| /* |
/* |
| $Id$ |
|
| Copyright 1992 by the ANSI figForth Development Group |
Copyright 1992 by the ANSI figForth Development Group |
| |
|
| This is the machine-specific part for Intel 386 compatible processors |
This is the machine-specific part for Intel 386 compatible processors |
| */ |
*/ |
| |
|
| |
#include "32bit.h" |
| |
|
| /* 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 */ |
| |
|
| /* DCell and UDCell must be twice as large as Cell */ |
|
| typedef long long DCell; |
|
| typedef unsigned long long UDCell; |
|
| |
|
| /* define this if IEEE singles and doubles are available as C data types */ |
|
| #define IEEE_FP |
|
| |
|
| /* the IEEE types are used only for loading and storing */ |
|
| /* the IEEE double precision type */ |
|
| typedef double DFloat; |
|
| /* the IEEE single precision type */ |
|
| typedef float SFloat; |
|
| |
|
| /* define this if the least-significant byte is at the largets address */ |
|
| /* #define BIG_ENDIAN */ |
|
| |
|
| /* define this if the processor cannot exploit instruction-level |
/* define this if the processor cannot exploit instruction-level |
| parallelism (no pipelining or too few registers) */ |
parallelism (no pipelining or too few registers) */ |
| #define CISC_NEXT |
#define CISC_NEXT |
| |
|
| |
/* 386 and below have no cache, 486 has a shared cache, and the |
| |
Pentium probably employs hardware cache consistency, so |
| |
flush-icache is a noop */ |
| |
#define FLUSH_ICACHE(addr,size) 0 |
| |
|
| #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 */ |
| #define PFA(cfa) (((Cell *)cfa)+2) |
#define PFA(cfa) (((Cell *)cfa)+2) |
| #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); \ |
| #endif |
#endif |
| |
|
| #ifdef FORCE_REG |
#ifdef FORCE_REG |
| |
#if (__GNUC__==2 && defined(__GNUC_MINOR__) && __GNUC_MINOR__==5) |
| |
/* i.e. gcc-2.5.x */ |
| |
/* this works with 2.5.7; nothing works with 2.5.8 */ |
| #define IPREG asm("%esi") |
#define IPREG asm("%esi") |
| #define SPREG asm("%edi") |
#define SPREG asm("%edi") |
| #ifdef USE_TOS |
#ifdef USE_TOS |
| #else |
#else |
| #define CFAREG asm("%edx") |
#define CFAREG asm("%edx") |
| #endif |
#endif |
| |
#else /* gcc-version */ |
| |
/* this works with 2.6.3 (and quite well, too) */ |
| |
/* since this is not very demanding, it's the default for other gcc versions */ |
| |
#define SPREG asm("%ebx") |
| |
#endif /* gcc-version */ |
| #endif /* FORCE_REG */ |
#endif /* FORCE_REG */ |
| |
|
| #define rint(x) floor((x)+0.5) |
|
