33 lines
1.5 KiB
C++
33 lines
1.5 KiB
C++
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// 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 BLASFUNC(dsdot)(int* n, float* x, int* incx, float* y, int* incy)
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{
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if(*n<=0) return 0;
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if(*incx==1 && *incy==1) 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) 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) return (make_vector(x,*n,-*incx).reverse().cast<double>().cwiseProduct(make_vector(y,*n,*incy).cast<double>())).sum();
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else if(*incx>0 && *incy<0) return (make_vector(x,*n,*incx).cast<double>().cwiseProduct(make_vector(y,*n,-*incy).reverse().cast<double>())).sum();
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else if(*incx<0 && *incy<0) return (make_vector(x,*n,-*incx).reverse().cast<double>().cwiseProduct(make_vector(y,*n,-*incy).reverse().cast<double>())).sum();
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else return 0;
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}
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