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put stack caching stuff in prims2x.fs (cvs log prims2y.fs for
	fine-grained changes)
set up prim etc. to work with the changes prims2x.fs (disabled USE_TOS for now)

    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: #define USE_NO_TOS
   23: #define USE_NO_FTOS
   24: 
   25: #include "config.h"
   26: #include "forth.h"
   27: #include <ctype.h>
   28: #include <stdio.h>
   29: #include <string.h>
   30: #include <math.h>
   31: #include <assert.h>
   32: #include <stdlib.h>
   33: #include <errno.h>
   34: #include "io.h"
   35: #include "threaded.h"
   36: #ifndef STANDALONE
   37: #include <sys/types.h>
   38: #include <sys/stat.h>
   39: #include <fcntl.h>
   40: #include <time.h>
   41: #include <sys/time.h>
   42: #include <unistd.h>
   43: #include <pwd.h>
   44: #include <dirent.h>
   45: #include <sys/resource.h>
   46: #ifdef HAVE_FNMATCH_H
   47: #include <fnmatch.h>
   48: #else
   49: #include "fnmatch.h"
   50: #endif
   51: #else
   52: #include "systypes.h"
   53: #endif
   54: 
   55: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
   56: #include <dlfcn.h>
   57: #endif
   58: #if defined(_WIN32)
   59: #include <windows.h>
   60: #endif
   61: #ifdef hpux
   62: #include <dl.h>
   63: #endif
   64: 
   65: #ifdef HAS_FFCALL
   66: #include <avcall.h>
   67: #include <callback.h>
   68: #endif
   69: 
   70: #ifndef SEEK_SET
   71: /* should be defined in stdio.h, but some systems don't have it */
   72: #define SEEK_SET 0
   73: #endif
   74: 
   75: #ifndef HAVE_FSEEKO
   76: #define fseeko fseek
   77: #endif
   78: 
   79: #ifndef HAVE_FTELLO
   80: #define ftello ftell
   81: #endif
   82: 
   83: #define NULLC '\0'
   84: 
   85: #ifdef MEMCMP_AS_SUBROUTINE
   86: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
   87: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
   88: #endif
   89: 
   90: #define NEWLINE	'\n'
   91: 
   92: /* conversion on fetch */
   93: 
   94: #define vm_Cell2f(_cell,_x)		((_x)=(Bool)(_cell))
   95: #define vm_Cell2c(_cell,_x)		((_x)=(Char)(_cell))
   96: #define vm_Cell2n(_cell,_x)		((_x)=(Cell)(_cell))
   97: #define vm_Cell2w(_cell,_x)		((_x)=(Cell)(_cell))
   98: #define vm_Cell2u(_cell,_x)		((_x)=(UCell)(_cell))
   99: #define vm_Cell2a_(_cell,_x)		((_x)=(Cell *)(_cell))
  100: #define vm_Cell2c_(_cell,_x)		((_x)=(Char *)(_cell))
  101: #define vm_Cell2f_(_cell,_x)		((_x)=(Float *)(_cell))
  102: #define vm_Cell2df_(_cell,_x)		((_x)=(DFloat *)(_cell))
  103: #define vm_Cell2sf_(_cell,_x)		((_x)=(SFloat *)(_cell))
  104: #define vm_Cell2xt(_cell,_x)		((_x)=(Xt)(_cell))
  105: #define vm_Cell2f83name(_cell,_x)	((_x)=(struct F83Name *)(_cell))
  106: #define vm_Cell2longname(_cell,_x)	((_x)=(struct Longname *)(_cell))
  107: #define vm_Float2r(_float,_x)		(_x=_float)
  108: 
  109: /* conversion on store */
  110: 
  111: #define vm_f2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  112: #define vm_c2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  113: #define vm_n2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  114: #define vm_w2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  115: #define vm_u2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  116: #define vm_a_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  117: #define vm_c_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  118: #define vm_f_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  119: #define vm_df_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  120: #define vm_sf_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  121: #define vm_xt2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  122: #define vm_f83name2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  123: #define vm_longname2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  124: #define vm_r2Float(_x,_float)		(_float=_x)
