mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-12 20:08:13 +00:00
160 lines
3.4 KiB
C++
160 lines
3.4 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(B3_JIT)
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#include "B3Bank.h"
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#include "B3Type.h"
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#if !ASSERT_ENABLED
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IGNORE_RETURN_TYPE_WARNINGS_BEGIN
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#endif
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namespace JSC { namespace B3 {
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enum Width : int8_t {
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Width8 = 0,
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Width16,
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Width32,
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Width64
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};
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constexpr Width pointerWidth()
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{
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if (sizeof(void*) == 8)
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return Width64;
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return Width32;
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}
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inline Width widthForType(Type type)
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{
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switch (type.kind()) {
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case Void:
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case Tuple:
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ASSERT_NOT_REACHED();
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return Width8;
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case Int32:
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case Float:
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return Width32;
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case Int64:
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case Double:
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return Width64;
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}
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ASSERT_NOT_REACHED();
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return Width8;
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}
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inline Width canonicalWidth(Width width)
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{
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return std::max(Width32, width);
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}
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inline bool isCanonicalWidth(Width width)
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{
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return width >= Width32;
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}
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Type bestType(Bank bank, Width width);
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inline Width conservativeWidth(Bank bank)
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{
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return bank == GP ? pointerWidth() : Width64;
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}
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inline Width minimumWidth(Bank bank)
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{
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return bank == GP ? Width8 : Width32;
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}
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inline unsigned bytes(Width width)
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{
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return 1 << width;
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}
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inline Width widthForBytes(unsigned bytes)
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{
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switch (bytes) {
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case 0:
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case 1:
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return Width8;
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case 2:
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return Width16;
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case 3:
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case 4:
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return Width32;
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default:
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return Width64;
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}
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}
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inline unsigned bytesForWidth(Width width)
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{
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switch (width) {
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case Width8:
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return 1;
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case Width16:
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return 2;
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case Width32:
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return 4;
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case Width64:
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return 8;
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}
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return 1;
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}
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inline uint64_t mask(Width width)
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{
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switch (width) {
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case Width8:
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return 0x00000000000000ffllu;
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case Width16:
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return 0x000000000000ffffllu;
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case Width32:
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return 0x00000000ffffffffllu;
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case Width64:
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return 0xffffffffffffffffllu;
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}
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ASSERT_NOT_REACHED();
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}
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} } // namespace JSC::B3
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namespace WTF {
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class PrintStream;
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void printInternal(PrintStream&, JSC::B3::Width);
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} // namespace WTF
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#if !ASSERT_ENABLED
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IGNORE_RETURN_TYPE_WARNINGS_END
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#endif
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#endif // ENABLE(B3_JIT)
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