// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/snapshot/builtin-snapshot-utils.h"
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namespace v8 {
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namespace internal {
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// static
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bool BuiltinSnapshotUtils::IsBuiltinIndex(int maybe_index) {
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return (kFirstBuiltinIndex <= maybe_index &&
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maybe_index < kFirstBuiltinIndex + kNumberOfBuiltins);
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}
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// static
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bool BuiltinSnapshotUtils::IsHandlerIndex(int maybe_index) {
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return (kFirstHandlerIndex <= maybe_index &&
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maybe_index < kFirstHandlerIndex + kNumberOfHandlers);
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}
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// static
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int BuiltinSnapshotUtils::BytecodeToIndex(Bytecode bytecode,
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OperandScale operand_scale) {
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int index =
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BuiltinSnapshotUtils::kNumberOfBuiltins + static_cast<int>(bytecode);
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switch (operand_scale) { // clang-format off
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case OperandScale::kSingle: return index;
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case OperandScale::kDouble: return index + Bytecodes::kBytecodeCount;
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case OperandScale::kQuadruple: return index + 2 * Bytecodes::kBytecodeCount;
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} // clang-format on
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UNREACHABLE();
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}
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// static
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std::pair<interpreter::Bytecode, interpreter::OperandScale>
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BuiltinSnapshotUtils::BytecodeFromIndex(int index) {
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DCHECK(IsHandlerIndex(index));
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const int x = index - BuiltinSnapshotUtils::kNumberOfBuiltins;
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Bytecode bytecode = Bytecodes::FromByte(x % Bytecodes::kBytecodeCount);
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switch (x / Bytecodes::kBytecodeCount) { // clang-format off
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case 0: return {bytecode, OperandScale::kSingle};
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case 1: return {bytecode, OperandScale::kDouble};
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case 2: return {bytecode, OperandScale::kQuadruple};
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default: UNREACHABLE();
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} // clang-format on
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}
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// static
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void BuiltinSnapshotUtils::ForEachBytecode(
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std::function<void(Bytecode, OperandScale)> f) {
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static const OperandScale kOperandScales[] = {
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#define VALUE(Name, _) OperandScale::k##Name,
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OPERAND_SCALE_LIST(VALUE)
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#undef VALUE
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};
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for (OperandScale operand_scale : kOperandScales) {
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for (int i = 0; i < Bytecodes::kBytecodeCount; i++) {
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f(Bytecodes::FromByte(i), operand_scale);
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}
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}
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}
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} // namespace internal
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} // namespace v8
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