#!/usr/bin/env python3
#
# Copyright 2018 WebAssembly Community Group participants
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import sys

instructions = [
    ("unreachable",    "makeUnreachable()"),
    ("nop",            "makeNop()"),
    ("block",          "makeBlock(s)"),
    ("loop",           "makeLoop(s)"),
    ("if",             "makeIf(s)"),
    ("then",           "makeThenOrElse(s)"),
    ("else",           "makeThenOrElse(s)"),
    ("br",             "makeBreak(s)"),
    ("br_if",          "makeBreak(s)"),
    ("br_table",       "makeBreakTable(s)"),
    ("return",         "makeReturn(s)"),
    ("call",           "makeCall(s, /*isReturn=*/false)"),
    ("call_indirect",  "makeCallIndirect(s, /*isReturn=*/false)"),
    ("return_call",    "makeCall(s, /*isReturn=*/true)"),
    ("return_call_indirect", "makeCallIndirect(s, /*isReturn=*/true)"),
    ("drop",           "makeDrop(s)"),
    ("select",         "makeSelect(s)"),
    ("local.get",      "makeLocalGet(s)"),
    ("local.set",      "makeLocalSet(s)"),
    ("local.tee",      "makeLocalTee(s)"),
    ("global.get",     "makeGlobalGet(s)"),
    ("global.set",     "makeGlobalSet(s)"),
    ("memory.init",    "makeMemoryInit(s)"),
    ("data.drop",      "makeDataDrop(s)"),
    ("memory.copy",    "makeMemoryCopy(s)"),
    ("memory.fill",    "makeMemoryFill(s)"),
    ("push",           "makePush(s)"),
    ("i32.pop",        "makePop(Type::i32)"),
    ("i64.pop",        "makePop(Type::i64)"),
    ("f32.pop",        "makePop(Type::f32)"),
    ("f64.pop",        "makePop(Type::f64)"),
    ("v128.pop",       "makePop(Type::v128)"),
    ("funcref.pop",    "makePop(Type::funcref)"),
    ("anyref.pop",     "makePop(Type::anyref)"),
    ("nullref.pop",    "makePop(Type::nullref)"),
    ("exnref.pop",     "makePop(Type::exnref)"),
    ("i32.load",       "makeLoad(s, Type::i32, /*isAtomic=*/false)"),
    ("i64.load",       "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("f32.load",       "makeLoad(s, Type::f32, /*isAtomic=*/false)"),
    ("f64.load",       "makeLoad(s, Type::f64, /*isAtomic=*/false)"),
    ("i32.load8_s",    "makeLoad(s, Type::i32, /*isAtomic=*/false)"),
    ("i32.load8_u",    "makeLoad(s, Type::i32, /*isAtomic=*/false)"),
    ("i32.load16_s",   "makeLoad(s, Type::i32, /*isAtomic=*/false)"),
    ("i32.load16_u",   "makeLoad(s, Type::i32, /*isAtomic=*/false)"),
    ("i64.load8_s",    "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.load8_u",    "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.load16_s",   "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.load16_u",   "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.load32_s",   "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.load32_u",   "makeLoad(s, Type::i64, /*isAtomic=*/false)"),
    ("i32.store",      "makeStore(s, Type::i32, /*isAtomic=*/false)"),
    ("i64.store",      "makeStore(s, Type::i64, /*isAtomic=*/false)"),
    ("f32.store",      "makeStore(s, Type::f32, /*isAtomic=*/false)"),
    ("f64.store",      "makeStore(s, Type::f64, /*isAtomic=*/false)"),
    ("i32.store8",     "makeStore(s, Type::i32, /*isAtomic=*/false)"),
    ("i32.store16",    "makeStore(s, Type::i32, /*isAtomic=*/false)"),
    ("i64.store8",     "makeStore(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.store16",    "makeStore(s, Type::i64, /*isAtomic=*/false)"),
    ("i64.store32",    "makeStore(s, Type::i64, /*isAtomic=*/false)"),
    ("memory.size",    "makeHost(s, HostOp::MemorySize)"),
    ("memory.grow",    "makeHost(s, HostOp::MemoryGrow)"),
    ("i32.const",      "makeConst(s, Type::i32)"),
    ("i64.const",      "makeConst(s, Type::i64)"),
    ("f32.const",      "makeConst(s, Type::f32)"),
    ("f64.const",      "makeConst(s, Type::f64)"),
    ("i32.eqz",        "makeUnary(s, UnaryOp::EqZInt32)"),
    ("i32.eq",         "makeBinary(s, BinaryOp::EqInt32)"),
    ("i32.ne",         "makeBinary(s, BinaryOp::NeInt32)"),
    ("i32.lt_s",       "makeBinary(s, BinaryOp::LtSInt32)"),
    ("i32.lt_u",       "makeBinary(s, BinaryOp::LtUInt32)"),
    ("i32.gt_s",       "makeBinary(s, BinaryOp::GtSInt32)"),
    ("i32.gt_u",       "makeBinary(s, BinaryOp::GtUInt32)"),
    ("i32.le_s",       "makeBinary(s, BinaryOp::LeSInt32)"),
    ("i32.le_u",       "makeBinary(s, BinaryOp::LeUInt32)"),
    ("i32.ge_s",       "makeBinary(s, BinaryOp::GeSInt32)"),
    ("i32.ge_u",       "makeBinary(s, BinaryOp::GeUInt32)"),
    ("i64.eqz",        "makeUnary(s, UnaryOp::EqZInt64)"),
