compiler.h

/*
  compiler.h

  (C) 2018 Henryk Richter <henryk.richter@gmx.net>

  Interface macros for ASM subroutines for VBCC, GCC and SAS/C

  syntax:
   ASM SAVEDS int some_asm_subroutine(   
                         ASMR(d3) unsigned int   some_data    ASMREG(d3),
                         ASMR(a0) unsigned char *some_address ASMREG(a0) 
			             );

  Reason for the double spec of An/Dn: some compilers (SAS) require the register
  on the left hand side, gcc on the right hand side. I wanted to avoid a big macro
  for the whole argument and moved the stuff into two macros per argument.

*/
#ifndef _INC_ASMINTERFACE_H
#define _INC_ASMINTERFACE_H

#ifdef __SASC

#define ASM __asm
#define ASMR(x) register __ ## x 
#define ASMREG(x) 
#define SAVEDS __saveds
#define STRUCTOFFSET OFFSET /* exec/initializers.h */
#define INLINE __inline static

#else /* __SASC */

#ifdef __GNUC__

#define ASM
#define ASMR(x) register
#define ASMREG(x) __asm("" #x "")
//#define SAVEDS __saveds
#define SAVEDS
#define STRUCTOFFSET OFFSET /* exec/initializers.h */
#define INLINE static inline 

#else /* __GNUC__ */

#ifdef __VBCC__

#define ASM
#define ASMR(x) __reg("" #x "")
#define ASMREG(x)
#define SAVEDS __saveds
#define STRUCTOFFSET(_a_,_b_) offsetof(struct _a_, _b_) /* stddef.h */
#include <stddef.h>
/* sorry, I ran into some issues inlining stuff with VBCC, disabling it */
#define INLINE 

#else /* __VBCC__ */

#error "Compiler not supported yet in compiler.h"

#endif /* __VBCC__ */
#endif /* __GNUC__ */
#endif /* __SASC */


#endif /* _INC_ASMINTERFACE_H */