llvm-mirror/lib/Target/X86/X86.td

//===- X86.td - Target definition file for the Intel X86 arch ---*- C++ -*-===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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 "../Target.td"

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

include "X86RegisterInfo.td"

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

include "X86InstrInfo.td"

def X86InstrInfo : InstrInfo {
  let PHIInst  = PHI;

  // 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",
                       "Prefix",
                       "ImmTypeBits",
                       "FPFormBits",
                       "Opcode"];
  let TSFlagsShifts = [0,
                       5,
                       6,
                       10,
                       12,
                       16];
}

// 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 {
  // Specify the callee saved registers.
  let CalleeSavedRegisters = [ESI, EDI, EBX, EBP];

  // Yes, pointers are 32-bits in size.
  let PointerType = i32;

  // Information about the instructions...
  let InstructionSet = X86InstrInfo;

  let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];
}