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/////////////////////////////////////////////////////////////////////////

// $Id: stack.h 11106 2012-03-25 11:54:32Z sshwarts $

/////////////////////////////////////////////////////////////////////////

//

//   Copyright (c) 2007-2012 Stanislav Shwartsman

//          Written by Stanislav Shwartsman [sshwarts at sourceforge net]

//

//  This library is free software; you can redistribute it and/or

//  modify it under the terms of the GNU Lesser General Public

//  License as published by the Free Software Foundation; either

//  version 2 of the License, or (at your option) any later version.

//

//  This library 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

//  Lesser General Public License for more details.

//

//  You should have received a copy of the GNU Lesser General Public

//  License along with this library; if not, write to the Free Software

//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA

//

/////////////////////////////////////////////////////////////////////////

#ifndef BX_PUSHPOP_H

#define BX_PUSHPOP_H

  BX_CPP_INLINE void BX_CPP_AttrRegparmN(1)

BX_CPU_C::push_16(Bit16u value16)

{

#if BX_SUPPORT_X86_64

  if (long64_mode()) { /* StackAddrSize = 64 */

    stack_write_word(RSP-2, value16);

    RSP -= 2;

  }

  else

#endif

  if (BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache.u.segment.d_b) { /* StackAddrSize = 32 */

    stack_write_word((Bit32u) (ESP-2), value16);

    ESP -= 2;

  }

  else /* StackAddrSize = 16 */

  {

    stack_write_word((Bit16u) (SP-2), value16);

    SP -= 2;

  }

}

  BX_CPP_INLINE void BX_CPP_AttrRegparmN(1)

BX_CPU_C::push_32(Bit32u value32)

{

#if BX_SUPPORT_X86_64

  if (long64_mode()) { /* StackAddrSize = 64 */

    stack_write_dword(RSP-4, value32);

    RSP -= 4;

  }

  else

#endif

  if (BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache.u.segment.d_b) { /* StackAddrSize = 32 */

    stack_write_dword((Bit32u) (ESP-4), value32);

    ESP -= 4;

  }

  else /* StackAddrSize = 16 */

  {

    stack_write_dword((Bit16u) (SP-4), value32);

    SP -= 4;

  }

}

/* push 64 bit operand */

#if BX_SUPPORT_X86_64

  BX_CPP_INLINE void BX_CPP_AttrRegparmN(1)

BX_CPU_C::push_64(Bit64u value64)

{

  /* StackAddrSize = 64 */

  stack_write_qword(RSP-8, value64);

  RSP -= 8;

}

#endif

/* pop 16 bit operand from the stack */

BX_CPP_INLINE Bit16u BX_CPU_C::pop_16(void)

{

  Bit16u value16;

#if BX_SUPPORT_X86_64

  if (long64_mode()) { /* StackAddrSize = 64 */

    value16 = stack_read_word(RSP);

    RSP += 2;

  }

  else

#endif

  if (BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache.u.segment.d_b) { /* StackAddrSize = 32 */

    value16 = stack_read_word(ESP);

    ESP += 2;

  }

  else { /* StackAddrSize = 16 */

    value16 = stack_read_word(SP);

    SP += 2;

  }

  return value16;

}

/* pop 32 bit operand from the stack */

BX_CPP_INLINE Bit32u BX_CPU_C::pop_32(void)

{

  Bit32u value32;

#if BX_SUPPORT_X86_64

  if (long64_mode()) { /* StackAddrSize = 64 */

    value32 = stack_read_dword(RSP);

    RSP += 4;

  }

  else

#endif

  if (BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache.u.segment.d_b) { /* StackAddrSize = 32 */

    value32 = stack_read_dword(ESP);

    ESP += 4;

  }

  else { /* StackAddrSize = 16 */

    value32 = stack_read_dword(SP);

    SP += 4;

  }

  return value32;

}

/* pop 64 bit operand from the stack */

#if BX_SUPPORT_X86_64

BX_CPP_INLINE Bit64u BX_CPU_C::pop_64(void)

{

  /* StackAddrSize = 64 */

  Bit64u value64 = stack_read_qword(RSP);

  RSP += 8;

  return value64;

}

#endif // BX_SUPPORT_X86_64

#endif