github.com/MetalBlockchain/subnet-evm@v0.4.9/core/vm/stack_table.go (about)

     1  // (c) 2019-2020, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2017 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package vm
    28  
    29  import (
    30  	"github.com/MetalBlockchain/subnet-evm/params"
    31  )
    32  
    33  func minSwapStack(n int) int {
    34  	return minStack(n, n)
    35  }
    36  func maxSwapStack(n int) int {
    37  	return maxStack(n, n)
    38  }
    39  
    40  func minDupStack(n int) int {
    41  	return minStack(n, n+1)
    42  }
    43  func maxDupStack(n int) int {
    44  	return maxStack(n, n+1)
    45  }
    46  
    47  func maxStack(pop, push int) int {
    48  	return int(params.StackLimit) + pop - push
    49  }
    50  func minStack(pops, push int) int {
    51  	return pops
    52  }