text: /*
   *  dyngen defines for micro operation code
   *
   *  Copyright (c) 2003 Fabrice Bellard
   *
   * 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, see <http://www.gnu.org/licenses/>.
   */
  #if !defined(__DYNGEN_EXEC_H__)
  #define __DYNGEN_EXEC_H__
  
  #if defined(CONFIG_TCG_INTERPRETER)
  /* The TCG interpreter does not need a special register AREG0,
   * but it is possible to use one by defining AREG0.
   * On i386, register edi seems to work. */
  /* Run without special register AREG0 or use a value defined elsewhere. */
  #elif defined(__i386__)
  #define AREG0 "ebp"
  #elif defined(__x86_64__)
  #define AREG0 "r14"
  #elif defined(_ARCH_PPC)
  #define AREG0 "r27"
  #elif defined(__arm__)
  #define AREG0 "r7"
  #elif defined(__hppa__)
  #define AREG0 "r17"
  #elif defined(__mips__)
  #define AREG0 "s0"
  #elif defined(__sparc__)
  #ifdef CONFIG_SOLARIS
  #define AREG0 "g2"
  #else
  #ifdef __sparc_v9__
  #define AREG0 "g5"
  #else
  #define AREG0 "g6"
  #endif
  #endif
  #elif defined(__s390__)
  #define AREG0 "r10"
  #elif defined(__alpha__)
  /* Note $15 is the frame pointer, so anything in op-i386.c that would
     require a frame pointer, like alloca, would probably loose.  */
  #define AREG0 "$15"
  #elif defined(__mc68000)
  #define AREG0 "%a5"
  #elif defined(__ia64__)
  #define AREG0 "r7"
  #else
  #error unsupported CPU
  #endif
  
  #if defined(AREG0)
  register CPUState *env asm(AREG0);
  #else
  /* TODO: Try env = cpu_single_env. */
  extern CPUState *env;
  #endif
  
  #endif /* !defined(__DYNGEN_EXEC_H__) */
  