1//===- X86DisassemblerShared.h - Emitter shared header ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef LLVM_UTILS_TABLEGEN_X86DISASSEMBLERSHARED_H 11#define LLVM_UTILS_TABLEGEN_X86DISASSEMBLERSHARED_H 12 13#include <cstring> 14#include <string> 15 16#include "../../lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h" 17 18struct InstructionSpecifier { 19 llvm::X86Disassembler::OperandSpecifier 20 operands[llvm::X86Disassembler::X86_MAX_OPERANDS]; 21 llvm::X86Disassembler::InstructionContext insnContext; 22 std::string name; 23 24 InstructionSpecifier() { 25 insnContext = llvm::X86Disassembler::IC; 26 name = ""; 27 memset(operands, 0, sizeof(operands)); 28 } 29}; 30 31/// Specifies whether a ModR/M byte is needed and (if so) which 32/// instruction each possible value of the ModR/M byte corresponds to. Once 33/// this information is known, we have narrowed down to a single instruction. 34struct ModRMDecision { 35 uint8_t modrm_type; 36 llvm::X86Disassembler::InstrUID instructionIDs[256]; 37}; 38 39/// Specifies which set of ModR/M->instruction tables to look at 40/// given a particular opcode. 41struct OpcodeDecision { 42 ModRMDecision modRMDecisions[256]; 43}; 44 45/// Specifies which opcode->instruction tables to look at given 46/// a particular context (set of attributes). Since there are many possible 47/// contexts, the decoder first uses CONTEXTS_SYM to determine which context 48/// applies given a specific set of attributes. Hence there are only IC_max 49/// entries in this table, rather than 2^(ATTR_max). 50struct ContextDecision { 51 OpcodeDecision opcodeDecisions[llvm::X86Disassembler::IC_max]; 52}; 53 54#endif 55