version 1.21, 1994/12/15 12:35:14
|
version 1.40, 1997/02/16 20:51:07
|
Line 1
|
Line 1
|
/* |
/* Gforth virtual machine (aka inner interpreter) |
Copyright 1992 by the ANSI figForth Development Group |
|
|
Copyright (C) 1995 Free Software Foundation, Inc. |
|
|
|
This file is part of Gforth. |
|
|
|
Gforth is free software; you can redistribute it and/or |
|
modify it under the terms of the GNU General Public License |
|
as published by the Free Software Foundation; either version 2 |
|
of the License, or (at your option) any later version. |
|
|
|
This program is distributed in the hope that it will be useful, |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
GNU General Public License for more details. |
|
|
|
You should have received a copy of the GNU General Public License |
|
along with this program; if not, write to the Free Software |
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
*/ |
*/ |
|
|
|
#include "config.h" |
#include <ctype.h> |
#include <ctype.h> |
#include <stdio.h> |
#include <stdio.h> |
#include <string.h> |
#include <string.h> |
Line 13
|
Line 31
|
#include <stdlib.h> |
#include <stdlib.h> |
#include <time.h> |
#include <time.h> |
#include <sys/time.h> |
#include <sys/time.h> |
|
#include <unistd.h> |
|
#include <errno.h> |
|
#include <pwd.h> |
#include "forth.h" |
#include "forth.h" |
#include "io.h" |
#include "io.h" |
|
#include "threading.h" |
|
|
#ifndef SEEK_SET |
#ifndef SEEK_SET |
/* should be defined in stdio.h, but some systems don't have it */ |
/* should be defined in stdio.h, but some systems don't have it */ |
#define SEEK_SET 0 |
#define SEEK_SET 0 |
#endif |
#endif |
|
|
typedef union { |
#define IOR(flag) ((flag)? -512-errno : 0) |
struct { |
|
#ifdef WORDS_BIGENDIAN |
|
Cell high; |
|
Cell low; |
|
#else |
|
Cell low; |
|
Cell high; |
|
#endif; |
|
} cells; |
|
DCell dcell; |
|
} Double_Store; |
|
|
|
typedef struct F83Name { |
typedef struct F83Name { |
struct F83Name *next; /* the link field for old hands */ |
struct F83Name *next; /* the link field for old hands */ |
Line 45 typedef struct F83Name {
|
Line 56 typedef struct F83Name {
|
#define F83NAME_SMUDGE(np) (((np)->countetc & 0x40) != 0) |
#define F83NAME_SMUDGE(np) (((np)->countetc & 0x40) != 0) |
#define F83NAME_IMMEDIATE(np) (((np)->countetc & 0x20) != 0) |
#define F83NAME_IMMEDIATE(np) (((np)->countetc & 0x20) != 0) |
|
|
/* NEXT and NEXT1 are split into several parts to help scheduling, |
Cell *SP; |
unless CISC_NEXT is defined */ |
Float *FP; |
#ifdef CISC_NEXT |
Address UP=NULL; |
#define NEXT1_P1 |
|
#define NEXT_P1 |
|
#define DEF_CA |
|
#ifdef DIRECT_THREADED |
|
#define NEXT1_P2 ({goto *cfa;}) |
|
#else |
|
#define NEXT1_P2 ({goto **cfa;}) |
|
#endif /* DIRECT_THREADED */ |
|
#define NEXT_P2 ({cfa = *ip++; NEXT1_P2;}) |
|
#else /* CISC_NEXT */ |
|
#ifdef DIRECT_THREADED |
|
#define NEXT1_P1 |
|
#define NEXT1_P2 ({goto *cfa;}) |
|
#define DEF_CA |
|
#else /* DIRECT_THREADED */ |
|
#define NEXT1_P1 ({ca = *cfa;}) |
|
#define NEXT1_P2 ({goto *ca;}) |
|
#define DEF_CA Label ca; |
|
#endif /* DIRECT_THREADED */ |
|
#define NEXT_P1 ({cfa=*ip++; NEXT1_P1;}) |
|
#define NEXT_P2 NEXT1_P2 |
|
#endif /* CISC_NEXT */ |
|
|
|
#define NEXT1 ({DEF_CA NEXT1_P1; NEXT1_P2;}) |
|
#define NEXT ({DEF_CA NEXT_P1; NEXT_P2;}) |
|
|
|
#ifdef USE_TOS |
|
#define IF_TOS(x) x |
|
#else |
|
#define IF_TOS(x) |
|
#define TOS (sp[0]) |
|
#endif |
|
|
|
