version 1.18, 2000/06/14 20:31:47
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version 1.67, 2003/09/14 15:06:29
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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 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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You should have received a copy of the GNU General Public License |
You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
along with this program; if not, write to the Free Software |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
*/ |
*/ |
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#include "config.h" |
#include "config.h" |
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#include "forth.h" |
#include <ctype.h> |
#include <ctype.h> |
#include <stdio.h> |
#include <stdio.h> |
#include <string.h> |
#include <string.h> |
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#include <assert.h> |
#include <assert.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <errno.h> |
#include <errno.h> |
#include "forth.h" |
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#include "io.h" |
#include "io.h" |
#include "threaded.h" |
#include "threaded.h" |
#ifndef STANDALONE |
#ifndef STANDALONE |
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#include <unistd.h> |
#include <unistd.h> |
#include <pwd.h> |
#include <pwd.h> |
#include <dirent.h> |
#include <dirent.h> |
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#include <sys/resource.h> |
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#ifdef HAVE_FNMATCH_H |
#include <fnmatch.h> |
#include <fnmatch.h> |
#else |
#else |
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#include "fnmatch.h" |
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#endif |
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#else |
#include "systypes.h" |
#include "systypes.h" |
#endif |
#endif |
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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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/* are macros for setting necessary? */ |
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#define F83NAME_COUNT(np) ((np)->countetc & 0x1f) |
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#define F83NAME_SMUDGE(np) (((np)->countetc & 0x40) != 0) |
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#define F83NAME_IMMEDIATE(np) (((np)->countetc & 0x20) != 0) |
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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 87 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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#define NEWLINE '\n' |
#define NEWLINE '\n' |
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#ifndef HAVE_RINT |
/* conversion on fetch */ |
#define rint(x) floor((x)+0.5) |
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#endif |
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#ifdef HAS_FILE |
#define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell)) |
static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"}; |
#define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell)) |
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#define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell)) |
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#define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell)) |
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#define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell)) |
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#define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell)) |
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#define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell)) |
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#define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell)) |
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#define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell)) |
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#define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell)) |
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#define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell)) |
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#define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell)) |
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#define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell)) |
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#define vm_Float2r(_float,_x) (_x=_float) |
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/* conversion on store */ |
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#define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x)) |
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#define vm_r2Float(_x,_float) (_float=_x) |
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#ifndef O_BINARY |
#define vm_Cell2Cell(_x,_y) (_y=_x) |
#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]= { |
#ifdef NO_IP |
O_RDONLY|O_BINARY, O_RDONLY|O_BINARY, |
#define IMM_ARG(access,value) (VARIANT(value)) |
O_RDWR |O_BINARY, O_RDWR |O_BINARY, |
#else |
O_WRONLY|O_BINARY, O_WRONLY|O_BINARY }; |
#define IMM_ARG(access,value) (access) |
#endif |
#endif |
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/* if machine.h has not defined explicit registers, define them as implicit */ |
/* if machine.h has not defined explicit registers, define them as implicit */ |
Line 220 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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/* declare and compute cfa for certain threading variants */ |
/* instructions containing SUPER_END must be the last instruction of a |
/* warning: this is nonsyntactical; it will not work in place of a statement */ |
super-instruction (e.g., branches, EXECUTE, and other instructions |
#ifndef GETCFA |
ending the basic block). Instructions containing SET_IP get this |
#define DOCFA |
automatically, so you usually don't have to write it. If you have |
