2000-03-17 23:48:54 +01:00
|
|
|
/* 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 sr REG (sr)
|
|
|
|
|
#define fpcr REG (fpcr)
|
|
|
|
|
#define fpsr REG (fpsr)
|
|
|
|
|
#define fpi REG (fpi)
|
2003-10-27 21:03:10 +01:00
|
|
|
|
|
|
|
|
/* 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__ */
|
|
|
|
|
|
