version 1.47, 2002/12/15 17:38:52
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version 1.65, 2003/08/20 09:23:46
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Line 1
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/* Gforth virtual machine (aka inner interpreter) |
/* Gforth virtual machine (aka inner interpreter) |
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Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. |
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This file is part of Gforth. |
This file is part of Gforth. |
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Line 19
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Line 19
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
*/ |
*/ |
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undefine(`symbols') |
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#include "config.h" |
#include "config.h" |
#include "forth.h" |
#include "forth.h" |
#include <ctype.h> |
#include <ctype.h> |
Line 61 undefine(`symbols')
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Line 59 undefine(`symbols')
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#include <dl.h> |
#include <dl.h> |
#endif |
#endif |
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#ifdef HAS_FFCALL |
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#include <avcall.h> |
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#include <callback.h> |
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#endif |
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#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 |
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#define IOR(flag) ((flag)? -512-errno : 0) |
#ifndef HAVE_FSEEKO |
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#define fseeko fseek |
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#endif |
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struct F83Name { |
#ifndef HAVE_FTELLO |
struct F83Name *next; /* the link field for old hands */ |
#define ftello ftell |
char countetc; |
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char name[0]; |
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}; |
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#define F83NAME_COUNT(np) ((np)->countetc & 0x1f) |
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struct Longname { |
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struct Longname *next; /* the link field for old hands */ |
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Cell countetc; |
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char name[0]; |
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}; |
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#define LONGNAME_COUNT(np) ((np)->countetc & (((~((UCell)0))<<3)>>3)) |
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Cell *SP; |
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Float *FP; |
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Address UP=NULL; |
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#if 0 |
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/* not used currently */ |
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int emitcounter; |
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#endif |
#endif |
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#define NULLC '\0' |
#define NULLC '\0' |
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#ifdef MEMCMP_AS_SUBROUTINE |
#ifdef MEMCMP_AS_SUBROUTINE |
Line 99 extern int gforth_memcmp(const char * s1
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Line 84 extern int gforth_memcmp(const char * s1
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#define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n) |
#define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n) |
#endif |
#endif |
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#ifdef HAS_FILE |
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char *cstr(Char *from, UCell size, int clear) |
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/* return a C-string corresponding to the Forth string ( FROM SIZE ). |
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the C-string lives until the next call of cstr with CLEAR being true */ |
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{ |
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static struct cstr_buffer { |
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char *buffer; |
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size_t size; |
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} *buffers=NULL; |
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static int nbuffers=0; |
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static int used=0; |
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struct cstr_buffer *b; |
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if (buffers==NULL) |
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buffers=malloc(0); |
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if (clear) |
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used=0; |
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if (used>=nbuffers) { |
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buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1)); |
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buffers[used]=(struct cstr_buffer){malloc(0),0}; |
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nbuffers=used+1; |
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} |
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b=&buffers[used]; |
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if (size+1 > b->size) { |
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b->buffer = realloc(b->buffer,size+1); |
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b->size = size+1; |
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} |
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memcpy(b->buffer,from,size); |
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b->buffer[size]='\0'; |
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used++; |
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return b->buffer; |
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} |
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char *tilde_cstr(Char *from, UCell size, int clear) |
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/* like cstr(), but perform tilde expansion on the string */ |
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{ |
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char *s1,*s2; |
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int s1_len, s2_len; |
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struct passwd *getpwnam (), *user_entry; |
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if (size<1 || from[0]!='~') |
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return cstr(from, size, clear); |
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if (size<2 || from[1]=='/') { |
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s1 = (char *)getenv ("HOME"); |
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if(s1 == NULL) |
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s1 = ""; |
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s2 = from+1; |
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s2_len = size-1; |
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} else { |
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UCell i; |
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for (i=1; i<size && from[i]!='/'; i++) |
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; |
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if (i==2 && from[1]=='+') /* deal with "~+", i.e., the wd */ |
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return cstr(from+3, size<3?0:size-3,clear); |
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{ |
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char user[i]; |
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memcpy(user,from+1,i-1); |
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user[i-1]='\0'; |
