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remove the read/write port/io intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26479 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner
2006-03-03 00:19:58 +00:00
parent 472c0ebea4
commit 41edaa0529
11 changed files with 12 additions and 387 deletions
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@@ -143,13 +143,6 @@
<li><a href="#i_readcyclecounter"><tt>llvm.readcyclecounter</tt>' Intrinsic</a></li>
</ol>
</li>
<li><a href="#int_os">Operating System Intrinsics</a>
<ol>
<li><a href="#i_readport">'<tt>llvm.readport</tt>' Intrinsic</a></li>
<li><a href="#i_writeport">'<tt>llvm.writeport</tt>' Intrinsic</a></li>
<li><a href="#i_readio">'<tt>llvm.readio</tt>' Intrinsic</a></li>
<li><a href="#i_writeio">'<tt>llvm.writeio</tt>' Intrinsic</a></li>
</ol>
<li><a href="#int_libc">Standard C Library Intrinsics</a>
<ol>
<li><a href="#i_memcpy">'<tt>llvm.memcpy.*</tt>' Intrinsic</a></li>
@@ -3266,199 +3259,6 @@ system wide value. On backends without support, this is lowered to a constant 0
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="int_os">Operating System Intrinsics</a>
</div>
<div class="doc_text">
<p>
These intrinsics are provided by LLVM to support the implementation of
operating system level code.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_readport">'<tt>llvm.readport</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
declare &lt;integer type&gt; %llvm.readport (&lt;integer type&gt; &lt;address&gt;)
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.readport</tt>' intrinsic reads data from the specified hardware
I/O port.
</p>
<h5>Arguments:</h5>
<p>
The argument to this intrinsic indicates the hardware I/O address from which
to read the data. The address is in the hardware I/O address namespace (as
opposed to being a memory location for memory mapped I/O).
</p>
<h5>Semantics:</h5>
<p>
The '<tt>llvm.readport</tt>' intrinsic reads data from the hardware I/O port
specified by <i>address</i> and returns the value. The address and return
value must be integers, but the size is dependent upon the platform upon which
the program is code generated. For example, on x86, the address must be an
unsigned 16-bit value, and the return value must be 8, 16, or 32 bits.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_writeport">'<tt>llvm.writeport</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
call void (&lt;integer type&gt;, &lt;integer type&gt;)*
%llvm.writeport (&lt;integer type&gt; &lt;value&gt;,
&lt;integer type&gt; &lt;address&gt;)
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.writeport</tt>' intrinsic writes data to the specified hardware
I/O port.
</p>
<h5>Arguments:</h5>
<p>
The first argument is the value to write to the I/O port.
</p>
<p>
The second argument indicates the hardware I/O address to which data should be
written. The address is in the hardware I/O address namespace (as opposed to
being a memory location for memory mapped I/O).
</p>
<h5>Semantics:</h5>
<p>
The '<tt>llvm.writeport</tt>' intrinsic writes <i>value</i> to the I/O port
specified by <i>address</i>. The address and value must be integers, but the
size is dependent upon the platform upon which the program is code generated.
For example, on x86, the address must be an unsigned 16-bit value, and the
value written must be 8, 16, or 32 bits in length.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_readio">'<tt>llvm.readio</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
declare &lt;result&gt; %llvm.readio (&lt;ty&gt; * &lt;pointer&gt;)
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.readio</tt>' intrinsic reads data from a memory mapped I/O
address.
</p>
<h5>Arguments:</h5>
<p>
The argument to this intrinsic is a pointer indicating the memory address from
which to read the data. The data must be a
<a href="#t_firstclass">first class</a> type.
</p>
<h5>Semantics:</h5>
<p>
The '<tt>llvm.readio</tt>' intrinsic reads data from a memory mapped I/O
location specified by <i>pointer</i> and returns the value. The argument must
be a pointer, and the return value must be a
<a href="#t_firstclass">first class</a> type. However, certain architectures
may not support I/O on all first class types. For example, 32-bit processors
may only support I/O on data types that are 32 bits or less.
</p>
<p>
This intrinsic enforces an in-order memory model for llvm.readio and
llvm.writeio calls on machines that use dynamic scheduling. Dynamically
scheduled processors may execute loads and stores out of order, re-ordering at
run time accesses to memory mapped I/O registers. Using these intrinsics
ensures that accesses to memory mapped I/O registers occur in program order.
</p>
</div>
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection">
<a name="i_writeio">'<tt>llvm.writeio</tt>' Intrinsic</a>
</div>
<div class="doc_text">
<h5>Syntax:</h5>
<pre>
declare void %llvm.writeio (&lt;ty1&gt; &lt;value&gt;, &lt;ty2&gt; * &lt;pointer&gt;)
</pre>
<h5>Overview:</h5>
<p>
The '<tt>llvm.writeio</tt>' intrinsic writes data to the specified memory
mapped I/O address.
</p>
<h5>Arguments:</h5>
<p>
The first argument is the value to write to the memory mapped I/O location.
The second argument is a pointer indicating the memory address to which the
data should be written.
</p>
<h5>Semantics:</h5>
<p>
The '<tt>llvm.writeio</tt>' intrinsic writes <i>value</i> to the memory mapped
I/O address specified by <i>pointer</i>. The value must be a
<a href="#t_firstclass">first class</a> type. However, certain architectures
may not support I/O on all first class types. For example, 32-bit processors
may only support I/O on data types that are 32 bits or less.
</p>
<p>
This intrinsic enforces an in-order memory model for llvm.readio and
llvm.writeio calls on machines that use dynamic scheduling. Dynamically
scheduled processors may execute loads and stores out of order, re-ordering at
run time accesses to memory mapped I/O registers. Using these intrinsics
ensures that accesses to memory mapped I/O registers occur in program order.
</p>
</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
<a name="int_libc">Standard C Library Intrinsics</a>