MipsSubtarget.h revision 218893 
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 TargetSubtarget.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSSUBTARGET_H
15#define MIPSSUBTARGET_H
16
17#include "llvm/Target/TargetSubtarget.h"
18#include "llvm/Target/TargetMachine.h"
19
20#include <string>
21
22namespace llvm {
23
24class MipsSubtarget : public TargetSubtarget {
25
26public:
27  enum MipsABIEnum {
28    O32, O64, N32, N64, EABI
29  };
30
31protected:
32
33  enum MipsArchEnum {
34    Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2
35  };
36
37  // Mips architecture version
38  MipsArchEnum MipsArchVersion;
39
40  // Mips supported ABIs
41  MipsABIEnum MipsABI;
42
43  // IsLittle - The target is Little Endian
44  bool IsLittle;
45
46  // IsSingleFloat - The target only supports single precision float
47  // point operations. This enable the target to use all 32 32-bit
48  // floating point registers instead of only using even ones.
49  bool IsSingleFloat;
50
51  // IsFP64bit - The target processor has 64-bit floating point registers.
52  bool IsFP64bit;
53
54  // IsFP64bit - General-purpose registers are 64 bits wide
55  bool IsGP64bit;
56
57  // HasVFPU - Processor has a vector floating point unit.
58  bool HasVFPU;
59
60  // isLinux - Target system is Linux. Is false we consider ELFOS for now.
61  bool IsLinux;
62
63  /// Features related to the presence of specific instructions.
64
65  // HasSEInReg - SEB and SEH (signext in register) instructions.
66  bool HasSEInReg;
67
68  // HasCondMov - Conditional mov (MOVZ, MOVN) instructions.
69  bool HasCondMov;
70
71  // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu)
72  // instructions.
73  bool HasMulDivAdd;
74
75  // HasMinMax - MIN and MAX instructions.
76  bool HasMinMax;
77
78  // HasSwap - Byte and half swap instructions.
79  bool HasSwap;
80
81  // HasBitCount - Count leading '1' and '0' bits.
82  bool HasBitCount;
83
84  InstrItineraryData InstrItins;
85
86public:
87
88  /// Only O32 and EABI supported right now.
89  bool isABI_EABI() const { return MipsABI == EABI; }
90  bool isABI_O32() const { return MipsABI == O32; }
91  unsigned getTargetABI() const { return MipsABI; }
92
93  /// This constructor initializes the data members to match that
94  /// of the specified triple.
95  MipsSubtarget(const std::string &TT, const std::string &FS, bool little);
96
97  /// ParseSubtargetFeatures - Parses features string setting specified
98  /// subtarget options.  Definition of function is auto generated by tblgen.
99  std::string ParseSubtargetFeatures(const std::string &FS,
100                                     const std::string &CPU);
101
102  bool isMips1() const { return MipsArchVersion == Mips1; }
103  bool isMips32() const { return MipsArchVersion >= Mips32; }
104  bool isMips32r2() const { return MipsArchVersion == Mips32r2; }
105
106  bool isLittle() const { return IsLittle; }
107  bool isFP64bit() const { return IsFP64bit; }
108  bool isGP64bit() const { return IsGP64bit; }
109  bool isGP32bit() const { return !IsGP64bit; }
110  bool isSingleFloat() const { return IsSingleFloat; }
111  bool isNotSingleFloat() const { return !IsSingleFloat; }
112  bool hasVFPU() const { return HasVFPU; }
113  bool isLinux() const { return IsLinux; }
114
115  /// Features related to the presence of specific instructions.
116  bool hasSEInReg()   const { return HasSEInReg; }
117  bool hasCondMov()   const { return HasCondMov; }
118  bool hasMulDivAdd() const { return HasMulDivAdd; }
119  bool hasMinMax()    const { return HasMinMax; }
120  bool hasSwap()      const { return HasSwap; }
121  bool hasBitCount()  const { return HasBitCount; }
122};
123} // End llvm namespace
124
125#endif
126