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Abstract out verify logic for fe_cmov

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This commit is contained in:
Pieter Wuille
2022-01-28 18:45:42 -05:00
parent be82bd8e03
commit 1e6894bdd7
4 changed files with 22 additions and 15 deletions
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13
src/field_impl.h
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@@ -323,6 +323,19 @@ SECP256K1_INLINE static void secp256k1_fe_sqr(secp256k1_fe *r, const secp256k1_f
r->normalized = 0;
secp256k1_fe_verify(r);
}
static void secp256k1_fe_impl_cmov(secp256k1_fe *r, const secp256k1_fe *a, int flag);
SECP256K1_INLINE static void secp256k1_fe_cmov(secp256k1_fe *r, const secp256k1_fe *a, int flag) {
VERIFY_CHECK(flag == 0 || flag == 1);
secp256k1_fe_verify(a);
secp256k1_fe_verify(r);
secp256k1_fe_impl_cmov(r, a, flag);
if (flag) {
r->magnitude = a->magnitude;
r->normalized = a->normalized;
}
secp256k1_fe_verify(r);
}
#endif /* defined(VERIFY) */
#endif /* SECP256K1_FIELD_IMPL_H */