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user_entry=getpwnam(user); |
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} |
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if (user_entry==NULL) |
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return cstr(from, size, clear); |
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s1 = user_entry->pw_dir; |
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s2 = from+i; |
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s2_len = size-i; |
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} |
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s1_len = strlen(s1); |
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if (s1_len>1 && s1[s1_len-1]=='/') |
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s1_len--; |
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{ |
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char path[s1_len+s2_len]; |
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memcpy(path,s1,s1_len); |
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memcpy(path+s1_len,s2,s2_len); |
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return cstr(path,s1_len+s2_len,clear); |
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} |
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} |
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#endif |
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DCell timeval2us(struct timeval *tvp) |
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{ |
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#ifndef BUGGY_LONG_LONG |
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return (tvp->tv_sec*(DCell)1000000)+tvp->tv_usec; |
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#else |
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DCell d2; |
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DCell d1=mmul(tvp->tv_sec,1000000); |
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d2.lo = d1.lo+tvp->tv_usec; |
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d2.hi = d1.hi + (d2.lo<d1.lo); |
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return d2; |
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#endif |
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} |
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#define NEWLINE '\n' |
#define NEWLINE '\n' |
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#ifdef HAS_FILE |
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static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"}; |
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static char* pfileattr[6]={"r","r","r+","r+","w","w"}; |
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#ifndef O_BINARY |
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#define O_BINARY 0 |
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#endif |
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#ifndef O_TEXT |
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#define O_TEXT 0 |
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#endif |
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static int ufileattr[6]= { |
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O_RDONLY|O_BINARY, O_RDONLY|O_BINARY, |
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O_RDWR |O_BINARY, O_RDWR |O_BINARY, |
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O_WRONLY|O_BINARY, O_WRONLY|O_BINARY }; |
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#endif |
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/* conversion on fetch */ |
/* conversion on fetch */ |
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#define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell)) |
#define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell)) |
Line 284 static int ufileattr[6]= {
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Line 161 static int ufileattr[6]= {
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# define CPU_DEP1 0 |
# define CPU_DEP1 0 |
#endif |
#endif |
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/* instructions containing these must be the last instruction of a |
/* instructions containing SUPER_END must be the last instruction of a |
super-instruction (e.g., branches, EXECUTE, and other instructions |
super-instruction (e.g., branches, EXECUTE, and other instructions |
ending the basic block). Instructions containing SET_IP get this |
ending the basic block). Instructions containing SET_IP get this |
automatically, so you usually don't have to write it. If you have |
automatically, so you usually don't have to write it. If you have |
Line 298 static int ufileattr[6]= {
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Line 175 static int ufileattr[6]= {
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#endif |
#endif |
#define SUPER_CONTINUE |
#define SUPER_CONTINUE |
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#ifdef GFORTH_DEBUGGING |
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/* define some VM registers as global variables, so they survive exceptions; |
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global register variables are not up to the task (according to the |
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GNU C manual) */ |
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Xt *saved_ip; |
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Cell *rp; |
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#endif |
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#ifdef NO_IP |
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static Label next_code; |
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#endif |
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#ifdef DEBUG |
#ifdef DEBUG |
#define CFA_TO_NAME(__cfa) \ |
#define CFA_TO_NAME(__cfa) \ |
Cell len, i; \ |
Cell len, i; \ |
Line 324 static Label next_code;
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Line 189 static Label next_code;
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} |
} |
#endif |
#endif |
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Xt *primtable(Label symbols[], Cell size) |
#ifdef HAS_FFCALL |
/* used in primitive primtable for peephole optimization */ |
#define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp; |
{ |
#define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]); |
Xt *xts = (Xt *)malloc(size*sizeof(Xt)); |
#endif |
Cell i; |
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for (i=0; i<size; i++) |
#if !defined(ENGINE) |
xts[i] = &symbols[i]; |
/* normal engine */ |
return xts; |
#define VARIANT(v) (v) |
} |
#define JUMP(target) goto I_noop |
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#define LABEL(name) J_##name: asm(""); I_##name: |
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#elif ENGINE==2 |
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/* variant with padding between VM instructions for finding out |
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cross-inst jumps (for dynamic code) */ |
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#define engine engine2 |
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#define VARIANT(v) (v) |
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#define JUMP(target) goto I_noop |
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#define LABEL(name) J_##name: SKIP16; I_##name: |
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#define IN_ENGINE2 |
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#elif ENGINE==3 |
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/* variant with different immediate arguments for finding out |
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immediate arguments (for native code) */ |
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#define engine engine3 |
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#define VARIANT(v) ((v)^0xffffffff) |
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#define JUMP(target) goto K_lit |
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#define LABEL(name) J_##name: asm(""); I_##name: |
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#else |
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#error illegal ENGINE value |
