kernel-ark/lib/crc32.c
Bob Pearson 3863ef31dc crc32: simplify unit test code
Replace the unit test provided in crc32.c, which doesn't have a makefile
and doesn't compile with current headers, with a simpler self test
routine that also gives a measure of performance and runs at module init
time.  The self test option can be enabled through a configuration
option CONFIG_CRC32_SELFTEST.

The test stresses the pre and post loops and is thus not very realistic
since actual uses will likely have addresses and lengths that are at
least 4 byte aligned.  However, the main loop is long enough so that the
performance is dominated by that loop.

The expected values for crc32_le and crc32_be were generated with the
original version of crc32.c using CRC_BITS_LE = 8 and CRC_BITS_BE = 8.
These values were then used to check all the values of the BITS
parameters in both the original and new versions.

The performance results show some variability from run to run in spite
of attempts to both warm the cache and reduce the amount of OS noise by
limiting interrutps during the test.  To get comparable results and to
analyse options wrt performance the best time reported over a small
sample of runs has been taken.

[djwong@us.ibm.com: Minor changelog tweaks]
Signed-off-by: Bob Pearson <rpearson@systemfabricworks.com>
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:37 -07:00

912 lines
38 KiB
C

/*
* Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
* Nicer crc32 functions/docs submitted by linux@horizon.com. Thanks!
* Code was from the public domain, copyright abandoned. Code was
* subsequently included in the kernel, thus was re-licensed under the
* GNU GPL v2.
*
* Oct 12, 2000 Matt Domsch <Matt_Domsch@dell.com>
* Same crc32 function was used in 5 other places in the kernel.
* I made one version, and deleted the others.
* There are various incantations of crc32(). Some use a seed of 0 or ~0.
* Some xor at the end with ~0. The generic crc32() function takes
* seed as an argument, and doesn't xor at the end. Then individual
* users can do whatever they need.
* drivers/net/smc9194.c uses seed ~0, doesn't xor with ~0.
* fs/jffs2 uses seed 0, doesn't xor with ~0.
* fs/partitions/efi.c uses seed ~0, xor's with ~0.
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
/* see: Documentation/crc32.txt for a description of algorithms */
#include <linux/crc32.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/atomic.h>
#include "crc32defs.h"
#if CRC_LE_BITS == 8
# define tole(x) __constant_cpu_to_le32(x)
#else
# define tole(x) (x)
#endif
#if CRC_BE_BITS == 8
# define tobe(x) __constant_cpu_to_be32(x)
#else
# define tobe(x) (x)
#endif
#include "crc32table.h"
MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>");
MODULE_DESCRIPTION("Ethernet CRC32 calculations");
MODULE_LICENSE("GPL");
#if CRC_LE_BITS == 8 || CRC_BE_BITS == 8
static inline u32
crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
{
# ifdef __LITTLE_ENDIAN
# define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8)
# define DO_CRC4 crc = t3[(crc) & 255] ^ \
t2[(crc >> 8) & 255] ^ \
t1[(crc >> 16) & 255] ^ \
t0[(crc >> 24) & 255]
# else
# define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
# define DO_CRC4 crc = t0[(crc) & 255] ^ \
t1[(crc >> 8) & 255] ^ \
t2[(crc >> 16) & 255] ^ \
t3[(crc >> 24) & 255]
# endif
const u32 *b;
size_t rem_len;
const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3];
/* Align it */
if (unlikely((long)buf & 3 && len)) {
do {
DO_CRC(*buf++);
} while ((--len) && ((long)buf)&3);
}
rem_len = len & 3;
/* load data 32 bits wide, xor data 32 bits wide. */
len = len >> 2;
b = (const u32 *)buf;
for (--b; len; --len) {
crc ^= *++b; /* use pre increment for speed */
DO_CRC4;
}
len = rem_len;
/* And the last few bytes */
if (len) {
u8 *p = (u8 *)(b + 1) - 1;
do {
DO_CRC(*++p); /* use pre increment for speed */
} while (--len);
}
return crc;
#undef DO_CRC
#undef DO_CRC4
}
#endif
/**
* crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32
* @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for
* other uses, or the previous crc32 value if computing incrementally.
* @p: pointer to buffer over which CRC is run
* @len: length of buffer @p
*/
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len);
#if CRC_LE_BITS == 1
/*
* In fact, the table-based code will work in this case, but it can be
* simplified by inlining the table in ?: form.
