smoothing: antialiased; } |
| |
| img { display: inline-block; vertical-align: middle; } |
| |
| textarea { height: auto; min-height: 50px; } |
| |
| select { width: 100%; } |
| |
| object, svg { display: inline-block; vertical-align: middle; } |
| |
| .center { margin-left: auto; margin-right: auto; } |
| |
| .spread { width: 100%; } |
| |
| p.lead, .paragraph.lead > p, #preamble > .sectionbody > .paragraph:first-of-type p { font-size: 1.21875em; line-height: 1.6; } |
| |
| .subheader, .admonitionblock td.content > .title, .audioblock > .title, .exampleblock > .title, .imageblock > .title, .listingblock > .title, .literalblock > .title, .stemblock > .title, .openblock > .title, .paragraph > .title, .quoteblock > .title, table.tableblock > .title, .verseblock > .title, .videoblock > .title, .dlist > .title, .olist > .title, .ulist > .title, .qlist > .title, .hdlist > .title { line-height: 1.4; color: black; font-weight: 300; margin-top: 0.2em; margin-bottom: 0.5em; } |
| |
| /* Typography resets */ |
| div, dl, dt, dd, ul, ol, li, h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6, pre, form, p, blockquote, th, td { margin: 0; padding: 0; direction: ltr; } |
| |
| /* Default Link Styles */ |
| a { color: #0068b0; text-decoration: none; line-height: inherit; } |
| a:hover, a:focus { color: #333333; } |
| a img { border: none; } |
| |
| /* Default paragraph styles */ |
| p { font-family: Noto, sans-serif; font-weight: normal; font-size: 1em; line-height: 1.6; margin-bottom: 0.75em; text-rendering: optimizeLegibility; } |
| p aside { font-size: 0.875em; line-height: 1.35; font-style: italic; } |
| |
| /* Default header styles */ |
| h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { font-family: Noto, sans-serif; font-weight: normal; font-style: normal; color: black; text-rendering: optimizeLegibility; margin-top: 0.5em; margin-bottom: 0.5em; line-height: 1.2125em; } |
| h1 small, h2 small, h3 small, #toctitle small, .sidebarblock > .content > .title small, h4 small, h5 small, h6 small { font-size: 60%; color: #4d4d4d; line-height: 0; } |
| |
| h1 { font-size: 2.125em; } |
| |
| h2 { font-size: 1.6875em; } |
| |
| h3, #toctitle, .sidebarblock > .content > .title { font-size: 1.375em; } |
| |
| h4 { font-size: 1.125em; } |
| |
| h5 { font-size: 1.125em; } |
| |
| h6 { font-size: 1em; } |
| |
| hr { border: solid #dddddd; border-width: 1px 0 0; clear: both; margin: 1.25em 0 1.1875em; height: 0; } |
| |
| /* Helpful Typography Defaults */ |
| em, i { font-style: italic; line-height: inherit; } |
| |
| strong, b { font-weight: bold; line-height: inherit; } |
| |
| small { font-size: 60%; line-height: inherit; } |
| |
| code { font-family: Consolas, "Liberation Mono", Courier, monospace; font-weight: normal; color: #264357; } |
| |
| /* Lists */ |
| ul, ol, dl { font-size: 1em; line-height: 1.6; margin-bottom: 0.75em; list-style-position: outside; font-family: Noto, sans-serif; } |
| |
| ul, ol { margin-left: 1.5em; } |
| ul.no-bullet, ol.no-bullet { margin-left: 1.5em; } |
| |
| /* Unordered Lists */ |
| ul li ul, ul li ol { margin-left: 1.25em; margin-bottom: 0; font-size: 1em; /* Override nested font-size change */ } |
| ul.square li ul, ul.circle li ul, ul.disc li ul { list-style: inherit; } |
| ul.square { list-style-type: square; } |
| ul.circle { list-style-type: circle; } |
| ul.disc { list-style-type: disc; } |
| ul.no-bullet { list-style: none; } |
| |
| /* Ordered Lists */ |
| ol li ul, ol li ol { margin-left: 1.25em; margin-bottom: 0; } |
| |
| /* Definition Lists */ |
| dl dt { margin-bottom: 0.3em; font-weight: bold; } |
| dl dd { margin-bottom: 0.75em; } |
| |
| /* Abbreviations */ |
| abbr, acronym { text-transform: uppercase; font-size: 90%; color: black; border-bottom: 1px dotted #dddddd; cursor: help; } |
| |
| abbr { text-transform: none; } |
| |
| /* Blockquotes */ |
| blockquote { margin: 0 0 0.75em; padding: 0.5625em 1.25em 0 1.1875em; border-left: 1px solid #dddddd; } |
| blockquote cite { display: block; font-size: 0.8125em; color: #5e93b8; } |
| blockquote cite:before { content: "\2014 \0020"; } |
| blockquote cite a, blockquote cite a:visited { color: #5e93b8; } |
| |
