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Diffstat (limited to 'docs/Vectorizers.rst')
| -rw-r--r-- | docs/Vectorizers.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/docs/Vectorizers.rst b/docs/Vectorizers.rst index e49d44c1bb..98f1451d0d 100644 --- a/docs/Vectorizers.rst +++ b/docs/Vectorizers.rst @@ -15,7 +15,7 @@ The Loop Vectorizer Usage ^^^^^^ -LLVM’s Loop Vectorizer is now available and will be useful for many people. +LLVM's Loop Vectorizer is now available and will be useful for many people. It is not enabled by default, but can be enabled through clang using the command line flag: @@ -41,7 +41,7 @@ Loops with unknown trip count The Loop Vectorizer supports loops with an unknown trip count. In the loop below, the iteration ``start`` and ``finish`` points are unknown, and the Loop Vectorizer has a mechanism to vectorize loops that do not start -at zero. In this example, ‘n’ may not be a multiple of the vector width, and +at zero. In this example, 'n' may not be a multiple of the vector width, and the vectorizer has to execute the last few iterations as scalar code. Keeping a scalar copy of the loop increases the code size. @@ -79,7 +79,7 @@ Reductions In this example the ``sum`` variable is used by consecutive iterations of the loop. Normally, this would prevent vectorization, but the vectorizer can -detect that ‘sum’ is a reduction variable. The variable ‘sum’ becomes a vector +detect that 'sum' is a reduction variable. The variable 'sum' becomes a vector of integers, and at the end of the loop the elements of the array are added together to create the correct result. We support a number of different reduction operations, such as addition, multiplication, XOR, AND and OR. |