| //===- X86DisassemblerShared.h - Emitter shared header ----------*- C++ -*-===// |
| // |
| // 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_X86DISASSEMBLERSHARED_H |
| #define LLVM_UTILS_TABLEGEN_X86DISASSEMBLERSHARED_H |
| |
| #include <cstring> |
| #include <string> |
| |
| #include "llvm/Support/X86DisassemblerDecoderCommon.h" |
| |
| struct InstructionSpecifier { |
| llvm::X86Disassembler::OperandSpecifier |
| operands[llvm::X86Disassembler::X86_MAX_OPERANDS]; |
| llvm::X86Disassembler::InstructionContext insnContext; |
| std::string name; |
| |
| InstructionSpecifier() { |
| insnContext = llvm::X86Disassembler::IC; |
| name = ""; |
| memset(operands, 0, sizeof(operands)); |
| } |
| }; |
| |
| /// Specifies whether a ModR/M byte is needed and (if so) which |
| /// instruction each possible value of the ModR/M byte corresponds to. Once |
| /// this information is known, we have narrowed down to a single instruction. |
| struct ModRMDecision { |
| uint8_t modrm_type; |
| llvm::X86Disassembler::InstrUID instructionIDs[256]; |
| }; |
| |
| /// Specifies which set of ModR/M->instruction tables to look at |
| /// given a particular opcode. |
| struct OpcodeDecision { |
| ModRMDecision modRMDecisions[256]; |
| }; |
| |
| /// Specifies which opcode->instruction tables to look at given |
| /// a particular context (set of attributes). Since there are many possible |
| /// contexts, the decoder first uses CONTEXTS_SYM to determine which context |
| /// applies given a specific set of attributes. Hence there are only IC_max |
| /// entries in this table, rather than 2^(ATTR_max). |
| struct ContextDecision { |
| OpcodeDecision opcodeDecisions[llvm::X86Disassembler::IC_max]; |
| |
| ContextDecision() { |
| memset(opcodeDecisions, 0, sizeof(opcodeDecisions)); |
| } |
| }; |
| |
| #endif |