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Use secp256k1_fe_equal_var in secp256k1_fe_sqrt_var.

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In theory this should be faster, since secp256k1_fe_equal_var is able to
 shortcut the normalization.  On x86_64 the improvement appears to be in
 the noise for me.  At least it makes the code cleaner.
This commit is contained in:
Gregory Maxwell
2014-12-31 05:56:00 -08:00
parent 7767b4d25b
commit 70ae0d2851
1 changed files with 1 additions and 4 deletions
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5
src/field_impl.h
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@ -135,10 +135,7 @@ static int secp256k1_fe_sqrt_var(secp256k1_fe_t *r, const secp256k1_fe_t *a) {
/* Check that a square root was actually calculated */
secp256k1_fe_sqr(&t1, r);
secp256k1_fe_negate(&t1, &t1, 1);
secp256k1_fe_add(&t1, a);
secp256k1_fe_normalize_var(&t1);
return secp256k1_fe_is_zero(&t1);
return secp256k1_fe_equal_var(&t1, a);
}
static void secp256k1_fe_inv(secp256k1_fe_t *r, const secp256k1_fe_t *a) {