diff options
Diffstat (limited to 'snappy.cc')
-rw-r--r-- | snappy.cc | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -69,6 +69,12 @@ #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> @@ -1192,6 +1198,8 @@ std::pair<const uint8_t*, ptrdiff_t> DecompressBranchless( // The throughput is limited by instructions, unrolling the inner loop // twice reduces the amount of instructions checking limits and also // leads to reduced mov's. + + SNAPPY_PREFETCH(ip+128); for (int i = 0; i < 2; i++) { const uint8_t* old_ip = ip; assert(tag == ip[-1]); |