fabi/Snappy
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add prefetch to zippy compress

Browse Source 
PiperOrigin-RevId: 518358512
This commit is contained in:
Ilya Tokar
2023-03-21 13:05:25 -07:00
committed by Victor Costan
parent f603a02008
commit 92f18e66fd
2 changed files with 2 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
snappy-internal.h
View File

@@ -258,6 +258,8 @@ static inline std::pair<size_t, bool> FindMatchLength(const char* s1,
s2 += 8; s2 += 8;
} }
} }
SNAPPY_PREFETCH(s1 + 64);
SNAPPY_PREFETCH(s2 + 64);
// Find out how long the match is. We loop over the data 64 bits at a // Find out how long the match is. We loop over the data 64 bits at a
// time until we find a 64-bit block that doesn't match; then we find // time until we find a 64-bit block that doesn't match; then we find

6
snappy.cc
View File

@@ -68,12 +68,6 @@
#include <arm_acle.h> #include <arm_acle.h>
#endif #endif
#if defined(__GNUC__)
#define SNAPPY_PREFETCH(ptr) __builtin_prefetch(ptr, 0, 3)
#else
#define SNAPPY_PREFETCH(ptr) (void)(ptr)
#endif
#include <algorithm> #include <algorithm>
#include <array> #include <array>
#include <cstddef> #include <cstddef>