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core/vm: avoid unnecessary use of big.Int:BitLen()

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This commit is contained in:
Martin Holst Swende 2019-03-11 20:38:50 +01:00
parent 81a2fb8c4e
commit fd4bee4f21
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GPG key ID: 683B438C05A5DDF0
3 changed files with 4 additions and 4 deletions
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4
core/vm/gas.go
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@ -43,11 +43,11 @@ func callGas(gasTable params.GasTable, availableGas, base uint64, callCost *big.
// If the bit length exceeds 64 bit we know that the newly calculated "gas" for EIP150
// is smaller than the requested amount. Therefor we return the new gas instead
// of returning an error.
if callCost.BitLen() > 64 || gas < callCost.Uint64() {
if !callCost.IsUint64() || gas < callCost.Uint64() {
return gas, nil
}
}
if callCost.BitLen() > 64 {
if !callCost.IsUint64() {
return 0, errGasUintOverflow
}

2
core/vm/instructions.go
View file

@ -467,7 +467,7 @@ func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, contract *Contrac
)
defer interpreter.intPool.put(memOffset, dataOffset, length, end)
if end.BitLen() > 64 || uint64(len(interpreter.returnData)) < end.Uint64() {
if !end.IsUint64() || uint64(len(interpreter.returnData)) < end.Uint64() {
return nil, errReturnDataOutOfBounds
}
memory.Set(memOffset.Uint64(), length.Uint64(), interpreter.returnData[dataOffset.Uint64():end.Uint64()])

2
core/vm/interpreter.go
View file

@ -214,7 +214,7 @@ func (in *EVMInterpreter) Run(contract *Contract, input []byte, readOnly bool) (
// for a call operation is the value. Transferring value from one
// account to the others means the state is modified and should also
// return with an error.
if operation.writes || (op == CALL && stack.Back(2).BitLen() > 0) {
if operation.writes || (op == CALL && stack.Back(2).Sign() != 0) {
return nil, errWriteProtection
}
}