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to write it, write it after IP points to the next instruction. |
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Used for profiling. Don't write it in a word containing SET_IP, or |
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the following block will be counted twice. */ |
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#ifdef VM_PROFILING |
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#define SUPER_END vm_count_block(IP) |
#else |
#else |
#define DOCFA Xt cfa; GETCFA(cfa) |
#define SUPER_END |
#endif |
#endif |
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#define SUPER_CONTINUE |
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#ifdef GFORTH_DEBUGGING |
#ifdef GFORTH_DEBUGGING |
/* define some VM registers as global variables, so they survive exceptions; |
#define NAME(string) { saved_ip=ip; asm(""); } |
global register variables are not up to the task (according to the |
/* the asm here is to avoid reordering of following stuff above the |
GNU C manual) */ |
assignment; this is an old-style asm (no operands), and therefore |
Xt *ip; |
is treated like "asm volatile ..."; i.e., it prevents most |
Cell *rp; |
reorderings across itself. We want the assignment above first, |
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because the stack loads may already cause a stack underflow. */ |
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#elif DEBUG |
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# define NAME(string) fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp); |
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#else |
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# define NAME(string) |
#endif |
#endif |
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#ifdef DEBUG |
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#define CFA_TO_NAME(__cfa) \ |
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Cell len, i; \ |
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char * name = __cfa; \ |
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for(i=0; i<32; i+=sizeof(Cell)) { \ |
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len = ((Cell*)name)[-1]; \ |
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if(len < 0) { \ |
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len &= 0x1F; \ |
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if((len+sizeof(Cell)) > i) break; \ |
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} len = 0; \ |
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name -= sizeof(Cell); \ |
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} |
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#endif |
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#ifdef HAS_FFCALL |
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#define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp; |
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#define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]); |
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#endif |
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#if !defined(ENGINE) |
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/* normal engine */ |
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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: 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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/* the asm(""); is there to get a stop compiled on Itanium */ |
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#define LABEL2(name) K_##name: asm(""); |
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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 |
*/ |
*/ |
{ |
{ |
#ifndef GFORTH_DEBUGGING |
#ifndef GFORTH_DEBUGGING |
register Xt *ip IPREG; |
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register Cell *rp RPREG; |
register Cell *rp RPREG; |
#endif |
#endif |
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#ifndef NO_IP |
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register Xt *ip IPREG = ip0; |
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#endif |
register Cell *sp SPREG = sp0; |
register Cell *sp SPREG = sp0; |
register Float *fp FPREG = fp0; |
register Float *fp FPREG = fp0; |
register Address lp LPREG = lp0; |
register Address lp LPREG = lp0; |
#ifdef CFA_NEXT |
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register Xt cfa CFAREG; |
register Xt cfa CFAREG; |
#endif |
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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_TOS(register Cell TOS TOSREG;) |
IF_spTOS(register Cell spTOS TOSREG;) |
IF_FTOS(register Float FTOS FTOSREG;) |
IF_fpTOS(register Float fpTOS FTOSREG;) |
#if defined(DOUBLY_INDIRECT) |
#if defined(DOUBLY_INDIRECT) |
static Label *symbols; |
static Label *symbols; |
static void *routines[]= { |
static void *routines[]= { |
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#define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0])) |
#else /* !defined(DOUBLY_INDIRECT) */ |
#else /* !defined(DOUBLY_INDIRECT) */ |
static Label symbols[]= { |
static Label symbols[]= { |
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#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, |
#include "prim_lab.i" |
(Label)&&dovar, |
#undef INST_ADDR |
(Label)&&douser, |
(Label)0, |
(Label)&&dodefer, |
#define INST_ADDR(name) ((Label)&&K_##name) |
(Label)&&dofield, |
#include "prim_lab.i" |
(Label)&&dodoes, |
#undef INST_ADDR |
/* the following entry is normally unused; |
#define INST_ADDR(name) ((Label)&&J_##name) |
it's there because its index indicates a does-handler */ |
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CPU_DEP1, |
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#include "prim_lab.i" |
#include "prim_lab.i" |
(Label)0 |
#undef INST_ADDR |
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(Label)&&after_last |
}; |
}; |
#ifdef CPU_DEP2 |
#ifdef CPU_DEP2 |
CPU_DEP2 |
CPU_DEP2 |
#endif |
#endif |
