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Modified the prototypes of the llvm.readport and llvm.writeport intrinsics

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so that they do not specify specific integer sizes (as those are
constrained by the code generator, not the intrinsic itself).

Also put these intrinsics into their own "Operating System" section.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12789 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
John Criswell 2004-04-09 16:43:20 +00:00
parent cfd3baccce
commit 7123e27894
1 changed files with 35 additions and 28 deletions
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docs/LangRef.html
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@ -101,10 +101,13 @@
<ol>
<li><a href="#i_returnaddress">'<tt>llvm.returnaddress</tt>' Intrinsic</a></li>
<li><a href="#i_frameaddress">'<tt>llvm.frameaddress</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>
</ol>
</li>
<li><a href="#int_libc">Standard C Library Intrinsics</a>
<ol>
<li><a href="#i_memcpy">'<tt>llvm.memcpy</tt>' Intrinsic</a></li>
@ -1998,6 +2001,18 @@ source-language caller.
</p>
</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>
@ -2007,36 +2022,32 @@ source-language caller.
<h5>Syntax:</h5>
<pre>
call sbyte (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call ubyte (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call short (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call ushort (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call int (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call uint (ushort address)* %llvm.readport(ushort &lt;address&gt;)
call &lt;integer type&gt; (&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 I/O port.
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 I/O address from which to read
the data. The address is in the I/O address namespace; it is not a memory
location.
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 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 a
ushort, and the return value must be 8, 16, or 32 bits.
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>
@ -2050,26 +2061,22 @@ ushort, and the return value must be 8, 16, or 32 bits.
<h5>Syntax:</h5>
<pre>
call void (ushort address, sbyte value)* %llvm.writeport(ushort &lt;address&gt;, sbyte &lt;value&gt;)
call void (ushort address, ubyte value)* %llvm.writeport(ushort &lt;address&gt;, ubyte &lt;value&gt;)
call void (ushort address, short value)* %llvm.writeport(ushort &lt;address&gt;, short &lt;value&gt;)
call void (ushort address, ushort value)* %llvm.writeport(ushort &lt;address&gt;, ushort &lt;value&gt;)
call void (ushort address, int value)* %llvm.writeport(ushort &lt;address&gt;, int &lt;value&gt;)
call void (ushort address, uint value)* %llvm.writeport(ushort &lt;address&gt;, uint &lt;value&gt;)
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 I/O port.
The '<tt>llvm.writeport</tt>' intrinsic writes data to the specified hardware
I/O port.
</p>
<h5>Arguments:</h5>
<p>
The first argument to this intrinsic indicates the I/O address to which data
should be written. The address is in the I/O address namespace; it is not a
memory location.
The first argument to this intrinsic 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>
<p>
@ -2082,8 +2089,8 @@ The second argument is the value to write to the I/O port.
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 a ushort, and the value written must
be 8, 16, or 32 bits in length.
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>