POWER10: Improve copy performance

This patch aligns the stores to 32 byte boundary for scopy and dcopy
before entering into vector pair loop. For ccopy, changed the store
instructions to stxv to improve performance of unaligned cases.

kernel/power/ccopy_microk_power10.c

@@ -0,0 +1,115 @@
+/***************************************************************************
+Copyright (c) 2020, 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 1
+
+static void copy_kernel (BLASLONG n, FLOAT *x, FLOAT *y)
+{
+  __asm__
+    (
+       "lxvp		32, 0(%2)	\n\t"
+       "lxvp		34, 32(%2)	\n\t"
+       "lxvp		36, 64(%2)	\n\t"
+       "lxvp		38, 96(%2)	\n\t"
+       "lxvp		40, 128(%2)	\n\t"
+       "lxvp		42, 160(%2)	\n\t"
+       "lxvp		44, 192(%2)	\n\t"
+       "lxvp		46, 224(%2)	\n\t"
+
+       "addi		%2, %2, 256	\n\t"
+       "addic.		%1, %1, -32	\n\t"
+       "ble		two%=		\n\t"
+
+       ".align	5		\n"
+     "one%=:				\n\t"
+
+       "stxv		33, 0(%3)	\n\t"
+       "stxv		32, 16(%3)	\n\t"
+       "stxv		35, 32(%3)	\n\t"
+       "stxv		34, 48(%3)	\n\t"
+       "stxv		37, 64(%3)	\n\t"
+       "stxv		36, 80(%3)	\n\t"
+       "stxv		39, 96(%3)	\n\t"
+       "stxv		38, 112(%3)	\n\t"
+       "lxvp		32, 0(%2)	\n\t"
+       "lxvp		34, 32(%2)	\n\t"
+       "lxvp		36, 64(%2)	\n\t"
+       "lxvp		38, 96(%2)	\n\t"
+
+       "stxv		41, 128(%3)	\n\t"
+       "stxv		40, 144(%3)	\n\t"
+       "stxv		43, 160(%3)	\n\t"
+       "stxv		42, 176(%3)	\n\t"
+       "stxv		45, 192(%3)	\n\t"
+       "stxv		44, 208(%3)	\n\t"
+       "stxv		47, 224(%3)	\n\t"
+       "stxv		46, 240(%3)	\n\t"
+       "lxvp		40, 128(%2)	\n\t"
+       "lxvp		42, 160(%2)	\n\t"
+       "lxvp		44, 192(%2)	\n\t"
+       "lxvp		46, 224(%2)	\n\t"
+
+
+       "addi		%3, %3, 256	\n\t"
+       "addi		%2, %2, 256	\n\t"
+
+       "addic.		%1, %1, -32	\n\t"
+       "bgt		one%=		\n"
+
+     "two%=:				\n\t"
+
+       "stxv		33, 0(%3)	\n\t"
+       "stxv		32, 16(%3)	\n\t"
+       "stxv		35, 32(%3)	\n\t"
+       "stxv		34, 48(%3)	\n\t"
+       "stxv		37, 64(%3)	\n\t"
+       "stxv		36, 80(%3)	\n\t"
+       "stxv		39, 96(%3)	\n\t"
+       "stxv		38, 112(%3)	\n\t"
+       "stxv		41, 128(%3)	\n\t"
+       "stxv		40, 144(%3)	\n\t"
+       "stxv		43, 160(%3)	\n\t"
+       "stxv		42, 176(%3)	\n\t"
+       "stxv		45, 192(%3)	\n\t"
+       "stxv		44, 208(%3)	\n\t"
+       "stxv		47, 224(%3)	\n\t"
+       "stxv		46, 240(%3)	\n\t"
+
+     "#n=%1 x=%4=%2 y=%0=%3"
+     :
+       "=m" (*y),
+       "+r" (n),	// 1
+       "+b" (x),	// 2
+       "+b" (y) 	// 3
+     :
+       "m" (*x)
+     :
+       "cr0",
+       "vs32","vs33","vs34","vs35","vs36","vs37","vs38","vs39",
+       "vs40","vs41","vs42","vs43","vs44","vs45","vs46","vs47"
+     );
+}

kernel/power/ccopy_power10.c

@@ -28,7 +28,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "common.h"
 
 #if defined(__VEC__) || defined(__ALTIVEC__)
-#include "copy_microk_power10.c"
+#include "ccopy_microk_power10.c"
 #endif
 
 #ifndef HAVE_KERNEL
@@ -86,7 +86,7 @@ int CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
 	if ( (inc_x == 1) && (inc_y == 1 ))
 	{
 