    ("i64.eq",         "makeBinary(s, BinaryOp::EqInt64)"),
    ("i64.ne",         "makeBinary(s, BinaryOp::NeInt64)"),
    ("i64.lt_s",       "makeBinary(s, BinaryOp::LtSInt64)"),
    ("i64.lt_u",       "makeBinary(s, BinaryOp::LtUInt64)"),
    ("i64.gt_s",       "makeBinary(s, BinaryOp::GtSInt64)"),
    ("i64.gt_u",       "makeBinary(s, BinaryOp::GtUInt64)"),
    ("i64.le_s",       "makeBinary(s, BinaryOp::LeSInt64)"),
    ("i64.le_u",       "makeBinary(s, BinaryOp::LeUInt64)"),
    ("i64.ge_s",       "makeBinary(s, BinaryOp::GeSInt64)"),
    ("i64.ge_u",       "makeBinary(s, BinaryOp::GeUInt64)"),
    ("f32.eq",         "makeBinary(s, BinaryOp::EqFloat32)"),
    ("f32.ne",         "makeBinary(s, BinaryOp::NeFloat32)"),
    ("f32.lt",         "makeBinary(s, BinaryOp::LtFloat32)"),
    ("f32.gt",         "makeBinary(s, BinaryOp::GtFloat32)"),
    ("f32.le",         "makeBinary(s, BinaryOp::LeFloat32)"),
    ("f32.ge",         "makeBinary(s, BinaryOp::GeFloat32)"),
    ("f64.eq",         "makeBinary(s, BinaryOp::EqFloat64)"),
    ("f64.ne",         "makeBinary(s, BinaryOp::NeFloat64)"),
    ("f64.lt",         "makeBinary(s, BinaryOp::LtFloat64)"),
    ("f64.gt",         "makeBinary(s, BinaryOp::GtFloat64)"),
    ("f64.le",         "makeBinary(s, BinaryOp::LeFloat64)"),
    ("f64.ge",         "makeBinary(s, BinaryOp::GeFloat64)"),
    ("i32.clz",        "makeUnary(s, UnaryOp::ClzInt32)"),
    ("i32.ctz",        "makeUnary(s, UnaryOp::CtzInt32)"),
    ("i32.popcnt",     "makeUnary(s, UnaryOp::PopcntInt32)"),
    ("i32.add",        "makeBinary(s, BinaryOp::AddInt32)"),
    ("i32.sub",        "makeBinary(s, BinaryOp::SubInt32)"),
    ("i32.mul",        "makeBinary(s, BinaryOp::MulInt32)"),
    ("i32.div_s",      "makeBinary(s, BinaryOp::DivSInt32)"),
    ("i32.div_u",      "makeBinary(s, BinaryOp::DivUInt32)"),
    ("i32.rem_s",      "makeBinary(s, BinaryOp::RemSInt32)"),
    ("i32.rem_u",      "makeBinary(s, BinaryOp::RemUInt32)"),
    ("i32.and",        "makeBinary(s, BinaryOp::AndInt32)"),
    ("i32.or",         "makeBinary(s, BinaryOp::OrInt32)"),
    ("i32.xor",        "makeBinary(s, BinaryOp::XorInt32)"),
    ("i32.shl",        "makeBinary(s, BinaryOp::ShlInt32)"),
    ("i32.shr_s",      "makeBinary(s, BinaryOp::ShrSInt32)"),
    ("i32.shr_u",      "makeBinary(s, BinaryOp::ShrUInt32)"),
    ("i32.rotl",       "makeBinary(s, BinaryOp::RotLInt32)"),
    ("i32.rotr",       "makeBinary(s, BinaryOp::RotRInt32)"),
    ("i64.clz",        "makeUnary(s, UnaryOp::ClzInt64)"),
    ("i64.ctz",        "makeUnary(s, UnaryOp::CtzInt64)"),
    ("i64.popcnt",     "makeUnary(s, UnaryOp::PopcntInt64)"),
    ("i64.add",        "makeBinary(s, BinaryOp::AddInt64)"),
    ("i64.sub",        "makeBinary(s, BinaryOp::SubInt64)"),
    ("i64.mul",        "makeBinary(s, BinaryOp::MulInt64)"),
    ("i64.div_s",      "makeBinary(s, BinaryOp::DivSInt64)"),
    ("i64.div_u",      "makeBinary(s, BinaryOp::DivUInt64)"),
    ("i64.rem_s",      "makeBinary(s, BinaryOp::RemSInt64)"),
    ("i64.rem_u",      "makeBinary(s, BinaryOp::RemUInt64)"),
    ("i64.and",        "makeBinary(s, BinaryOp::AndInt64)"),
    ("i64.or",         "makeBinary(s, BinaryOp::OrInt64)"),
    ("i64.xor",        "makeBinary(s, BinaryOp::XorInt64)"),
    ("i64.shl",        "makeBinary(s, BinaryOp::ShlInt64)"),
    ("i64.shr_s",      "makeBinary(s, BinaryOp::ShrSInt64)"),
    ("i64.shr_u",      "makeBinary(s, BinaryOp::ShrUInt64)"),
    ("i64.rotl",       "makeBinary(s, BinaryOp::RotLInt64)"),
    ("i64.rotr",       "makeBinary(s, BinaryOp::RotRInt64)"),
    ("f32.abs",        "makeUnary(s, UnaryOp::AbsFloat32)"),
    ("f32.neg",        "makeUnary(s, UnaryOp::NegFloat32)"),
    ("f32.ceil",       "makeUnary(s, UnaryOp::CeilFloat32)"),
    ("f32.floor",      "makeUnary(s, UnaryOp::FloorFloat32)"),
    ("f32.trunc",      "makeUnary(s, UnaryOp::TruncFloat32)"),
    ("f32.nearest",    "makeUnary(s, UnaryOp::NearestFloat32)"),
    ("f32.sqrt",       "makeUnary(s, UnaryOp::SqrtFloat32)"),
    ("f32.add",        "makeBinary(s, BinaryOp::AddFloat32)"),
    ("f32.sub",        "makeBinary(s, BinaryOp::SubFloat32)"),
    ("f32.mul",        "makeBinary(s, BinaryOp::MulFloat32)"),
    ("f32.div",        "makeBinary(s, BinaryOp::DivFloat32)"),
    ("f32.min",        "makeBinary(s, BinaryOp::MinFloat32)"),
    ("f32.max",        "makeBinary(s, BinaryOp::MaxFloat32)"),
    ("f32.copysign",   "makeBinary(s, BinaryOp::CopySignFloat32)"),
    ("f64.abs",        "makeUnary(s, UnaryOp::AbsFloat64)"),
