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Implement SDSDOT with DSDOT and avoid allocating buffers in DSDOT.

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Chen-Pang He
2012-09-08 02:06:45 +08:00
parent b0b9b4d6b2
commit 1b61aadcbe
2 changed files with 10 additions and 32 deletions
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14
blas/single.cpp
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@@ -2,7 +2,6 @@
// for linear algebra.
//
// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
@@ -20,15 +19,4 @@
#include "level3_impl.h"
float BLASFUNC(sdsdot)(int* n, float* alpha, float* x, int* incx, float* y, int* incy)
{
float res = *alpha;
if(*n>0) {
if(*incx==1 && *incy==1) res += (vector(x,*n).cwiseProduct(vector(y,*n))).sum();
else if(*incx>0 && *incy>0) res += (vector(x,*n,*incx).cwiseProduct(vector(y,*n,*incy))).sum();
else if(*incx<0 && *incy>0) res += (vector(x,*n,-*incx).reverse().cwiseProduct(vector(y,*n,*incy))).sum();
else if(*incx>0 && *incy<0) res += (vector(x,*n,*incx).cwiseProduct(vector(y,*n,-*incy).reverse())).sum();
else if(*incx<0 && *incy<0) res += (vector(x,*n,-*incx).reverse().cwiseProduct(vector(y,*n,-*incy).reverse())).sum();
}
return res;
}
{ return *alpha + BLASFUNC(dsdot)(n, x, incx, y, incy); }