commit 9b4d8bcf8dc97d7edad3dc1443b317ecb5a0a254
Author: Tim Burke <tim.burke@gmail.com>
Date: Thu Jul 6 00:08:45 2017 +0000
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
diff --git a/src/utils/chksum/crc32.c b/src/utils/chksum/crc32.c
index 6710dd7..6bc844d 100644
--- a/src/utils/chksum/crc32.c
+++ b/src/utils/chksum/crc32.c
@@ -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
-