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, refered to
  11 // 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 features.
  21 //===----------------------------------------------------------------------===//
  22
  23 def FeatureCMOV    : SubtargetFeature<"cmov","HasCMov", "true",
  24                                       "Enable conditional move instructions">;
  25
  26 def FeatureMMX     : SubtargetFeature<"mmx","X86SSELevel", "MMX",
  27                                       "Enable MMX instructions">;
  28 def FeatureSSE1    : SubtargetFeature<"sse", "X86SSELevel", "SSE1",
  29                                       "Enable SSE instructions",
  30                                       // SSE codegen depends on cmovs, and all
  31                                       // SSE1+ processors support them.
  32                                       [FeatureMMX, FeatureCMOV]>;
  33 def FeatureSSE2    : SubtargetFeature<"sse2", "X86SSELevel", "SSE2",
  34                                       "Enable SSE2 instructions",
  35                                       [FeatureSSE1]>;
  36 def FeatureSSE3    : SubtargetFeature<"sse3", "X86SSELevel", "SSE3",
  37                                       "Enable SSE3 instructions",
  38                                       [FeatureSSE2]>;
  39 def FeatureSSSE3   : SubtargetFeature<"ssse3", "X86SSELevel", "SSSE3",
  40                                       "Enable SSSE3 instructions",
  41                                       [FeatureSSE3]>;
  42 def FeatureSSE41   : SubtargetFeature<"sse41", "X86SSELevel", "SSE41",
  43                                       "Enable SSE 4.1 instructions",
  44                                       [FeatureSSSE3]>;
  45 def FeatureSSE42   : SubtargetFeature<"sse42", "X86SSELevel", "SSE42",
  46                                       "Enable SSE 4.2 instructions",
  47                                       [FeatureSSE41]>;
  48 def Feature3DNow   : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
  49                                       "Enable 3DNow! instructions">;
  50 def Feature3DNowA  : SubtargetFeature<"3dnowa", "X863DNowLevel", "ThreeDNowA",
  51                                       "Enable 3DNow! Athlon instructions",
  52                                       [Feature3DNow]>;
  53 // All x86-64 hardware has SSE2, but we don't mark SSE2 as an implied
  54 // feature, because SSE2 can be disabled (e.g. for compiling OS kernels)
  55 // without disabling 64-bit mode.
  56 def Feature64Bit   : SubtargetFeature<"64bit", "HasX86_64", "true",
  57                                       "Support 64-bit instructions">;
  58 def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
  59                                        "Bit testing of memory is slow">;
  60 def FeatureSSE4A   : SubtargetFeature<"sse4a", "HasSSE4A", "true",
  61                                       "Support SSE 4a instructions">;
  62
  63 def FeatureAVX     : SubtargetFeature<"avx", "HasAVX", "true",
  64                                       "Enable AVX instructions">;
  65 def FeatureFMA3    : SubtargetFeature<"fma3", "HasFMA3", "true",
  66                                       "Enable three-operand fused multiple-add">;
  67 def FeatureFMA4    : SubtargetFeature<"fma4", "HasFMA4", "true",
  68                                       "Enable four-operand fused multiple-add">;
  69
  70 //===----------------------------------------------------------------------===//
  71 // X86 processors supported.
  72 //===----------------------------------------------------------------------===//
  73
  74 class Proc<string Name, list<SubtargetFeature> Features>
  75  : Processor<Name, NoItineraries, Features>;
  76
  77 def : Proc<"generic",         []>;
  78 def : Proc<"i386",            []>;
  79 def : Proc<"i486",            []>;
  80 def : Proc<"i586",            []>;
  81 def : Proc<"pentium",         []>;
  82 def : Proc<"pentium-mmx",     [FeatureMMX]>;
  83 def : Proc<"i686",            []>;
  84 def : Proc<"pentiumpro",      [FeatureCMOV]>;
  85 def : Proc<"pentium2",        [FeatureMMX, FeatureCMOV]>;
  86 def : Proc<"pentium3",        [FeatureSSE1]>;
  87 def : Proc<"pentium-m",       [FeatureSSE2, FeatureSlowBTMem]>;
  88 def : Proc<"pentium4",        [FeatureSSE2]>;
  89 def : Proc<"x86-64",          [FeatureSSE2,   Feature64Bit, FeatureSlowBTMem]>;
  90 def : Proc<"yonah",           [FeatureSSE3, FeatureSlowBTMem]>;
  91 def : Proc<"prescott",        [FeatureSSE3, FeatureSlowBTMem]>;
  92 def : Proc<"nocona",          [FeatureSSE3,   Feature64Bit, FeatureSlowBTMem]>;
  93 def : Proc<"core2",           [FeatureSSSE3,  Feature64Bit, FeatureSlowBTMem]>;
  94 def : Proc<"penryn",          [FeatureSSE41,  Feature64Bit, FeatureSlowBTMem]>;
  95 def : Proc<"atom",            [FeatureSSE3,   Feature64Bit, FeatureSlowBTMem]>;
  96 def : Proc<"corei7",          [FeatureSSE42,  Feature64Bit, FeatureSlowBTMem]>;
  97 def : Proc<"nehalem",         [FeatureSSE42,  Feature64Bit, FeatureSlowBTMem]>;
  98 // Sandy Bridge does not have FMA
  99 def : Proc<"sandybridge",     [FeatureSSE42,  FeatureAVX,   Feature64Bit]>;
 100
 101 def : Proc<"k6",              [FeatureMMX]>;