    ("f64.neg",        "makeUnary(s, UnaryOp::NegFloat64)"),
    ("f64.ceil",       "makeUnary(s, UnaryOp::CeilFloat64)"),
    ("f64.floor",      "makeUnary(s, UnaryOp::FloorFloat64)"),
    ("f64.trunc",      "makeUnary(s, UnaryOp::TruncFloat64)"),
    ("f64.nearest",    "makeUnary(s, UnaryOp::NearestFloat64)"),
    ("f64.sqrt",       "makeUnary(s, UnaryOp::SqrtFloat64)"),
    ("f64.add",        "makeBinary(s, BinaryOp::AddFloat64)"),
    ("f64.sub",        "makeBinary(s, BinaryOp::SubFloat64)"),
    ("f64.mul",        "makeBinary(s, BinaryOp::MulFloat64)"),
    ("f64.div",        "makeBinary(s, BinaryOp::DivFloat64)"),
    ("f64.min",        "makeBinary(s, BinaryOp::MinFloat64)"),
    ("f64.max",        "makeBinary(s, BinaryOp::MaxFloat64)"),
    ("f64.copysign",   "makeBinary(s, BinaryOp::CopySignFloat64)"),
    ("i32.wrap_i64",   "makeUnary(s, UnaryOp::WrapInt64)"),
    ("i32.trunc_f32_s",     "makeUnary(s, UnaryOp::TruncSFloat32ToInt32)"),
    ("i32.trunc_f32_u",     "makeUnary(s, UnaryOp::TruncUFloat32ToInt32)"),
    ("i32.trunc_f64_s",     "makeUnary(s, UnaryOp::TruncSFloat64ToInt32)"),
    ("i32.trunc_f64_u",     "makeUnary(s, UnaryOp::TruncUFloat64ToInt32)"),
    ("i64.extend_i32_s",    "makeUnary(s, UnaryOp::ExtendSInt32)"),
    ("i64.extend_i32_u",    "makeUnary(s, UnaryOp::ExtendUInt32)"),
    ("i64.trunc_f32_s",     "makeUnary(s, UnaryOp::TruncSFloat32ToInt64)"),
    ("i64.trunc_f32_u",     "makeUnary(s, UnaryOp::TruncUFloat32ToInt64)"),
    ("i64.trunc_f64_s",     "makeUnary(s, UnaryOp::TruncSFloat64ToInt64)"),
    ("i64.trunc_f64_u",     "makeUnary(s, UnaryOp::TruncUFloat64ToInt64)"),
    ("f32.convert_i32_s",   "makeUnary(s, UnaryOp::ConvertSInt32ToFloat32)"),
    ("f32.convert_i32_u",   "makeUnary(s, UnaryOp::ConvertUInt32ToFloat32)"),
    ("f32.convert_i64_s",   "makeUnary(s, UnaryOp::ConvertSInt64ToFloat32)"),
    ("f32.convert_i64_u",   "makeUnary(s, UnaryOp::ConvertUInt64ToFloat32)"),
    ("f32.demote_f64",      "makeUnary(s, UnaryOp::DemoteFloat64)"),
    ("f64.convert_i32_s",   "makeUnary(s, UnaryOp::ConvertSInt32ToFloat64)"),
    ("f64.convert_i32_u",   "makeUnary(s, UnaryOp::ConvertUInt32ToFloat64)"),
    ("f64.convert_i64_s",   "makeUnary(s, UnaryOp::ConvertSInt64ToFloat64)"),
    ("f64.convert_i64_u",   "makeUnary(s, UnaryOp::ConvertUInt64ToFloat64)"),
    ("f64.promote_f32",     "makeUnary(s, UnaryOp::PromoteFloat32)"),
    ("i32.reinterpret_f32", "makeUnary(s, UnaryOp::ReinterpretFloat32)"),
    ("i64.reinterpret_f64", "makeUnary(s, UnaryOp::ReinterpretFloat64)"),
    ("f32.reinterpret_i32", "makeUnary(s, UnaryOp::ReinterpretInt32)"),
    ("f64.reinterpret_i64", "makeUnary(s, UnaryOp::ReinterpretInt64)"),
    ("i32.extend8_s",       "makeUnary(s, UnaryOp::ExtendS8Int32)"),
    ("i32.extend16_s",      "makeUnary(s, UnaryOp::ExtendS16Int32)"),
    ("i64.extend8_s",       "makeUnary(s, UnaryOp::ExtendS8Int64)"),
    ("i64.extend16_s",      "makeUnary(s, UnaryOp::ExtendS16Int64)"),
    ("i64.extend32_s",      "makeUnary(s, UnaryOp::ExtendS32Int64)"),
    # atomic instructions
    ("atomic.notify",           "makeAtomicNotify(s)"),
    ("i32.atomic.wait",         "makeAtomicWait(s, Type::i32)"),
    ("i64.atomic.wait",         "makeAtomicWait(s, Type::i64)"),
    ("atomic.fence",            "makeAtomicFence(s)"),
    ("i32.atomic.load8_u",      "makeLoad(s, Type::i32, /*isAtomic=*/true)"),
    ("i32.atomic.load16_u",     "makeLoad(s, Type::i32, /*isAtomic=*/true)"),
    ("i32.atomic.load",         "makeLoad(s, Type::i32, /*isAtomic=*/true)"),
    ("i64.atomic.load8_u",      "makeLoad(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.load16_u",     "makeLoad(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.load32_u",     "makeLoad(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.load",         "makeLoad(s, Type::i64, /*isAtomic=*/true)"),
    ("i32.atomic.store8",       "makeStore(s, Type::i32, /*isAtomic=*/true)"),
    ("i32.atomic.store16",      "makeStore(s, Type::i32, /*isAtomic=*/true)"),
    ("i32.atomic.store",        "makeStore(s, Type::i32, /*isAtomic=*/true)"),
    ("i64.atomic.store8",       "makeStore(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.store16",      "makeStore(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.store32",      "makeStore(s, Type::i64, /*isAtomic=*/true)"),
    ("i64.atomic.store",        "makeStore(s, Type::i64, /*isAtomic=*/true)"),