*/
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
{
int i;
while (len--) {
crc ^= *p++;
for (i = 0; i < 8; i++)
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
}
return crc;
}
#else /* Table-based approach */
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
{
# if CRC_LE_BITS == 8
const u32 (*tab)[] = crc32table_le;
crc = __cpu_to_le32(crc);
crc = crc32_body(crc, p, len, tab);
return __le32_to_cpu(crc);
# elif CRC_LE_BITS == 4
while (len--) {
crc ^= *p++;
crc = (crc >> 4) ^ crc32table_le[crc & 15];
crc = (crc >> 4) ^ crc32table_le[crc & 15];
}
return crc;
# elif CRC_LE_BITS == 2
while (len--) {
crc ^= *p++;
crc = (crc >> 2) ^ crc32table_le[crc & 3];
crc = (crc >> 2) ^ crc32table_le[crc & 3];
crc = (crc >> 2) ^ crc32table_le[crc & 3];
crc = (crc >> 2) ^ crc32table_le[crc & 3];
}
return crc;
# endif
}
#endif
/**
* crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32
* @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for
* other uses, or the previous crc32 value if computing incrementally.
* @p: pointer to buffer over which CRC is run
* @len: length of buffer @p
*/
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len);
#if CRC_BE_BITS == 1
/*
* In fact, the table-based code will work in this case, but it can be
* simplified by inlining the table in ?: form.
*/
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
{
int i;
while (len--) {
crc ^= *p++ << 24;
for (i = 0; i < 8; i++)
crc =
(crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE :
0);
}
return crc;
}
#else /* Table-based approach */
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
{
# if CRC_BE_BITS == 8
const u32 (*tab)[] = crc32table_be;
crc = __cpu_to_be32(crc);
crc = crc32_body(crc, p, len, tab);
return __be32_to_cpu(crc);
# elif CRC_BE_BITS == 4
while (len--) {
crc ^= *p++ << 24;
crc = (crc << 4) ^ crc32table_be[crc >> 28];
crc = (crc << 4) ^ crc32table_be[crc >> 28];
}
return crc;
# elif CRC_BE_BITS == 2
while (len--) {
crc ^= *p++ << 24;
crc = (crc << 2) ^ crc32table_be[crc >> 30];
crc = (crc << 2) ^ crc32table_be[crc >> 30];
crc = (crc << 2) ^ crc32table_be[crc >> 30];
crc = (crc << 2) ^ crc32table_be[crc >> 30];
}
return crc;
# endif
}
#endif
EXPORT_SYMBOL(crc32_le);
EXPORT_SYMBOL(crc32_be);
#ifdef CONFIG_CRC32_SELFTEST
/* 4096 random bytes */
static u8 __attribute__((__aligned__(8))) test_buf[] =
{
0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30,
0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4,
0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60,
0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c,
0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4,
0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a,
0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a,
0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4,
0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9,
0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4,
0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca,
0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61,
0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e,
0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a,
0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f,
0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd,
0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c,
0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88,
0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53,
0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f,
0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4,
0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74,
0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60,
0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09,
0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07,
0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1,
0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f,
0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2,
0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0,
0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95,
0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22,
0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93,
0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86,
0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d,
0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40,
0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b,
0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35,
0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40,
0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63,
0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b,
0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8,
0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72,
0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86,
0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff,
0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed,
0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c,
0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed,
0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30,
0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99,
0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4,
0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80,
0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37,
0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04,
0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e,
0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd,
0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c,
0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09,
0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb,
0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b,
0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53,
0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b,
0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f,
0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff,
0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40,
0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6,
0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb,
0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73,
0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f,
0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4,
0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66,
0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1,
