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big: Add ilog2.

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Jeroen van Rijn
2021-09-01 19:13:47 +02:00
parent 7d7ed6b95f
commit fd83cbf40b
3 changed files with 7 additions and 11 deletions
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core/math/big/private.odin
+1 -1
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@@ -1437,7 +1437,7 @@ _private_int_factorial_binary_split :: proc(res: ^Int, n: int, allocator := cont
internal_one(inner, false) or_return;
internal_one(outer, false) or_return;
bits_used := int(_DIGIT_TYPE_BITS - intrinsics.count_leading_zeros(n));
bits_used := ilog2(n);
for i := bits_used; i >= 0; i -= 1 {
start := (n >> (uint(i) + 1)) + 1 | 1;