1 //=====-- MipsSubtarget.h - Define Subtarget for the Mips -----*- C++ -*--====//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the Mips specific subclass of TargetSubtarget.
12 //===----------------------------------------------------------------------===//
14 #ifndef MIPSSUBTARGET_H
15 #define MIPSSUBTARGET_H
17 #include "llvm/Target/TargetSubtarget.h"
18 #include "llvm/Target/TargetMachine.h"
24 class MipsSubtarget : public TargetSubtarget {
28 O32, O64, N32, N64, EABI
34 Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2
37 // Mips architecture version
38 MipsArchEnum MipsArchVersion;
40 // Mips supported ABIs
43 // IsLittle - The target is Little Endian
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.
51 // IsFP64bit - The target processor has 64-bit floating point registers.
54 // IsFP64bit - General-purpose registers are 64 bits wide
57 // HasVFPU - Processor has a vector floating point unit.
60 // isLinux - Target system is Linux. Is false we consider ELFOS for now.
63 /// Features related to the presence of specific instructions.
65 // HasSEInReg - SEB and SEH (signext in register) instructions.
68 // HasCondMov - Conditional mov (MOVZ, MOVN) instructions.
71 // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu)
75 // HasMinMax - MIN and MAX instructions.
78 // HasSwap - Byte and half swap instructions.
81 // HasBitCount - Count leading '1' and '0' bits.
84 InstrItineraryData InstrItins;
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; }
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);
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);
102 bool isMips1() const { return MipsArchVersion == Mips1; }
103 bool isMips32() const { return MipsArchVersion >= Mips32; }
104 bool isMips32r2() const { return MipsArchVersion == Mips32r2; }
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; }
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; }
123 } // End llvm namespace