140 lines
3 KiB
C
140 lines
3 KiB
C
#include "assert.h"
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#include "param.h"
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#include "tables.h"
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#ifdef REGVARS
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#ifndef NORCSID
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static char rcsid[] = "$Header$";
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#endif
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#include "types.h"
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#include <cg_pattern.h>
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#include "data.h"
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#include "regvar.h"
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#include <em_reg.h>
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#include "result.h"
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#include "extern.h"
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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* Author: Hans van Staveren
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*/
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extern string myalloc();
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struct regvar *rvlist;
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struct regvar *
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linkreg(of,sz,tp,sc) long of; {
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struct regvar *rvlp;
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rvlp= (struct regvar *) myalloc(sizeof *rvlp);
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rvlp->rv_next = rvlist;
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rvlist=rvlp;
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rvlp->rv_off = of;
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rvlp->rv_size = sz;
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rvlp->rv_type = tp;
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rvlp->rv_score = sc;
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rvlp->rv_reg = 0; /* no register assigned yet */
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return(rvlp);
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}
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tryreg(rvlp,typ) struct regvar *rvlp; {
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int score;
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register i;
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struct regassigned *ra;
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struct regvar *save;
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if (typ != reg_any && nregvar[typ]!=0) {
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if (machregs[rvnumbers[typ][0]].r_size!=rvlp->rv_size)
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score = -1;
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else
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score = regscore(rvlp->rv_off,
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rvlp->rv_size,
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rvlp->rv_type,
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rvlp->rv_score,
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typ); /* machine dependent */
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ra = regassigned[typ];
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if (score>ra[nregvar[typ]-1].ra_score) {
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save = ra[nregvar[typ]-1].ra_rv;
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for (i=nregvar[typ]-1;i>0 && ra[i-1].ra_score<score;i--)
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ra[i] = ra[i-1];
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ra[i].ra_rv = rvlp;
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ra[i].ra_score = score;
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if((rvlp=save)==0)
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return;
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}
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}
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if (nregvar[reg_any]==0)
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return;
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if (machregs[rvnumbers[reg_any][0]].r_size!=rvlp->rv_size)
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score = -1;
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else
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score = regscore(rvlp->rv_off,
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rvlp->rv_size,
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rvlp->rv_type,
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rvlp->rv_score,
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reg_any); /* machine dependent */
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ra = regassigned[reg_any];
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if (score>ra[nregvar[reg_any]-1].ra_score) {
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for (i=nregvar[reg_any]-1;i>0 && ra[i-1].ra_score<score;i--)
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ra[i] = ra[i-1];
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ra[i].ra_rv = rvlp;
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ra[i].ra_score = score;
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}
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}
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fixregvars(saveall) {
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register struct regvar *rv;
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register rvtyp,i;
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swtxt();
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i_regsave(); /* machine dependent initialization */
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for (rvtyp=reg_any;rvtyp<=reg_float;rvtyp++) {
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for(i=0;i<nregvar[rvtyp];i++)
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if (saveall) {
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struct reginfo *rp;
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rp= &machregs[rvnumbers[rvtyp][i]];
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regsave(codestrings[rp->r_repr],(long)-TEM_WSIZE,rp->r_size);
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} else if(regassigned[rvtyp][i].ra_score>0) {
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rv=regassigned[rvtyp][i].ra_rv;
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rv->rv_reg=rvnumbers[rvtyp][i];
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regsave(codestrings[machregs[rv->rv_reg].r_repr],
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rv->rv_off,rv->rv_size);
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}
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}
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f_regsave();
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}
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isregvar(off) long off; {
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register struct regvar *rvlp;
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for(rvlp=rvlist;rvlp!=0;rvlp=rvlp->rv_next)
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if(rvlp->rv_off == off)
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return(rvlp->rv_reg);
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return(-1);
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}
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unlinkregs() {
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register struct regvar *rvlp,*t;
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register struct regassigned *ra;
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int rvtyp,i;
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for(rvlp=rvlist;rvlp!=0;rvlp=t) {
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t=rvlp->rv_next;
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myfree(rvlp);
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}
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rvlist=0;
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for (rvtyp=reg_any;rvtyp<=reg_float;rvtyp++) {
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for(i=0;i<nregvar[rvtyp];i++) {
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ra= ®assigned[rvtyp][i];
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ra->ra_rv = 0;
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ra->ra_score = 0;
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}
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}
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}
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#endif /* REGVARS */
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/* nothing after this */
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