28 Numerics library [numerics]

28.9 Basic linear algebra algorithms [linalg]

28.9.15 BLAS 3 algorithms [linalg.algs.blas3]

28.9.15.1 General matrix-matrix product [linalg.algs.blas3.gemm]

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[Note 1: 
These functions correspond to the BLAS function xGEMM[bib].
— end note]
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The following elements apply to all functions in [linalg.algs.blas3.gemm] in addition to function-specific elements.
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Mandates: possibly-multipliable<decltype(A), decltype(B), decltype(C)>() is true.
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Preconditions: multipliable(A, B, C) is true.
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Complexity: .
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template<in-matrix InMat1, in-matrix InMat2, out-matrix OutMat> void matrix_product(InMat1 A, InMat2 B, OutMat C); template<class ExecutionPolicy, in-matrix InMat1, in-matrix InMat2, out-matrix OutMat> void matrix_product(ExecutionPolicy&& exec, InMat1 A, InMat2 B, OutMat C);
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Effects: Computes .
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template<in-matrix InMat1, in-matrix InMat2, in-matrix InMat3, out-matrix OutMat> void matrix_product(InMat1 A, InMat2 B, InMat3 E, OutMat C); template<class ExecutionPolicy, in-matrix InMat1, in-matrix InMat2, in-matrix InMat3, out-matrix OutMat> void matrix_product(ExecutionPolicy&& exec, InMat1 A, InMat2 B, InMat3 E, OutMat C);
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Mandates: possibly-addable<InMat3, InMat3, OutMat>() is true.
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Preconditions: addable(E, E, C) is true.
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Effects: Computes .
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Remarks: C may alias E.