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authorOliver Pinter <oliver.pntr@gmail.com>2008-02-06 04:39:47 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 13:41:18 -0500
commit54212cf4054e7cf44f3ca97c3c5fb942dbfe7013 (patch)
tree11a2c20dbe43baacdf569a5ccfb6d0e0e6824bdb /drivers
parent91c4313206e4409871e2ddd13c29508afe1c8834 (diff)
coding style cleanups for drivers/md/mktables.c
Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com> Cc: Neil Brown <neilb@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/mktables.c180
1 files changed, 92 insertions, 88 deletions
diff --git a/drivers/md/mktables.c b/drivers/md/mktables.c
index adef299908cf..339afd0e1b15 100644
--- a/drivers/md/mktables.c
+++ b/drivers/md/mktables.c
@@ -26,100 +26,104 @@
26 26
27static uint8_t gfmul(uint8_t a, uint8_t b) 27static uint8_t gfmul(uint8_t a, uint8_t b)
28{ 28{
29 uint8_t v = 0; 29 uint8_t v = 0;
30 30
31 while ( b ) { 31 while (b) {
32 if ( b & 1 ) v ^= a; 32 if (b & 1)
33 a = (a << 1) ^ (a & 0x80 ? 0x1d : 0); 33 v ^= a;
34 b >>= 1; 34 a = (a << 1) ^ (a & 0x80 ? 0x1d : 0);
35 } 35 b >>= 1;
36 return v; 36 }
37
38 return v;
37} 39}
38 40
39static uint8_t gfpow(uint8_t a, int b) 41static uint8_t gfpow(uint8_t a, int b)
40{ 42{
41 uint8_t v = 1; 43 uint8_t v = 1;
42 44
43 b %= 255; 45 b %= 255;
44 if ( b < 0 ) 46 if (b < 0)
45 b += 255; 47 b += 255;
46 48
47 while ( b ) { 49 while (b) {
48 if ( b & 1 ) v = gfmul(v,a); 50 if (b & 1)
49 a = gfmul(a,a); 51 v = gfmul(v, a);
50 b >>= 1; 52 a = gfmul(a, a);
51 } 53 b >>= 1;
52 return v; 54 }
55
56 return v;
53} 57}
54 58
55int main(int argc, char *argv[]) 59int main(int argc, char *argv[])
56{ 60{
57 int i, j, k; 61 int i, j, k;
58 uint8_t v; 62 uint8_t v;
59 uint8_t exptbl[256], invtbl[256]; 63 uint8_t exptbl[256], invtbl[256];
60 64
61 printf("#include \"raid6.h\"\n"); 65 printf("#include \"raid6.h\"\n");
62 66
63 /* Compute multiplication table */ 67 /* Compute multiplication table */
64 printf("\nconst u8 __attribute__((aligned(256)))\n" 68 printf("\nconst u8 __attribute__((aligned(256)))\n"
65 "raid6_gfmul[256][256] =\n" 69 "raid6_gfmul[256][256] =\n"
66 "{\n"); 70 "{\n");
67 for ( i = 0 ; i < 256 ; i++ ) { 71 for (i = 0; i < 256; i++) {
68 printf("\t{\n"); 72 printf("\t{\n");
69 for ( j = 0 ; j < 256 ; j += 8 ) { 73 for (j = 0; j < 256; j += 8) {
70 printf("\t\t"); 74 printf("\t\t");
71 for ( k = 0 ; k < 8 ; k++ ) { 75 for (k = 0; k < 8; k++)
72 printf("0x%02x, ", gfmul(i,j+k)); 76 printf("0x%02x, ", gfmul(i, j+k));
73 } 77 printf("\n");
74 printf("\n"); 78 }
75 } 79 printf("\t},\n");
76 printf("\t},\n"); 80 }
77 } 81 printf("};\n");
78 printf("};\n"); 82
79 83 /* Compute power-of-2 table (exponent) */
80 /* Compute power-of-2 table (exponent) */ 84 v = 1;
81 v = 1; 85 printf("\nconst u8 __attribute__((aligned(256)))\n"
82 printf("\nconst u8 __attribute__((aligned(256)))\n" 86 "raid6_gfexp[256] =\n"
83 "raid6_gfexp[256] =\n" 87 "{\n");
84 "{\n"); 88 for (i = 0; i < 256; i += 8) {
85 for ( i = 0 ; i < 256 ; i += 8 ) { 89 printf("\t");
86 printf("\t"); 90 for (j = 0; j < 8; j++) {
87 for ( j = 0 ; j < 8 ; j++ ) { 91 exptbl[i+j] = v;
88 exptbl[i+j] = v; 92 printf("0x%02x, ", v);
89 printf("0x%02x, ", v); 93 v = gfmul(v, 2);
90 v = gfmul(v,2); 94 if (v == 1)
91 if ( v == 1 ) v = 0; /* For entry 255, not a real entry */ 95 v = 0; /* For entry 255, not a real entry */
92 } 96 }
93 printf("\n"); 97 printf("\n");
94 } 98 }
95 printf("};\n"); 99 printf("};\n");
96 100
97 /* Compute inverse table x^-1 == x^254 */ 101 /* Compute inverse table x^-1 == x^254 */
98 printf("\nconst u8 __attribute__((aligned(256)))\n" 102 printf("\nconst u8 __attribute__((aligned(256)))\n"
99 "raid6_gfinv[256] =\n" 103 "raid6_gfinv[256] =\n"
100 "{\n"); 104 "{\n");
101 for ( i = 0 ; i < 256 ; i += 8 ) { 105 for (i = 0; i < 256; i += 8) {
102 printf("\t"); 106 printf("\t");
103 for ( j = 0 ; j < 8 ; j++ ) { 107 for (j = 0; j < 8; j++) {
104 invtbl[i+j] = v = gfpow(i+j,254); 108 v = gfpow(i+j, 254);
105 printf("0x%02x, ", v); 109 invtbl[i+j] = v;
106 } 110 printf("0x%02x, ", v);
107 printf("\n"); 111 }
108 } 112 printf("\n");
109 printf("};\n"); 113 }
110 114 printf("};\n");
111 /* Compute inv(2^x + 1) (exponent-xor-inverse) table */ 115
112 printf("\nconst u8 __attribute__((aligned(256)))\n" 116 /* Compute inv(2^x + 1) (exponent-xor-inverse) table */
113 "raid6_gfexi[256] =\n" 117 printf("\nconst u8 __attribute__((aligned(256)))\n"
114 "{\n"); 118 "raid6_gfexi[256] =\n"
115 for ( i = 0 ; i < 256 ; i += 8 ) { 119 "{\n");
116 printf("\t"); 120 for (i = 0; i < 256; i += 8) {
117 for ( j = 0 ; j < 8 ; j++ ) { 121 printf("\t");
118 printf("0x%02x, ", invtbl[exptbl[i+j]^1]); 122 for (j = 0; j < 8; j++)
119 } 123 printf("0x%02x, ", invtbl[exptbl[i+j]^1]);
120 printf("\n"); 124 printf("\n");
121 } 125 }
122 printf("};\n\n"); 126 printf("};\n\n");
123 127
124 return 0; 128 return 0;
125} 129}