File:  [gforth] / gforth / engine / engine.c
Revision 1.66: download - view: text, annotated - select for diffs
Fri Aug 22 08:08:46 2003 UTC (16 years, 9 months ago) by anton
Branches: MAIN
CVS tags: v0-6-2, HEAD
fixed bugs in doer routines (showed up with threadng scheme 1)
testdist portability improvements

    1: /* Gforth virtual machine (aka inner interpreter)
    2: 
    3:   Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.
    4: 
    5:   This file is part of Gforth.
    6: 
    7:   Gforth is free software; you can redistribute it and/or
    8:   modify it under the terms of the GNU General Public License
    9:   as published by the Free Software Foundation; either version 2
   10:   of the License, or (at your option) any later version.
   11: 
   12:   This program is distributed in the hope that it will be useful,
   13:   but WITHOUT ANY WARRANTY; without even the implied warranty of
   14:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15:   GNU General Public License for more details.
   16: 
   17:   You should have received a copy of the GNU General Public License
   18:   along with this program; if not, write to the Free Software
   19:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: */
   21: 
   22: #include "config.h"
   23: #include "forth.h"
   24: #include <ctype.h>
   25: #include <stdio.h>
   26: #include <string.h>
   27: #include <math.h>
   28: #include <assert.h>
   29: #include <stdlib.h>
   30: #include <errno.h>
   31: #include "io.h"
   32: #include "threaded.h"
   33: #ifndef STANDALONE
   34: #include <sys/types.h>
   35: #include <sys/stat.h>
   36: #include <fcntl.h>
   37: #include <time.h>
   38: #include <sys/time.h>
   39: #include <unistd.h>
   40: #include <pwd.h>
   41: #include <dirent.h>
   42: #include <sys/resource.h>
   43: #ifdef HAVE_FNMATCH_H
   44: #include <fnmatch.h>
   45: #else
   46: #include "fnmatch.h"
   47: #endif
   48: #else
   49: #include "systypes.h"
   50: #endif
   51: 
   52: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
   53: #include <dlfcn.h>
   54: #endif
   55: #if defined(_WIN32)
   56: #include <windows.h>
   57: #endif
   58: #ifdef hpux
   59: #include <dl.h>
   60: #endif
   61: 
   62: #ifdef HAS_FFCALL
   63: #include <avcall.h>
   64: #include <callback.h>
   65: #endif
   66: 
   67: #ifndef SEEK_SET
   68: /* should be defined in stdio.h, but some systems don't have it */
   69: #define SEEK_SET 0
   70: #endif
   71: 
   72: #ifndef HAVE_FSEEKO
   73: #define fseeko fseek
   74: #endif
   75: 
   76: #ifndef HAVE_FTELLO
   77: #define ftello ftell
   78: #endif
   79: 
   80: #define NULLC '\0'
   81: 
   82: #ifdef MEMCMP_AS_SUBROUTINE
   83: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
   84: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
   85: #endif
   86: 
   87: #define NEWLINE	'\n'
   88: 
   89: /* conversion on fetch */
   90: 
   91: #define vm_Cell2f(_cell,_x)		((_x)=(Bool)(_cell))
   92: #define vm_Cell2c(_cell,_x)		((_x)=(Char)(_cell))
   93: #define vm_Cell2n(_cell,_x)		((_x)=(Cell)(_cell))
   94: #define vm_Cell2w(_cell,_x)		((_x)=(Cell)(_cell))
   95: #define vm_Cell2u(_cell,_x)		((_x)=(UCell)(_cell))
   96: #define vm_Cell2a_(_cell,_x)		((_x)=(Cell *)(_cell))
   97: #define vm_Cell2c_(_cell,_x)		((_x)=(Char *)(_cell))
   98: #define vm_Cell2f_(_cell,_x)		((_x)=(Float *)(_cell))
   99: #define vm_Cell2df_(_cell,_x)		((_x)=(DFloat *)(_cell))
  100: #define vm_Cell2sf_(_cell,_x)		((_x)=(SFloat *)(_cell))
  101: #define vm_Cell2xt(_cell,_x)		((_x)=(Xt)(_cell))
  102: #define vm_Cell2f83name(_cell,_x)	((_x)=(struct F83Name *)(_cell))
  103: #define vm_Cell2longname(_cell,_x)	((_x)=(struct Longname *)(_cell))
  104: #define vm_Float2r(_float,_x)		(_x=_float)
  105: 
  106: /* conversion on store */
  107: 