| blockquote, blockquote p { line-height: 1.6; color: #333333; } |
| |
| /* Microformats */ |
| .vcard { display: inline-block; margin: 0 0 1.25em 0; border: 1px solid #dddddd; padding: 0.625em 0.75em; } |
| .vcard li { margin: 0; display: block; } |
| .vcard .fn { font-weight: bold; font-size: 0.9375em; } |
| |
| .vevent .summary { font-weight: bold; } |
| .vevent abbr { cursor: auto; text-decoration: none; font-weight: bold; border: none; padding: 0 0.0625em; } |
| |
| @media only screen and (min-width: 768px) { h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { line-height: 1.4; } |
| h1 { font-size: 2.75em; } |
| h2 { font-size: 2.3125em; } |
| h3, #toctitle, .sidebarblock > .content > .title { font-size: 1.6875em; } |
| h4 { font-size: 1.4375em; } } |
| /* Tables */ |
| table { background: white; margin-bottom: 1.25em; border: solid 1px #d8d8ce; } |
| table thead, table tfoot { background: -webkit-linear-gradient(top, #add386, #90b66a); font-weight: bold; } |
| table thead tr th, table thead tr td, table tfoot tr th, table tfoot tr td { padding: 0.5em 0.625em 0.625em; font-size: inherit; color: white; text-align: left; } |
| table tr th, table tr td { padding: 0.5625em 0.625em; font-size: inherit; color: #6d6e71; } |
| table tr.even, table tr.alt, table tr:nth-of-type(even) { background: #edf2f2; } |
| table thead tr th, table tfoot tr th, table tbody tr td, table tr td, table tfoot tr td { display: table-cell; line-height: 1.4; } |
| |
| body { -moz-osx-font-smoothing: grayscale; -webkit-font-smoothing: antialiased; tab-size: 4; } |
| |
| h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { line-height: 1.4; } |
| |
| a:hover, a:focus { text-decoration: underline; } |
| |
| .clearfix:before, .clearfix:after, .float-group:before, .float-group:after { content: " "; display: table; } |
| .clearfix:after, .float-group:after { clear: both; } |
| |
| *:not(pre) > code { font-size: inherit; font-style: normal !important; letter-spacing: 0; padding: 0; background-color: white; -webkit-border-radius: 0; border-radius: 0; line-height: inherit; word-wrap: break-word; } |
| *:not(pre) > code.nobreak { word-wrap: normal; } |
| *:not(pre) > code.nowrap { white-space: nowrap; } |
| |
| pre, pre > code { line-height: 1.6; color: #264357; font-family: Consolas, "Liberation Mono", Courier, monospace; font-weight: normal; } |
| |
| em em { font-style: normal; } |
| |
| strong strong { font-weight: normal; } |
| |
| .keyseq { color: #333333; } |
| |
| kbd { font-family: Consolas, "Liberation Mono", Courier, monospace; display: inline-block; color: black; font-size: 0.65em; line-height: 1.45; background-color: #f7f7f7; border: 1px solid #ccc; -webkit-border-radius: 3px; border-radius: 3px; -webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 0.1em white inset; box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 0.1em white inset; margin: 0 0.15em; padding: 0.2em 0.5em; vertical-align: middle; position: relative; top: -0.1em; white-space: nowrap; } |
| |
| .keyseq kbd:first-child { margin-left: 0; } |
| |
| .keyseq kbd:last-child { margin-right: 0; } |
| |
| .menuseq, .menuref { color: #000; } |
| |
| .menuseq b:not(.caret), .menuref { font-weight: inherit; } |
| |
| .menuseq { word-spacing: -0.02em; } |
| .menuseq b.caret { font-size: 1.25em; line-height: 0.8; } |
| .menuseq i.caret { font-weight: bold; text-align: center; width: 0.45em; } |
| |
| b.button:before, b.button:after { position: relative; top: -1px; font-weight: normal; } |
| |
| b.button:before { content: "["; padding: 0 3px 0 2px; } |
| |
| b.button:after { content: "]"; padding: 0 2px 0 3px; } |
| |
| #header, #content, #footnotes, #footer { width: 100%; margin-left: auto; margin-right: auto; margin-top: 0; margin-bottom: 0; max-width: 62.5em; *zoom: 1; position: relative; padding-left: 1.5em; padding-right: 1.5em; } |
| #header:before, #header:after, #content:before, #content:after, #footnotes:before, #footnotes:after, #footer:before, #footer:after { content: " "; display: table; } |
| #header:after, #content:after, #footnotes:after, #footer:after { clear: both; } |
| |
| #content { margin-top: 1.25em; } |
| |
| #content:before { content: none; } |