0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80,
0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f,
0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5,
0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7,
0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce,
0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff,
0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48,
0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26,
0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72,
0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88,
0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9,
0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc,
0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8,
0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09,
0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8,
0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c,
0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48,
0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d,
0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f,
0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae,
0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97,
0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8,
0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75,
0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc,
0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27,
0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf,
0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7,
0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0,
0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8,
0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c,
0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44,
0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54,
0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38,
0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f,
0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b,
0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7,
0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef,
0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e,
0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c,
0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c,
0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0,
0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37,
0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf,
0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e,
0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4,
0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60,
0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe,
0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61,
0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3,
0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe,
0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40,
0x5d, 0x1b, 0x7f, 0x39, 0xb5, 0x9c, 0x35, 0xec,
0x61, 0x15, 0x32, 0x32, 0xb8, 0x4e, 0x40, 0x9f,
0x17, 0x1f, 0x0a, 0x4d, 0xa9, 0x91, 0xef, 0xb7,
0xb0, 0xeb, 0xc2, 0x83, 0x9a, 0x6c, 0xd2, 0x79,
0x43, 0x78, 0x5e, 0x2f, 0xe5, 0xdd, 0x1a, 0x3c,
0x45, 0xab, 0x29, 0x40, 0x3a, 0x37, 0x5b, 0x6f,
0xd7, 0xfc, 0x48, 0x64, 0x3c, 0x49, 0xfb, 0x21,
0xbe, 0xc3, 0xff, 0x07, 0xfb, 0x17, 0xe9, 0xc9,
0x0c, 0x4c, 0x5c, 0x15, 0x9e, 0x8e, 0x22, 0x30,
0x0a, 0xde, 0x48, 0x7f, 0xdb, 0x0d, 0xd1, 0x2b,
0x87, 0x38, 0x9e, 0xcc, 0x5a, 0x01, 0x16, 0xee,
0x75, 0x49, 0x0d, 0x30, 0x01, 0x34, 0x6a, 0xb6,
0x9a, 0x5a, 0x2a, 0xec, 0xbb, 0x48, 0xac, 0xd3,
0x77, 0x83, 0xd8, 0x08, 0x86, 0x4f, 0x48, 0x09,
0x29, 0x41, 0x79, 0xa1, 0x03, 0x12, 0xc4, 0xcd,
0x90, 0x55, 0x47, 0x66, 0x74, 0x9a, 0xcc, 0x4f,
0x35, 0x8c, 0xd6, 0x98, 0xef, 0xeb, 0x45, 0xb9,
0x9a, 0x26, 0x2f, 0x39, 0xa5, 0x70, 0x6d, 0xfc,
0xb4, 0x51, 0xee, 0xf4, 0x9c, 0xe7, 0x38, 0x59,
0xad, 0xf4, 0xbc, 0x46, 0xff, 0x46, 0x8e, 0x60,
0x9c, 0xa3, 0x60, 0x1d, 0xf8, 0x26, 0x72, 0xf5,
0x72, 0x9d, 0x68, 0x80, 0x04, 0xf6, 0x0b, 0xa1,
0x0a, 0xd5, 0xa7, 0x82, 0x3a, 0x3e, 0x47, 0xa8,
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0x5a, 0x3f, 0x9d, 0xbf, 0xdb, 0xb4, 0x46, 0xea,
0x42, 0x01, 0x77, 0x23, 0x68, 0x95, 0xb6, 0x24,
0xb3, 0xa8, 0x6c, 0x28, 0x3b, 0x11, 0x40, 0x7e,
0x18, 0x65, 0x6d, 0xd8, 0x24, 0x42, 0x7d, 0x88,
0xc0, 0x52, 0xd9, 0x05, 0xe4, 0x95, 0x90, 0x87,
0x8c, 0xf4, 0xd0, 0x6b, 0xb9, 0x83, 0x99, 0x34,
0x6d, 0xfe, 0x54, 0x40, 0x94, 0x52, 0x21, 0x4f,
0x14, 0x25, 0xc5, 0xd6, 0x5e, 0x95, 0xdc, 0x0a,
0x2b, 0x89, 0x20, 0x11, 0x84, 0x48, 0xd6, 0x3a,
0xcd, 0x5c, 0x24, 0xad, 0x62, 0xe3, 0xb1, 0x93,
0x25, 0x8d, 0xcd, 0x7e, 0xfc, 0x27, 0xa3, 0x37,
0xfd, 0x84, 0xfc, 0x1b, 0xb2, 0xf1, 0x27, 0x38,
0x5a, 0xb7, 0xfc, 0xf2, 0xfa, 0x95, 0x66, 0xd4,
0xfb, 0xba, 0xa7, 0xd7, 0xa3, 0x72, 0x69, 0x48,
0x48, 0x8c, 0xeb, 0x28, 0x89, 0xfe, 0x33, 0x65,
0x5a, 0x36, 0x01, 0x7e, 0x06, 0x79, 0x0a, 0x09,
0x3b, 0x74, 0x11, 0x9a, 0x6e, 0xbf, 0xd4, 0x9e,
0x58, 0x90, 0x49, 0x4f, 0x4d, 0x08, 0xd4, 0xe5,
0x4a, 0x09, 0x21, 0xef, 0x8b, 0xb8, 0x74, 0x3b,
0x91, 0xdd, 0x36, 0x85, 0x60, 0x2d, 0xfa, 0xd4,
0x45, 0x7b, 0x45, 0x53, 0xf5, 0x47, 0x87, 0x7e,
0xa6, 0x37, 0xc8, 0x78, 0x7a, 0x68, 0x9d, 0x8d,
0x65, 0x2c, 0x0e, 0x91, 0x5c, 0xa2, 0x60, 0xf0,
0x8e, 0x3f, 0xe9, 0x1a, 0xcd, 0xaa, 0xe7, 0xd5,
0x77, 0x18, 0xaf, 0xc9, 0xbc, 0x18, 0xea, 0x48,
0x1b, 0xfb, 0x22, 0x48, 0x70, 0x16, 0x29, 0x9e,
0x5b, 0xc1, 0x2c, 0x66, 0x23, 0xbc, 0xf0, 0x1f,
0xef, 0xaf, 0xe4, 0xd6, 0x04, 0x19, 0x82, 0x7a,
0x0b, 0xba, 0x4b, 0x46, 0xb1, 0x6a, 0x85, 0x5d,
0xb4, 0x73, 0xd6, 0x21, 0xa1, 0x71, 0x60, 0x14,
0xee, 0x0a, 0x77, 0xc4, 0x66, 0x2e, 0xf9, 0x69,
0x30, 0xaf, 0x41, 0x0b, 0xc8, 0x83, 0x3c, 0x53,
0x99, 0x19, 0x27, 0x46, 0xf7, 0x41, 0x6e, 0x56,
0xdc, 0x94, 0x28, 0x67, 0x4e, 0xb7, 0x25, 0x48,
0x8a, 0xc2, 0xe0, 0x60, 0x96, 0xcc, 0x18, 0xf4,
0x84, 0xdd, 0xa7, 0x5e, 0x3e, 0x05, 0x0b, 0x26,
0x26, 0xb2, 0x5c, 0x1f, 0x57, 0x1a, 0x04, 0x7e,
0x6a, 0xe3, 0x2f, 0xb4, 0x35, 0xb6, 0x38, 0x40,
0x40, 0xcd, 0x6f, 0x87, 0x2e, 0xef, 0xa3, 0xd7,
0xa9, 0xc2, 0xe8, 0x0d, 0x27, 0xdf, 0x44, 0x62,
0x99, 0xa0, 0xfc, 0xcf, 0x81, 0x78, 0xcb, 0xfe,
0xe5, 0xa0, 0x03, 0x4e, 0x6c, 0xd7, 0xf4, 0xaf,
0x7a, 0xbb, 0x61, 0x82, 0xfe, 0x71, 0x89, 0xb2,
0x22, 0x7c, 0x8e, 0x83, 0x04, 0xce, 0xf6, 0x5d,
0x84, 0x8f, 0x95, 0x6a, 0x7f, 0xad, 0xfd, 0x32,
0x9c, 0x5e, 0xe4, 0x9c, 0x89, 0x60, 0x54, 0xaa,
0x96, 0x72, 0xd2, 0xd7, 0x36, 0x85, 0xa9, 0x45,
0xd2, 0x2a, 0xa1, 0x81, 0x49, 0x6f, 0x7e, 0x04,
0xfa, 0xe2, 0xfe, 0x90, 0x26, 0x77, 0x5a, 0x33,
0xb8, 0x04, 0x9a, 0x7a, 0xe6, 0x4c, 0x4f, 0xad,
