/*

 * Copyright 1999-2009 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

# include "incls/_precompiled.incl"

# include "incls/_c1_FrameMap_sparc.cpp.incl"

const int FrameMap::pd_c_runtime_reserved_arg_size = 7;

LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool outgoing) {

  LIR_Opr opr = LIR_OprFact::illegalOpr;

  VMReg r_1 = reg->first();

  VMReg r_2 = reg->second();

  if (r_1->is_stack()) {

    // Convert stack slot to an SP offset

    // The calling convention does not count the SharedRuntime::out_preserve_stack_slots() value

    // so we must add it in here.

    int st_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size;

    opr = LIR_OprFact::address(new LIR_Address(SP_opr, st_off + STACK_BIAS, type));

  } else if (r_1->is_Register()) {

    Register reg = r_1->as_Register();

    if (outgoing) {

      assert(!reg->is_in(), "should be using I regs");

    } else {

      assert(!reg->is_out(), "should be using O regs");

    }

    if (r_2->is_Register() && (type == T_LONG || type == T_DOUBLE)) {

      opr = as_long_opr(reg);

    } else if (type == T_OBJECT || type == T_ARRAY) {

      opr = as_oop_opr(reg);

    } else {

      opr = as_opr(reg);

    }

  } else if (r_1->is_FloatRegister()) {

    assert(type == T_DOUBLE || type == T_FLOAT, "wrong type");

    FloatRegister f = r_1->as_FloatRegister();

    if (type == T_DOUBLE) {

      opr = as_double_opr(f);

    } else {

      opr = as_float_opr(f);

    }

  }

  return opr;

}

//               FrameMap

//--------------------------------------------------------

FloatRegister FrameMap::_fpu_regs [FrameMap::nof_fpu_regs];

// some useful constant RInfo's:

LIR_Opr FrameMap::in_long_opr;

LIR_Opr FrameMap::out_long_opr;

LIR_Opr FrameMap::F0_opr;

LIR_Opr FrameMap::F0_double_opr;

LIR_Opr FrameMap::G0_opr;

LIR_Opr FrameMap::G1_opr;

LIR_Opr FrameMap::G2_opr;

LIR_Opr FrameMap::G3_opr;

LIR_Opr FrameMap::G4_opr;

LIR_Opr FrameMap::G5_opr;

LIR_Opr FrameMap::G6_opr;

LIR_Opr FrameMap::G7_opr;

LIR_Opr FrameMap::O0_opr;

LIR_Opr FrameMap::O1_opr;

LIR_Opr FrameMap::O2_opr;

LIR_Opr FrameMap::O3_opr;

LIR_Opr FrameMap::O4_opr;

LIR_Opr FrameMap::O5_opr;

LIR_Opr FrameMap::O6_opr;

LIR_Opr FrameMap::O7_opr;

LIR_Opr FrameMap::L0_opr;

LIR_Opr FrameMap::L1_opr;

LIR_Opr FrameMap::L2_opr;

LIR_Opr FrameMap::L3_opr;

LIR_Opr FrameMap::L4_opr;

LIR_Opr FrameMap::L5_opr;

LIR_Opr FrameMap::L6_opr;

LIR_Opr FrameMap::L7_opr;

LIR_Opr FrameMap::I0_opr;

LIR_Opr FrameMap::I1_opr;

LIR_Opr FrameMap::I2_opr;

LIR_Opr FrameMap::I3_opr;

LIR_Opr FrameMap::I4_opr;

LIR_Opr FrameMap::I5_opr;

LIR_Opr FrameMap::I6_opr;

LIR_Opr FrameMap::I7_opr;

LIR_Opr FrameMap::G0_oop_opr;

LIR_Opr FrameMap::G1_oop_opr;

LIR_Opr FrameMap::G2_oop_opr;

LIR_Opr FrameMap::G3_oop_opr;

LIR_Opr FrameMap::G4_oop_opr;

LIR_Opr FrameMap::G5_oop_opr;

LIR_Opr FrameMap::G6_oop_opr;

LIR_Opr FrameMap::G7_oop_opr;

LIR_Opr FrameMap::O0_oop_opr;

LIR_Opr FrameMap::O1_oop_opr;

LIR_Opr FrameMap::O2_oop_opr;

LIR_Opr FrameMap::O3_oop_opr;

LIR_Opr FrameMap::O4_oop_opr;

LIR_Opr FrameMap::O5_oop_opr;

LIR_Opr FrameMap::O6_oop_opr;

LIR_Opr FrameMap::O7_oop_opr;

LIR_Opr FrameMap::L0_oop_opr;

LIR_Opr FrameMap::L1_oop_opr;

LIR_Opr FrameMap::L2_oop_opr;

LIR_Opr FrameMap::L3_oop_opr;

