added optimized ddot-kernel for sandybridge

diff --git a/kernel/x86_64/ddot.c b/kernel/x86_64/ddot.c
index 9eda0fc..f857c2f 100644 (file)
--- a/kernel/x86_64/ddot.c
+++ b/kernel/x86_64/ddot.c
@@ -35,6 +35,8 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "ddot_microk_nehalem-2.c"
 #elif defined(HASWELL)
 #include "ddot_microk_haswell-2.c"
+#elif defined(SANDYBRIDGE)
+#include "ddot_microk_sandy-2.c"
 #endif
 
 

diff --git a/kernel/x86_64/ddot_microk_sandy-2.c b/kernel/x86_64/ddot_microk_sandy-2.c
new file mode 100644 (file)
index 0000000..e2e6701
--- /dev/null
+++ b/kernel/x86_64/ddot_microk_sandy-2.c
@@ -0,0 +1,100 @@
+/***************************************************************************
+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__
+       (
+       "vxorpd         %%ymm4, %%ymm4, %%ymm4               \n\t"
+       "vxorpd         %%ymm5, %%ymm5, %%ymm5               \n\t"
+       "vxorpd         %%ymm6, %%ymm6, %%ymm6               \n\t"
+       "vxorpd         %%ymm7, %%ymm7, %%ymm7               \n\t"
+
+       ".align 16                                           \n\t"
+       "1:                                          \n\t"
+        "vmovups                  (%2,%0,8), %%ymm12         \n\t"  // 2 * x
+        "vmovups                32(%2,%0,8), %%ymm13         \n\t"  // 2 * x
+        "vmovups                64(%2,%0,8), %%ymm14         \n\t"  // 2 * x
+        "vmovups                96(%2,%0,8), %%ymm15         \n\t"  // 2 * x
+
+       "vmulpd      (%3,%0,8), %%ymm12, %%ymm12 \n\t"  // 2 * y
+       "vmulpd    32(%3,%0,8), %%ymm13, %%ymm13 \n\t"  // 2 * y
+       "vmulpd    64(%3,%0,8), %%ymm14, %%ymm14 \n\t"  // 2 * y
+       "vmulpd    96(%3,%0,8), %%ymm15, %%ymm15 \n\t"  // 2 * y
+
+       "vaddpd      %%ymm4 , %%ymm12, %%ymm4 \n\t"  // 2 * y
+       "vaddpd      %%ymm5 , %%ymm13, %%ymm5 \n\t"  // 2 * y
+       "vaddpd      %%ymm6 , %%ymm14, %%ymm6 \n\t"  // 2 * y
+       "vaddpd      %%ymm7 , %%ymm15, %%ymm7 \n\t"  // 2 * y
+
+       "addq           $16 , %0                     \n\t"
+       "subq           $16 , %1                     \n\t"              
+       "jnz            1b                           \n\t"
+
+       "vextractf128   $1 , %%ymm4 , %%xmm12        \n\t"
+       "vextractf128   $1 , %%ymm5 , %%xmm13        \n\t"
+       "vextractf128   $1 , %%ymm6 , %%xmm14        \n\t"
+       "vextractf128   $1 , %%ymm7 , %%xmm15        \n\t"
+
+       "vaddpd        %%xmm4, %%xmm12, %%xmm4  \n\t"
+       "vaddpd        %%xmm5, %%xmm13, %%xmm5  \n\t"
+       "vaddpd        %%xmm6, %%xmm14, %%xmm6  \n\t"
+       "vaddpd        %%xmm7, %%xmm15, %%xmm7  \n\t"
+
+       "vaddpd        %%xmm4, %%xmm5, %%xmm4   \n\t"
+       "vaddpd        %%xmm6, %%xmm7, %%xmm6   \n\t"
+       "vaddpd        %%xmm4, %%xmm6, %%xmm4   \n\t"
+
+       "vhaddpd        %%xmm4, %%xmm4, %%xmm4  \n\t"
+
+       "vmovsd         %%xmm4,    (%4)         \n\t"
+       "vzeroupper                             \n\t"
+
+       :
+        : 
+          "r" (i),     // 0    
+         "r" (n),      // 1
+          "r" (x),      // 2
+          "r" (y),      // 3
+          "r" (dot)     // 4
+       : "cc", 
+         "%xmm4", "%xmm5", 
+         "%xmm6", "%xmm7", 
+         "%xmm12", "%xmm13", "%xmm14", "%xmm15",
+         "memory"
+       );
+
+} 
+
+