    ("i32.atomic.rmw8.add_u",   "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.add_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.add",      "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.add_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.add_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.add_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.add",      "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.sub_u",   "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.sub_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.sub",      "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.sub_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.sub_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.sub_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.sub",      "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.and_u",   "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.and_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.and",      "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.and_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.and_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.and_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.and",      "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.or_u",    "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.or_u",   "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.or",       "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.or_u",    "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.or_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.or_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.or",       "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.xor_u",   "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.xor_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.xor",      "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.xor_u",   "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.xor_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.xor_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.xor",      "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.xchg_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.xchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.xchg",     "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.xchg_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.xchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.xchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.xchg",     "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i32.atomic.rmw8.cmpxchg_u",  "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw16.cmpxchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i32.atomic.rmw.cmpxchg",     "makeAtomicRMWOrCmpxchg(s, Type::i32)"),
    ("i64.atomic.rmw8.cmpxchg_u",  "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw16.cmpxchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw32.cmpxchg_u", "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    ("i64.atomic.rmw.cmpxchg",     "makeAtomicRMWOrCmpxchg(s, Type::i64)"),
    # nontrapping float-to-int instructions
    ("i32.trunc_sat_f32_s", "makeUnary(s, UnaryOp::TruncSatSFloat32ToInt32)"),
    ("i32.trunc_sat_f32_u", "makeUnary(s, UnaryOp::TruncSatUFloat32ToInt32)"),
    ("i32.trunc_sat_f64_s", "makeUnary(s, UnaryOp::TruncSatSFloat64ToInt32)"),
    ("i32.trunc_sat_f64_u", "makeUnary(s, UnaryOp::TruncSatUFloat64ToInt32)"),
    ("i64.trunc_sat_f32_s", "makeUnary(s, UnaryOp::TruncSatSFloat32ToInt64)"),
    ("i64.trunc_sat_f32_u", "makeUnary(s, UnaryOp::TruncSatUFloat32ToInt64)"),
    ("i64.trunc_sat_f64_s", "makeUnary(s, UnaryOp::TruncSatSFloat64ToInt64)"),
    ("i64.trunc_sat_f64_u", "makeUnary(s, UnaryOp::TruncSatUFloat64ToInt64)"),
    # SIMD ops
    ("v128.load",            "makeLoad(s, Type::v128, /*isAtomic=*/false)"),
    ("v128.store",           "makeStore(s, Type::v128, /*isAtomic=*/false)"),
    ("v128.const",           "makeConst(s, Type::v128)"),
    ("v8x16.shuffle",        "makeSIMDShuffle(s)"),
    ("i8x16.splat",          "makeUnary(s, UnaryOp::SplatVecI8x16)"),
    ("i8x16.extract_lane_s", "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneSVecI8x16, 16)"),
    ("i8x16.extract_lane_u", "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneUVecI8x16, 16)"),
    ("i8x16.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecI8x16, 16)"),
    ("i16x8.splat",          "makeUnary(s, UnaryOp::SplatVecI16x8)"),
    ("i16x8.extract_lane_s", "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneSVecI16x8, 8)"),