| |
| #header > h1:first-child { color: black; margin-top: 2.25rem; margin-bottom: 0; } |
| #header > h1:first-child + #toc { margin-top: 8px; border-top: 1px solid #dddddd; } |
| #header > h1:only-child, body.toc2 #header > h1:nth-last-child(2) { border-bottom: 1px solid #dddddd; padding-bottom: 8px; } |
| #header .details { border-bottom: 1px solid #dddddd; line-height: 1.45; padding-top: 0.25em; padding-bottom: 0.25em; padding-left: 0.25em; color: #5e93b8; display: -ms-flexbox; display: -webkit-flex; display: flex; -ms-flex-flow: row wrap; -webkit-flex-flow: row wrap; flex-flow: row wrap; } |
| #header .details span:first-child { margin-left: -0.125em; } |
| #header .details span.email a { color: #333333; } |
| #header .details br { display: none; } |
| #header .details br + span:before { content: "\00a0\2013\00a0"; } |
| #header .details br + span.author:before { content: "\00a0\22c5\00a0"; color: #333333; } |
| #header .details br + span#revremark:before { content: "\00a0|\00a0"; } |
| #header #revnumber { text-transform: capitalize; } |
| #header #revnumber:after { content: "\00a0"; } |
| |
| #content > h1:first-child:not([class]) { color: black; border-bottom: 1px solid #dddddd; padding-bottom: 8px; margin-top: 0; padding-top: 1rem; margin-bottom: 1.25rem; } |
| |
| #toc { border-bottom: 0 solid #dddddd; padding-bottom: 0.5em; } |
| #toc > ul { margin-left: 0.125em; } |
| #toc ul.sectlevel0 > li > a { font-style: italic; } |
| #toc ul.sectlevel0 ul.sectlevel1 { margin: 0.5em 0; } |
| #toc ul { font-family: Noto, sans-serif; list-style-type: none; } |
| #toc li { line-height: 1.3334; margin-top: 0.3334em; } |
| #toc a { text-decoration: none; } |
| #toc a:active { text-decoration: underline; } |
| |
| #toctitle { color: black; font-size: 1.2em; } |
| |
| @media only screen and (min-width: 768px) { #toctitle { font-size: 1.375em; } |
| body.toc2 { padding-left: 15em; padding-right: 0; } |
| #toc.toc2 { margin-top: 0 !important; background-color: white; position: fixed; width: 15em; left: 0; top: 0; border-right: 1px solid #dddddd; border-top-width: 0 !important; border-bottom-width: 0 !important; z-index: 1000; padding: 1.25em 1em; height: 100%; overflow: auto; } |
| #toc.toc2 #toctitle { margin-top: 0; margin-bottom: 0.8rem; font-size: 1.2em; } |
| #toc.toc2 > ul { font-size: 0.9em; margin-bottom: 0; } |
| #toc.toc2 ul ul { margin-left: 0; padding-left: 1em; } |
| #toc.toc2 ul.sectlevel0 ul.sectlevel1 { padding-left: 0; margin-top: 0.5em; margin-bottom: 0.5em; } |
| body.toc2.toc-right { padding-left: 0; padding-right: 15em; } |
| body.toc2.toc-right #toc.toc2 { border-right-width: 0; border-left: 1px solid #dddddd; left: auto; right: 0; } } |
| @media only screen and (min-width: 1280px) { body.toc2 { padding-left: 20em; padding-right: 0; } |
| #toc.toc2 { width: 20em; } |
| #toc.toc2 #toctitle { font-size: 1.375em; } |
| #toc.toc2 > ul { font-size: 0.95em; } |
| #toc.toc2 ul ul { padding-left: 1.25em; } |
| body.toc2.toc-right { padding-left: 0; padding-right: 20em; } } |
| #content #toc { border-style: solid; border-width: 1px; border-color: #e6e6e6; margin-bottom: 1.25em; padding: 1.25em; background: white; -webkit-border-radius: 0; border-radius: 0; } |
| #content #toc > :first-child { margin-top: 0; } |
| #content #toc > :last-child { margin-bottom: 0; } |
| |
| #footer { max-width: 100%; background-color: none; padding: 1.25em; } |
| |
| #footer-text { color: black; line-height: 1.44; } |
| |
| #content { margin-bottom: 0.625em; } |
| |
| .sect1 { padding-bottom: 0.625em; } |
| |
| @media only screen and (min-width: 768px) { #content { margin-bottom: 1.25em; } |
| .sect1 { padding-bottom: 1.25em; } } |
| .sect1:last-child { padding-bottom: 0; } |
| |
| .sect1 + .sect1 { border-top: 0 solid #dddddd; } |
| |
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| <body class="book"> |
| <div id="header"> |
| <h1>cl_intel_spirv_media_block_io</h1> |
| <div class="details"> |
| <span id="revnumber">version V2.2-11-30-g5ba09e4,</span> |
| <span id="revdate">Thu, 24 Oct 2019 22:38:29 +0000</span> |
| <br><span id="revremark">from git branch: public_master commit: 5ba09e43bb29a2292d6af0b70148a9f846e1806f</span> |
