| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| #pragma once |
| |
| #if ENABLE(JIT) |
| |
| #include "CodeLocation.h" |
| #include "PropertyOffset.h" |
| |
| namespace JSC { |
| |
| class JSArray; |
| class Structure; |
| class StructureStubInfo; |
| class VM; |
| |
| class InlineAccess { |
| public: |
| |
| // This is the maximum between inline and out of line self access cases. |
| static constexpr size_t sizeForPropertyAccess() |
| { |
| #if CPU(X86_64) |
| return 23; |
| #elif CPU(X86) |
| return 27; |
| #elif CPU(ARM64) |
| return 40; |
| #elif CPU(ARM) |
| #if CPU(ARM_THUMB2) |
| return 48; |
| #else |
| return 52; |
| #endif |
| #elif CPU(MIPS) |
| return 72; |
| #else |
| #error "unsupported platform" |
| #endif |
| } |
| |
| // This is the maximum between inline and out of line property replace cases. |
| static constexpr size_t sizeForPropertyReplace() |
| { |
| #if CPU(X86_64) |
| return 23; |
| #elif CPU(X86) |
| return 27; |
| #elif CPU(ARM64) |
| return 40; |
| #elif CPU(ARM) |
| #if CPU(ARM_THUMB2) |
| return 48; |
| #else |
| return 48; |
| #endif |
| #elif CPU(MIPS) |
| return 72; |
| #else |
| #error "unsupported platform" |
| #endif |
| } |
| |
| // FIXME: Make this constexpr when GCC is able to compile std::max() inside a constexpr function. |
| // https://bugs.webkit.org/show_bug.cgi?id=159436 |
| // |
| // This is the maximum between the size for array length access, and the size for regular self access. |
| ALWAYS_INLINE static size_t sizeForLengthAccess() |
| { |
| #if CPU(X86_64) |
| size_t size = 26; |
| #elif CPU(X86) |
| size_t size = 27; |
| #elif CPU(ARM64) |
| size_t size = 32; |
| #elif CPU(ARM) |
| #if CPU(ARM_THUMB2) |
| size_t size = 30; |
| #else |
| size_t size = 32; |
| #endif |
| #elif CPU(MIPS) |
| size_t size = 56; |
| #else |
| #error "unsupported platform" |
| #endif |
| return std::max(size, sizeForPropertyAccess()); |
| } |
| |
| static bool generateSelfPropertyAccess(VM&, StructureStubInfo&, Structure*, PropertyOffset); |
| static bool canGenerateSelfPropertyReplace(StructureStubInfo&, PropertyOffset); |
| static bool generateSelfPropertyReplace(VM&, StructureStubInfo&, Structure*, PropertyOffset); |
| static bool isCacheableArrayLength(StructureStubInfo&, JSArray*); |
| static bool generateArrayLength(VM&, StructureStubInfo&, JSArray*); |
| static void rewireStubAsJump(VM&, StructureStubInfo&, CodeLocationLabel); |
| |
| // This is helpful when determining the size of an IC on |
| // various platforms. When adding a new type of IC, implement |
| // its placeholder code here, and log the size. That way we |
| // can intelligently choose sizes on various platforms. |
| NO_RETURN_DUE_TO_CRASH static void dumpCacheSizesAndCrash(VM&); |
| }; |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(JIT) |