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Implementation of ADDMOD & MULMOD with gmp

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Paweł Bylica 2015-01-19 15:39:59 +01:00
parent 939e94a101
commit a2822a37bf
1 changed files with 26 additions and 14 deletions
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40
libevmjit/Arith256.cpp
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@ -275,24 +275,36 @@ extern "C"
EXPORT void arith_mulmod(i256* _arg1, i256* _arg2, i256* _arg3, i256* o_result)
{
auto arg1 = llvm2eth(*_arg1);
auto arg2 = llvm2eth(*_arg2);
auto arg3 = llvm2eth(*_arg3);
if (arg3 != 0)
*o_result = eth2llvm(u256((bigint(arg1) * bigint(arg2)) % arg3));
else
*o_result = {};
*o_result = {};
if (isZero(_arg3))
return;
mpz_t x{nLimbs, countLimbs(_arg1), reinterpret_cast<mp_limb_t*>(_arg1)};
mpz_t y{nLimbs, countLimbs(_arg2), reinterpret_cast<mp_limb_t*>(_arg2)};
mpz_t m{nLimbs, countLimbs(_arg3), reinterpret_cast<mp_limb_t*>(_arg3)};
mpz_t z{nLimbs, 0, reinterpret_cast<mp_limb_t*>(o_result)};
static mp_limb_t p_limbs[nLimbs * 2] = {};
static mpz_t p{nLimbs * 2, 0, &p_limbs[0]};
mpz_mul(p, x, y);
mpz_tdiv_r(z, p, m);
}
EXPORT void arith_addmod(i256* _arg1, i256* _arg2, i256* _arg3, i256* o_result)
{
auto arg1 = llvm2eth(*_arg1);
auto arg2 = llvm2eth(*_arg2);
auto arg3 = llvm2eth(*_arg3);
if (arg3 != 0)
*o_result = eth2llvm(u256((bigint(arg1) + bigint(arg2)) % arg3));
else
*o_result = {};
*o_result = {};
if (isZero(_arg3))
return;
mpz_t x{nLimbs, countLimbs(_arg1), reinterpret_cast<mp_limb_t*>(_arg1)};
mpz_t y{nLimbs, countLimbs(_arg2), reinterpret_cast<mp_limb_t*>(_arg2)};
mpz_t m{nLimbs, countLimbs(_arg3), reinterpret_cast<mp_limb_t*>(_arg3)};
mpz_t z{nLimbs, 0, reinterpret_cast<mp_limb_t*>(o_result)};
static mp_limb_t s_limbs[nLimbs + 1] = {};
static mpz_t s{nLimbs + 1, 0, &s_limbs[0]};
mpz_add(s, x, y);
mpz_tdiv_r(z, s, m);
}
}