--- Log opened Tue Nov 07 00:00:18 2023
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14:19 < bitcoin-git> [secp256k1] real-or-random pushed 8 commits to master: https://github.com/bitcoin-core/secp256k1/compare/1f1bb78b7fc2...40f50d0fbd3c
14:19 < bitcoin-git> secp256k1/master 2140da9 Pieter Wuille: Add secp256k1_scalar_half for halving scalars (+ tests/benchmarks).
14:19 < bitcoin-git> secp256k1/master ba523be Pieter Wuille: make SECP256K1_SCALAR_CONST reduce modulo exhaustive group order
14:19 < bitcoin-git> secp256k1/master 4d16e90 Pieter Wuille: Signed-digit based ecmult_const algorithm
14:19 < bitcoin-git> [secp256k1] real-or-random merged pull request #1184: Signed-digit based ecmult_const algorithm (master...202212_sd_ecmult_const) https://github.com/bitcoin-core/secp256k1/pull/1184
14:26 < sipa> \o/
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15:49 < real_or_random> :)
15:49 < real_or_random> I've reported the GCC ICE at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112430
15:58 < bitcoin-git> [secp256k1] real-or-random opened pull request #1440: CI TEST (master...231106-ci) https://github.com/bitcoin-core/secp256k1/pull/1440
16:03 < bitcoin-git> [secp256k1] real-or-random closed pull request #1440: CI TEST (master...231106-ci) https://github.com/bitcoin-core/secp256k1/pull/1440
16:27 < real_or_random> hm I wasn't aware that there's an RFC for hashing to curves.. it even includes secp256k1 -- https://www.rfc-editor.org/rfc/rfc9380.html#name-suites-for-secp256k1
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16:35 < Guest4378> Hi there
16:35 < Guest4378> I have a question about field arithmetic.
16:35 < Guest4378> In secp256k1, it uses 5x52 arithmetic but I think it's efficient to perform with 4x64.https://github.com/bitcoin-core/secp256k1/blob/master/src/field_5x52.h#L12
16:35 < Guest4378> I would like to know the reason to use 5x52.
16:35 < Guest4378> I would appreciate it if you could confirm.
16:35 < Guest4378> Thank you.
16:49 < real_or_random> Guest4378:   5x52 is faster than a naive 4x64 because you need to do fewer modular reductions
16:50 < real_or_random> e.g., you can perform a few additions before the 64 bit integer will overflow. only then you'll need to do a reduction
16:52 < real_or_random> (a clever 5x64 can probably beat our current implementation but we only have some work-in-progress code for this idea https://github.com/bitcoin-core/secp256k1/pull/967 )
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--- Log closed Wed Nov 08 00:00:19 2023