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instance.cpp
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#include "instance.hpp"
#include "module.hpp"
#include "spec.hpp"
#include <algorithm>
#include <cassert>
#include <cmath>
#include <functional>
#include <limits>
#ifdef WASM_DEBUG
#include <iostream>
#endif
namespace mitey {
Instance::Instance(std::shared_ptr<Module> module)
: module(module), memory(nullptr), initial_stack(nullptr, 0),
initial_control_stack(nullptr, 0), if_jumps(module->if_jumps),
block_ends(module->block_ends) {
uint32_t buffer_size = 0;
std::function<void(uint8_t *)> cb = [](uint8_t *) {};
auto alloc =
[&]<template <typename T, size_t...> class Container, typename T>(
Container<T> *member, uint32_t size) {
uint32_t offset = buffer_size;
buffer_size += sizeof(T) * size;
buffer_size += -buffer_size & 15;
auto prev_cb = cb;
cb = [=](uint8_t *raw_buffer) {
new (member) Container<T>((T *)(raw_buffer + offset), size);
prev_cb(raw_buffer);
};
};
alloc(&initial_stack, STACK_SIZE / sizeof(WasmValue));
alloc(&initial_control_stack, MAX_DEPTH);
alloc(&functions, module->functions.size());
alloc(&types, module->types.size());
alloc(&globals, module->globals.size());
alloc(&elements, module->elements.size());
alloc(&data_segments, module->data_segments.size());
alloc(&tables, module->tables.size());
// align to 2mb (in hopes of getting a huge page)
constexpr auto TWO_MB = 1ULL << 21;
buffer_size += -buffer_size & (TWO_MB - 1);
buffer = std::make_unique<uint8_t[]>(buffer_size);
cb(buffer.get());
}
void Instance::initialize(const Imports &imports) {
auto get_import = [&](const ImportSpecifier &specifier) -> ExportValue {
auto [module_name, field_name] = specifier;
if (!imports.contains(module_name)) {
auto msg = "unknown import " + module_name;
error<link_error>(msg);
}
auto &import_module = imports.at(module_name);
if (!import_module.contains(field_name)) {
auto msg = "unknown import " + module_name + "." + field_name;
error<link_error>(msg);
}
auto &import = import_module.at(field_name);
if (static_cast<mitey::ImExDesc>(import.index()) !=
module->imports.at(module_name).at(field_name)) {
error<link_error>("incompatible import type");
}
return import;
};
if (module->memory.exists) {
if (module->memory.import) {
auto imported_memory = std::get<std::shared_ptr<WasmMemory>>(
get_import(*module->memory.import));
if (imported_memory->size() < module->memory.min ||
imported_memory->max() > module->memory.max) {
error<link_error>("incompatible import type");
}
memory = imported_memory;
} else {
memory = std::make_shared<WasmMemory>(module->memory.min,
module->memory.max);
}
}
for (uint32_t i = 0; i < functions.size(); i++) {
const auto &fn = module->functions[i];
if (fn.import) {
auto imported_function =
std::get<FunctionInfo>(get_import(*fn.import));
if (imported_function.type !=
RuntimeType::from_signature(fn.type)) {
error<link_error>("incompatible import type");
}
functions[i] = imported_function;
} else {
functions[i] =
FunctionInfo(fn.type, self.lock(), fn.start, fn.locals);
}
}
for (uint32_t i = 0; i < types.size(); i++) {
types[i] = RuntimeType::from_signature(module->types[i]);
}
for (uint32_t i = 0; i < globals.size(); i++) {
const auto &global = module->globals[i];
if (global.import) {
auto imported_global = std::get<std::shared_ptr<WasmGlobal>>(
get_import(*global.import));
if (imported_global->type != global.type ||
imported_global->_mut != global.mutability) {