| </div> |
| </div> |
| <div id="content"> |
| <div class="sect1"> |
| <h2 id="_name_strings">Name Strings</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><code>cl_intel_spirv_media_block_io</code></p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_contact">Contact</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Ben Ashbaugh, Intel (ben 'dot' ashbaugh 'at' intel 'dot' com)</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_contributors">Contributors</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Ben Ashbaugh, Intel<br> |
| Biju George, Intel<br> |
| Pawel Jurek, Intel</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_notice">Notice</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Copyright (c) 2018-2019 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: 2019-10-23<br> |
| Revision: 2</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_dependencies">Dependencies</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This extension is written against the OpenCL SPIR-V Environment Specification Version 2.2, Revision v2.2-3.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This extension requires OpenCL support for SPIR-V, either via OpenCL 2.1 or via the <code>cl_khr_il_program</code> extension, and support for the <code>cl_intel_media_block_io</code> extension.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This extension interacts with the <code>cl_intel_packed_yuv</code> extension.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This extension interacts with the <code>cl_intel_planar_yuv</code> extension.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_overview">Overview</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This extension defines how modules using the SPIR-V extension <code>SPV_INTEL_media_block_io</code> may behave in an OpenCL environment.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This extension is a companion to the <code>cl_intel_media_block_io</code> OpenCL extension, and the functionality described in this extension and <code>SPV_INTEL_media_block_io</code> is sufficient to implement the built-in functions defined in the <code>cl_intel_media_block_io</code> extension.</p> |
| </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="_modifications_to_the_opencl_spir_v_environment_specification">Modifications to the OpenCL SPIR-V Environment Specification</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="_add_a_new_section_7_1_x_cl_intel_spirv_media_block_io">Add a new Section 7.1.X - <code>cl_intel_spirv_media_block_io</code></h3> |
| <div class="paragraph"> |
| <p>If the OpenCL environment supports the extension <code>cl_intel_spirv_media_block_io</code>, then the environment must accept SPIR-V modules that declare use of the <code>SPV_INTEL_media_block_io</code> extension via <strong>OpExtension</strong>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If the OpenCL environment supports the extension <code>cl_intel_spirv_media_block_io</code> and use of the <code>SPV_INTEL_media_block_io</code> extension is declared in the module via <strong>OpExtension</strong>, then the environment must accept modules that declare the following SPIR-V capabilities:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><strong>SubgroupImageMediaBlockIOINTEL</strong></p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>Additionally, the environment must accept the following types for 'Result Type' for <strong>OpSubgroupImageMediaBlockReadINTEL</strong>, and for the type of 'Data' for <strong>OpSubgroupImageMediaBlockWriteINTEL</strong>:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Scalars and <strong>OpTypeVectors</strong> with 2, 4, 8, or 16 <em>Component Count</em> components of the following <em>Component Type</em> types:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><strong>OpTypeInt</strong> with a <em>Width</em> of 8 bits and <em>Signedness</em> of 0 (equivalent to <code>char</code> and <code>uchar</code>)</p> |
| </li> |
| <li> |
| <p><strong>OpTypeInt</strong> with a <em>Width</em> of 16 bits and <em>Signedness</em> of 0 (equivalent to <code>short</code> and <code>ushort</code>)</p> |
