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 }