MipsSubtarget.h revision bb2e1b581ada0b748d6626512094c9500544f600 
1//===-- MipsSubtarget.h - Define Subtarget for the Mips ---------*- 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// This file declares the Mips specific subclass of TargetSubtargetInfo.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSSUBTARGET_H
15#define MIPSSUBTARGET_H
16
17#include "llvm/Target/TargetSubtargetInfo.h"
18#include "llvm/MC/MCInstrItineraries.h"
19#include <string>
20
21#define GET_SUBTARGETINFO_HEADER
22#include "MipsGenSubtargetInfo.inc"
23
24namespace llvm {
25class StringRef;
26
27class MipsSubtarget : public MipsGenSubtargetInfo {
28  virtual void anchor();
29
30public:
31  // NOTE: O64 will not be supported.
32  enum MipsABIEnum {
33    UnknownABI, O32, N32, N64, EABI
34  };
35
36protected:
37
38  enum MipsArchEnum {
39    Mips32, Mips32r2, Mips64, Mips64r2
40  };
41
42  // Mips architecture version
43  MipsArchEnum MipsArchVersion;
44
45  // Mips supported ABIs
46  MipsABIEnum MipsABI;
47
48  // IsLittle - The target is Little Endian
49  bool IsLittle;
50
51  // IsSingleFloat - The target only supports single precision float
52  // point operations. This enable the target to use all 32 32-bit
53  // floating point registers instead of only using even ones.
54  bool IsSingleFloat;
55
56  // IsFP64bit - The target processor has 64-bit floating point registers.
57  bool IsFP64bit;
58
59  // IsFP64bit - General-purpose registers are 64 bits wide
60  bool IsGP64bit;
61
62  // HasVFPU - Processor has a vector floating point unit.
63  bool HasVFPU;
64
65  // isLinux - Target system is Linux. Is false we consider ELFOS for now.
66  bool IsLinux;
67
68  /// Features related to the presence of specific instructions.
69
70  // HasSEInReg - SEB and SEH (signext in register) instructions.
71  bool HasSEInReg;
72
73  // HasCondMov - Conditional mov (MOVZ, MOVN) instructions.
74  bool HasCondMov;
75
76  // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu)
77  // instructions.
78  bool HasMulDivAdd;
79
80  // HasMinMax - MIN and MAX instructions.
81  bool HasMinMax;
82
83  // HasSwap - Byte and half swap instructions.
84  bool HasSwap;
85
86  // HasBitCount - Count leading '1' and '0' bits.
87  bool HasBitCount;
88
89  // InMips16 -- can process Mips16 instructions
90  bool InMips16Mode;
91
92  // IsAndroid -- target is android
93  bool IsAndroid;
94
95  InstrItineraryData InstrItins;
96
97public:
98  virtual bool enablePostRAScheduler(CodeGenOpt::Level OptLevel,
99                                     AntiDepBreakMode& Mode,
100                                     RegClassVector& CriticalPathRCs) const;
101
102  /// Only O32 and EABI supported right now.
103  bool isABI_EABI() const { return MipsABI == EABI; }
104  bool isABI_N64() const { return MipsABI == N64; }
105  bool isABI_N32() const { return MipsABI == N32; }
106  bool isABI_O32() const { return MipsABI == O32; }
107  unsigned getTargetABI() const { return MipsABI; }
108
109  /// This constructor initializes the data members to match that
110  /// of the specified triple.
111  MipsSubtarget(const std::string &TT, const std::string &CPU,
112                const std::string &FS, bool little);
113
114  /// ParseSubtargetFeatures - Parses features string setting specified
115  /// subtarget options.  Definition of function is auto generated by tblgen.
116  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
117
118  bool hasMips32() const { return MipsArchVersion >= Mips32; }
119  bool hasMips32r2() const { return MipsArchVersion == Mips32r2 ||
120                                   MipsArchVersion == Mips64r2; }
121  bool hasMips64() const { return MipsArchVersion >= Mips64; }
122  bool hasMips64r2() const { return MipsArchVersion == Mips64r2; }
123
124  bool hasMips32r2Or64() const { return hasMips32r2() || hasMips64(); }
125
126  bool isLittle() const { return IsLittle; }
127  bool isFP64bit() const { return IsFP64bit; }
128  bool isGP64bit() const { return IsGP64bit; }
129  bool isGP32bit() const { return !IsGP64bit; }
130  bool isSingleFloat() const { return IsSingleFloat; }
131  bool isNotSingleFloat() const { return !IsSingleFloat; }
132  bool hasVFPU() const { return HasVFPU; }
133  bool inMips16Mode() const { return InMips16Mode; }
134  bool isAndroid() const { return IsAndroid; }
135  bool isLinux() const { return IsLinux; }
136
137  bool hasStandardEncoding() const { return !inMips16Mode(); }
138
139  /// Features related to the presence of specific instructions.
140  bool hasSEInReg()   const { return HasSEInReg; }
141  bool hasCondMov()   const { return HasCondMov; }
142  bool hasMulDivAdd() const { return HasMulDivAdd; }
143  bool hasMinMax()    const { return HasMinMax; }
144  bool hasSwap()      const { return HasSwap; }
145  bool hasBitCount()  const { return HasBitCount; }
146};
147} // End llvm namespace
148
149#endif
150