LIR_Opr FrameMap::L4_oop_opr;

LIR_Opr FrameMap::L5_oop_opr;

LIR_Opr FrameMap::L6_oop_opr;

LIR_Opr FrameMap::L7_oop_opr;

LIR_Opr FrameMap::I0_oop_opr;

LIR_Opr FrameMap::I1_oop_opr;

LIR_Opr FrameMap::I2_oop_opr;

LIR_Opr FrameMap::I3_oop_opr;

LIR_Opr FrameMap::I4_oop_opr;

LIR_Opr FrameMap::I5_oop_opr;

LIR_Opr FrameMap::I6_oop_opr;

LIR_Opr FrameMap::I7_oop_opr;

LIR_Opr FrameMap::SP_opr;

LIR_Opr FrameMap::FP_opr;

LIR_Opr FrameMap::Oexception_opr;

LIR_Opr FrameMap::Oissuing_pc_opr;

LIR_Opr FrameMap::_caller_save_cpu_regs[] = { 0, };

LIR_Opr FrameMap::_caller_save_fpu_regs[] = { 0, };

FloatRegister FrameMap::nr2floatreg (int rnr) {

  assert(_init_done, "tables not initialized");

  debug_only(fpu_range_check(rnr);)

  return _fpu_regs[rnr];

}

// returns true if reg could be smashed by a callee.

bool FrameMap::is_caller_save_register (LIR_Opr reg) {

  if (reg->is_single_fpu() || reg->is_double_fpu()) { return true; }

  if (reg->is_double_cpu()) {

    return is_caller_save_register(reg->as_register_lo()) ||

           is_caller_save_register(reg->as_register_hi());

  }

  return is_caller_save_register(reg->as_register());

}

NEEDS_CLEANUP   // once the new calling convention is enabled, we no

                // longer need to treat I5, I4 and L0 specially

// Because the interpreter destroys caller's I5, I4 and L0,

// we must spill them before doing a Java call as we may land in

// interpreter.

bool FrameMap::is_caller_save_register (Register r) {

  return (r->is_global() && (r != G0)) || r->is_out();

}

void FrameMap::init () {

  if (_init_done) return;

  int i=0;

  // Register usage:

  //  O6: sp

  //  I6: fp

  //  I7: return address

  //  G0: zero

  //  G2: thread

  //  G7: not available

  //  G6: not available

  /*  0 */ map_register(i++, L0);

  /*  1 */ map_register(i++, L1);

  /*  2 */ map_register(i++, L2);

  /*  3 */ map_register(i++, L3);

  /*  4 */ map_register(i++, L4);

  /*  5 */ map_register(i++, L5);

  /*  6 */ map_register(i++, L6);

  /*  7 */ map_register(i++, L7);

  /*  8 */ map_register(i++, I0);

  /*  9 */ map_register(i++, I1);

  /* 10 */ map_register(i++, I2);

  /* 11 */ map_register(i++, I3);

  /* 12 */ map_register(i++, I4);

  /* 13 */ map_register(i++, I5);

  /* 14 */ map_register(i++, O0);

  /* 15 */ map_register(i++, O1);

  /* 16 */ map_register(i++, O2);

  /* 17 */ map_register(i++, O3);

  /* 18 */ map_register(i++, O4);

  /* 19 */ map_register(i++, O5); // <- last register visible in RegAlloc (RegAlloc::nof+cpu_regs)

  /* 20 */ map_register(i++, G1);

  /* 21 */ map_register(i++, G3);

  /* 22 */ map_register(i++, G4);

  /* 23 */ map_register(i++, G5);

  /* 24 */ map_register(i++, G0);

  // the following registers are not normally available

  /* 25 */ map_register(i++, O7);

  /* 26 */ map_register(i++, G2);

  /* 27 */ map_register(i++, O6);

  /* 28 */ map_register(i++, I6);

  /* 29 */ map_register(i++, I7);

  /* 30 */ map_register(i++, G6);

  /* 31 */ map_register(i++, G7);

  assert(i == nof_cpu_regs, "number of CPU registers");

  for (i = 0; i < nof_fpu_regs; i++) {

    _fpu_regs[i] = as_FloatRegister(i);

  }

  _init_done = true;

  in_long_opr    = as_long_opr(I0);

  out_long_opr   = as_long_opr(O0);

  G0_opr = as_opr(G0);

  G1_opr = as_opr(G1);

  G2_opr = as_opr(G2);

  G3_opr = as_opr(G3);

  G4_opr = as_opr(G4);

  G5_opr = as_opr(G5);

  G6_opr = as_opr(G6);

  G7_opr = as_opr(G7);

  O0_opr = as_opr(O0);

  O1_opr = as_opr(O1);

