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#ifndef _BITS_COMPILER_H
#define _BITS_COMPILER_H
FILE_LICENCE ( GPL2_OR_LATER );
#ifndef ASSEMBLY
/** Declare a function with standard calling conventions */
#define __asmcall __attribute__ (( cdecl, regparm(0) ))
/**
* Declare a function with libgcc implicit linkage
*
* It seems as though gcc expects its implicit arithmetic functions to
* be cdecl, even if -mrtd is specified. This is somewhat
* inconsistent; for example, if -mregparm=3 is used then the implicit
* functions do become regparm(3).
*
* The implicit calls to memcpy() and memset() which gcc can generate
* do not seem to have this inconsistency; -mregparm and -mrtd affect
* them in the same way as any other function.
*
* Update (25/4/14): it appears that more recent gcc versions do allow
* -mrtd to affect calls to the implicit arithmetic functions. There
* is nothing obvious in the gcc changelogs to indicate precisely when
* this happened. From experimentation with available gcc versions,
* the change occurred sometime between v4.6.3 and v4.7.2. We assume
* that only versions up to v4.6.x require the special treatment.
*/
#if ( __GNUC__ < 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ <= 6 ) )
#define __libgcc __attribute__ (( cdecl ))
#else
#define __libgcc
#endif
#endif /* ASSEMBLY */
#endif /* _BITS_COMPILER_H */
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