lib/Target/X86/X86.td

   1 //===- X86.td - Target definition file for the Intel X86 ---*- tablegen -*-===//
   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 // This is a target description file for the Intel i386 architecture, referred
  11 // to here as the "X86" architecture.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 // Get the target-independent interfaces which we are implementing...
  16 //
  17 include "llvm/Target/Target.td"
  18
  19 //===----------------------------------------------------------------------===//
  20 // X86 Subtarget state.
  21 //
  22
  23 def Mode64Bit : SubtargetFeature<"64bit-mode", "In64BitMode", "true",
  24                                   "64-bit mode (x86_64)">;
  25
  26 //===----------------------------------------------------------------------===//
  27 // X86 Subtarget features.
  28 //===----------------------------------------------------------------------===//
  29
  30 def FeatureCMOV    : SubtargetFeature<"cmov","HasCMov", "true",
  31                                       "Enable conditional move instructions">;
  32
  33 def FeaturePOPCNT   : SubtargetFeature<"popcnt", "HasPOPCNT", "true",
  34                                        "Support POPCNT instruction">;
  35
  36
  37 def FeatureMMX     : SubtargetFeature<"mmx","X86SSELevel", "MMX",
  38                                       "Enable MMX instructions">;
  39 def FeatureSSE1    : SubtargetFeature<"sse", "X86SSELevel", "SSE1",
  40                                       "Enable SSE instructions",
  41                                       // SSE codegen depends on cmovs, and all
  42                                       // SSE1+ processors support them.
  43                                       [FeatureMMX, FeatureCMOV]>;
  44 def FeatureSSE2    : SubtargetFeature<"sse2", "X86SSELevel", "SSE2",
  45                                       "Enable SSE2 instructions",
  46                                       [FeatureSSE1]>;
  47 def FeatureSSE3    : SubtargetFeature<"sse3", "X86SSELevel", "SSE3",
  48                                       "Enable SSE3 instructions",
  49                                       [FeatureSSE2]>;
  50 def FeatureSSSE3   : SubtargetFeature<"ssse3", "X86SSELevel", "SSSE3",
  51                                       "Enable SSSE3 instructions",
  52                                       [FeatureSSE3]>;
  53 def FeatureSSE41   : SubtargetFeature<"sse41", "X86SSELevel", "SSE41",
  54                                       "Enable SSE 4.1 instructions",
  55                                       [FeatureSSSE3]>;
  56 def FeatureSSE42   : SubtargetFeature<"sse42", "X86SSELevel", "SSE42",
  57                                       "Enable SSE 4.2 instructions",
  58                                       [FeatureSSE41]>;
  59 def Feature3DNow   : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
  60                                       "Enable 3DNow! instructions",
  61                                       [FeatureMMX]>;
  62 def Feature3DNowA  : SubtargetFeature<"3dnowa", "X863DNowLevel", "ThreeDNowA",
  63                                       "Enable 3DNow! Athlon instructions",
  64                                       [Feature3DNow]>;
  65 // All x86-64 hardware has SSE2, but we don't mark SSE2 as an implied
  66 // feature, because SSE2 can be disabled (e.g. for compiling OS kernels)
  67 // without disabling 64-bit mode.
