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vm.go
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vm.go
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package exec
import (
"encoding/binary"
"fmt"
"math"
"math/bits"
"runtime/debug"
"github.com/perlin-network/life/compiler"
"github.com/perlin-network/life/compiler/opcodes"
"github.com/perlin-network/life/utils"
"strings"
"github.com/go-interpreter/wagon/wasm"
)
type FunctionImport func(vm *VirtualMachine) int64
const (
// DefaultCallStackSize is the default call stack size.
DefaultCallStackSize = 512
// DefaultPageSize is the linear memory page size.
DefaultPageSize = 65536
// JITCodeSizeThreshold is the lower-bound code size threshold for the JIT compiler.
JITCodeSizeThreshold = 30
)
// LE is a simple alias to `binary.LittleEndian`.
var LE = binary.LittleEndian
type FunctionImportInfo struct {
ModuleName string
FieldName string
F FunctionImport
}
type NCompileConfig struct {
AliasDef bool
DisableMemBoundCheck bool
}
type AOTService interface {
UnsafeInvokeFunction_0(vm *VirtualMachine, name string) uint64
UnsafeInvokeFunction_1(vm *VirtualMachine, name string, p0 uint64) uint64
UnsafeInvokeFunction_2(vm *VirtualMachine, name string, p0, p1 uint64) uint64
}
// VirtualMachine is a WebAssembly execution environment.
type VirtualMachine struct {
Config VMConfig
Module *compiler.Module
FunctionCode []compiler.InterpreterCode
FunctionImports []FunctionImportInfo
CallStack []Frame
CurrentFrame int
Table []uint32
Globals []int64
Memory []byte
NumValueSlots int
Yielded int64
InsideExecute bool
Delegate func()
Exited bool
ExitError interface{}
ReturnValue int64
Gas uint64
GasLimitExceeded bool
GasPolicy compiler.GasPolicy
ImportResolver ImportResolver
AOTService AOTService
StackTrace string
}
// VMConfig denotes a set of options passed to a single VirtualMachine insta.ce
type VMConfig struct {
EnableJIT bool
MaxMemoryPages int
MaxTableSize int
MaxValueSlots int
MaxCallStackDepth int
DefaultMemoryPages int
DefaultTableSize int
GasLimit uint64
DisableFloatingPoint bool
ReturnOnGasLimitExceeded bool
}
// Frame represents a call frame.
type Frame struct {
FunctionID int
Code []byte
Regs []int64
Locals []int64
IP int
ReturnReg int
Continuation int32
}
// ImportResolver is an interface for allowing one to define imports to WebAssembly modules
// ran under a single VirtualMachine instance.
type ImportResolver interface {
ResolveFunc(module, field string) FunctionImport
ResolveGlobal(module, field string) int64
}
// NewVirtualMachine instantiates a virtual machine for a given WebAssembly module, with
// specific execution options specified under a VMConfig, and a WebAssembly module import
// resolver.
func NewVirtualMachine(
code []byte,
config VMConfig,
impResolver ImportResolver,
gasPolicy compiler.GasPolicy,
) (_retVM *VirtualMachine, retErr error) {
if config.EnableJIT {
fmt.Println("Warning: JIT support is removed.")
}
m, err := compiler.LoadModule(code)
if err != nil {
return nil, err
}
m.DisableFloatingPoint = config.DisableFloatingPoint
functionCode, err := m.CompileForInterpreter(gasPolicy)
if err != nil {
return nil, err
}
defer utils.CatchPanic(&retErr)
table := make([]uint32, 0)
globals := make([]int64, 0)
funcImports := make([]FunctionImportInfo, 0)
if m.Base.Import != nil && impResolver != nil {
for _, imp := range m.Base.Import.Entries {
switch imp.Type.Kind() {
case wasm.ExternalFunction:
funcImports = append(funcImports, FunctionImportInfo{
ModuleName: imp.ModuleName,
FieldName: imp.FieldName,
F: nil, // deferred
})
case wasm.ExternalGlobal:
globals = append(globals, impResolver.ResolveGlobal(imp.ModuleName, imp.FieldName))
case wasm.ExternalMemory:
// TODO: Do we want a real import?
if m.Base.Memory != nil && len(m.Base.Memory.Entries) > 0 {
panic("cannot import another memory while we already have one")
}
m.Base.Memory = &wasm.SectionMemories{
Entries: []wasm.Memory{
wasm.Memory{
Limits: wasm.ResizableLimits{
Initial: uint32(config.DefaultMemoryPages),
},
},
},
}
case wasm.ExternalTable:
// TODO: Do we want a real import?
