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Move secp256k1_fe_one to field.h

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This makes secp256k1_fe_one part of field.h's interface, and allows other modules to appropriately access the constant.
This commit is contained in:
Russell O'Connor 2022-01-19 09:53:02 -05:00
parent a1102b1219
commit c9da1baad1
3 changed files with 3 additions and 4 deletions
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2
src/field.h
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@ -32,6 +32,8 @@
#error "Please select wide multiplication implementation" #error "Please select wide multiplication implementation"
#endif #endif
static const secp256k1_fe secp256k1_fe_one = SECP256K1_FE_CONST(0, 0, 0, 0, 0, 0, 0, 1);
/** Normalize a field element. This brings the field element to a canonical representation, reduces /** Normalize a field element. This brings the field element to a canonical representation, reduces
* its magnitude to 1, and reduces it modulo field size `p`. * its magnitude to 1, and reduces it modulo field size `p`.
*/ */

2
src/field_impl.h
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@ -135,6 +135,4 @@ static int secp256k1_fe_sqrt(secp256k1_fe *r, const secp256k1_fe *a) {
return secp256k1_fe_equal(&t1, a); return secp256k1_fe_equal(&t1, a);
} }
static const secp256k1_fe secp256k1_fe_one = SECP256K1_FE_CONST(0, 0, 0, 0, 0, 0, 0, 1);
#endif /* SECP256K1_FIELD_IMPL_H */ #endif /* SECP256K1_FIELD_IMPL_H */

3
src/group_impl.h
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@ -494,7 +494,6 @@ static void secp256k1_gej_add_zinv_var(secp256k1_gej *r, const secp256k1_gej *a,
static void secp256k1_gej_add_ge(secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_ge *b) { static void secp256k1_gej_add_ge(secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_ge *b) {
/* Operations: 7 mul, 5 sqr, 4 normalize, 21 mul_int/add/negate/cmov */ /* Operations: 7 mul, 5 sqr, 4 normalize, 21 mul_int/add/negate/cmov */
static const secp256k1_fe fe_1 = SECP256K1_FE_CONST(0, 0, 0, 0, 0, 0, 0, 1);
secp256k1_fe zz, u1, u2, s1, s2, t, tt, m, n, q, rr; secp256k1_fe zz, u1, u2, s1, s2, t, tt, m, n, q, rr;
secp256k1_fe m_alt, rr_alt; secp256k1_fe m_alt, rr_alt;
int infinity, degenerate; int infinity, degenerate;
@ -610,7 +609,7 @@ static void secp256k1_gej_add_ge(secp256k1_gej *r, const secp256k1_gej *a, const
/** In case a->infinity == 1, replace r with (b->x, b->y, 1). */ /** In case a->infinity == 1, replace r with (b->x, b->y, 1). */
secp256k1_fe_cmov(&r->x, &b->x, a->infinity); secp256k1_fe_cmov(&r->x, &b->x, a->infinity);
secp256k1_fe_cmov(&r->y, &b->y, a->infinity); secp256k1_fe_cmov(&r->y, &b->y, a->infinity);
secp256k1_fe_cmov(&r->z, &fe_1, a->infinity); secp256k1_fe_cmov(&r->z, &secp256k1_fe_one, a->infinity);
r->infinity = infinity; r->infinity = infinity;
} }