llvm-mirror/lib/Target/IA64/IA64.td

//===-- IA64.td - Target definition file for Intel IA64 -------------------===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by Duraid Madina 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 IA64 architecture,
// also known variously as ia64, IA-64, IPF, "the Itanium architecture" etc.
//
//===----------------------------------------------------------------------===//

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

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

include "IA64RegisterInfo.td"

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

include "IA64InstrInfo.td"

def IA64InstrInfo : InstrInfo {
    let PHIInst = PHI;
}

def IA64 : Target {
  // The following registers are always saved across calls:
  let CalleeSavedRegisters = 
  
  //'preserved' GRs:
  
  [r4, r5, r6, r7,
  
  //'special' GRs:

//  r1, // global data pointer (GP)  - XXX NOT callee saved, we do it ourselves
//  r12, // memory stack pointer (SP)- XXX NOT callee saved, we do it ourselves
  // **** r13 (thread pointer) we do not touch, ever. it's not here. ****//
  //r15, // our frame pointer (FP)
  
  //'stacked' GRs the RSE takes care of, we don't worry about
/* We don't want PEI::calculateCallerSavedRegisters to worry about them,
  since the RSE takes care of them (and we determinethe appropriate
  'alloc' instructions and save/restore ar.pfs ourselves, in instruction
  selection)

**************************************************************************  
*  r32, r33, r34, r35,
*  r36, r37, r38, r39, r40, r41, r42, r43, r44, r45, r46, r47,
*  r48, r49, r50, r51, r52, r53, r54, r55, r56, r57, r58, r59,
*  r60, r61, r62, r63, r64, r65, r66, r67, r68, r69, r70, r71,
*  r72, r73, r74, r75, r76, r77, r78, r79, r80, r81, r82, r83,
*  r84, r85, r86, r87, r88, r89, r90, r91, r92, r93, r94, r95,
*  r96, r97, r98, r99, r100, r101, r102, r103, r104, r105, r106, r107,
*  r108, r109, r110, r111, r112, r113, r114, r115, r116, r117, r118, r119,
*  r120, r121, r122, r123, r124, r125, r126, r127,	
**************************************************************************
*/
  //'preserved' FP regs:

  F2,F3,F4,F5,
  F16,F17,F18,F19,F20,F21,F22,F23,
  F24,F25,F26,F27,F28,F29,F30,F31,
  
  //'preserved' predicate regs:

  p1, p2, p3, p4, p5,
  p16, p17, p18, p19, p20, p21, p22, p23,
  p24, p25, p26, p27, p28, p29, p30, p31,
  p32, p33, p34, p35, p36, p37, p38, p39,
  p40, p41, p42, p43, p44, p45, p46, p47,
  p48, p49, p50, p51, p52, p53, p54, p55,
  p56, p57, p58, p59, p60, p61, p62, p63];

  // We don't go anywhere near the LP32 variant of IA64 as 
  // sometimes seen in (for example) HP-UX
  let PointerType = i64;

  // Our instruction set
  let InstructionSet = IA64InstrInfo;

}