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Matrix multiplication is one of the most common numerical operations, especially in the area of dense linear algebra, where it forms the core of many important algorithms, including solvers of linear systems of equations, least square problems, and singular and eigenvalue computations. The STI CELL processor exceeds the capabilities of any other processor available today in terms of peak single precision, floating point performance. In order to fully exploit the potential of the CELL processor for a wide range of numerical algorithms, fast implementation of the matrix multiplication operation is essential. The crutial component is the matrix multiplication kernel crafted for the short vector Single Instruction Multiple Data architecture of the Synergistic Processing Element of the CELL processor. In this paper, single precision matrix multiplication kernels are presented implementing the C= Cï戮驴 A×BToperation and the C= Cï戮驴 A×Boperation for matrices of size 64 ×64 elements. For the latter case, the performance of 25.55 Gflop/s is reported, or 99.80 percent of the peak, using as little as 5.9 KB of storage for code and auxiliary data structures.

Fast and Small Short Vector SIMD Matrix Multiplication Kernels for the Synergistic Processing Element of the CELL Processor