User and Reference Guide for the Intel® Fortran Compiler 14.0
Enables or disables a compiler-generated Matrix Multiply (matmul) library call.
Not available on Intel® 64 architecture targeting Intel® MIC Architecture
Linux OS: | -opt-matmul -no-opt-matmul |
OS X: | None |
Windows OS: | /Qopt-matmul /Qopt-matmul- |
None
-no-opt-matmul |
The matmul library call optimization does not occur unless this option is enabled or certain other compiler options are specified (see below). |
This option enables or disables a compiler-generated Matrix Multiply (MATMUL) library call.
Option [Q]opt-matmul tells the compiler to identify matrix multiplication loop nests (if any) and replace them with a matmul library call for improved performance. The resulting executable may get additional performance gain on Intel® microprocessors than on non-Intel microprocessors.
This option is enabled by default if options O3 and [Q]parallel are specified. To disable this optimization, specify -no-opt-matmul or /Qopt-matmul-.
This option has no effect unless option O2 or higher is set.
Many routines in the MATMUL library are more highly optimized for Intel® microprocessors than for non-Intel microprocessors.
Windows: Optimization > Enable Matrix Multiply Library Call
Linux: None
OS X: None
None