[chore] remove vendor

1 files changed, 0 insertions, 2336 deletions

diff --git a/vendor/github.com/tetratelabs/wazero/internal/wasm/func_validation.go b/vendor/github.com/tetratelabs/wazero/internal/wasm/func_validation.go
deleted file mode 100644
index 604489228..000000000
--- a/vendor/github.com/tetratelabs/wazero/internal/wasm/func_validation.go
+++ /dev/null
@@ -1,2336 +0,0 @@
-package wasm
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"strconv"
-	"strings"
-
-	"github.com/tetratelabs/wazero/api"
-	"github.com/tetratelabs/wazero/experimental"
-	"github.com/tetratelabs/wazero/internal/leb128"
-)
-
-// The wazero specific limitation described at RATIONALE.md.
-const maximumValuesOnStack = 1 << 27
-
-// validateFunction validates the instruction sequence of a function.
-// following the specification https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#instructions%E2%91%A2.
-//
-// * idx is the index in the FunctionSection
-// * functions are the function index, which is prefixed by imports. The value is the TypeSection index.
-// * globals are the global index, which is prefixed by imports.
-// * memory is the potentially imported memory and can be nil.
-// * table is the potentially imported table and can be nil.
-// * declaredFunctionIndexes is the set of function indexes declared by declarative element segments which can be acceed by OpcodeRefFunc instruction.
-//
-// Returns an error if the instruction sequence is not valid,
-// or potentially it can exceed the maximum number of values on the stack.
-func (m *Module) validateFunction(sts *stacks, enabledFeatures api.CoreFeatures, idx Index, functions []Index,
-	globals []GlobalType, memory *Memory, tables []Table, declaredFunctionIndexes map[Index]struct{}, br *bytes.Reader,
-) error {
-	return m.validateFunctionWithMaxStackValues(sts, enabledFeatures, idx, functions, globals, memory, tables, maximumValuesOnStack, declaredFunctionIndexes, br)
-}
-
-func readMemArg(pc uint64, body []byte) (align, offset uint32, read uint64, err error) {
-	align, num, err := leb128.LoadUint32(body[pc:])
-	if err != nil {
-		err = fmt.Errorf("read memory align: %v", err)
-		return
-	}
-	read += num
-
-	offset, num, err = leb128.LoadUint32(body[pc+num:])
-	if err != nil {
-		err = fmt.Errorf("read memory offset: %v", err)
-		return
-	}
-
-	read += num
-	return align, offset, read, nil
-}
-
-// validateFunctionWithMaxStackValues is like validateFunction, but allows overriding maxStackValues for testing.
-//
-// * stacks is to track the state of Wasm value and control frame stacks at anypoint of execution, and reused to reduce allocation.
-// * maxStackValues is the maximum height of values stack which the target is allowed to reach.
-func (m *Module) validateFunctionWithMaxStackValues(
-	sts *stacks,
-	enabledFeatures api.CoreFeatures,
-	idx Index,
-	functions []Index,
-	globals []GlobalType,
-	memory *Memory,
-	tables []Table,
-	maxStackValues int,
-	declaredFunctionIndexes map[Index]struct{},
-	br *bytes.Reader,
-) error {
-	functionType := &m.TypeSection[m.FunctionSection[idx]]
-	code := &m.CodeSection[idx]
-	body := code.Body
-	localTypes := code.LocalTypes
-
-	sts.reset(functionType)
-	valueTypeStack := &sts.vs
-	// We start with the outermost control block which is for function return if the code branches into it.
-	controlBlockStack := &sts.cs
-
-	// Now start walking through all the instructions in the body while tracking
-	// control blocks and value types to check the validity of all instructions.
-	for pc := uint64(0); pc < uint64(len(body)); pc++ {
-		op := body[pc]
-		if false {
-			var instName string
-			if op == OpcodeMiscPrefix {
-				instName = MiscInstructionName(body[pc+1])
-			} else if op == OpcodeVecPrefix {
-				instName = VectorInstructionName(body[pc+1])
-			} else if op == OpcodeAtomicPrefix {
-				instName = AtomicInstructionName(body[pc+1])
-			} else {
-				instName = InstructionName(op)
-			}
-			fmt.Printf("handling %s, stack=%s, blocks: %v\n", instName, valueTypeStack.stack, controlBlockStack)
-		}
-
-		if len(controlBlockStack.stack) == 0 {
-			return fmt.Errorf("unexpected end of function at pc=%#x", pc)
-		}
-
-		if OpcodeI32Load <= op && op <= OpcodeI64Store32 {
-			if memory == nil {
-				return fmt.Errorf("memory must exist for %s", InstructionName(op))
-			}
-			pc++
-			align, _, read, err := readMemArg(pc, body)
-			if err != nil {
-				return err
-			}
-			pc += read - 1
-			switch op {
-			case OpcodeI32Load:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeF32Load:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeI32Store:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeF32Store:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI64Load:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeF64Load:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeI64Store:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeF64Store:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI32Load8S:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32Load8U:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Load8S, OpcodeI64Load8U:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI32Store8:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI64Store8:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI32Load16S, OpcodeI32Load16U:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Load16S, OpcodeI64Load16U:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI32Store16:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI64Store16:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeI64Load32S, OpcodeI64Load32U:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI64Store32:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			}
-		} else if OpcodeMemorySize <= op && op <= OpcodeMemoryGrow {
-			if memory == nil {
-				return fmt.Errorf("memory must exist for %s", InstructionName(op))
-			}
-			pc++
-			val, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			}
-			if val != 0 || num != 1 {
-				return fmt.Errorf("memory instruction reserved bytes not zero with 1 byte")
-			}
-			switch Opcode(op) {
-			case OpcodeMemoryGrow:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeMemorySize:
-				valueTypeStack.push(ValueTypeI32)
-			}
-			pc += num - 1
-		} else if OpcodeI32Const <= op && op <= OpcodeF64Const {
-			pc++
-			switch Opcode(op) {
-			case OpcodeI32Const:
-				_, num, err := leb128.LoadInt32(body[pc:])
-				if err != nil {
-					return fmt.Errorf("read i32 immediate: %s", err)
-				}
-				pc += num - 1
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Const:
-				_, num, err := leb128.LoadInt64(body[pc:])
-				if err != nil {
-					return fmt.Errorf("read i64 immediate: %v", err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-				pc += num - 1
-			case OpcodeF32Const:
-				valueTypeStack.push(ValueTypeF32)
-				pc += 3
-			case OpcodeF64Const:
-				valueTypeStack.push(ValueTypeF64)
-				pc += 7
-			}
-		} else if OpcodeLocalGet <= op && op <= OpcodeGlobalSet {
-			pc++
-			index, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			}
-			pc += num - 1
-			switch op {
-			case OpcodeLocalGet:
-				inputLen := uint32(len(functionType.Params))
-				if l := uint32(len(localTypes)) + inputLen; index >= l {
-					return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
-						OpcodeLocalGetName, index, l)
-				}
-				if index < inputLen {
-					valueTypeStack.push(functionType.Params[index])
-				} else {
-					valueTypeStack.push(localTypes[index-inputLen])
-				}
-			case OpcodeLocalSet:
-				inputLen := uint32(len(functionType.Params))
-				if l := uint32(len(localTypes)) + inputLen; index >= l {
-					return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
-						OpcodeLocalSetName, index, l)
-				}
-				var expType ValueType
-				if index < inputLen {
-					expType = functionType.Params[index]
-				} else {
-					expType = localTypes[index-inputLen]
-				}
-				if err := valueTypeStack.popAndVerifyType(expType); err != nil {
-					return err
-				}
-			case OpcodeLocalTee:
-				inputLen := uint32(len(functionType.Params))
-				if l := uint32(len(localTypes)) + inputLen; index >= l {
-					return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
-						OpcodeLocalTeeName, index, l)
-				}
-				var expType ValueType
-				if index < inputLen {
-					expType = functionType.Params[index]
-				} else {
-					expType = localTypes[index-inputLen]
-				}
-				if err := valueTypeStack.popAndVerifyType(expType); err != nil {
-					return err
-				}
-				valueTypeStack.push(expType)
-			case OpcodeGlobalGet:
-				if index >= uint32(len(globals)) {
-					return fmt.Errorf("invalid index for %s", OpcodeGlobalGetName)
-				}
-				valueTypeStack.push(globals[index].ValType)
-			case OpcodeGlobalSet:
-				if index >= uint32(len(globals)) {
-					return fmt.Errorf("invalid global index")
-				} else if !globals[index].Mutable {
-					return fmt.Errorf("%s when not mutable", OpcodeGlobalSetName)
-				} else if err := valueTypeStack.popAndVerifyType(
-					globals[index].ValType); err != nil {
-					return err
-				}
-			}
-		} else if op == OpcodeBr {
-			pc++
-			index, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			} else if int(index) >= len(controlBlockStack.stack) {
-				return fmt.Errorf("invalid %s operation: index out of range", OpcodeBrName)
-			}
-			pc += num - 1
-			// Check type soundness.
-			target := &controlBlockStack.stack[len(controlBlockStack.stack)-int(index)-1]
-			var targetResultType []ValueType
-			if target.op == OpcodeLoop {
-				targetResultType = target.blockType.Params
-			} else {
-				targetResultType = target.blockType.Results
-			}
-			if err = valueTypeStack.popResults(op, targetResultType, false); err != nil {
-				return err
-			}
-			// br instruction is stack-polymorphic.
