mirror of https://github.com/bitcoin/bitcoin
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
#ifndef SECP256K1_INT128_NATIVE_IMPL_H
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#define SECP256K1_INT128_NATIVE_IMPL_H
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#include "int128.h"
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static SECP256K1_INLINE void secp256k1_u128_load(secp256k1_uint128 *r, uint64_t hi, uint64_t lo) {
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*r = (((uint128_t)hi) << 64) + lo;
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}
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static SECP256K1_INLINE void secp256k1_u128_mul(secp256k1_uint128 *r, uint64_t a, uint64_t b) {
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*r = (uint128_t)a * b;
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}
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static SECP256K1_INLINE void secp256k1_u128_accum_mul(secp256k1_uint128 *r, uint64_t a, uint64_t b) {
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*r += (uint128_t)a * b;
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}
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static SECP256K1_INLINE void secp256k1_u128_accum_u64(secp256k1_uint128 *r, uint64_t a) {
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*r += a;
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}
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static SECP256K1_INLINE void secp256k1_u128_rshift(secp256k1_uint128 *r, unsigned int n) {
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VERIFY_CHECK(n < 128);
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*r >>= n;
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}
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static SECP256K1_INLINE uint64_t secp256k1_u128_to_u64(const secp256k1_uint128 *a) {
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return (uint64_t)(*a);
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}
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static SECP256K1_INLINE uint64_t secp256k1_u128_hi_u64(const secp256k1_uint128 *a) {
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return (uint64_t)(*a >> 64);
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}
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static SECP256K1_INLINE void secp256k1_u128_from_u64(secp256k1_uint128 *r, uint64_t a) {
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*r = a;
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}
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static SECP256K1_INLINE int secp256k1_u128_check_bits(const secp256k1_uint128 *r, unsigned int n) {
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VERIFY_CHECK(n < 128);
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return (*r >> n == 0);
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}
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static SECP256K1_INLINE void secp256k1_i128_load(secp256k1_int128 *r, int64_t hi, uint64_t lo) {
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*r = (((uint128_t)(uint64_t)hi) << 64) + lo;
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}
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static SECP256K1_INLINE void secp256k1_i128_mul(secp256k1_int128 *r, int64_t a, int64_t b) {
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*r = (int128_t)a * b;
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}
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static SECP256K1_INLINE void secp256k1_i128_accum_mul(secp256k1_int128 *r, int64_t a, int64_t b) {
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int128_t ab = (int128_t)a * b;
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VERIFY_CHECK(0 <= ab ? *r <= INT128_MAX - ab : INT128_MIN - ab <= *r);
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*r += ab;
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}
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static SECP256K1_INLINE void secp256k1_i128_det(secp256k1_int128 *r, int64_t a, int64_t b, int64_t c, int64_t d) {
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int128_t ad = (int128_t)a * d;
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int128_t bc = (int128_t)b * c;
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VERIFY_CHECK(0 <= bc ? INT128_MIN + bc <= ad : ad <= INT128_MAX + bc);
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*r = ad - bc;
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}
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static SECP256K1_INLINE void secp256k1_i128_rshift(secp256k1_int128 *r, unsigned int n) {
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VERIFY_CHECK(n < 128);
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*r >>= n;
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}
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static SECP256K1_INLINE int64_t secp256k1_i128_to_i64(const secp256k1_int128 *a) {
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return *a;
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}
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static SECP256K1_INLINE void secp256k1_i128_from_i64(secp256k1_int128 *r, int64_t a) {
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*r = a;
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}
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static SECP256K1_INLINE int secp256k1_i128_eq_var(const secp256k1_int128 *a, const secp256k1_int128 *b) {
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return *a == *b;
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}
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static SECP256K1_INLINE int secp256k1_i128_check_pow2(const secp256k1_int128 *r, unsigned int n) {
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VERIFY_CHECK(n < 127);
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return (*r == (int128_t)1 << n);
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}
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#endif
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