-		BLASLONG n1 = n & -64;
+		BLASLONG n1 = n & -32;
 		if ( n1 > 0 )
 		{
 			copy_kernel(n1, x, y);

kernel/power/copy_microk_power10.c

@@ -62,38 +62,39 @@ static void copy_kernel (BLASLONG n, FLOAT *x, FLOAT *y)
      "one%=:				\n\t"
 
        "stxvp		32, 0(%3)	\n\t"
-       "lxvp		32, 0(%2)	\n\t"
        "stxvp		34, 32(%3)	\n\t"
-       "lxvp		34, 32(%2)	\n\t"
        "stxvp		36, 64(%3)	\n\t"
-       "lxvp		36, 64(%2)	\n\t"
        "stxvp		38, 96(%3)	\n\t"
+       "lxvp		32, 0(%2)	\n\t"
+       "lxvp		34, 32(%2)	\n\t"
+       "lxvp		36, 64(%2)	\n\t"
        "lxvp		38, 96(%2)	\n\t"
 
        "stxvp		40, 128(%3)	\n\t"
-       "lxvp		40, 128(%2)	\n\t"
        "stxvp		42, 160(%3)	\n\t"
-       "lxvp		42, 160(%2)	\n\t"
        "stxvp		44, 192(%3)	\n\t"
-       "lxvp		44, 192(%2)	\n\t"
        "stxvp		46, 224(%3)	\n\t"
+       "lxvp		40, 128(%2)	\n\t"
+       "lxvp		42, 160(%2)	\n\t"
+       "lxvp		44, 192(%2)	\n\t"
        "lxvp		46, 224(%2)	\n\t"
 
        "stxvp		48, 256(%3)	\n\t"
-       "lxvp		48, 256(%2)	\n\t"
        "stxvp		50, 288(%3)	\n\t"
-       "lxvp		50, 288(%2)	\n\t"
        "stxvp		52, 320(%3)	\n\t"
-       "lxvp		52, 320(%2)	\n\t"
        "stxvp		54, 352(%3)	\n\t"
+       "lxvp		48, 256(%2)	\n\t"
+       "lxvp		50, 288(%2)	\n\t"
+       "lxvp		52, 320(%2)	\n\t"
        "lxvp		54, 352(%2)	\n\t"
+
        "stxvp		56, 384(%3)	\n\t"
-       "lxvp		56, 384(%2)	\n\t"
        "stxvp		58, 416(%3)	\n\t"
-       "lxvp		58, 416(%2)	\n\t"
        "stxvp		60, 448(%3)	\n\t"
-       "lxvp		60, 448(%2)	\n\t"
        "stxvp		62, 480(%3)	\n\t"
+       "lxvp		56, 384(%2)	\n\t"
+       "lxvp		58, 416(%2)	\n\t"
+       "lxvp		60, 448(%2)	\n\t"
        "lxvp		62, 480(%2)	\n\t"
 
        "addi		%3, %3, 512	\n\t"

kernel/power/dcopy_power10.c

@@ -85,12 +85,18 @@ int CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
 
 	if ( (inc_x == 1) && (inc_y == 1 ))
 	{
-
-		BLASLONG n1 = n & -64;
-		if ( n1 > 0 )
+		if ( n >= 64 )
+		{
+			BLASLONG align = ((32 - ((uintptr_t)y & (uintptr_t)0x1F)) >> 3) & 0x3;
+			for (i = 0; i < align; i++) {
+				y[i] = x[i] ;
+			}
+		}
+		BLASLONG n1 = (n-i) & -64;
+		if ( n1 )
 		{
-			copy_kernel(n1, x, y);
-			i=n1;
+			copy_kernel(n1, &x[i], &y[i]);
+			i += n1;
 		}
 
 		while(i < n)

kernel/power/scopy_power10.c

@@ -86,11 +86,18 @@ int CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
 	if ( (inc_x == 1) && (inc_y == 1 ))
 	{
 
-		BLASLONG n1 = n & -128;
-		if ( n1 > 0 )
+		if ( n >= 128 )
 		{
-			copy_kernel (n1, x, y);
-			i=n1;
+			BLASLONG align = ((32 - ((uintptr_t)y & (uintptr_t)0x1F)) >> 2) & 0x7;
+			for (i = 0; i < align; i++) {
+				y[i] = x[i] ;
+			}
+		}
+		BLASLONG n1 = (n-i) & -128;
+		if ( n1 )
+		{
+			copy_kernel(n1, &x[i], &y[i]);
+			i += n1;
 		}
 
 		while(i < n)