mach/proto/ncg/state.c

   1 #ifndef NORCSID
   2 static char rcsid[] = "$Id: state.c,v 0.3 1994/06/24 13:28:10 ceriel Exp $";
   3 #endif
   4
   5 #include "assert.h"
   6 #include "param.h"
   7 #include "tables.h"
   8 #include "types.h"
   9 #include <cgg_cg.h>
  10 #include "data.h"
  11 #include "result.h"
  12 #include "state.h"
  13 #include "extern.h"
  14
  15 /*
  16  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  17  * See the copyright notice in the ACK home directory, in the file "Copyright".
  18  *
  19  * Author: Hans van Staveren
  20  */
  21
  22 extern int nstab;       /* salloc.c */
  23
  24 savestatus(sp) register state_p sp; {
  25
  26         sp->st_sh = stackheight;
  27         bmove((short *)fakestack,(short *)sp->st_fs,stackheight*sizeof(token_t));
  28         sp->st_na = nallreg;
  29         bmove((short *)allreg,(short *)sp->st_ar,nallreg*sizeof(int));
  30         sp->st_ct = curtoken;
  31         bmove((short *)dollar,(short *)sp->st_do,LONGESTPATTERN*sizeof(result_t));
  32         bmove((short *)machregs,(short *)sp->st_mr,NREGS*sizeof(struct reginfo));
  33         sp->st_ne = nemlines;
  34         bmove((short *)emlines,(short *)sp->st_el,nemlines*sizeof(struct emline));
  35         sp->st_em = emp;
  36         sp->st_se = saveemp;
  37         sp->st_tl = tokpatlen;
  38         sp->st_ns = nstab;
  39 }
  40
  41 restorestatus(sp) register state_p sp; {
  42
  43         stackheight = sp->st_sh;
  44         bmove((short *)sp->st_fs,(short *)fakestack,stackheight*sizeof(token_t));
  45         nallreg = sp->st_na;
  46         bmove((short *)sp->st_ar,(short *)allreg,nallreg*sizeof(int));
  47         curtoken = sp->st_ct;
  48         bmove((short *)sp->st_do,(short *)dollar,LONGESTPATTERN*sizeof(result_t));
  49         bmove((short *)sp->st_mr,(short *)machregs,NREGS*sizeof(struct reginfo));
  50         nemlines = sp->st_ne;
  51         bmove((short *)sp->st_el,(short *)emlines,nemlines*sizeof(struct emline));
  52         emp = sp->st_em;
  53         saveemp = sp->st_se;
  54         tokpatlen = sp->st_tl;
  55         popstr(sp->st_ns);
  56 }
  57
  58 bmove(from,to,nbytes) register short *from,*to; register nbytes; {
  59
  60         if (nbytes<=0)
  61                 return;
  62         assert(sizeof(short)==2 && (nbytes&1)==0);
  63         nbytes>>=1;
  64         do
  65                 *to++ = *from++;
  66         while (--nbytes);
  67 }