version 1.2, 1994/05/18 17:32:59
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version 1.9, 1995/10/11 19:39:31
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/* |
/* |
$Id$ |
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Copyright 1992 by the ANSI figForth Development Group |
Copyright 1992 by the ANSI figForth Development Group |
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This is the machine-specific part for Intel 386 compatible processors |
This is the machine-specific part for Intel 386 compatible processors |
*/ |
*/ |
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#include "32bit.h" |
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/* Cell and UCell must be the same size as a pointer */ |
/* indirect threading is faster on the 486, on the 386 direct |
typedef long Cell; |
threading is probably faster. Therefore we leave defining |
typedef unsigned long UCell; |
DIRECT_THREADED to configure */ |
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/* DCell and UDCell must be twice as large as Cell */ |
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typedef long long DCell; |
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typedef unsigned long long UDCell; |
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/* define this if IEEE singles and doubles are available as C data types */ |
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#define IEEE_FP |
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/* the IEEE types are used only for loading and storing */ |
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/* the IEEE double precision type */ |
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typedef double DFloat; |
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/* the IEEE single precision type */ |
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typedef float SFloat; |
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/* define this if the least-significant byte is at the largets address */ |
/* define this if the processor cannot exploit instruction-level |
/* #define BIG_ENDIAN */ |
parallelism (no pipelining or too few registers) */ |
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#define CISC_NEXT |
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/* 386 and below have no cache, 486 has a shared cache, and the |
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Pentium probably employs hardware cache consistency, so |
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flush-icache is a noop */ |
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#define FLUSH_ICACHE(addr,size) 0 |
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#ifdef DIRECT_THREADED |
#ifdef DIRECT_THREADED |
/* PFA gives the parameter field address corresponding to a cfa */ |
/* PFA gives the parameter field address corresponding to a cfa */ |
Line 33 typedef float SFloat;
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Line 26 typedef float SFloat;
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#define PFA1(cfa) PFA(cfa) |
#define PFA1(cfa) PFA(cfa) |
/* CODE_ADDRESS is the address of the code jumped to through the code field */ |
/* CODE_ADDRESS is the address of the code jumped to through the code field */ |
#define CODE_ADDRESS(cfa) \ |
#define CODE_ADDRESS(cfa) \ |
({long _cfa = (char *)(cfa); (Label)(_cfa+*((long *)(_cfa+1))+5);}) |
({long _cfa = (long)(cfa); (Label)(_cfa+*((long *)(_cfa+1))+5);}) |
/* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ |
/* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ |
#define MAKE_CF(cfa,ca) ({long _cfa = (long)(cfa); \ |
#define MAKE_CF(cfa,ca) ({long _cfa = (long)(cfa); \ |
long _ca = (long)(ca); \ |
long _ca = (long)(ca); \ |
Line 54 typedef float SFloat;
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Line 47 typedef float SFloat;
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#define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8)) |
#define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8)) |
#endif |
#endif |
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#define rint(x) floor((x)+0.5) |
#ifdef FORCE_REG |
/* |
#if (__GNUC__==2 && defined(__GNUC_MINOR__) && __GNUC_MINOR__==5) |
#define CISC_NEXT |
/* i.e. gcc-2.5.x */ |
*/ |
/* this works with 2.5.7; nothing works with 2.5.8 */ |
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#define IPREG asm("%esi") |
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#define SPREG asm("%edi") |
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#ifdef USE_TOS |
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#define CFAREG asm("%ecx") |
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#else |
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#define CFAREG asm("%edx") |
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#endif |
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#else /* gcc-version */ |
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/* this works with 2.6.3 (and quite well, too) */ |
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/* since this is not very demanding, it's the default for other gcc versions */ |
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#define SPREG asm("%ebx") |
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#endif /* gcc-version */ |
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#endif /* FORCE_REG */ |