added optimized ddot kernel for nehalem

kernel/x86_64/KERNEL.NEHALEM

@@ -1,4 +1,5 @@
 SDOTKERNEL     = sdot.c
+DDOTKERNEL     = ddot.c
 
 DSYMV_U_KERNEL = dsymv_U.c
 DSYMV_L_KERNEL = dsymv_L.c

kernel/x86_64/ddot.c

@@ -0,0 +1,110 @@
+/***************************************************************************
+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(BULLDOZER) || defined(PILEDRIVER)
+#include "ddot_microk_bulldozer-2.c"
+#elif defined(NEHALEM)
+#include "ddot_microk_nehalem-2.c"
+#endif
+
+
+#ifndef HAVE_KERNEL_8
+
+void ddot_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *d)
+{
+	BLASLONG register i = 0;
+	FLOAT dot = 0.0;
+
+	while(i < n)
+        {
+              dot += y[i]  * x[i]
+                  + y[i+1] * x[i+1]
+                  + y[i+2] * x[i+2]
+                  + y[i+3] * x[i+3]
+                  + y[i+4] * x[i+4]
+                  + y[i+5] * x[i+5]
+                  + y[i+6] * x[i+6]
+                  + y[i+7] * x[i+7] ;
+
+              i+=8 ;
+
+       }
+       *d += dot;
+
+}
+
+#endif
+
+FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
+{
+	BLASLONG i=0;
+	BLASLONG ix=0,iy=0;
+
+	FLOAT  dot = 0.0 ;
+
+	if ( n <= 0 )  return(dot);
+
+	if ( (inc_x == 1) && (inc_y == 1) )
+	{
+
+		int n1 = n & -8;
+
+		if ( n1 )
+			ddot_kernel_8(n1, x, y , &dot );
+
+
+		i = n1;
+		while(i < n)
+		{
+
+			dot += y[i] * x[i] ;
+			i++ ;
+
+		}
+		return(dot);
+
+
+	}
+
+	while(i < n)
+	{
+
+		dot += y[iy] * x[ix] ;
+		ix  += inc_x ;
+		iy  += inc_y ;
+		i++ ;
+
+	}
+	return(dot);
+
+}
+
+

kernel/x86_64/ddot_microk_nehalem-2.c

@@ -0,0 +1,94 @@
+/***************************************************************************
+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.
+*****************************************************************************/
+
+#define HAVE_KERNEL_8 1
+static void ddot_kernel_8( BLASLONG n, FLOAT *x, FLOAT *y , FLOAT *dot) __attribute__ ((noinline));
+
+static void ddot_kernel_8( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *dot)
+{
+
+
+	BLASLONG register i = 0;
+
+	__asm__  __volatile__
+	(
+	"xorpd		%%xmm4, %%xmm4	             \n\t"
+	"xorpd		%%xmm5, %%xmm5	             \n\t"
+	"xorpd		%%xmm6, %%xmm6	             \n\t"
+	"xorpd		%%xmm7, %%xmm7	             \n\t"
+
+	".align 16				            \n\t"
+	".L01LOOP%=:				            \n\t"
+
+        "movups                  (%2,%0,8), %%xmm12         \n\t"  // 2 * x
+        "movups                  (%3,%0,8), %%xmm8          \n\t"  // 2 * y
+        "movups                16(%2,%0,8), %%xmm13         \n\t"  // 2 * x
+        "movups                16(%3,%0,8), %%xmm9          \n\t"  // 2 * y
+        "movups                32(%2,%0,8), %%xmm14         \n\t"  // 2 * x
+        "movups                32(%3,%0,8), %%xmm10         \n\t"  // 2 * y
+        "movups                48(%2,%0,8), %%xmm15         \n\t"  // 2 * x
+        "movups                48(%3,%0,8), %%xmm11         \n\t"  // 2 * y
+
+	"mulpd          %%xmm8 , %%xmm12 		    \n\t"  
+	"mulpd          %%xmm9 , %%xmm13 		    \n\t"  
+	"mulpd          %%xmm10, %%xmm14 		    \n\t"  
+	"mulpd          %%xmm11, %%xmm15 		    \n\t"  
+
+	"addpd		%%xmm12, %%xmm4   \n\t"
+	"addpd		%%xmm13, %%xmm5   \n\t"
+	"addpd		%%xmm14, %%xmm6   \n\t"
+	"addpd		%%xmm15, %%xmm7   \n\t"
+
+	"addq		$8 , %0	  	 	             \n\t"
+	"subq	        $8 , %1			             \n\t"		
+	"jnz		.L01LOOP%=		             \n\t"
+
+	"addpd        %%xmm5, %%xmm4	\n\t"
+	"addpd        %%xmm7, %%xmm6	\n\t"
+	"addpd        %%xmm6, %%xmm4	\n\t"
+
+	"haddpd        %%xmm4, %%xmm4	\n\t"
+
+	"movsd	       %%xmm4,    (%4)	\n\t"
+
+	:
+        : 
+          "r" (i),	// 0	
+	  "r" (n),  	// 1
+          "r" (x),      // 2
+          "r" (y),      // 3
+          "r" (dot)     // 4
+	: "cc",  
+	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
+	  "%xmm8", "%xmm9", "%xmm10", "%xmm11",
+	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
+	  "memory"
+	);
+
+} 
+
+

kernel/x86_64/sdot_microk_nehalem-2.c

@@ -83,8 +83,8 @@ static void sdot_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *dot)
           "r" (y),      // 3
           "r" (dot)     // 4
 	: "cc", 
-	  "%xmm4", "%xmm5", 
-	  "%xmm6", "%xmm7", 
+	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
+	  "%xmm8", "%xmm9", "%xmm10", "%xmm11", 
 	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
 	  "memory"
 	);