  108: #define vm_f2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  109: #define vm_c2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  110: #define vm_n2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  111: #define vm_w2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  112: #define vm_u2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  113: #define vm_a_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  114: #define vm_c_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  115: #define vm_f_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  116: #define vm_df_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  117: #define vm_sf_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  118: #define vm_xt2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  119: #define vm_f83name2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  120: #define vm_longname2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  121: #define vm_r2Float(_x,_float)		(_float=_x)
  122: 
  123: #define vm_Cell2Cell(_x,_y)		(_y=_x)
  124: 
  125: #ifdef NO_IP
  126: #define IMM_ARG(access,value)		(VARIANT(value))
  127: #else
  128: #define IMM_ARG(access,value)		(access)
  129: #endif
  130: 
  131: /* if machine.h has not defined explicit registers, define them as implicit */
  132: #ifndef IPREG
  133: #define IPREG
  134: #endif
  135: #ifndef SPREG
  136: #define SPREG
  137: #endif
  138: #ifndef RPREG
  139: #define RPREG
  140: #endif
  141: #ifndef FPREG
  142: #define FPREG
  143: #endif
  144: #ifndef LPREG
  145: #define LPREG
  146: #endif
  147: #ifndef CFAREG
  148: #define CFAREG
  149: #endif
  150: #ifndef UPREG
  151: #define UPREG
  152: #endif
  153: #ifndef TOSREG
  154: #define TOSREG
  155: #endif
  156: #ifndef FTOSREG
  157: #define FTOSREG
  158: #endif
  159: 
  160: #ifndef CPU_DEP1
  161: # define CPU_DEP1 0
  162: #endif
  163: 
  164: /* instructions containing SUPER_END must be the last instruction of a
  165:    super-instruction (e.g., branches, EXECUTE, and other instructions
  166:    ending the basic block). Instructions containing SET_IP get this
  167:    automatically, so you usually don't have to write it.  If you have
  168:    to write it, write it after IP points to the next instruction.
  169:    Used for profiling.  Don't write it in a word containing SET_IP, or
  170:    the following block will be counted twice. */
  171: #ifdef VM_PROFILING
  172: #define SUPER_END  vm_count_block(IP)
  173: #else
  174: #define SUPER_END
  175: #endif
  176: #define SUPER_CONTINUE
  177: 
  178: #ifdef GFORTH_DEBUGGING
  179: #define NAME(string) { saved_ip=ip; asm(""); }
  180: /* the asm here is to avoid reordering of following stuff above the
  181:    assignment; this is an old-style asm (no operands), and therefore
  182:    is treated like "asm volatile ..."; i.e., it prevents most
  183:    reorderings across itself.  We want the assignment above first,
  184:    because the stack loads may already cause a stack underflow. */
  185: #elif DEBUG
  186: #       define  NAME(string)    fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);
  187: #else
  188: #	define	NAME(string)
  189: #endif
  190: 
  191: #ifdef DEBUG
  192: #define CFA_TO_NAME(__cfa) \
  193:       Cell len, i; \
  194:       char * name = __cfa; \
  195:       for(i=0; i<32; i+=sizeof(Cell)) { \
  196:         len = ((Cell*)name)[-1]; \
  197:         if(len < 0) { \
  198: 	  len &= 0x1F; \
  199:           if((len+sizeof(Cell)) > i) break; \
  200: 	} len = 0; \
  201: 	name -= sizeof(Cell); \
  202:       }
  203: #endif
  204: 
  205: #ifdef HAS_FFCALL
  206: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
  207: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
  208: #endif
  209: 
  210: #if !defined(ENGINE)
  211: /* normal engine */
  212: #define VARIANT(v)	(v)
  213: #define JUMP(target)	goto I_noop
  214: #define LABEL(name) J_##name: asm(""); I_##name:
  215: 
  216: #elif ENGINE==2
  217: /* variant with padding between VM instructions for finding out
