1/*
2 * Copyright (C) 2015-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(B3_JIT)
29
30#include "B3Value.h"
31#include "CCallHelpers.h"
32
33namespace JSC { namespace B3 {
34
35class WasmBoundsCheckValue : public Value {
36public:
37 static bool accepts(Kind kind) { return kind == WasmBoundsCheck; }
38
39 ~WasmBoundsCheckValue();
40
41 enum class Type {
42 Pinned,
43 Maximum,
44 };
45
46 union Bounds {
47 GPRReg pinnedSize;
48 size_t maximum;
49 };
50
51 unsigned offset() const { return m_offset; }
52 Type boundsType() const { return m_boundsType; }
53 Bounds bounds() const { return m_bounds; }
54
55 B3_SPECIALIZE_VALUE_FOR_FIXED_CHILDREN(1)
56 B3_SPECIALIZE_VALUE_FOR_FINAL_SIZE_FIXED_CHILDREN
57
58protected:
59 void dumpMeta(CommaPrinter&, PrintStream&) const override;
60
61private:
62 friend class Procedure;
63 friend class Value;
64
65 static Opcode opcodeFromConstructor(Origin, GPRReg, Value*, unsigned) { return WasmBoundsCheck; }
66 JS_EXPORT_PRIVATE WasmBoundsCheckValue(Origin, GPRReg pinnedGPR, Value* ptr, unsigned offset);
67
68 static Opcode opcodeFromConstructor(Origin, Value*, unsigned, size_t) { return WasmBoundsCheck; }
69 JS_EXPORT_PRIVATE WasmBoundsCheckValue(Origin, Value* ptr, unsigned offset, size_t maximum);
70
71 unsigned m_offset;
72 Type m_boundsType;
73 Bounds m_bounds;
74
75};
76
77} } // namespace JSC::B3
78
79#endif // ENABLE(B3_JIT)
80