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field: remove secp256k1_fe_equal_var

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`fe_equal_var` hits a fast path only when the inputs are unequal, which is
uncommon among its callers (public key parsing, ECDSA verify).
This commit is contained in:
siv2r
2022-01-31 04:43:57 +05:30
parent bb4efd6404
commit 54058d16fe
7 changed files with 31 additions and 50 deletions
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6
src/field.h
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@@ -176,12 +176,6 @@ static int secp256k1_fe_is_odd(const secp256k1_fe *a);
*/
static int secp256k1_fe_equal(const secp256k1_fe *a, const secp256k1_fe *b);
/** Determine whether two field elements are equal, without constant-time guarantee.
*
* Identical in behavior to secp256k1_fe_equal, but not constant time in either a or b.
*/
static int secp256k1_fe_equal_var(const secp256k1_fe *a, const secp256k1_fe *b);
/** Compare the values represented by 2 field elements, without constant-time guarantee.
*
* On input, a and b must be valid normalized field elements.