From fa910966ede699f90b2760d7a11ac0ef5dbda029 Mon Sep 17 00:00:00 2001 From: obscuren Date: Tue, 3 Mar 2015 11:18:50 +0100 Subject: Redone rlp --- vm/vm.go | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) (limited to 'vm') diff --git a/vm/vm.go b/vm/vm.go index 9f8d5e8df..b9c7f73a8 100644 --- a/vm/vm.go +++ b/vm/vm.go @@ -844,7 +844,7 @@ func baseCheck(op OpCode, stack *Stack, gas *big.Int) { func toWordSize(size *big.Int) *big.Int { tmp := new(big.Int) - tmp.Add(tmp, u256(31)) + tmp.Add(size, u256(31)) tmp.Div(tmp, u256(32)) return tmp } @@ -951,9 +951,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo } if newMemSize.Cmp(ethutil.Big0) > 0 { - newMemSize.Add(newMemSize, u256(31)) - newMemSize.Div(newMemSize, u256(32)) - newMemSize.Mul(newMemSize, u256(32)) + newMemSize = toWordSize(newMemSize) if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 { //memGasUsage := new(big.Int).Sub(newMemSize, u256(int64(mem.Len()))) @@ -961,15 +959,14 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo //memGasUsage.Div(memGasUsage, u256(32)) //Old: full_memory_gas_cost = W + floor(W*W / 1024), W = words in memory + pow := new(big.Int).Exp(oldSize, ethutil.Big2, Zero) oldSize := toWordSize(big.NewInt(int64(mem.Len()))) linCoef := new(big.Int).Mul(oldSize, GasMemWord) - pow := new(big.Int) - pow.Exp(oldSize, ethutil.Big2, Zero) quadCoef := new(big.Int).Div(pow, GasQuadCoeffDenom) oldTotalFee := new(big.Int).Add(linCoef, quadCoef) - linCoef = new(big.Int).Mul(newMemSize, GasMemWord) pow.Exp(newMemSize, ethutil.Big2, Zero) + linCoef = new(big.Int).Mul(newMemSize, GasMemWord) quadCoef = new(big.Int).Div(pow, GasQuadCoeffDenom) newTotalFee := new(big.Int).Add(linCoef, quadCoef) -- cgit