  125: 
  126: #define vm_Cell2Cell(_x,_y)		(_y=_x)
  127: 
  128: #ifdef NO_IP
  129: #define IMM_ARG(access,value)		(VARIANT(value))
  130: #else
  131: #define IMM_ARG(access,value)		(access)
  132: #endif
  133: 
  134: /* if machine.h has not defined explicit registers, define them as implicit */
  135: #ifndef IPREG
  136: #define IPREG
  137: #endif
  138: #ifndef SPREG
  139: #define SPREG
  140: #endif
  141: #ifndef RPREG
  142: #define RPREG
  143: #endif
  144: #ifndef FPREG
  145: #define FPREG
  146: #endif
  147: #ifndef LPREG
  148: #define LPREG
  149: #endif
  150: #ifndef CFAREG
  151: #define CFAREG
  152: #endif
  153: #ifndef UPREG
  154: #define UPREG
  155: #endif
  156: #ifndef TOSREG
  157: #define TOSREG
  158: #endif
  159: #ifndef FTOSREG
  160: #define FTOSREG
  161: #endif
  162: 
  163: #ifndef CPU_DEP1
  164: # define CPU_DEP1 0
  165: #endif
  166: 
  167: /* instructions containing SUPER_END must be the last instruction of a
  168:    super-instruction (e.g., branches, EXECUTE, and other instructions
  169:    ending the basic block). Instructions containing SET_IP get this
  170:    automatically, so you usually don't have to write it.  If you have
  171:    to write it, write it after IP points to the next instruction.
  172:    Used for profiling.  Don't write it in a word containing SET_IP, or
  173:    the following block will be counted twice. */
  174: #ifdef VM_PROFILING
  175: #define SUPER_END  vm_count_block(IP)
  176: #else
  177: #define SUPER_END
  178: #endif
  179: #define SUPER_CONTINUE
  180: 
  181: #ifdef GFORTH_DEBUGGING
  182: #define NAME(string) { saved_ip=ip; asm(""); }
  183: /* the asm here is to avoid reordering of following stuff above the
  184:    assignment; this is an old-style asm (no operands), and therefore
  185:    is treated like "asm volatile ..."; i.e., it prevents most
  186:    reorderings across itself.  We want the assignment above first,
  187:    because the stack loads may already cause a stack underflow. */
  188: #elif DEBUG
  189: #       define  NAME(string)    fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);
  190: #else
  191: #	define	NAME(string)
  192: #endif
  193: 
  194: #ifdef DEBUG
  195: #define CFA_TO_NAME(__cfa) \
  196:       Cell len, i; \
  197:       char * name = __cfa; \
  198:       for(i=0; i<32; i+=sizeof(Cell)) { \
  199:         len = ((Cell*)name)[-1]; \
  200:         if(len < 0) { \
  201: 	  len &= 0x1F; \
  202:           if((len+sizeof(Cell)) > i) break; \
  203: 	} len = 0; \
  204: 	name -= sizeof(Cell); \
  205:       }
  206: #endif
  207: 
  208: #ifdef HAS_FFCALL
  209: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
  210: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
  211: #endif
  212: 
  213: #if !defined(ENGINE)
  214: /* normal engine */
  215: #define VARIANT(v)	(v)
  216: #define JUMP(target)	goto I_noop
  217: #define LABEL(name) J_##name: asm(""); I_##name:
  218: 
  219: #elif ENGINE==2
  220: /* variant with padding between VM instructions for finding out
  221:    cross-inst jumps (for dynamic code) */
  222: #define engine engine2
  223: #define VARIANT(v)	(v)
  224: #define JUMP(target)	goto I_noop
  225: #define LABEL(name) J_##name: SKIP16; I_##name:
  226: #define IN_ENGINE2
  227: 
  228: #elif ENGINE==3
  229: /* variant with different immediate arguments for finding out