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#endif /* ENGINE */ |
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#define LABEL2(name) K_##name: |
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define(enginerest, |
Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) |
`(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0) |
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/* 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 354 define(enginerest,
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Line 240 define(enginerest,
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#ifdef MORE_VARS |
#ifdef MORE_VARS |
MORE_VARS |
MORE_VARS |
#endif |
#endif |
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#ifdef HAS_FFCALL |
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av_alist alist; |
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extern va_alist clist; |
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float frv; |
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int irv; |
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double drv; |
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long long llrv; |
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void * prv; |
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#endif |
register Address up UPREG = UP; |
register Address up UPREG = UP; |
IF_spTOS(register Cell spTOS TOSREG;) |
IF_spTOS(register Cell spTOS TOSREG;) |
IF_fpTOS(register Float fpTOS FTOSREG;) |
IF_fpTOS(register Float fpTOS FTOSREG;) |
Line 365 define(enginerest,
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Line 260 define(enginerest,
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static Label symbols[]= { |
static Label symbols[]= { |
#define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0])) |
#define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0])) |
#endif /* !defined(DOUBLY_INDIRECT) */ |
#endif /* !defined(DOUBLY_INDIRECT) */ |
(Label)&&docol, |
#define INST_ADDR(name) ((Label)&&I_##name) |
(Label)&&docon, |
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(Label)&&dovar, |
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(Label)&&douser, |
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(Label)&&dodefer, |
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(Label)&&dofield, |
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(Label)&&dodoes, |
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/* the following entry is normally unused; |
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it is there because its index indicates a does-handler */ |
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CPU_DEP1, |
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#define INST_ADDR(name) (Label)&&I_##name |
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#include "prim_lab.i" |
#include "prim_lab.i" |
#undef INST_ADDR |
#undef INST_ADDR |
(Label)&&after_last, |
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(Label)0, |
(Label)0, |
#define INST_ADDR(name) (Label)&&K_##name |
#define INST_ADDR(name) ((Label)&&K_##name) |
#include "prim_lab.i" |
#include "prim_lab.i" |
#undef INST_ADDR |
#undef INST_ADDR |
#ifdef IN_ENGINE2 |
#define INST_ADDR(name) ((Label)&&J_##name) |
#define INST_ADDR(name) (Label)&&J_##name |
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#include "prim_lab.i" |
#include "prim_lab.i" |
#undef INST_ADDR |
#undef INST_ADDR |
#endif |
(Label)&&after_last |
}; |
}; |
#ifdef CPU_DEP2 |
#ifdef CPU_DEP2 |
CPU_DEP2 |
CPU_DEP2 |
Line 414 define(enginerest,
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Line 297 define(enginerest,
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xts[i] = symbols[i] = (Label)routines[i]; |
xts[i] = symbols[i] = (Label)routines[i]; |
for (; routines[i]!=0; i++) { |
for (; routines[i]!=0; i++) { |
if (i>=MAX_SYMBOLS) { |
if (i>=MAX_SYMBOLS) { |
fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS); |
fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS); |
exit(1); |
exit(1); |
} |
} |
xts[i] = symbols[i] = &routines[i]; |
xts[i] = symbols[i] = &routines[i]; |
Line 437 define(enginerest,
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Line 320 define(enginerest,
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#ifdef CPU_DEP3 |
#ifdef CPU_DEP3 |
CPU_DEP3 |
CPU_DEP3 |
#endif |
#endif |
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docol: |
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{ |
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#ifdef NO_IP |
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*--rp = next_code; |
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goto **(Label *)PFA1(cfa); |
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#else |
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#ifdef DEBUG |
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{ |
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CFA_TO_NAME(cfa); |
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fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa), |
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len,name); |
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} |
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#endif |
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#ifdef CISC_NEXT |
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/* this is the simple version */ |
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*--rp = (Cell)ip; |
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SET_IP((Xt *)PFA1(cfa)); |
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SUPER_END; |
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NEXT; |
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#else |
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/* this one is important, so we help the compiler optimizing */ |
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{ |
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DEF_CA |
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rp[-1] = (Cell)ip; |
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SET_IP((Xt *)PFA1(cfa)); |
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SUPER_END; |
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NEXT_P1; |
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rp--; |
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NEXT_P2; |
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} |
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#endif |
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#endif |
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} |
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docon: |
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{ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
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#endif |
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#ifdef USE_TOS |
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*sp-- = spTOS; |
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spTOS = *(Cell *)PFA1(cfa); |
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#else |
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*--sp = *(Cell *)PFA1(cfa); |
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#endif |
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} |
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#ifdef NO_IP |
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goto *next_code; |
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#else |
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NEXT_P0; |
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NEXT; |
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#endif |
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dovar: |
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{ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
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#endif |
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#ifdef USE_TOS |
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*sp-- = spTOS; |
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spTOS = (Cell)PFA1(cfa); |
