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bulletproofs: some more speedup

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moneromooo-monero 2018-08-08 15:01:41 +00:00
parent a621d6c8b4
commit 484155d043
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 19 additions and 15 deletions
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34
src/ringct/bulletproofs.cc
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@ -423,6 +423,7 @@ Bulletproof bulletproof_PROVE(const rct::key &sv, const rct::key &gamma)
rct::key V; rct::key V;
rct::keyV aL(N), aR(N); rct::keyV aL(N), aR(N);
rct::keyV aL8(N), aR8(N);
rct::key tmp, tmp2; rct::key tmp, tmp2;
PERF_TIMER_START_BP(PROVE_v); PERF_TIMER_START_BP(PROVE_v);
@ -438,12 +439,15 @@ Bulletproof bulletproof_PROVE(const rct::key &sv, const rct::key &gamma)
if (sv[i/8] & (((uint64_t)1)<<(i%8))) if (sv[i/8] & (((uint64_t)1)<<(i%8)))
{ {
aL[i] = rct::identity(); aL[i] = rct::identity();
aL8[i] = INV_EIGHT;
aR[i] = aR8[i] = rct::zero();
} }
else else
{ {
aL[i] = rct::zero(); aL[i] = aL8[i] = rct::zero();
aR[i] = MINUS_ONE;
aR8[i] = MINUS_INV_EIGHT;
} }
sc_sub(aR[i].bytes, aL[i].bytes, rct::identity().bytes);
} }
PERF_TIMER_STOP(PROVE_aLaR); PERF_TIMER_STOP(PROVE_aLaR);
@ -469,10 +473,10 @@ try_again:
PERF_TIMER_START_BP(PROVE_step1); PERF_TIMER_START_BP(PROVE_step1);
// PAPER LINES 38-39 // PAPER LINES 38-39
rct::key alpha = rct::skGen(); rct::key alpha = rct::skGen();
rct::key ve = vector_exponent(aL, aR); rct::key ve = vector_exponent(aL8, aR8);
rct::key A; rct::key A;
rct::addKeys(A, ve, rct::scalarmultBase(alpha)); sc_mul(tmp.bytes, alpha.bytes, INV_EIGHT.bytes);
A = rct::scalarmultKey(A, INV_EIGHT); rct::addKeys(A, ve, rct::scalarmultBase(tmp));
// PAPER LINES 40-42 // PAPER LINES 40-42
rct::keyV sL = rct::skvGen(N), sR = rct::skvGen(N); rct::keyV sL = rct::skvGen(N), sR = rct::skvGen(N);
@ -711,6 +715,7 @@ Bulletproof bulletproof_PROVE(const rct::keyV &sv, const rct::keyV &gamma)
rct::keyV V(sv.size()); rct::keyV V(sv.size());
rct::keyV aL(MN), aR(MN); rct::keyV aL(MN), aR(MN);
rct::keyV aL8(MN), aR8(MN);
rct::key tmp, tmp2; rct::key tmp, tmp2;
PERF_TIMER_START_BP(PROVE_v); PERF_TIMER_START_BP(PROVE_v);
@ -728,19 +733,18 @@ Bulletproof bulletproof_PROVE(const rct::keyV &sv, const rct::keyV &gamma)
{ {
for (size_t i = N; i-- > 0; ) for (size_t i = N; i-- > 0; )
{ {
if (j >= sv.size()) if (j < sv.size() && (sv[j][i/8] & (((uint64_t)1)<<(i%8))))
{
aL[j*N+i] = rct::zero();
}
else if (sv[j][i/8] & (((uint64_t)1)<<(i%8)))
{ {
aL[j*N+i] = rct::identity(); aL[j*N+i] = rct::identity();
aL8[j*N+i] = INV_EIGHT;
aR[j*N+i] = aR8[j*N+i] = rct::zero();
} }
else else
{ {
aL[j*N+i] = rct::zero(); aL[j*N+i] = aL8[j*N+i] = rct::zero();
aR[j*N+i] = MINUS_ONE;
aR8[j*N+i] = MINUS_INV_EIGHT;
} }
sc_sub(aR[j*N+i].bytes, aL[j*N+i].bytes, rct::identity().bytes);
} }
} }
PERF_TIMER_STOP(PROVE_aLaR); PERF_TIMER_STOP(PROVE_aLaR);
@ -771,10 +775,10 @@ try_again:
PERF_TIMER_START_BP(PROVE_step1); PERF_TIMER_START_BP(PROVE_step1);
// PAPER LINES 38-39 // PAPER LINES 38-39
rct::key alpha = rct::skGen(); rct::key alpha = rct::skGen();
rct::key ve = vector_exponent(aL, aR); rct::key ve = vector_exponent(aL8, aR8);
rct::key A; rct::key A;
rct::addKeys(A, ve, rct::scalarmultBase(alpha)); sc_mul(tmp.bytes, alpha.bytes, INV_EIGHT.bytes);
A = rct::scalarmultKey(A, INV_EIGHT); rct::addKeys(A, ve, rct::scalarmultBase(tmp));
// PAPER LINES 40-42 // PAPER LINES 40-42
rct::keyV sL = rct::skvGen(MN), sR = rct::skvGen(MN); rct::keyV sL = rct::skvGen(MN), sR = rct::skvGen(MN);