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| 1 : | anton | 1.1 | /* |
| 2 : | Copyright 1992 by the ANSI figForth Development Group | ||
| 3 : | |||
| 4 : | This is the machine-specific part for Intel 386 compatible processors | ||
| 5 : | */ | ||
| 6 : | |||
| 7 : | anton | 1.7 | #include "32bit.h" |
| 8 : | anton | 1.1 | |
| 9 : | anton | 1.7 | /* indirect threading is faster on the 486, on the 386 direct |
| 10 : | threading is probably faster. Therefore we leave defining | ||
| 11 : | DIRECT_THREADED to configure */ | ||
| 12 : | anton | 1.1 | |
| 13 : | anton | 1.3 | /* define this if the processor cannot exploit instruction-level |
| 14 : | anton | 1.4 | parallelism (no pipelining or too few registers) */ |
| 15 : | anton | 1.3 | #define CISC_NEXT |
| 16 : | |||
| 17 : | anton | 1.1 | #ifdef DIRECT_THREADED |
| 18 : | /* PFA gives the parameter field address corresponding to a cfa */ | ||
| 19 : | #define PFA(cfa) (((Cell *)cfa)+2) | ||
| 20 : | /* PFA1 is a special version for use just after a NEXT1 */ | ||
| 21 : | #define PFA1(cfa) PFA(cfa) | ||
| 22 : | /* CODE_ADDRESS is the address of the code jumped to through the code field */ | ||
| 23 : | pazsan | 1.2 | #define CODE_ADDRESS(cfa) \ |
| 24 : | anton | 1.5 | ({long _cfa = (long)(cfa); (Label)(_cfa+*((long *)(_cfa+1))+5);}) |
| 25 : | anton | 1.1 | /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ |
| 26 : | pazsan | 1.2 | #define MAKE_CF(cfa,ca) ({long _cfa = (long)(cfa); \ |
| 27 : | long _ca = (long)(ca); \ | ||
| 28 : | anton | 1.1 | *(char *)_cfa = 0xe9; /* jmp */ \ |
| 29 : | pazsan | 1.2 | *(long *)(_cfa+1) = _ca-(_cfa+5);}) |
| 30 : | anton | 1.1 | |
| 31 : | /* this is the point where the does code starts if label points to the | ||
| 32 : | * jump dodoes */ | ||
| 33 : | pazsan | 1.2 | #define DOES_HANDLER_SIZE 8 |
| 34 : | #define DOES_CODE(label) ((Xt *)(CODE_ADDRESS(label)+DOES_HANDLER_SIZE)) | ||
| 35 : | anton | 1.1 | |
| 36 : | /* this is a special version of DOES_CODE for use in dodoes */ | ||
| 37 : | #define DOES_CODE1(label) DOES_CODE(label) | ||
| 38 : | |||
| 39 : | /* this stores a jump dodoes at addr */ | ||
| 40 : | pazsan | 1.2 | #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES]) |
| 41 : | |||
| 42 : | #define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8)) | ||
| 43 : | anton | 1.1 | #endif |
| 44 : | anton | 1.4 | |
| 45 : | #ifdef FORCE_REG | ||
| 46 : | #define IPREG asm("%esi") | ||
| 47 : | #define SPREG asm("%edi") | ||
| 48 : | #ifdef USE_TOS | ||
| 49 : | #define CFAREG asm("%ecx") | ||
| 50 : | #else | ||
| 51 : | #define CFAREG asm("%edx") | ||
| 52 : | #endif | ||
| 53 : | #endif /* FORCE_REG */ |
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