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Copy pathBytecodeConventions.h
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36 lines (33 loc) · 2.02 KB
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/*
* Copyright (C) 2012, 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.
*/
#pragma once
// Register numbers used in bytecode operations have different meaning according to their ranges:
// 0x80000000-0xFFFFFFFF Negative indices from the CallFrame pointer are entries in the call frame.
// 0x00000000-0x3FFFFFFF Forwards indices from the CallFrame pointer are local vars and temporaries with the function's callframe.
// 0x40000000-0x7FFFFFFF Positive indices from 0x40000000 specify entries in the constant pool on the CodeBlock.
static constexpr int FirstConstantRegisterIndex = 0x40000000;
static constexpr int FirstConstantRegisterIndex8 = 16;
static constexpr int FirstConstantRegisterIndex16 = 64;
static constexpr int FirstConstantRegisterIndex32 = FirstConstantRegisterIndex;