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memory_table.go
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memory_table.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mm
import (
"math/big"
"github.com/33cn/plugin/plugin/dapp/evm/executor/vm/common"
)
// 本文件中定义各种操作下计算内存大小的逻辑
type (
// MemorySizeFunc 计算所需内存大小
MemorySizeFunc func(*Stack) *big.Int
)
// MemorySha3 sha3计算所需内存大小
func MemorySha3(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(1))
}
//MemoryCallDataCopy callDataCopy所需内存大小
func MemoryCallDataCopy(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(2))
}
//MemoryReturnDataCopy returnDataCopy所需内存大小
func MemoryReturnDataCopy(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(2))
}
//MemoryCodeCopy codeCopy所需内存大小
func MemoryCodeCopy(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(2))
}
//MemoryExtCodeCopy extCodeCopy所需内存大小
func MemoryExtCodeCopy(stack *Stack) *big.Int {
return calcMemSize(stack.Back(1), stack.Back(3))
}
//MemoryMLoad mload所需内存大小
func MemoryMLoad(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), big.NewInt(32))
}
//MemoryMStore8 mstore8所需内存大小
func MemoryMStore8(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), big.NewInt(1))
}
//MemoryMStore mstore所需内存大小
func MemoryMStore(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), big.NewInt(32))
}
//MemoryCreate create所需内存大小
func MemoryCreate(stack *Stack) *big.Int {
return calcMemSize(stack.Back(1), stack.Back(2))
}
//MemoryCall call所需内存大小
func MemoryCall(stack *Stack) *big.Int {
x := calcMemSize(stack.Back(5), stack.Back(6))
y := calcMemSize(stack.Back(3), stack.Back(4))
return common.BigMax(x, y)
}
//MemoryDelegateCall delegateCall所需内存大小
func MemoryDelegateCall(stack *Stack) *big.Int {
x := calcMemSize(stack.Back(4), stack.Back(5))
y := calcMemSize(stack.Back(2), stack.Back(3))
return common.BigMax(x, y)
}
//MemoryStaticCall staticCall所需内存大小
func MemoryStaticCall(stack *Stack) *big.Int {
x := calcMemSize(stack.Back(4), stack.Back(5))
y := calcMemSize(stack.Back(2), stack.Back(3))
return common.BigMax(x, y)
}
//MemoryReturn return所需内存大小
func MemoryReturn(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(1))
}
//MemoryRevert revert所需内存大小
func MemoryRevert(stack *Stack) *big.Int {
return calcMemSize(stack.Back(0), stack.Back(1))
}
//MemoryLog log所需内存大小
func MemoryLog(stack *Stack) *big.Int {
mSize, mStart := stack.Back(1), stack.Back(0)
return calcMemSize(mStart, mSize)
}