Changes in directory llvm/docs:
LangRef.html updated: 1.133 -> 1.134
---
Log message:
document the syntax of inline asm
---
Diffs of the changes: (+56 -1)
LangRef.html | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 56 insertions(+), 1 deletion(-)
Index: llvm/docs/LangRef.html
diff -u llvm/docs/LangRef.html:1.133 llvm/docs/LangRef.html:1.134
--- llvm/docs/LangRef.html:1.133 Mon Jan 23 18:37:10 2006
+++ llvm/docs/LangRef.html Wed Jan 25 17:47:57 2006
@@ -55,6 +55,11 @@
<li><a href="#constantexprs">Constant Expressions</a>
</ol>
</li>
+ <li><a href="#othervalues">Other Values</a>
+ <ol>
+ <li><a href="#inlineasm">Inline Assembler Expressions</a>
+ </ol>
+ </li>
<li><a href="#instref">Instruction Reference</a>
<ol>
<li><a href="#terminators">Terminator Instructions</a>
@@ -1145,6 +1150,56 @@
</div>
<!-- ***********************************************************************
-->
+<div class="doc_section"> <a name="othervalues">Other Values</a> </div>
+<!-- ***********************************************************************
-->
+
+<!-- =======================================================================
-->
+<div class="doc_subsection">
+<a name="inlineasm">Inline Assembler Expressions</a>
+</div>
+
+<div class="doc_text">
+
+<p>
+LLVM supports inline assembler expressions (as opposed to <a href="#moduleasm">
+Module-Level Inline Assembly</a>) through the use of a special value. This
+value represents the inline assembler as a string (containing the instructions
+to emit), a list of operand constraints (stored as a string), and a flag that
+indicates whether or not the inline asm expression has side effects. An
example
+inline assembler expression is:
+</p>
+
+<pre>
+ int(int) asm "bswap $0", "=r,r"
+</pre>
+
+<p>
+Inline assembler expressions may <b>only</b> be used as the callee operand of
+a <a href="#i_call"><tt>call</tt> instruction</a>. Thus, typically we have:
+</p>
+
+<pre>
+ %X = call int asm "<a href="#i_bswap">bswap</a> $0", "=r,r"(int %Y)
+</pre>
+
+<p>
+Inline asms with side effects not visible in the constraint list must be marked
+as having side effects. This is done through the use of the
+'<tt>sideeffect</tt>' keyword, like so:
+</p>
+
+<pre>
+ call void asm sideeffect "eieio", ""()
+</pre>
+
+<p>TODO: The format of the asm and constraints string still need to be
+documented here. Constraints on what can be done (e.g. duplication, moving,
etc
+need to be documented).
+</p>
+
+</div>
+
+<!-- ***********************************************************************
-->
<div class="doc_section"> <a name="instref">Instruction Reference</a> </div>
<!-- ***********************************************************************
-->
@@ -3679,7 +3734,7 @@
<a href="mailto:[EMAIL PROTECTED]">Chris Lattner</a><br>
<a href="http://llvm.cs.uiuc.edu";>The LLVM Compiler Infrastructure</a><br>
- Last modified: $Date: 2006/01/24 00:37:10 $
+ Last modified: $Date: 2006/01/25 23:47:57 $
</address>
</body>
</html>
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