added new optimized sgemm kernel for SANDYBRIGE

Author: wernsaar

kernel/x86_64/KERNEL.SANDYBRIDGE

@@ -1,18 +1,16 @@
 SGEMVNKERNEL = sgemv_n.S
 SGEMVTKERNEL = sgemv_t.S
 
-
-SGEMMKERNEL    =  gemm_kernel_4x8_nehalem.S
-SGEMMINCOPY    =  gemm_ncopy_4.S
-SGEMMITCOPY    =  gemm_tcopy_4.S
-SGEMMONCOPY    =  ../generic/gemm_ncopy_8.c
-SGEMMOTCOPY    =  ../generic/gemm_tcopy_8.c
+SGEMMKERNEL    =  sgemm_kernel_16x4_sandy.S
+SGEMMINCOPY    =  ../generic/gemm_ncopy_16.c
+SGEMMITCOPY    =  ../generic/gemm_tcopy_16.c
+SGEMMONCOPY    =  ../generic/gemm_ncopy_4.c
+SGEMMOTCOPY    =  ../generic/gemm_tcopy_4.c
 SGEMMINCOPYOBJ =  sgemm_incopy$(TSUFFIX).$(SUFFIX)
 SGEMMITCOPYOBJ =  sgemm_itcopy$(TSUFFIX).$(SUFFIX)
 SGEMMONCOPYOBJ =  sgemm_oncopy$(TSUFFIX).$(SUFFIX)
 SGEMMOTCOPYOBJ =  sgemm_otcopy$(TSUFFIX).$(SUFFIX)
 
-
 DGEMMKERNEL    =  dgemm_kernel_4x8_sandy.S
 DGEMMINCOPY    =  ../generic/gemm_ncopy_8.c
 DGEMMITCOPY    =  ../generic/gemm_tcopy_8.c