MipsSubtarget.h revision 224145 
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
29public:
30  enum MipsABIEnum {
31    O32, O64, N32, N64, EABI
32  };
33
34protected:
35
36  enum MipsArchEnum {
37    Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2
38  };
39
40  // Mips architecture version
41  MipsArchEnum MipsArchVersion;
42
43  // Mips supported ABIs
44  MipsABIEnum MipsABI;
45
46  // IsLittle - The target is Little Endian
47  bool IsLittle;
48
49  // IsSingleFloat - The target only supports single precision float
50  // point operations. This enable the target to use all 32 32-bit
51  // floating point registers instead of only using even ones.
52  bool IsSingleFloat;
53
54  // IsFP64bit - The target processor has 64-bit floating point registers.
55  bool IsFP64bit;
56
57  // IsFP64bit - General-purpose registers are 64 bits wide
58  bool IsGP64bit;
59
60  // HasVFPU - Processor has a vector floating point unit.
61  bool HasVFPU;
62
63  // isLinux - Target system is Linux. Is false we consider ELFOS for now.
64  bool IsLinux;
65
66  /// Features related to the presence of specific instructions.
67
68  // HasSEInReg - SEB and SEH (signext in register) instructions.
69  bool HasSEInReg;
70
71  // HasCondMov - Conditional mov (MOVZ, MOVN) instructions.
72  bool HasCondMov;
73
74  // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu)
75  // instructions.
76  bool HasMulDivAdd;
77
78  // HasMinMax - MIN and MAX instructions.
79  bool HasMinMax;
80
81  // HasSwap - Byte and half swap instructions.
82  bool HasSwap;
83
84  // HasBitCount - Count leading '1' and '0' bits.
85  bool HasBitCount;
86
87  InstrItineraryData InstrItins;
88
89public:
90
91  /// Only O32 and EABI supported right now.
92  bool isABI_EABI() const { return MipsABI == EABI; }
93  bool isABI_O32() const { return MipsABI == O32; }
94  unsigned getTargetABI() const { return MipsABI; }
95
96  /// This constructor initializes the data members to match that
97  /// of the specified triple.
98  MipsSubtarget(const std::string &TT, const std::string &CPU,
99                const std::string &FS, bool little);
100
101  /// ParseSubtargetFeatures - Parses features string setting specified
102  /// subtarget options.  Definition of function is auto generated by tblgen.
103  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
104
105  bool isMips1() const { return MipsArchVersion == Mips1; }
106  bool isMips32() const { return MipsArchVersion >= Mips32; }
107  bool isMips32r2() const { return MipsArchVersion == Mips32r2; }
108
109  bool isLittle() const { return IsLittle; }
110  bool isFP64bit() const { return IsFP64bit; }
111  bool isGP64bit() const { return IsGP64bit; }
112  bool isGP32bit() const { return !IsGP64bit; }
113  bool isSingleFloat() const { return IsSingleFloat; }
114  bool isNotSingleFloat() const { return !IsSingleFloat; }
115  bool hasVFPU() const { return HasVFPU; }
116  bool isLinux() const { return IsLinux; }
117
118  /// Features related to the presence of specific instructions.
119  bool hasSEInReg()   const { return HasSEInReg; }
120  bool hasCondMov()   const { return HasCondMov; }
121  bool hasMulDivAdd() const { return HasMulDivAdd; }
122  bool hasMinMax()    const { return HasMinMax; }
123  bool hasSwap()      const { return HasSwap; }
124  bool hasBitCount()  const { return HasBitCount; }
125};
126} // End llvm namespace
127
128#endif
129