Exemplo n.º 1
0
    Var AsmJsExternalEntryPoint(RecyclableObject* entryObject, CallInfo callInfo, ...)
    {
        ARGUMENTS(args, callInfo);
        ScriptFunction* func = (ScriptFunction*)entryObject;
        FunctionBody* body = func->GetFunctionBody();
        AsmJsFunctionInfo* info = body->GetAsmJsFunctionInfo();
        ScriptContext* scriptContext = func->GetScriptContext();
        const uint argInCount = callInfo.Count - 1;
        int argSize = info->GetArgByteSize();
        char* dst;
        Var returnValue = 0;

        AsmJsModuleInfo::EnsureHeapAttached(func);

        argSize = ::Math::Align<int32>(argSize, 8);
        // Allocate stack space for args

        __asm
        {
            sub esp, argSize
            mov dst, esp
        };

        // Unbox Var to primitive type
        {
            int32 intVal; double doubleVal; float floatVal;
            for (ArgSlot i = 0; i < info->GetArgCount(); i++)
            {
                if (info->GetArgType(i).isInt())
                {
                    if (i < argInCount)
                    {
                        intVal = JavascriptMath::ToInt32(args.Values[i + 1], scriptContext);
                    }
                    else
                    {
                        intVal = 0;
                    }
                    *(int32*)dst = intVal;
                    dst += sizeof(int32);
                }
                else if (info->GetArgType(i).isFloat())
                {
                    if (i < argInCount)
                    {
                        floatVal = (float)(JavascriptConversion::ToNumber(args.Values[i + 1], scriptContext));
                    }
                    else
                    {
                        floatVal = (float)(JavascriptNumber::NaN);
                    }
                    *(float*)dst = floatVal;
                    dst += sizeof(float);
                }
                else if (info->GetArgType(i).isDouble())
                {
                    if (i < argInCount)
                    {
                        doubleVal = JavascriptConversion::ToNumber(args.Values[i + 1], scriptContext);
                    }
                    else
                    {
                        doubleVal = JavascriptNumber::NaN;
                    }
                    *(double*)dst = doubleVal;
                    dst += sizeof(double);
                }
                else if (info->GetArgType(i).isSIMD())
                {
                    AsmJsVarType argType = info->GetArgType(i);
                    AsmJsSIMDValue simdVal;
                    // SIMD values are copied unaligned.
                    // SIMD values cannot be implicitly coerced from/to other types. If the SIMD parameter is missing (i.e. Undefined), we throw type error since there is not equivalent SIMD value to coerce to.
                    switch (argType.which())
                    {
                    case AsmJsType::Int32x4:
                        if (i >= argInCount || !JavascriptSIMDInt32x4::Is(args.Values[i + 1]))
                        {
                            JavascriptError::ThrowTypeError(scriptContext, JSERR_SimdInt32x4TypeMismatch, L"Int32x4");
                        }
                        simdVal = ((JavascriptSIMDInt32x4*)(args.Values[i + 1]))->GetValue();
                        break;
                    case AsmJsType::Float32x4:
                        if (i >= argInCount || !JavascriptSIMDFloat32x4::Is(args.Values[i + 1]))
                        {
                            JavascriptError::ThrowTypeError(scriptContext, JSERR_SimdFloat32x4TypeMismatch, L"Float32x4");
                        }
                        simdVal = ((JavascriptSIMDFloat32x4*)(args.Values[i + 1]))->GetValue();
                        break;
                    case AsmJsType::Float64x2:
                        if (i >= argInCount || !JavascriptSIMDFloat64x2::Is(args.Values[i + 1]))
                        {
                            JavascriptError::ThrowTypeError(scriptContext, JSERR_SimdFloat64x2TypeMismatch, L"Float64x2");
                        }
                        simdVal = ((JavascriptSIMDFloat64x2*)(args.Values[i + 1]))->GetValue();
                        break;
                    default:
                        Assert(UNREACHED);
                    }
                    *(AsmJsSIMDValue*)dst = simdVal;
                    dst += sizeof(AsmJsSIMDValue);
                }
                else
                {
                    AssertMsg(UNREACHED, "Invalid function arg type.");
                }
            }
        }

        const void * asmJSEntryPoint = func->GetEntryPointInfo()->address;
        // make call and convert primitive type back to Var
        switch (info->GetReturnType().which())
        {
        case AsmJsRetType::Void:
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
            }
            returnValue = JavascriptOperators::OP_LdUndef(func->GetScriptContext());
            break;
        case AsmJsRetType::Signed:{
            int32 ival = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                mov ival, eax
            }
            returnValue = JavascriptNumber::ToVar(ival, func->GetScriptContext());
            break;
        }
        case AsmJsRetType::Double:{
            double dval = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movsd dval, xmm0
            }
            returnValue = JavascriptNumber::New(dval, func->GetScriptContext());
            break;
        }
        case AsmJsRetType::Float:{
            float fval = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movss fval, xmm0
            }
            returnValue = JavascriptNumber::New((double)fval, func->GetScriptContext());
            break;
        }
        case AsmJsRetType::Int32x4:
            AsmJsSIMDValue simdVal;
            simdVal.Zero();
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movups simdVal, xmm0
            }
            returnValue = JavascriptSIMDInt32x4::New(&simdVal, func->GetScriptContext());
            break;

