4.2BSD/usr/src/old/f77/vax.c
#include "defs"
#ifdef SDB
# include <a.out.h>
extern int types2[];
# ifndef N_SO
# include <stab.h>
# endif
#endif
#include "pccdefs"
/*
VAX-11/780 - SPECIFIC ROUTINES
*/
int maxregvar = MAXREGVAR;
int regnum[] = { 11, 10, 9, 8, 7, 6 } ;
static int regmask[] = { 0, 0x800, 0xc00, 0xe00, 0xf00, 0xf80, 0xfc0 };
ftnint intcon[14] =
{ 2, 2, 2, 2,
15, 31, 24, 56,
-128, -128, 127, 127,
32767, 2147483647 };
#if HERE == VAX
/* then put in constants in octal */
long realcon[6][2] =
{
{ 0200, 0 },
{ 0200, 0 },
{ 037777677777, 0 },
{ 037777677777, 037777777777 },
{ 032200, 0 },
{ 022200, 0 }
};
#else
double realcon[6] =
{
2.9387358771e-39,
2.938735877055718800e-39
1.7014117332e+38,
1.701411834604692250e+38
5.960464e-8,
1.38777878078144567e-17,
};
#endif
prsave(proflab)
int proflab;
{
if(profileflag)
{
fprintf(asmfile, "L%d:\t.space\t4\n", proflab);
p2pi("\tmovab\tL%d,r0", proflab);
p2pass("\tjsb\tmcount");
}
p2pi("\tsubl2\t$LF%d,sp", procno);
}
goret(type)
int type;
{
p2pass("\tret");
}
/*
* move argument slot arg1 (relative to ap)
* to slot arg2 (relative to ARGREG)
*/
mvarg(type, arg1, arg2)
int type, arg1, arg2;
{
p2pij("\tmovl\t%d(ap),%d(fp)", arg1+ARGOFFSET, arg2+argloc);
}
prlabel(fp, k)
FILEP fp;
int k;
{
fprintf(fp, "L%d:\n", k);
}
prconi(fp, type, n)
FILEP fp;
int type;
ftnint n;
{
fprintf(fp, "\t%s\t%ld\n", (type==TYSHORT ? ".word" : ".long"), n);
}
prcona(fp, a)
FILEP fp;
ftnint a;
{
fprintf(fp, "\t.long\tL%ld\n", a);
}
#ifndef vax
prconr(fp, type, x)
FILEP fp;
int type;
float x;
{
fprintf(fp, "\t%s\t0f%e\n", (type==TYREAL ? ".float" : ".double"), x);
}
#endif
#ifdef vax
prconr(fp, type, x)
FILEP fp;
int type;
double x;
{
/* non-portable cheat to preserve bit patterns */
union { double xd; long int xl[2]; } cheat;
cheat.xd = x;
if(type == TYREAL)
{float y = x; fprintf(fp, "\t.long\t0x%X\n", *(long *) &y); }
else
fprintf(fp, "\t.long\t0x%X,0x%X\n", cheat.xl[0], cheat.xl[1]);
}
#endif
praddr(fp, stg, varno, offset)
FILE *fp;
int stg, varno;
ftnint offset;
{
char *memname();
if(stg == STGNULL)
fprintf(fp, "\t.long\t0\n");
else
{
fprintf(fp, "\t.long\t%s", memname(stg,varno));
if(offset)
fprintf(fp, "+%ld", offset);
fprintf(fp, "\n");
}
}
preven(k)
int k;
{
register int lg;
if(k > 4)
lg = 3;
else if(k > 2)
lg = 2;
else if(k > 1)
lg = 1;
else
return;
fprintf(asmfile, "\t.align\t%d\n", lg);
}
vaxgoto(index, nlab, labs)
expptr index;
register int nlab;
struct Labelblock *labs[];
{
register int i;
register int arrlab;
putforce(TYINT, index);
p2pi("\tcasel\tr0,$1,$%d", nlab-1);
p2pi("L%d:", arrlab = newlabel() );
for(i = 0; i< nlab ; ++i)
if( labs[i] )
p2pij("\t.word\tL%d-L%d", labs[i]->labelno, arrlab);
}
prarif(p, neg, zer, pos)
expptr p;
int neg, zer, pos;
{
putforce(p->headblock.vtype, p);
if( ISINT(p->headblock.vtype) )
p2pass("\ttstl\tr0");
else
p2pass("\ttstd\tr0");
p2pi("\tjlss\tL%d", neg);
p2pi("\tjeql\tL%d", zer);
p2pi("\tjbr\tL%d", pos);
}
char *memname(stg, mem)
int stg, mem;
{
static char s[20];
switch(stg)
{
case STGCOMMON:
case STGEXT:
sprintf(s, "_%s", varstr(XL, extsymtab[mem].extname) );
break;
case STGBSS:
case STGINIT:
sprintf(s, "v.%d", mem);
break;
case STGCONST:
sprintf(s, "L%d", mem);
break;
case STGEQUIV:
sprintf(s, "q.%d", mem+eqvstart);
break;
default:
badstg("memname", stg);
}
return(s);
}
prlocvar(s, len)
char *s;
ftnint len;
{
fprintf(asmfile, "\t.lcomm\t%s,%ld\n", s, len);
}
prext(name, leng, init)
char *name;
ftnint leng;
int init;
{
if(leng == 0)
fprintf(asmfile, "\t.globl\t_%s\n", name);
else
fprintf(asmfile, "\t.comm\t_%s,%ld\n", name, leng);
}
prendproc()
{
}
prtail()
{
}
prolog(ep, argvec)
struct Entrypoint *ep;
Addrp argvec;
{
int i, argslot, proflab;
int size;
register chainp p;
register Namep q;
register struct Dimblock *dp;
expptr tp;
