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The wrapping behavior of part_set is not desirable. Adjust the

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documentation to describe the desired behavior.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37036 91177308-0d34-0410-b5e6-96231b3b80d8
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Reid Spencer 2007-05-14 16:50:20 +00:00
parent d6a85b54de
commit c6749c42c3
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@ -4700,15 +4700,15 @@ up to that size.</p>
are replaced with corresponding bits from <tt>%repl</tt>. That is the 0th bit
in <tt>%repl</tt> replaces the <tt>%lo</tt>th bit in <tt>%val</tt> and etc. up
to the <tt>%hi</tt>th bit.
<p>In reverse mode, a similar computation is made except that the bits replaced
wrap around to include both the highest and lowest bits. For example, if a
16 bit value is being replaced then <tt>%lo=8</tt> and <tt>%hi=4</tt> would
cause these bits to be set: <tt>0xFF1F</tt>.</p>
<p>In reverse mode, a similar computation is made except that the bits are
reversed. That is, the <tt>0</tt>th bit in <tt>%repl</tt> replaces the
<tt>%hi</tt> bit in <tt>%val</tt> and etc. down to the <tt>%lo</tt>th bit.
<h5>Examples:</h5>
<pre>
llvm.part.set(0xFFFF, 0, 4, 7) -&gt; 0xFF0F
llvm.part.set(0xFFFF, 0, 7, 4) -&gt; 0x0060
llvm.part.set(0xFFFF, 0, 8, 3) -&gt; 0x00F0
llvm.part.set(0xFFFF, 0, 7, 4) -&gt; 0xFF0F
llvm.part.set(0xFFFF, 1, 7, 4) -&gt; 0xFF8F
llvm.part.set(0xFFFF, F, 8, 3) -&gt; 0xFFE7
llvm.part.set(0xFFFF, 0, 3, 8) -&gt; 0xFE07
</pre>
</div>