| </li> |
| <li> |
| <p><strong>OpTypeInt</strong> with a <em>Width</em> of 32 bits and <em>Signedness</em> of 0 (equivalent to <code>int</code> and <code>uint</code>)</p> |
| </li> |
| </ul> |
| </div> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>For <em>Image</em>:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><em>Dim</em> must be <strong>2D</strong></p> |
| </li> |
| <li> |
| <p><em>Depth</em> must be 0 (not a depth image)</p> |
| </li> |
| <li> |
| <p><em>Arrayed</em> must be 0 (non-arrayed content)</p> |
| </li> |
| <li> |
| <p><em>MS</em> must be 0 (single-sampled content)</p> |
| </li> |
| <li> |
| <p>(equivalent to <code>image2d_t</code>)</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>For 'Coordinate', the following types are supported:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><strong>OpTypeVectors</strong> with 2 <em>Component Count</em> components of <em>Component Type</em> <strong>OpTypeInt</strong> with a <em>Width</em> of 32 bits and <em>Signedness</em> of 0 (equivalent to <code>int2</code>)</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>For 'Width' and 'Height', the following type is supported:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Scalars of <strong>OpTypeInt</strong> with a <em>Width</em> of 32 bits and a <em>Signedness</em> of 0 (equivalent to <code>int</code>)</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_add_a_new_section_7_1_x_1_notes_and_restrictions">Add a new Section 7.1.X.1 - Notes and Restrictions</h3> |
| <div class="paragraph"> |
| <p>Both <strong>OpSubgroupImageMediaBlockReadINTEL</strong> and <strong>OpSubgroupImageMediaBlockWriteINTEL</strong> must be encountered by all work items in the subgroup executing the kernel, otherwise the behavior is undefined (i.e. they can only be used in convergent control flow where all the work items in the subgroup are enabled).</p> |
| </div> |
| <div class="paragraph"> |
| <p>The block 'Width' determines the maximum 'Height' for <strong>OpSubgroupImageMediaBlockReadINTEL</strong> and <strong>OpSubgroupImageMediaBlockWriteINTEL</strong>, and is summarized in the following table:</p> |
| </div> |
| <table class="tableblock frame-all grid-all stretch"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top"><strong>Width (bytes)</strong></th> |
| <th class="tableblock halign-left valign-top"><strong>Maximum Height (rows)</strong></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">4</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">64</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">8</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">32</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">12, 16</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">16</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">20, 24, 28, 32</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">8</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="paragraph"> |
| <p>Both the first component of 'Component', which represents the byte offset into the 'Image', and the block 'Width' must be four byte aligned.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Both the block 'Width' and 'Height' must be compile time constants.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The 'Image' operand must only be used by other <strong>SubgroupImageMediaBlockIOINTEL</strong> instructions or image query instructions. They may not be used by any other instructions that read texels from or write texels to the 'Image'.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Behavior is undefined if 'Image' is a planar YUV image, however 'Image' may represent an individual plane of a planar YUV image.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The 'Image' operand must be created such that the image byte width, defined as the image width multiplied by the 'Image Format' size, is a multiple of four bytes.</p> |
| </div> |
| <div class="paragraph"> |
