1 //===-- MipsSubtarget.cpp - Mips Subtarget Information --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Mips specific subclass of TargetSubtargetInfo.
12 //===----------------------------------------------------------------------===//
14 #include "MipsSubtarget.h"
16 #include "MipsRegisterInfo.h"
17 #include "llvm/Support/TargetRegistry.h"
19 #define GET_SUBTARGETINFO_TARGET_DESC
20 #define GET_SUBTARGETINFO_CTOR
21 #include "MipsGenSubtargetInfo.inc"
25 void MipsSubtarget::anchor() { }
27 MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
28 const std::string &FS, bool little) :
29 MipsGenSubtargetInfo(TT, CPU, FS),
30 MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
31 IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
32 IsLinux(true), HasSEInReg(false), HasCondMov(false), HasMulDivAdd(false),
33 HasMinMax(false), HasSwap(false), HasBitCount(false), InMips16Mode(false)
35 std::string CPUName = CPU;
39 // Parse features string.
40 ParseSubtargetFeatures(CPUName, FS);
42 // Initialize scheduling itinerary for the specified CPU.
43 InstrItins = getInstrItineraryForCPU(CPUName);
45 // Set MipsABI if it hasn't been set yet.
46 if (MipsABI == UnknownABI)
47 MipsABI = hasMips64() ? N64 : O32;
49 // Check if Architecture and ABI are compatible.
50 assert(((!hasMips64() && (isABI_O32() || isABI_EABI())) ||
51 (hasMips64() && (isABI_N32() || isABI_N64()))) &&
52 "Invalid Arch & ABI pair.");
54 // Is the target system Linux ?
55 if (TT.find("linux") == std::string::npos)
60 MipsSubtarget::enablePostRAScheduler(CodeGenOpt::Level OptLevel,
61 TargetSubtargetInfo::AntiDepBreakMode &Mode,
62 RegClassVector &CriticalPathRCs) const {
63 Mode = TargetSubtargetInfo::ANTIDEP_NONE;
64 CriticalPathRCs.clear();
65 CriticalPathRCs.push_back(hasMips64() ?
66 &Mips::CPU64RegsRegClass : &Mips::CPURegsRegClass);
67 return OptLevel >= CodeGenOpt::Aggressive;