  68 def Feature64Bit   : SubtargetFeature<"64bit", "HasX86_64", "true",
  69                                       "Support 64-bit instructions",
  70                                       [FeatureCMOV]>;
  71 def FeatureCMPXCHG16B : SubtargetFeature<"cmpxchg16b", "HasCmpxchg16b", "true",
  72                                       "64-bit with cmpxchg16b",
  73                                       [Feature64Bit]>;
  74 def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
  75                                        "Bit testing of memory is slow">;
  76 def FeatureFastUAMem : SubtargetFeature<"fast-unaligned-mem",
  77                                         "IsUAMemFast", "true",
  78                                         "Fast unaligned memory access">;
  79 def FeatureSSE4A   : SubtargetFeature<"sse4a", "HasSSE4A", "true",
  80                                       "Support SSE 4a instructions">;
  81
  82 def FeatureAVX     : SubtargetFeature<"avx", "HasAVX", "true",
  83                                       "Enable AVX instructions">;
  84 def FeatureAVX2    : SubtargetFeature<"avx2", "HasAVX2", "true",
  85                                       "Enable AVX2 instructions",
  86                                       [FeatureAVX]>;
  87 def FeatureCLMUL   : SubtargetFeature<"clmul", "HasCLMUL", "true",
  88                                "Enable carry-less multiplication instructions">;
  89 def FeatureFMA3    : SubtargetFeature<"fma3", "HasFMA3", "true",
  90                                      "Enable three-operand fused multiple-add">;
  91 def FeatureFMA4    : SubtargetFeature<"fma4", "HasFMA4", "true",
  92                                       "Enable four-operand fused multiple-add">;
  93 def FeatureXOP    : SubtargetFeature<"xop", "HasXOP", "true",
  94                                       "Enable XOP instructions">;
  95 def FeatureVectorUAMem : SubtargetFeature<"vector-unaligned-mem",
  96                                           "HasVectorUAMem", "true",
  97                  "Allow unaligned memory operands on vector/SIMD instructions">;
  98 def FeatureAES     : SubtargetFeature<"aes", "HasAES", "true",
  99                                       "Enable AES instructions">;
 100 def FeatureMOVBE   : SubtargetFeature<"movbe", "HasMOVBE", "true",
 101                                       "Support MOVBE instruction">;
 102 def FeatureRDRAND  : SubtargetFeature<"rdrand", "HasRDRAND", "true",
 103                                       "Support RDRAND instruction">;
 104 def FeatureF16C    : SubtargetFeature<"f16c", "HasF16C", "true",
 105                        "Support 16-bit floating point conversion instructions">;
 106 def FeatureFSGSBase : SubtargetFeature<"fsgsbase", "HasFSGSBase", "true",
 107                                        "Support FS/GS Base instructions">;
 108 def FeatureLZCNT   : SubtargetFeature<"lzcnt", "HasLZCNT", "true",
 109                                       "Support LZCNT instruction">;
 110 def FeatureBMI     : SubtargetFeature<"bmi", "HasBMI", "true",
 111                                       "Support BMI instructions">;
 112 def FeatureBMI2    : SubtargetFeature<"bmi2", "HasBMI2", "true",
 113                                       "Support BMI2 instructions">;
 114
 115 //===----------------------------------------------------------------------===//
 116 // X86 processors supported.
 117 //===----------------------------------------------------------------------===//
 118
 119 class Proc<string Name, list<SubtargetFeature> Features>
 120  : Processor<Name, NoItineraries, Features>;
 121
 122 def : Proc<"generic",         []>;
 123 def : Proc<"i386",            []>;
 124 def : Proc<"i486",            []>;
 125 def : Proc<"i586",            []>;
 126 def : Proc<"pentium",         []>;
 127 def : Proc<"pentium-mmx",     [FeatureMMX]>;
 128 def : Proc<"i686",            []>;
 129 def : Proc<"pentiumpro",      [FeatureCMOV]>;
 130 def : Proc<"pentium2",        [FeatureMMX, FeatureCMOV]>;
 131 def : Proc<"pentium3",        [FeatureSSE1]>;
 132 def : Proc<"pentium3m",       [FeatureSSE1, FeatureSlowBTMem]>;
 133 def : Proc<"pentium-m",       [FeatureSSE2, FeatureSlowBTMem]>;
 134 def : Proc<"pentium4",        [FeatureSSE2]>;
 135 def : Proc<"pentium4m",       [FeatureSSE2, FeatureSlowBTMem]>;
 136 def : Proc<"x86-64",          [FeatureSSE2, Feature64Bit, FeatureSlowBTMem]>;
