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Diffstat (limited to 'docs/LangRef.html')
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1 files changed, 35 insertions, 28 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index e6cd794..8b05f11 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -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 <address>) - call ubyte (ushort address)* %llvm.readport(ushort <address>) - call short (ushort address)* %llvm.readport(ushort <address>) - call ushort (ushort address)* %llvm.readport(ushort <address>) - call int (ushort address)* %llvm.readport(ushort <address>) - call uint (ushort address)* %llvm.readport(ushort <address>) + call <integer type> (<integer type>)* %llvm.readport (<integer type> <address>) </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 <address>, sbyte <value>) - call void (ushort address, ubyte value)* %llvm.writeport(ushort <address>, ubyte <value>) - call void (ushort address, short value)* %llvm.writeport(ushort <address>, short <value>) - call void (ushort address, ushort value)* %llvm.writeport(ushort <address>, ushort <value>) - call void (ushort address, int value)* %llvm.writeport(ushort <address>, int <value>) - call void (ushort address, uint value)* %llvm.writeport(ushort <address>, uint <value>) + call void (<integer type>, <integer type>)* %llvm.writeport (<integer type> <value>, <integer type> <address>) </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> |