        case AsmJsRetType::Float32x4:
            simdVal.Zero();
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movups simdVal, xmm0
            }
                returnValue = JavascriptSIMDFloat32x4::New(&simdVal, func->GetScriptContext());
                break;

        case AsmJsRetType::Float64x2:
            simdVal.Zero();
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movups simdVal, xmm0
            }
            returnValue = JavascriptSIMDFloat64x2::New(&simdVal, func->GetScriptContext());
            break;

        default:
            Assume(UNREACHED);
        }
        return returnValue;
    }
Exemplo n.º 2
0
    Var AsmJsExternalEntryPoint(RecyclableObject* entryObject, CallInfo callInfo, ...)
    {
        ARGUMENTS(args, callInfo);
        ScriptFunction* func = (ScriptFunction*)entryObject;
        FunctionBody* body = func->GetFunctionBody();
        AsmJsFunctionInfo* info = body->GetAsmJsFunctionInfo();
        int argSize = info->GetArgByteSize();
        void* dst;
        Var returnValue = 0;

        argSize = ::Math::Align<int32>(argSize, 8);
        // Allocate stack space for args
        PROBE_STACK_CALL(func->GetScriptContext(), func, argSize + Js::Constants::MinStackDefault);

        dst = _alloca(argSize);
        const void * asmJSEntryPoint = UnboxAsmJsArguments(func, args.Values + 1, ((char*)dst) - MachPtr, callInfo);

        // make call and convert primitive type back to Var
        switch (info->GetReturnType().which())
        {
        case AsmJsRetType::Void:
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
            }
            returnValue = JavascriptOperators::OP_LdUndef(func->GetScriptContext());
            break;
        case AsmJsRetType::Signed:{
            int32 ival = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                mov ival, eax
            }
            returnValue = JavascriptNumber::ToVar(ival, func->GetScriptContext());
            break;
        }
        case AsmJsRetType::Int64:
        {
            int32 iLow = 0, iHigh = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                mov iLow, eax;
                mov iHigh, edx;
            }
#if ENABLE_DEBUG_CONFIG_OPTIONS
            if (CONFIG_FLAG(WasmI64))
            {
                uint64 lHigh = ((uint64)iHigh) << 32;
                uint64 lLow = (uint64)(uint32)iLow;
                returnValue = CreateI64ReturnObject((int64)(lHigh | lLow), func->GetScriptContext());
                break;
            }
#endif
            JavascriptError::ThrowTypeError(func->GetScriptContext(), WASMERR_InvalidTypeConversion);
        }
        case AsmJsRetType::Double:{
            double dval = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movsd dval, xmm0
            }
            returnValue = JavascriptNumber::NewWithCheck(dval, func->GetScriptContext());
            break;
        }
        case AsmJsRetType::Float:{
            float fval = 0;
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movss fval, xmm0
            }
            returnValue = JavascriptNumber::NewWithCheck((double)fval, func->GetScriptContext());
            break;
        }
#ifdef ENABLE_WASM_SIMD
        case AsmJsRetType::Bool32x4:
        case AsmJsRetType::Bool16x8:
        case AsmJsRetType::Bool8x16:
        case AsmJsRetType::Float32x4:
        case AsmJsRetType::Float64x2:
        case AsmJsRetType::Int64x2:
        case AsmJsRetType::Int32x4:
        case AsmJsRetType::Int16x8:
        case AsmJsRetType::Int8x16:
        case AsmJsRetType::Uint32x4:
        case AsmJsRetType::Uint16x8:
        case AsmJsRetType::Uint8x16:
            AsmJsSIMDValue simdVal;
            simdVal.Zero();
            __asm
            {
                mov  ecx, asmJSEntryPoint
#ifdef _CONTROL_FLOW_GUARD
                call[__guard_check_icall_fptr]
#endif
                push func
                call ecx
                movups simdVal, xmm0
            }
            // Todo:: support test return object (like int64) for wasm.simd
            JavascriptError::ThrowTypeError(func->GetScriptContext(), WASMERR_InvalidTypeConversion);
            break;
#endif
        default:
            Assume(UNREACHED);
            JavascriptError::ThrowTypeError(func->GetScriptContext(), WASMERR_InvalidTypeConversion);
        }
        return returnValue;
    }