-			valueTypeStack.unreachable()
-		} else if op == OpcodeBrIf {
-			pc++
-			index, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			} else if int(index) >= len(controlBlockStack.stack) {
-				return fmt.Errorf(
-					"invalid ln param given for %s: index=%d with %d for the current label stack length",
-					OpcodeBrIfName, index, len(controlBlockStack.stack))
-			}
-			pc += num - 1
-			if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-				return fmt.Errorf("cannot pop the required operand for %s", OpcodeBrIfName)
-			}
-			// Check type soundness.
-			target := &controlBlockStack.stack[len(controlBlockStack.stack)-int(index)-1]
-			var targetResultType []ValueType
-			if target.op == OpcodeLoop {
-				targetResultType = target.blockType.Params
-			} else {
-				targetResultType = target.blockType.Results
-			}
-			if err := valueTypeStack.popResults(op, targetResultType, false); err != nil {
-				return err
-			}
-			// Push back the result
-			for _, t := range targetResultType {
-				valueTypeStack.push(t)
-			}
-		} else if op == OpcodeBrTable {
-			pc++
-			br.Reset(body[pc:])
-			nl, num, err := leb128.DecodeUint32(br)
-			if err != nil {
-				return fmt.Errorf("read immediate: %w", err)
-			}
-
-			sts.ls = sts.ls[:0]
-			for i := uint32(0); i < nl; i++ {
-				l, n, err := leb128.DecodeUint32(br)
-				if err != nil {
-					return fmt.Errorf("read immediate: %w", err)
-				}
-				num += n
-				sts.ls = append(sts.ls, l)
-			}
-			ln, n, err := leb128.DecodeUint32(br)
-			if err != nil {
-				return fmt.Errorf("read immediate: %w", err)
-			} else if int(ln) >= len(controlBlockStack.stack) {
-				return fmt.Errorf(
-					"invalid ln param given for %s: ln=%d with %d for the current label stack length",
-					OpcodeBrTableName, ln, len(controlBlockStack.stack))
-			}
-			pc += n + num - 1
-			// Check type soundness.
-			if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-				return fmt.Errorf("cannot pop the required operand for %s", OpcodeBrTableName)
-			}
-			lnLabel := &controlBlockStack.stack[len(controlBlockStack.stack)-1-int(ln)]
-			var defaultLabelType []ValueType
-			// Below, we might modify the slice in case of unreachable. Therefore,
-			// we have to copy the content of block result types, otherwise the original
-			// function type might result in invalid value types if the block is the outermost label
-			// which equals the function's type.
-			if lnLabel.op != OpcodeLoop { // Loop operation doesn't require results since the continuation is the beginning of the loop.
-				defaultLabelType = make([]ValueType, len(lnLabel.blockType.Results))
-				copy(defaultLabelType, lnLabel.blockType.Results)
-			} else {
-				defaultLabelType = make([]ValueType, len(lnLabel.blockType.Params))
-				copy(defaultLabelType, lnLabel.blockType.Params)
-			}
-
-			if enabledFeatures.IsEnabled(api.CoreFeatureReferenceTypes) {
-				// As of reference-types proposal, br_table on unreachable state
-				// can choose unknown types for expected parameter types for each label.
-				// https://github.com/WebAssembly/reference-types/pull/116
-				for i := range defaultLabelType {
-					index := len(defaultLabelType) - 1 - i
-					exp := defaultLabelType[index]
-					actual, err := valueTypeStack.pop()
-					if err != nil {
-						return err
-					}
-					if actual == valueTypeUnknown {
-						// Re-assign the expected type to unknown.
-						defaultLabelType[index] = valueTypeUnknown
-					} else if actual != exp {
-						return typeMismatchError(true, OpcodeBrTableName, actual, exp, i)
-					}
-				}
-			} else {
-				if err = valueTypeStack.popResults(op, defaultLabelType, false); err != nil {
-					return err
-				}
-			}
-
-			for _, l := range sts.ls {
-				if int(l) >= len(controlBlockStack.stack) {
-					return fmt.Errorf("invalid l param given for %s", OpcodeBrTableName)
-				}
-				label := &controlBlockStack.stack[len(controlBlockStack.stack)-1-int(l)]
-				var tableLabelType []ValueType
-				if label.op != OpcodeLoop {
-					tableLabelType = label.blockType.Results
-				} else {
-					tableLabelType = label.blockType.Params
-				}
-				if len(defaultLabelType) != len(tableLabelType) {
-					return fmt.Errorf("inconsistent block type length for %s at %d; %v (ln=%d) != %v (l=%d)", OpcodeBrTableName, l, defaultLabelType, ln, tableLabelType, l)
-				}
-				for i := range defaultLabelType {
-					if defaultLabelType[i] != valueTypeUnknown && defaultLabelType[i] != tableLabelType[i] {
-						return fmt.Errorf("incosistent block type for %s at %d", OpcodeBrTableName, l)
-					}
-				}
-			}
-
-			// br_table instruction is stack-polymorphic.
-			valueTypeStack.unreachable()
-		} else if op == OpcodeCall {
-			pc++
-			index, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			}
-			pc += num - 1
-			if int(index) >= len(functions) {
-				return fmt.Errorf("invalid function index")
-			}
-			funcType := &m.TypeSection[functions[index]]
-			for i := 0; i < len(funcType.Params); i++ {
-				if err := valueTypeStack.popAndVerifyType(funcType.Params[len(funcType.Params)-1-i]); err != nil {
-					return fmt.Errorf("type mismatch on %s operation param type: %v", OpcodeCallName, err)
-				}
-			}
-			for _, exp := range funcType.Results {
-				valueTypeStack.push(exp)
-			}
-		} else if op == OpcodeCallIndirect {
-			pc++
-			typeIndex, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			}
-			pc += num
-
-			if int(typeIndex) >= len(m.TypeSection) {
-				return fmt.Errorf("invalid type index at %s: %d", OpcodeCallIndirectName, typeIndex)
-			}
-
-			tableIndex, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read table index: %v", err)
-			}
-			pc += num - 1
-			if tableIndex != 0 {
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-					return fmt.Errorf("table index must be zero but was %d: %w", tableIndex, err)
-				}
-			}
-
-			if tableIndex >= uint32(len(tables)) {
-				return fmt.Errorf("unknown table index: %d", tableIndex)
-			}
-
-			table := tables[tableIndex]
-			if table.Type != RefTypeFuncref {
-				return fmt.Errorf("table is not funcref type but was %s for %s", RefTypeName(table.Type), OpcodeCallIndirectName)
-			}
-
-			if err = valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-				return fmt.Errorf("cannot pop the offset in table for %s", OpcodeCallIndirectName)
-			}
-			funcType := &m.TypeSection[typeIndex]
-			for i := 0; i < len(funcType.Params); i++ {
-				if err = valueTypeStack.popAndVerifyType(funcType.Params[len(funcType.Params)-1-i]); err != nil {
-					return fmt.Errorf("type mismatch on %s operation input type", OpcodeCallIndirectName)
-				}
-			}
-			for _, exp := range funcType.Results {
-				valueTypeStack.push(exp)
-			}
-		} else if OpcodeI32Eqz <= op && op <= OpcodeI64Extend32S {
-			switch op {
-			case OpcodeI32Eqz:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32EqzName, err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32Eq, OpcodeI32Ne, OpcodeI32LtS,
-				OpcodeI32LtU, OpcodeI32GtS, OpcodeI32GtU, OpcodeI32LeS,
-				OpcodeI32LeU, OpcodeI32GeS, OpcodeI32GeU:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the 1st i32 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the 2nd i32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Eqz:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI64EqzName, err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Eq, OpcodeI64Ne, OpcodeI64LtS,
-				OpcodeI64LtU, OpcodeI64GtS, OpcodeI64GtU,
-				OpcodeI64LeS, OpcodeI64LeU, OpcodeI64GeS, OpcodeI64GeU:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the 1st i64 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the 2nd i64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeF32Eq, OpcodeF32Ne, OpcodeF32Lt, OpcodeF32Gt, OpcodeF32Le, OpcodeF32Ge:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the 2nd f32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeF64Eq, OpcodeF64Ne, OpcodeF64Lt, OpcodeF64Gt, OpcodeF64Le, OpcodeF64Ge:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the 2nd f64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32Clz, OpcodeI32Ctz, OpcodeI32Popcnt:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32Add, OpcodeI32Sub, OpcodeI32Mul, OpcodeI32DivS,
-				OpcodeI32DivU, OpcodeI32RemS, OpcodeI32RemU, OpcodeI32And,
-				OpcodeI32Or, OpcodeI32Xor, OpcodeI32Shl, OpcodeI32ShrS,
-				OpcodeI32ShrU, OpcodeI32Rotl, OpcodeI32Rotr:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the 1st operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the 2nd operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Clz, OpcodeI64Ctz, OpcodeI64Popcnt:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI64Add, OpcodeI64Sub, OpcodeI64Mul, OpcodeI64DivS,
-				OpcodeI64DivU, OpcodeI64RemS, OpcodeI64RemU, OpcodeI64And,
-				OpcodeI64Or, OpcodeI64Xor, OpcodeI64Shl, OpcodeI64ShrS,
-				OpcodeI64ShrU, OpcodeI64Rotl, OpcodeI64Rotr:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the 1st i64 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the 2nd i64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeF32Abs, OpcodeF32Neg, OpcodeF32Ceil,
-				OpcodeF32Floor, OpcodeF32Trunc, OpcodeF32Nearest,
-				OpcodeF32Sqrt:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF32Add, OpcodeF32Sub, OpcodeF32Mul,
-				OpcodeF32Div, OpcodeF32Min, OpcodeF32Max,
