/*

 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2016 SAP SE. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

 * questions.

 *

 */

#include "precompiled.hpp"

#include "asm/assembler.inline.hpp"

#include "compiler/disassembler.hpp"

#include "gc/shared/collectedHeap.inline.hpp"

#include "interpreter/interpreter.hpp"

#include "gc/shared/cardTableModRefBS.hpp"

#include "memory/resourceArea.hpp"

#include "prims/methodHandles.hpp"

#include "runtime/biasedLocking.hpp"

#include "runtime/objectMonitor.hpp"

#include "runtime/os.hpp"

#include "runtime/sharedRuntime.hpp"

#include "runtime/stubRoutines.hpp"

#include "utilities/macros.hpp"

#if INCLUDE_ALL_GCS

#include "gc/g1/g1BarrierSet.hpp"

#include "gc/g1/g1CollectedHeap.inline.hpp"

#include "gc/g1/heapRegion.hpp"

#endif

// Convention: Use Z_R0 and Z_R1 instead of Z_scratch_* in all

// assembler_s390.* files.

// Convert the raw encoding form into the form expected by the

// constructor for Address. This is called by adlc generated code.

Address Address::make_raw(int base, int index, int scale, int disp, relocInfo::relocType disp_reloc) {

  assert(scale == 0, "Scale should not be used on z/Architecture. The call to make_raw is "

         "generated by adlc and this must mirror all features of Operands from machnode.hpp.");

  assert(disp_reloc == relocInfo::none, "not implemented on z/Architecture.");

  Address madr(as_Register(base), as_Register(index), in_ByteSize(disp));

  return madr;

}

int AbstractAssembler::code_fill_byte() {

  return 0x00; // Illegal instruction 0x00000000.

}

// Condition code masks. Details see enum branch_condition.

// Although this method is meant for INT CCs, the Overflow/Ordered

// bit in the masks has to be considered. The CC might have been set

// by a float operation, but is evaluated while calculating an integer

// result. See elementary test TestFloat.isNotEqual(FF)Z for example.

Assembler::branch_condition Assembler::inverse_condition(Assembler::branch_condition cc) {

  Assembler::branch_condition unordered_bit = (Assembler::branch_condition)(cc & bcondNotOrdered);

  Assembler::branch_condition inverse_cc;

  // Some are commented out to avoid duplicate labels.

  switch (cc) {

    case bcondNever       : inverse_cc = bcondAlways;      break;  //  0 -> 15

    case bcondAlways      : inverse_cc = bcondNever;       break;  // 15 ->  0

    case bcondOverflow    : inverse_cc = bcondNotOverflow; break;  //  1 -> 14

    case bcondNotOverflow : inverse_cc = bcondOverflow;    break;  // 14 ->  1

    default :

      switch ((Assembler::branch_condition)(cc & bcondOrdered)) {

        case bcondEqual       : inverse_cc = bcondNotEqual;  break;  //  8 ->  6

        // case bcondZero        :

        // case bcondAllZero     :

        case bcondNotEqual    : inverse_cc = bcondEqual;     break;  //  6 ->  8

        // case bcondNotZero     :

        // case bcondMixed       :

        case bcondLow         : inverse_cc = bcondNotLow;    break;  //  4 -> 10

        // case bcondNegative    :

        case bcondNotLow      : inverse_cc = bcondLow;       break;  // 10 ->  4

        // case bcondNotNegative :

        case bcondHigh        : inverse_cc = bcondNotHigh;   break;  //  2 -> 12

        // case bcondPositive    :

        case bcondNotHigh     : inverse_cc = bcondHigh;      break;  // 12 ->  2

        // case bcondNotPositive :

        default :

          fprintf(stderr, "inverse_condition(%d)\n", (int)cc);

          fflush(stderr);

          ShouldNotReachHere();

          return bcondNever;

      }

      // If cc is even, inverse_cc must be odd.

      if (!unordered_bit) {

        inverse_cc = (Assembler::branch_condition)(inverse_cc | bcondNotOrdered);

      }

      break;

  }

  return inverse_cc;

}

Assembler::branch_condition Assembler::inverse_float_condition(Assembler::branch_condition cc) {

  Assembler::branch_condition  inverse_cc;

  switch (cc) {

    case bcondNever       : inverse_cc = bcondAlways;      break;  //  0

    case bcondAlways      : inverse_cc = bcondNever;       break;  // 15

    case bcondNotOrdered  : inverse_cc = bcondOrdered;     break;  // 14

    case bcondOrdered     : inverse_cc = bcondNotOrdered;  break;  //  1

    case bcondEqual                      : inverse_cc = (branch_condition)(bcondNotEqual + bcondNotOrdered);  break; //  8

    case bcondNotEqual + bcondNotOrdered : inverse_cc = bcondEqual;  break;                                          //  7

    case bcondLow      + bcondNotOrdered : inverse_cc = (branch_condition)(bcondHigh + bcondEqual);      break;      //  5

    case bcondNotLow                     : inverse_cc = (branch_condition)(bcondLow  + bcondNotOrdered); break;      // 10

    case bcondHigh                       : inverse_cc = (branch_condition)(bcondLow  + bcondNotOrdered + bcondEqual); break;  //  2

    case bcondNotHigh  + bcondNotOrdered : inverse_cc = bcondHigh; break;                                                     // 13

    default :

      fprintf(stderr, "inverse_float_condition(%d)\n", (int)cc);

      fflush(stderr);

      ShouldNotReachHere();

      return bcondNever;

  }

  return inverse_cc;

}

#ifdef ASSERT

void Assembler::print_dbg_msg(outputStream* out, unsigned long inst, const char* msg, int ilen) {

  out->flush();

  switch (ilen) {

    case 2:  out->print_cr("inst = %4.4x, %s",    (unsigned short)inst, msg); break;

    case 4:  out->print_cr("inst = %8.8x, %s\n",    (unsigned int)inst, msg); break;

    case 6:  out->print_cr("inst = %12.12lx, %s\n",               inst, msg); break;

    default: out->print_cr("inst = %16.16lx, %s\n",               inst, msg); break;

  }

  out->flush();

}

void Assembler::dump_code_range(outputStream* out, address pc, const unsigned int range, const char* msg) {

  out->cr();

  out->print_cr("-------------------------------");

  out->print_cr("--  %s", msg);

  out->print_cr("-------------------------------");

  out->print_cr("Hex dump    of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range);

  os::print_hex_dump(out, pc-range, pc+range, 2);

  out->cr();

  out->print_cr("Disassembly of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range);

  Disassembler::decode(pc, pc + range, out);

}

#endif