asm.h

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*  asm.h
 *
 *  This include file attempts to address the problems
 *  caused by incompatible flavors of assemblers and
 *  toolsets.  It primarily addresses variations in the
 *  use of leading underscores on symbols and the requirement
 *  that register names be preceded by a %.
 *
 *  Authors: Ralf Corsepius ([e-mail]) and
 *           Bernd Becker ([e-mail])
 *
 *  NOTE: The spacing in the use of these macros
 *        is critical to them working as advertised.
 *
 *  COPYRIGHT:
 *
 *  This file is based on similar code found in newlib available
 *  from ftp.cygnus.com.  The file which was used had no copyright
 *  notice.  This file is freely distributable as long as the source
 *  of the file is noted.  This file is:
 *
 *
 *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
 *
 *  This program 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.
 *
 *
 *  COPYRIGHT (c) 1998-2001.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: asm.h,v 1.5.2.1 2003/09/04 18:47:39 joel Exp $
 */

#ifndef __CPU_SH_ASM_h
#define __CPU_SH_ASM_h

/*
 *  Indicate we are in an assembly file and get the basic CPU definitions.
 */

#ifndef ASM
#define ASM
#endif

#include <rtems/score/cpuopts.h>
#include <rtems/score/sh.h>

/*
 *  Recent versions of GNU cpp define variables which indicate the
 *  need for underscores and percents.  If not using GNU cpp or
 *  the version does not support this, then you will obviously
 *  have to define these as appropriate.
 */

#ifndef __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__ _
#endif

#ifndef __REGISTER_PREFIX__
#define __REGISTER_PREFIX__
#endif

/* ANSI concatenation macros.  */

#define CONCAT1(a, b) CONCAT2(a, b)
#define CONCAT2(a, b) a ## b

/* Use the right prefix for global labels.  */

#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)

/* Use the right prefix for registers.  */

#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)

/*
 *  define macros for all of the registers on this CPU
 *
 *  EXAMPLE:     #define d0 REG (d0)
 */
#define r0 REG (r0)
#define r1 REG (r1)
#define r2 REG (r2)
#define r3 REG (r3)
#define r4 REG (r4)
#define r5 REG (r5)
#define r6 REG (r6)
#define r7 REG (r7)
#define r8 REG (r8)
#define r9 REG (r9)
#define r10 REG (r10)
#define r11 REG (r11)
#define r12 REG (r12)
#define r13 REG (r13)
#define r14 REG (r14)
#define r15 REG (r15)
#define vbr REG (vbr)
#define gbr REG (gbr)
#define pr REG (pr)
#define mach REG (mach)
#define macl REG (macl)
#define sr REG (sr)
#define pc REG (pc)

/*
 *  Define macros to handle section beginning and ends.
 */


#define BEGIN_CODE_DCL .text
#define END_CODE_DCL
#define BEGIN_DATA_DCL .data
#define END_DATA_DCL
#define BEGIN_CODE .text
#define END_CODE
#define BEGIN_DATA
#define END_DATA
#define BEGIN_BSS
#define END_BSS
#define END

/*
 *  Following must be tailor for a particular flavor of the C compiler.
 *  They may need to put underscores in front of the symbols.
 */

#define PUBLIC(sym) .global SYM (sym)
#define EXTERN(sym) .global SYM (sym)

#endif