-				OpcodeF32Copysign:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the 2nd f32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF64Abs, OpcodeF64Neg, OpcodeF64Ceil,
-				OpcodeF64Floor, OpcodeF64Trunc, OpcodeF64Nearest,
-				OpcodeF64Sqrt:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeF64Add, OpcodeF64Sub, OpcodeF64Mul,
-				OpcodeF64Div, OpcodeF64Min, OpcodeF64Max,
-				OpcodeF64Copysign:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the 2nd f64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeI32WrapI64:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32WrapI64Name, err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32TruncF32S, OpcodeI32TruncF32U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the f32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI32TruncF64S, OpcodeI32TruncF64U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the f64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64ExtendI32S, OpcodeI64ExtendI32U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI64TruncF32S, OpcodeI64TruncF32U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the f32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeI64TruncF64S, OpcodeI64TruncF64U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the f64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeF32ConvertI32S, OpcodeF32ConvertI32U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF32ConvertI64S, OpcodeF32ConvertI64U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF32DemoteF64:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF32DemoteF64Name, err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF64ConvertI32S, OpcodeF64ConvertI32U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeF64ConvertI64S, OpcodeF64ConvertI64U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeF64PromoteF32:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF64PromoteF32Name, err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeI32ReinterpretF32:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32ReinterpretF32Name, err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64ReinterpretF64:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI64ReinterpretF64Name, err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeF32ReinterpretI32:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF32ReinterpretI32Name, err)
-				}
-				valueTypeStack.push(ValueTypeF32)
-			case OpcodeF64ReinterpretI64:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF64ReinterpretI64Name, err)
-				}
-				valueTypeStack.push(ValueTypeF64)
-			case OpcodeI32Extend8S, OpcodeI32Extend16S:
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureSignExtensionOps); err != nil {
-					return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", instructionNames[op], err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeI64Extend8S, OpcodeI64Extend16S, OpcodeI64Extend32S:
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureSignExtensionOps); err != nil {
-					return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", instructionNames[op], err)
-				}
-				valueTypeStack.push(ValueTypeI64)
-			default:
-				return fmt.Errorf("invalid numeric instruction 0x%x", op)
-			}
-		} else if op >= OpcodeRefNull && op <= OpcodeRefFunc {
-			if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-				return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
-			}
-			switch op {
-			case OpcodeRefNull:
-				pc++
-				switch reftype := body[pc]; reftype {
-				case ValueTypeExternref:
-					valueTypeStack.push(ValueTypeExternref)
-				case ValueTypeFuncref:
-					valueTypeStack.push(ValueTypeFuncref)
-				default:
-					return fmt.Errorf("unknown type for ref.null: 0x%x", reftype)
-				}
-			case OpcodeRefIsNull:
-				tp, err := valueTypeStack.pop()
-				if err != nil {
-					return fmt.Errorf("cannot pop the operand for ref.is_null: %v", err)
-				} else if !isReferenceValueType(tp) && tp != valueTypeUnknown {
-					return fmt.Errorf("type mismatch: expected reference type but was %s", ValueTypeName(tp))
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeRefFunc:
-				pc++
-				index, num, err := leb128.LoadUint32(body[pc:])
-				if err != nil {
-					return fmt.Errorf("failed to read function index for ref.func: %v", err)
-				}
-				if _, ok := declaredFunctionIndexes[index]; !ok {
-					return fmt.Errorf("undeclared function index %d for ref.func", index)
-				}
-				pc += num - 1
-				valueTypeStack.push(ValueTypeFuncref)
-			}
-		} else if op == OpcodeTableGet || op == OpcodeTableSet {
-			if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-				return fmt.Errorf("%s is invalid as %v", InstructionName(op), err)
-			}
-			pc++
-			tableIndex, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("read immediate: %v", err)
-			}
-			if tableIndex >= uint32(len(tables)) {
-				return fmt.Errorf("table of index %d not found", tableIndex)
-			}
-
-			refType := tables[tableIndex].Type
-			if op == OpcodeTableGet {
-				if err := valueTypeStack.popAndVerifyType(api.ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for table.get: %v", err)
-				}
-				valueTypeStack.push(refType)
-			} else {
-				if err := valueTypeStack.popAndVerifyType(refType); err != nil {
-					return fmt.Errorf("cannot pop the operand for table.set: %v", err)
-				}
-				if err := valueTypeStack.popAndVerifyType(api.ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for table.set: %v", err)
-				}
-			}
-			pc += num - 1
-		} else if op == OpcodeMiscPrefix {
-			pc++
-			// A misc opcode is encoded as an unsigned variable 32-bit integer.
-			miscOp32, num, err := leb128.LoadUint32(body[pc:])
-			if err != nil {
-				return fmt.Errorf("failed to read misc opcode: %v", err)
-			}
-			pc += num - 1
-			miscOpcode := byte(miscOp32)
-			// If the misc opcode is beyond byte range, it is highly likely this is an invalid binary, or
-			// it is due to the new opcode from a new proposal. In the latter case, we have to
-			// change the alias type of OpcodeMisc (which is currently byte) to uint32.
-			if uint32(byte(miscOp32)) != miscOp32 {
-				return fmt.Errorf("invalid misc opcode: %#x", miscOp32)
-			}
-			if miscOpcode >= OpcodeMiscI32TruncSatF32S && miscOpcode <= OpcodeMiscI64TruncSatF64U {
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureNonTrappingFloatToIntConversion); err != nil {
-					return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
-				}
-				var inType, outType ValueType
-				switch miscOpcode {
-				case OpcodeMiscI32TruncSatF32S, OpcodeMiscI32TruncSatF32U:
-					inType, outType = ValueTypeF32, ValueTypeI32
-				case OpcodeMiscI32TruncSatF64S, OpcodeMiscI32TruncSatF64U:
-					inType, outType = ValueTypeF64, ValueTypeI32
-				case OpcodeMiscI64TruncSatF32S, OpcodeMiscI64TruncSatF32U:
-					inType, outType = ValueTypeF32, ValueTypeI64
-				case OpcodeMiscI64TruncSatF64S, OpcodeMiscI64TruncSatF64U:
-					inType, outType = ValueTypeF64, ValueTypeI64
-				}
-				if err := valueTypeStack.popAndVerifyType(inType); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
-				}
-				valueTypeStack.push(outType)
-			} else if miscOpcode >= OpcodeMiscMemoryInit && miscOpcode <= OpcodeMiscTableCopy {
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureBulkMemoryOperations); err != nil {
-					return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
-				}
-				var params []ValueType
-				// Handle opcodes added in bulk-memory-operations/WebAssembly 2.0.
-				switch miscOpcode {
-				case OpcodeMiscDataDrop:
-					if m.DataCountSection == nil {
-						return fmt.Errorf("%s requires data count section", MiscInstructionName(miscOpcode))
-					}
-
-					// We need to read the index to the data section.
-					pc++
-					index, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read data segment index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if int(index) >= len(m.DataSection) {
-						return fmt.Errorf("index %d out of range of data section(len=%d)", index, len(m.DataSection))
-					}
-					pc += num - 1
-				case OpcodeMiscMemoryInit, OpcodeMiscMemoryCopy, OpcodeMiscMemoryFill:
-					if memory == nil {
-						return fmt.Errorf("memory must exist for %s", MiscInstructionName(miscOpcode))
-					}
-					params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
-
-					if miscOpcode == OpcodeMiscMemoryInit {
-						if m.DataCountSection == nil {
-							return fmt.Errorf("%s requires data count section", MiscInstructionName(miscOpcode))
-						}
-
-						// We need to read the index to the data section.
-						pc++
-						index, num, err := leb128.LoadUint32(body[pc:])
-						if err != nil {
-							return fmt.Errorf("failed to read data segment index for %s: %v", MiscInstructionName(miscOpcode), err)
-						}
-						if int(index) >= len(m.DataSection) {
-							return fmt.Errorf("index %d out of range of data section(len=%d)", index, len(m.DataSection))
-						}
-						pc += num - 1
-					}
-
-					pc++
-					val, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read memory index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if val != 0 || num != 1 {
-						return fmt.Errorf("%s reserved byte must be zero encoded with 1 byte", MiscInstructionName(miscOpcode))
-					}
-					if miscOpcode == OpcodeMiscMemoryCopy {
-						pc++
-						// memory.copy needs two memory index which are reserved as zero.
