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| 1 : | anton | 1.1 | /* |
| 2 : | $Id: 386.h,v 1.2 1993/07/08 08:52:26 benschop Exp $ | ||
| 3 : | Copyright 1992 by the ANSI figForth Development Group | ||
| 4 : | |||
| 5 : | This is the machine-specific part for Intel 386 compatible processors | ||
| 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 : | #define PFA1(cfa) PFA(cfa) | ||
| 34 : | /* CODE_ADDRESS is the address of the code jumped to through the code field */ | ||
| 35 : | #define CODE_ADDRESS(cfa) ({long _cfa = (char *)(cfa); (Label)(_cfa+*((long *)(_cfa+1))-5);}) | ||
| 36 : | /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ | ||
| 37 : | #define MAKE_CF(cfa,ca) ({long _cfa = (long *)(cfa); \ | ||
| 38 : | *(char *)_cfa = 0xe9; /* jmp */ \ | ||
| 39 : | *(long *)(_cfa+1) = ((long)(ca))-(_cfa+5);}) | ||
| 40 : | |||
| 41 : | /* this is the point where the does code starts if label points to the | ||
| 42 : | * jump dodoes */ | ||
| 43 : | #define DOES_CODE(label) ((Xt *)(((char *)label)+8)) | ||
| 44 : | |||
| 45 : | /* this is a special version of DOES_CODE for use in dodoes */ | ||
| 46 : | #define DOES_CODE1(label) DOES_CODE(label) | ||
| 47 : | |||
| 48 : | /* this stores a jump dodoes at addr */ | ||
| 49 : | #define MAKE_DOESJUMP(addr) ({long _addr = (long *)(addr); \ | ||
| 50 : | *(char *)_addr = 0xe9; /* jmp */ \ | ||
| 51 : | *(long *)(_addr+1) = ((long)(&&dodoes))-(_addr+5);}) | ||
| 52 : | #endif | ||
| 53 : |
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