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Annotation of gforth/sparc.h, revision 1.1

1.1     ! anton       1: /*
        !             2:   $Id: sparc.h,v 1.2 1993/02/11 15:57:33 anton Exp $
        !             3:   Copyright 1992 by the ANSI figForth Development Group
        !             4: 
        !             5:   This is the machine-specific part for a SPARC running SunOS
        !             6: */
        !             7: 
        !             8: 
        !             9: /* Cell and UCell must be the same size as a pointer */
        !            10: typedef long Cell;
        !            11: typedef unsigned long UCell;
        !            12: 
        !            13: /* DCell and UDCell must be twice as large as Cell */
        !            14: typedef long long DCell;
        !            15: typedef unsigned long long UDCell;
        !            16: 
        !            17: /* define this if IEEE singles and doubles are available as C data types */
        !            18: #define IEEE_FP
        !            19: 
        !            20: /* the IEEE types are used only for loading and storing */
        !            21: /* the IEEE double precision type */
        !            22: typedef double DFloat;
        !            23: /* the IEEE single precision type */
        !            24: typedef float SFloat;
        !            25: 
        !            26: /* define this if the least-significant byte is at the largets address */
        !            27: #define BIG_ENDIAN
        !            28: 
        !            29: #ifdef DIRECT_THREADED
        !            30: /* PFA gives the parameter field address corresponding to a cfa */
        !            31: #define PFA(cfa)       (((Cell *)cfa)+2)
        !            32: /* PFA1 is a special version for use just after a NEXT1 */
        !            33: /* the improvement here is that we may destroy cfa before using PFA1 */
        !            34: #define PFA1(cfa)      /* PFA(cfa) */ \
        !            35:                        ({register Cell *pfa asm("%15"); \
        !            36:                          pfa+2; })
        !            37: /* CODE_ADDRESS is the address of the code jumped to through the code field */
        !            38: #define CODE_ADDRESS(cfa)      ((Label)((*(unsigned *)(cfa))<<2))
        !            39: /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */
        !            40: /* we use call, since 'branch always' only has 22 bits displacement */
        !            41: #define MAKE_CF(cfa,ca)        ({long *_cfa        = (long *)(cfa); \
        !            42:                          unsigned _ca = (unsigned)(ca); \
        !            43:                          _cfa[0] = 0x8000000|((_ca+4-(unsigned)_cfa)>>2) /* CALL ca */ \
        !            44:                          _cfa[1] = *(long *)_ca; /* delay slot */})
        !            45: #endif
        !            46: 
        !            47: /* this is the point where the does code starts if label points to the
        !            48:  * jump dodoes */
        !            49: #define DOES_CODE(label)       (((Xt *)(label))+2)
        !            50: 
        !            51: /* this is a special version of DOES_CODE for use in dodoes */
        !            52: #define DOES_CODE1(label)      ({register Xt *_does_code asm("%15"); \
        !            53:                                _does_code+2; })
        !            54: 
        !            55: /* this stores a call dodoes at addr */
        !            56: #define MAKE_DOESJUMP(addr)    ({long *_addr = (long *)(addr); \
        !            57:                                  _addr[0] = 0x8000000|((((unsigned)&&dodoes)+4-((unsigned)_addr))>>2) /* CALL dodoes */ \
        !            58:                          _addr[1] = *(long *)&&dodoes; /* delay slot */})
        !            59: 
        !            60: /* OS dependences */
        !            61: 
        !            62: #define SEEK_SET 0