lib/Target/ARM/ARM.td

   1 //===- ARM.td - Describe the ARM 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 //
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 //===----------------------------------------------------------------------===//
  14 // Target-independent interfaces which we are implementing
  15 //===----------------------------------------------------------------------===//
  16
  17 include "llvm/Target/Target.td"
  18
  19 //===----------------------------------------------------------------------===//
  20 // ARM Subtarget features.
  21 //
  22
  23 def ArchV4T     : SubtargetFeature<"v4t", "ARMArchVersion", "V4T",
  24                                    "ARM v4T">;
  25 def ArchV5T     : SubtargetFeature<"v5t", "ARMArchVersion", "V5T",
  26                                    "ARM v5T">;
  27 def ArchV5TE    : SubtargetFeature<"v5te", "ARMArchVersion", "V5TE",
  28                                    "ARM v5TE, v5TEj, v5TExp">;
  29 def ArchV6      : SubtargetFeature<"v6", "ARMArchVersion", "V6",
  30                                    "ARM v6">;
  31 def ArchV6T2    : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2",
  32                                    "ARM v6t2">;
  33 def ArchV7A     : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
  34                                    "ARM v7A">;
  35 def ArchV7M     : SubtargetFeature<"v7m", "ARMArchVersion", "V7M",
  36                                    "ARM v7M">;
  37 def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
  38                                    "Enable VFP2 instructions">;
  39 def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
  40                                    "Enable VFP3 instructions">;
  41 def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
  42                                    "Enable NEON instructions">;
  43 def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
  44                                      "Enable Thumb2 instructions">;
  45 def FeatureFP16   : SubtargetFeature<"fp16", "HasFP16", "true",
  46                                      "Enable half-precision floating point">;
  47 def FeatureHWDiv  : SubtargetFeature<"hwdiv", "HasHardwareDivide", "true",
  48                                      "Enable divide instructions">;
  49 def FeatureT2ExtractPack: SubtargetFeature<"t2xtpk", "HasT2ExtractPack", "true",
  50                                  "Enable Thumb2 extract and pack instructions">;
  51 def FeatureDB : SubtargetFeature<"db", "HasDataBarrier", "true",
  52                                  "Has data barrier (dmb / dsb) instructions">;
  53 def FeatureSlowFPBrcc : SubtargetFeature<"slow-fp-brcc", "SlowFPBrcc", "true",
  54                                          "FP compare + branch is slow">;
  55
  56 // Some processors have multiply-accumulate instructions that don't
  57 // play nicely with other VFP instructions, and it's generally better
  58 // to just not use them.
  59 // FIXME: Currently, this is only flagged for Cortex-A8. It may be true for
  60 // others as well. We should do more benchmarking and confirm one way or
  61 // the other.
  62 def FeatureHasSlowVMLx   : SubtargetFeature<"vmlx", "SlowVMLx", "true",
  63                                             "Disable VFP MAC instructions">;
  64 // Some processors benefit from using NEON instructions for scalar
  65 // single-precision FP operations.
  66 def FeatureNEONForFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
  67                                         "true",
  68                                         "Use NEON for single precision FP">;
  69
  70 // Disable 32-bit to 16-bit narrowing for experimentation.
  71 def FeaturePref32BitThumb : SubtargetFeature<"32bit", "Pref32BitThumb", "true",
  72                                              "Prefer 32-bit Thumb instrs">;
  73
  74 //===----------------------------------------------------------------------===//
  75 // ARM Processors supported.
  76 //
  77
  78 include "ARMSchedule.td"
  79
  80 class ProcNoItin<string Name, list<SubtargetFeature> Features>
  81  : Processor<Name, GenericItineraries, Features>;
  82
  83 // V4 Processors.
  84 def : ProcNoItin<"generic",         []>;
  85 def : ProcNoItin<"arm8",            []>;
  86 def : ProcNoItin<"arm810",          []>;
  87 def : ProcNoItin<"strongarm",       []>;
  88 def : ProcNoItin<"strongarm110",    []>;
  89 def : ProcNoItin<"strongarm1100",   []>;
  90 def : ProcNoItin<"strongarm1110",   []>;
  91
  92 // V4T Processors.
