209 lines
12 KiB
HTML
209 lines
12 KiB
HTML
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<title>std::experimental::simd</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_simd_simd skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::experimental::</span>simd</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a>‎ | <a href="cpp-experimental-simd.html">simd</a></span></div>
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<div>定义于头文件 <code><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/header/experimental/simd&action=edit&redlink=1" class="new" title="cpp/header/experimental/simd（页面不存在）"><experimental/simd></a></code></div>
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<tr class="t-dcl t-since-parallelism_ts_2">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> T, <span class="kw1">class</span> Abi <span class="sy1">=</span> simd_abi<span class="sy4">::</span><span class="me2">compatible</span><span class="sy1"><</span>T<span class="sy1">></span> <span class="sy1">></span><br />
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<span class="kw1">class</span> simd<span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-parallelism-ts-2 t-mark-ts">(并行 TS v2)</span></td>
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<p>类模板 simd 是数据并行类型。给定的 simd 实例化的宽度是常量表达式，由模板形参确定。</p>
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<p>ABI 标签是 simd_abi 命名空间中的类型，指示数据并行类型对象的大小和二进制表示。</p>
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<h3><span class="mw-headline" id=".E6.A8.A1.E6.9D.BF.E5.BD.A2.E5.8F.82">模板形参</span></h3>
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<table class="t-par-begin">
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<td>T</td>
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<td>-</td>
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<td>元素类型</td>
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<tr class="t-par">
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<td>Abi</td>
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<td>-</td>
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<td>用于确定元素数和存储的标签类型</td>
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<h3><span class="mw-headline" id=".E8.BE.85.E5.8A.A9.E5.88.AB.E5.90.8D.E6.A8.A1.E7.89.88">辅助别名模版</span></h3>
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<table class="t-dcl-begin">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> T, <span class="kw4">int</span> N <span class="sy1">></span><br />
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<span class="kw1">using</span> fixed_size_simd <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">simd</span><span class="sy1"><</span>T, std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">simd_abi</span><span class="sy4">::</span><span class="me2">fixed_size</span><span class="sy1"><</span>N<span class="sy1">>></span><span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> T, <span class="kw4">int</span> N <span class="sy1">></span><br />
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<span class="kw1">using</span> native_simd <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">simd</span><span class="sy1"><</span>T, std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">simd_abi</span><span class="sy4">::</span><span class="me2">native</span><span class="sy1">></span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td class="t-dcl-nopad"></td>
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<td></td>
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<td></td>
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<td></td>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">成员类型</span></h3>
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<table class="t-dsc-begin">
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<td>成员类型</td>
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<td>定义</td>
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<tr class="t-dsc">
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<td><code>value_type</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">T</span></span></td>
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<tr class="t-dsc">
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<td><code>reference</code></td>
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<td>实现定义</td>
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<tr class="t-dsc">
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<td><code>mask_type</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">simd_mask<span class="sy1"><</span>T, Abi<span class="sy1">></span></span></span></td>
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<tr class="t-dsc">
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<td><code>abi_type</code></td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">Abi</span></span></td>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</span></h3>
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<table class="t-dsc-begin">
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/simd&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/simd（页面不存在）"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</td>
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<td>构造 <code>simd</code> 对象<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/copy_from&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/copy from（页面不存在）"><span class="t-lines"><span>copy_from</span></span></a></div>
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</div>
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</td>
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<td>从地址加载<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/copy_to&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/copy to（页面不存在）"><span class="t-lines"><span>copy_to</span></span></a></div>
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</div>
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</td>
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<td>存储到地址<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_at&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator at（页面不存在）"><span class="t-lines"><span>operator[]</span></span></a></div>
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</td>
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<td>访问指定的元素<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_mem_arith&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator mem arith（页面不存在）"><span class="t-lines"><span>operator++</span> <span>operator--</span></span></a></div>
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</div>
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</td>
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<td>逐元素自增与自减<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_mem_arith2&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator mem arith2（页面不存在）"><span class="t-lines"><span>operator!</span> <span>operator~</span> <span>operator+</span> <span>operator-</span></span></a></div>
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</div>
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</td>
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<td>逐元素一元运算符<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/size&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/size（页面不存在）"><span class="t-lines"><span>size</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[静态]</span></span></span></div>
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</div>
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</td>
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<td>返回元素数<br />
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<span class="t-mark">(公开静态成员函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">非成员函数</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_arith&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator arith（页面不存在）"><span class="t-lines"><span>operator+</span> <span>operator-</span> <span>operator*</span> <span>operator/</span> <span>operator%</span> <span>operator&</span> <span>operator|</span> <span>operator^</span> <span>operator<<</span> <span>operator>></span> <span>operator<<</span> <span>operator>></span></span></a></div>
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</div>
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</td>
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<td>逐元素二元运算符<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_compound&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator compound（页面不存在）"><span class="t-lines"><span>operator+=</span> <span>operator-=</span> <span>operator*=</span> <span>operator/=</span> <span>operator%=</span> <span>operator&=</span> <span>operator|=</span> <span>operator^=</span> <span>operator<<=</span> <span>operator>>=</span> <span>operator<<=</span> <span>operator>>=</span></span></a></div>
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</div>
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</td>
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<td>逐元素复合赋值运算符<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/experimental/simd/simd/operator_cmp&action=edit&redlink=1" class="new" title="cpp/experimental/simd/simd/operator cmp（页面不存在）"><span class="t-lines"><span>operator==</span> <span>operator!=</span> <span>operator>=</span> <span>operator<=</span> <span>operator></span> <span>operator<</span></span></a></div>
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</div>
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</td>
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<td>逐元素关系运算符<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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</div>
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<div class="visualClear"></div>
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