error<link_error>("incompatible import type");
}
globals[i] = imported_global;
} else {
globals[i] = std::make_shared<WasmGlobal>(
global.type, global.mutability,
interpret_const_inplace(global.initializer));
}
}
for (uint32_t i = 0; i < tables.size(); i++) {
const auto &table = module->tables[i];
if (table.import) {
auto imported_table =
std::get<std::shared_ptr<WasmTable>>(get_import(*table.import));
if (imported_table->size() < table.min ||
imported_table->max() > table.max ||
imported_table->type != table.type) {
error<link_error>("incompatible import type");
}
tables[i] = imported_table;
} else {
tables[i] =
std::make_shared<WasmTable>(table.type, table.min, table.max);
}
}
uint8_t *iter = module->element_start;
for (uint32_t i = 0; i < elements.size(); i++) {
uint32_t flags = read_leb128(iter);
if (flags & 1) {
if (flags & 0b10) {
if (flags & 0b100) {
// flags = 7
// characteristics: declarative, elem type + exprs
valtype reftype = static_cast<valtype>(*iter++);
uint32_t n_elements = read_leb128(iter);
for (uint32_t j = 0; j < n_elements; j++) {
interpret_const(iter);
}
elements[i] = ElementSegment{reftype, {}};
} else {
// flags = 3
// characteristics: declarative, elem kind + indices
/* uint8_t elemkind = * */ iter++;
uint32_t n_elements = read_leb128(iter);
for (uint32_t j = 0; j < n_elements; j++) {
read_leb128(iter);
}
elements[i] = ElementSegment{valtype::funcref, {}};
}
} else {
if (flags & 0b100) {
// flags = 5
// characteristics: passive, elem type + exprs
valtype reftype = static_cast<valtype>(*iter++);
uint32_t n_elements = read_leb128(iter);
std::vector<WasmValue> elem(n_elements);
for (uint32_t j = 0; j < n_elements; j++) {
elem[j] = interpret_const(iter);
}
elements[i] = ElementSegment{reftype, elem};
} else {
// flags = 1
// characteristics: passive, elem kind + indices
/* uint8_t elemkind = * */ iter++;
uint32_t n_elements = read_leb128(iter);
std::vector<WasmValue> elem(n_elements);
for (uint32_t j = 0; j < n_elements; j++) {
elem[j] = &functions[read_leb128(iter)];
}
elements[i] = ElementSegment{valtype::funcref, elem};
}
}
} else {
valtype reftype;
auto table = tables[flags & 0b10 ? read_leb128(iter) : 0];
uint32_t offset = interpret_const(iter).u32;
uint16_t reftype_or_elemkind = flags & 0b10 ? *iter++ : 256;
uint32_t n_elements = read_leb128(iter);
if (offset + n_elements > table->size()) {
error<uninstantiable_error>("out of bounds table access");
}
std::vector<WasmValue> elem(n_elements);
if (flags & 0b100) {
// flags = 4 or 6
// characteristics: active, elem type + exprs
if (reftype_or_elemkind == 256)
reftype_or_elemkind =
static_cast<uint16_t>(valtype::funcref);
reftype = static_cast<valtype>(reftype_or_elemkind);
for (uint32_t j = 0; j < n_elements; j++) {
WasmValue ref = interpret_const(iter);
elem[j] = ref;
if (offset + j >= table->size()) {
error<uninstantiable_error>(
"out of bounds table access");
}
table->set(offset + j, ref);
}
} else {
if (reftype_or_elemkind == 256)
reftype_or_elemkind = 0;
reftype = valtype::funcref;
// flags = 0 or 2
// characteristics: active, elem kind + indices
for (uint32_t j = 0; j < n_elements; j++) {
uint32_t elem_idx = read_leb128(iter);
WasmValue funcref = &functions[elem_idx];
elem[j] = funcref;
if (offset + j >= table->size()) {
error<uninstantiable_error>(
"out of bounds table access");
}
table->set(offset + j, funcref);
}
}
elements[i] = ElementSegment{reftype, {}};
}
}
for (uint32_t i = 0; i < data_segments.size(); i++) {
const auto &data = module->data_segments[i];
if (data.initializer) {
uint32_t offset = interpret_const_inplace(data.initializer).u32;
try {
memory->copy_into(offset, 0, data, data.data.size());
} catch (const trap_error &e) {
error<uninstantiable_error>(e.what());
}
data_segments[i] = {};
} else {
data_segments[i] = data;
}
}
for (const auto &[name, export_] : module->exports) {
switch (export_.desc) {
case ImExDesc::func:
exports[name] = externalize_function(functions[export_.idx]);
break;
case ImExDesc::table:
exports[name] = tables[export_.idx];
break;
case ImExDesc::mem:
exports[name] = memory;
break;
case ImExDesc::global:
exports[name] = globals[export_.idx];
break;
}
}
if (module->start != std::numeric_limits<uint32_t>::max()) {
const auto &fn = functions[module->start];
if (fn.type.n_params || fn.type.n_results) {
error<validation_error>("start function");
}
try {
entrypoint(fn, initial_stack, initial_control_stack);
} catch (const trap_error &e) {
error<uninstantiable_error>(e.what());
}
}
}
WasmValue Instance::interpret_const(uint8_t *&iter) {
std::vector<WasmValue> stack;
#define OP(ty, op) \
{ \
auto arg1 = stack.back(); \
stack.pop_back(); \
auto arg2 = stack.back(); \
stack.pop_back(); \
stack.push_back(arg1.ty op arg2.ty); \
break; \
}
#define I32_OP(op) OP(i32, op)
#define I64_OP(op) OP(i64, op)
while (1) {
uint8_t byte = *iter++;
#ifdef WASM_DEBUG
std::cerr << "reading instruction " << instructions[byte] << " at "
<< iter - module->bytes.get() << std::endl;
#endif
using enum Instruction;
if (static_cast<Instruction>(byte) == end) {
break;
}
switch (static_cast<Instruction>(byte)) {
case i32const:
stack.push_back((int32_t)read_sleb128(iter));
break;
case i64const:
stack.push_back((int64_t)read_sleb128(iter));
break;
case f32const: {
float x;
std::memcpy(&x, iter, sizeof(float));
stack.push_back(x);
iter += sizeof(float);
break;
}
case f64const: {
double x;
std::memcpy(&x, iter, sizeof(double));
stack.push_back(x);
iter += sizeof(double);
break;
}
case globalget:
stack.push_back(globals[read_leb128(iter)]->value);
break;
case i32add:
I32_OP(+);
case i32sub:
I32_OP(-);
case i32mul:
I32_OP(*);
case i64add:
I64_OP(+);
case i64sub:
I64_OP(-);
case i64mul:
I64_OP(*);
case ref_null: {
read_leb128(iter);
stack.push_back((void *)nullptr);
break;
}
case ref_func: {
uint32_t func_idx = safe_read_leb128<uint32_t>(iter);
stack.push_back(&functions[func_idx]);
break;
}
default:
__builtin_unreachable();
}
}
return stack.back();
#undef OP
#undef I32_OP
#undef I64_OP
} // namespace mitey
FunctionInfo Instance::externalize_function(const FunctionInfo &fn) {
if (fn.static_fn || fn.dyn_fn) {
// already external
return fn;
} else {
return FunctionInfo(fn.type, [&](WasmValue *extern_stack) {
const auto &type = fn.type;
for (uint32_t i = 0; i < type.n_params; i++) {
initial_stack.push(extern_stack[i]);
}
try {
entrypoint(fn, initial_stack, initial_control_stack);
} catch (const trap_error &e) {
initial_stack.clear();
initial_control_stack.clear();
throw;
}
initial_stack -= type.n_results;
for (uint32_t i = 0; i < type.n_results; i++) {
extern_stack[i] = initial_stack[i];
}
});
}
}
void Instance::entrypoint(const FunctionInfo &fn, tape<WasmValue> &stack,
tape<BrTarget> &control_stack) {
auto prev_start = control_stack.get_start();
control_stack.set_start(control_stack.unsafe_ptr());
try {
call_function_info(fn, nullptr, stack, control_stack);
control_stack.set_start(prev_start);
} catch (const trap_error &) {
control_stack.set_start(prev_start);
throw;
}
}
inline void Instance::call_function_info(const FunctionInfo &fn,
uint8_t *return_to,
tape<WasmValue> &stack,
tape<BrTarget> &control_stack) {
if (fn.wasm_fn) {
// parameters are the first locals and they're taken from the top of
// the stack
stack -= fn.type.n_params;
WasmValue *locals_start = stack.unsafe_ptr();
stack += fn.type.n_params + fn.wasm_fn.n_locals;
WasmValue *locals_end = stack.unsafe_ptr();
WasmValue *nonparam_locals = locals_start + fn.type.n_params;
std::memset((void *)nonparam_locals, 0,
(locals_end - nonparam_locals) * sizeof(WasmValue));
StackFrame prev = frame;
auto cf_start = control_stack.get_start();
frame = {locals_start, control_stack.get_start()};
control_stack.set_start(control_stack.unsafe_ptr());
control_stack.push({locals_start, return_to,
static_cast<uint32_t>(fn.type.n_results)});
interpret(fn.wasm_fn.start, stack, control_stack);
control_stack.set_start(cf_start);
frame = prev;
} else {
stack -= fn.type.n_params;
if (fn.static_fn != nullptr) {
fn.static_fn(stack.unsafe_ptr());
} else {
fn.dyn_fn(stack.unsafe_ptr());
}
stack += fn.type.n_results;
}
}
using Handler = void(Instance &, uint8_t *, tape<WasmValue> &,
tape<BrTarget> &);
#define HANDLER(name) \
void name(Instance &instance, uint8_t *iter, tape<WasmValue> &stack, \
tape<BrTarget> &control_stack)
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
using f32 = float;
using f64 = double;
static void __attribute__((noinline, preserve_most))
slow_memmove(WasmValue *dst, const WasmValue *src, size_t n) {
std::memmove(dst, src, n * sizeof(WasmValue));
}
/*
(functions and ifs are blocks)
enter into loop -> valid if stack <= param_type
enter into block -> valid if stack <= param_type
br depth is loop (enter) -> valid if stack <= param_type
br depth is block (exit) -> valid if stack <= return_type
exit from loop -> valid if stack == return_type
exit from block -> valid if stack == return_type
*/
static inline bool brk(Instance &, uint8_t *&iter, tape<WasmValue> &stack,
tape<BrTarget> &control_stack, uint32_t depth) {
control_stack -= depth;
BrTarget target = control_stack.pop();
stack -= target.arity;
std::memmove(target.stack, stack.unsafe_ptr(), sizeof(WasmValue));
if (target.arity > 1) [[unlikely]] {
slow_memmove(target.stack, stack.unsafe_ptr(), target.arity);
}
stack = target.stack + target.arity;
iter = target.dest;
return control_stack.empty();
};
#define BRK(depth) brk(instance, iter, stack, control_stack, depth)
#define UNARY_OP(type, op) \
stack[-1] = op(stack[-1].type); \
nextop()
#define TRUNC(type, op, lower, upper) \
{ \
if (!std::isfinite(stack[-1].type)) { \
if (std::isnan(stack[-1].type)) { \
trap("invalid conversion to integer"); \
} else { \
trap("integer overflow"); \
} \
} \
if (stack[-1].type <= lower || upper <= stack[-1].type) { \
trap("integer overflow"); \
} \
UNARY_OP(type, op); \
}
#define UNARY_FN(type, fn) \
stack[-1] = fn(stack[-1].type); \
nextop()
#define BINARY_OP(type, op) \
{ \
stack--; \
stack[-1] = stack[-1].type op stack[0].type; \
nextop(); \
}
#define BINARY_FN(type, fn) \
{ \
stack--; \
stack[-1] = fn(stack[-1].type, stack[0].type); \
nextop(); \
}
#define IDIV(type) \
{ \
stack--; \
if (stack[0].type == 0) { \
trap("integer divide by zero"); \
} \
if (std::is_signed_v<type> && \
stack[0].type == static_cast<type>(-1) && \
stack[-1].type == std::numeric_limits<type>::min()) { \
trap("integer overflow"); \
} \
stack[-1] = stack[-1].type / stack[0].type; \
nextop(); \