-						val, num, err := leb128.LoadUint32(body[pc:])
-						if err != nil {
-							return fmt.Errorf("failed to read memory index for %s: %v", MiscInstructionName(miscOpcode), err)
-						}
-						if val != 0 || num != 1 {
-							return fmt.Errorf("%s reserved byte must be zero encoded with 1 byte", MiscInstructionName(miscOpcode))
-						}
-					}
-
-				case OpcodeMiscTableInit:
-					params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
-					pc++
-					elementIndex, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read element segment index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if int(elementIndex) >= len(m.ElementSection) {
-						return fmt.Errorf("index %d out of range of element section(len=%d)", elementIndex, len(m.ElementSection))
-					}
-					pc += num
-
-					tableIndex, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read source table index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if tableIndex != 0 {
-						if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-							return fmt.Errorf("source table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
-						}
-					}
-					if tableIndex >= uint32(len(tables)) {
-						return fmt.Errorf("table of index %d not found", tableIndex)
-					}
-
-					if m.ElementSection[elementIndex].Type != tables[tableIndex].Type {
-						return fmt.Errorf("type mismatch for table.init: element type %s does not match table type %s",
-							RefTypeName(m.ElementSection[elementIndex].Type),
-							RefTypeName(tables[tableIndex].Type),
-						)
-					}
-					pc += num - 1
-				case OpcodeMiscElemDrop:
-					pc++
-					elementIndex, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read element segment index for %s: %v", MiscInstructionName(miscOpcode), err)
-					} else if int(elementIndex) >= len(m.ElementSection) {
-						return fmt.Errorf("index %d out of range of element section(len=%d)", elementIndex, len(m.ElementSection))
-					}
-					pc += num - 1
-				case OpcodeMiscTableCopy:
-					params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
-					pc++
-
-					dstTableIndex, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read destination table index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if dstTableIndex != 0 {
-						if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-							return fmt.Errorf("destination table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
-						}
-					}
-					if dstTableIndex >= uint32(len(tables)) {
-						return fmt.Errorf("table of index %d not found", dstTableIndex)
-					}
-					pc += num
-
-					srcTableIndex, num, err := leb128.LoadUint32(body[pc:])
-					if err != nil {
-						return fmt.Errorf("failed to read source table index for %s: %v", MiscInstructionName(miscOpcode), err)
-					}
-					if srcTableIndex != 0 {
-						if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-							return fmt.Errorf("source table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
-						}
-					}
-					if srcTableIndex >= uint32(len(tables)) {
-						return fmt.Errorf("table of index %d not found", srcTableIndex)
-					}
-
-					if tables[srcTableIndex].Type != tables[dstTableIndex].Type {
-						return fmt.Errorf("table type mismatch for table.copy: %s (src) != %s (dst)",
-							RefTypeName(tables[srcTableIndex].Type), RefTypeName(tables[dstTableIndex].Type))
-					}
-
-					pc += num - 1
-				}
-				for _, p := range params {
-					if err := valueTypeStack.popAndVerifyType(p); err != nil {
-						return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
-					}
-				}
-			} else if miscOpcode >= OpcodeMiscTableGrow && miscOpcode <= OpcodeMiscTableFill {
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-					return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
-				}
-
-				pc++
-				tableIndex, num, err := leb128.LoadUint32(body[pc:])
-				if err != nil {
-					return fmt.Errorf("failed to read table index for %s: %v", MiscInstructionName(miscOpcode), err)
-				}
-				if tableIndex >= uint32(len(tables)) {
-					return fmt.Errorf("table of index %d not found", tableIndex)
-				}
-				pc += num - 1
-
-				var params, results []ValueType
-				reftype := tables[tableIndex].Type
-				if miscOpcode == OpcodeMiscTableGrow {
-					params = []ValueType{ValueTypeI32, reftype}
-					results = []ValueType{ValueTypeI32}
-				} else if miscOpcode == OpcodeMiscTableSize {
-					results = []ValueType{ValueTypeI32}
-				} else if miscOpcode == OpcodeMiscTableFill {
-					params = []ValueType{ValueTypeI32, reftype, ValueTypeI32}
-				}
-
-				for _, p := range params {
-					if err := valueTypeStack.popAndVerifyType(p); err != nil {
-						return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
-					}
-				}
-				for _, r := range results {
-					valueTypeStack.push(r)
-				}
-			} else {
-				return fmt.Errorf("unknown misc opcode %#x", miscOpcode)
-			}
-		} else if op == OpcodeVecPrefix {
-			pc++
-			// Vector instructions come with two bytes where the first byte is always OpcodeVecPrefix,
-			// and the second byte determines the actual instruction.
-			vecOpcode := body[pc]
-			if err := enabledFeatures.RequireEnabled(api.CoreFeatureSIMD); err != nil {
-				return fmt.Errorf("%s invalid as %v", vectorInstructionName[vecOpcode], err)
-			}
-
-			switch vecOpcode {
-			case OpcodeVecV128Const:
-				// Read 128-bit = 16 bytes constants
-				if int(pc+16) >= len(body) {
-					return fmt.Errorf("cannot read constant vector value for %s", vectorInstructionName[vecOpcode])
-				}
-				pc += 16
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128AnyTrue, OpcodeVecI8x16AllTrue, OpcodeVecI16x8AllTrue, OpcodeVecI32x4AllTrue, OpcodeVecI64x2AllTrue,
-				OpcodeVecI8x16BitMask, OpcodeVecI16x8BitMask, OpcodeVecI32x4BitMask, OpcodeVecI64x2BitMask:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeVecV128Load, OpcodeVecV128Load8x8s, OpcodeVecV128Load8x8u, OpcodeVecV128Load16x4s, OpcodeVecV128Load16x4u,
-				OpcodeVecV128Load32x2s, OpcodeVecV128Load32x2u, OpcodeVecV128Load8Splat, OpcodeVecV128Load16Splat,
-				OpcodeVecV128Load32Splat, OpcodeVecV128Load64Splat,
-				OpcodeVecV128Load32zero, OpcodeVecV128Load64zero:
-				if memory == nil {
-					return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
-				}
-				pc++
-				align, _, read, err := readMemArg(pc, body)
-				if err != nil {
-					return err
-				}
-				pc += read - 1
-				var maxAlign uint32
-				switch vecOpcode {
-				case OpcodeVecV128Load:
-					maxAlign = 128 / 8
-				case OpcodeVecV128Load8x8s, OpcodeVecV128Load8x8u, OpcodeVecV128Load16x4s, OpcodeVecV128Load16x4u,
-					OpcodeVecV128Load32x2s, OpcodeVecV128Load32x2u:
-					maxAlign = 64 / 8
-				case OpcodeVecV128Load8Splat:
-					maxAlign = 1
-				case OpcodeVecV128Load16Splat:
-					maxAlign = 16 / 8
-				case OpcodeVecV128Load32Splat:
-					maxAlign = 32 / 8
-				case OpcodeVecV128Load64Splat:
-					maxAlign = 64 / 8
-				case OpcodeVecV128Load32zero:
-					maxAlign = 32 / 8
-				case OpcodeVecV128Load64zero:
-					maxAlign = 64 / 8
-				}
-
-				if 1<<align > maxAlign {
-					return fmt.Errorf("invalid memory alignment %d for %s", align, VectorInstructionName(vecOpcode))
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", VectorInstructionName(vecOpcode), err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128Store:
-				if memory == nil {
-					return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
-				}
-				pc++
-				align, _, read, err := readMemArg(pc, body)
-				if err != nil {
-					return err
-				}
-				pc += read - 1
-				if 1<<align > 128/8 {
-					return fmt.Errorf("invalid memory alignment %d for %s", align, OpcodeVecV128StoreName)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeVecV128StoreName, err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeVecV128StoreName, err)
-				}
-			case OpcodeVecV128Load8Lane, OpcodeVecV128Load16Lane, OpcodeVecV128Load32Lane, OpcodeVecV128Load64Lane:
-				if memory == nil {
-					return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
-				}
-				attr := vecLoadLanes[vecOpcode]
-				pc++
-				align, _, read, err := readMemArg(pc, body)
-				if err != nil {
-					return err
-				}
-				if 1<<align > attr.alignMax {
