Mercurial > crc32

comparison crc32c.c @ 3:6483683ac857 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
*: add profiling code too; expand x86 to use all eight XMM registers basically ported verbatim from the assembly
author Paper <paper@tflc.us>
date Mon, 09 Feb 2026 21:30:30 -0500
parents 422835bc1aca
children
comparison
equal deleted inserted replaced
2:ead9f84d11db 3:6483683ac857
1 #include "crc32i.h" 1 #include "crc32i.h"
2 2
3 uint32_t crc32c_r(uint32_t crc, const unsigned char *message, size_t sz) 3 uint32_t crc32c_r(uint32_t crc, const unsigned char *message, size_t sz)
4 { 4 {
5 size_t i; 5 while (sz--)
6 6 crc = (crc >> 8) ^ crc32_tab[(crc ^ *message++) & 0xFF];
7 for (i = 0; i < sz; i++)
8 crc = (crc >> 8) ^ crc32_tab[(crc ^ message[i]) & 0xFF];
9 7
10 return crc; 8 return crc;
11 } 9 }