18ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan//===- X86DisassemblerShared.h - Emitter shared header ----------*- C++ -*-===// 28ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// 38ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// The LLVM Compiler Infrastructure 48ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// 58ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// This file is distributed under the University of Illinois Open Source 68ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// License. See LICENSE.TXT for details. 78ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan// 88ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan//===----------------------------------------------------------------------===// 98ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 1037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines#ifndef LLVM_UTILS_TABLEGEN_X86DISASSEMBLERSHARED_H 1137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines#define LLVM_UTILS_TABLEGEN_X86DISASSEMBLERSHARED_H 128ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 132c3e0051c31c3f5b2328b447eadf1cf9c4427442Pirama Arumuga Nainar#include <cstring> 144ffd89fa4d2788611187d1a534d2ed46adf1702cChandler Carruth#include <string> 158ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 16dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "../../lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h" 17dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 18dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct InstructionSpecifier { 19dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines llvm::X86Disassembler::OperandSpecifier 20dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines operands[llvm::X86Disassembler::X86_MAX_OPERANDS]; 21dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines llvm::X86Disassembler::InstructionContext insnContext; 22dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines std::string name; 23dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 24dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines InstructionSpecifier() { 25dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines insnContext = llvm::X86Disassembler::IC; 26dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines name = ""; 27dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines memset(operands, 0, sizeof(operands)); 288ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan } 29dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}; 308ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 31dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Specifies whether a ModR/M byte is needed and (if so) which 32dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// instruction each possible value of the ModR/M byte corresponds to. Once 33dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// this information is known, we have narrowed down to a single instruction. 34dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct ModRMDecision { 35dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines uint8_t modrm_type; 36dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines llvm::X86Disassembler::InstrUID instructionIDs[256]; 37dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}; 388ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 39dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Specifies which set of ModR/M->instruction tables to look at 40dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// given a particular opcode. 41dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct OpcodeDecision { 42dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines ModRMDecision modRMDecisions[256]; 43dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}; 448ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 45dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Specifies which opcode->instruction tables to look at given 46dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// a particular context (set of attributes). Since there are many possible 47dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// contexts, the decoder first uses CONTEXTS_SYM to determine which context 48dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// applies given a specific set of attributes. Hence there are only IC_max 49dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// entries in this table, rather than 2^(ATTR_max). 50dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct ContextDecision { 51dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines OpcodeDecision opcodeDecisions[llvm::X86Disassembler::IC_max]; 52dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}; 538ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan 548ed9f51663bc5533f36ca62e5668ae08e9a1313fSean Callanan#endif 55