-					return fmt.Errorf("invalid memory alignment %d for %s", align, vectorInstructionName[vecOpcode])
-				}
-				pc += read
-				if pc >= uint64(len(body)) {
-					return fmt.Errorf("lane for %s not found", OpcodeVecV128Load64LaneName)
-				}
-				lane := body[pc]
-				if lane >= attr.laneCeil {
-					return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128Store8Lane, OpcodeVecV128Store16Lane, OpcodeVecV128Store32Lane, OpcodeVecV128Store64Lane:
-				if memory == nil {
-					return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
-				}
-				attr := vecStoreLanes[vecOpcode]
-				pc++
-				align, _, read, err := readMemArg(pc, body)
-				if err != nil {
-					return err
-				}
-				if 1<<align > attr.alignMax {
-					return fmt.Errorf("invalid memory alignment %d for %s", align, vectorInstructionName[vecOpcode])
-				}
-				pc += read
-				if pc >= uint64(len(body)) {
-					return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
-				}
-				lane := body[pc]
-				if lane >= attr.laneCeil {
-					return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-			case OpcodeVecI8x16ExtractLaneS,
-				OpcodeVecI8x16ExtractLaneU,
-				OpcodeVecI16x8ExtractLaneS,
-				OpcodeVecI16x8ExtractLaneU,
-				OpcodeVecI32x4ExtractLane,
-				OpcodeVecI64x2ExtractLane,
-				OpcodeVecF32x4ExtractLane,
-				OpcodeVecF64x2ExtractLane:
-				pc++
-				if pc >= uint64(len(body)) {
-					return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
-				}
-				attr := vecExtractLanes[vecOpcode]
-				lane := body[pc]
-				if lane >= attr.laneCeil {
-					return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(attr.resultType)
-			case OpcodeVecI8x16ReplaceLane, OpcodeVecI16x8ReplaceLane, OpcodeVecI32x4ReplaceLane,
-				OpcodeVecI64x2ReplaceLane, OpcodeVecF32x4ReplaceLane, OpcodeVecF64x2ReplaceLane:
-				pc++
-				if pc >= uint64(len(body)) {
-					return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
-				}
-				attr := vecReplaceLanes[vecOpcode]
-				lane := body[pc]
-				if lane >= attr.laneCeil {
-					return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
-				}
-				if err := valueTypeStack.popAndVerifyType(attr.paramType); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecI8x16Splat, OpcodeVecI16x8Splat, OpcodeVecI32x4Splat,
-				OpcodeVecI64x2Splat, OpcodeVecF32x4Splat, OpcodeVecF64x2Splat:
-				tp := vecSplatValueTypes[vecOpcode]
-				if err := valueTypeStack.popAndVerifyType(tp); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecI8x16Swizzle, OpcodeVecV128And, OpcodeVecV128Or, OpcodeVecV128Xor, OpcodeVecV128AndNot:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128Bitselect:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128Not:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecV128i8x16Shuffle:
-				pc++
-				if pc+15 >= uint64(len(body)) {
-					return fmt.Errorf("16 lane indexes for %s not found", vectorInstructionName[vecOpcode])
-				}
-				lanes := body[pc : pc+16]
-				for i, l := range lanes {
-					if l >= 32 {
-						return fmt.Errorf("invalid lane index[%d] %d >= %d for %s", i, l, 32, vectorInstructionName[vecOpcode])
-					}
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-				pc += 15
-			case OpcodeVecI8x16Shl, OpcodeVecI8x16ShrS, OpcodeVecI8x16ShrU,
-				OpcodeVecI16x8Shl, OpcodeVecI16x8ShrS, OpcodeVecI16x8ShrU,
-				OpcodeVecI32x4Shl, OpcodeVecI32x4ShrS, OpcodeVecI32x4ShrU,
-				OpcodeVecI64x2Shl, OpcodeVecI64x2ShrS, OpcodeVecI64x2ShrU:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecI8x16Eq, OpcodeVecI8x16Ne, OpcodeVecI8x16LtS, OpcodeVecI8x16LtU, OpcodeVecI8x16GtS,
-				OpcodeVecI8x16GtU, OpcodeVecI8x16LeS, OpcodeVecI8x16LeU, OpcodeVecI8x16GeS, OpcodeVecI8x16GeU,
-				OpcodeVecI16x8Eq, OpcodeVecI16x8Ne, OpcodeVecI16x8LtS, OpcodeVecI16x8LtU, OpcodeVecI16x8GtS,
-				OpcodeVecI16x8GtU, OpcodeVecI16x8LeS, OpcodeVecI16x8LeU, OpcodeVecI16x8GeS, OpcodeVecI16x8GeU,
-				OpcodeVecI32x4Eq, OpcodeVecI32x4Ne, OpcodeVecI32x4LtS, OpcodeVecI32x4LtU, OpcodeVecI32x4GtS,
-				OpcodeVecI32x4GtU, OpcodeVecI32x4LeS, OpcodeVecI32x4LeU, OpcodeVecI32x4GeS, OpcodeVecI32x4GeU,
-				OpcodeVecI64x2Eq, OpcodeVecI64x2Ne, OpcodeVecI64x2LtS, OpcodeVecI64x2GtS, OpcodeVecI64x2LeS,
-				OpcodeVecI64x2GeS, OpcodeVecF32x4Eq, OpcodeVecF32x4Ne, OpcodeVecF32x4Lt, OpcodeVecF32x4Gt,
-				OpcodeVecF32x4Le, OpcodeVecF32x4Ge, OpcodeVecF64x2Eq, OpcodeVecF64x2Ne, OpcodeVecF64x2Lt,
-				OpcodeVecF64x2Gt, OpcodeVecF64x2Le, OpcodeVecF64x2Ge,
-				OpcodeVecI32x4DotI16x8S,
-				OpcodeVecI8x16NarrowI16x8S, OpcodeVecI8x16NarrowI16x8U, OpcodeVecI16x8NarrowI32x4S, OpcodeVecI16x8NarrowI32x4U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			case OpcodeVecI8x16Neg, OpcodeVecI16x8Neg, OpcodeVecI32x4Neg, OpcodeVecI64x2Neg, OpcodeVecF32x4Neg, OpcodeVecF64x2Neg,
-				OpcodeVecF32x4Sqrt, OpcodeVecF64x2Sqrt,
-				OpcodeVecI8x16Abs, OpcodeVecI8x16Popcnt, OpcodeVecI16x8Abs, OpcodeVecI32x4Abs, OpcodeVecI64x2Abs,
-				OpcodeVecF32x4Abs, OpcodeVecF64x2Abs,
-				OpcodeVecF32x4Ceil, OpcodeVecF32x4Floor, OpcodeVecF32x4Trunc, OpcodeVecF32x4Nearest,
-				OpcodeVecF64x2Ceil, OpcodeVecF64x2Floor, OpcodeVecF64x2Trunc, OpcodeVecF64x2Nearest,
-				OpcodeVecI16x8ExtendLowI8x16S, OpcodeVecI16x8ExtendHighI8x16S, OpcodeVecI16x8ExtendLowI8x16U, OpcodeVecI16x8ExtendHighI8x16U,
-				OpcodeVecI32x4ExtendLowI16x8S, OpcodeVecI32x4ExtendHighI16x8S, OpcodeVecI32x4ExtendLowI16x8U, OpcodeVecI32x4ExtendHighI16x8U,
-				OpcodeVecI64x2ExtendLowI32x4S, OpcodeVecI64x2ExtendHighI32x4S, OpcodeVecI64x2ExtendLowI32x4U, OpcodeVecI64x2ExtendHighI32x4U,
-				OpcodeVecI16x8ExtaddPairwiseI8x16S, OpcodeVecI16x8ExtaddPairwiseI8x16U,
-				OpcodeVecI32x4ExtaddPairwiseI16x8S, OpcodeVecI32x4ExtaddPairwiseI16x8U,
-				OpcodeVecF64x2PromoteLowF32x4Zero, OpcodeVecF32x4DemoteF64x2Zero,
-				OpcodeVecF32x4ConvertI32x4S, OpcodeVecF32x4ConvertI32x4U,
-				OpcodeVecF64x2ConvertLowI32x4S, OpcodeVecF64x2ConvertLowI32x4U,
-				OpcodeVecI32x4TruncSatF32x4S, OpcodeVecI32x4TruncSatF32x4U, OpcodeVecI32x4TruncSatF64x2SZero, OpcodeVecI32x4TruncSatF64x2UZero:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-
-			case OpcodeVecI8x16Add, OpcodeVecI8x16AddSatS, OpcodeVecI8x16AddSatU, OpcodeVecI8x16Sub, OpcodeVecI8x16SubSatS, OpcodeVecI8x16SubSatU,
-				OpcodeVecI16x8Add, OpcodeVecI16x8AddSatS, OpcodeVecI16x8AddSatU, OpcodeVecI16x8Sub, OpcodeVecI16x8SubSatS, OpcodeVecI16x8SubSatU, OpcodeVecI16x8Mul,
-				OpcodeVecI32x4Add, OpcodeVecI32x4Sub, OpcodeVecI32x4Mul,
-				OpcodeVecI64x2Add, OpcodeVecI64x2Sub, OpcodeVecI64x2Mul,
-				OpcodeVecF32x4Add, OpcodeVecF32x4Sub, OpcodeVecF32x4Mul, OpcodeVecF32x4Div,
-				OpcodeVecF64x2Add, OpcodeVecF64x2Sub, OpcodeVecF64x2Mul, OpcodeVecF64x2Div,
-				OpcodeVecI8x16MinS, OpcodeVecI8x16MinU, OpcodeVecI8x16MaxS, OpcodeVecI8x16MaxU,
-				OpcodeVecI8x16AvgrU,
-				OpcodeVecI16x8MinS, OpcodeVecI16x8MinU, OpcodeVecI16x8MaxS, OpcodeVecI16x8MaxU,
-				OpcodeVecI16x8AvgrU,
-				OpcodeVecI32x4MinS, OpcodeVecI32x4MinU, OpcodeVecI32x4MaxS, OpcodeVecI32x4MaxU,
-				OpcodeVecF32x4Min, OpcodeVecF32x4Max, OpcodeVecF64x2Min, OpcodeVecF64x2Max,
-				OpcodeVecF32x4Pmin, OpcodeVecF32x4Pmax, OpcodeVecF64x2Pmin, OpcodeVecF64x2Pmax,
-				OpcodeVecI16x8Q15mulrSatS,
-				OpcodeVecI16x8ExtMulLowI8x16S, OpcodeVecI16x8ExtMulHighI8x16S, OpcodeVecI16x8ExtMulLowI8x16U, OpcodeVecI16x8ExtMulHighI8x16U,
-				OpcodeVecI32x4ExtMulLowI16x8S, OpcodeVecI32x4ExtMulHighI16x8S, OpcodeVecI32x4ExtMulLowI16x8U, OpcodeVecI32x4ExtMulHighI16x8U,
-				OpcodeVecI64x2ExtMulLowI32x4S, OpcodeVecI64x2ExtMulHighI32x4S, OpcodeVecI64x2ExtMulLowI32x4U, OpcodeVecI64x2ExtMulHighI32x4U:
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
-					return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
-				}
-				valueTypeStack.push(ValueTypeV128)
-			default:
-				return fmt.Errorf("unknown SIMD instruction %s", vectorInstructionName[vecOpcode])
-			}
-		} else if op == OpcodeBlock {
-			br.Reset(body[pc+1:])
-			bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
-			if err != nil {
-				return fmt.Errorf("read block: %w", err)
-			}
-			controlBlockStack.push(pc, 0, 0, bt, num, 0)
-			if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
-				return err
-			}
-			// Plus we have to push any block params again.