0x72, 0x96, 0x08, 0x28, 0x58, 0x13, 0xf8, 0xc4,
0x1c, 0xf0, 0xc3, 0x45, 0x95, 0x49, 0x20, 0x8c,
0x9f, 0x39, 0x70, 0xe1, 0x77, 0xfe, 0xd5, 0x4b,
0xaf, 0x86, 0xda, 0xef, 0x22, 0x06, 0x83, 0x36,
0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa,
0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9,
0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28,
0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b,
0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03,
0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d,
0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff,
0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39,
0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b,
0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2,
0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34,
0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe,
0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0,
0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27,
0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86,
0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90,
0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03,
0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb,
0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57,
0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9,
0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5,
0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16,
0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5,
0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a,
0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d,
0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0,
0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f,
0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48,
0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1,
0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09,
0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51,
0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b,
0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf,
0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe,
0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad,
0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e,
0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57,
0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f,
0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef,
0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8,
0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69,
0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d,
0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59,
0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9,
0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d,
0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea,
0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56,
0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4,
0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8,
0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78,
0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f,
0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4,
0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91,
0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f,
0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c,
0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57,
0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4,
0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23,
0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17,
0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66,
0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39,
0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36,
0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00,
0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7,
0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60,
0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c,
0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e,
0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7,
0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a,
0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d,
0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37,
0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82,
0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8,
0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e,
0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85,
0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98,
0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22,
0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7,
0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49,
0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33,
0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc,
0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8,
0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f,
0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3,
0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98,
0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c,
0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6,
0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc,
0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d,
};
/* 100 test cases */
static struct crc_test {
u32 crc; /* random starting crc */
u32 start; /* random 6 bit offset in buf */
u32 length; /* random 11 bit length of test */
u32 crc_le; /* expected crc32_le result */
u32 crc_be; /* expected crc32_be result */
} test[] =
{
{0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1},
{0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad},
{0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f},
{0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a},
{0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2},
{0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793},
{0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed},
{0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35},
{0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2},
{0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10},
{0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb},
{0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0},
{0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb},
{0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed},
