1//===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
10#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H
11
12#include "llvm/IR/CallingConv.h"
13#include "llvm/MC/MCRegisterInfo.h"
14#include "llvm/TargetParser/Triple.h"
15
16namespace llvm {
17
18template <typename T> class ArrayRef;
19class MCTargetOptions;
20class StringRef;
21
22class MipsABIInfo {
23public:
24 enum class ABI { Unknown, O32, N32, N64 };
25
26protected:
27 ABI ThisABI;
28
29public:
30 MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {}
31
32 static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); }
33 static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); }
34 static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); }
35 static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); }
36 static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU,
37 const MCTargetOptions &Options);
38
39 bool IsKnown() const { return ThisABI != ABI::Unknown; }
40 bool IsO32() const { return ThisABI == ABI::O32; }
41 bool IsN32() const { return ThisABI == ABI::N32; }
42 bool IsN64() const { return ThisABI == ABI::N64; }
43 ABI GetEnumValue() const { return ThisABI; }
44
45 /// The registers to use for byval arguments.
46 ArrayRef<MCPhysReg> GetByValArgRegs() const;
47
48 /// The registers to use for the variable argument list.
49 ArrayRef<MCPhysReg> getVarArgRegs(bool isGP64bit) const;
50
51 /// Obtain the size of the area allocated by the callee for arguments.
52 /// CallingConv::FastCall affects the value for O32.
53 unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const;
54
55 /// Ordering of ABI's
56 /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given
57 /// multiple ABI options.
58 bool operator<(const MipsABIInfo Other) const {
59 return ThisABI < Other.GetEnumValue();
60 }
61
62 unsigned GetStackPtr() const;
63 unsigned GetFramePtr() const;
64 unsigned GetBasePtr() const;
65 unsigned GetGlobalPtr() const;
66 unsigned GetNullPtr() const;
67 unsigned GetZeroReg() const;
68 unsigned GetPtrAdduOp() const;
69 unsigned GetPtrAddiuOp() const;
70 unsigned GetPtrSubuOp() const;
71 unsigned GetPtrAndOp() const;
72 unsigned GetGPRMoveOp() const;
73 inline bool ArePtrs64bit() const { return IsN64(); }
74 inline bool AreGprs64bit() const { return IsN32() || IsN64(); }
75
76 unsigned GetEhDataReg(unsigned I) const;
77};
78}
79
80#endif
81