From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Sun, 7 Apr 2024 13:41:34 -0500
Subject: new repository

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+<div class="subsection-level-extent" id="MIPS-SIMD-Architecture-_0028MSA_0029-Support"> <div class="nav-panel"> <p> Next: <a href="other-mips-built-in-functions" accesskey="n" rel="next">Other MIPS Built-in Functions</a>, Previous: <a href="mips-loongson-built-in-functions" accesskey="p" rel="prev">MIPS Loongson Built-in Functions</a>, Up: <a href="target-builtins" accesskey="u" rel="up">Built-in Functions Specific to Particular Target Machines</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div>  <h1 class="subsection" id="MIPS-SIMD-Architecture-_0028MSA_0029-Support-1"><span>6.60.18 MIPS SIMD Architecture (MSA) Support<a class="copiable-link" href="#MIPS-SIMD-Architecture-_0028MSA_0029-Support-1"> ¶</a></span></h1> <p>GCC provides intrinsics to access the SIMD instructions provided by the MSA MIPS SIMD Architecture. The interface is made available by including <code class="code">&lt;msa.h&gt;</code> and using <samp class="option">-mmsa -mhard-float -mfp64 -mnan=2008</samp>. For each <code class="code">__builtin_msa_*</code>, there is a shortened name of the intrinsic, <code class="code">__msa_*</code>. </p> <p>MSA implements 128-bit wide vector registers, operating on 8-, 16-, 32- and 64-bit integer, 16- and 32-bit fixed-point, or 32- and 64-bit floating point data elements. The following vectors typedefs are included in <code class="code">msa.h</code>: </p>
+<ul class="itemize mark-bullet"> <li>
+<code class="code">v16i8</code>, a vector of sixteen signed 8-bit integers; </li>
+<li>
+<code class="code">v16u8</code>, a vector of sixteen unsigned 8-bit integers; </li>
+<li>
+<code class="code">v8i16</code>, a vector of eight signed 16-bit integers; </li>
+<li>
+<code class="code">v8u16</code>, a vector of eight unsigned 16-bit integers; </li>
+<li>
+<code class="code">v4i32</code>, a vector of four signed 32-bit integers; </li>
+<li>
+<code class="code">v4u32</code>, a vector of four unsigned 32-bit integers; </li>
+<li>
+<code class="code">v2i64</code>, a vector of two signed 64-bit integers; </li>
+<li>
+<code class="code">v2u64</code>, a vector of two unsigned 64-bit integers; </li>
+<li>
+<code class="code">v4f32</code>, a vector of four 32-bit floats; </li>
+<li>
+<code class="code">v2f64</code>, a vector of two 64-bit doubles. </li>
+</ul> <p>Instructions and corresponding built-ins may have additional restrictions and/or input/output values manipulated: </p>
+<ul class="itemize mark-bullet"> <li>
+<code class="code">imm0_1</code>, an integer literal in range 0 to 1; </li>
+<li>
+<code class="code">imm0_3</code>, an integer literal in range 0 to 3; </li>
+<li>
+<code class="code">imm0_7</code>, an integer literal in range 0 to 7; </li>
+<li>
+<code class="code">imm0_15</code>, an integer literal in range 0 to 15; </li>
+<li>
+<code class="code">imm0_31</code>, an integer literal in range 0 to 31; </li>
+<li>
+<code class="code">imm0_63</code>, an integer literal in range 0 to 63; </li>
+<li>
+<code class="code">imm0_255</code>, an integer literal in range 0 to 255; </li>
+<li>
+<code class="code">imm_n16_15</code>, an integer literal in range -16 to 15; </li>
+<li>
+<code class="code">imm_n512_511</code>, an integer literal in range -512 to 511; </li>
+<li>
+<code class="code">imm_n1024_1022</code>, an integer literal in range -512 to 511 left shifted by 1 bit, i.e., -1024, -1022, …, 1020, 1022; </li>
+<li>
+<code class="code">imm_n2048_2044</code>, an integer literal in range -512 to 511 left shifted by 2 bits, i.e., -2048, -2044, …, 2040, 2044; </li>
+<li>
+<code class="code">imm_n4096_4088</code>, an integer literal in range -512 to 511 left shifted by 3 bits, i.e., -4096, -4088, …, 4080, 4088; </li>
+<li>
+<code class="code">imm1_4</code>, an integer literal in range 1 to 4; </li>
+<li>
+<code class="code">i32, i64, u32, u64, f32, f64</code>, defined as follows: </li>
+</ul> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">{
+typedef int i32;
+#if __LONG_MAX__ == __LONG_LONG_MAX__
+typedef long i64;
+#else
+typedef long long i64;
+#endif
+
+typedef unsigned int u32;
+#if __LONG_MAX__ == __LONG_LONG_MAX__
+typedef unsigned long u64;
+#else
+typedef unsigned long long u64;
+#endif
+
+typedef double f64;
+typedef float f32;
+}</pre>
+</div> <ul class="mini-toc"> <li><a href="mips-simd-architecture-built-in-functions" accesskey="1">MIPS SIMD Architecture Built-in Functions</a></li> </ul> </div>  <div class="nav-panel"> <p> Next: <a href="other-mips-built-in-functions">Other MIPS Built-in Functions</a>, Previous: <a href="mips-loongson-built-in-functions">MIPS Loongson Built-in Functions</a>, Up: <a href="target-builtins">Built-in Functions Specific to Particular Target Machines</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div><div class="_attribution">
+  <p class="_attribution-p">
+    &copy; Free Software Foundation<br>Licensed under the GNU Free Documentation License, Version 1.3.<br>
+    <a href="https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/MIPS-SIMD-Architecture-_0028MSA_0029-Support.html" class="_attribution-link">https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/MIPS-SIMD-Architecture-_0028MSA_0029-Support.html</a>
+  </p>
+</div>
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