146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen//=== MC/MCRegisterInfo.cpp - Target Register Description -------*- C++ -*-===// 246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// 346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// The LLVM Compiler Infrastructure 446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// 546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// This file is distributed under the University of Illinois Open Source 646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// License. See LICENSE.TXT for details. 746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// 846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 946c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// 1046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// This file implements MCRegisterInfo functions. 1146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen// 1246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 1346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 1446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen#include "llvm/MC/MCRegisterInfo.h" 1546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 1646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenusing namespace llvm; 1746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 1846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenunsigned MCRegisterInfo::getMatchingSuperReg(unsigned Reg, unsigned SubIdx, 1946c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const MCRegisterClass *RC) const { 2046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen for (MCSuperRegIterator Supers(Reg, this); Supers.isValid(); ++Supers) 2146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen if (RC->contains(*Supers) && Reg == getSubReg(*Supers, SubIdx)) 2246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return *Supers; 2346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return 0; 2446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 2546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 2646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenunsigned MCRegisterInfo::getSubReg(unsigned Reg, unsigned Idx) const { 2759f45e4610e64b88bcee4cd46816ef64e815ff7eJakob Stoklund Olesen assert(Idx && Idx < getNumSubRegIndices() && 2859f45e4610e64b88bcee4cd46816ef64e815ff7eJakob Stoklund Olesen "This is not a subregister index"); 2946c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen // Get a pointer to the corresponding SubRegIndices list. This list has the 3046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen // name of each sub-register in the same order as MCSubRegIterator. 3146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const uint16_t *SRI = SubRegIndices + get(Reg).SubRegIndices; 3246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen for (MCSubRegIterator Subs(Reg, this); Subs.isValid(); ++Subs, ++SRI) 3346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen if (*SRI == Idx) 3446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return *Subs; 3546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return 0; 3646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 3746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 3846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenunsigned MCRegisterInfo::getSubRegIndex(unsigned Reg, unsigned SubReg) const { 3959f45e4610e64b88bcee4cd46816ef64e815ff7eJakob Stoklund Olesen assert(SubReg && SubReg < getNumRegs() && "This is not a register"); 4046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen // Get a pointer to the corresponding SubRegIndices list. This list has the 4146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen // name of each sub-register in the same order as MCSubRegIterator. 4246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const uint16_t *SRI = SubRegIndices + get(Reg).SubRegIndices; 4346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen for (MCSubRegIterator Subs(Reg, this); Subs.isValid(); ++Subs, ++SRI) 4446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen if (*Subs == SubReg) 4546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return *SRI; 4646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return 0; 4746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 4846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 4923ed37a6b76e79272194fb46597f7280661b828fAhmed Bougachaunsigned MCRegisterInfo::getSubRegIdxSize(unsigned Idx) const { 50bed23081860275c79137f65d592920e7991b8198Ahmed Bougacha assert(Idx && Idx < getNumSubRegIndices() && 51bed23081860275c79137f65d592920e7991b8198Ahmed Bougacha "This is not a subregister index"); 5223ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha return SubRegIdxRanges[Idx].Size; 5323ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha} 5423ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha 5523ed37a6b76e79272194fb46597f7280661b828fAhmed Bougachaunsigned MCRegisterInfo::getSubRegIdxOffset(unsigned Idx) const { 5623ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha assert(Idx && Idx < getNumSubRegIndices() && 5723ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha "This is not a subregister index"); 5823ed37a6b76e79272194fb46597f7280661b828fAhmed Bougacha return SubRegIdxRanges[Idx].Offset; 59bed23081860275c79137f65d592920e7991b8198Ahmed Bougacha} 60bed23081860275c79137f65d592920e7991b8198Ahmed Bougacha 6146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenint MCRegisterInfo::getDwarfRegNum(unsigned RegNum, bool isEH) const { 6246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const DwarfLLVMRegPair *M = isEH ? EHL2DwarfRegs : L2DwarfRegs; 6346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen unsigned Size = isEH ? EHL2DwarfRegsSize : L2DwarfRegsSize; 6446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 6546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen DwarfLLVMRegPair Key = { RegNum, 0 }; 6646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const DwarfLLVMRegPair *I = std::lower_bound(M, M+Size, Key); 6746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen if (I == M+Size || I->FromReg != RegNum) 6846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return -1; 6946c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return I->ToReg; 7046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 7146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 7246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenint MCRegisterInfo::getLLVMRegNum(unsigned RegNum, bool isEH) const { 7346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const DwarfLLVMRegPair *M = isEH ? EHDwarf2LRegs : Dwarf2LRegs; 7446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen unsigned Size = isEH ? EHDwarf2LRegsSize : Dwarf2LRegsSize; 7546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 7646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen DwarfLLVMRegPair Key = { RegNum, 0 }; 7746c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const DwarfLLVMRegPair *I = std::lower_bound(M, M+Size, Key); 7846c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen assert(I != M+Size && I->FromReg == RegNum && "Invalid RegNum"); 7946c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return I->ToReg; 8046c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 8146c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen 8246c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesenint MCRegisterInfo::getSEHRegNum(unsigned RegNum) const { 8346c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen const DenseMap<unsigned, int>::const_iterator I = L2SEHRegs.find(RegNum); 8446c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen if (I == L2SEHRegs.end()) return (int)RegNum; 8546c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen return I->second; 8646c0dc7858da65707340ca62b258f8956def78e8Jakob Stoklund Olesen} 87