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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-07-03 09:34:53 -07:00
parent c3ac079272
commit 4a94d13c4d
4 changed files with 66 additions and 6 deletions
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44
src/math/bigfix/u256.cpp
View file

@ -1,8 +1,52 @@
#include "math/bigfix/u256.h"
#include "math/bigfix/Hacl_Bignum256.h"
u256::u256(uint64_t n) {
m_num[0] = n;
m_num[1] = 0;
m_num[2] = 0;
m_num[3] = 0;
}
u256::u256(uint64_t const* v) {
std::uninitialized_copy(v, v + sizeof(*this), m_num);
}
u256 u256::operator*(u256 const& other) const {
uint64_t result[8];
Hacl_Bignum256_mul(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result);
return u256(result);
}
u256 u256::operator+(u256 const& other) const {
u256 result;
Hacl_Bignum256_add(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result.m_num);
return result;
}
u256 u256::operator-(u256 const& other) const {
u256 result;
Hacl_Bignum256_sub(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result.m_num);
return result;
}
u256& u256::operator*=(u256 const& other) {
uint64_t result[8];
Hacl_Bignum256_add(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result);
std::uninitialized_copy(m_num, m_num + sizeof(*this), result);
return *this;
}
u256& u256::operator+=(u256 const& other) {
uint64_t result[4];
Hacl_Bignum256_add(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result);
std::uninitialized_copy(m_num, m_num + sizeof(*this), result);
return *this;
}
u256& u256::operator-=(u256 const& other) {
uint64_t result[4];
Hacl_Bignum256_sub(const_cast<uint64_t*>(m_num), const_cast<uint64_t*>(other.m_num), result);
std::uninitialized_copy(m_num, m_num + sizeof(*this), result);
return *this;
}

6
src/math/bigfix/u256.h
View file

@ -7,9 +7,11 @@ class u256 {
public:
u256() { memset(this, 0, sizeof(*this)); }
u256(uint64_t n);
u256(uint64_t const* v) { memcpy(m_num, v, sizeof(*this)); }
u256(uint64_t const* v);
u256 operator*(u256 const& other) const;
u256 operator+(u256 const& other) const;
u256 operator-(u256 const& other) const;
u256& operator+=(u256 const& other);
u256& operator*=(u256 const& other);
u256& operator-=(u256 const& other);
};