github.com/myafeier/go-ethereum@v1.6.8-0.20170719123245-3e0dbe0eaa72/core/vm/memory_table.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package vm
    18  
    19  import (
    20  	"math/big"
    21  
    22  	"github.com/ethereum/go-ethereum/common/math"
    23  )
    24  
    25  func memorySha3(stack *Stack) *big.Int {
    26  	return calcMemSize(stack.Back(0), stack.Back(1))
    27  }
    28  
    29  func memoryCalldataCopy(stack *Stack) *big.Int {
    30  	return calcMemSize(stack.Back(0), stack.Back(2))
    31  }
    32  
    33  func memoryCodeCopy(stack *Stack) *big.Int {
    34  	return calcMemSize(stack.Back(0), stack.Back(2))
    35  }
    36  
    37  func memoryExtCodeCopy(stack *Stack) *big.Int {
    38  	return calcMemSize(stack.Back(1), stack.Back(3))
    39  }
    40  
    41  func memoryMLoad(stack *Stack) *big.Int {
    42  	return calcMemSize(stack.Back(0), big.NewInt(32))
    43  }
    44  
    45  func memoryMStore8(stack *Stack) *big.Int {
    46  	return calcMemSize(stack.Back(0), big.NewInt(1))
    47  }
    48  
    49  func memoryMStore(stack *Stack) *big.Int {
    50  	return calcMemSize(stack.Back(0), big.NewInt(32))
    51  }
    52  
    53  func memoryCreate(stack *Stack) *big.Int {
    54  	return calcMemSize(stack.Back(1), stack.Back(2))
    55  }
    56  
    57  func memoryCall(stack *Stack) *big.Int {
    58  	x := calcMemSize(stack.Back(5), stack.Back(6))
    59  	y := calcMemSize(stack.Back(3), stack.Back(4))
    60  
    61  	return math.BigMax(x, y)
    62  }
    63  
    64  func memoryCallCode(stack *Stack) *big.Int {
    65  	x := calcMemSize(stack.Back(5), stack.Back(6))
    66  	y := calcMemSize(stack.Back(3), stack.Back(4))
    67  
    68  	return math.BigMax(x, y)
    69  }
    70  func memoryDelegateCall(stack *Stack) *big.Int {
    71  	x := calcMemSize(stack.Back(4), stack.Back(5))
    72  	y := calcMemSize(stack.Back(2), stack.Back(3))
    73  
    74  	return math.BigMax(x, y)
    75  }
    76  
    77  func memoryReturn(stack *Stack) *big.Int {
    78  	return calcMemSize(stack.Back(0), stack.Back(1))
    79  }
    80  
    81  func memoryLog(stack *Stack) *big.Int {
    82  	mSize, mStart := stack.Back(1), stack.Back(0)
    83  	return calcMemSize(mStart, mSize)
    84  }