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Fix for select point from table in ec_nistp scalar_mul #1719

Merged
merged 1 commit into from
Jul 24, 2024
Merged

Fix for select point from table in ec_nistp scalar_mul #1719

merged 1 commit into from
Jul 24, 2024

Commits on Jul 23, 2024

  1. Small fix for select point from table in ec_nistp scalar_mul 

    Previous change unified and simplified selecting a point from table
by using constant_time_select_entry_from_table_8 function.
Unfortunatelly, on x86 this function is significantly slower than
constant_time_select_entry_from_table_w. This commit fixes the
performance regression.

Measured on Intel(R) Xeon(R) Platinum 8488C:
P-384 scalar_mul from 4091 to 5461 ops/s,
P-521 scalar_mul from 2520 to 3731 ops/s.
    dkostic committed Jul 23, 2024
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