Enables and disables the generation of NEON vector instructions directly from C or C++ code.
The default is --no_vectorize.
The following options must be specified for loops to vectorize:
Target processor must have NEON capability.
Type of optimization to reduce execution time.
Level of optimization. One of the following must be used:
-O2 High optimization. This is the default.
-O3 Maximum optimization.
This example invokes automatic vectorization on the Cortex-A8 processor.
armcc --vectorize --cpu=Cortex-A8 -O3 -Otime -c file.c
Using the command-line options -O3 and -Otime ensures that the code achieves significant performance benefits in addition to those of vectorization.
You can also compile with -O2 -Otime. However, this does not give the maximum code performance.