  230:    immediate arguments (for native code) */
  231: #define engine engine3
  232: #define VARIANT(v)	((v)^0xffffffff)
  233: #define JUMP(target)	goto K_lit
  234: #define LABEL(name) J_##name: asm(""); I_##name:
  235: #else
  236: #error illegal ENGINE value
  237: #endif /* ENGINE */
  238: 
  239: /* the asm(""); is there to get a stop compiled on Itanium */
  240: #define LABEL2(name) K_##name: asm("");
  241: 
  242: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
  243: /* executes code at ip, if ip!=NULL
  244:    returns array of machine code labels (for use in a loader), if ip==NULL
  245: */
  246: {
  247: #ifndef GFORTH_DEBUGGING
  248:   register Cell *rp RPREG;
  249: #endif
  250: #ifndef NO_IP
  251:   register Xt *ip IPREG = ip0;
  252: #endif
  253:   register Cell *sp SPREG = sp0;
  254:   register Float *fp FPREG = fp0;
  255:   register Address lp LPREG = lp0;
  256:   register Xt cfa CFAREG;
  257: #ifdef MORE_VARS
  258:   MORE_VARS
  259: #endif
  260: #ifdef HAS_FFCALL
  261:   av_alist alist;
  262:   extern va_alist clist;
  263:   float frv;
  264:   int irv;
  265:   double drv;
  266:   long long llrv;
  267:   void * prv;
  268: #endif
  269:   register Address up UPREG = UP;
  270:   IF_spTOS(register Cell spTOS TOSREG;)
  271:   IF_fpTOS(register Float fpTOS FTOSREG;)
  272: #if defined(DOUBLY_INDIRECT)
  273:   static Label *symbols;
  274:   static void *routines[]= {
  275: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
  276: #else /* !defined(DOUBLY_INDIRECT) */
  277:   static Label symbols[]= {
  278: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
  279: #endif /* !defined(DOUBLY_INDIRECT) */
  280: #define INST_ADDR(name) ((Label)&&I_##name)
  281: #include "prim_lab.i"
  282: #undef INST_ADDR
  283:     (Label)0,
  284: #define INST_ADDR(name) ((Label)&&K_##name)
  285: #include "prim_lab.i"
  286: #undef INST_ADDR
  287: #define INST_ADDR(name) ((Label)&&J_##name)
  288: #include "prim_lab.i"
  289: #undef INST_ADDR
  290:     (Label)&&after_last
  291:   };
  292: #ifdef CPU_DEP2
  293:   CPU_DEP2
  294: #endif
  295: 
  296:   rp = rp0;
  297: #ifdef DEBUG
  298:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
  299:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
  300: 	  (unsigned)fp,(unsigned)lp,(unsigned)up);
  301: #endif
  302: 
  303:   if (ip0 == NULL) {
  304: #if defined(DOUBLY_INDIRECT)
  305: #define CODE_OFFSET (26*sizeof(Cell))
  306: #define XT_OFFSET (22*sizeof(Cell))
  307:     int i;
  308:     Cell code_offset = offset_image? CODE_OFFSET : 0;
  309:     Cell xt_offset = offset_image? XT_OFFSET : 0;
  310: 
  311:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
  312:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
  313:     for (i=0; i<DOESJUMP+1; i++)
  314:       xts[i] = symbols[i] = (Label)routines[i];
  315:     for (; routines[i]!=0; i++) {
  316:       if (i>=MAX_SYMBOLS) {
  317: 	fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
  318: 	exit(1);
  319:       }
  320:       xts[i] = symbols[i] = &routines[i];
  321:     }
  322: #endif /* defined(DOUBLY_INDIRECT) */
  323:     return symbols;
  324:   }
  325: 
  326:   IF_spTOS(spTOS = sp[0]);
  327:   IF_fpTOS(fpTOS = fp[0]);
  328: /*  prep_terminal(); */
  329: #ifdef NO_IP
  330:   goto *(*(Label *)ip0);
  331: #else
  332:   SET_IP(ip);
  333:   SUPER_END; /* count the first block, too */
  334:   NEXT;
  335: #endif
  336: 
  337: #ifdef CPU_DEP3
  338:   CPU_DEP3
  339: #endif
  340: 
  341: #include "prim.i"
  342:   after_last: return (Label *)0;
  343:   /*needed only to get the length of the last primitive */
  344: }