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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/wasm/wasm-opcodes.h"
#include "src/messages.h"
#include "src/signature.h"
namespace v8 {
namespace internal {
namespace wasm {
typedef Signature<LocalType> FunctionSig;
const char* WasmOpcodes::OpcodeName(WasmOpcode opcode) {
switch (opcode) {
#define DECLARE_NAME_CASE(name, opcode, sig) \
case kExpr##name: \
return "Expr" #name;
FOREACH_OPCODE(DECLARE_NAME_CASE)
#undef DECLARE_NAME_CASE
default:
break;
}
return "Unknown";
}
const char* WasmOpcodes::ShortOpcodeName(WasmOpcode opcode) {
switch (opcode) {
#define DECLARE_NAME_CASE(name, opcode, sig) \
case kExpr##name: \
return #name;
FOREACH_OPCODE(DECLARE_NAME_CASE)
#undef DECLARE_NAME_CASE
default:
break;
}
return "Unknown";
}
bool WasmOpcodes::IsPrefixOpcode(WasmOpcode opcode) {
switch (opcode) {
#define CHECK_PREFIX(name, opcode) \
case k##name##Prefix: \
return true;
FOREACH_PREFIX(CHECK_PREFIX)
#undef CHECK_PREFIX
default:
return false;
}
}
std::ostream& operator<<(std::ostream& os, const FunctionSig& sig) {
if (sig.return_count() == 0) os << "v";
for (size_t i = 0; i < sig.return_count(); ++i) {
os << WasmOpcodes::ShortNameOf(sig.GetReturn(i));
}
os << "_";
if (sig.parameter_count() == 0) os << "v";
for (size_t i = 0; i < sig.parameter_count(); ++i) {
os << WasmOpcodes::ShortNameOf(sig.GetParam(i));
}
return os;
}
#define DECLARE_SIG_ENUM(name, ...) kSigEnum_##name,
enum WasmOpcodeSig { FOREACH_SIGNATURE(DECLARE_SIG_ENUM) };
// TODO(titzer): not static-initializer safe. Wrap in LazyInstance.
#define DECLARE_SIG(name, ...) \
static LocalType kTypes_##name[] = {__VA_ARGS__}; \
static const FunctionSig kSig_##name( \
1, static_cast<int>(arraysize(kTypes_##name)) - 1, kTypes_##name);
FOREACH_SIGNATURE(DECLARE_SIG)
#define DECLARE_SIG_ENTRY(name, ...) &kSig_##name,
static const FunctionSig* kSimpleExprSigs[] = {
nullptr, FOREACH_SIGNATURE(DECLARE_SIG_ENTRY)};
#define DECLARE_SIMD_SIG_ENTRY(name, ...) &kSig_##name,
static const FunctionSig* kSimdExprSigs[] = {
nullptr, FOREACH_SIMD_SIGNATURE(DECLARE_SIMD_SIG_ENTRY)};
static byte kSimpleExprSigTable[256];
static byte kSimpleAsmjsExprSigTable[256];
static byte kSimdExprSigTable[256];
static byte kAtomicExprSigTable[256];
// Initialize the signature table.
static void InitSigTables() {
#define SET_SIG_TABLE(name, opcode, sig) \
kSimpleExprSigTable[opcode] = static_cast<int>(kSigEnum_##sig) + 1;
FOREACH_SIMPLE_OPCODE(SET_SIG_TABLE);
#undef SET_SIG_TABLE
#define SET_ASMJS_SIG_TABLE(name, opcode, sig) \
kSimpleAsmjsExprSigTable[opcode] = static_cast<int>(kSigEnum_##sig) + 1;
FOREACH_ASMJS_COMPAT_OPCODE(SET_ASMJS_SIG_TABLE);
#undef SET_ASMJS_SIG_TABLE
byte simd_index;
#define SET_SIG_TABLE(name, opcode, sig) \
simd_index = opcode & 0xff; \
kSimdExprSigTable[simd_index] = static_cast<int>(kSigEnum_##sig) + 1;
FOREACH_SIMD_0_OPERAND_OPCODE(SET_SIG_TABLE)
#undef SET_SIG_TABLE
byte atomic_index;
#define SET_ATOMIC_SIG_TABLE(name, opcode, sig) \
atomic_index = opcode & 0xff; \
kAtomicExprSigTable[atomic_index] = static_cast<int>(kSigEnum_##sig) + 1;
FOREACH_ATOMIC_OPCODE(SET_ATOMIC_SIG_TABLE)
#undef SET_ATOMIC_SIG_TABLE
}
class SigTable {
public:
SigTable() {
// TODO(ahaas): Move {InitSigTable} into the class.
InitSigTables();
}
FunctionSig* Signature(WasmOpcode opcode) const {
return const_cast<FunctionSig*>(
kSimpleExprSigs[kSimpleExprSigTable[static_cast<byte>(opcode)]]);
}
FunctionSig* AsmjsSignature(WasmOpcode opcode) const {
return const_cast<FunctionSig*>(
kSimpleExprSigs[kSimpleAsmjsExprSigTable[static_cast<byte>(opcode)]]);
}
FunctionSig* SimdSignature(WasmOpcode opcode) const {
return const_cast<FunctionSig*>(
kSimdExprSigs[kSimdExprSigTable[static_cast<byte>(opcode & 0xff)]]);
}
FunctionSig* AtomicSignature(WasmOpcode opcode) const {
return const_cast<FunctionSig*>(
kSimpleExprSigs[kAtomicExprSigTable[static_cast<byte>(opcode & 0xff)]]);
}
};
static base::LazyInstance<SigTable>::type sig_table = LAZY_INSTANCE_INITIALIZER;
FunctionSig* WasmOpcodes::Signature(WasmOpcode opcode) {
if (opcode >> 8 == kSimdPrefix) {
return sig_table.Get().SimdSignature(opcode);
} else {
return sig_table.Get().Signature(opcode);
}
}
FunctionSig* WasmOpcodes::AsmjsSignature(WasmOpcode opcode) {
return sig_table.Get().AsmjsSignature(opcode);
}
FunctionSig* WasmOpcodes::AtomicSignature(WasmOpcode opcode) {
return sig_table.Get().AtomicSignature(opcode);
}
// TODO(titzer): pull WASM_64 up to a common header.
#if !V8_TARGET_ARCH_32_BIT || V8_TARGET_ARCH_X64
#define WASM_64 1
#else
#define WASM_64 0
#endif
int WasmOpcodes::TrapReasonToMessageId(TrapReason reason) {
switch (reason) {
#define TRAPREASON_TO_MESSAGE(name) \
case k##name: \
return MessageTemplate::kWasm##name;
FOREACH_WASM_TRAPREASON(TRAPREASON_TO_MESSAGE)
#undef TRAPREASON_TO_MESSAGE
default:
return MessageTemplate::kNone;
}
}
const char* WasmOpcodes::TrapReasonMessage(TrapReason reason) {
return MessageTemplate::TemplateString(TrapReasonToMessageId(reason));
}
} // namespace wasm
} // namespace internal
} // namespace v8
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