1 //===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===//
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 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
11 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
12 
13 #include "llvm/ADT/ArrayRef.h"
14 #include "llvm/ADT/Triple.h"
15 #include "llvm/MC/MCRegisterInfo.h"
16 
17 namespace llvm {
18 
19 class MCTargetOptions;
20 class StringRef;
21 class TargetRegisterClass;
22 
23 class MipsABIInfo {
24 public:
25   enum class ABI { Unknown, O32, N32, N64, EABI };
26 
27 protected:
28   ABI ThisABI;
29 
30 public:
MipsABIInfo(ABI ThisABI)31   MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {}
32 
Unknown()33   static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); }
O32()34   static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); }
N32()35   static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); }
N64()36   static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); }
EABI()37   static MipsABIInfo EABI() { return MipsABIInfo(ABI::EABI); }
38   static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU,
39                                       const MCTargetOptions &Options);
40 
IsKnown()41   bool IsKnown() const { return ThisABI != ABI::Unknown; }
IsO32()42   bool IsO32() const { return ThisABI == ABI::O32; }
IsN32()43   bool IsN32() const { return ThisABI == ABI::N32; }
IsN64()44   bool IsN64() const { return ThisABI == ABI::N64; }
IsEABI()45   bool IsEABI() const { return ThisABI == ABI::EABI; }
GetEnumValue()46   ABI GetEnumValue() const { return ThisABI; }
47 
48   /// The registers to use for byval arguments.
49   ArrayRef<MCPhysReg> GetByValArgRegs() const;
50 
51   /// The registers to use for the variable argument list.
52   ArrayRef<MCPhysReg> GetVarArgRegs() const;
53 
54   /// Ordering of ABI's
55   /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given
56   /// multiple ABI options.
57   bool operator<(const MipsABIInfo Other) const {
58     return ThisABI < Other.GetEnumValue();
59   }
60 
61   unsigned GetStackPtr() const;
62   unsigned GetFramePtr() const;
63   unsigned GetBasePtr() const;
64   unsigned GetNullPtr() const;
65   unsigned GetZeroReg() const;
66   unsigned GetPtrAdduOp() const;
67   unsigned GetPtrAddiuOp() const;
68   unsigned GetGPRMoveOp() const;
ArePtrs64bit()69   inline bool ArePtrs64bit() const { return IsN64(); }
AreGprs64bit()70   inline bool AreGprs64bit() const { return IsN32() || IsN64(); }
71 
72   unsigned GetEhDataReg(unsigned I) const;
73 };
74 }
75 
76 #endif
77