/* * Copyright (C) 2016 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. */ #ifndef AirKind_h #define AirKind_h #if ENABLE(B3_JIT) #include "AirOpcode.h" #include <wtf/PrintStream.h> namespace JSC { namespace B3 { namespace Air { // Air opcodes are always carried around with some flags. These flags are understood as having no // meaning if they are set for an opcode to which they do not apply. This makes sense, since Air // is a complex instruction set and most of these flags can apply to basically any opcode. In // fact, it's recommended to only represent something as a flag if you believe that it is largely // opcode-agnostic. struct Kind { Kind(Opcode opcode) : opcode(opcode) , effects(false) { } Kind() : Kind(Nop) { } bool operator==(const Kind& other) const { return opcode == other.opcode && effects == other.effects; } bool operator!=(const Kind& other) const { return !(*this == other); } unsigned hash() const { return static_cast<unsigned>(opcode) + (static_cast<unsigned>(effects) << 16); } explicit operator bool() const { return *this != Kind(); } void dump(PrintStream&) const; Opcode opcode; // This is an opcode-agnostic flag that indicates that we expect that this instruction will do // any of the following: // - Trap. // - Perform some non-arg non-control effect. bool effects : 1; }; } } } // namespace JSC::B3::Air #endif // ENABLE(B3_JIT) #endif // AirKind_h