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44 lines
1.2 KiB
C++
44 lines
1.2 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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// currently used by DSDOT only
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double* cast_vector_to_double(float* x, int n, int incx)
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{
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double* ret = new double[n];
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if(incx<0) vector(ret,n) = vector(x,n,-incx).reverse().cast<double>();
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else vector(ret,n) = vector(x,n, incx).cast<double>();
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return ret;
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}
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double BLASFUNC(dsdot)(int* n, float* px, int* incx, float* py, int* incy)
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{
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if(*n <= 0) return 0;
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double* x = cast_vector_to_double(px, *n, *incx);
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double* y = cast_vector_to_double(py, *n, *incy);
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double res = vector(x,*n).cwiseProduct(vector(y,*n)).sum();
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delete[] x;
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delete[] y;
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return res;
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}
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