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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
#if defined(ARMA_USE_BLAS)
//! \namespace blas namespace for BLAS functions
namespace blas
{
template<typename eT>
inline
void
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)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
#if defined(ARMA_USE_FORTRAN_HIDDEN_ARGS)
{
if( is_float<eT>::value) { typedef float T; arma_fortran(arma_sgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy, 1); }
else if( is_double<eT>::value) { typedef double T; arma_fortran(arma_dgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy, 1); }
else if( is_cx_float<eT>::value) { typedef blas_cxf T; arma_fortran(arma_cgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy, 1); }
else if(is_cx_double<eT>::value) { typedef blas_cxd T; arma_fortran(arma_zgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy, 1); }
}
#else
{
if( is_float<eT>::value) { typedef float T; arma_fortran(arma_sgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy); }
else if( is_double<eT>::value) { typedef double T; arma_fortran(arma_dgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy); }
else if( is_cx_float<eT>::value) { typedef blas_cxf T; arma_fortran(arma_cgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy); }
else if(is_cx_double<eT>::value) { typedef blas_cxd T; arma_fortran(arma_zgemv)(transA, m, n, (const T*)alpha, (const T*)A, ldA, (const T*)x, incx, (const T*)beta, (T*)y, incy); }
}
#endif
}
template<typename eT>
inline
void
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)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
#if defined(ARMA_USE_FORTRAN_HIDDEN_ARGS)
{
if( is_float<eT>::value) { typedef float T; 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, 1, 1); }
else if( is_double<eT>::value) { typedef double T; 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, 1, 1); }
else if( is_cx_float<eT>::value) { typedef blas_cxf T; 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, 1, 1); }
else if(is_cx_double<eT>::value) { typedef blas_cxd T; 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, 1, 1); }
}
#else
{
if( is_float<eT>::value) { typedef float T; 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); }
else if( is_double<eT>::value) { typedef double T; 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); }
else if( is_cx_float<eT>::value) { typedef blas_cxf T; 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); }
else if(is_cx_double<eT>::value) { typedef blas_cxd T; 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); }
}
#endif
}
template<typename eT>
inline
void
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)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
#if defined(ARMA_USE_FORTRAN_HIDDEN_ARGS)
{
if( is_float<eT>::value) { typedef float T; arma_fortran(arma_ssyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC, 1, 1); }
else if(is_double<eT>::value) { typedef double T; arma_fortran(arma_dsyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC, 1, 1); }
}
#else
{
if( is_float<eT>::value) { typedef float T; arma_fortran(arma_ssyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC); }
else if(is_double<eT>::value) { typedef double T; arma_fortran(arma_dsyrk)(uplo, transA, n, k, (const T*)alpha, (const T*)A, ldA, (const T*)beta, (T*)C, ldC); }
}
#endif
}
template<typename T>
inline
void
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)
{
arma_type_check((is_supported_blas_type<T>::value == false));
#if defined(ARMA_USE_FORTRAN_HIDDEN_ARGS)
{
if( is_float<T>::value) { typedef float TT; typedef blas_cxf cx_TT; arma_fortran(arma_cherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC, 1, 1); }
else if(is_double<T>::value) { typedef double TT; typedef blas_cxd cx_TT; arma_fortran(arma_zherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC, 1, 1); }
}
#else
{
if( is_float<T>::value) { typedef float TT; typedef blas_cxf cx_TT; arma_fortran(arma_cherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC); }
else if(is_double<T>::value) { typedef double TT; typedef blas_cxd cx_TT; arma_fortran(arma_zherk)(uplo, transA, n, k, (const TT*)alpha, (const cx_TT*)A, ldA, (const TT*)beta, (cx_TT*)C, ldC); }
}
#endif
}
template<typename eT>
inline
eT
dot(const uword n_elem, const eT* x, const eT* y)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
if(is_float<eT>::value)
{
#if defined(ARMA_BLAS_FLOAT_BUG)
{
if(n_elem == 0) { return eT(0); }
const char trans = 'T';
const blas_int m = blas_int(n_elem);
const blas_int n = 1;
const blas_int inc = 1;
const eT alpha = eT(1);
const eT beta = eT(0);
eT result[2]; // paranoia: using two elements instead of one
blas::gemv(&trans, &m, &n, &alpha, x, &m, y, &inc, &beta, &result[0], &inc);
return result[0];
}
#else
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef float T;
return eT( arma_fortran(arma_sdot)(&n, (const T*)x, &inc, (const T*)y, &inc) );
}
#endif
}
else
if(is_double<eT>::value)
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef double T;
return eT( arma_fortran(arma_ddot)(&n, (const T*)x, &inc, (const T*)y, &inc) );
}
else
if( (is_cx_float<eT>::value) || (is_cx_double<eT>::value) )
{
if(n_elem == 0) { return eT(0); }
// using gemv() workaround due to compatibility issues with cdotu() and zdotu()
const char trans = 'T';
const blas_int m = blas_int(n_elem);
const blas_int n = 1;
const blas_int inc = 1;
const eT alpha = eT(1);
const eT beta = eT(0);
eT result[2]; // paranoia: using two elements instead of one
blas::gemv(&trans, &m, &n, &alpha, x, &m, y, &inc, &beta, &result[0], &inc);
return result[0];
}
return eT(0);
}
template<typename eT>
arma_inline
eT
asum(const uword n_elem, const eT* x)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
if(is_float<eT>::value)
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef float T;
return arma_fortran(arma_sasum)(&n, (const T*)x, &inc);
}
else
if(is_double<eT>::value)
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef double T;
return arma_fortran(arma_dasum)(&n, (const T*)x, &inc);
}
return eT(0);
}
template<typename eT>
arma_inline
eT
nrm2(const uword n_elem, const eT* x)
{
arma_type_check((is_supported_blas_type<eT>::value == false));
if(is_float<eT>::value)
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef float T;
return arma_fortran(arma_snrm2)(&n, (const T*)x, &inc);
}
else
if(is_double<eT>::value)
{
blas_int n = blas_int(n_elem);
blas_int inc = 1;
typedef double T;
return arma_fortran(arma_dnrm2)(&n, (const T*)x, &inc);
}
return eT(0);
}
} // namespace blas
#endif
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