 102 def : Proc<"k6-2",            [FeatureMMX,    Feature3DNow]>;
 103 def : Proc<"k6-3",            [FeatureMMX,    Feature3DNow]>;
 104 def : Proc<"athlon",          [FeatureMMX,    Feature3DNowA, FeatureSlowBTMem]>;
 105 def : Proc<"athlon-tbird",    [FeatureMMX,    Feature3DNowA, FeatureSlowBTMem]>;
 106 def : Proc<"athlon-4",        [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 107 def : Proc<"athlon-xp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 108 def : Proc<"athlon-mp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
 109 def : Proc<"k8",              [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 110                                FeatureSlowBTMem]>;
 111 def : Proc<"opteron",         [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 112                                FeatureSlowBTMem]>;
 113 def : Proc<"athlon64",        [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 114                                FeatureSlowBTMem]>;
 115 def : Proc<"athlon-fx",       [FeatureSSE2,   Feature3DNowA, Feature64Bit,
 116                                FeatureSlowBTMem]>;
 117 def : Proc<"k8-sse3",         [FeatureSSE3,   Feature3DNowA, Feature64Bit,
 118                                FeatureSlowBTMem]>;
 119 def : Proc<"opteron-sse3",    [FeatureSSE3,   Feature3DNowA, Feature64Bit,
 120                                FeatureSlowBTMem]>;
 121 def : Proc<"athlon64-sse3",   [FeatureSSE3,   Feature3DNowA, Feature64Bit,
 122                                FeatureSlowBTMem]>;
 123 def : Proc<"amdfam10",        [FeatureSSE3,   FeatureSSE4A,
 124                                Feature3DNowA, Feature64Bit, FeatureSlowBTMem]>;
 125 def : Proc<"barcelona",       [FeatureSSE3,   FeatureSSE4A,
 126                                Feature3DNowA, Feature64Bit, FeatureSlowBTMem]>;
 127 def : Proc<"istanbul",        [Feature3DNowA, Feature64Bit, FeatureSSE4A,
 128                                Feature3DNowA]>;
 129 def : Proc<"shanghai",        [Feature3DNowA, Feature64Bit, FeatureSSE4A,
 130                                Feature3DNowA]>;
 131
 132 def : Proc<"winchip-c6",      [FeatureMMX]>;
 133 def : Proc<"winchip2",        [FeatureMMX, Feature3DNow]>;
 134 def : Proc<"c3",              [FeatureMMX, Feature3DNow]>;
 135 def : Proc<"c3-2",            [FeatureSSE1]>;
 136
 137 //===----------------------------------------------------------------------===//
 138 // Register File Description
 139 //===----------------------------------------------------------------------===//
 140
 141 include "X86RegisterInfo.td"
 142
 143 //===----------------------------------------------------------------------===//
 144 // Instruction Descriptions
 145 //===----------------------------------------------------------------------===//
 146
 147 include "X86InstrInfo.td"
 148
 149 def X86InstrInfo : InstrInfo {
 150
 151   // Define how we want to layout our TargetSpecific information field... This
 152   // should be kept up-to-date with the fields in the X86InstrInfo.h file.
 153   let TSFlagsFields = ["FormBits",
 154                        "hasOpSizePrefix",
 155                        "hasAdSizePrefix",
 156                        "Prefix",
 157                        "hasREX_WPrefix",
 158                        "ImmTypeBits",
 159                        "FPFormBits",
 160                        "hasLockPrefix",
 161                        "SegOvrBits",
 162                        "Opcode"];
 163   let TSFlagsShifts = [0,
 164                        6,
 165                        7,
 166                        8,
 167                        12,
 168                        13,
 169                        16,
 170                        19,
 171                        20,
 172                        24];
 173 }
 174
 175 //===----------------------------------------------------------------------===//
 176 // Calling Conventions
 177 //===----------------------------------------------------------------------===//
 178
 179 include "X86CallingConv.td"
 180
 181
 182 //===----------------------------------------------------------------------===//
 183 // Assembly Printers
 184 //===----------------------------------------------------------------------===//
 185
 186 // Currently the X86 assembly parser only supports ATT syntax.
 187 def ATTAsmParser : AsmParser {
 188   string AsmParserClassName  = "ATTAsmParser";
 189   int Variant = 0;
 190
 191   // Discard comments in assembly strings.
 192   string CommentDelimiter = "#";
 193
 194   // Recognize hard coded registers.
 195   string RegisterPrefix = "%";
 196 }
 197
 198 // The X86 target supports two different syntaxes for emitting machine code.
 199 // This is controlled by the -x86-asm-syntax={att|intel}
 200 def ATTAsmWriter : AsmWriter {
 201   string AsmWriterClassName  = "ATTInstPrinter";
 202   int Variant = 0;
 203 }
 204 def IntelAsmWriter : AsmWriter {
 205   string AsmWriterClassName  = "IntelAsmPrinter";
 206   int Variant = 1;
 207 }
 208
 209 def X86 : Target {
 210   // Information about the instructions...
 211   let InstructionSet = X86InstrInfo;
 212
 213   let AssemblyParsers = [ATTAsmParser];
 214
 215   let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];
 216 }