-			for _, p := range bt.Params {
-				valueTypeStack.push(p)
-			}
-			valueTypeStack.pushStackLimit(len(bt.Params))
-			pc += num
-		} else if op == OpcodeAtomicPrefix {
-			pc++
-			// Atomic instructions come with two bytes where the first byte is always OpcodeAtomicPrefix,
-			// and the second byte determines the actual instruction.
-			atomicOpcode := body[pc]
-			if err := enabledFeatures.RequireEnabled(experimental.CoreFeaturesThreads); err != nil {
-				return fmt.Errorf("%s invalid as %v", atomicInstructionName[atomicOpcode], err)
-			}
-			pc++
-
-			if atomicOpcode == OpcodeAtomicFence {
-				// No memory requirement and no arguments or return, however the immediate byte value must be 0.
-				imm := body[pc]
-				if imm != 0x0 {
-					return fmt.Errorf("invalid immediate value for %s", AtomicInstructionName(atomicOpcode))
-				}
-				continue
-			}
-
-			// All atomic operations except fence (checked above) require memory
-			if memory == nil {
-				return fmt.Errorf("memory must exist for %s", AtomicInstructionName(atomicOpcode))
-			}
-			align, _, read, err := readMemArg(pc, body)
-			if err != nil {
-				return err
-			}
-			pc += read - 1
-			switch atomicOpcode {
-			case OpcodeAtomicMemoryNotify:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicMemoryWait32:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicMemoryWait64:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Load:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI64Load:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI32Load8U:
-				if 1<<align != 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Load16U:
-				if 1<<align != 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI64Load8U:
-				if 1<<align != 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Load16U:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Load32U:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI32Store:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI64Store:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI32Store8:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI32Store16:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI64Store8:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI64Store16:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI64Store32:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-			case OpcodeAtomicI32RmwAdd, OpcodeAtomicI32RmwSub, OpcodeAtomicI32RmwAnd, OpcodeAtomicI32RmwOr, OpcodeAtomicI32RmwXor, OpcodeAtomicI32RmwXchg:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Rmw8AddU, OpcodeAtomicI32Rmw8SubU, OpcodeAtomicI32Rmw8AndU, OpcodeAtomicI32Rmw8OrU, OpcodeAtomicI32Rmw8XorU, OpcodeAtomicI32Rmw8XchgU:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Rmw16AddU, OpcodeAtomicI32Rmw16SubU, OpcodeAtomicI32Rmw16AndU, OpcodeAtomicI32Rmw16OrU, OpcodeAtomicI32Rmw16XorU, OpcodeAtomicI32Rmw16XchgU:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI64RmwAdd, OpcodeAtomicI64RmwSub, OpcodeAtomicI64RmwAnd, OpcodeAtomicI64RmwOr, OpcodeAtomicI64RmwXor, OpcodeAtomicI64RmwXchg:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw8AddU, OpcodeAtomicI64Rmw8SubU, OpcodeAtomicI64Rmw8AndU, OpcodeAtomicI64Rmw8OrU, OpcodeAtomicI64Rmw8XorU, OpcodeAtomicI64Rmw8XchgU:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw16AddU, OpcodeAtomicI64Rmw16SubU, OpcodeAtomicI64Rmw16AndU, OpcodeAtomicI64Rmw16OrU, OpcodeAtomicI64Rmw16XorU, OpcodeAtomicI64Rmw16XchgU:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw32AddU, OpcodeAtomicI64Rmw32SubU, OpcodeAtomicI64Rmw32AndU, OpcodeAtomicI64Rmw32OrU, OpcodeAtomicI64Rmw32XorU, OpcodeAtomicI64Rmw32XchgU:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI32RmwCmpxchg:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Rmw8CmpxchgU:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI32Rmw16CmpxchgU:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI32)
-			case OpcodeAtomicI64RmwCmpxchg:
-				if 1<<align > 64/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw8CmpxchgU:
-				if 1<<align > 1 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw16CmpxchgU:
-				if 1<<align > 16/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			case OpcodeAtomicI64Rmw32CmpxchgU:
-				if 1<<align > 32/8 {
-					return fmt.Errorf("invalid memory alignment")
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
-					return err
-				}
-				if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-					return err
-				}
-				valueTypeStack.push(ValueTypeI64)
-			default:
-				return fmt.Errorf("invalid atomic opcode: 0x%x", atomicOpcode)
-			}
-		} else if op == OpcodeLoop {
-			br.Reset(body[pc+1:])
-			bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
-			if err != nil {
-				return fmt.Errorf("read block: %w", err)
-			}
-			controlBlockStack.push(pc, 0, 0, bt, num, op)
-			if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
-				return err
-			}
-			// Plus we have to push any block params again.
-			for _, p := range bt.Params {
-				valueTypeStack.push(p)
-			}
-			valueTypeStack.pushStackLimit(len(bt.Params))
-			pc += num
-		} else if op == OpcodeIf {
-			br.Reset(body[pc+1:])
-			bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
-			if err != nil {
-				return fmt.Errorf("read block: %w", err)
-			}
-			controlBlockStack.push(pc, 0, 0, bt, num, op)
-			if err = valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-				return fmt.Errorf("cannot pop the operand for 'if': %v", err)
-			}
-			if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
-				return err
-			}
-			// Plus we have to push any block params again.
-			for _, p := range bt.Params {
-				valueTypeStack.push(p)
-			}
-			valueTypeStack.pushStackLimit(len(bt.Params))
-			pc += num
-		} else if op == OpcodeElse {
-			bl := &controlBlockStack.stack[len(controlBlockStack.stack)-1]
-			if bl.op != OpcodeIf {
-				return fmt.Errorf("else instruction must be used in if block: %#x", pc)
-			}
-			bl.op = OpcodeElse
-			bl.elseAt = pc
-			// Check the type soundness of the instructions *before* entering this else Op.
-			if err := valueTypeStack.popResults(OpcodeIf, bl.blockType.Results, true); err != nil {
-				return err
-			}
-			// Before entering instructions inside else, we pop all the values pushed by then block.
-			valueTypeStack.resetAtStackLimit()
-			// Plus we have to push any block params again.
-			for _, p := range bl.blockType.Params {
-				valueTypeStack.push(p)
-			}
-		} else if op == OpcodeEnd {
-			bl := controlBlockStack.pop()
-			bl.endAt = pc
-
-			// OpcodeEnd can end a block or the function itself. Check to see what it is:
-
-			ifMissingElse := bl.op == OpcodeIf && bl.elseAt <= bl.startAt
-			if ifMissingElse {
-				// If this is the end of block without else, the number of block's results and params must be same.
-				// Otherwise, the value stack would result in the inconsistent state at runtime.
-				if !bytes.Equal(bl.blockType.Results, bl.blockType.Params) {
-					return typeCountError(false, OpcodeElseName, bl.blockType.Params, bl.blockType.Results)
-				}
-				// -1 skips else, to handle if block without else properly.
-				bl.elseAt = bl.endAt - 1
-			}
-
-			// Determine the block context
-			ctx := "" // the outer-most block: the function return
-			if bl.op == OpcodeIf && !ifMissingElse && bl.elseAt > 0 {
-				ctx = OpcodeElseName
-			} else if bl.op != 0 {
-				ctx = InstructionName(bl.op)
-			}
-
-			// Check return types match
-			if err := valueTypeStack.requireStackValues(false, ctx, bl.blockType.Results, true); err != nil {
-				return err
-			}
-
-			// Put the result types at the end after resetting at the stack limit
-			// since we might have Any type between the limit and the current top.
-			valueTypeStack.resetAtStackLimit()
-			for _, exp := range bl.blockType.Results {
-				valueTypeStack.push(exp)
-			}
-			// We exit if/loop/block, so reset the constraints on the stack manipulation
-			// on values previously pushed by outer blocks.
-			valueTypeStack.popStackLimit()
-		} else if op == OpcodeReturn {
-			// Same formatting as OpcodeEnd on the outer-most block
-			if err := valueTypeStack.requireStackValues(false, "", functionType.Results, false); err != nil {
-				return err
-			}
-			// return instruction is stack-polymorphic.