  O2_opr = as_opr(O2);

  O3_opr = as_opr(O3);

  O4_opr = as_opr(O4);

  O5_opr = as_opr(O5);

  O6_opr = as_opr(O6);

  O7_opr = as_opr(O7);

  L0_opr = as_opr(L0);

  L1_opr = as_opr(L1);

  L2_opr = as_opr(L2);

  L3_opr = as_opr(L3);

  L4_opr = as_opr(L4);

  L5_opr = as_opr(L5);

  L6_opr = as_opr(L6);

  L7_opr = as_opr(L7);

  I0_opr = as_opr(I0);

  I1_opr = as_opr(I1);

  I2_opr = as_opr(I2);

  I3_opr = as_opr(I3);

  I4_opr = as_opr(I4);

  I5_opr = as_opr(I5);

  I6_opr = as_opr(I6);

  I7_opr = as_opr(I7);

  G0_oop_opr = as_oop_opr(G0);

  G1_oop_opr = as_oop_opr(G1);

  G2_oop_opr = as_oop_opr(G2);

  G3_oop_opr = as_oop_opr(G3);

  G4_oop_opr = as_oop_opr(G4);

  G5_oop_opr = as_oop_opr(G5);

  G6_oop_opr = as_oop_opr(G6);

  G7_oop_opr = as_oop_opr(G7);

  O0_oop_opr = as_oop_opr(O0);

  O1_oop_opr = as_oop_opr(O1);

  O2_oop_opr = as_oop_opr(O2);

  O3_oop_opr = as_oop_opr(O3);

  O4_oop_opr = as_oop_opr(O4);

  O5_oop_opr = as_oop_opr(O5);

  O6_oop_opr = as_oop_opr(O6);

  O7_oop_opr = as_oop_opr(O7);

  L0_oop_opr = as_oop_opr(L0);

  L1_oop_opr = as_oop_opr(L1);

  L2_oop_opr = as_oop_opr(L2);

  L3_oop_opr = as_oop_opr(L3);

  L4_oop_opr = as_oop_opr(L4);

  L5_oop_opr = as_oop_opr(L5);

  L6_oop_opr = as_oop_opr(L6);

  L7_oop_opr = as_oop_opr(L7);

  I0_oop_opr = as_oop_opr(I0);

  I1_oop_opr = as_oop_opr(I1);

  I2_oop_opr = as_oop_opr(I2);

  I3_oop_opr = as_oop_opr(I3);

  I4_oop_opr = as_oop_opr(I4);

  I5_oop_opr = as_oop_opr(I5);

  I6_oop_opr = as_oop_opr(I6);

  I7_oop_opr = as_oop_opr(I7);

  FP_opr = as_pointer_opr(FP);

  SP_opr = as_pointer_opr(SP);

  F0_opr = as_float_opr(F0);

  F0_double_opr = as_double_opr(F0);

  Oexception_opr = as_oop_opr(Oexception);

  Oissuing_pc_opr = as_opr(Oissuing_pc);

  _caller_save_cpu_regs[0] = FrameMap::O0_opr;

  _caller_save_cpu_regs[1] = FrameMap::O1_opr;

  _caller_save_cpu_regs[2] = FrameMap::O2_opr;

  _caller_save_cpu_regs[3] = FrameMap::O3_opr;

  _caller_save_cpu_regs[4] = FrameMap::O4_opr;

  _caller_save_cpu_regs[5] = FrameMap::O5_opr;

  _caller_save_cpu_regs[6] = FrameMap::G1_opr;

  _caller_save_cpu_regs[7] = FrameMap::G3_opr;

  _caller_save_cpu_regs[8] = FrameMap::G4_opr;

  _caller_save_cpu_regs[9] = FrameMap::G5_opr;

  for (int i = 0; i < nof_caller_save_fpu_regs; i++) {

    _caller_save_fpu_regs[i] = LIR_OprFact::single_fpu(i);

  }

}

Address FrameMap::make_new_address(ByteSize sp_offset) const {

  return Address(SP, STACK_BIAS + in_bytes(sp_offset));

}

VMReg FrameMap::fpu_regname (int n) {

  return as_FloatRegister(n)->as_VMReg();

}

LIR_Opr FrameMap::stack_pointer() {

  return SP_opr;

}

bool FrameMap::validate_frame() {

  int max_offset = in_bytes(framesize_in_bytes());

  int java_index = 0;

  for (int i = 0; i < _incoming_arguments->length(); i++) {

    LIR_Opr opr = _incoming_arguments->at(i);

    if (opr->is_stack()) {

      max_offset = MAX2(_argument_locations->at(java_index), max_offset);

    }

    java_index += type2size[opr->type()];

  }

  return Assembler::is_simm13(max_offset + STACK_BIAS);

}