Stop pretending to support SSE4-optimized CRC-32C

It isn't the CRC we want, and we never used it anyway. While we may
define INTEL_SSE41 or INTEL_SSE42 if CPU seems to support it, we've
never defined INTEL_SSE4.

Change-Id: I04e1dd6458ccde58a0a2f3f4d6947569a31e9697
Partial-Bug: 1666320
This commit is contained in:
Tim Burke 2017-07-06 00:08:45 +00:00
parent 24038b3588
commit 9b4d8bcf8d
1 changed files with 0 additions and 29 deletions

View File

@ -42,30 +42,6 @@
#include <sys/param.h>
#if defined(INTEL_SSE4)
#include <nmmintrin.h>
int
crc32(int crc, const void *buf, size_t size)
{
unsigned long long *current = (unsigned long long*)buf;
unsigned char *current_char;
crc = crc ^ ~0U;
while(size >= 8) {
crc = _mm_crc32_u64(crc, *current++);
size -= 8;
}
current_char = (unsigned char*)current;
while (size--) {
crc = _mm_crc32_u8(crc, *current_char++);
}
return crc ^ ~0U;
}
#else
static int crc32_tab[] = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
@ -112,9 +88,6 @@ static int crc32_tab[] = {
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
// Use same polynomial as Intel's SSE4 instruction!
#define POLY_CRC_32 0x11EDC6F41
int
crc32(int crc, const void *buf, size_t size)
{
@ -128,5 +101,3 @@ crc32(int crc, const void *buf, size_t size)
return crc ^ ~0U;
}
#endif