/* * Copyright (C) 2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #if ENABLE(B3_JIT) #include "AirArg.h" #include "B3AtomicValue.h" namespace JSC { namespace B3 { inline bool MemoryValue::isLegalOffsetImpl(int32_t offset) const { // NOTE: This is inline because it constant-folds to true on x86! // So far only X86 allows exotic loads to have an offset. if (requiresSimpleAddr()) return !offset; return Air::Arg::isValidAddrForm(offset, accessWidth()); } inline bool MemoryValue::requiresSimpleAddr() const { return !isX86() && isExotic(); } inline Width MemoryValue::accessWidth() const { switch (opcode()) { case Load8Z: case Load8S: case Store8: return Width8; case Load16Z: case Load16S: case Store16: return Width16; case Load: return widthForType(type()); case Store: return widthForType(child(0)->type()); case AtomicWeakCAS: case AtomicStrongCAS: case AtomicXchgAdd: case AtomicXchgAnd: case AtomicXchgOr: case AtomicXchgSub: case AtomicXchgXor: case AtomicXchg: return as<AtomicValue>()->accessWidth(); default: RELEASE_ASSERT_NOT_REACHED(); return Width8; } } } } // namespace JSC::B3 #endif // ENABLE(B3_JIT)