#ifdef USE_FTOS |
|
#define IF_FTOS(x) x |
|
#else |
|
#define IF_FTOS(x) |
|
#define FTOS (fp[0]) |
|
#endif |
|
|
|
|
#if 0 |
|
/* not used currently */ |
int emitcounter; |
int emitcounter; |
|
#endif |
#define NULLC '\0' |
#define NULLC '\0' |
|
|
char *cstr(Char *from, UCell size, int clear) |
char *cstr(Char *from, UCell size, int clear) |
/* if clear is true, scratch can be reused, otherwise we want more of |
/* return a C-string corresponding to the Forth string ( FROM SIZE ). |
the same */ |
the C-string lives until the next call of cstr with CLEAR being true */ |
{ |
{ |
static char *scratch=NULL; |
static struct cstr_buffer { |
static unsigned scratchsize=0; |
char *buffer; |
static char *nextscratch; |
size_t size; |
char *oldnextscratch; |
} *buffers=NULL; |
|
static int nbuffers=0; |
|
static int used=0; |
|
struct cstr_buffer *b; |
|
|
|
if (buffers==NULL) |
|
buffers=malloc(0); |
if (clear) |
if (clear) |
nextscratch=scratch; |
used=0; |
if (scratch==NULL) { |
if (used>=nbuffers) { |
scratch=malloc(size+1); |
buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1)); |
nextscratch=scratch; |
buffers[used]=(struct cstr_buffer){malloc(0),0}; |
scratchsize=size; |
nbuffers=used+1; |
} |
} |
else if (nextscratch+size>scratch+scratchsize) { |
b=&buffers[used]; |
char *oldscratch=scratch; |
if (size+1 > b->size) { |
scratch = realloc(scratch, (nextscratch-scratch)+size+1); |
b->buffer = realloc(b->buffer,size+1); |
nextscratch=scratch+(nextscratch-oldscratch); |
b->size = size+1; |
scratchsize=size; |
} |
} |
memcpy(b->buffer,from,size); |
memcpy(nextscratch,from,size); |
b->buffer[size]='\0'; |
nextscratch[size]='\0'; |
used++; |
oldnextscratch = nextscratch; |
return b->buffer; |
nextscratch += size+1; |
} |
return oldnextscratch; |
|
|
char *tilde_cstr(Char *from, UCell size, int clear) |
|
/* like cstr(), but perform tilde expansion on the string */ |
|
{ |
|
char *s1,*s2; |
|
int s1_len, s2_len; |
|
struct passwd *getpwnam (), *user_entry; |
|
|
|
if (size<1 || from[0]!='~') |
|
return cstr(from, size, clear); |
|
if (size<2 || from[1]=='/') { |
|
s1 = (char *)getenv ("HOME"); |
|
if(s1 == NULL) |
|
s1 = ""; |
|
s2 = from+1; |
|
s2_len = size-1; |
|
} else { |
|
UCell i; |
|
for (i=1; i<size && from[i]!='/'; i++) |
|
; |
|
{ |
|
char user[i]; |
|
memcpy(user,from+1,i-1); |
|
user[i-1]='\0'; |
|
user_entry=getpwnam(user); |
|
} |
|
if (user_entry==NULL) |
|
return cstr(from, size, clear); |
|
s1 = user_entry->pw_dir; |
|
s2 = from+i; |
|
s2_len = size-i; |
|
} |
|
s1_len = strlen(s1); |
|
if (s1_len>1 && s1[s1_len-1]=='/') |
|
s1_len--; |
|
{ |
|
char path[s1_len+s2_len]; |
|
memcpy(path,s1,s1_len); |
|
memcpy(path+s1_len,s2,s2_len); |
|
return cstr(path,s1_len+s2_len,clear); |
|
} |
} |
} |
|
|
|
|
#define NEWLINE '\n' |
#define NEWLINE '\n' |
|
|
Line 126 char *cstr(Char *from, UCell size, int c
|
Line 147 char *cstr(Char *from, UCell size, int c
|
#define rint(x) floor((x)+0.5) |
#define rint(x) floor((x)+0.5) |
#endif |
#endif |
|
|
static char* fileattr[6]={"r","rb","r+","r+b","w+","w+b"}; |
static char* fileattr[6]={"r","rb","r+","r+b","w","wb"}; |
|
|
|
#ifndef O_BINARY |
|
#define O_BINARY 0 |
|
#endif |
|
#ifndef O_TEXT |
|
#define O_TEXT 0 |
|
#endif |
|
|
static Address up0=NULL; |
static int ufileattr[6]= { |
|
O_RDONLY|O_TEXT, O_RDONLY|O_BINARY, |
|
O_RDWR |O_TEXT, O_RDWR |O_BINARY, |
|
O_WRONLY|O_TEXT, O_WRONLY|O_BINARY }; |
