284 lines
7.9 KiB
C++
284 lines
7.9 KiB
C++
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// Copyright (C) 2008-2015 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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#ifdef ARMA_USE_BLAS
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//! \namespace blas namespace for BLAS functions
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namespace blas
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{
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template<typename eT>
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inline
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void
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gemv(const char* transA, const blas_int* m, const blas_int* n, const eT* alpha, const eT* A, const blas_int* ldA, const eT* x, const blas_int* incx, const eT* beta, eT* y, const blas_int* incy)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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typedef float T;
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arma_fortran(arma_sgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy);
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}
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else
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if(is_double<eT>::value)
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{
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typedef double T;
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arma_fortran(arma_dgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy);
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}
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else
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if(is_supported_complex_float<eT>::value)
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{
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typedef std::complex<float> T;
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arma_fortran(arma_cgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy);
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}
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else
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if(is_supported_complex_double<eT>::value)
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{
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typedef std::complex<double> T;
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arma_fortran(arma_zgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy);
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}
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}
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template<typename eT>
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inline
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void
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gemm(const char* transA, const char* transB, const blas_int* m, const blas_int* n, const blas_int* k, const eT* alpha, const eT* A, const blas_int* ldA, const eT* B, const blas_int* ldB, const eT* beta, eT* C, const blas_int* ldC)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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typedef float T;
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arma_fortran(arma_sgemm)(transA, transB, m, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)B, ldB, (const T*)beta, (T*)C, ldC);
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}
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else
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if(is_double<eT>::value)
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{
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typedef double T;
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arma_fortran(arma_dgemm)(transA, transB, m, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)B, ldB, (const T*)beta, (T*)C, ldC);
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}
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else
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if(is_supported_complex_float<eT>::value)
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{
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typedef std::complex<float> T;
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arma_fortran(arma_cgemm)(transA, transB, m, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)B, ldB, (const T*)beta, (T*)C, ldC);
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}
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else
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if(is_supported_complex_double<eT>::value)
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{
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typedef std::complex<double> T;
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arma_fortran(arma_zgemm)(transA, transB, m, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)B, ldB, (const T*)beta, (T*)C, ldC);
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}
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}
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template<typename eT>
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inline
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void
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syrk(const char* uplo, const char* transA, const blas_int* n, const blas_int* k, const eT* alpha, const eT* A, const blas_int* ldA, const eT* beta, eT* C, const blas_int* ldC)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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typedef float T;
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arma_fortran(arma_ssyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC);
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}
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else
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if(is_double<eT>::value)
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{
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typedef double T;
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arma_fortran(arma_dsyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC);
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}
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}
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template<typename T>
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inline
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void
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herk(const char* uplo, const char* transA, const blas_int* n, const blas_int* k, const T* alpha, const std::complex<T>* A, const blas_int* ldA, const T* beta, std::complex<T>* C, const blas_int* ldC)
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{
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arma_type_check((is_supported_blas_type<T>::value == false));
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if(is_float<T>::value)
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{
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typedef float TT;
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typedef std::complex<float> cx_TT;
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arma_fortran(arma_cherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC);
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}
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else
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if(is_double<T>::value)
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{
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typedef double TT;
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typedef std::complex<double> cx_TT;
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arma_fortran(arma_zherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC);
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}
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}
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template<typename eT>
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inline
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eT
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dot(const uword n_elem, const eT* x, const eT* y)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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#if defined(ARMA_BLAS_SDOT_BUG)
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{
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if(n_elem == 0) { return eT(0); }
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const char trans = 'T';
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const blas_int m = blas_int(n_elem);
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const blas_int n = 1;
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//const blas_int lda = (n_elem > 0) ? blas_int(n_elem) : blas_int(1);
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const blas_int inc = 1;
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const eT alpha = eT(1);
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const eT beta = eT(0);
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eT result[2]; // paranoia: using two elements instead of one
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//blas::gemv(&trans, &m, &n, &alpha, x, &lda, y, &inc, &beta, &result[0], &inc);
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blas::gemv(&trans, &m, &n, &alpha, x, &m, y, &inc, &beta, &result[0], &inc);
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return result[0];
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}
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#else
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef float T;
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return eT( arma_fortran(arma_sdot)(&n, (const T*)x, &inc, (const T*)y, &inc) );
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}
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#endif
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}
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else
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if(is_double<eT>::value)
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef double T;
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return eT( arma_fortran(arma_ddot)(&n, (const T*)x, &inc, (const T*)y, &inc) );
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}
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else
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if( (is_supported_complex_float<eT>::value) || (is_supported_complex_double<eT>::value) )
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{
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if(n_elem == 0) { return eT(0); }
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// using gemv() workaround due to compatibility issues with cdotu() and zdotu()
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const char trans = 'T';
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const blas_int m = blas_int(n_elem);
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const blas_int n = 1;
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//const blas_int lda = (n_elem > 0) ? blas_int(n_elem) : blas_int(1);
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const blas_int inc = 1;
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const eT alpha = eT(1);
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const eT beta = eT(0);
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eT result[2]; // paranoia: using two elements instead of one
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//blas::gemv(&trans, &m, &n, &alpha, x, &lda, y, &inc, &beta, &result[0], &inc);
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blas::gemv(&trans, &m, &n, &alpha, x, &m, y, &inc, &beta, &result[0], &inc);
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return result[0];
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}
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else
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{
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return eT(0);
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}
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}
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template<typename eT>
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arma_inline
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eT
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asum(const uword n_elem, const eT* x)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef float T;
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return arma_fortran(arma_sasum)(&n, (const T*)x, &inc);
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}
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else
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if(is_double<eT>::value)
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef double T;
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return arma_fortran(arma_dasum)(&n, (const T*)x, &inc);
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}
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else
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{
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return eT(0);
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}
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}
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template<typename eT>
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arma_inline
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eT
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nrm2(const uword n_elem, const eT* x)
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{
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arma_type_check((is_supported_blas_type<eT>::value == false));
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if(is_float<eT>::value)
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef float T;
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return arma_fortran(arma_snrm2)(&n, (const T*)x, &inc);
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}
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else
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if(is_double<eT>::value)
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{
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blas_int n = blas_int(n_elem);
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blas_int inc = 1;
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typedef double T;
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return arma_fortran(arma_dnrm2)(&n, (const T*)x, &inc);
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}
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else
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{
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return eT(0);
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}
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}
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}
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#endif
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