-			valueTypeStack.unreachable()
-		} else if op == OpcodeDrop {
-			_, err := valueTypeStack.pop()
-			if err != nil {
-				return fmt.Errorf("invalid drop: %v", err)
-			}
-		} else if op == OpcodeSelect || op == OpcodeTypedSelect {
-			if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
-				return fmt.Errorf("type mismatch on 3rd select operand: %v", err)
-			}
-			v1, err := valueTypeStack.pop()
-			if err != nil {
-				return fmt.Errorf("invalid select: %v", err)
-			}
-			v2, err := valueTypeStack.pop()
-			if err != nil {
-				return fmt.Errorf("invalid select: %v", err)
-			}
-
-			if op == OpcodeTypedSelect {
-				if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
-					return fmt.Errorf("%s is invalid as %w", InstructionName(op), err)
-				}
-				pc++
-				if numTypeImmeidates := body[pc]; numTypeImmeidates != 1 {
-					return fmt.Errorf("too many type immediates for %s", InstructionName(op))
-				}
-				pc++
-				tp := body[pc]
-				if tp != ValueTypeI32 && tp != ValueTypeI64 && tp != ValueTypeF32 && tp != ValueTypeF64 &&
-					tp != api.ValueTypeExternref && tp != ValueTypeFuncref && tp != ValueTypeV128 {
-					return fmt.Errorf("invalid type %s for %s", ValueTypeName(tp), OpcodeTypedSelectName)
-				}
-			} else if isReferenceValueType(v1) || isReferenceValueType(v2) {
-				return fmt.Errorf("reference types cannot be used for non typed select instruction")
-			}
-
-			if v1 != v2 && v1 != valueTypeUnknown && v2 != valueTypeUnknown {
-				return fmt.Errorf("type mismatch on 1st and 2nd select operands")
-			}
-			if v1 == valueTypeUnknown {
-				valueTypeStack.push(v2)
-			} else {
-				valueTypeStack.push(v1)
-			}
-		} else if op == OpcodeUnreachable {
-			// unreachable instruction is stack-polymorphic.
-			valueTypeStack.unreachable()
-		} else if op == OpcodeNop {
-		} else {
-			return fmt.Errorf("invalid instruction 0x%x", op)
-		}
-	}
-
-	if len(controlBlockStack.stack) > 0 {
-		return fmt.Errorf("ill-nested block exists")
-	}
-	if valueTypeStack.maximumStackPointer > maxStackValues {
-		return fmt.Errorf("function may have %d stack values, which exceeds limit %d", valueTypeStack.maximumStackPointer, maxStackValues)
-	}
-	return nil
-}
-
-var vecExtractLanes = [...]struct {
-	laneCeil   byte
-	resultType ValueType
-}{
-	OpcodeVecI8x16ExtractLaneS: {laneCeil: 16, resultType: ValueTypeI32},
-	OpcodeVecI8x16ExtractLaneU: {laneCeil: 16, resultType: ValueTypeI32},
-	OpcodeVecI16x8ExtractLaneS: {laneCeil: 8, resultType: ValueTypeI32},
-	OpcodeVecI16x8ExtractLaneU: {laneCeil: 8, resultType: ValueTypeI32},
-	OpcodeVecI32x4ExtractLane:  {laneCeil: 4, resultType: ValueTypeI32},
-	OpcodeVecI64x2ExtractLane:  {laneCeil: 2, resultType: ValueTypeI64},
-	OpcodeVecF32x4ExtractLane:  {laneCeil: 4, resultType: ValueTypeF32},
-	OpcodeVecF64x2ExtractLane:  {laneCeil: 2, resultType: ValueTypeF64},
-}
-
-var vecReplaceLanes = [...]struct {
-	laneCeil  byte
-	paramType ValueType
-}{
-	OpcodeVecI8x16ReplaceLane: {laneCeil: 16, paramType: ValueTypeI32},
-	OpcodeVecI16x8ReplaceLane: {laneCeil: 8, paramType: ValueTypeI32},
-	OpcodeVecI32x4ReplaceLane: {laneCeil: 4, paramType: ValueTypeI32},
-	OpcodeVecI64x2ReplaceLane: {laneCeil: 2, paramType: ValueTypeI64},
-	OpcodeVecF32x4ReplaceLane: {laneCeil: 4, paramType: ValueTypeF32},
-	OpcodeVecF64x2ReplaceLane: {laneCeil: 2, paramType: ValueTypeF64},
-}
-
-var vecStoreLanes = [...]struct {
-	alignMax uint32
-	laneCeil byte
-}{
-	OpcodeVecV128Store64Lane: {alignMax: 64 / 8, laneCeil: 128 / 64},
-	OpcodeVecV128Store32Lane: {alignMax: 32 / 8, laneCeil: 128 / 32},
-	OpcodeVecV128Store16Lane: {alignMax: 16 / 8, laneCeil: 128 / 16},
-	OpcodeVecV128Store8Lane:  {alignMax: 1, laneCeil: 128 / 8},
-}
-
-var vecLoadLanes = [...]struct {
-	alignMax uint32
-	laneCeil byte
-}{
-	OpcodeVecV128Load64Lane: {alignMax: 64 / 8, laneCeil: 128 / 64},
-	OpcodeVecV128Load32Lane: {alignMax: 32 / 8, laneCeil: 128 / 32},
-	OpcodeVecV128Load16Lane: {alignMax: 16 / 8, laneCeil: 128 / 16},
-	OpcodeVecV128Load8Lane:  {alignMax: 1, laneCeil: 128 / 8},
-}
-
-var vecSplatValueTypes = [...]ValueType{
-	OpcodeVecI8x16Splat: ValueTypeI32,
-	OpcodeVecI16x8Splat: ValueTypeI32,
-	OpcodeVecI32x4Splat: ValueTypeI32,
-	OpcodeVecI64x2Splat: ValueTypeI64,
-	OpcodeVecF32x4Splat: ValueTypeF32,
-	OpcodeVecF64x2Splat: ValueTypeF64,
-}
-
-type stacks struct {
-	vs valueTypeStack
-	cs controlBlockStack
-	// ls is the label slice that is reused for each br_table instruction.
-	ls []uint32
-}
-
-func (sts *stacks) reset(functionType *FunctionType) {
-	// Reset valueStack for reuse.
-	sts.vs.stack = sts.vs.stack[:0]
-	sts.vs.stackLimits = sts.vs.stackLimits[:0]
-	sts.vs.maximumStackPointer = 0
-	sts.cs.stack = sts.cs.stack[:0]
-	sts.cs.stack = append(sts.cs.stack, controlBlock{blockType: functionType})
-	sts.ls = sts.ls[:0]
-}
-
-type controlBlockStack struct {
-	stack []controlBlock
-}
-
-func (s *controlBlockStack) pop() *controlBlock {
-	tail := len(s.stack) - 1
-	ret := &s.stack[tail]
-	s.stack = s.stack[:tail]
-	return ret
-}
-
-func (s *controlBlockStack) push(startAt, elseAt, endAt uint64, blockType *FunctionType, blockTypeBytes uint64, op Opcode) {
-	s.stack = append(s.stack, controlBlock{
-		startAt:        startAt,
-		elseAt:         elseAt,
-		endAt:          endAt,
-		blockType:      blockType,
-		blockTypeBytes: blockTypeBytes,
-		op:             op,
-	})
-}
-
-type valueTypeStack struct {
-	stack               []ValueType
-	stackLimits         []int
-	maximumStackPointer int
-	// requireStackValuesTmp is used in requireStackValues function to reduce the allocation.
-	requireStackValuesTmp []ValueType
-}
-
-// Only used in the analyzeFunction below.
-const valueTypeUnknown = ValueType(0xFF)
-
-func (s *valueTypeStack) tryPop() (vt ValueType, limit int, ok bool) {
-	if len(s.stackLimits) > 0 {
-		limit = s.stackLimits[len(s.stackLimits)-1]
-	}
-	stackLen := len(s.stack)
-	if stackLen <= limit {
-		return
-	} else if stackLen == limit+1 && s.stack[limit] == valueTypeUnknown {
-		vt = valueTypeUnknown
-		ok = true
-		return
-	} else {
-		vt = s.stack[stackLen-1]
-		s.stack = s.stack[:stackLen-1]
-		ok = true
-		return
-	}
-}
-
-func (s *valueTypeStack) pop() (ValueType, error) {
-	if vt, limit, ok := s.tryPop(); ok {
-		return vt, nil
-	} else {
-		return 0, fmt.Errorf("invalid operation: trying to pop at %d with limit %d", len(s.stack), limit)
-	}
-}
-
-// popAndVerifyType returns an error if the stack value is unexpected.
-func (s *valueTypeStack) popAndVerifyType(expected ValueType) error {
-	have, _, ok := s.tryPop()
-	if !ok {
-		return fmt.Errorf("%s missing", ValueTypeName(expected))
-	}
-	if have != expected && have != valueTypeUnknown && expected != valueTypeUnknown {
-		return fmt.Errorf("type mismatch: expected %s, but was %s", ValueTypeName(expected), ValueTypeName(have))
-	}
-	return nil
-}
-
-func (s *valueTypeStack) push(v ValueType) {
-	s.stack = append(s.stack, v)
-	if sp := len(s.stack); sp > s.maximumStackPointer {
-		s.maximumStackPointer = sp
-	}
-}
-
-func (s *valueTypeStack) unreachable() {
-	s.resetAtStackLimit()
-	s.stack = append(s.stack, valueTypeUnknown)
-}
-
-func (s *valueTypeStack) resetAtStackLimit() {
-	if len(s.stackLimits) != 0 {
-		s.stack = s.stack[:s.stackLimits[len(s.stackLimits)-1]]
-	} else {
-		s.stack = s.stack[:0]
-	}
-}
-
-func (s *valueTypeStack) popStackLimit() {
-	if len(s.stackLimits) != 0 {
-		s.stackLimits = s.stackLimits[:len(s.stackLimits)-1]
-	}
-}
-
-// pushStackLimit pushes the control frame's bottom of the stack.
