Intel® C++ Compiler XE 13.1 User and Reference Guides
Enables or disables a compiler-generated Matrix Multiply (matmul) library call.
Windows: Optimization > Enable Matrix Multiply Library Call
Linux: Optimization > Optimize Matrix Multiplication
OS X: None
IA-32, Intel® 64 architecture
Linux: | -opt-matmul -no-opt-matmul |
OS X: | None |
Windows: | /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.
Options -opt-matmul and /Qopt-matmul tell 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 -parallel (Linux* OS) or /Qparallel (Windows* OS) 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.
None