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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_UTILS_TABLEGEN_DECODERTABLEEMITTER_H
#define LLVM_UTILS_TABLEGEN_DECODERTABLEEMITTER_H
#include "DecoderTree.h"
#include "llvm/Support/FormattedStream.h"
namespace llvm {
struct DecoderTableInfo {
bool HasCheckPredicate = false;
bool HasSoftFail = false;
};
class DecoderTableEmitter {
DecoderTableInfo &TableInfo;
formatted_raw_ostream OS;
/// The number of positions occupied by the index in the output. Used to
/// right-align indices and left-align the text that follows them.
unsigned IndexWidth;
/// The current position in the output stream. After the table is emitted,
/// this is its size.
unsigned CurrentIndex;
/// The index of the first byte of the table row. Used as a label in the
/// comment following the row.
unsigned LineStartIndex;
public:
DecoderTableEmitter(DecoderTableInfo &TableInfo, raw_ostream &OS)
: TableInfo(TableInfo), OS(OS) {}
void emitTable(StringRef TableName, unsigned BitWidth,
const DecoderTreeNode *Root);
private:
unsigned computeNodeSize(const DecoderTreeNode *Node) const;
unsigned computeTableSize(const DecoderTreeNode *Root,
unsigned BitWidth) const;
void emitStartLine();
void emitOpcode(StringRef Name);
void emitByte(uint8_t Val);
void emitUInt8(unsigned Val);
void emitULEB128(uint64_t Val);
raw_ostream &emitComment(indent Indent);
void emitCheckAnyNode(const CheckAnyNode *N, indent Indent);
void emitCheckAllNode(const CheckAllNode *N, indent Indent);
void emitSwitchFieldNode(const SwitchFieldNode *N, indent Indent);
void emitCheckFieldNode(const CheckFieldNode *N, indent Indent);
void emitCheckPredicateNode(const CheckPredicateNode *N, indent Indent);
void emitSoftFailNode(const SoftFailNode *N, indent Indent);
void emitDecodeNode(const DecodeNode *N, indent Indent);
void emitNode(const DecoderTreeNode *N, indent Indent);
};
} // namespace llvm
#endif // LLVM_UTILS_TABLEGEN_DECODERTABLEEMITTER_H
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