[llvm-commits] [llvm] r60831 - /llvm/trunk/docs/LangRef.html

[Mon P Wang]

Author: wangmp
Date: Wed Dec 10 02:55:09 2008
New Revision: 60831

URL: http://llvm.org/viewvc/llvm-project?rev=60831&view=rev
Log:
Added a little more information that vector shifts require vector shift amount.

Modified:
    llvm/trunk/docs/LangRef.html

Modified: llvm/trunk/docs/LangRef.html
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/LangRef.html?rev=60831&r1=60830&r2=60831&view=diff

==============================================================================
--- llvm/trunk/docs/LangRef.html (original)
+++ llvm/trunk/docs/LangRef.html Wed Dec 10 02:55:09 2008
@@ -2584,7 +2584,9 @@
 
 <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>
   <result> = shl i32 4, %var   <i>; yields {i32}: 4 << %var</i>
@@ -2616,7 +2618,9 @@
 <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 @@
 <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>