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Fixed implementation of EXP opcode (wrong results when exponent >= 2^32)

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Giacomo Tazzari 2014-08-11 11:06:32 +02:00
parent b3e2070903
commit 17cb91aa35
1 changed files with 1 additions and 1 deletions
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2
Assembly.cpp
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@ -230,7 +230,7 @@ Assembly& Assembly::optimise(bool _enable)
{ Instruction::SDIV, [](u256 a, u256 b)->u256{return s2u(u2s(a) / u2s(b));} },
{ Instruction::MOD, [](u256 a, u256 b)->u256{return a % b;} },
{ Instruction::SMOD, [](u256 a, u256 b)->u256{return s2u(u2s(a) % u2s(b));} },
{ Instruction::EXP, [](u256 a, u256 b)->u256{return boost::multiprecision::pow(a, (unsigned)b);} },
{ Instruction::EXP, [](u256 a, u256 b)->u256{return (u256)boost::multiprecision::powm((bigint)a, (bigint)b, bigint(2) << 256);} },
{ Instruction::LT, [](u256 a, u256 b)->u256{return a < b ? 1 : 0;} },
{ Instruction::GT, [](u256 a, u256 b)->u256{return a > b ? 1 : 0;} },
{ Instruction::SLT, [](u256 a, u256 b)->u256{return u2s(a) < u2s(b) ? 1 : 0;} },