X86DisassemblerShared.h revision 276479
1201360Srdivacky//===- X86DisassemblerShared.h - Emitter shared header ----------*- C++ -*-===// 2201360Srdivacky// 3201360Srdivacky// The LLVM Compiler Infrastructure 4201360Srdivacky// 5201360Srdivacky// This file is distributed under the University of Illinois Open Source 6201360Srdivacky// License. See LICENSE.TXT for details. 7201360Srdivacky// 8201360Srdivacky//===----------------------------------------------------------------------===// 9201360Srdivacky 10201360Srdivacky#ifndef X86DISASSEMBLERSHARED_H 11201360Srdivacky#define X86DISASSEMBLERSHARED_H 12201360Srdivacky 13249423Sdim#include <string.h> 14201360Srdivacky#include <string> 15201360Srdivacky 16276479Sdim#include "../../lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h" 17276479Sdim 18276479Sdimstruct InstructionSpecifier { 19276479Sdim llvm::X86Disassembler::OperandSpecifier 20276479Sdim operands[llvm::X86Disassembler::X86_MAX_OPERANDS]; 21276479Sdim llvm::X86Disassembler::InstructionContext insnContext; 22276479Sdim std::string name; 23276479Sdim 24276479Sdim InstructionSpecifier() { 25276479Sdim insnContext = llvm::X86Disassembler::IC; 26276479Sdim name = ""; 27276479Sdim memset(operands, 0, sizeof(operands)); 28201360Srdivacky } 29276479Sdim}; 30201360Srdivacky 31276479Sdim/// Specifies whether a ModR/M byte is needed and (if so) which 32276479Sdim/// instruction each possible value of the ModR/M byte corresponds to. Once 33276479Sdim/// this information is known, we have narrowed down to a single instruction. 34276479Sdimstruct ModRMDecision { 35276479Sdim uint8_t modrm_type; 36276479Sdim llvm::X86Disassembler::InstrUID instructionIDs[256]; 37276479Sdim}; 38201360Srdivacky 39276479Sdim/// Specifies which set of ModR/M->instruction tables to look at 40276479Sdim/// given a particular opcode. 41276479Sdimstruct OpcodeDecision { 42276479Sdim ModRMDecision modRMDecisions[256]; 43276479Sdim}; 44201360Srdivacky 45276479Sdim/// Specifies which opcode->instruction tables to look at given 46276479Sdim/// a particular context (set of attributes). Since there are many possible 47276479Sdim/// contexts, the decoder first uses CONTEXTS_SYM to determine which context 48276479Sdim/// applies given a specific set of attributes. Hence there are only IC_max 49276479Sdim/// entries in this table, rather than 2^(ATTR_max). 50276479Sdimstruct ContextDecision { 51276479Sdim OpcodeDecision opcodeDecisions[llvm::X86Disassembler::IC_max]; 52276479Sdim}; 53201360Srdivacky 54201360Srdivacky#endif 55