if m.Base.Table != nil && len(m.Base.Table.Entries) > 0 {
panic("cannot import another table while we already have one")
}
m.Base.Table = &wasm.SectionTables{
Entries: []wasm.Table{
wasm.Table{
Limits: wasm.ResizableLimits{
Initial: uint32(config.DefaultTableSize),
},
},
},
}
default:
panic(fmt.Errorf("import kind not supported: %d", imp.Type.Kind()))
}
}
}
// Load global entries.
for _, entry := range m.Base.GlobalIndexSpace {
globals = append(globals, execInitExpr(entry.Init, globals))
}
// Populate table elements.
if m.Base.Table != nil && len(m.Base.Table.Entries) > 0 {
t := &m.Base.Table.Entries[0]
if config.MaxTableSize != 0 && int(t.Limits.Initial) > config.MaxTableSize {
panic("max table size exceeded")
}
table = make([]uint32, int(t.Limits.Initial))
for i := 0; i < int(t.Limits.Initial); i++ {
table[i] = 0xffffffff
}
if m.Base.Elements != nil && len(m.Base.Elements.Entries) > 0 {
for _, e := range m.Base.Elements.Entries {
offset := int(execInitExpr(e.Offset, globals))
copy(table[offset:], e.Elems)
}
}
}
// Load linear memory.
memory := make([]byte, 0)
if m.Base.Memory != nil && len(m.Base.Memory.Entries) > 0 {
initialLimit := int(m.Base.Memory.Entries[0].Limits.Initial)
if config.MaxMemoryPages != 0 && initialLimit > config.MaxMemoryPages {
panic("max memory exceeded")
}
capacity := initialLimit * DefaultPageSize
// Initialize empty memory.
memory = make([]byte, capacity)
for i := 0; i < capacity; i++ {
memory[i] = 0
}
if m.Base.Data != nil && len(m.Base.Data.Entries) > 0 {
for _, e := range m.Base.Data.Entries {
offset := int(execInitExpr(e.Offset, globals))
copy(memory[int(offset):], e.Data)
}
}
}
return &VirtualMachine{
Module: m,
Config: config,
FunctionCode: functionCode,
FunctionImports: funcImports,
CallStack: make([]Frame, DefaultCallStackSize),
CurrentFrame: -1,
Table: table,
Globals: globals,
Memory: memory,
Exited: true,
GasPolicy: gasPolicy,
ImportResolver: impResolver,
}, nil
}
func (vm *VirtualMachine) SetAOTService(s AOTService) {
vm.AOTService = s
}
func bSprintf(builder *strings.Builder, format string, args ...interface{}) {
builder.WriteString(fmt.Sprintf(format, args...))
}
func escapeName(name string) string {
ret := ""
for _, ch := range []byte(name) {
if (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9') || ch == '_' {
ret += string(ch)
} else {
ret += fmt.Sprintf("\\x%02x", ch)
}
}
return ret
}
func filterName(name string) string {
ret := ""
for _, ch := range []byte(name) {
if (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9') || ch == '_' {
ret += string(ch)
}
}
return ret
}
func (vm *VirtualMachine) GenerateNEnv(config NCompileConfig) string {
builder := &strings.Builder{}
bSprintf(builder, "#include <stdint.h>\n\n")
if config.DisableMemBoundCheck {
builder.WriteString("#define POLYMERASE_NO_MEM_BOUND_CHECK\n")
}
builder.WriteString(compiler.NGEN_HEADER)
if !vm.Config.DisableFloatingPoint {
builder.WriteString(compiler.NGEN_FP_HEADER)
}
bSprintf(builder, "static uint64_t globals[] = {")
for _, v := range vm.Globals {
bSprintf(builder, "%dull,", uint64(v))
}
bSprintf(builder, "};\n")
for i, code := range vm.FunctionCode {
bSprintf(builder, "uint64_t %s%d(struct VirtualMachine *", compiler.NGEN_FUNCTION_PREFIX, i)
for j := 0; j < code.NumParams; j++ {
bSprintf(builder, ",uint64_t")
}
bSprintf(builder, ");\n")
}
// call_indirect dispatcher.
