lib/Target/Mips/Mips.td

   1 //===- Mips.td - Describe the Mips Target Machine ---------------*- 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 // This is the top level entry point for the Mips target.
  10 //===----------------------------------------------------------------------===//
  11
  12 //===----------------------------------------------------------------------===//
  13 // Target-independent interfaces
  14 //===----------------------------------------------------------------------===//
  15
  16 include "../Target.td"
  17
  18 //===----------------------------------------------------------------------===//
  19 // Register File, Calling Conv, Instruction Descriptions
  20 //===----------------------------------------------------------------------===//
  21
  22 include "MipsRegisterInfo.td"
  23 include "MipsSchedule.td"
  24 include "MipsInstrInfo.td"
  25 include "MipsCallingConv.td"
  26
  27 def MipsInstrInfo : InstrInfo {
  28   let TSFlagsFields = [];
  29   let TSFlagsShifts = [];
  30 }
  31
  32 //===----------------------------------------------------------------------===//
  33 // Mips Subtarget features                                                    //
  34 //===----------------------------------------------------------------------===//
  35
  36 def FeatureGP64Bit     : SubtargetFeature<"gp64", "IsGP64bit", "true",
  37                                 "General Purpose Registers are 64-bit wide.">;
  38 def FeatureFP64Bit     : SubtargetFeature<"fp64", "IsFP64bit", "true",
  39                                 "Support 64-bit FP registers.">;
  40 def FeatureSingleFloat : SubtargetFeature<"single-float", "IsSingleFloat",
  41                                 "true", "Only supports single precision float">;
  42 def FeatureMips2       : SubtargetFeature<"mips2", "MipsArchVersion", "Mips2",
  43                                 "Mips2 ISA Support">;
  44 def FeatureO32         : SubtargetFeature<"o32", "MipsABI", "O32",
  45                                 "Enable o32 ABI">;
  46 def FeatureEABI        : SubtargetFeature<"eabi", "MipsABI", "EABI",
  47                                 "Enable eabi ABI">;
  48 def FeatureVFPU        : SubtargetFeature<"vfpu", "HasVFPU",
  49                                 "true", "Enable vector FPU instructions.">;
  50 def FeatureSEInReg     : SubtargetFeature<"seinreg", "HasSEInReg", "true",
  51                                 "Enable 'signext in register' instructions.">;
  52
  53 //===----------------------------------------------------------------------===//
  54 // Mips processors supported.
  55 //===----------------------------------------------------------------------===//
  56
  57 class Proc<string Name, list<SubtargetFeature> Features>
  58  : Processor<Name, MipsGenericItineraries, Features>;
  59
  60 def : Proc<"mips1", []>;
  61 def : Proc<"r2000", []>;
  62 def : Proc<"r3000", []>;
  63
  64 def : Proc<"mips2", [FeatureMips2]>;
  65 def : Proc<"r6000", [FeatureMips2]>;
  66
  67 // Allegrex is a 32bit subset of r4000, both for interger and fp registers,
  68 // but much more similar to Mips2 than Mips3.
  69 def : Proc<"allegrex", [FeatureMips2, FeatureSingleFloat, FeatureEABI,
  70                         FeatureSEInReg, FeatureVFPU]>;
  71
  72 def Mips : Target {
  73   let InstructionSet = MipsInstrInfo;
  74 }