[llvm-commits] [llvm] r171094 - /llvm/trunk/docs/Vectorizers.rst

[Nadav Rotem]

Author: nadav
Date: Wed Dec 26 00:03:35 2012
New Revision: 171094

URL: http://llvm.org/viewvc/llvm-project?rev=171094&view=rev
Log:
Doc: add fmuladd to the list of vectorizeable functions. Thanks hfinkel.

Modified:
    llvm/trunk/docs/Vectorizers.rst

Modified: llvm/trunk/docs/Vectorizers.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/Vectorizers.rst?rev=171094&r1=171093&r2=171094&view=diff
==============================================================================
--- llvm/trunk/docs/Vectorizers.rst (original)
+++ llvm/trunk/docs/Vectorizers.rst Wed Dec 26 00:03:35 2012
@@ -183,6 +183,18 @@
       A[i] += 4 * B[i];
   }
 
+
+Vectorization of Special Idioms
+-------------------------------
+
+The Loop Vectorizer can detect and vectorize  
+
+.. code-block:: c++
+
+  for ( k=1 ; k<n ; k++ ) {
+    x[k] = x[k-1] + y[k];
+  }
+
 Vectorization of function calls
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -200,6 +212,8 @@
 +-----+-----+---------+
 |fma  |trunc|nearbyint|
 +-----+-----+---------+
+|     |     | fmuladd |
++-----+-----+---------+
 
 Performance
 -----------