diff options
| -rw-r--r-- | src/ringct/bulletproofs.cc | 8 | ||||
| -rw-r--r-- | src/ringct/multiexp.cc | 36 |
2 files changed, 30 insertions, 14 deletions
diff --git a/src/ringct/bulletproofs.cc b/src/ringct/bulletproofs.cc index f1b821978..4e1c940d1 100644 --- a/src/ringct/bulletproofs.cc +++ b/src/ringct/bulletproofs.cc @@ -48,7 +48,7 @@ extern "C" #define PERF_TIMER_START_BP(x) PERF_TIMER_START_UNIT(x, 1000000) -#define STRAUS_SIZE_LIMIT 128 +#define STRAUS_SIZE_LIMIT 232 #define PIPPENGER_SIZE_LIMIT 0 namespace rct @@ -77,11 +77,11 @@ static inline rct::key multiexp(const std::vector<MultiexpData> &data, size_t Hi { if (HiGi_size > 0) { - static_assert(128 <= STRAUS_SIZE_LIMIT, "Straus in precalc mode can only be calculated till STRAUS_SIZE_LIMIT"); - return HiGi_size <= 128 && data.size() == HiGi_size ? straus(data, straus_HiGi_cache, 0) : pippenger(data, pippenger_HiGi_cache, HiGi_size, get_pippenger_c(data.size())); + static_assert(232 <= STRAUS_SIZE_LIMIT, "Straus in precalc mode can only be calculated till STRAUS_SIZE_LIMIT"); + return HiGi_size <= 232 && data.size() == HiGi_size ? straus(data, straus_HiGi_cache, 0) : pippenger(data, pippenger_HiGi_cache, HiGi_size, get_pippenger_c(data.size())); } else - return data.size() <= 64 ? straus(data, NULL, 0) : pippenger(data, NULL, 0, get_pippenger_c(data.size())); + return data.size() <= 95 ? straus(data, NULL, 0) : pippenger(data, NULL, 0, get_pippenger_c(data.size())); } static inline bool is_reduced(const rct::key &scalar) diff --git a/src/ringct/multiexp.cc b/src/ringct/multiexp.cc index 178f92267..85b1dfed4 100644 --- a/src/ringct/multiexp.cc +++ b/src/ringct/multiexp.cc @@ -79,6 +79,25 @@ extern "C" // Best/cached Straus Straus Straus Straus Straus Straus Straus Straus Pip Pip Pip Pip // Best/uncached Straus Straus Straus Straus Straus Straus Pip Pip Pip Pip Pip Pip +// New timings: +// Pippenger: +// 2/1 always +// 3/2 at ~13 +// 4/3 at ~29 +// 5/4 at ~83 +// 6/5 < 200 +// 7/6 at ~470 +// 8/7 at ~1180 +// 9/8 at ~2290 +// Cached Pippenger: +// 6/5 < 200 +// 7/6 at 460 +// 8/7 at 1180 +// 9/8 at 2300 +// +// Cached Straus/Pippenger cross at 232 +// + namespace rct { @@ -543,16 +562,13 @@ skipfirst: size_t get_pippenger_c(size_t N) { -// uncached: 2:1, 4:2, 8:2, 16:3, 32:4, 64:4, 128:5, 256:6, 512:7, 1024:7, 2048:8, 4096:9 -// cached: 2:1, 4:2, 8:2, 16:3, 32:4, 64:4, 128:5, 256:6, 512:7, 1024:7, 2048:8, 4096:9 - if (N <= 2) return 1; - if (N <= 8) return 2; - if (N <= 16) return 3; - if (N <= 64) return 4; - if (N <= 128) return 5; - if (N <= 256) return 6; - if (N <= 1024) return 7; - if (N <= 2048) return 8; + if (N <= 13) return 2; + if (N <= 29) return 3; + if (N <= 83) return 4; + if (N <= 185) return 5; + if (N <= 465) return 6; + if (N <= 1180) return 7; + if (N <= 2295) return 8; return 9; } |