bSprintf(builder, "struct TableEntry { uint64_t num_params; void *func; };\n")
bSprintf(builder, "static const uint64_t num_table_entries = %d;\n", len(vm.Table))
bSprintf(builder, "static struct TableEntry table[] = {\n")
for _, entry := range vm.Table {
if entry == math.MaxUint32 {
bSprintf(builder, "{ .num_params = 0, .func = 0 },\n")
} else {
functionID := int(entry)
code := vm.FunctionCode[functionID]
bSprintf(builder, "{ .num_params = %d, .func = %s%d },\n", code.NumParams, compiler.NGEN_FUNCTION_PREFIX, functionID)
}
}
bSprintf(builder, "};\n")
bSprintf(builder, "static void * __attribute__((always_inline)) %sresolve_indirect(struct VirtualMachine *vm, uint64_t entry_id, uint64_t num_params) {\n", compiler.NGEN_ENV_API_PREFIX)
bSprintf(builder, "if(entry_id >= num_table_entries) { vm->throw_s(vm, \"%s\"); }\n", "table entry out of bounds")
bSprintf(builder, "if(table[entry_id].func == 0) { vm->throw_s(vm, \"%s\"); }\n", "table entry is null")
bSprintf(builder, "if(table[entry_id].num_params != num_params) { vm->throw_s(vm, \"%s\"); }\n", "argument count mismatch")
bSprintf(builder, "return table[entry_id].func;\n")
bSprintf(builder, "}\n")
bSprintf(builder, "struct ImportEntry { const char *module_name; const char *field_name; ExternalFunction f; };\n")
bSprintf(builder, "static const uint64_t num_import_entries = %d;\n", len(vm.FunctionImports))
bSprintf(builder, "static struct ImportEntry imports[] = {\n")
for _, imp := range vm.FunctionImports {
bSprintf(builder, "{ .module_name = \"%s\", .field_name = \"%s\", .f = 0 },\n", escapeName(imp.ModuleName), escapeName(imp.FieldName))
}
bSprintf(builder, "};\n")
bSprintf(builder,
"static uint64_t __attribute__((always_inline)) %sinvoke_import(struct VirtualMachine *vm, uint64_t import_id, uint64_t num_params, uint64_t *params) {\n",
compiler.NGEN_ENV_API_PREFIX,
)
bSprintf(builder, "if(import_id >= num_import_entries) { vm->throw_s(vm, \"%s\"); }\n", "import entry out of bounds")
bSprintf(builder, "if(imports[import_id].f == 0) { imports[import_id].f = vm->resolve_import(vm, imports[import_id].module_name, imports[import_id].field_name); }\n")
bSprintf(builder, "if(imports[import_id].f == 0) { vm->throw_s(vm, \"%s\"); }\n", "cannot resolve import")
bSprintf(builder, "return imports[import_id].f(vm, import_id, num_params, params);\n")
bSprintf(builder, "}\n")
return builder.String()
}
func (vm *VirtualMachine) NBuildAliasDef() string {
builder := &strings.Builder{}
builder.WriteString("// Aliases for exported functions\n")
if vm.Module.Base.Export != nil {
for name, exp := range vm.Module.Base.Export.Entries {
if exp.Kind == wasm.ExternalFunction {
bSprintf(builder, "#define %sexport_%s %s%d\n", compiler.NGEN_FUNCTION_PREFIX, filterName(name), compiler.NGEN_FUNCTION_PREFIX, exp.Index)
}
}
}
return builder.String()
}
func (vm *VirtualMachine) NCompile(config NCompileConfig) string {
body, err := vm.Module.CompileWithNGen(vm.GasPolicy, uint64(len(vm.Globals)))
if err != nil {
panic(err)
}
out := vm.GenerateNEnv(config) + "\n" + body
if config.AliasDef {
out += "\n"
out += vm.NBuildAliasDef()
}
return out
}
// Init initializes a frame. Must be called on `call` and `call_indirect`.
func (f *Frame) Init(vm *VirtualMachine, functionID int, code compiler.InterpreterCode) {
numValueSlots := code.NumRegs + code.NumParams + code.NumLocals
if vm.Config.MaxValueSlots != 0 && vm.NumValueSlots+numValueSlots > vm.Config.MaxValueSlots {
panic("max value slot count exceeded")
}
vm.NumValueSlots += numValueSlots
values := make([]int64, numValueSlots)
f.FunctionID = functionID
f.Regs = values[:code.NumRegs]
f.Locals = values[code.NumRegs:]
f.Code = code.Bytes
f.IP = 0
f.Continuation = 0
//fmt.Printf("Enter function %d (%s)\n", functionID, vm.Module.FunctionNames[functionID])
}
// Destroy destroys a frame. Must be called on return.