 137 def : Proc<"yonah",           [FeatureSSE3, FeatureSlowBTMem]>;
 138 def : Proc<"prescott",        [FeatureSSE3, FeatureSlowBTMem]>;
 139 def : Proc<"nocona",          [FeatureSSE3, FeatureCMPXCHG16B,
 140                                FeatureSlowBTMem]>;
 141 def : Proc<"core2",           [FeatureSSSE3, FeatureCMPXCHG16B,
 142                                FeatureSlowBTMem]>;
 143 def : Proc<"penryn",          [FeatureSSE41, FeatureCMPXCHG16B,
 144                                FeatureSlowBTMem]>;
 145 def : Proc<"atom",            [FeatureSSE3, FeatureCMPXCHG16B, FeatureMOVBE,
 146                                FeatureSlowBTMem]>;
 147 // "Arrandale" along with corei3 and corei5
 148 def : Proc<"corei7",          [FeatureSSE42, FeatureCMPXCHG16B,
 149                                FeatureSlowBTMem, FeatureFastUAMem,
 150                                FeaturePOPCNT, FeatureAES]>;
 151 def : Proc<"nehalem",         [FeatureSSE42,  FeatureCMPXCHG16B,
 152                                FeatureSlowBTMem, FeatureFastUAMem,
 153                                FeaturePOPCNT]>;
 154 // Westmere is a similar machine to nehalem with some additional features.
 155 // Westmere is the corei3/i5/i7 path from nehalem to sandybridge
 156 def : Proc<"westmere",        [FeatureSSE42, FeatureCMPXCHG16B,
 157                                FeatureSlowBTMem, FeatureFastUAMem,
 158                                FeaturePOPCNT, FeatureAES, FeatureCLMUL]>;
 159 // Sandy Bridge
 160 // SSE is not listed here since llvm treats AVX as a reimplementation of SSE,
 161 // rather than a superset.
 162 // FIXME: Disabling AVX for now since it's not ready.
 163 def : Proc<"corei7-avx",      [FeatureSSE42, FeatureCMPXCHG16B, FeaturePOPCNT,
 164                                FeatureAES, FeatureCLMUL]>;
 165 // Ivy Bridge
 166 def : Proc<"core-avx-i",      [FeatureSSE42, FeatureCMPXCHG16B, FeaturePOPCNT,
 167                                FeatureAES, FeatureCLMUL,
 168                                FeatureRDRAND, FeatureF16C, FeatureFSGSBase]>;
 169
 170 // Haswell
 171 // FIXME: Disabling AVX/AVX2 for now since it's not ready.
 172 def : Proc<"core-avx2",       [FeatureSSE42, FeatureCMPXCHG16B, FeaturePOPCNT,
 173                                FeatureAES, FeatureCLMUL, FeatureRDRAND,
 174                                FeatureF16C, FeatureFSGSBase, FeatureFMA3,
 175                                FeatureMOVBE, FeatureLZCNT, FeatureBMI,
 176                                FeatureBMI2]>;
 177
 178 def : Proc<"k6",              [FeatureMMX]>;
 179 def : Proc<"k6-2",            [Feature3DNow]>;
 180 def : Proc<"k6-3",            [Feature3DNow]>;
 181 def : Proc<"athlon",          [Feature3DNowA, FeatureSlowBTMem]>;
 182 def : Proc<"athlon-tbird",    [Feature3DNowA, FeatureSlowBTMem]>;
 183 def : Proc<"athlon-4",        [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 184 def : Proc<"athlon-xp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 185 def : Proc<"athlon-mp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 186 def : Proc<"k8",              [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 187                                FeatureSlowBTMem]>;
 188 def : Proc<"opteron",         [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 189                                FeatureSlowBTMem]>;
 190 def : Proc<"athlon64",        [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 191                                FeatureSlowBTMem]>;
 192 def : Proc<"athlon-fx",       [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 193                                FeatureSlowBTMem]>;
 194 def : Proc<"k8-sse3",         [FeatureSSE3,   Feature3DNowA, FeatureCMPXCHG16B,
 195                                FeatureSlowBTMem]>;
 196 def : Proc<"opteron-sse3",    [FeatureSSE3,   Feature3DNowA, FeatureCMPXCHG16B,
 197                                FeatureSlowBTMem]>;
 198 def : Proc<"athlon64-sse3",   [FeatureSSE3,   Feature3DNowA, FeatureCMPXCHG16B,
 199                                FeatureSlowBTMem]>;
 200 def : Proc<"amdfam10",        [FeatureSSE3,   FeatureSSE4A,
 201                                Feature3DNowA, FeatureCMPXCHG16B, FeatureLZCNT,
 202                                FeaturePOPCNT, FeatureSlowBTMem]>;
 203 // FIXME: Disabling AVX for now since it's not ready.
