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SDIV & SMOD fixed

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This commit is contained in:
Paweł Bylica 2014-12-04 20:31:56 +01:00
parent 58d2bfbd8a
commit 5362d5056d
1 changed files with 25 additions and 3 deletions
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28
libevmjit/Arith256.cpp
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@ -96,6 +96,29 @@ llvm::Value* Arith256::mulmod(llvm::Value* _arg1, llvm::Value* _arg2, llvm::Valu
return ternaryOp(m_mulmod, _arg1, _arg2, _arg3); return ternaryOp(m_mulmod, _arg1, _arg2, _arg3);
} }
namespace
{
using s256 = boost::multiprecision::int256_t;
inline s256 u2s(u256 _u)
{
static const bigint c_end = (bigint)1 << 256;
static const u256 c_send = (u256)1 << 255;
if (_u < c_send)
return (s256)_u;
else
return (s256)-(c_end - _u);
}
inline u256 s2u(s256 _u)
{
static const bigint c_end = (bigint)1 << 256;
if (_u >= 0)
return (u256)_u;
else
return (u256)(c_end + _u);
}
}
} }
} }
@ -106,7 +129,6 @@ extern "C"
{ {
using namespace dev::eth::jit; using namespace dev::eth::jit;
using s256 = boost::multiprecision::int256_t;
EXPORT void arith_mul(i256* _arg1, i256* _arg2, i256* o_result) EXPORT void arith_mul(i256* _arg1, i256* _arg2, i256* o_result)
{ {
@ -133,14 +155,14 @@ extern "C"
{ {
auto arg1 = llvm2eth(*_arg1); auto arg1 = llvm2eth(*_arg1);
auto arg2 = llvm2eth(*_arg2); auto arg2 = llvm2eth(*_arg2);
*o_result = eth2llvm(arg2 == 0 ? arg2 : (arg1.convert_to<s256>() / arg2.convert_to<s256>()).convert_to<u256>()); *o_result = eth2llvm(arg2 == 0 ? arg2 : s2u(u2s(arg1) / u2s(arg2)));
} }
EXPORT void arith_smod(i256* _arg1, i256* _arg2, i256* o_result) EXPORT void arith_smod(i256* _arg1, i256* _arg2, i256* o_result)
{ {
auto arg1 = llvm2eth(*_arg1); auto arg1 = llvm2eth(*_arg1);
auto arg2 = llvm2eth(*_arg2); auto arg2 = llvm2eth(*_arg2);
*o_result = eth2llvm(arg2 == 0 ? arg2 : (arg1.convert_to<s256>() % arg2.convert_to<s256>()).convert_to<u256>()); *o_result = eth2llvm(arg2 == 0 ? arg2 : s2u(u2s(arg1) % u2s(arg2)));
} }
EXPORT void arith_exp(i256* _arg1, i256* _arg2, i256* o_result) EXPORT void arith_exp(i256* _arg1, i256* _arg2, i256* o_result)