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gerrit-public.fairphone.software / fp2-dev / platform / external / v8 / 4a90d5fbbb6802c59093b866f3478a814bf02b95 / . / src / wasm / wasm-opcodes.cc
blob: 25eef034d7f3e7b86d6d9c78d52b14fdc83c38c9 [file] [log] [blame]
Ben Murdoch4a90d5f2016-03-22 12:00:34 +0000[diff] [blame^]1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "src/wasm/wasm-opcodes.h"
6#include "src/signature.h"
7
8namespace v8 {
9namespace internal {
10namespace wasm {
11
12typedef Signature<LocalType> FunctionSig;
13
14const char* WasmOpcodes::OpcodeName(WasmOpcode opcode) {
15 switch (opcode) {
16#define DECLARE_NAME_CASE(name, opcode, sig) \
17 case kExpr##name: \
18 return "Expr" #name;
19 FOREACH_OPCODE(DECLARE_NAME_CASE)
20#undef DECLARE_NAME_CASE
21 default:
22 break;
23 }
24 return "Unknown";
25}
26
27
28#define DECLARE_SIG_ENUM(name, ...) kSigEnum_##name,
29
30
31enum WasmOpcodeSig { FOREACH_SIGNATURE(DECLARE_SIG_ENUM) };
32
33
34// TODO(titzer): not static-initializer safe. Wrap in LazyInstance.
35#define DECLARE_SIG(name, ...) \
36 static LocalType kTypes_##name[] = {__VA_ARGS__}; \
37 static const FunctionSig kSig_##name( \
38 1, static_cast<int>(arraysize(kTypes_##name)) - 1, kTypes_##name);
39
40FOREACH_SIGNATURE(DECLARE_SIG)
41
42#define DECLARE_SIG_ENTRY(name, ...) &kSig_##name,
43
44static const FunctionSig* kSimpleExprSigs[] = {
45 nullptr, FOREACH_SIGNATURE(DECLARE_SIG_ENTRY)};
46
47static byte kSimpleExprSigTable[256];
48
49
50// Initialize the signature table.
51static void InitSigTable() {
52#define SET_SIG_TABLE(name, opcode, sig) \
53 kSimpleExprSigTable[opcode] = static_cast<int>(kSigEnum_##sig) + 1;
54 FOREACH_SIMPLE_OPCODE(SET_SIG_TABLE);
55#undef SET_SIG_TABLE
56}
57
58
59FunctionSig* WasmOpcodes::Signature(WasmOpcode opcode) {
60 // TODO(titzer): use LazyInstance to make this thread safe.
61 if (kSimpleExprSigTable[kExprI32Add] == 0) InitSigTable();
62 return const_cast<FunctionSig*>(
63 kSimpleExprSigs[kSimpleExprSigTable[static_cast<byte>(opcode)]]);
64}
65
66
67// TODO(titzer): pull WASM_64 up to a common header.
68#if !V8_TARGET_ARCH_32_BIT || V8_TARGET_ARCH_X64
69#define WASM_64 1
70#else
71#define WASM_64 0
72#endif
73
74
75bool WasmOpcodes::IsSupported(WasmOpcode opcode) {
76#if !WASM_64
77 switch (opcode) {
78 // Opcodes not supported on 32-bit platforms.
79 case kExprI64Add:
80 case kExprI64Sub:
81 case kExprI64Mul:
82 case kExprI64DivS:
83 case kExprI64DivU:
84 case kExprI64RemS:
85 case kExprI64RemU:
86 case kExprI64And:
87 case kExprI64Ior:
88 case kExprI64Xor:
89 case kExprI64Shl:
90 case kExprI64ShrU:
91 case kExprI64ShrS:
92 case kExprI64Eq:
93 case kExprI64Ne:
94 case kExprI64LtS:
95 case kExprI64LeS:
96 case kExprI64LtU:
97 case kExprI64LeU:
98 case kExprI64GtS:
99 case kExprI64GeS:
100 case kExprI64GtU:
101 case kExprI64GeU:
102
103 case kExprI32ConvertI64:
104 case kExprI64SConvertI32:
105 case kExprI64UConvertI32:
106
107 case kExprF64ReinterpretI64:
108 case kExprI64ReinterpretF64:
109
110 case kExprI64Clz:
111 case kExprI64Ctz:
112 case kExprI64Popcnt:
113
114 case kExprF32SConvertI64:
115 case kExprF32UConvertI64:
116 case kExprF64SConvertI64:
117 case kExprF64UConvertI64:
118 case kExprI64SConvertF32:
119 case kExprI64SConvertF64:
120 case kExprI64UConvertF32:
121 case kExprI64UConvertF64:
122
123 return false;
124 default:
125 return true;
126 }
127#else
128 return true;
129#endif
130}
131} // namespace wasm
132} // namespace internal
133} // namespace v8