Commit 54212cf4 authored by Oliver Pinter's avatar Oliver Pinter Committed by Linus Torvalds
Browse files

coding style cleanups for drivers/md/mktables.c


Signed-off-by: default avatarOliver Pinter <oliver.pntr@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 91c43132
......@@ -26,100 +26,104 @@
static uint8_t gfmul(uint8_t a, uint8_t b)
{
uint8_t v = 0;
while ( b ) {
if ( b & 1 ) v ^= a;
a = (a << 1) ^ (a & 0x80 ? 0x1d : 0);
b >>= 1;
}
return v;
uint8_t v = 0;
while (b) {
if (b & 1)
v ^= a;
a = (a << 1) ^ (a & 0x80 ? 0x1d : 0);
b >>= 1;
}
return v;
}
static uint8_t gfpow(uint8_t a, int b)
{
uint8_t v = 1;
b %= 255;
if ( b < 0 )
b += 255;
while ( b ) {
if ( b & 1 ) v = gfmul(v,a);
a = gfmul(a,a);
b >>= 1;
}
return v;
uint8_t v = 1;
b %= 255;
if (b < 0)
b += 255;
while (b) {
if (b & 1)
v = gfmul(v, a);
a = gfmul(a, a);
b >>= 1;
}
return v;
}
int main(int argc, char *argv[])
{
int i, j, k;
uint8_t v;
uint8_t exptbl[256], invtbl[256];
printf("#include \"raid6.h\"\n");
/* Compute multiplication table */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfmul[256][256] =\n"
"{\n");
for ( i = 0 ; i < 256 ; i++ ) {
printf("\t{\n");
for ( j = 0 ; j < 256 ; j += 8 ) {
printf("\t\t");
for ( k = 0 ; k < 8 ; k++ ) {
printf("0x%02x, ", gfmul(i,j+k));
}
printf("\n");
}
printf("\t},\n");
}
printf("};\n");
/* Compute power-of-2 table (exponent) */
v = 1;
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfexp[256] =\n"
"{\n");
for ( i = 0 ; i < 256 ; i += 8 ) {
printf("\t");
for ( j = 0 ; j < 8 ; j++ ) {
exptbl[i+j] = v;
printf("0x%02x, ", v);
v = gfmul(v,2);
if ( v == 1 ) v = 0; /* For entry 255, not a real entry */
}
printf("\n");
}
printf("};\n");
/* Compute inverse table x^-1 == x^254 */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfinv[256] =\n"
"{\n");
for ( i = 0 ; i < 256 ; i += 8 ) {
printf("\t");
for ( j = 0 ; j < 8 ; j++ ) {
invtbl[i+j] = v = gfpow(i+j,254);
printf("0x%02x, ", v);
}
printf("\n");
}
printf("};\n");
/* Compute inv(2^x + 1) (exponent-xor-inverse) table */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfexi[256] =\n"
"{\n");
for ( i = 0 ; i < 256 ; i += 8 ) {
printf("\t");
for ( j = 0 ; j < 8 ; j++ ) {
printf("0x%02x, ", invtbl[exptbl[i+j]^1]);
}
printf("\n");
}
printf("};\n\n");
return 0;
int i, j, k;
uint8_t v;
uint8_t exptbl[256], invtbl[256];
printf("#include \"raid6.h\"\n");
/* Compute multiplication table */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfmul[256][256] =\n"
"{\n");
for (i = 0; i < 256; i++) {
printf("\t{\n");
for (j = 0; j < 256; j += 8) {
printf("\t\t");
for (k = 0; k < 8; k++)
printf("0x%02x, ", gfmul(i, j+k));
printf("\n");
}
printf("\t},\n");
}
printf("};\n");
/* Compute power-of-2 table (exponent) */
v = 1;
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfexp[256] =\n"
"{\n");
for (i = 0; i < 256; i += 8) {
printf("\t");
for (j = 0; j < 8; j++) {
exptbl[i+j] = v;
printf("0x%02x, ", v);
v = gfmul(v, 2);
if (v == 1)
v = 0; /* For entry 255, not a real entry */
}
printf("\n");
}
printf("};\n");
/* Compute inverse table x^-1 == x^254 */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfinv[256] =\n"
"{\n");
for (i = 0; i < 256; i += 8) {
printf("\t");
for (j = 0; j < 8; j++) {
v = gfpow(i+j, 254);
invtbl[i+j] = v;
printf("0x%02x, ", v);
}
printf("\n");
}
printf("};\n");
/* Compute inv(2^x + 1) (exponent-xor-inverse) table */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfexi[256] =\n"
"{\n");
for (i = 0; i < 256; i += 8) {
printf("\t");
for (j = 0; j < 8; j++)
printf("0x%02x, ", invtbl[exptbl[i+j]^1]);
printf("\n");
}
printf("};\n\n");
return 0;
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment