// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2025 Niels Martignène <niels.martignene@protonmail.com>

#if defined(_WIN32) && (defined(__x86_64__) || defined(_M_AMD64))

#include "lib/native/base/base.hh"
#include "ffi.hh"
#include "call.hh"
#include "util.hh"
#include "win32.hh"

#include <napi.h>

namespace K {

struct BackRegisters {
    uint64_t rax;
    double xmm0;
};

extern "C" uint64_t ForwardCallG(const void *func, uint8_t *sp, uint8_t **out_old_sp);
extern "C" float ForwardCallF(const void *func, uint8_t *sp, uint8_t **out_old_sp);
extern "C" double ForwardCallD(const void *func, uint8_t *sp, uint8_t **out_old_sp);
extern "C" uint64_t ForwardCallXG(const void *func, uint8_t *sp, uint8_t **out_old_sp);
extern "C" float ForwardCallXF(const void *func, uint8_t *sp, uint8_t **out_old_sp);
extern "C" double ForwardCallXD(const void *func, uint8_t *sp, uint8_t **out_old_sp);

bool AnalyseFunction(Napi::Env, InstanceData *, FunctionInfo *func)
{
    func->ret.regular = IsRegularSize(func->ret.type->size, 8);

    for (ParameterInfo &param: func->parameters) {
        param.regular = IsRegularSize(param.type->size, 8);
        func->forward_fp |= IsFloat(param.type);
    }

    func->args_size = AlignLen(8 * std::max((Size)4, func->parameters.len + !func->ret.regular), 16);

    return true;
}

bool CallData::Prepare(const FunctionInfo *func, const Napi::CallbackInfo &info)
{
    uint64_t *args_ptr = nullptr;

    // Pass return value in register or through memory
    if (!AllocStack(func->args_size, 16, &args_ptr)) [[unlikely]]
        return false;
    if (!func->ret.regular) {
        return_ptr = AllocHeap(func->ret.type->size, 16);
        *(uint8_t **)(args_ptr++) = return_ptr;
    }

#define PUSH_INTEGER(CType) \
        do { \
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] { \
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value)); \
                return false; \
            } \
             \
            CType v = GetNumber<CType>(value); \
            *(args_ptr++) = (uint64_t)v; \
        } while (false)
#define PUSH_INTEGER_SWAP(CType) \
        do { \
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] { \
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value)); \
                return false; \
            } \
             \
            CType v = GetNumber<CType>(value); \
            *(args_ptr++) = (uint64_t)ReverseBytes(v); \
        } while (false)

    // Push arguments
    for (Size i = 0; i < func->parameters.len; i++) {
        const ParameterInfo &param = func->parameters[i];
        K_ASSERT(param.directions >= 1 && param.directions <= 3);

        Napi::Value value = info[param.offset];

        switch (param.type->primitive) {
            case PrimitiveKind::Void: { K_UNREACHABLE(); } break;

            case PrimitiveKind::Bool: {
                if (!value.IsBoolean()) [[unlikely]] {
                    ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected boolean", GetValueType(instance, value));
                    return false;
                }

                bool b = value.As<Napi::Boolean>();

                *(bool *)(args_ptr++) = b;
            } break;
            case PrimitiveKind::Int8: { PUSH_INTEGER(int8_t); } break;
            case PrimitiveKind::UInt8: { PUSH_INTEGER(uint8_t); } break;
            case PrimitiveKind::Int16: { PUSH_INTEGER(int16_t); } break;
            case PrimitiveKind::Int16S: { PUSH_INTEGER_SWAP(int16_t); } break;
            case PrimitiveKind::UInt16: { PUSH_INTEGER(uint16_t); } break;
            case PrimitiveKind::UInt16S: { PUSH_INTEGER_SWAP(uint16_t); } break;
            case PrimitiveKind::Int32: { PUSH_INTEGER(int32_t); } break;
            case PrimitiveKind::Int32S: { PUSH_INTEGER_SWAP(int32_t); } break;
            case PrimitiveKind::UInt32: { PUSH_INTEGER(uint32_t); } break;
            case PrimitiveKind::UInt32S: { PUSH_INTEGER_SWAP(uint32_t); } break;
            case PrimitiveKind::Int64: { PUSH_INTEGER(int64_t); } break;
            case PrimitiveKind::Int64S: { PUSH_INTEGER_SWAP(int64_t); } break;
            case PrimitiveKind::UInt64: { PUSH_INTEGER(uint64_t); } break;
            case PrimitiveKind::UInt64S: { PUSH_INTEGER_SWAP(uint64_t); } break;
            case PrimitiveKind::String: {
                const char *str;
                if (!PushString(value, param.directions, &str)) [[unlikely]]
                    return false;

                *(const char **)(args_ptr++) = str;
            } break;
            case PrimitiveKind::String16: {
                const char16_t *str16;
                if (!PushString16(value, param.directions, &str16)) [[unlikely]]
                    return false;

                *(const char16_t **)(args_ptr++) = str16;
            } break;
            case PrimitiveKind::String32: {
                const char32_t *str32;
                if (!PushString32(value, param.directions, &str32)) [[unlikely]]
                    return false;

                *(const char32_t **)(args_ptr++) = str32;
            } break;
            case PrimitiveKind::Pointer: {
                void *ptr;
                if (!PushPointer(value, param.type, param.directions, &ptr)) [[unlikely]]
                    return false;

                *(void **)(args_ptr++) = ptr;
            } break;
            case PrimitiveKind::Record:
            case PrimitiveKind::Union: {
                if (!IsObject(value)) [[unlikely]] {
                    ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected object", GetValueType(instance, value));
                    return false;
                }

                uint8_t *ptr;
                if (param.regular) {
                    ptr = (uint8_t *)(args_ptr++);
                } else {
                    ptr = AllocHeap(param.type->size, 16);
                    *(uint8_t **)(args_ptr++) = ptr;
                }

                Napi::Object obj = value.As<Napi::Object>();
                if (!PushObject(obj, param.type, ptr))
                    return false;
            } break;
            case PrimitiveKind::Array: { K_UNREACHABLE(); } break;
            case PrimitiveKind::Float32: {
                if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] {
                    ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value));
                    return false;
                }

                float f = GetNumber<float>(value);

                memset((uint8_t *)args_ptr + 4, 0, 4);
                *(float *)(args_ptr++) = f;
            } break;
            case PrimitiveKind::Float64: {
                if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] {
                    ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value));
                    return false;
                }

                double d = GetNumber<double>(value);
                *(double *)(args_ptr++) = d;
            } break;
            case PrimitiveKind::Callback: {
                void *ptr;
                if (!PushCallback(value, param.type, &ptr)) [[unlikely]]
                    return false;

                *(void **)(args_ptr++) = ptr;
            } break;

            case PrimitiveKind::Prototype: { K_UNREACHABLE(); } break;
        }
    }

#undef PUSH_INTEGER_SWAP
#undef PUSH_INTEGER

    new_sp = mem->stack.end();

    return true;
}

void CallData::Execute(const FunctionInfo *func, void *native)
{
    TEB *teb = GetTEB();

    // Restore previous stack limits at the end
    K_DEFER_C(exception_list = teb->ExceptionList,
              base = teb->StackBase,
              limit = teb->StackLimit,
              dealloc = teb->DeallocationStack,
              guaranteed = teb->GuaranteedStackBytes,
              stfs = teb->SameTebFlags) {
        teb->ExceptionList = exception_list;
        teb->StackBase = base;
        teb->StackLimit = limit;
        teb->DeallocationStack = dealloc;
        teb->GuaranteedStackBytes = guaranteed;
        teb->SameTebFlags = stfs;

        instance->last_error = teb->LastErrorValue;
    };

    // Adjust stack limits so SEH works correctly
    teb->ExceptionList = (void *)-1; // EXCEPTION_CHAIN_END
    teb->StackBase = mem->stack0.end();
    teb->StackLimit = mem->stack0.ptr;
    teb->DeallocationStack = mem->stack0.ptr;
    teb->GuaranteedStackBytes = 0;
    teb->SameTebFlags &= ~0x200;

    teb->LastErrorValue = instance->last_error;

#define PERFORM_CALL(Suffix) \
        ([&]() { \
            auto ret = (func->forward_fp ? ForwardCallX ## Suffix(native, new_sp, &old_sp) \
                                         : ForwardCall ## Suffix(native, new_sp, &old_sp)); \
            return ret; \
        })()

    switch (func->ret.type->primitive) {
        case PrimitiveKind::Void:
        case PrimitiveKind::Bool:
        case PrimitiveKind::Int8:
        case PrimitiveKind::UInt8:
        case PrimitiveKind::Int16:
        case PrimitiveKind::Int16S:
        case PrimitiveKind::UInt16:
        case PrimitiveKind::UInt16S:
        case PrimitiveKind::Int32:
        case PrimitiveKind::Int32S:
        case PrimitiveKind::UInt32:
        case PrimitiveKind::UInt32S:
        case PrimitiveKind::Int64:
        case PrimitiveKind::Int64S:
        case PrimitiveKind::UInt64:
        case PrimitiveKind::UInt64S:
        case PrimitiveKind::String:
        case PrimitiveKind::String16:
        case PrimitiveKind::String32:
        case PrimitiveKind::Pointer:
        case PrimitiveKind::Record:
        case PrimitiveKind::Union:
        case PrimitiveKind::Callback: { result.u64 = PERFORM_CALL(G); } break;
        case PrimitiveKind::Array: { K_UNREACHABLE(); } break;
        case PrimitiveKind::Float32: { result.f = PERFORM_CALL(F); } break;
        case PrimitiveKind::Float64: { result.d = PERFORM_CALL(D); } break;

        case PrimitiveKind::Prototype: { K_UNREACHABLE(); } break;
    }

#undef PERFORM_CALL
}

Napi::Value CallData::Complete(const FunctionInfo *func)
{
    K_DEFER {
       PopOutArguments();

        if (func->ret.type->dispose) {
            func->ret.type->dispose(env, func->ret.type, result.ptr);
        }
    };

    switch (func->ret.type->primitive) {
        case PrimitiveKind::Void: return env.Undefined();
        case PrimitiveKind::Bool: return Napi::Boolean::New(env, result.u8 & 0x1);
        case PrimitiveKind::Int8: return Napi::Number::New(env, (double)result.i8);
        case PrimitiveKind::UInt8: return Napi::Number::New(env, (double)result.u8);
        case PrimitiveKind::Int16: return Napi::Number::New(env, (double)result.i16);
        case PrimitiveKind::Int16S: return Napi::Number::New(env, (double)ReverseBytes(result.i16));
        case PrimitiveKind::UInt16: return Napi::Number::New(env, (double)result.u16);
        case PrimitiveKind::UInt16S: return Napi::Number::New(env, (double)ReverseBytes(result.u16));
        case PrimitiveKind::Int32: return Napi::Number::New(env, (double)result.i32);
        case PrimitiveKind::Int32S: return Napi::Number::New(env, (double)ReverseBytes(result.i32));
        case PrimitiveKind::UInt32: return Napi::Number::New(env, (double)result.u32);
        case PrimitiveKind::UInt32S: return Napi::Number::New(env, (double)ReverseBytes(result.u32));
        case PrimitiveKind::Int64: return NewBigInt(env, result.i64);
        case PrimitiveKind::Int64S: return NewBigInt(env, ReverseBytes(result.i64));
        case PrimitiveKind::UInt64: return NewBigInt(env, result.u64);
        case PrimitiveKind::UInt64S: return NewBigInt(env, ReverseBytes(result.u64));
        case PrimitiveKind::String: return result.ptr ? Napi::String::New(env, (const char *)result.ptr) : env.Null();
        case PrimitiveKind::String16: return result.ptr ? Napi::String::New(env, (const char16_t *)result.ptr) : env.Null();
        case PrimitiveKind::String32: return result.ptr ? MakeStringFromUTF32(env, (const char32_t *)result.ptr) : env.Null();
        case PrimitiveKind::Pointer:
        case PrimitiveKind::Callback: {
            if (result.ptr) {
                Napi::External<void> external = Napi::External<void>::New(env, result.ptr);
                SetValueTag(external, func->ret.type->ref.marker);

                return external;
            } else {
                return env.Null();
            }
        } break;
        case PrimitiveKind::Record:
        case PrimitiveKind::Union: {
            const uint8_t *ptr = return_ptr ? (const uint8_t *)return_ptr
                                            : (const uint8_t *)&result.buf;

            Napi::Object obj = DecodeObject(env, ptr, func->ret.type);
            return obj;
        } break;
        case PrimitiveKind::Array: { K_UNREACHABLE(); } break;
        case PrimitiveKind::Float32: return Napi::Number::New(env, (double)result.f);
        case PrimitiveKind::Float64: return Napi::Number::New(env, result.d);

        case PrimitiveKind::Prototype: { K_UNREACHABLE(); } break;
    }

    K_UNREACHABLE();
}

void CallData::Relay(Size idx, uint8_t *sp)
{
    const TrampolineInfo &trampoline = shared.trampolines[idx];

    uint8_t *own_sp = sp;
    uint8_t *caller_sp = sp + 128;
    BackRegisters *out_reg = (BackRegisters *)(sp + 64);

    const FunctionInfo *proto = trampoline.proto;
    Napi::Function func = trampoline.func.Value();

    uint64_t *gpr_ptr = (uint64_t *)own_sp;
    uint64_t *xmm_ptr = gpr_ptr + 4;
    uint64_t *args_ptr = (uint64_t *)caller_sp;

    uint8_t *return_ptr = !proto->ret.regular ? (uint8_t *)gpr_ptr[0] : nullptr;

    K_DEFER_N(err_guard) { memset(out_reg, 0, K_SIZE(*out_reg)); };

    LocalArray<napi_value, MaxParameters + 1> arguments;

    arguments.Append(!trampoline.recv.IsEmpty() ? trampoline.recv.Value() : env.Undefined());

    // Convert to JS arguments
    for (Size i = 0, j = !!return_ptr; i < proto->parameters.len; i++, j++) {
        const ParameterInfo &param = proto->parameters[i];
        K_ASSERT(param.directions >= 1 && param.directions <= 3);

        switch (param.type->primitive) {
            case PrimitiveKind::Void: { K_UNREACHABLE(); } break;

            case PrimitiveKind::Bool: {
                bool b = *(bool *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Boolean::New(env, b);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int8: {
                double d = (double)*(int8_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt8: {
                double d = (double)*(uint8_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int16: {
                double d = (double)*(int16_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int16S: {
                int16_t v = *(int16_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                double d = (double)ReverseBytes(v);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt16: {
                double d = (double)*(uint16_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt16S: {
                uint16_t v = *(uint16_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                double d = (double)ReverseBytes(v);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int32: {
                double d = (double)*(int32_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int32S: {
                int32_t v = *(int32_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                double d = (double)ReverseBytes(v);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt32: {
                double d = (double)*(uint32_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt32S: {
                uint32_t v = *(uint32_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                double d = (double)ReverseBytes(v);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int64: {
                int64_t v = *(int64_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = NewBigInt(env, v);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Int64S: {
                int64_t v = *(int64_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = NewBigInt(env, ReverseBytes(v));
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt64: {
                uint64_t v = *(uint64_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = NewBigInt(env, v);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::UInt64S: {
                uint64_t v = *(uint64_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = NewBigInt(env, ReverseBytes(v));
                arguments.Append(arg);
            } break;
            case PrimitiveKind::String: {
                const char *str = *(const char **)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = str ? Napi::String::New(env, str) : env.Null();
                arguments.Append(arg);

                if (param.type->dispose) {
                    param.type->dispose(env, param.type, str);
                }
            } break;
            case PrimitiveKind::String16: {
                const char16_t *str16 = *(const char16_t **)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = str16 ? Napi::String::New(env, str16) : env.Null();
                arguments.Append(arg);

                if (param.type->dispose) {
                    param.type->dispose(env, param.type, str16);
                }
            } break;
            case PrimitiveKind::String32: {
                const char32_t *str32 = *(const char32_t **)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = str32 ? MakeStringFromUTF32(env, str32) : env.Null();
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Pointer:
            case PrimitiveKind::Callback: {
                void *ptr2 = *(void **)(j < 4 ? gpr_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                if (ptr2) {
                    Napi::External<void> external = Napi::External<void>::New(env, ptr2);
                    SetValueTag(external, param.type->ref.marker);

                    arguments.Append(external);
                } else {
                    arguments.Append(env.Null());
                }

                if (param.type->dispose) {
                    param.type->dispose(env, param.type, ptr2);
                }
            } break;
            case PrimitiveKind::Record:
            case PrimitiveKind::Union: {
                uint8_t *ptr;
                if (param.regular) {
                    ptr = (uint8_t *)(j < 4 ? gpr_ptr + j : args_ptr);
                } else {
                    ptr = *(uint8_t **)(j < 4 ? gpr_ptr + j : args_ptr);
                }
                args_ptr += (j >= 4);

                Napi::Object obj2 = DecodeObject(env, ptr, param.type);
                arguments.Append(obj2);
            } break;
            case PrimitiveKind::Array: { K_UNREACHABLE(); } break;
            case PrimitiveKind::Float32: {
                float f = *(float *)(j < 4 ? xmm_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, (double)f);
                arguments.Append(arg);
            } break;
            case PrimitiveKind::Float64: {
                double d = *(double *)(j < 4 ? xmm_ptr + j : args_ptr);
                args_ptr += (j >= 4);

                Napi::Value arg = Napi::Number::New(env, d);
                arguments.Append(arg);
            } break;

            case PrimitiveKind::Prototype: { K_UNREACHABLE(); } break;
        }
    }

    const TypeInfo *type = proto->ret.type;

    // Make the call!
    Napi::Value value = func.Call(arguments[0], arguments.len - 1, arguments.data + 1);

    if (env.IsExceptionPending()) [[unlikely]]
        return;

#define RETURN_INTEGER(CType) \
        do { \
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] { \
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value)); \
                return; \
            } \
             \
            CType v = GetNumber<CType>(value); \
            out_reg->rax = (uint64_t)v; \
        } while (false)
#define RETURN_INTEGER_SWAP(CType) \
        do { \
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] { \
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value)); \
                return; \
            } \
             \
            CType v = GetNumber<CType>(value); \
            out_reg->rax = (uint64_t)ReverseBytes(v); \
        } while (false)

    switch (type->primitive) {
        case PrimitiveKind::Void: {} break;
        case PrimitiveKind::Bool: {
            if (!value.IsBoolean()) [[unlikely]] {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected boolean", GetValueType(instance, value));
                return;
            }

            bool b = value.As<Napi::Boolean>();
            out_reg->rax = (uint64_t)b;
        } break;
        case PrimitiveKind::Int8: { RETURN_INTEGER(int8_t); } break;
        case PrimitiveKind::UInt8: { RETURN_INTEGER(uint8_t); } break;
        case PrimitiveKind::Int16: { RETURN_INTEGER(int16_t); } break;
        case PrimitiveKind::Int16S: { RETURN_INTEGER_SWAP(int16_t); } break;
        case PrimitiveKind::UInt16: { RETURN_INTEGER(uint16_t); } break;
        case PrimitiveKind::UInt16S: { RETURN_INTEGER_SWAP(uint16_t); } break;
        case PrimitiveKind::Int32: { RETURN_INTEGER(int32_t); } break;
        case PrimitiveKind::Int32S: { RETURN_INTEGER_SWAP(int32_t); } break;
        case PrimitiveKind::UInt32: { RETURN_INTEGER(uint32_t); } break;
        case PrimitiveKind::UInt32S: { RETURN_INTEGER_SWAP(uint32_t); } break;
        case PrimitiveKind::Int64: { RETURN_INTEGER(int64_t); } break;
        case PrimitiveKind::Int64S: { RETURN_INTEGER_SWAP(int64_t); } break;
        case PrimitiveKind::UInt64: { RETURN_INTEGER(uint64_t); } break;
        case PrimitiveKind::UInt64S: { RETURN_INTEGER_SWAP(uint64_t); } break;
        case PrimitiveKind::String: {
            const char *str;
            if (!PushString(value, 1, &str)) [[unlikely]]
                return;

