frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Make secp256k1_i128_check_pow2 support -(2^n)

Browse Source
This commit is contained in:
Pieter Wuille
2022-12-10 15:13:43 -05:00
parent cbd2555934
commit 5fffb2c7af
5 changed files with 43 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/int128_native_impl.h
View File

@@ -84,9 +84,10 @@ static SECP256K1_INLINE int secp256k1_i128_eq_var(const secp256k1_int128 *a, con
return *a == *b;
}
static SECP256K1_INLINE int secp256k1_i128_check_pow2(const secp256k1_int128 *r, unsigned int n) {
static SECP256K1_INLINE int secp256k1_i128_check_pow2(const secp256k1_int128 *r, unsigned int n, int sign) {
VERIFY_CHECK(n < 127);
return (*r == (int128_t)1 << n);
VERIFY_CHECK(sign == 1 || sign == -1);
return (*r == (int128_t)((uint128_t)sign << n));
}
#endif