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Added a little more information that vector shifts require vector shift amount.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60831 91177308-0d34-0410-b5e6-96231b3b80d8
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Mon P Wang 2008-12-10 08:55:09 +00:00
parent bae527d949
commit 01f8d09dd3
1 changed files with 9 additions and 4 deletions
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docs/LangRef.html
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@ -2584,7 +2584,9 @@ type. '<tt>op2</tt>' is treated as an unsigned value.</p>
<p>The value produced is <tt>op1</tt> * 2<sup><tt>op2</tt></sup> mod 2<sup>n</sup>,
where n is the width of the result. If <tt>op2</tt> is (statically or dynamically) negative or
equal to or larger than the number of bits in <tt>op1</tt>, the result is undefined.</p>
equal to or larger than the number of bits in <tt>op1</tt>, the result is undefined.
If the arguments are vectors, each vector element of <tt>op1</tt> is shifted by the
corresponding shift amount in <tt>op2</tt>.</p>
<h5>Example:</h5><pre>
&lt;result&gt; = shl i32 4, %var <i>; yields {i32}: 4 &lt;&lt; %var</i>
@ -2616,7 +2618,9 @@ type. '<tt>op2</tt>' is treated as an unsigned value.</p>
<p>This instruction always performs a logical shift right operation. The most
significant bits of the result will be filled with zero bits after the
shift. If <tt>op2</tt> is (statically or dynamically) equal to or larger than
the number of bits in <tt>op1</tt>, the result is undefined.</p>
the number of bits in <tt>op1</tt>, the result is undefined. If the arguments are
vectors, each vector element of <tt>op1</tt> is shifted by the corresponding shift
amount in <tt>op2</tt>.</p>
<h5>Example:</h5>
<pre>
@ -2651,8 +2655,9 @@ type. '<tt>op2</tt>' is treated as an unsigned value.</p>
<p>This instruction always performs an arithmetic shift right operation,
The most significant bits of the result will be filled with the sign bit
of <tt>op1</tt>. If <tt>op2</tt> is (statically or dynamically) equal to or
larger than the number of bits in <tt>op1</tt>, the result is undefined.
</p>
larger than the number of bits in <tt>op1</tt>, the result is undefined. If the
arguments are vectors, each vector element of <tt>op1</tt> is shifted by the
corresponding shift amount in <tt>op2</tt>.</p>
<h5>Example:</h5>
<pre>