{0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591},
{0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67},
{0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd},
{0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a},
{0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b},
{0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f},
{0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d},
{0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a},
{0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97},
{0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2},
{0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138},
{0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032},
{0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f},
{0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f},
{0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32},
{0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef},
{0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0},
{0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59},
{0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4},
{0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c},
{0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51},
{0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11},
{0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659},
{0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af},
{0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99},
{0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b},
{0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521},
{0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3},
{0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d},
{0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f},
{0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b},
{0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0},
{0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195},
{0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d},
{0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4},
{0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3},
{0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643},
{0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10},
{0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d},
{0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5},
{0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b},
{0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee},
{0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14},
{0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a},
{0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b},
{0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3},
{0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826},
{0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06},
{0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35},
{0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801},
{0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2},
{0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d},
{0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c},
{0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba},
{0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5},
{0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b},
{0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178},
{0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3},
{0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605},
{0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1},
{0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9},
{0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78},
{0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9},
{0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd},
{0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab},
{0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb},
{0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77},
{0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da},
{0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39},
{0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16},
{0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208},
{0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e},
{0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5},
{0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892},
{0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db},
{0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43},
{0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac},
{0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7},
{0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2},
{0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2},
{0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640},
{0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f},
{0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99},
{0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7},
{0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499},
{0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a},
};
#include <linux/time.h>
static int __init crc32_init(void)
{
int i;
int errors = 0;
int bytes = 0;
struct timespec start, stop;
u64 nsec;
unsigned long flags;
/* keep static to prevent cache warming code from
* getting eliminated by the compiler */
static u32 crc;
/* pre-warm the cache */
for (i = 0; i < 100; i++) {
bytes += 2*test[i].length;
crc ^= crc32_le(test[i].crc, test_buf +
test[i].start, test[i].length);
crc ^= crc32_be(test[i].crc, test_buf +
test[i].start, test[i].length);
}
/* reduce OS noise */
local_irq_save(flags);
local_irq_disable();
getnstimeofday(&start);
for (i = 0; i < 100; i++) {
if (test[i].crc_le != crc32_le(test[i].crc, test_buf +
test[i].start, test[i].length))
errors++;
if (test[i].crc_be != crc32_be(test[i].crc, test_buf +
test[i].start, test[i].length))
errors++;
}
getnstimeofday(&stop);
local_irq_restore(flags);
local_irq_enable();
nsec = stop.tv_nsec - start.tv_nsec +
1000000000 * (stop.tv_sec - start.tv_sec);
pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
CRC_LE_BITS, CRC_BE_BITS);
if (errors)
pr_warn("crc32: %d self tests failed\n", errors);
else {
pr_info("crc32: self tests passed, processed %d bytes in %lld nsec\n",
bytes, nsec);
}
return 0;
}
static void __exit crc32_exit(void)
{
}
module_init(crc32_init);
module_exit(crc32_exit);
#endif /* CONFIG_CRC32_SELFTEST */