1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
5 // Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
6 //
7 // This Source Code Form is subject to the terms of the Mozilla
8 // Public License v. 2.0. If a copy of the MPL was not distributed
9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
10
11 #define SCALAR double
12 #define SCALAR_SUFFIX d
13 #define SCALAR_SUFFIX_UP "D"
14 #define ISCOMPLEX 0
15
16 #include "level1_impl.h"
17 #include "level1_real_impl.h"
18 #include "level2_impl.h"
19 #include "level2_real_impl.h"
20 #include "level3_impl.h"
21
BLASFUNC(dsdot)22 double BLASFUNC(dsdot)(int* n, float* x, int* incx, float* y, int* incy)
23 {
24 if(*n<=0) return 0;
25
26 if(*incx==1 && *incy==1) return (vector(x,*n).cast<double>().cwiseProduct(vector(y,*n).cast<double>())).sum();
27 else if(*incx>0 && *incy>0) return (vector(x,*n,*incx).cast<double>().cwiseProduct(vector(y,*n,*incy).cast<double>())).sum();
28 else if(*incx<0 && *incy>0) return (vector(x,*n,-*incx).reverse().cast<double>().cwiseProduct(vector(y,*n,*incy).cast<double>())).sum();
29 else if(*incx>0 && *incy<0) return (vector(x,*n,*incx).cast<double>().cwiseProduct(vector(y,*n,-*incy).reverse().cast<double>())).sum();
30 else if(*incx<0 && *incy<0) return (vector(x,*n,-*incx).reverse().cast<double>().cwiseProduct(vector(y,*n,-*incy).reverse().cast<double>())).sum();
31 else return 0;
32 }
33
34