added optimized sdot- and dsdot-kernel, written in C

diff --git a/kernel/generic/dot.c b/kernel/generic/dot.c
new file mode 100644 (file)
index 0000000..bc07bc7
--- /dev/null
+++ b/kernel/generic/dot.c
@@ -0,0 +1,104 @@
+/***************************************************************************
+Copyright (c) 2014, The OpenBLAS Project
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in
+the documentation and/or other materials provided with the
+distribution.
+3. Neither the name of the OpenBLAS project nor the names of
+its contributors may be used to endorse or promote products
+derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*****************************************************************************/
+
+
+#include "common.h"
+
+#if defined(DSDOT)
+double CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
+#else
+FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
+#endif
+{
+       BLASLONG i=0;
+       BLASLONG ix=0,iy=0;
+
+#if defined(DSDOT)
+       double dot = 0.0 ;
+#else
+       FLOAT  dot = 0.0 ;
+#endif
+
+       if ( n < 0 )  return(dot);
+
+       if ( (inc_x == 1) && (inc_y == 1) )
+       {
+
+               int n1 = n & -4;
+
+               while(i < n1)
+               {
+
+#if defined(DSDOT)
+                       dot += (double) y[i] * (double) x[i]
+                           + (double) y[i+1] * (double) x[i+1]
+                           + (double) y[i+2] * (double) x[i+2]
+                           + (double) y[i+3] * (double) x[i+3] ;
+#else
+                       dot += y[i] * x[i]
+                           + y[i+1] * x[i+1]
+                           + y[i+2] * x[i+2]
+                           + y[i+3] * x[i+3] ;
+#endif
+                       i+=4 ;
+
+               }
+
+               while(i < n)
+               {
+
+#if defined(DSDOT)
+                       dot += (double) y[i] * (double) x[i] ;
+#else
+                       dot += y[i] * x[i] ;
+#endif
+                       i++ ;
+
+               }
+               return(dot);
+
+
+       }
+
+       while(i < n)
+       {
+
+#if defined(DSDOT)
+               dot += (double) y[iy] * (double) x[ix] ;
+#else
+               dot += y[iy] * x[ix] ;
+#endif
+               ix  += inc_x ;
+               iy  += inc_y ;
+               i++ ;
+
+       }
+       return(dot);
+
+}
+
+

diff --git a/kernel/x86_64/KERNEL b/kernel/x86_64/KERNEL
index 9dd219c..ec21826 100644 (file)
--- a/kernel/x86_64/KERNEL
+++ b/kernel/x86_64/KERNEL
@@ -119,15 +119,13 @@ XCOPYKERNEL = zcopy.S
 endif
 
 ifndef SDOTKERNEL
-SDOTKERNEL = ../arm/dot.c
+SDOTKERNEL = ../generic/dot.c 
 endif
 
-
 ifndef DSDOTKERNEL
-DSDOTKERNEL = ../arm/dot.c 
+DSDOTKERNEL = ../generic/dot.c 
 endif
 
-
 ifndef DDOTKERNEL
 DDOTKERNEL =  dot_sse2.S
 endif