//===- X86.td - Target definition file for the Intel X86 ---*- tablegen -*-===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// 
//===----------------------------------------------------------------------===//
//
// This is a target description file for the Intel i386 architecture, refered to
// here as the "X86" architecture.
//
//===----------------------------------------------------------------------===//

// Get the target-independent interfaces which we are implementing...
//
include "llvm/Target/Target.td"

//===----------------------------------------------------------------------===//
// X86 Subtarget features.
//===----------------------------------------------------------------------===//
 
def FeatureMMX     : SubtargetFeature<"mmx","X86SSELevel", "MMX",
                                      "Enable MMX instructions">;
def FeatureSSE1    : SubtargetFeature<"sse", "X86SSELevel", "SSE1",
                                      "Enable SSE instructions",
                                      [FeatureMMX]>;
def FeatureSSE2    : SubtargetFeature<"sse2", "X86SSELevel", "SSE2",
                                      "Enable SSE2 instructions",
                                      [FeatureSSE1]>;
def FeatureSSE3    : SubtargetFeature<"sse3", "X86SSELevel", "SSE3",
                                      "Enable SSE3 instructions",
                                      [FeatureSSE2]>;
def FeatureSSSE3   : SubtargetFeature<"ssse3", "X86SSELevel", "SSSE3",
                                      "Enable SSSE3 instructions",
                                      [FeatureSSE3]>;
def FeatureSSE41   : SubtargetFeature<"sse41", "X86SSELevel", "SSE41",
                                      "Enable SSE 4.1 instructions",
                                      [FeatureSSSE3]>;
def FeatureSSE42   : SubtargetFeature<"sse42", "X86SSELevel", "SSE42",
                                      "Enable SSE 4.2 instructions",
                                      [FeatureSSE41]>;
def Feature3DNow   : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
                                      "Enable 3DNow! instructions">;
def Feature3DNowA  : SubtargetFeature<"3dnowa", "X863DNowLevel", "ThreeDNowA",
                                      "Enable 3DNow! Athlon instructions",
                                      [Feature3DNow]>;
def Feature64Bit   : SubtargetFeature<"64bit", "HasX86_64", "true",
                                      "Support 64-bit instructions",
                                      [FeatureSSE2]>;
def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
                                       "Bit testing of memory is slow">;

//===----------------------------------------------------------------------===//
// X86 processors supported.
//===----------------------------------------------------------------------===//

class Proc<string Name, list<SubtargetFeature> Features>
 : Processor<Name, NoItineraries, Features>;

def : Proc<"generic",         []>;
def : Proc<"i386",            []>;
def : Proc<"i486",            []>;
def : Proc<"i586",            []>;
def : Proc<"pentium",         []>;
def : Proc<"pentium-mmx",     [FeatureMMX]>;
def : Proc<"i686",            []>;
def : Proc<"pentiumpro",      []>;
def : Proc<"pentium2",        [FeatureMMX]>;
def : Proc<"pentium3",        [FeatureSSE1]>;
def : Proc<"pentium-m",       [FeatureSSE2, FeatureSlowBTMem]>;
def : Proc<"pentium4",        [FeatureSSE2]>;
def : Proc<"x86-64",          [Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"yonah",           [FeatureSSE3, FeatureSlowBTMem]>;
def : Proc<"prescott",        [FeatureSSE3, FeatureSlowBTMem]>;
def : Proc<"nocona",          [FeatureSSE3,   Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"core2",           [FeatureSSSE3,  Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"penryn",          [FeatureSSE41,  Feature64Bit, FeatureSlowBTMem]>;

def : Proc<"k6",              [FeatureMMX]>;
def : Proc<"k6-2",            [FeatureMMX,    Feature3DNow]>;
def : Proc<"k6-3",            [FeatureMMX,    Feature3DNow]>;
def : Proc<"athlon",          [FeatureMMX,    Feature3DNowA, FeatureSlowBTMem]>;
def : Proc<"athlon-tbird",    [FeatureMMX,    Feature3DNowA, FeatureSlowBTMem]>;
def : Proc<"athlon-4",        [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
def : Proc<"athlon-xp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
def : Proc<"athlon-mp",       [FeatureSSE1,   Feature3DNowA, FeatureSlowBTMem]>;
def : Proc<"k8",              [Feature3DNowA, Feature64Bit,  FeatureSlowBTMem]>;
def : Proc<"opteron",         [Feature3DNowA, Feature64Bit,  FeatureSlowBTMem]>;
def : Proc<"athlon64",        [Feature3DNowA, Feature64Bit,  FeatureSlowBTMem]>;
def : Proc<"athlon-fx",       [Feature3DNowA, Feature64Bit,  FeatureSlowBTMem]>;

def : Proc<"winchip-c6",      [FeatureMMX]>;
def : Proc<"winchip2",        [FeatureMMX, Feature3DNow]>;
def : Proc<"c3",              [FeatureMMX, Feature3DNow]>;
def : Proc<"c3-2",            [FeatureSSE1]>;

//===----------------------------------------------------------------------===//
// Register File Description
//===----------------------------------------------------------------------===//

include "X86RegisterInfo.td"

//===----------------------------------------------------------------------===//
// Instruction Descriptions
//===----------------------------------------------------------------------===//

include "X86InstrInfo.td"

def X86InstrInfo : InstrInfo {

  // Define how we want to layout our TargetSpecific information field... This
  // should be kept up-to-date with the fields in the X86InstrInfo.h file.
  let TSFlagsFields = ["FormBits",
                       "hasOpSizePrefix",
                       "hasAdSizePrefix",
                       "Prefix",
                       "hasREX_WPrefix",
                       "ImmTypeBits",
                       "FPFormBits",
                       "hasLockPrefix",
                       "SegOvrBits",
                       "Opcode"];
  let TSFlagsShifts = [0,
                       6,
                       7,
                       8,
                       12,
                       13,
                       16,
                       19,
                       20,
                       24];
}

//===----------------------------------------------------------------------===//
// Calling Conventions
//===----------------------------------------------------------------------===//

include "X86CallingConv.td"


//===----------------------------------------------------------------------===//
// Assembly Printers
//===----------------------------------------------------------------------===//

// The X86 target supports two different syntaxes for emitting machine code.
// This is controlled by the -x86-asm-syntax={att|intel}
def ATTAsmWriter : AsmWriter {
  string AsmWriterClassName  = "ATTAsmPrinter";
  int Variant = 0;
}
def IntelAsmWriter : AsmWriter {
  string AsmWriterClassName  = "IntelAsmPrinter";
  int Variant = 1;
}


def X86 : Target {
  // Information about the instructions...
  let InstructionSet = X86InstrInfo;

  let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];
}