44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
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// Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#define SCALAR double
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#define SCALAR_SUFFIX d
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#define SCALAR_SUFFIX_UP "D"
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#define ISCOMPLEX 0
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#include "level1_impl.h"
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#include "level1_real_impl.h"
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#include "level2_impl.h"
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#include "level2_real_impl.h"
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#include "level3_impl.h"
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double EIGEN_BLAS_FUNC(sdot)(int* n, float* x, int* incx, float* y, int* incy) {
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if (*n <= 0) return 0;
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if (*incx == 1 && *incy == 1)
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return (make_vector(x, *n).cast<double>().cwiseProduct(make_vector(y, *n).cast<double>())).sum();
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else if (*incx > 0 && *incy > 0)
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return (make_vector(x, *n, *incx).cast<double>().cwiseProduct(make_vector(y, *n, *incy).cast<double>())).sum();
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else if (*incx < 0 && *incy > 0)
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return (make_vector(x, *n, -*incx).reverse().cast<double>().cwiseProduct(make_vector(y, *n, *incy).cast<double>()))
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.sum();
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else if (*incx > 0 && *incy < 0)
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return (make_vector(x, *n, *incx).cast<double>().cwiseProduct(make_vector(y, *n, -*incy).reverse().cast<double>()))
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.sum();
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else if (*incx < 0 && *incy < 0)
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return (make_vector(x, *n, -*incx)
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.reverse()
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.cast<double>()
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.cwiseProduct(make_vector(y, *n, -*incy).reverse().cast<double>()))
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.sum();
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else
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return 0;
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}
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