    ("i16x8.extract_lane_u", "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneUVecI16x8, 8)"),
    ("i16x8.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecI16x8, 8)"),
    ("i32x4.splat",          "makeUnary(s, UnaryOp::SplatVecI32x4)"),
    ("i32x4.extract_lane",   "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneVecI32x4, 4)"),
    ("i32x4.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecI32x4, 4)"),
    ("i64x2.splat",          "makeUnary(s, UnaryOp::SplatVecI64x2)"),
    ("i64x2.extract_lane",   "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneVecI64x2, 2)"),
    ("i64x2.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecI64x2, 2)"),
    ("f32x4.splat",          "makeUnary(s, UnaryOp::SplatVecF32x4)"),
    ("f32x4.extract_lane",   "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneVecF32x4, 4)"),
    ("f32x4.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecF32x4, 4)"),
    ("f64x2.splat",          "makeUnary(s, UnaryOp::SplatVecF64x2)"),
    ("f64x2.extract_lane",   "makeSIMDExtract(s, SIMDExtractOp::ExtractLaneVecF64x2, 2)"),
    ("f64x2.replace_lane",   "makeSIMDReplace(s, SIMDReplaceOp::ReplaceLaneVecF64x2, 2)"),
    ("i8x16.eq",             "makeBinary(s, BinaryOp::EqVecI8x16)"),
    ("i8x16.ne",             "makeBinary(s, BinaryOp::NeVecI8x16)"),
    ("i8x16.lt_s",           "makeBinary(s, BinaryOp::LtSVecI8x16)"),
    ("i8x16.lt_u",           "makeBinary(s, BinaryOp::LtUVecI8x16)"),
    ("i8x16.gt_s",           "makeBinary(s, BinaryOp::GtSVecI8x16)"),
    ("i8x16.gt_u",           "makeBinary(s, BinaryOp::GtUVecI8x16)"),
    ("i8x16.le_s",           "makeBinary(s, BinaryOp::LeSVecI8x16)"),
    ("i8x16.le_u",           "makeBinary(s, BinaryOp::LeUVecI8x16)"),
    ("i8x16.ge_s",           "makeBinary(s, BinaryOp::GeSVecI8x16)"),
    ("i8x16.ge_u",           "makeBinary(s, BinaryOp::GeUVecI8x16)"),
    ("i16x8.eq",             "makeBinary(s, BinaryOp::EqVecI16x8)"),
    ("i16x8.ne",             "makeBinary(s, BinaryOp::NeVecI16x8)"),
    ("i16x8.lt_s",           "makeBinary(s, BinaryOp::LtSVecI16x8)"),
    ("i16x8.lt_u",           "makeBinary(s, BinaryOp::LtUVecI16x8)"),
    ("i16x8.gt_s",           "makeBinary(s, BinaryOp::GtSVecI16x8)"),
    ("i16x8.gt_u",           "makeBinary(s, BinaryOp::GtUVecI16x8)"),
    ("i16x8.le_s",           "makeBinary(s, BinaryOp::LeSVecI16x8)"),
    ("i16x8.le_u",           "makeBinary(s, BinaryOp::LeUVecI16x8)"),
    ("i16x8.ge_s",           "makeBinary(s, BinaryOp::GeSVecI16x8)"),
    ("i16x8.ge_u",           "makeBinary(s, BinaryOp::GeUVecI16x8)"),
    ("i32x4.eq",             "makeBinary(s, BinaryOp::EqVecI32x4)"),
    ("i32x4.ne",             "makeBinary(s, BinaryOp::NeVecI32x4)"),
    ("i32x4.lt_s",           "makeBinary(s, BinaryOp::LtSVecI32x4)"),
    ("i32x4.lt_u",           "makeBinary(s, BinaryOp::LtUVecI32x4)"),
    ("i32x4.gt_s",           "makeBinary(s, BinaryOp::GtSVecI32x4)"),
    ("i32x4.gt_u",           "makeBinary(s, BinaryOp::GtUVecI32x4)"),
    ("i32x4.le_s",           "makeBinary(s, BinaryOp::LeSVecI32x4)"),
    ("i32x4.le_u",           "makeBinary(s, BinaryOp::LeUVecI32x4)"),
    ("i32x4.ge_s",           "makeBinary(s, BinaryOp::GeSVecI32x4)"),
    ("i32x4.ge_u",           "makeBinary(s, BinaryOp::GeUVecI32x4)"),
    ("f32x4.eq",             "makeBinary(s, BinaryOp::EqVecF32x4)"),
    ("f32x4.ne",             "makeBinary(s, BinaryOp::NeVecF32x4)"),
    ("f32x4.lt",             "makeBinary(s, BinaryOp::LtVecF32x4)"),
    ("f32x4.gt",             "makeBinary(s, BinaryOp::GtVecF32x4)"),
    ("f32x4.le",             "makeBinary(s, BinaryOp::LeVecF32x4)"),
    ("f32x4.ge",             "makeBinary(s, BinaryOp::GeVecF32x4)"),
    ("f64x2.eq",             "makeBinary(s, BinaryOp::EqVecF64x2)"),
    ("f64x2.ne",             "makeBinary(s, BinaryOp::NeVecF64x2)"),
    ("f64x2.lt",             "makeBinary(s, BinaryOp::LtVecF64x2)"),
    ("f64x2.gt",             "makeBinary(s, BinaryOp::GtVecF64x2)"),
    ("f64x2.le",             "makeBinary(s, BinaryOp::LeVecF64x2)"),
    ("f64x2.ge",             "makeBinary(s, BinaryOp::GeVecF64x2)"),
    ("v128.not",             "makeUnary(s, UnaryOp::NotVec128)"),
    ("v128.and",             "makeBinary(s, BinaryOp::AndVec128)"),
    ("v128.or",              "makeBinary(s, BinaryOp::OrVec128)"),
    ("v128.xor",             "makeBinary(s, BinaryOp::XorVec128)"),
    ("v128.andnot",          "makeBinary(s, BinaryOp::AndNotVec128)"),
