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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `_mm_mpsadbw_epu8` fn in crate `core`."><meta name="keywords" content="rust, rustlang, rust-lang, _mm_mpsadbw_epu8"><title>core::arch::x86::_mm_mpsadbw_epu8 - Rust</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../../core/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><div class="sidebar-elems"><p class='location'><a href='../../index.html'>core</a>::<wbr><a href='../index.html'>arch</a>::<wbr><a href='index.html'>x86</a></p><script>window.sidebarCurrent = {name: '_mm_mpsadbw_epu8', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>core</a>::<wbr><a href='../index.html'>arch</a>::<wbr><a href='index.html'>x86</a>::<wbr><a class="fn" href=''>_mm_mpsadbw_epu8</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.27.0'>1.27.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../../../src/core/up/stdsimd/coresimd/x86/sse41.rs.html#1022-1031' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub unsafe fn _mm_mpsadbw_epu8(a: <a class="struct" href="../../../core/arch/x86/struct.__m128i.html" title="struct core::arch::x86::__m128i">__m128i</a>, b: <a class="struct" href="../../../core/arch/x86/struct.__m128i.html" title="struct core::arch::x86::__m128i">__m128i</a>, imm8: i32) -&gt; <a class="struct" href="../../../core/arch/x86/struct.__m128i.html" title="struct core::arch::x86::__m128i">__m128i</a></pre><div class='stability'><div class='stab portability'>This is supported on <strong>x86 and target feature <code>sse4.1</code></strong> only.</div></div><div class='docblock'><p>Subtracts 8-bit unsigned integer values and computes the absolute
values of the differences to the corresponding bits in the destination.
Then sums of the absolute differences are returned according to the bit
fields in the immediate operand.</p>
<p>The following algorithm is performed:</p>

<div class='information'><div class='tooltip ignore'>ⓘ<span class='tooltiptext'>This example is not tested</span></div></div><pre class="rust rust-example-rendered ignore">
<span class="ident">i</span> <span class="op">=</span> <span class="ident">imm8</span>[<span class="number">2</span>] <span class="op">*</span> <span class="number">4</span>
<span class="ident">j</span> <span class="op">=</span> <span class="ident">imm8</span>[<span class="number">1</span>:<span class="number">0</span>] <span class="op">*</span> <span class="number">4</span>
<span class="kw">for</span> <span class="ident">k</span> :<span class="op">=</span> <span class="number">0</span> <span class="ident">to</span> <span class="number">7</span>
    <span class="ident">d0</span> <span class="op">=</span> <span class="ident">abs</span>(<span class="ident">a</span>[<span class="ident">i</span> <span class="op">+</span> <span class="ident">k</span> <span class="op">+</span> <span class="number">0</span>] <span class="op">-</span> <span class="ident">b</span>[<span class="ident">j</span> <span class="op">+</span> <span class="number">0</span>])
    <span class="ident">d1</span> <span class="op">=</span> <span class="ident">abs</span>(<span class="ident">a</span>[<span class="ident">i</span> <span class="op">+</span> <span class="ident">k</span> <span class="op">+</span> <span class="number">1</span>] <span class="op">-</span> <span class="ident">b</span>[<span class="ident">j</span> <span class="op">+</span> <span class="number">1</span>])
    <span class="ident">d2</span> <span class="op">=</span> <span class="ident">abs</span>(<span class="ident">a</span>[<span class="ident">i</span> <span class="op">+</span> <span class="ident">k</span> <span class="op">+</span> <span class="number">2</span>] <span class="op">-</span> <span class="ident">b</span>[<span class="ident">j</span> <span class="op">+</span> <span class="number">2</span>])
    <span class="ident">d3</span> <span class="op">=</span> <span class="ident">abs</span>(<span class="ident">a</span>[<span class="ident">i</span> <span class="op">+</span> <span class="ident">k</span> <span class="op">+</span> <span class="number">3</span>] <span class="op">-</span> <span class="ident">b</span>[<span class="ident">j</span> <span class="op">+</span> <span class="number">3</span>])
    <span class="ident">r</span>[<span class="ident">k</span>] <span class="op">=</span> <span class="ident">d0</span> <span class="op">+</span> <span class="ident">d1</span> <span class="op">+</span> <span class="ident">d2</span> <span class="op">+</span> <span class="ident">d3</span><a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Ai%20%3D%20imm8%5B2%5D%20*%204%0Aj%20%3D%20imm8%5B1%3A0%5D%20*%204%0Afor%20k%20%3A%3D%200%20to%207%0A%20%20%20%20d0%20%3D%20abs(a%5Bi%20%2B%20k%20%2B%200%5D%20-%20b%5Bj%20%2B%200%5D)%0A%20%20%20%20d1%20%3D%20abs(a%5Bi%20%2B%20k%20%2B%201%5D%20-%20b%5Bj%20%2B%201%5D)%0A%20%20%20%20d2%20%3D%20abs(a%5Bi%20%2B%20k%20%2B%202%5D%20-%20b%5Bj%20%2B%202%5D)%0A%20%20%20%20d3%20%3D%20abs(a%5Bi%20%2B%20k%20%2B%203%5D%20-%20b%5Bj%20%2B%203%5D)%0A%20%20%20%20r%5Bk%5D%20%3D%20d0%20%2B%20d1%20%2B%20d2%20%2B%20d3%0A%7D">Run</a></pre>
<p>Arguments:</p>
<ul>
<li><code>a</code> - A 128-bit vector of type <code>__m128i</code>.</li>
<li><code>b</code> - A 128-bit vector of type <code>__m128i</code>.</li>
<li><code>imm8</code> - An 8-bit immediate operand specifying how the absolute
differences are to be calculated
<ul>
<li>Bit <code>[2]</code> specify the offset for operand <code>a</code></li>
<li>Bits <code>[1:0]</code> specify the offset for operand <code>b</code></li>
</ul>
</li>
</ul>
<p>Returns:</p>
<ul>
<li>A <code>__m128i</code> vector containing the sums of the sets of
absolute differences between both operands.</li>
</ul>
<p><a href="https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm_mpsadbw_epu8">Intel's documentation</a></p>
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