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ip = ip0; |
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rp = rp0; |
rp = rp0; |
#ifdef DEBUG |
#ifdef DEBUG |
fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n", |
fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n", |
(unsigned)ip,(unsigned)sp,(unsigned)rp, |
(unsigned)ip0,(unsigned)sp,(unsigned)rp, |
(unsigned)fp,(unsigned)lp,(unsigned)up); |
(unsigned)fp,(unsigned)lp,(unsigned)up); |
#endif |
#endif |
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if (ip == NULL) { |
if (ip0 == NULL) { |
#if defined(DOUBLY_INDIRECT) |
#if defined(DOUBLY_INDIRECT) |
#define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0])) |
#define CODE_OFFSET (26*sizeof(Cell)) |
#define CODE_OFFSET (22*sizeof(Cell)) |
#define XT_OFFSET (22*sizeof(Cell)) |
int i; |
int i; |
Cell code_offset = offset_image? CODE_OFFSET : 0; |
Cell code_offset = offset_image? CODE_OFFSET : 0; |
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Cell xt_offset = offset_image? XT_OFFSET : 0; |
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symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset); |
symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset); |
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xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset); |
for (i=0; i<DOESJUMP+1; i++) |
for (i=0; i<DOESJUMP+1; 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); |
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} |
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xts[i] = symbols[i] = &routines[i]; |
} |
} |
symbols[i] = &routines[i]; |
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} |
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#endif /* defined(DOUBLY_INDIRECT) */ |
#endif /* defined(DOUBLY_INDIRECT) */ |
return symbols; |
return symbols; |
} |
} |
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IF_TOS(TOS = sp[0]); |
IF_spTOS(spTOS = sp[0]); |
IF_FTOS(FTOS = fp[0]); |
IF_fpTOS(fpTOS = fp[0]); |
/* prep_terminal(); */ |
/* prep_terminal(); */ |
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#ifdef NO_IP |
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goto *(*(Label *)ip0); |
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#else |
SET_IP(ip); |
SET_IP(ip); |
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SUPER_END; /* count the first block, too */ |
NEXT; |
NEXT; |
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#endif |
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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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DOCFA; |
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#ifdef DEBUG |
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fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
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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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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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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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} |
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docon: |
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{ |
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DOCFA; |
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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-- = TOS; |
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TOS = *(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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NEXT_P0; |
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NEXT; |
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dovar: |
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{ |
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DOCFA; |
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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-- = TOS; |
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TOS = (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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NEXT_P0; |
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NEXT; |
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douser: |
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{ |
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DOCFA; |
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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-- = TOS; |
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TOS = (Cell)(up+*(Cell*)PFA1(cfa)); |
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#else |
|
*--sp = (Cell)(up+*(Cell*)PFA1(cfa)); |
|
#endif |
|
} |
|
NEXT_P0; |
|
NEXT; |
|
|
|
dodefer: |
|
{ |
|
DOCFA; |
|
#ifdef DEBUG |
|
fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa)); |
|
#endif |
|
EXEC(*(Xt *)PFA1(cfa)); |
|
} |
|
|
|
dofield: |
|
{ |
|
DOCFA; |
|
#ifdef DEBUG |
|
fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa)); |
|
#endif |
|
TOS += *(Cell*)PFA1(cfa); |
|
} |
|
NEXT_P0; |
|
NEXT; |
|
|
|
dodoes: |
|
/* this assumes the following structure: |
|
defining-word: |
|
|
|
... |
|
DOES> |
|
(possible padding) |
|
possibly handler: jmp dodoes |
|
(possible branch delay slot(s)) |
|
Forth code after DOES> |
|
|
|
defined word: |
|
|
|
cfa: address of or jump to handler OR |
|
address of or jump to dodoes, address of DOES-code |
|
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 |
|
fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa)); |
|
fflush(stderr); |
|
#endif |
|
*--rp = (Cell)ip; |
|
/* PFA1 might collide with DOES_CODE1 here, so we use PFA */ |
|
#ifdef USE_TOS |
|
*sp-- = TOS; |
|
TOS = (Cell)PFA(cfa); |
|
#else |
|
*--sp = (Cell)PFA(cfa); |
|
#endif |
|
SET_IP(DOES_CODE1(cfa)); |
|
/* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/ |
|
} |
|
NEXT; |
|
|
|
#include "prim.i" |
#include "prim.i" |
|
after_last: return (Label *)0; |
|
/*needed only to get the length of the last primitive */ |
} |
} |