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big: Add internal_int_exponent_mod_fast.

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This commit is contained in:
Jeroen van Rijn
2021-09-01 19:13:47 +02:00
parent 65a15e9c06
commit 2110778040
4 changed files with 302 additions and 17 deletions
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core/math/big/private.odin
+1 -4
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@@ -1730,9 +1730,6 @@ _private_int_log :: proc(a: ^Int, base: DIGIT, allocator := context.allocator) -
return;
}
/*
Computes xR**-1 == x (mod N) via Montgomery Reduction.
This is an optimized implementation of `internal_montgomery_reduce`
@@ -1753,7 +1750,7 @@ _private_montgomery_reduce_comba :: proc(x, n: ^Int, rho: DIGIT, allocator := co
/*
Grow `x` as required.
*/
internal_grow(x, n.used + 1) or_return;
internal_grow(x, n.used + 1) or_return;
/*
First we have to get the digits of the input into an array of double precision words W[...]