65 lines
1.9 KiB
Nim
65 lines
1.9 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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## EVM Opcode Handlers: Swap Operations
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## ====================================
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##
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{.push raises: [].}
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import
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../../evm_errors,
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../../stack,
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../op_codes,
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./oph_defs,
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./oph_gen_handlers,
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sequtils
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# ------------------------------------------------------------------------------
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# Private, names & settings
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# ------------------------------------------------------------------------------
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proc fnName(n: int): string {.compileTime.} =
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"swap" & $n & "Op"
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proc opName(n: int): string {.compileTime.} =
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"Swap" & $n
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proc fnInfo(n: int): string {.compileTime.} =
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var blurb = case n+1
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of 1: "first"
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of 2: "second"
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of 3: "third"
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else: $(n+1) & "th"
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"Exchange first and " & blurb & " stack items"
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template swapImpl(cpt: VmCpt; n: static int): EvmResultVoid =
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cpt.stack.swap(n)
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const
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inxRange = toSeq(1 .. 16)
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# ------------------------------------------------------------------------------
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# Private, op handlers implementation
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# ------------------------------------------------------------------------------
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genOphHandlers fnName, fnInfo, inxRange, swapImpl
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# ------------------------------------------------------------------------------
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# Public, op exec table entries
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# ------------------------------------------------------------------------------
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genOphList fnName, fnInfo, inxRange, "VmOpExecSwap", opName
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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