sharpetronics/zstd
1
0
Fork 0
mirror of https://github.com/facebook/zstd.git synced 2025-10-08 00:04:02 -04:00
Code Issues Projects Releases Wiki Activity

Re-Order Operations for Slightly Better Performance

Browse Source
This commit is contained in:
W. Felix Handte 2021-08-18 12:47:48 -04:00
parent bc768bccc0
commit 387840af79
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
lib/compress/zstd_fast.c
View File

@ -331,27 +331,27 @@ _start: /* Requires: ip0 */
goto _match;
}
/* load match for ip[1] */
if (idx0 >= prefixStartIndex) {
mval = MEM_read32(base + idx0);
} else {
mval = MEM_read32(ip0) ^ 1; /* guaranteed to not match. */
}
/* check match at ip[0] */
if (MEM_read32(ip0) == mval) {
/* found a match! */
goto _offset;
}
/* load next rval */
rval = MEM_read32(ip3 - rep_offset1);
/* load match for ip[1] */
if (idx1 >= prefixStartIndex) {
mval = MEM_read32(base + idx1);
} else {
mval = MEM_read32(ip1) ^ 1; /* guaranteed to not match. */
}
/* hash ip[3] */
hash3 = ZSTD_hashPtr(ip3, hlog, mls);
/* lookup ip[2] */
idx2 = hashTable[hash2];
/* hash ip[3] */
hash3 = ZSTD_hashPtr(ip3, hlog, mls);
/* load next rval */
rval = MEM_read32(ip3 - rep_offset1);
/* advance to next positions */
{