  93 def : ProcNoItin<"arm7tdmi",        [ArchV4T]>;
  94 def : ProcNoItin<"arm7tdmi-s",      [ArchV4T]>;
  95 def : ProcNoItin<"arm710t",         [ArchV4T]>;
  96 def : ProcNoItin<"arm720t",         [ArchV4T]>;
  97 def : ProcNoItin<"arm9",            [ArchV4T]>;
  98 def : ProcNoItin<"arm9tdmi",        [ArchV4T]>;
  99 def : ProcNoItin<"arm920",          [ArchV4T]>;
 100 def : ProcNoItin<"arm920t",         [ArchV4T]>;
 101 def : ProcNoItin<"arm922t",         [ArchV4T]>;
 102 def : ProcNoItin<"arm940t",         [ArchV4T]>;
 103 def : ProcNoItin<"ep9312",          [ArchV4T]>;
 104
 105 // V5T Processors.
 106 def : ProcNoItin<"arm10tdmi",       [ArchV5T]>;
 107 def : ProcNoItin<"arm1020t",        [ArchV5T]>;
 108
 109 // V5TE Processors.
 110 def : ProcNoItin<"arm9e",           [ArchV5TE]>;
 111 def : ProcNoItin<"arm926ej-s",      [ArchV5TE]>;
 112 def : ProcNoItin<"arm946e-s",       [ArchV5TE]>;
 113 def : ProcNoItin<"arm966e-s",       [ArchV5TE]>;
 114 def : ProcNoItin<"arm968e-s",       [ArchV5TE]>;
 115 def : ProcNoItin<"arm10e",          [ArchV5TE]>;
 116 def : ProcNoItin<"arm1020e",        [ArchV5TE]>;
 117 def : ProcNoItin<"arm1022e",        [ArchV5TE]>;
 118 def : ProcNoItin<"xscale",          [ArchV5TE]>;
 119 def : ProcNoItin<"iwmmxt",          [ArchV5TE]>;
 120
 121 // V6 Processors.
 122 def : Processor<"arm1136j-s",       ARMV6Itineraries, [ArchV6]>;
 123 def : Processor<"arm1136jf-s",      ARMV6Itineraries, [ArchV6, FeatureVFP2,
 124                                                        FeatureHasSlowVMLx]>;
 125 def : Processor<"arm1176jz-s",      ARMV6Itineraries, [ArchV6]>;
 126 def : Processor<"arm1176jzf-s",     ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
 127 def : Processor<"mpcorenovfp",      ARMV6Itineraries, [ArchV6]>;
 128 def : Processor<"mpcore",           ARMV6Itineraries, [ArchV6, FeatureVFP2]>;
 129
 130 // V6M Processors.
 131 def : Processor<"cortex-m0",        ARMV6Itineraries, [ArchV6, FeatureDB]>;
 132
 133 // V6T2 Processors.
 134 def : Processor<"arm1156t2-s",     ARMV6Itineraries,
 135                  [ArchV6T2, FeatureThumb2]>;
 136 def : Processor<"arm1156t2f-s",    ARMV6Itineraries,
 137                  [ArchV6T2, FeatureThumb2, FeatureVFP2]>;
 138
 139 // V7 Processors.
 140 def : Processor<"cortex-a8",        CortexA8Itineraries,
 141                 [ArchV7A, FeatureThumb2, FeatureNEON, FeatureHasSlowVMLx,
 142                  FeatureSlowFPBrcc, FeatureNEONForFP, FeatureT2ExtractPack,
 143                  FeatureDB]>;
 144 def : Processor<"cortex-a9",        CortexA9Itineraries,
 145                 [ArchV7A, FeatureThumb2, FeatureNEON, FeatureT2ExtractPack,
 146                  FeatureDB]>;
 147
 148 // V7M Processors.
 149 def : ProcNoItin<"cortex-m3",       [ArchV7M, FeatureThumb2, FeatureHWDiv,
 150                                      FeatureDB]>;
 151 def : ProcNoItin<"cortex-m4",       [ArchV7M, FeatureThumb2, FeatureHWDiv,
 152                                      FeatureDB]>;
 153
 154 //===----------------------------------------------------------------------===//
 155 // Register File Description
 156 //===----------------------------------------------------------------------===//
 157
 158 include "ARMRegisterInfo.td"
 159
 160 include "ARMCallingConv.td"
 161
 162 //===----------------------------------------------------------------------===//
 163 // Instruction Descriptions
 164 //===----------------------------------------------------------------------===//
 165
 166 include "ARMInstrInfo.td"
 167
 168 def ARMInstrInfo : InstrInfo;
 169
 170 //===----------------------------------------------------------------------===//
 171 // Declare the target which we are implementing
 172 //===----------------------------------------------------------------------===//
 173
 174 def ARM : Target {
 175   // Pull in Instruction Info:
 176   let InstructionSet = ARMInstrInfo;
 177 }