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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef vm_TypeofEqOperand_h
#define vm_TypeofEqOperand_h
#include "mozilla/Assertions.h" // MOZ_ASSERT
#include <stdint.h> // uint8_t
#include "jspubtd.h" // JSType
#include "vm/Opcodes.h" // JSOp
namespace js {
struct TypeofEqOperand {
static constexpr uint8_t TYPE_MASK = 0x0f;
static constexpr uint8_t NEQ_BIT = 0x80;
private:
uint8_t value;
static uint8_t toNeqBit(JSOp compareOp) {
MOZ_ASSERT(compareOp == JSOp::Eq || compareOp == JSOp::Ne);
return compareOp == JSOp::Ne ? NEQ_BIT : 0;
}
explicit TypeofEqOperand(uint8_t value) : value(value) {}
public:
TypeofEqOperand(JSType type, JSOp compareOp)
: value(type | toNeqBit(compareOp)) {}
static TypeofEqOperand fromRawValue(uint8_t value) {
return TypeofEqOperand(value);
}
JSType type() const { return JSType(value & TYPE_MASK); }
JSOp compareOp() const { return (value & NEQ_BIT) ? JSOp::Ne : JSOp::Eq; }
uint8_t rawValue() const { return value; }
};
static_assert((JSTYPE_LIMIT & TypeofEqOperand::TYPE_MASK) == JSTYPE_LIMIT);
} // namespace js
#endif // vm_TypeofEqOperand_h