Subversion Repositories openrisc_2011-10-31

/* asm.h -- macros for m68k asm

 *

 * Copyright (c) 1995, 1996 Cygnus Support

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

#if 0

/*

 * XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0-3

 * XXX The following ifdef magic fixes the problem but results in a warning

 * XXX when compiling assembly code.

 */

#ifndef __USER_LABEL_PREFIX__

/* #define __USER_LABEL_PREFIX__ ""     /* no underscore for coff */

#define __USER_LABEL_PREFIX__ _         /* leading underscore for aout */

#endif

#ifndef __REGISTER_PREFIX__

#define __REGISTER_PREFIX__             /* never has anything prefixed */

#endif

#endif

/*

 * some assemblers choke on '#' as an immediate value. As gcc can also

 * use '&', use that in those cases.

 */

#ifndef __IMMEDIATE_PREFIX__

#define __IMMEDIATE_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)

/* use the right prefix for immediate values.  */

#define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__,x)

/* use the right prefix for register names */

#define d0 REG (d0)

#define d1 REG (d1)

#define d2 REG (d2)

#define d3 REG (d3)

#define d4 REG (d4)

#define d5 REG (d5)

#define d6 REG (d6)

#define d7 REG (d7)

#define a0 REG (a0)

#define a1 REG (a1)

#define a2 REG (a2)

#define a3 REG (a3)

#define a4 REG (a4)

#define a5 REG (a5)

#define a6 REG (a6)

#define a7 REG (a7)

#define fp REG (fp)

#define fp0 REG (fp0)

#define fp1 REG (fp1)

#define fp2 REG (fp2)

#define fp3 REG (fp3)

#define fp4 REG (fp4)

#define fp5 REG (fp5)

#define fp6 REG (fp6)

#define fp7 REG (fp7)

#define sp REG (sp)

#define usp REG (usp)

#define vbr REG (vbr)

#define mbb REG (mbb)

#define sr REG (sr)

#define fpcr REG (fpcr)

#define fpsr REG (fpsr)

#define fpi REG (fpi)

/* Provide a few macros to allow for PIC code support.

 * With PIC, data is stored A5 relative so we've got to take a bit of special

 * care to ensure that all loads of global data is via A5.  PIC also requires

 * jumps and subroutine calls to be PC relative rather than absolute.  We cheat

 * a little on this and in the PIC case, we use short offset branches and

 * hope that the final object code is within range (which it should be).

 */

#ifndef __PIC__

        /* Non PIC (absolute/relocatable) versions */

        .macro PICCALL addr

        jbsr    \addr

        .endm

        .macro PICJUMP addr

        jmp     \addr

        .endm

        .macro PICLEA sym, reg

        lea     \sym, \reg

        .endm

        .macro PICPEA sym, areg

        pea     \sym

        .endm

#else /* __PIC__ */

        /* Common for -mid-shared-libary and -msep-data */

        .macro PICCALL addr

        bsr     \addr

        .endm

        .macro PICJUMP addr

        bra     \addr

        .endm

# if defined(__ID_SHARED_LIBRARY__)

        /* -mid-shared-library versions  */

        .macro PICLEA sym, reg

        movel   a5@(_current_shared_library_a5_offset_), \reg

        movel   \sym@GOT(\reg), \reg

        .endm

        .macro PICPEA sym, areg

        movel   a5@(_current_shared_library_a5_offset_), \areg

        movel   \sym@GOT(\areg), sp@-

        .endm

# else /* !__ID_SHARED_LIBRARY__ */

        /* Versions for -msep-data */

        .macro PICLEA sym, reg

        movel   \sym@GOT(a5), \reg

        .endm

        .macro PICPEA sym, areg

        movel   \sym@GOT(a5), sp@-

        .endm

# endif /* !__ID_SHARED_LIBRARY__ */

#endif /* __PIC__ */