|
|
/* if machine.h has not defined explicit registers, define them as implicit */ |
/* if machine.h has not defined explicit registers, define them as implicit */ |
#ifndef IPREG |
#ifndef IPREG |
Line 159 static Address up0=NULL;
|
Line 190 static Address up0=NULL;
|
#define FTOSREG |
#define FTOSREG |
#endif |
#endif |
|
|
|
/* declare and compute cfa for certain threading variants */ |
|
/* warning: this is nonsyntactical; it will not work in place of a statement */ |
|
#ifdef CFA_NEXT |
|
#define DOCFA |
|
#else |
|
#define DOCFA Xt cfa; GETCFA(cfa) |
|
#endif |
|
|
Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) |
Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) |
/* executes code at ip, if ip!=NULL |
/* executes code at ip, if ip!=NULL |
returns array of machine code labels (for use in a loader), if ip==NULL |
returns array of machine code labels (for use in a loader), if ip==NULL |
Line 169 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
Line 208 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
register Cell *rp RPREG = rp0; |
register Cell *rp RPREG = rp0; |
register Float *fp FPREG = fp0; |
register Float *fp FPREG = fp0; |
register Address lp LPREG = lp0; |
register Address lp LPREG = lp0; |
|
#ifdef CFA_NEXT |
register Xt cfa CFAREG; |
register Xt cfa CFAREG; |
register Address up UPREG = up0; |
#endif |
|
register Address up UPREG = UP; |
IF_TOS(register Cell TOS TOSREG;) |
IF_TOS(register Cell TOS TOSREG;) |
IF_FTOS(register Float FTOS FTOSREG;) |
IF_FTOS(register Float FTOS FTOSREG;) |
static Label symbols[]= { |
static Label symbols[]= { |
Line 179 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
Line 220 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
&&dovar, |
&&dovar, |
&&douser, |
&&douser, |
&&dodefer, |
&&dodefer, |
|
&&dofield, |
&&dodoes, |
&&dodoes, |
&&dodoes, /* dummy for does handler address */ |
/* the following entry is normally unused; |
|
it's there because its index indicates a does-handler */ |
|
#ifdef CPU_DEP1 |
|
CPU_DEP1, |
|
#else |
|
(Label)0, |
|
#endif |
#include "prim_labels.i" |
#include "prim_labels.i" |
|
(Label)0 |
}; |
}; |
#ifdef CPU_DEP |
#ifdef CPU_DEP2 |
CPU_DEP; |
CPU_DEP2 |
#endif |
#endif |
|
|
#ifdef DEBUG |
#ifdef DEBUG |
Line 198 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
Line 247 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
|
|
IF_TOS(TOS = sp[0]); |
IF_TOS(TOS = sp[0]); |
IF_FTOS(FTOS = fp[0]); |
IF_FTOS(FTOS = fp[0]); |
prep_terminal(); |
/* prep_terminal(); */ |
|
NEXT_P0; |
NEXT; |
NEXT; |
|
|
|
#ifdef CPU_DEP3 |
|
CPU_DEP3 |
|
#endif |
|
|
docol: |
docol: |
|
{ |
|
DOCFA; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x: col: %08x\n",(Cell)ip,(Cell)PFA1(cfa)); |
fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
#endif |
#endif |
#ifdef CISC_NEXT |
#ifdef CISC_NEXT |
/* this is the simple version */ |
/* this is the simple version */ |
*--rp = (Cell)ip; |
|
ip = (Xt *)PFA1(cfa); |
|
NEXT; |
|
#else |
|
/* this one is important, so we help the compiler optimizing |
|
The following version may be better (for scheduling), but probably has |
|
problems with code fields employing calls and delay slots |
|
*/ |
|
{ |
|
DEF_CA |
|
Xt *current_ip = (Xt *)PFA1(cfa); |
|
cfa = *current_ip; |
|
NEXT1_P1; |
|
*--rp = (Cell)ip; |
*--rp = (Cell)ip; |
ip = current_ip+1; |
ip = (Xt *)PFA1(cfa); |
NEXT1_P2; |
NEXT_P0; |