    ("v128.bitselect",       "makeSIMDTernary(s, SIMDTernaryOp::Bitselect)"),
    ("i8x16.neg",            "makeUnary(s, UnaryOp::NegVecI8x16)"),
    ("i8x16.any_true",       "makeUnary(s, UnaryOp::AnyTrueVecI8x16)"),
    ("i8x16.all_true",       "makeUnary(s, UnaryOp::AllTrueVecI8x16)"),
    ("i8x16.shl",            "makeSIMDShift(s, SIMDShiftOp::ShlVecI8x16)"),
    ("i8x16.shr_s",          "makeSIMDShift(s, SIMDShiftOp::ShrSVecI8x16)"),
    ("i8x16.shr_u",          "makeSIMDShift(s, SIMDShiftOp::ShrUVecI8x16)"),
    ("i8x16.add",            "makeBinary(s, BinaryOp::AddVecI8x16)"),
    ("i8x16.add_saturate_s", "makeBinary(s, BinaryOp::AddSatSVecI8x16)"),
    ("i8x16.add_saturate_u", "makeBinary(s, BinaryOp::AddSatUVecI8x16)"),
    ("i8x16.sub",            "makeBinary(s, BinaryOp::SubVecI8x16)"),
    ("i8x16.sub_saturate_s", "makeBinary(s, BinaryOp::SubSatSVecI8x16)"),
    ("i8x16.sub_saturate_u", "makeBinary(s, BinaryOp::SubSatUVecI8x16)"),
    ("i8x16.mul",            "makeBinary(s, BinaryOp::MulVecI8x16)"),
    ("i8x16.min_s",          "makeBinary(s, BinaryOp::MinSVecI8x16)"),
    ("i8x16.min_u",          "makeBinary(s, BinaryOp::MinUVecI8x16)"),
    ("i8x16.max_s",          "makeBinary(s, BinaryOp::MaxSVecI8x16)"),
    ("i8x16.max_u",          "makeBinary(s, BinaryOp::MaxUVecI8x16)"),
    ("i8x16.avgr_u",         "makeBinary(s, BinaryOp::AvgrUVecI8x16)"),
    ("i16x8.neg",            "makeUnary(s, UnaryOp::NegVecI16x8)"),
    ("i16x8.any_true",       "makeUnary(s, UnaryOp::AnyTrueVecI16x8)"),
    ("i16x8.all_true",       "makeUnary(s, UnaryOp::AllTrueVecI16x8)"),
    ("i16x8.shl",            "makeSIMDShift(s, SIMDShiftOp::ShlVecI16x8)"),
    ("i16x8.shr_s",          "makeSIMDShift(s, SIMDShiftOp::ShrSVecI16x8)"),
    ("i16x8.shr_u",          "makeSIMDShift(s, SIMDShiftOp::ShrUVecI16x8)"),
    ("i16x8.add",            "makeBinary(s, BinaryOp::AddVecI16x8)"),
    ("i16x8.add_saturate_s", "makeBinary(s, BinaryOp::AddSatSVecI16x8)"),
    ("i16x8.add_saturate_u", "makeBinary(s, BinaryOp::AddSatUVecI16x8)"),
    ("i16x8.sub",            "makeBinary(s, BinaryOp::SubVecI16x8)"),
    ("i16x8.sub_saturate_s", "makeBinary(s, BinaryOp::SubSatSVecI16x8)"),
    ("i16x8.sub_saturate_u", "makeBinary(s, BinaryOp::SubSatUVecI16x8)"),
    ("i16x8.mul",            "makeBinary(s, BinaryOp::MulVecI16x8)"),
    ("i16x8.min_s",          "makeBinary(s, BinaryOp::MinSVecI16x8)"),
    ("i16x8.min_u",          "makeBinary(s, BinaryOp::MinUVecI16x8)"),
    ("i16x8.max_s",          "makeBinary(s, BinaryOp::MaxSVecI16x8)"),
    ("i16x8.max_u",          "makeBinary(s, BinaryOp::MaxUVecI16x8)"),
    ("i16x8.avgr_u",         "makeBinary(s, BinaryOp::AvgrUVecI16x8)"),
    ("i32x4.neg",            "makeUnary(s, UnaryOp::NegVecI32x4)"),
    ("i32x4.any_true",       "makeUnary(s, UnaryOp::AnyTrueVecI32x4)"),
    ("i32x4.all_true",       "makeUnary(s, UnaryOp::AllTrueVecI32x4)"),
    ("i32x4.shl",            "makeSIMDShift(s, SIMDShiftOp::ShlVecI32x4)"),
    ("i32x4.shr_s",          "makeSIMDShift(s, SIMDShiftOp::ShrSVecI32x4)"),
    ("i32x4.shr_u",          "makeSIMDShift(s, SIMDShiftOp::ShrUVecI32x4)"),
    ("i32x4.add",            "makeBinary(s, BinaryOp::AddVecI32x4)"),
    ("i32x4.sub",            "makeBinary(s, BinaryOp::SubVecI32x4)"),
    ("i32x4.mul",            "makeBinary(s, BinaryOp::MulVecI32x4)"),
    ("i32x4.min_s",          "makeBinary(s, BinaryOp::MinSVecI32x4)"),
    ("i32x4.min_u",          "makeBinary(s, BinaryOp::MinUVecI32x4)"),
    ("i32x4.max_s",          "makeBinary(s, BinaryOp::MaxSVecI32x4)"),
    ("i32x4.max_u",          "makeBinary(s, BinaryOp::MaxUVecI32x4)"),
    ("i32x4.dot_i16x8_s",    "makeBinary(s, BinaryOp::DotSVecI16x8ToVecI32x4)"),
    ("i64x2.neg",            "makeUnary(s, UnaryOp::NegVecI64x2)"),
    ("i64x2.any_true",       "makeUnary(s, UnaryOp::AnyTrueVecI64x2)"),
    ("i64x2.all_true",       "makeUnary(s, UnaryOp::AllTrueVecI64x2)"),
    ("i64x2.shl",            "makeSIMDShift(s, SIMDShiftOp::ShlVecI64x2)"),
    ("i64x2.shr_s",          "makeSIMDShift(s, SIMDShiftOp::ShrSVecI64x2)"),
    ("i64x2.shr_u",          "makeSIMDShift(s, SIMDShiftOp::ShrUVecI64x2)"),
    ("i64x2.add",            "makeBinary(s, BinaryOp::AddVecI64x2)"),
    ("i64x2.sub",            "makeBinary(s, BinaryOp::SubVecI64x2)"),
    ("f32x4.abs",            "makeUnary(s, UnaryOp::AbsVecF32x4)"),
    ("f32x4.neg",            "makeUnary(s, UnaryOp::NegVecF32x4)"),
    ("f32x4.sqrt",           "makeUnary(s, UnaryOp::SqrtVecF32x4)"),