  218:    cross-inst jumps (for dynamic code) */
  219: #define engine engine2
  220: #define VARIANT(v)	(v)
  221: #define JUMP(target)	goto I_noop
  222: #define LABEL(name) J_##name: SKIP16; I_##name:
  223: #define IN_ENGINE2
  224: 
  225: #elif ENGINE==3
  226: /* variant with different immediate arguments for finding out
  227:    immediate arguments (for native code) */
  228: #define engine engine3
  229: #define VARIANT(v)	((v)^0xffffffff)
  230: #define JUMP(target)	goto K_lit
  231: #define LABEL(name) J_##name: asm(""); I_##name:
  232: #else
  233: #error illegal ENGINE value
  234: #endif /* ENGINE */
  235: 
  236: #define LABEL2(name) K_##name:
  237: 
  238: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
  239: /* executes code at ip, if ip!=NULL
  240:    returns array of machine code labels (for use in a loader), if ip==NULL
  241: */
  242: {
  243: #ifndef GFORTH_DEBUGGING
  244:   register Cell *rp RPREG;
  245: #endif
  246: #ifndef NO_IP
  247:   register Xt *ip IPREG = ip0;
  248: #endif
  249:   register Cell *sp SPREG = sp0;
  250:   register Float *fp FPREG = fp0;
  251:   register Address lp LPREG = lp0;
  252:   register Xt cfa CFAREG;
  253: #ifdef MORE_VARS
  254:   MORE_VARS
  255: #endif
  256: #ifdef HAS_FFCALL
  257:   av_alist alist;
  258:   extern va_alist clist;
  259:   float frv;
  260:   int irv;
  261:   double drv;
  262:   long long llrv;
  263:   void * prv;
  264: #endif
  265:   register Address up UPREG = UP;
  266:   IF_spTOS(register Cell spTOS TOSREG;)
  267:   IF_fpTOS(register Float fpTOS FTOSREG;)
  268: #if defined(DOUBLY_INDIRECT)
  269:   static Label *symbols;
  270:   static void *routines[]= {
  271: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
  272: #else /* !defined(DOUBLY_INDIRECT) */
  273:   static Label symbols[]= {
  274: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
  275: #endif /* !defined(DOUBLY_INDIRECT) */
  276: #define INST_ADDR(name) ((Label)&&I_##name)
  277: #include "prim_lab.i"
  278: #undef INST_ADDR
  279:     (Label)0,
  280: #define INST_ADDR(name) ((Label)&&K_##name)
  281: #include "prim_lab.i"
  282: #undef INST_ADDR
  283: #define INST_ADDR(name) ((Label)&&J_##name)
  284: #include "prim_lab.i"
  285: #undef INST_ADDR
  286:     (Label)&&after_last
  287:   };
  288: #ifdef CPU_DEP2
  289:   CPU_DEP2
  290: #endif
  291: 
  292:   rp = rp0;
  293: #ifdef DEBUG
  294:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
  295:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
  296: 	  (unsigned)fp,(unsigned)lp,(unsigned)up);
  297: #endif
  298: 
  299:   if (ip0 == NULL) {
  300: #if defined(DOUBLY_INDIRECT)
  301: #define CODE_OFFSET (26*sizeof(Cell))
  302: #define XT_OFFSET (22*sizeof(Cell))
  303:     int i;
  304:     Cell code_offset = offset_image? CODE_OFFSET : 0;
  305:     Cell xt_offset = offset_image? XT_OFFSET : 0;
  306: 
  307:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
  308:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
  309:     for (i=0; i<DOESJUMP+1; i++)
  310:       xts[i] = symbols[i] = (Label)routines[i];
  311:     for (; routines[i]!=0; i++) {
  312:       if (i>=MAX_SYMBOLS) {
  313: 	fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
  314: 	exit(1);
  315:       }
  316:       xts[i] = symbols[i] = &routines[i];
  317:     }
  318: #endif /* defined(DOUBLY_INDIRECT) */
  319:     return symbols;
  320:   }
  321: 
  322:   IF_spTOS(spTOS = sp[0]);
  323:   IF_fpTOS(fpTOS = fp[0]);
  324: /*  prep_terminal(); */
  325: #ifdef NO_IP
  326:   goto *(*(Label *)ip0);
  327: #else
  328:   SET_IP(ip);
  329:   SUPER_END; /* count the first block, too */
  330:   NEXT;
  331: #endif
  332: 
  333: #ifdef CPU_DEP3
  334:   CPU_DEP3
  335: #endif
  336: 
  337: #include "prim.i"
  338:   after_last: return (Label *)0;
  339:   /*needed only to get the length of the last primitive */
  340: }

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