} |
NEXT; |
|
#else |
|
/* this one is important, so we help the compiler optimizing |
|
The following version may be better (for scheduling), but probably has |
|
problems with code fields employing calls and delay slots |
|
*/ |
|
{ |
|
DEF_CA |
|
Xt *current_ip = (Xt *)PFA1(cfa); |
|
cfa = *current_ip; |
|
NEXT1_P1; |
|
*--rp = (Cell)ip; |
|
ip = current_ip+1; |
|
NEXT1_P2; |
|
} |
#endif |
#endif |
|
} |
|
|
docon: |
docon: |
|
{ |
|
DOCFA; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x: con: %08x\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
#endif |
#endif |
#ifdef USE_TOS |
#ifdef USE_TOS |
*sp-- = TOS; |
*sp-- = TOS; |
TOS = *(Cell *)PFA1(cfa); |
TOS = *(Cell *)PFA1(cfa); |
#else |
#else |
*--sp = *(Cell *)PFA1(cfa); |
*--sp = *(Cell *)PFA1(cfa); |
#endif |
#endif |
|
} |
|
NEXT_P0; |
NEXT; |
NEXT; |
|
|
dovar: |
dovar: |
|
{ |
|
DOCFA; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x: var: %08x\n",(Cell)ip,(Cell)PFA1(cfa)); |
fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
#endif |
#endif |
#ifdef USE_TOS |
#ifdef USE_TOS |
*sp-- = TOS; |
*sp-- = TOS; |
TOS = (Cell)PFA1(cfa); |
TOS = (Cell)PFA1(cfa); |
#else |
#else |
*--sp = (Cell)PFA1(cfa); |
*--sp = (Cell)PFA1(cfa); |
#endif |
#endif |
|
} |
|
NEXT_P0; |
NEXT; |
NEXT; |
|
|
/* !! user? */ |
|
|
|
douser: |
douser: |
|
{ |
|
DOCFA; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x: user: %08x\n",(Cell)ip,(Cell)PFA1(cfa)); |
fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
#endif |
#endif |
#ifdef USE_TOS |
#ifdef USE_TOS |
*sp-- = TOS; |
*sp-- = TOS; |
TOS = (Cell)(up+*(Cell*)PFA1(cfa)); |
TOS = (Cell)(up+*(Cell*)PFA1(cfa)); |
#else |
#else |
*--sp = (Cell)(up+*(Cell*)PFA1(cfa)); |
*--sp = (Cell)(up+*(Cell*)PFA1(cfa)); |
#endif |
#endif |
|
} |
|
NEXT_P0; |
NEXT; |
NEXT; |
|
|
dodefer: |
dodefer: |
|
{ |
|
DOCFA; |
|
#ifdef DEBUG |
|
fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
|
#endif |
|
EXEC(*(Xt *)PFA1(cfa)); |
|
} |
|
|
|
dofield: |
|
{ |
|
DOCFA; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x: defer: %08x\n",(Cell)ip,(Cell)PFA1(cfa)); |
fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
#endif |
#endif |
cfa = *(Xt *)PFA1(cfa); |
TOS += *(Cell*)PFA1(cfa); |
NEXT1; |
} |
|
NEXT_P0; |
|
NEXT; |
|
|
dodoes: |
dodoes: |
/* this assumes the following structure: |
/* this assumes the following structure: |
Line 289 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
Line 370 Label *engine(Xt *ip0, Cell *sp0, Cell *
|
pfa: |
pfa: |
|
|
*/ |
*/ |
|
{ |
|
DOCFA; |
|
|
|
/* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/ |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"%08x/%08x: does: %08x\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa)); |
fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa)); |
fflush(stderr); |
fflush(stderr); |
#endif |
#endif |
*--rp = (Cell)ip; |
*--rp = (Cell)ip; |
/* PFA1 might collide with DOES_CODE1 here, so we use PFA */ |
/* PFA1 might collide with DOES_CODE1 here, so we use PFA */ |
ip = DOES_CODE1(cfa); |
ip = DOES_CODE1(cfa); |
#ifdef USE_TOS |
#ifdef USE_TOS |
*sp-- = TOS; |
*sp-- = TOS; |
TOS = (Cell)PFA(cfa); |
TOS = (Cell)PFA(cfa); |
#else |
#else |
*--sp = (Cell)PFA(cfa); |
*--sp = (Cell)PFA(cfa); |
#endif |
#endif |
|
/* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/ |
|
} |
|
NEXT_P0; |
NEXT; |
NEXT; |
|
|
#include "primitives.i" |
#include "primitives.i" |