    ("f32x4.qfma",           "makeSIMDTernary(s, SIMDTernaryOp::QFMAF32x4)"),
    ("f32x4.qfms",           "makeSIMDTernary(s, SIMDTernaryOp::QFMSF32x4)"),
    ("f32x4.add",            "makeBinary(s, BinaryOp::AddVecF32x4)"),
    ("f32x4.sub",            "makeBinary(s, BinaryOp::SubVecF32x4)"),
    ("f32x4.mul",            "makeBinary(s, BinaryOp::MulVecF32x4)"),
    ("f32x4.div",            "makeBinary(s, BinaryOp::DivVecF32x4)"),
    ("f32x4.min",            "makeBinary(s, BinaryOp::MinVecF32x4)"),
    ("f32x4.max",            "makeBinary(s, BinaryOp::MaxVecF32x4)"),
    ("f64x2.abs",            "makeUnary(s, UnaryOp::AbsVecF64x2)"),
    ("f64x2.neg",            "makeUnary(s, UnaryOp::NegVecF64x2)"),
    ("f64x2.sqrt",           "makeUnary(s, UnaryOp::SqrtVecF64x2)"),
    ("f64x2.qfma",           "makeSIMDTernary(s, SIMDTernaryOp::QFMAF64x2)"),
    ("f64x2.qfms",           "makeSIMDTernary(s, SIMDTernaryOp::QFMSF64x2)"),
    ("f64x2.add",            "makeBinary(s, BinaryOp::AddVecF64x2)"),
    ("f64x2.sub",            "makeBinary(s, BinaryOp::SubVecF64x2)"),
    ("f64x2.mul",            "makeBinary(s, BinaryOp::MulVecF64x2)"),
    ("f64x2.div",            "makeBinary(s, BinaryOp::DivVecF64x2)"),
    ("f64x2.min",            "makeBinary(s, BinaryOp::MinVecF64x2)"),
    ("f64x2.max",            "makeBinary(s, BinaryOp::MaxVecF64x2)"),
    ("i32x4.trunc_sat_f32x4_s",  "makeUnary(s, UnaryOp::TruncSatSVecF32x4ToVecI32x4)"),
    ("i32x4.trunc_sat_f32x4_u",  "makeUnary(s, UnaryOp::TruncSatUVecF32x4ToVecI32x4)"),
    ("i64x2.trunc_sat_f64x2_s",  "makeUnary(s, UnaryOp::TruncSatSVecF64x2ToVecI64x2)"),
    ("i64x2.trunc_sat_f64x2_u",  "makeUnary(s, UnaryOp::TruncSatUVecF64x2ToVecI64x2)"),
    ("f32x4.convert_i32x4_s",    "makeUnary(s, UnaryOp::ConvertSVecI32x4ToVecF32x4)"),
    ("f32x4.convert_i32x4_u",    "makeUnary(s, UnaryOp::ConvertUVecI32x4ToVecF32x4)"),
    ("f64x2.convert_i64x2_s",    "makeUnary(s, UnaryOp::ConvertSVecI64x2ToVecF64x2)"),
    ("f64x2.convert_i64x2_u",    "makeUnary(s, UnaryOp::ConvertUVecI64x2ToVecF64x2)"),
    ("v8x16.load_splat",         "makeSIMDLoad(s, SIMDLoadOp::LoadSplatVec8x16)"),
    ("v16x8.load_splat",         "makeSIMDLoad(s, SIMDLoadOp::LoadSplatVec16x8)"),
    ("v32x4.load_splat",         "makeSIMDLoad(s, SIMDLoadOp::LoadSplatVec32x4)"),
    ("v64x2.load_splat",         "makeSIMDLoad(s, SIMDLoadOp::LoadSplatVec64x2)"),
    ("i16x8.load8x8_s",          "makeSIMDLoad(s, SIMDLoadOp::LoadExtSVec8x8ToVecI16x8)"),
    ("i16x8.load8x8_u",          "makeSIMDLoad(s, SIMDLoadOp::LoadExtUVec8x8ToVecI16x8)"),
    ("i32x4.load16x4_s",         "makeSIMDLoad(s, SIMDLoadOp::LoadExtSVec16x4ToVecI32x4)"),
    ("i32x4.load16x4_u",         "makeSIMDLoad(s, SIMDLoadOp::LoadExtUVec16x4ToVecI32x4)"),
    ("i64x2.load32x2_s",         "makeSIMDLoad(s, SIMDLoadOp::LoadExtSVec32x2ToVecI64x2)"),
    ("i64x2.load32x2_u",         "makeSIMDLoad(s, SIMDLoadOp::LoadExtUVec32x2ToVecI64x2)"),
    ("i8x16.narrow_i16x8_s",     "makeBinary(s, BinaryOp::NarrowSVecI16x8ToVecI8x16)"),
    ("i8x16.narrow_i16x8_u",     "makeBinary(s, BinaryOp::NarrowUVecI16x8ToVecI8x16)"),
    ("i16x8.narrow_i32x4_s",     "makeBinary(s, BinaryOp::NarrowSVecI32x4ToVecI16x8)"),
    ("i16x8.narrow_i32x4_u",     "makeBinary(s, BinaryOp::NarrowUVecI32x4ToVecI16x8)"),
    ("i16x8.widen_low_i8x16_s",  "makeUnary(s, UnaryOp::WidenLowSVecI8x16ToVecI16x8)"),
    ("i16x8.widen_high_i8x16_s", "makeUnary(s, UnaryOp::WidenHighSVecI8x16ToVecI16x8)"),
    ("i16x8.widen_low_i8x16_u",  "makeUnary(s, UnaryOp::WidenLowUVecI8x16ToVecI16x8)"),
    ("i16x8.widen_high_i8x16_u", "makeUnary(s, UnaryOp::WidenHighUVecI8x16ToVecI16x8)"),
    ("i32x4.widen_low_i16x8_s",  "makeUnary(s, UnaryOp::WidenLowSVecI16x8ToVecI32x4)"),
    ("i32x4.widen_high_i16x8_s", "makeUnary(s, UnaryOp::WidenHighSVecI16x8ToVecI32x4)"),
    ("i32x4.widen_low_i16x8_u",  "makeUnary(s, UnaryOp::WidenLowUVecI16x8ToVecI32x4)"),
    ("i32x4.widen_high_i16x8_u", "makeUnary(s, UnaryOp::WidenHighUVecI16x8ToVecI32x4)"),
    ("v8x16.swizzle",            "makeBinary(s, BinaryOp::SwizzleVec8x16)"),
    # reference types instructions
    # TODO Add table instructions
    ("ref.null",             "makeRefNull(s)"),
    ("ref.is_null",          "makeRefIsNull(s)"),
    ("ref.func",             "makeRefFunc(s)"),
    # exception handling instructions
    ("try",                  "makeTry(s)"),
    ("throw",                "makeThrow(s)"),
    ("rethrow",              "makeRethrow(s)"),
    ("br_on_exn",            "makeBrOnExn(s)")
]


