/*

 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. 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.hpp"

#include "asm/assembler.inline.hpp"

#include "ci/ciEnv.hpp"

#include "gc/shared/cardTableModRefBS.hpp"

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

#include "interpreter/interpreter.hpp"

#include "interpreter/interpreterRuntime.hpp"

#include "interpreter/templateInterpreterGenerator.hpp"

#include "memory/resourceArea.hpp"

#include "prims/jvm_misc.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/hashtable.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 // INCLUDE_ALL_GCS

#ifdef COMPILER2

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

// constructor for Address.

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

  RelocationHolder rspec;

  if (disp_reloc != relocInfo::none) {

    rspec = Relocation::spec_simple(disp_reloc);

  }

  Register rindex = as_Register(index);

  if (rindex != PC) {

    assert(disp == 0, "unsupported");

    Address madr(as_Register(base), rindex, lsl, scale);

    madr._rspec = rspec;

    return madr;

  } else {

    assert(scale == 0, "not supported");

    Address madr(as_Register(base), disp);

    madr._rspec = rspec;

    return madr;

  }

}

#endif

void AsmOperand::initialize_rotated_imm(unsigned int imm) {

  for (int shift = 2; shift <= 24; shift += 2) {

    if ((imm & ~(0xff << shift)) == 0) {

      _encoding = 1 << 25 | (32 - shift) << 7 | imm >> shift;

      return;

    }

  }

  assert((imm & 0x0ffffff0) == 0, "too complicated constant: %d (%x)", imm, imm);

  _encoding = 1 << 25 | 4 << 7 | imm >> 28 | imm << 4;

}

bool AsmOperand::is_rotated_imm(unsigned int imm) {

  if ((imm >> 8) == 0) {

    return true;

  }

  for (int shift = 2; shift <= 24; shift += 2) {

    if ((imm & ~(0xff << shift)) == 0) {

      return true;

    }

  }

  if ((imm & 0x0ffffff0) == 0) {

    return true;

  }

  return false;

}