added optimized dsymv_U kernel for nehalem

kernel/x86_64/KERNEL.NEHALEM

@@ -1,4 +1,4 @@
-#DSYMV_U_KERNEL = dsymv_U.c
+DSYMV_U_KERNEL = dsymv_U.c
 SSYMV_U_KERNEL = ssymv_U.c
 
 SGEMVNKERNEL = sgemv_n.c

kernel/x86_64/dsymv_U_microk_nehalem-2.c

@@ -0,0 +1,125 @@
+/***************************************************************************
+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_4x4 1
+static void dsymv_kernel_4x4( BLASLONG n, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3,  FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2) __attribute__ ((noinline));
+
+static void dsymv_kernel_4x4(BLASLONG n, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3, FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2)
+{
+
+	BLASLONG register i = 0;
+
+	__asm__  __volatile__
+	(
+	"xorpd          %%xmm0 , %%xmm0              \n\t"	// temp2[0]
+	"xorpd          %%xmm1 , %%xmm1              \n\t"	// temp2[1]
+	"xorpd          %%xmm2 , %%xmm2              \n\t"	// temp2[2]
+	"xorpd          %%xmm3 , %%xmm3              \n\t"	// temp2[3]
+	"movsd	       (%8),    %%xmm4	             \n\t"	// temp1[0]
+	"movsd        8(%8),    %%xmm5	             \n\t"	// temp1[1]
+	"movsd       16(%8),    %%xmm6	             \n\t"	// temp1[2]
+	"movsd       24(%8),    %%xmm7	             \n\t"	// temp1[3]
+	"shufpd $0,  %%xmm4, %%xmm4                  \n\t"
+	"shufpd $0,  %%xmm5, %%xmm5                  \n\t"
+	"shufpd $0,  %%xmm6, %%xmm6                  \n\t"
+	"shufpd $0,  %%xmm7, %%xmm7                  \n\t"
+
+	"xorq		%0,%0			     \n\t"
+
+	".align 16		  		       \n\t"
+	".L01LOOP%=:				       \n\t"
+	"movups	            (%4,%0,8), %%xmm12	       \n\t"	// 2 * a
+	"movups	            (%2,%0,8), %%xmm8	       \n\t"	// 2 * x
+	"movups		    %%xmm12  , %%xmm11	       \n\t"
+	"movups	            (%3,%0,8), %%xmm9         \n\t"	// 2 * y
+	"movups	            (%5,%0,8), %%xmm13	       \n\t"	// 2 * a
+
+	"mulpd		    %%xmm4   , %%xmm11	       \n\t"    // temp1 * a
+	"addpd		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
+	"mulpd		    %%xmm8   , %%xmm12	       \n\t"    // a * x
+	"addpd		    %%xmm12  , %%xmm0 	       \n\t"    // temp2 += x * a
+
+	"movups	            (%6,%0,8), %%xmm14	       \n\t"	// 2 * a
+	"movups	            (%7,%0,8), %%xmm15	       \n\t"	// 2 * a
+
+	"movups		    %%xmm13  , %%xmm11	       \n\t"
+	"mulpd		    %%xmm5   , %%xmm11	       \n\t"    // temp1 * a
+	"addpd		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
+	"mulpd		    %%xmm8   , %%xmm13	       \n\t"    // a * x
+	"addpd		    %%xmm13  , %%xmm1 	       \n\t"    // temp2 += x * a
+
+	"movups		    %%xmm14  , %%xmm11	       \n\t"
+	"mulpd		    %%xmm6   , %%xmm11	       \n\t"    // temp1 * a
+	"addpd		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
+	"mulpd		    %%xmm8   , %%xmm14	       \n\t"    // a * x
+	"addpd		    %%xmm14  , %%xmm2 	       \n\t"    // temp2 += x * a
+
+        "addq		$2 , %0	  	 	      \n\t"
+	"movups		    %%xmm15  , %%xmm11	       \n\t"
+	"mulpd		    %%xmm7   , %%xmm11	       \n\t"    // temp1 * a
+	"addpd		    %%xmm11  , %%xmm9	       \n\t"    // y += temp1 * a
+	"mulpd		    %%xmm8   , %%xmm15	       \n\t"    // a * x
+	"addpd		    %%xmm15  , %%xmm3 	       \n\t"    // temp2 += x * a
+
+	"movups             %%xmm9,-16(%3,%0,8)       \n\t"    // 2 * y
+
+	"subq	        $2 , %1			      \n\t"		
+	"jnz		.L01LOOP%=		      \n\t"
+
+	"haddpd        %%xmm0, %%xmm0  \n\t"
+	"haddpd        %%xmm1, %%xmm1  \n\t"
+	"haddpd        %%xmm2, %%xmm2  \n\t"
+	"haddpd        %%xmm3, %%xmm3  \n\t"
+
+	"movsd         %%xmm0 ,   (%9)		\n\t"	// save temp2
+	"movsd         %%xmm1 ,  8(%9)		\n\t"	// save temp2
+	"movsd         %%xmm2 , 16(%9)		\n\t"	// save temp2
+	"movsd         %%xmm3 , 24(%9)		\n\t"	// save temp2
+
+	:
+        : 
+          "r" (i),	// 0	
+	  "r" (n),  	// 1
+          "r" (x),      // 2
+          "r" (y),      // 3
+          "r" (a0),     // 4
+          "r" (a1),     // 5
+          "r" (a2),     // 6
+          "r" (a3),     // 7
+          "r" (temp1),  // 8
+          "r" (temp2)   // 9
+	: "cc", 
+	  "%xmm0", "%xmm1", "%xmm2", "%xmm3", 
+	  "%xmm4", "%xmm5", "%xmm6", "%xmm7", 
+	  "%xmm8", "%xmm9", "%xmm10", "%xmm11", 
+	  "%xmm12", "%xmm13", "%xmm14", "%xmm15",
+	  "memory"
+	);
+
+} 
+
+