class CodePrinter:
    indents = 0

    def __enter__(self):
        CodePrinter.indents += 1

    def __exit__(self, *args):
        CodePrinter.indents -= 1

    def indent(self):
        # call in a 'with' statement
        return self

    def print_line(self, line):
        print("  " * CodePrinter.indents + line)


class Node:
    def __init__(self, expr=None, children=None, inst=None):
        # the expression to return if this is the string has ended
        self.expr = expr
        # map unique strings to children nodes
        self.children = children if children else {}
        # full instruction leading to this node
        self.inst = inst

    def _common_prefix(a, b):
        """Return the common prefix of two strings."""
        prefix = []
        while a and b and a[0] == b[0]:
            prefix.append(a[0])
            a = a[1:]
            b = b[1:]
        return "".join(prefix)

    def do_insert(self, full_inst, inst, expr):
        if not inst:
            assert self.expr is None, "Repeated instruction " + full_inst
            self.expr = expr
            self.inst = full_inst
            return
        # find key with shared prefix
        prefix, key = "", None
        for k in self.children:
            prefix = Node._common_prefix(inst, k)
            if prefix:
                key = k
                break
        if key is None:
            # unique prefix, insert and stop
            self.children[inst] = Node(expr, inst=full_inst)
            return
        key_remainder = key[len(prefix):]
        if key_remainder:
            # split key and move everything after the prefix to a new node
            child = self.children.pop(key)
            self.children[prefix] = Node(children={key_remainder: child})
            # update key for recursive insert
            key = prefix
        # chop off prefix and recurse
        self.children[key].do_insert(full_inst, inst[len(key):], expr)

    def insert(self, inst, expr):
        self.do_insert(inst, inst, expr)


def instruction_parser():
    """Build a trie out of all the instructions, then emit it as C++ code."""
    trie = Node()
    inst_length = 0
    for inst, expr in instructions:
        inst_length = max(inst_length, len(inst))
        trie.insert(inst, expr)

    printer = CodePrinter()

    printer.print_line("char op[{}] = {{'\\0'}};".format(inst_length + 1))
    printer.print_line("strncpy(op, s[0]->c_str(), {});".format(inst_length))

    def print_leaf(expr, inst):
        printer.print_line("if (strcmp(op, \"{inst}\") == 0) {{ return {expr}; }}"
                           .format(inst=inst, expr=expr))
        printer.print_line("goto parse_error;")

    def emit(node, idx=0):
        assert node.children
        printer.print_line("switch (op[{}]) {{".format(idx))
        with printer.indent():
            if node.expr:
                printer.print_line("case '\\0':")
                with printer.indent():
                    print_leaf(node.expr, node.inst)
            children = sorted(node.children.items(), key=lambda pair: pair[0])
            for prefix, child in children:
                if child.children:
                    printer.print_line("case '{}': {{".format(prefix[0]))
                    with printer.indent():
                        emit(child, idx + len(prefix))
                    printer.print_line("}")
                else:
                    assert child.expr
                    printer.print_line("case '{}':".format(prefix[0]))
                    with printer.indent():
                        print_leaf(child.expr, child.inst)
            printer.print_line("default: goto parse_error;")
        printer.print_line("}")

    emit(trie)
    printer.print_line("parse_error:")
    with printer.indent():
        printer.print_line("throw ParseException(std::string(op), s.line, s.col);")


def print_header():
    print("// DO NOT EDIT! This file generated by scripts/gen-s-parser.py\n")
    print("// clang-format off\n")


def print_footer():
    print("\n// clang-format on")


def generate_with_guard(generator, guard):
    print("#ifdef {}".format(guard))
    print("#undef {}".format(guard))
    generator()
    print("#endif // {}".format(guard))


def main():
    if sys.version_info.major != 3:
        import datetime
        print("It's " + str(datetime.datetime.now().year) + "! Use Python 3!")
        sys.exit(1)
    print_header()
    generate_with_guard(instruction_parser, "INSTRUCTION_PARSER")
    print_footer()


if __name__ == "__main__":
    main()