--- Day changed Mon Jun 25 2018
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11:21 < roconnor> by my estimation, secp256k1_fe_mul should be able to handle upto magnitude 10 inputs; but maybe I'm not seeing the worst-case overflow.
11:22 < gmaxwell> roconnor: with which field implementation? they're different.
11:23 < roconnor> in 10x26
11:23 < sipa> roconnor: 5x52 can handle even larger magnitudes
11:23 < sipa> but that doesn't necessarily translate to higher level group code that can use that
11:24 < gmaxwell> IIRC the group logic that needed a mul by 7 did not work without an extra normalization with 10x26.
11:24 < roconnor> sure.  I guess i'm asking if the magintude 8 check is based on what you believe the 10x26 secp256k1_fe_mul can handle, or what you beleive is sufficent for who calls it.
11:28 < sipa> oh, it's certainly possible it can correctly deal with more
11:35 < andytoshi> it would be very interesting if we could avoid some normalizations in the mul-by-7 code. is that the new group addition that i tried to introduce a couple times because it had a lower mul/sqr count, but which benchmarked to be slower because of normalization?
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14:56 < gmaxwell> andytoshi: yes
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