func (f *Frame) Destroy(vm *VirtualMachine) {
numValueSlots := len(f.Regs) + len(f.Locals)
vm.NumValueSlots -= numValueSlots
//fmt.Printf("Leave function %d (%s)\n", f.FunctionID, vm.Module.FunctionNames[f.FunctionID])
}
// GetCurrentFrame returns the current frame.
func (vm *VirtualMachine) GetCurrentFrame() *Frame {
if vm.Config.MaxCallStackDepth != 0 && vm.CurrentFrame >= vm.Config.MaxCallStackDepth {
panic("max call stack depth exceeded")
}
if vm.CurrentFrame >= len(vm.CallStack) {
panic("call stack overflow")
//vm.CallStack = append(vm.CallStack, make([]Frame, DefaultCallStackSize / 2)...)
}
return &vm.CallStack[vm.CurrentFrame]
}
func (vm *VirtualMachine) getExport(key string, kind wasm.External) (int, bool) {
if vm.Module.Base.Export == nil {
return -1, false
}
entry, ok := vm.Module.Base.Export.Entries[key]
if !ok {
return -1, false
}
if entry.Kind != kind {
return -1, false
}
return int(entry.Index), true
}
// GetGlobalExport returns the global export with the given name.
func (vm *VirtualMachine) GetGlobalExport(key string) (int, bool) {
return vm.getExport(key, wasm.ExternalGlobal)
}
// GetFunctionExport returns the function export with the given name.
func (vm *VirtualMachine) GetFunctionExport(key string) (int, bool) {
return vm.getExport(key, wasm.ExternalFunction)
}
// PrintStackTrace prints the entire VM stack trace for debugging.
func (vm *VirtualMachine) PrintStackTrace() {
fmt.Println("--- Begin stack trace ---")
for i := vm.CurrentFrame; i >= 0; i-- {
functionID := vm.CallStack[i].FunctionID
fmt.Printf("<%d> [%d] %s\n", i, functionID, vm.Module.FunctionNames[functionID])
}
fmt.Println("--- End stack trace ---")
}
// Ignite initializes the first call frame.
func (vm *VirtualMachine) Ignite(functionID int, params ...int64) {
if vm.ExitError != nil {
panic("last execution exited with error; cannot ignite.")
}
if vm.CurrentFrame != -1 {
panic("call stack not empty; cannot ignite.")
}
code := vm.FunctionCode[functionID]
if code.NumParams != len(params) {
panic("param count mismatch")
}
vm.Exited = false
vm.CurrentFrame++
frame := vm.GetCurrentFrame()
frame.Init(
vm,
functionID,
code,
)
copy(frame.Locals, params)
}
func (vm *VirtualMachine) AddAndCheckGas(delta uint64) bool {
newGas := vm.Gas + delta
if newGas < vm.Gas {
panic("gas overflow")
}
if vm.Config.GasLimit != 0 && newGas > vm.Config.GasLimit {
if vm.Config.ReturnOnGasLimitExceeded {
return false
} else {
panic("gas limit exceeded")
}
}
vm.Gas = newGas
return true
}
// Execute starts the virtual machines main instruction processing loop.
// This function may return at any point and is guaranteed to return
// at least once every 10000 instructions. Caller is responsible for
// detecting VM status in a loop.