            out_reg->rax = (uint64_t)str;
        } break;
        case PrimitiveKind::String16: {
            const char16_t *str16;
            if (!PushString16(value, 1, &str16)) [[unlikely]]
                return;

            out_reg->rax = (uint64_t)str16;
        } break;
        case PrimitiveKind::String32: {
            const char32_t *str32;
            if (!PushString32(value, 1, &str32)) [[unlikely]]
                return;

            out_reg->rax = (uint64_t)str32;
        } break;
        case PrimitiveKind::Pointer: {
            uint8_t *ptr;

            if (CheckValueTag(value, type->ref.marker)) {
                ptr = value.As<Napi::External<uint8_t>>().Data();
            } else if (IsObject(value) && (type->ref.type->primitive == PrimitiveKind::Record ||
                                           type->ref.type->primitive == PrimitiveKind::Union)) {
                Napi::Object obj = value.As<Napi::Object>();

                ptr = AllocHeap(type->ref.type->size, 16);

                if (!PushObject(obj, type->ref.type, ptr))
                    return;
            } else if (IsNullOrUndefined(value)) {
                ptr = nullptr;
            } else {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected %2", GetValueType(instance, value), type->name);
                return;
            }

            out_reg->rax = (uint64_t)ptr;
        } break;
        case PrimitiveKind::Record:
        case PrimitiveKind::Union: {
            if (!IsObject(value)) [[unlikely]] {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected object", GetValueType(instance, value));
                return;
            }

            Napi::Object obj = value.As<Napi::Object>();

            if (return_ptr) {
                if (!PushObject(obj, type, return_ptr))
                    return;
                out_reg->rax = (uint64_t)return_ptr;
            } else {
                PushObject(obj, type, (uint8_t *)&out_reg->rax);
            }
        } break;
        case PrimitiveKind::Array: { K_UNREACHABLE(); } break;
        case PrimitiveKind::Float32: {
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value));
                return;
            }

            float f = GetNumber<float>(value);

            memset((uint8_t *)&out_reg->xmm0 + 4, 0, 4);
            memcpy(&out_reg->xmm0, &f, 4);
        } break;
        case PrimitiveKind::Float64: {
            if (!value.IsNumber() && !value.IsBigInt()) [[unlikely]] {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected number", GetValueType(instance, value));
                return;
            }

            double d = GetNumber<double>(value);
            out_reg->xmm0 = d;
        } break;
        case PrimitiveKind::Callback: {
            void *ptr;

            if (value.IsFunction()) {
                Napi::Function func2 = value.As<Napi::Function>();

                ptr = ReserveTrampoline(type->ref.proto, func2);
                if (!ptr) [[unlikely]]
                    return;
            } else if (CheckValueTag(value, type->ref.marker)) {
                ptr = value.As<Napi::External<void>>().Data();
            } else if (IsNullOrUndefined(value)) {
                ptr = nullptr;
            } else {
                ThrowError<Napi::TypeError>(env, "Unexpected %1 value, expected %2", GetValueType(instance, value), type->name);
                return;
            }

            out_reg->rax = (uint64_t)ptr;
        } break;

        case PrimitiveKind::Prototype: { K_UNREACHABLE(); } break;
    }

#undef RETURN_INTEGER_SWAP
#undef RETURN_INTEGER

    err_guard.Disable();
}

}

#endif