}
#define IREM(type) \
{ \
stack--; \
if (stack[0].type == 0) { \
trap("integer divide by zero"); \
} \
if (std::is_signed_v<type> && \
stack[0].type == static_cast<type>(-1) && \
stack[-1].type == std::numeric_limits<type>::min()) [[unlikely]] { \
stack[-1] = static_cast<type>(0); \
} else { \
stack[-1] = stack[-1].type % stack[0].type; \
} \
nextop(); \
}
#define MINMAX(type, fn) \
{ \
stack--; \
if (std::isnan(stack[-1].type) || std::isnan(stack[0].type)) { \
stack[-1].type = std::numeric_limits<type>::quiet_NaN(); \
} else { \
stack[-1].type = fn(stack[-1].type, stack[0].type); \
} \
nextop(); \
}
#define SHIFT(type, op) \
{ \
stack--; \
stack[-1] = stack[-1].type op(stack[0].type % (sizeof(type) * 8)); \
nextop(); \
}
#define TRUNC_SAT(from, to) \
{ \
if (stack[-1].from < (from)std::numeric_limits<to>::min()) { \
stack[-1].to = std::numeric_limits<to>::min(); \
} else if (stack[-1].from > (from)std::numeric_limits<to>::max()) { \
stack[-1].to = std::numeric_limits<to>::max(); \
} else { \
stack[-1].to = static_cast<to>(stack[-1].from); \
} \
nextop(); \
}
#define LOAD(type, memtype) \
{ \
uint32_t align = 1 << *iter++; \
uint32_t offset = read_leb128(iter); \
stack[-1].type = \
instance.memory->load<memtype>(stack[-1].u32, offset, align); \
nextop(); \
}
#define STORE(type, stacktype) \
{ \
stack -= 2; \
uint32_t align = 1 << *iter++; \
uint32_t offset = read_leb128(iter); \
instance.memory->store<type>(stack[0].u32, offset, align, \
static_cast<type>(stack[1].stacktype)); \
nextop(); \
}
#ifdef WASM_DEBUG
#define nextop() \
do { \
uint8_t byte = *iter++; \
std::cerr << "reading instruction " << instructions[byte] \
<< std::endl; \
std::cerr << "stack contents: "; \
for (WasmValue *p = instance.frame.locals; p < stack.unsafe_ptr(); \
p++) { \
std::cerr << p->u64 << " "; \
} \
std::cerr << std::endl << std::endl; \
[[clang::musttail]] return handlers[byte](instance, iter, stack, \
control_stack); \
} while (0)
#else
#define nextop() \
do { \
uint8_t byte = *iter++; \
[[clang::musttail]] return handlers[byte](instance, iter, stack, \
control_stack); \
} while (0)
#endif
#define DECL_HANDLER(name, str, byte) HANDLER(name);
FOREACH_INSTRUCTION(DECL_HANDLER)
FOREACH_MULTIBYTE_INSTRUCTION(DECL_HANDLER)
#undef DECL_HANDLER
consteval std::array<Handler *, 256> make_handlers() {
std::array<Handler *, 256> handlers = {};
#define DEFINE_LABEL(name, _, byte) handlers[byte] = &name;
FOREACH_INSTRUCTION(DEFINE_LABEL)
#undef DEFINE_LABEL
return handlers;
}
consteval std::array<Handler *, 256> make_fc_handlers() {
std::array<Handler *, 256> handlers = {};
#define DEFINE_LABEL(name, _, byte) handlers[byte] = &name;
FOREACH_MULTIBYTE_INSTRUCTION(DEFINE_LABEL)
#undef DEFINE_LABEL
return handlers;
}
static auto handlers = make_handlers();
static auto fc_handlers = make_fc_handlers();
void Instance::interpret(uint8_t *iter, tape<WasmValue> &stack,
tape<BrTarget> &control_stack) {
uint8_t byte = *iter++;
return handlers[byte](*this, iter, stack, control_stack);
}
HANDLER(unreachable) {
trap("unreachable");
nextop();
}
HANDLER(nop) { nextop(); }
HANDLER(block) {
auto sn = RuntimeType::read_blocktype(instance.types, iter);
if (instance.block_ends.empty())
__builtin_unreachable();
const auto &block_end = instance.block_ends.find(iter)->second;
control_stack.push({stack.unsafe_ptr() - sn.n_params, block_end,
static_cast<uint32_t>(sn.n_results)});
nextop();
}
HANDLER(loop) {
// reading blocktype each time maybe not efficient?
uint8_t *loop_start = iter - 1;
auto sn = RuntimeType::read_blocktype(instance.types, iter);
control_stack.push(
// iter - 1 so br goes back to the loop
{stack.unsafe_ptr() - sn.n_params, loop_start,
static_cast<uint32_t>(sn.n_params)});
nextop();
}
HANDLER(if_) {
auto sn = RuntimeType::read_blocktype(instance.types, iter);
uint32_t cond = stack.pop().u32;
if (instance.if_jumps.empty())
__builtin_unreachable();
const auto &if_jump = instance.if_jumps.find(iter)->second;
control_stack.push({stack.unsafe_ptr() - sn.n_params, if_jump.end,
static_cast<uint32_t>(sn.n_results)});
if (!cond)
iter = if_jump.else_;
nextop();
}
HANDLER(else_) {
// if the else block is reached, the if block is done
// might be faster to have another dictionary for else block ->
// end so this can just be iter = end_block todo: look at what
// compiler optimizes to
BRK(0);
nextop();
}
HANDLER(end) {
if (control_stack.size() == 1) {
// function end block
BRK(0);
return;
} else {
// we don't know if this is a block or loop
// so can't do brk(0)
// BUT validation has confirmed that the result is
// the only thing left on the stack, so we can just
// pop the control stack (since the result is already in
// place)
control_stack.pop();
}
nextop();
}
HANDLER(br) {
if (BRK(read_leb128(iter)))
return;
nextop();
}
HANDLER(br_if) {
uint32_t depth = read_leb128(iter);
if (stack.pop().u32)
if (BRK(depth))
return;
nextop();
}
HANDLER(br_table) {
uint32_t v = stack.pop().u32;
uint32_t n_targets = read_leb128(iter);
uint32_t target = -1, depth = std::numeric_limits<uint32_t>::max();
// <= because there's an extra for the default target
for (uint32_t i = 0; i <= n_targets; ++i) {
target = read_leb128(iter);
if (i == v)
depth = target;
}
// use default
if (depth == std::numeric_limits<uint32_t>::max())
depth = target;
if (BRK(depth))
return;
nextop();
}
HANDLER(return_) {
if (BRK(control_stack.size() - 1))
return;
nextop();
}
HANDLER(call) {
FunctionInfo &fn = instance.functions[read_leb128(iter)];
instance.call_function_info(fn, iter, stack, control_stack);
nextop();
}
HANDLER(call_indirect) {
uint32_t type_idx = read_leb128(iter);
uint32_t table_idx = read_leb128(iter);
uint32_t elem_idx = stack.pop().u32;
if (elem_idx >= instance.tables[table_idx]->size()) {
trap("undefined element");
}
Funcref funcref = instance.tables[table_idx]->get(elem_idx);
if (!funcref) {
trap("uninitialized element");
}
if (funcref->type != instance.types[type_idx]) {
trap("indirect call type mismatch");
}
// this is so bad, there's so much repetition
// entrypooint and call_function_info need to be revamped
auto &fn = *funcref;
if (fn.wasm_fn) {
fn.wasm_fn.instance->entrypoint(fn, stack, control_stack);
} else {
stack -= fn.type.n_params;
if (fn.static_fn != nullptr) {
fn.static_fn(stack.unsafe_ptr());
} else {
fn.dyn_fn(stack.unsafe_ptr());
}
stack += fn.type.n_results;
}
nextop();
}
HANDLER(drop) {
stack.pop();
nextop();
}
HANDLER(select) {
stack -= 2;
stack[-1] = stack[-!!stack[1].u32];
nextop();
}
HANDLER(select_t) {
/* uint32_t n_results = */ read_leb128(iter);
// skip result types
iter++;
stack -= 2;
stack[-1] = stack[-!!stack[1].u32];
nextop();
}
HANDLER(localget) {
stack.push(instance.frame.locals[read_leb128(iter)]);
nextop();
}
HANDLER(localset) {
instance.frame.locals[read_leb128(iter)] = stack.pop();
nextop();
}
HANDLER(localtee) {
instance.frame.locals[read_leb128(iter)] = stack[-1];
nextop();
}
HANDLER(tableget) {
stack.push(instance.tables[read_leb128(iter)]->get(stack.pop().u32));
nextop();
}
HANDLER(tableset) {
stack -= 2;
instance.tables[read_leb128(iter)]->set(stack[0].u32, stack[1]);
nextop();
}
HANDLER(globalget) {
stack.push(instance.globals[read_leb128(iter)]->value);
nextop();
}
HANDLER(globalset) {
instance.globals[read_leb128(iter)]->value = stack.pop();
nextop();
}
HANDLER(memorysize) {
/* uint32_t mem_idx = */ read_leb128(iter);
stack.push(instance.memory->size());
nextop();
}
HANDLER(memorygrow) {
/* uint32_t mem_idx = */ read_leb128(iter);
stack[-1].u32 = instance.memory->grow(stack[-1].u32);
nextop();
}
HANDLER(i32const) {
stack.push((int32_t)read_sleb128(iter));
nextop();
}
HANDLER(i64const) {
stack.push((int64_t)read_sleb128(iter));
nextop();
}
HANDLER(f32const) {
float x;
std::memcpy(&x, iter, sizeof(float));
stack.push(x);
iter += sizeof(float);
nextop();
}
HANDLER(f64const) {
double x;
std::memcpy(&x, iter, sizeof(double));
stack.push(x);
iter += sizeof(double);
nextop();
}
// clang-format off
HANDLER(i32load) { LOAD(u32, uint32_t); }
HANDLER(i64load) { LOAD(u64, uint64_t); }
HANDLER(f32load) { LOAD(f32, float); }
HANDLER(f64load) { LOAD(f64, double); }
HANDLER(i32load8_s) { LOAD(i32, int8_t); }
HANDLER(i32load8_u) { LOAD(u32, uint8_t); }
HANDLER(i32load16_s) { LOAD(i32, int16_t); }
HANDLER(i32load16_u) { LOAD(u32, uint16_t); }
HANDLER(i64load8_s) { LOAD(i64, int8_t); }
HANDLER(i64load8_u) { LOAD(u64, uint8_t); }
HANDLER(i64load16_s) { LOAD(i64, int16_t); }
HANDLER(i64load16_u) { LOAD(u64, uint16_t); }
HANDLER(i64load32_s) { LOAD(i64, int32_t); }
HANDLER(i64load32_u) { LOAD(u64, uint32_t); }
HANDLER(i32store) { STORE(uint32_t, u32); }
HANDLER(i64store) { STORE(uint64_t, u64); }
HANDLER(f32store) { STORE(float, f32); }
HANDLER(f64store) { STORE(double, f64); }
HANDLER(i32store8) { STORE(uint8_t, u32); }
HANDLER(i32store16) { STORE(uint16_t, u32); }
HANDLER(i64store8) { STORE(uint8_t, u64); }
HANDLER(i64store16) { STORE(uint16_t, u64); }
HANDLER(i64store32) { STORE(uint32_t, u64); }
HANDLER(i32eqz) { UNARY_OP (i32, 0 ==); }
HANDLER(i64eqz) { UNARY_OP (i64, 0 ==); }
HANDLER(i32eq) { BINARY_OP(i32, ==); }
HANDLER(i64eq) { BINARY_OP(i64, ==); }
HANDLER(i32ne) { BINARY_OP(i32, !=); }
HANDLER(i64ne) { BINARY_OP(i64, !=); }
HANDLER(i32lt_s) { BINARY_OP(i32, < ); }
HANDLER(i64lt_s) { BINARY_OP(i64, < ); }
HANDLER(i32lt_u) { BINARY_OP(u32, < ); }
HANDLER(i64lt_u) { BINARY_OP(u64, < ); }
HANDLER(i32gt_s) { BINARY_OP(i32, > ); }
HANDLER(i64gt_s) { BINARY_OP(i64, > ); }
HANDLER(i32gt_u) { BINARY_OP(u32, > ); }
HANDLER(i64gt_u) { BINARY_OP(u64, > ); }
HANDLER(i32le_s) { BINARY_OP(i32, <=); }
HANDLER(i64le_s) { BINARY_OP(i64, <=); }
HANDLER(i32le_u) { BINARY_OP(u32, <=); }
HANDLER(i64le_u) { BINARY_OP(u64, <=); }
HANDLER(i32ge_s) { BINARY_OP(i32, >=); }
HANDLER(i64ge_s) { BINARY_OP(i64, >=); }
HANDLER(i32ge_u) { BINARY_OP(u32, >=); }
HANDLER(i64ge_u) { BINARY_OP(u64, >=); }
HANDLER(f32eq) { BINARY_OP(f32, ==); }
HANDLER(f64eq) { BINARY_OP(f64, ==); }
HANDLER(f32ne) { BINARY_OP(f32, !=); }
HANDLER(f64ne) { BINARY_OP(f64, !=); }
HANDLER(f32lt) { BINARY_OP(f32, < ); }
HANDLER(f64lt) { BINARY_OP(f64, < ); }
HANDLER(f32gt) { BINARY_OP(f32, > ); }
HANDLER(f64gt) { BINARY_OP(f64, > ); }
HANDLER(f32le) { BINARY_OP(f32, <=); }
HANDLER(f64le) { BINARY_OP(f64, <=); }
HANDLER(f32ge) { BINARY_OP(f32, >=); }
HANDLER(f64ge) { BINARY_OP(f64, >=); }
HANDLER(i32clz) { UNARY_FN (u32, std::countl_zero); }
HANDLER(i64clz) { UNARY_FN (u64, (uint64_t)std::countl_zero); }
HANDLER(i32ctz) { UNARY_FN (u32, std::countr_zero); }
HANDLER(i64ctz) { UNARY_FN (u64, (uint64_t)std::countr_zero); }
HANDLER(i32popcnt) { UNARY_FN (u32, std::popcount); }
HANDLER(i64popcnt) { UNARY_FN (u64, (uint64_t)std::popcount); }
HANDLER(i32add) { BINARY_OP(u32, + ); }
HANDLER(i64add) { BINARY_OP(u64, + ); }
HANDLER(i32sub) { BINARY_OP(u32, - ); }
HANDLER(i64sub) { BINARY_OP(u64, - ); }
HANDLER(i32mul) { BINARY_OP(u32, * ); }
HANDLER(i64mul) { BINARY_OP(u64, * ); }
HANDLER(i32div_s) { IDIV (i32); }
HANDLER(i64div_s) { IDIV (i64); }
HANDLER(i32div_u) { IDIV (u32); }
HANDLER(i64div_u) { IDIV (u64); }
HANDLER(i32rem_s) { IREM (i32); }
HANDLER(i64rem_s) { IREM (i64); }
HANDLER(i32rem_u) { IREM (u32); }
HANDLER(i64rem_u) { IREM (u64); }
HANDLER(i32and) { BINARY_OP(u32, & ); }
HANDLER(i64and) { BINARY_OP(u64, & ); }
HANDLER(i32or) { BINARY_OP(u32, | ); }
HANDLER(i64or) { BINARY_OP(u64, | ); }
HANDLER(i32xor) { BINARY_OP(u32, ^ ); }
HANDLER(i64xor) { BINARY_OP(u64, ^ ); }
HANDLER(i32shl) { SHIFT (u32, <<); }
HANDLER(i64shl) { SHIFT (u64, <<); }
HANDLER(i32shr_s) { SHIFT (i32, >>); }
HANDLER(i64shr_s) { SHIFT (i64, >>); }
HANDLER(i32shr_u) { SHIFT (u32, >>); }
HANDLER(i64shr_u) { SHIFT (u64, >>); }
HANDLER(i32rotl) { BINARY_FN(u32, std::rotl); }
HANDLER(i64rotl) { BINARY_FN(u64, std::rotl); }
HANDLER(i32rotr) { BINARY_FN(u32, std::rotr); }
HANDLER(i64rotr) { BINARY_FN(u64, std::rotr); }
HANDLER(f32abs) { UNARY_FN (f32, std::abs); }
HANDLER(f64abs) { UNARY_FN (f64, std::abs); }
HANDLER(f32neg) { UNARY_OP (f32, -); }
HANDLER(f64neg) { UNARY_OP (f64, -); }
HANDLER(f32ceil) { UNARY_FN (f32, std::ceil); }
HANDLER(f64ceil) { UNARY_FN (f64, std::ceil); }
HANDLER(f32floor) { UNARY_FN (f32, std::floor); }
HANDLER(f64floor) { UNARY_FN (f64, std::floor); }
HANDLER(f32trunc) { UNARY_FN (f32, std::trunc); }
HANDLER(f64trunc) { UNARY_FN (f64, std::trunc); }
HANDLER(f32nearest) { UNARY_FN (f32, std::nearbyint); }
HANDLER(f64nearest) { UNARY_FN (f64, std::nearbyint); }
HANDLER(f32sqrt) { UNARY_FN (f32, std::sqrt); }
HANDLER(f64sqrt) { UNARY_FN (f64, std::sqrt); }
HANDLER(f32add) { BINARY_OP(f32, +); }
HANDLER(f64add) { BINARY_OP(f64, +); }
HANDLER(f32sub) { BINARY_OP(f32, -); }
HANDLER(f64sub) { BINARY_OP(f64, -); }
HANDLER(f32mul) { BINARY_OP(f32, *); }
HANDLER(f64mul) { BINARY_OP(f64, *); }
HANDLER(f32div) { BINARY_OP(f32, /); }
HANDLER(f64div) { BINARY_OP(f64, /); }
HANDLER(f32min) { MINMAX (f32, std::min); }
HANDLER(f64min) { MINMAX (f64, std::min); }
HANDLER(f32max) { MINMAX (f32, std::max); }
HANDLER(f64max) { MINMAX (f64, std::max); }
HANDLER(f32copysign) { BINARY_FN(f32, std::copysign); }