func (vm *VirtualMachine) Execute() {
if vm.Exited == true {
panic("attempting to execute an exited vm")
}
if vm.Delegate != nil {
panic("delegate not cleared")
}
if vm.InsideExecute {
panic("vm execution is not re-entrant")
}
vm.InsideExecute = true
vm.GasLimitExceeded = false
defer func() {
vm.InsideExecute = false
if err := recover(); err != nil {
vm.Exited = true
vm.ExitError = err
vm.StackTrace = string(debug.Stack())
}
}()
frame := vm.GetCurrentFrame()
for {
valueID := int(LE.Uint32(frame.Code[frame.IP : frame.IP+4]))
ins := opcodes.Opcode(frame.Code[frame.IP+4])
frame.IP += 5
//fmt.Printf("INS: [%d] %s\n", valueID, ins.String())
switch ins {
case opcodes.Nop:
case opcodes.Unreachable:
panic("wasm: unreachable executed")
case opcodes.Select:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
c := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+8:frame.IP+12]))])
frame.IP += 12
if c != 0 {
frame.Regs[valueID] = a
} else {
frame.Regs[valueID] = b
}
case opcodes.I32Const:
val := LE.Uint32(frame.Code[frame.IP : frame.IP+4])
frame.IP += 4
frame.Regs[valueID] = int64(val)
case opcodes.I32Add:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a + b)
case opcodes.I32Sub:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a - b)
case opcodes.I32Mul:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a * b)
case opcodes.I32DivS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
if a == math.MinInt32 && b == -1 {
panic("signed integer overflow")
}
frame.IP += 8
frame.Regs[valueID] = int64(a / b)
case opcodes.I32DivU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = int64(a / b)
case opcodes.I32RemS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = int64(a % b)
case opcodes.I32RemU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = int64(a % b)
case opcodes.I32And:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a & b)
case opcodes.I32Or:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a | b)
case opcodes.I32Xor:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a ^ b)
case opcodes.I32Shl:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a << (b % 32))
case opcodes.I32ShrS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a >> (b % 32))
case opcodes.I32ShrU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a >> (b % 32))
case opcodes.I32Rotl:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(bits.RotateLeft32(a, int(b)))
case opcodes.I32Rotr:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(bits.RotateLeft32(a, -int(b)))
case opcodes.I32Clz:
val := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.LeadingZeros32(val))
case opcodes.I32Ctz:
val := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.TrailingZeros32(val))
case opcodes.I32PopCnt:
val := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.OnesCount32(val))
case opcodes.I32EqZ:
val := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
if val == 0 {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32Eq:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a == b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32Ne:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a != b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32LtS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a < b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32LtU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a < b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32LeS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a <= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32LeU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a <= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32GtS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a > b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32GtU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a > b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32GeS:
a := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := int32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a >= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I32GeU:
a := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint32(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a >= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64Const:
val := LE.Uint64(frame.Code[frame.IP : frame.IP+8])
frame.IP += 8
frame.Regs[valueID] = int64(val)
case opcodes.I64Add:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a + b
case opcodes.I64Sub:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a - b
case opcodes.I64Mul:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a * b
case opcodes.I64DivS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
if b == 0 {
panic("integer division by zero")
}
if a == math.MinInt64 && b == -1 {
panic("signed integer overflow")
}
frame.IP += 8
frame.Regs[valueID] = a / b
case opcodes.I64DivU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = int64(a / b)
case opcodes.I64RemS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = a % b
case opcodes.I64RemU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
if b == 0 {
panic("integer division by zero")
}
frame.IP += 8
frame.Regs[valueID] = int64(a % b)
case opcodes.I64And:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a & b
case opcodes.I64Or:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a | b
case opcodes.I64Xor:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
frame.Regs[valueID] = a ^ b
case opcodes.I64Shl:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = a << (b % 64)
case opcodes.I64ShrS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = a >> (b % 64)
case opcodes.I64ShrU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(a >> (b % 64))
case opcodes.I64Rotl:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(bits.RotateLeft64(a, int(b)))
case opcodes.I64Rotr:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
frame.Regs[valueID] = int64(bits.RotateLeft64(a, -int(b)))
case opcodes.I64Clz:
val := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.LeadingZeros64(val))
case opcodes.I64Ctz:
val := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.TrailingZeros64(val))
case opcodes.I64PopCnt:
val := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
frame.Regs[valueID] = int64(bits.OnesCount64(val))
case opcodes.I64EqZ:
val := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
frame.IP += 4
if val == 0 {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64Eq:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a == b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64Ne:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a != b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64LtS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a < b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64LtU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a < b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64LeS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a <= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64LeU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a <= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64GtS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a > b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64GtU:
a := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))])
b := uint64(frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))])
frame.IP += 8
if a > b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64GeS:
a := frame.Regs[int(LE.Uint32(frame.Code[frame.IP:frame.IP+4]))]
b := frame.Regs[int(LE.Uint32(frame.Code[frame.IP+4:frame.IP+8]))]
frame.IP += 8
if a >= b {
frame.Regs[valueID] = 1
} else {
frame.Regs[valueID] = 0
}
case opcodes.I64GeU: