diff options
Diffstat (limited to 'lib/gen_crc32table.c')
-rw-r--r-- | lib/gen_crc32table.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/gen_crc32table.c b/lib/gen_crc32table.c index eced7696eb7c..99ac744848fb 100644 --- a/lib/gen_crc32table.c +++ b/lib/gen_crc32table.c | |||
@@ -4,8 +4,17 @@ | |||
4 | 4 | ||
5 | #define ENTRIES_PER_LINE 4 | 5 | #define ENTRIES_PER_LINE 4 |
6 | 6 | ||
7 | #if CRC_LE_BITS <= 8 | ||
7 | #define LE_TABLE_SIZE (1 << CRC_LE_BITS) | 8 | #define LE_TABLE_SIZE (1 << CRC_LE_BITS) |
9 | #else | ||
10 | #define LE_TABLE_SIZE 256 | ||
11 | #endif | ||
12 | |||
13 | #if CRC_BE_BITS <= 8 | ||
8 | #define BE_TABLE_SIZE (1 << CRC_BE_BITS) | 14 | #define BE_TABLE_SIZE (1 << CRC_BE_BITS) |
15 | #else | ||
16 | #define BE_TABLE_SIZE 256 | ||
17 | #endif | ||
9 | 18 | ||
10 | static uint32_t crc32table_le[4][256]; | 19 | static uint32_t crc32table_le[4][256]; |
11 | static uint32_t crc32table_be[4][256]; | 20 | static uint32_t crc32table_be[4][256]; |
@@ -24,7 +33,7 @@ static void crc32init_le(void) | |||
24 | 33 | ||
25 | crc32table_le[0][0] = 0; | 34 | crc32table_le[0][0] = 0; |
26 | 35 | ||
27 | for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) { | 36 | for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) { |
28 | crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); | 37 | crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0); |
29 | for (j = 0; j < LE_TABLE_SIZE; j += 2 * i) | 38 | for (j = 0; j < LE_TABLE_SIZE; j += 2 * i) |
30 | crc32table_le[0][i + j] = crc ^ crc32table_le[0][j]; | 39 | crc32table_le[0][i + j] = crc ^ crc32table_le[0][j]; |