version 1.4, 1994/09/09 16:27:15
|
version 1.10, 1995/10/26 22:48:38
|
Line 1
|
Line 1
|
/* |
/* |
$Id$ |
|
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) |
|
|
#ifdef DIRECT_THREADED |
#ifdef DIRECT_THREADED |
|
|
|
#define CALL 0xe8 /* call */ |
|
#define JMP 0xe9 /* jmp */ |
|
#define GETCFA(reg) ({ asm("popl %0" : "=r" (reg)); (int)reg -= 5;}); |
|
|
/* 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) |
/* PFA1 is a special version for use just after a NEXT1 */ |
/* PFA1 is a special version for use just after a NEXT1 */ |
#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); \ |
*(char *)_cfa = 0xe9; /* jmp */ \ |
*(char *)_cfa = CALL; \ |
*(long *)(_cfa+1) = _ca-(_cfa+5);}) |
*(long *)(_cfa+1) = _ca-(_cfa+5);}) |
|
|
/* this is the point where the does code starts if label points to the |
/* this is the point where the does code starts if label points to the |
Line 53 typedef float SFloat;
|
Line 47 typedef float SFloat;
|
#define DOES_CODE1(label) DOES_CODE(label) |
#define DOES_CODE1(label) DOES_CODE(label) |
|
|
/* this stores a jump dodoes at addr */ |
/* this stores a jump dodoes at addr */ |
#define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES]) |
#define MAKE_DOES_CF(addr,doesp) ({long _addr = (long)(addr); \ |
|
long _doesp = (long)(doesp)-8; \ |
#define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8)) |
*(char *)_addr = CALL; \ |
|
*(long *)(_addr+1) = _doesp-(_addr+5);}) |
|
|
|
#define MAKE_DOES_HANDLER(addr) ({long _addr = (long)(addr); \ |
|
long _dodo = (long)symbols[DODOES]; \ |
|
*(char *)_addr = JMP; \ |
|
*(long *)(_addr+1) = _dodo-(_addr+5);}) |
#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 |
Line 66 typedef float SFloat;
|
Line 69 typedef float SFloat;
|
#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 */ |
|
#if defined(USE_TOS) && !defined(CFA_NEXT) |
|
#define IPREG asm("%ebx") |
|
#else |
|
#define SPREG asm("%ebx") |
|
#endif /* USE_TOS && !CFA_NEXT */ |
|
#endif /* gcc-version */ |
#endif /* FORCE_REG */ |
#endif /* FORCE_REG */ |
|
|
#define rint(x) floor((x)+0.5) |
|