/*

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

 public:

  enum {

    first_available_sp_in_frame = 0,

    frame_pad_in_bytes = 2*wordSize      // Account for FP/LR saved at build_frame().

  };

  static LIR_Opr R0_opr;

  static LIR_Opr R1_opr;

  static LIR_Opr R2_opr;

  static LIR_Opr R3_opr;

  static LIR_Opr R4_opr;

  static LIR_Opr R5_opr;

  // add more predefined register oprs as needed

  static LIR_Opr R0_oop_opr;

  static LIR_Opr R1_oop_opr;

  static LIR_Opr R2_oop_opr;

  static LIR_Opr R3_oop_opr;

  static LIR_Opr R4_oop_opr;

  static LIR_Opr R5_oop_opr;

  static LIR_Opr R0_metadata_opr;

  static LIR_Opr R1_metadata_opr;

  static LIR_Opr R2_metadata_opr;

  static LIR_Opr R3_metadata_opr;

  static LIR_Opr R4_metadata_opr;

  static LIR_Opr R5_metadata_opr;

  static LIR_Opr LR_opr;

  static LIR_Opr LR_oop_opr;

  static LIR_Opr LR_ptr_opr;

  static LIR_Opr FP_opr;

  static LIR_Opr SP_opr;

  static LIR_Opr Rthread_opr;

  static LIR_Opr Int_result_opr;

  static LIR_Opr Long_result_opr;

  static LIR_Opr Object_result_opr;

  static LIR_Opr Float_result_opr;

  static LIR_Opr Double_result_opr;

  static LIR_Opr Exception_oop_opr;

  static LIR_Opr Exception_pc_opr;

  static LIR_Opr as_long_opr(Register r, Register r2) {

    return LIR_OprFact::double_cpu(cpu_reg2rnr(r), cpu_reg2rnr(r2));

  }

  static LIR_Opr as_pointer_opr(Register r) {

    return LIR_OprFact::single_cpu(cpu_reg2rnr(r));

  }

  static LIR_Opr as_double_opr(FloatRegister r) {

    return LIR_OprFact::double_fpu(r->encoding(), r->successor()->encoding());

  }

  static LIR_Opr as_float_opr(FloatRegister r) {

    return LIR_OprFact::single_fpu(r->encoding());

  }

  static VMReg fpu_regname(int n);

  static bool is_caller_save_register(LIR_Opr opr) {

    return true;

  }

  static int adjust_reg_range(int range) {

    // Reduce the number of available regs (to free Rheap_base) in case of compressed oops

    if (UseCompressedOops || UseCompressedClassPointers) return range - 1;

    return range;

  }

  static int nof_caller_save_cpu_regs() {

    return adjust_reg_range(pd_nof_caller_save_cpu_regs_frame_map);

  }

  static int last_cpu_reg() {

    return pd_last_cpu_reg;

  }