| <p>For <strong>OpSubgroupImageMediaBlockReadINTEL</strong>, if the 'Image Format' size is smaller than the block read 'Component Type', then an out-of-bounds read will return data replicated from the nearest edge element, otherwise out-of-bound read behavior is undefined. For example:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>For an image with 'Image Format' size equal to a single byte (for example <strong>R8</strong>), and a 32-bit boundary value <code>B0B1B2B3</code>, replicating off the left edge may result in the 32-bit value <code>B0B0B0B0</code>, and replicating off the right edge may result in the 32-bit value <code>B3B3B3B3</code>.</p> |
| </li> |
| <li> |
| <p>For an image with an 'Image Format' size equal to two bytes (for example <strong>R16</strong>), replicating off the left edge may result in the 32-bit value <code>B0B1B0B1</code>, and replicating off the right edge may result in the 32-bit value <code>B2B3B2B3</code>.</p> |
| </li> |
| <li> |
| <p>For an image with an 'Image Format' size equal to four bytes (for example <strong>Rgba8</strong>), the entire boundary value is replicated, for both the left or right edges.</p> |
| </li> |
| <li> |
| <p>Because the maximum 'Component Type' is a four byte component type, there is no defined out-of-bounds behavior for images with an 'Image Format' size greater than four bytes.</p> |
| </li> |
| <li> |
| <p>As a special case, an image with a packed YUV 'Image Format' (and hence an 'Image Format' size equal to two bytes) behaves as follows:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Replicating off of the left edge replicates the UV components and the first Y component, so, for example, replicating the 32-bit boundary value <code>Y0U0Y1V0</code> will result in the 32-bit value <code>Y0U0Y0V0</code>.</p> |
| </li> |
| <li> |
| <p>Replicating off the right edge replicates the UV components and the second Y component, so, for example, replicating the 32-bit boundary value <code>Y0U0Y1V0</code> will result in the 32-bit value <code>Y1U0Y1V0</code>.</p> |
| </li> |
| </ul> |
| </div> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>For <strong>OpSubgroupImageMediaBlockWriteINTEL</strong>, if the 'Image Format' size is smaller than the block write 'Component Type', then out-of-bounds writes will be dropped, otherwise out-of-bounds write behavior is undefined.</p> |
| </div> |
| <div class="paragraph"> |
| <p>When reading or writing a 2D 'Image' created from a buffer:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The 'image row pitch' is required to be a multiple of 64-bytes, in addition to the <code>CL_DEVICE_IMAGE_PITCH_ALIGNMENT</code> requirements.</p> |
| </li> |
| <li> |
| <p>If the buffer is a <code>cl_mem</code> that was created with <code>CL_MEM_USE_HOST_PTR</code>, then the <em>host_ptr</em> must be 256-bit (32-byte) aligned.</p> |
| </li> |
| <li> |
| <p>If the buffer is a <code>cl_mem</code> that is a sub-buffer, then the <em>origin</em> must be a multiple of 32-bytes. Additionally, if the <em>buffer</em> that the sub-buffer is created from was created with <code>CL_MEM_USE_HOST_PTR</code>, then the <em>host_ptr</em> for the <em>buffer</em> must be 256-bit (32-byte) aligned.</p> |
| </li> |
| <li> |
| <p>The maximum 'Height' is further restricted to 16 rows or less.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>Behavior is undefined if the size of the 2D source region (defined by the type of 'Data' and <strong>SubgroupMaxSize</strong>) is smaller than the size of the 2D region to write (defined by 'Width', 'Height', and block write 'Component Type').</p> |
| </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 stretch"> |
| <colgroup> |
| <col style="width: 4.7619%;"> |
| <col style="width: 14.2857%;"> |
| <col style="width: 14.2857%;"> |
| <col style="width: 66.6667%;"> |
| </colgroup> |
| <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">2018-10-29</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>Initial 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">2019-09-17</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">Minor formatting fixes for asciidoctor.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div id="footer"> |
| <div id="footer-text"> |
| Version V2.2-11-30-g5ba09e4<br> |
| Last updated 2019-10-23 15:35:34 -0700 |
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