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#else |
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*--sp = (Cell)PFA1(cfa); |
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#endif |
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} |
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#ifdef NO_IP |
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goto *next_code; |
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#else |
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NEXT_P0; |
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NEXT; |
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#endif |
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douser: |
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{ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
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#endif |
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#ifdef USE_TOS |
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*sp-- = spTOS; |
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spTOS = (Cell)(up+*(Cell*)PFA1(cfa)); |
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#else |
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*--sp = (Cell)(up+*(Cell*)PFA1(cfa)); |
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#endif |
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} |
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#ifdef NO_IP |
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goto *next_code; |
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#else |
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NEXT_P0; |
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NEXT; |
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#endif |
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dodefer: |
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{ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
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#endif |
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SUPER_END; |
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EXEC(*(Xt *)PFA1(cfa)); |
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} |
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dofield: |
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{ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
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#endif |
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spTOS += *(Cell*)PFA1(cfa); |
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} |
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#ifdef NO_IP |
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goto *next_code; |
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#else |
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NEXT_P0; |
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NEXT; |
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#endif |
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dodoes: |
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/* this assumes the following structure: |
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defining-word: |
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... |
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DOES> |
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(possible padding) |
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possibly handler: jmp dodoes |
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(possible branch delay slot(s)) |
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Forth code after DOES> |
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defined word: |
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cfa: address of or jump to handler OR |
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address of or jump to dodoes, address of DOES-code |
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pfa: |
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*/ |
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#ifdef NO_IP |
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*--rp = next_code; |
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IF_spTOS(spTOS = sp[0]); |
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sp--; |
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spTOS = (Cell)PFA(cfa); |
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goto **(Label *)DOES_CODE1(cfa); |
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#else |
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{ |
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/* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/ |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa)); |
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fflush(stderr); |
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#endif |
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*--rp = (Cell)ip; |
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/* PFA1 might collide with DOES_CODE1 here, so we use PFA */ |
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#ifdef USE_TOS |
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*sp-- = spTOS; |
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spTOS = (Cell)PFA(cfa); |
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#else |
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*--sp = (Cell)PFA(cfa); |
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#endif |
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SET_IP(DOES_CODE1(cfa)); |
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SUPER_END; |
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/* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/ |
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} |
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NEXT; |
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#endif |
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#ifndef IN_ENGINE2 |
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#define LABEL(name) I_##name: |
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#else |
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#define LABEL(name) J_##name: asm(".skip 16"); I_##name: |
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#endif |
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#define LABEL2(name) K_##name: |
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#include "prim.i" |
#include "prim.i" |
#undef LABEL |
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after_last: return (Label *)0; |
after_last: return (Label *)0; |
/*needed only to get the length of the last primitive */ |
/*needed only to get the length of the last primitive */ |
}' |
} |
) |
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#define VARIANT(v) (v) |
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#define JUMP(target) goto I_noop |
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Label *engine enginerest |
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#ifndef NO_DYNAMIC |
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#ifdef NO_IP |
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#undef VARIANT |
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#define VARIANT(v) ((v)^0xffffffff) |
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#undef JUMP |
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#define JUMP(target) goto K_lit |
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Label *engine3 enginerest |
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#endif |
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#undef VARIANT |
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#define VARIANT(v) (v) |
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#undef JUMP |
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#define JUMP(target) goto I_noop |
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#define IN_ENGINE2 |
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Label *engine2 enginerest |
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#endif |
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