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| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-06-20 16:54:13 +0100 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-09-11 13:38:03 +0000 |
| commit | 15697177183db06b31a73d45a4e8406eaaa4cf5b (patch) | |
| tree | 1a91babdef27d47d6ccfe38a79546ac35cb6be1c | |
| parent | Add Pippenger cache and limit Straus cache size (diff) | |
| download | monero-15697177183db06b31a73d45a4e8406eaaa4cf5b.tar.xz | |
bulletproofs: speed up a few multiplies using existing Hi cache
| -rw-r--r-- | src/ringct/bulletproofs.cc | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/ringct/bulletproofs.cc b/src/ringct/bulletproofs.cc index 4eb6d6d5b..bc7e15f35 100644 --- a/src/ringct/bulletproofs.cc +++ b/src/ringct/bulletproofs.cc @@ -111,6 +111,15 @@ static void addKeys_acc_p3(ge_p3 *acc_p3, const rct::key &a, const rct::key &poi ge_p1p1_to_p3(acc_p3, &p1); } +static rct::key scalarmultKey(const ge_p3 &P, const rct::key &a) +{ + ge_p2 R; + ge_scalarmult(&R, a.bytes, &P); + rct::key aP; + ge_tobytes(aP.bytes, &R); + return aP; +} + static rct::key get_exponent(const rct::key &base, size_t idx) { static const std::string salt("bulletproof"); @@ -578,7 +587,7 @@ Bulletproof bulletproof_PROVE(const rct::key &sv, const rct::key &gamma) for (size_t i = 0; i < N; ++i) { Gprime[i] = Gi[i]; - Hprime[i] = scalarmultKey(Hi[i], yinvpow); + Hprime[i] = scalarmultKey(Hi_p3[i], yinvpow); sc_mul(yinvpow.bytes, yinvpow.bytes, yinv.bytes); aprime[i] = l[i]; bprime[i] = r[i]; @@ -828,7 +837,7 @@ Bulletproof bulletproof_PROVE(const rct::keyV &sv, const rct::keyV &gamma) for (size_t i = 0; i < MN; ++i) { Gprime[i] = Gi[i]; - Hprime[i] = scalarmultKey(Hi[i], yinvpow); + Hprime[i] = scalarmultKey(Hi_p3[i], yinvpow); sc_mul(yinvpow.bytes, yinvpow.bytes, yinv.bytes); aprime[i] = l[i]; bprime[i] = r[i]; |