 204 def : Proc<"bdver1",          [FeatureSSE42, FeatureSSE4A, FeatureCMPXCHG16B,
 205                                FeatureAES, FeatureCLMUL, FeatureFMA4,
 206                                FeatureXOP, FeatureLZCNT, FeaturePOPCNT]>;
 207 def : Proc<"bdver2",          [FeatureSSE42, FeatureSSE4A, FeatureCMPXCHG16B,
 208                                FeatureAES, FeatureCLMUL, FeatureFMA4,
 209                                FeatureXOP, FeatureF16C, FeatureLZCNT,
 210                                FeaturePOPCNT, FeatureBMI]>;
 211
 212 def : Proc<"winchip-c6",      [FeatureMMX]>;
 213 def : Proc<"winchip2",        [Feature3DNow]>;
 214 def : Proc<"c3",              [Feature3DNow]>;
 215 def : Proc<"c3-2",            [FeatureSSE1]>;
 216
 217 //===----------------------------------------------------------------------===//
 218 // Register File Description
 219 //===----------------------------------------------------------------------===//
 220
 221 include "X86RegisterInfo.td"
 222
 223 //===----------------------------------------------------------------------===//
 224 // Instruction Descriptions
 225 //===----------------------------------------------------------------------===//
 226
 227 include "X86InstrInfo.td"
 228
 229 def X86InstrInfo : InstrInfo;
 230
 231 //===----------------------------------------------------------------------===//
 232 // Calling Conventions
 233 //===----------------------------------------------------------------------===//
 234
 235 include "X86CallingConv.td"
 236
 237
 238 //===----------------------------------------------------------------------===//
 239 // Assembly Parser
 240 //===----------------------------------------------------------------------===//
 241
 242 // Currently the X86 assembly parser only supports ATT syntax.
 243 def ATTAsmParser : AsmParser {
 244   string AsmParserClassName = "ATTAsmParser";
 245   int Variant = 0;
 246
 247   // Discard comments in assembly strings.
 248   string CommentDelimiter = "#";
 249
 250   // Recognize hard coded registers.
 251   string RegisterPrefix = "%";
 252 }
 253
 254 //===----------------------------------------------------------------------===//
 255 // Assembly Printers
 256 //===----------------------------------------------------------------------===//
 257
 258 // The X86 target supports two different syntaxes for emitting machine code.
 259 // This is controlled by the -x86-asm-syntax={att|intel}
 260 def ATTAsmWriter : AsmWriter {
 261   string AsmWriterClassName  = "ATTInstPrinter";
 262   int Variant = 0;
 263   bit isMCAsmWriter = 1;
 264 }
 265 def IntelAsmWriter : AsmWriter {
 266   string AsmWriterClassName  = "IntelInstPrinter";
 267   int Variant = 1;
 268   bit isMCAsmWriter = 1;
 269 }
 270
 271 def X86 : Target {
 272   // Information about the instructions...
 273   let InstructionSet = X86InstrInfo;
 274
 275   let AssemblyParsers = [ATTAsmParser];
 276
 277   let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];
 278 }