/*

 * 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 "runtime/stackValueCollection.hpp"

jint StackValueCollection::int_at(int slot) const {

  intptr_t val =  at(slot)->get_int();

  jint ival = *((jint*) (&val));

  return ival;

}

jlong StackValueCollection::long_at(int slot) const {

#ifdef _LP64

  return at(slot+1)->get_int();

#else

  union {

    jlong jl;

    jint  array[2];

  } value;

  // Interpreter stack is reversed in memory:

  // low memory location is in higher java local slot.

  value.array[0] = at(slot+1)->get_int();

  value.array[1] = at(slot  )->get_int();

  return value.jl;

#endif

}

Handle StackValueCollection::obj_at(int slot) const {

  return at(slot)->get_obj();

}

jfloat StackValueCollection::float_at(int slot) const {

  intptr_t res = at(slot)->get_int();

  return *((jfloat*) (&res));

}

jdouble StackValueCollection::double_at(int slot) const {

#ifdef _LP64

  intptr_t res = at(slot+1)->get_int();

  return *((jdouble*) (&res));

#else

  union {

    jdouble jd;

    jint    array[2];

  } value;

  // Interpreter stack is reversed in memory:

  // low memory location is in higher java local slot.

  value.array[0] = at(slot+1)->get_int();

  value.array[1] = at(slot  )->get_int();

  return value.jd;

#endif

}

void StackValueCollection::set_int_at(int slot, jint value) {

  intptr_t val;

  *((jint*) (&val)) = value;

  at(slot)->set_int(val);

}

void StackValueCollection::set_long_at(int slot, jlong value) {

#ifdef _LP64

  at(slot+1)->set_int(value);

#else

  union {

    jlong jl;

    jint  array[2];

  } x;

  // Interpreter stack is reversed in memory:

  // low memory location is in higher java local slot.

  x.jl = value;

  at(slot+1)->set_int(x.array[0]);

  at(slot+0)->set_int(x.array[1]);

#endif

}

void StackValueCollection::set_obj_at(int slot, Handle value) {

  at(slot)->set_obj(value);

}

void StackValueCollection::set_float_at(int slot, jfloat value) {

#ifdef _LP64

  union {

    intptr_t jd;

    jint    array[2];

  } val;

  // Interpreter stores 32 bit floats in first half of 64 bit word.

  val.array[0] = *(jint*)(&value);

  val.array[1] = 0;

  at(slot)->set_int(val.jd);

#else

  at(slot)->set_int(*(jint*)(&value));

#endif

}

void StackValueCollection::set_double_at(int slot, jdouble value) {

#ifdef _LP64

  at(slot+1)->set_int(*(intptr_t*)(&value));

#else

  union {

    jdouble jd;

    jint    array[2];

  } x;

  // Interpreter stack is reversed in memory:

  // low memory location is in higher java local slot.

  x.jd = value;

  at(slot+1)->set_int(x.array[0]);

  at(slot+0)->set_int(x.array[1]);

#endif

}

#ifndef PRODUCT

void StackValueCollection::print() {

  for(int index = 0; index < size(); index++) {

    tty->print("\t  %2d ", index);

    at(index)->print_on(tty);

    if( at(index  )->type() == T_INT &&

        index+1 < size() &&

        at(index+1)->type() == T_INT ) {

      tty->cr();

      tty->print("\t     %.15e (double)", double_at(index));

    }

    tty->cr();

  }

}

#endif