nimbus-eth1/nimbus/evm/interpreter/op_handlers/oph_push.nim

86 lines
2.6 KiB
Nim

# Nimbus
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
## EVM Opcode Handlers: Push Operations
## ====================================
##
import
../../code_stream,
../../stack,
../op_codes,
./oph_defs,
./oph_gen_handlers,
sequtils,
stint,
strformat
# ------------------------------------------------------------------------------
# Private helpers
# ------------------------------------------------------------------------------
proc fnName(n: int): string {.compileTime.} =
&"push{n}Op"
proc opName(n: int): string {.compileTime.} =
&"Push{n}"
proc fnInfo(n: int): string {.compileTime.} =
var blurb = case n
of 1: "byte"
else: &"{n} bytes"
&"Push {blurb} on the stack"
proc pushImpl(k: var Vm2Ctx; n: int) =
k.cpt.stack.push:
k.cpt.code.readVmWord(n)
const
inxRange = toSeq(1 .. 32)
# ------------------------------------------------------------------------------
# Private, op handlers implementation
# ------------------------------------------------------------------------------
genOphHandlers fnName, fnInfo, inxRange, pushImpl
# ------------------------------------------------------------------------------
# Public, op exec table entries
# ------------------------------------------------------------------------------
genOphList fnName, fnInfo, inxRange, "vm2OpExecPush", opName
# Push0 needs to be slightly different because it's only available after
# Shanghai (EIP-3855). But it still seems like it belongs in this file.
# (Alternatively, we could make genOphList accept some more information
# about which opcodes are for which forks, but that seems uglier than
# just adding Push0 here as a special case.)
const
push0Op: Vm2OpFn = proc (k: var Vm2Ctx) =
## 0x5f, push 0 onto the stack
k.cpt.stack.push(0)
vm2OpExecPushZero*: seq[Vm2OpExec] = @[
(opCode: Push0, ## 0x5f, push 0 onto the stack
forks: Vm2OpShanghaiAndLater,
name: "Push0",
info: "Push 0 on the stack",
exec: (prep: vm2OpIgnore,
run: push0Op,
post: vm2OpIgnore))]
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------