Add prefetch to zippy compress

PiperOrigin-RevId: 518358512
2023-03-21 13:05:25 -07:00 · 2023-03-21 13:05:25 -07:00 · 92f18e66fd
parent f603a02008
commit 92f18e66fd
2 changed files with 2 additions and 6 deletions
--- a/snappy-internal.h
+++ b/snappy-internal.h
@ -258,6 +258,8 @@ static inline std::pair<size_t, bool> FindMatchLength(const char* s1,
      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
  // time until we find a 64-bit block that doesn't match; then we find
--- a/snappy.cc
+++ b/snappy.cc
@ -68,12 +68,6 @@
 #include <arm_acle.h>
 #endif

-#if defined(__GNUC__)
-#define SNAPPY_PREFETCH(ptr) __builtin_prefetch(ptr, 0, 3)
-#else
-#define SNAPPY_PREFETCH(ptr) (void)(ptr)
-#endif
-
 #include <algorithm>
 #include <array>
 #include <cstddef>