-func (s *valueTypeStack) pushStackLimit(params int) {
-	limit := len(s.stack) - params
-	s.stackLimits = append(s.stackLimits, limit)
-}
-
-func (s *valueTypeStack) popParams(oc Opcode, want []ValueType, checkAboveLimit bool) error {
-	return s.requireStackValues(true, InstructionName(oc), want, checkAboveLimit)
-}
-
-func (s *valueTypeStack) popResults(oc Opcode, want []ValueType, checkAboveLimit bool) error {
-	return s.requireStackValues(false, InstructionName(oc), want, checkAboveLimit)
-}
-
-func (s *valueTypeStack) requireStackValues(
-	isParam bool,
-	context string,
-	want []ValueType,
-	checkAboveLimit bool,
-) error {
-	limit := 0
-	if len(s.stackLimits) > 0 {
-		limit = s.stackLimits[len(s.stackLimits)-1]
-	}
-	// Iterate backwards as we are comparing the desired slice against stack value types.
-	countWanted := len(want)
-
-	// First, check if there are enough values on the stack.
-	s.requireStackValuesTmp = s.requireStackValuesTmp[:0]
-	for i := countWanted - 1; i >= 0; i-- {
-		popped, _, ok := s.tryPop()
-		if !ok {
-			if len(s.requireStackValuesTmp) > len(want) {
-				return typeCountError(isParam, context, s.requireStackValuesTmp, want)
-			}
-			return typeCountError(isParam, context, s.requireStackValuesTmp, want)
-		}
-		s.requireStackValuesTmp = append(s.requireStackValuesTmp, popped)
-	}
-
-	// Now, check if there are too many values.
-	if checkAboveLimit {
-		if !(limit == len(s.stack) || (limit+1 == len(s.stack) && s.stack[limit] == valueTypeUnknown)) {
-			return typeCountError(isParam, context, append(s.stack, want...), want)
-		}
-	}
-
-	// Finally, check the types of the values:
-	for i, v := range s.requireStackValuesTmp {
-		nextWant := want[countWanted-i-1] // have is in reverse order (stack)
-		if v != nextWant && v != valueTypeUnknown && nextWant != valueTypeUnknown {
-			return typeMismatchError(isParam, context, v, nextWant, i)
-		}
-	}
-	return nil
-}
-
-// typeMismatchError returns an error similar to go compiler's error on type mismatch.
-func typeMismatchError(isParam bool, context string, have ValueType, want ValueType, i int) error {
-	var ret strings.Builder
-	ret.WriteString("cannot use ")
-	ret.WriteString(ValueTypeName(have))
-	if context != "" {
-		ret.WriteString(" in ")
-		ret.WriteString(context)
-		ret.WriteString(" block")
-	}
-	if isParam {
-		ret.WriteString(" as param")
-	} else {
-		ret.WriteString(" as result")
-	}
-	ret.WriteString("[")
-	ret.WriteString(strconv.Itoa(i))
-	ret.WriteString("] type ")
-	ret.WriteString(ValueTypeName(want))
-	return errors.New(ret.String())
-}
-
-// typeCountError returns an error similar to go compiler's error on type count mismatch.
-func typeCountError(isParam bool, context string, have []ValueType, want []ValueType) error {
-	var ret strings.Builder
-	if len(have) > len(want) {
-		ret.WriteString("too many ")
-	} else {
-		ret.WriteString("not enough ")
-	}
-	if isParam {
-		ret.WriteString("params")
-	} else {
-		ret.WriteString("results")
-	}
-	if context != "" {
-		if isParam {
-			ret.WriteString(" for ")
-		} else {
-			ret.WriteString(" in ")
-		}
-		ret.WriteString(context)
-		ret.WriteString(" block")
-	}
-	ret.WriteString("\n\thave (")
-	writeValueTypes(have, &ret)
-	ret.WriteString(")\n\twant (")
-	writeValueTypes(want, &ret)
-	ret.WriteByte(')')
-	return errors.New(ret.String())
-}
-
-func writeValueTypes(vts []ValueType, ret *strings.Builder) {
-	switch len(vts) {
-	case 0:
-	case 1:
-		ret.WriteString(ValueTypeName(vts[0]))
-	default:
-		ret.WriteString(ValueTypeName(vts[0]))
-		for _, vt := range vts[1:] {
-			ret.WriteString(", ")
-			ret.WriteString(ValueTypeName(vt))
-		}
-	}
-}
-
-func (s *valueTypeStack) String() string {
-	var typeStrs, limits []string
-	for _, v := range s.stack {
-		var str string
-		if v == valueTypeUnknown {
-			str = "unknown"
-		} else {
-			str = ValueTypeName(v)
-		}
-		typeStrs = append(typeStrs, str)
-	}
-	for _, d := range s.stackLimits {
-		limits = append(limits, fmt.Sprintf("%d", d))
-	}
-	return fmt.Sprintf("{stack: [%s], limits: [%s]}",
-		strings.Join(typeStrs, ", "), strings.Join(limits, ","))
-}
-
-type controlBlock struct {
-	startAt, elseAt, endAt uint64
-	blockType              *FunctionType
-	blockTypeBytes         uint64
-	// op is zero when the outermost block
-	op Opcode
-}
-
-// DecodeBlockType decodes the type index from a positive 33-bit signed integer. Negative numbers indicate up to one
-// WebAssembly 1.0 (20191205) compatible result type. Positive numbers are decoded when `enabledFeatures` include
-// CoreFeatureMultiValue and include an index in the Module.TypeSection.
-//
-// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#binary-blocktype
-// See https://github.com/WebAssembly/spec/blob/wg-2.0.draft1/proposals/multi-value/Overview.md
-func DecodeBlockType(types []FunctionType, r *bytes.Reader, enabledFeatures api.CoreFeatures) (*FunctionType, uint64, error) {
-	raw, num, err := leb128.DecodeInt33AsInt64(r)
-	if err != nil {
-		return nil, 0, fmt.Errorf("decode int33: %w", err)
-	}
-
-	var ret *FunctionType
-	switch raw {
-	case -64: // 0x40 in original byte = nil
-		ret = blockType_v_v
-	case -1: // 0x7f in original byte = i32
-		ret = blockType_v_i32
-	case -2: // 0x7e in original byte = i64
-		ret = blockType_v_i64
-	case -3: // 0x7d in original byte = f32
-		ret = blockType_v_f32
-	case -4: // 0x7c in original byte = f64
-		ret = blockType_v_f64
-	case -5: // 0x7b in original byte = v128
-		ret = blockType_v_v128
-	case -16: // 0x70 in original byte = funcref
-		ret = blockType_v_funcref
-	case -17: // 0x6f in original byte = externref
-		ret = blockType_v_externref
-	default:
-		if err = enabledFeatures.RequireEnabled(api.CoreFeatureMultiValue); err != nil {
-			return nil, num, fmt.Errorf("block with function type return invalid as %v", err)
-		}
-		if raw < 0 || (raw >= int64(len(types))) {
-			return nil, 0, fmt.Errorf("type index out of range: %d", raw)
-		}
-		ret = &types[raw]
-	}
-	return ret, num, err
-}
-
-// These block types are defined as globals in order to avoid allocations in DecodeBlockType.
-var (
-	blockType_v_v         = &FunctionType{}
-	blockType_v_i32       = &FunctionType{Results: []ValueType{ValueTypeI32}, ResultNumInUint64: 1}
-	blockType_v_i64       = &FunctionType{Results: []ValueType{ValueTypeI64}, ResultNumInUint64: 1}
-	blockType_v_f32       = &FunctionType{Results: []ValueType{ValueTypeF32}, ResultNumInUint64: 1}
-	blockType_v_f64       = &FunctionType{Results: []ValueType{ValueTypeF64}, ResultNumInUint64: 1}
-	blockType_v_v128      = &FunctionType{Results: []ValueType{ValueTypeV128}, ResultNumInUint64: 2}
-	blockType_v_funcref   = &FunctionType{Results: []ValueType{ValueTypeFuncref}, ResultNumInUint64: 1}
-	blockType_v_externref = &FunctionType{Results: []ValueType{ValueTypeExternref}, ResultNumInUint64: 1}
-)
-
-// SplitCallStack returns the input stack resliced to the count of params and
-// results, or errors if it isn't long enough for either.
-func SplitCallStack(ft *FunctionType, stack []uint64) (params []uint64, results []uint64, err error) {
-	stackLen := len(stack)
-	if n := ft.ParamNumInUint64; n > stackLen {
-		return nil, nil, fmt.Errorf("need %d params, but stack size is %d", n, stackLen)
-	} else if n > 0 {
-		params = stack[:n]
-	}
-	if n := ft.ResultNumInUint64; n > stackLen {
-		return nil, nil, fmt.Errorf("need %d results, but stack size is %d", n, stackLen)
-	} else if n > 0 {
-		results = stack[:n]
-	}
-	return
-}