lib/raid6: Add SSSE3 optimized recovery functions

Add SSSE3 optimized recovery functions, as well as a system
for selecting the most appropriate recovery functions to use.

Originally-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/raid6/mktables.c b/lib/raid6/mktables.c
index 8a3780902cec..39787db588b0 100644
--- a/lib/raid6/mktables.c
+++ b/lib/raid6/mktables.c
@@ -81,6 +81,31 @@ int main(int argc, char *argv[])
         printf("EXPORT_SYMBOL(raid6_gfmul);\n");
         printf("#endif\n");
 
+        /* Compute vector multiplication table */
+        printf("\nconst u8  __attribute__((aligned(256)))\n"
+                "raid6_vgfmul[256][32] =\n"
+                "{\n");
+        for (i = 0; i < 256; i++) {
+                printf("\t{\n");
+                for (j = 0; j < 16; j += 8) {
+                        printf("\t\t");
+                        for (k = 0; k < 8; k++)
+                                printf("0x%02x,%c", gfmul(i, j + k),
+                                       (k == 7) ? '\n' : ' ');
+                }
+                for (j = 0; j < 16; j += 8) {
+                        printf("\t\t");
+                        for (k = 0; k < 8; k++)
+                                printf("0x%02x,%c", gfmul(i, (j + k) << 4),
+                                       (k == 7) ? '\n' : ' ');
+                }
+                printf("\t},\n");
+        }
+        printf("};\n");
+        printf("#ifdef __KERNEL__\n");
+        printf("EXPORT_SYMBOL(raid6_vgfmul);\n");
+        printf("#endif\n");
+
         /* Compute power-of-2 table (exponent) */
         v = 1;
         printf("\nconst u8 __attribute__((aligned(256)))\n"