The General Matrix Multiply (GEMM) is a subroutine in the Basic Linear Algebra Subprograms (BLAS) which performs matrix multiplication, that is the multiplication of two matrices. This includes:
- SGEMM for single precision,
- DGEMM for double-precision,
- CGEMM for complex single precision, and
- ZGEMM for complex double precision.
GEMM is often tuned by High Performance Computing vendors to run as fast as possible, because it is the building block for so many other routines. It is also the most important routine in the LINPACK benchmark. For this reason, implementations of fast BLAS library typically focus first on GEMM performance.
Read more about General Matrix Multiply: Operation, Optimization
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