98 lines
6.4 KiB
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98 lines
6.4 KiB
HTML
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<div class="subsubsection-level-extent" id="Atomic-Memory-Access-Instructions">
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Next: <a href="Tagging-and-Untagging-Instructions.html" accesskey="n" rel="next">Tagging and Untagging Instructions</a>, Previous: <a href="Memory-Access-Instructions.html" accesskey="p" rel="prev">Memory Access Instructions</a>, Up: <a href="Instruction-Set.html" accesskey="u" rel="up">Instruction Set</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<h4 class="subsubsection" id="Atomic-Memory-Access-Instructions-1"><span>9.3.7.10 Atomic Memory Access Instructions<a class="copiable-link" href="#Atomic-Memory-Access-Instructions-1"> ¶</a></span></h4>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-current_002dthread-2"><span class="category-def">Instruction: </span><span><strong class="def-name">current-thread</strong> <code class="def-code-arguments">s24:<var class="var">dst</var></code><a class="copiable-link" href="#index-current_002dthread-2"> ¶</a></span></dt>
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<dd><p>Write the current thread into <var class="var">dst</var>.
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</p></dd></dl>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-atomic_002dscm_002dref_002fimmediate"><span class="category-def">Instruction: </span><span><strong class="def-name">atomic-scm-ref/immediate</strong> <code class="def-code-arguments">s8:<var class="var">dst</var> s8:<var class="var">obj</var> c8:<var class="var">idx</var></code><a class="copiable-link" href="#index-atomic_002dscm_002dref_002fimmediate"> ¶</a></span></dt>
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<dd><p>Atomically load the <code class="code">SCM</code> object at word offset <var class="var">idx</var> from
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local <var class="var">obj</var>, using the sequential consistency memory model. Store
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the result to <var class="var">dst</var>.
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</p></dd></dl>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-atomic_002dscm_002dset_0021_002fimmediate"><span class="category-def">Instruction: </span><span><strong class="def-name">atomic-scm-set!/immediate</strong> <code class="def-code-arguments">s8:<var class="var">obj</var> c8:<var class="var">idx</var> s8:<var class="var">val</var></code><a class="copiable-link" href="#index-atomic_002dscm_002dset_0021_002fimmediate"> ¶</a></span></dt>
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<dd><p>Atomically set the <code class="code">SCM</code> object at word offset <var class="var">idx</var> from local
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<var class="var">obj</var> to <var class="var">val</var>, using the sequential consistency memory model.
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</p></dd></dl>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-atomic_002dscm_002dswap_0021_002fimmediate"><span class="category-def">Instruction: </span><span><strong class="def-name">atomic-scm-swap!/immediate</strong> <code class="def-code-arguments">s24:<var class="var">dst</var> x8:<var class="var">_</var> s24:<var class="var">obj</var> c8:<var class="var">idx</var> s24:<var class="var">val</var></code><a class="copiable-link" href="#index-atomic_002dscm_002dswap_0021_002fimmediate"> ¶</a></span></dt>
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<dd><p>Atomically swap the <code class="code">SCM</code> value stored in object <var class="var">obj</var> at word
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offset <var class="var">idx</var> with <var class="var">val</var>, using the sequentially consistent
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memory model. Store the previous value to <var class="var">dst</var>.
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</p></dd></dl>
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<dl class="first-deftypefn">
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<dt class="deftypefn" id="index-atomic_002dscm_002dcompare_002dand_002dswap_0021_002fimmediate"><span class="category-def">Instruction: </span><span><strong class="def-name">atomic-scm-compare-and-swap!/immediate</strong> <code class="def-code-arguments">s24:<var class="var">dst</var> x8:<var class="var">_</var> s24:<var class="var">obj</var> c8:<var class="var">idx</var> s24:<var class="var">expected</var> x8:<var class="var">_</var> s24:<var class="var">desired</var></code><a class="copiable-link" href="#index-atomic_002dscm_002dcompare_002dand_002dswap_0021_002fimmediate"> ¶</a></span></dt>
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<dd><p>Atomically swap the <code class="code">SCM</code> value stored in object <var class="var">obj</var> at word
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offset <var class="var">idx</var> with <var class="var">desired</var>, if and only if the value that was
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there was <var class="var">expected</var>, using the sequentially consistent memory
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model. Store the value that was previously at <var class="var">idx</var> from <var class="var">obj</var>
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in <var class="var">dst</var>.
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</p></dd></dl>
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