p2pass("\t.align\t1");
if(procclass == CLMAIN) {
if(fudgelabel)
{
if(ep->entryname) {
p2ps("_%s:", varstr(XL, ep->entryname->extname));
p2pi("\t.word\tLWM%d", procno);
}
putlabel(fudgelabel);
fudgelabel = 0;
fixlwm();
}
else
{
p2pass( "_MAIN_:" );
if(ep->entryname == NULL)
p2pi("\t.word\tLWM%d", procno);
}
} else if(ep->entryname)
if(fudgelabel)
{
putlabel(fudgelabel);
fudgelabel = 0;
fixlwm();
}
else
{
p2ps("_%s:", varstr(XL, ep->entryname->extname));
p2pi("\t.word\tLWM%d", procno);
prsave(newlabel());
}
if(procclass == CLBLOCK)
return;
if(argvec)
{
argloc = argvec->memoffset->constblock.const.ci + SZINT;
/* first slot holds count */
if(proctype == TYCHAR)
{
mvarg(TYADDR, 0, chslot);
mvarg(TYLENG, SZADDR, chlgslot);
argslot = SZADDR + SZLENG;
}
else if( ISCOMPLEX(proctype) )
{
mvarg(TYADDR, 0, cxslot);
argslot = SZADDR;
}
else
argslot = 0;
for(p = ep->arglist ; p ; p =p->nextp)
{
q = (Namep) (p->datap);
mvarg(TYADDR, argslot, q->vardesc.varno);
argslot += SZADDR;
}
for(p = ep->arglist ; p ; p = p->nextp)
{
q = (Namep) (p->datap);
if(q->vtype==TYCHAR && q->vclass!=CLPROC)
{
if(q->vleng && ! ISCONST(q->vleng) )
mvarg(TYLENG, argslot,
q->vleng->addrblock.memno);
argslot += SZLENG;
}
}
p2pi("\taddl3\t$%d,fp,ap", argloc-ARGOFFSET);
p2pi("\tmovl\t$%d,(ap)\n", lastargslot/SZADDR);
}
for(p = ep->arglist ; p ; p = p->nextp)
{
q = (Namep) (p->datap);
if(dp = q->vdim)
{
for(i = 0 ; i < dp->ndim ; ++i)
if(dp->dims[i].dimexpr)
puteq( fixtype(cpexpr(dp->dims[i].dimsize)),
fixtype(cpexpr(dp->dims[i].dimexpr)));
size = typesize[ q->vtype ];
if(q->vtype == TYCHAR)
if( ISICON(q->vleng) )
size *= q->vleng->constblock.const.ci;
else
size = -1;
/* on VAX, get more efficient subscripting if subscripts
have zero-base, so fudge the argument pointers for arrays.
Not done if array bounds are being checked.
*/
if(dp->basexpr)
puteq( cpexpr(fixtype(dp->baseoffset)),
cpexpr(fixtype(dp->basexpr)));
if(! checksubs)
{
if(dp->basexpr)
{
if(size > 0)
tp = (expptr) ICON(size);
else
tp = (expptr) cpexpr(q->vleng);
putforce(TYINT,
fixtype( mkexpr(OPSTAR, tp,
cpexpr(dp->baseoffset)) ));
p2pi("\tsubl2\tr0,%d(ap)",
p->datap->nameblock.vardesc.varno +
ARGOFFSET);
}
else if(dp->baseoffset->constblock.const.ci != 0)
{
char buff[25];
if(size > 0)
{
sprintf(buff, "\tsubl2\t$%ld,%d(ap)",
dp->baseoffset->constblock.const.ci * size,
p->datap->nameblock.vardesc.varno +
ARGOFFSET);
}
else {
putforce(TYINT, mkexpr(OPSTAR, cpexpr(dp->baseoffset),
cpexpr(q->vleng) ));
sprintf(buff, "\tsubl2\tr0,%d(ap)",
p->datap->nameblock.vardesc.varno +
ARGOFFSET);
}
p2pass(buff);
}
}
}
}
if(typeaddr)
puteq( cpexpr(typeaddr), mkaddcon(ep->typelabel) );
/* replace to avoid long jump problem
putgoto(ep->entrylabel);
*/
p2pi("\tjmp\tL%d", ep->entrylabel);
}
fixlwm()
{
extern lwmno;
if (lwmno == procno)
return;
fprintf(asmfile, "\t.set\tLWM%d,0x%x\n",
procno, regmask[highregvar]);
lwmno = procno;
}
prhead(fp)
FILEP fp;
{
#if FAMILY==PCC
p2triple(P2LBRACKET, ARGREG-highregvar, procno);
p2word( (long) (BITSPERCHAR*autoleng) );
p2flush();
#endif
}
prdbginfo()
{
}
#ifdef SDB
# ifdef UCBVAXASM
char *stabdline(code, type)
int code;
int type;
{
static char buff[30];
sprintf(buff, "\t.stabd\t0%o,0,0%o\n", code, type);
return(buff);
}
# endif
prstab(s, code, type, loc)
char *s, *loc;
int code, type;
{
char * stabline();
if(sdbflag)
fprintf(asmfile, stabline(s,code,type,loc) );
}
char *stabline(s, code, type, loc)
register char *s;
int code;
int type;
char *loc;
{
static char buff[512] = "\t.stab\t\t";
register char *t;
register int i = 0;
#ifdef UCBVAXASM
t = buff + 8;
if(s == NULL)
buff[6] = 'n'; /* .stabn line */
else
{
buff[6] = 's'; /* .stabs line */
*t++ = '"';
while(*s!='\0' && *s!=' ')
{
#ifndef UCBPASS2
if (i == 8)
break;
#endif
*t++ = *s++;
++i;
}
*t++ = '"';
*t++ = ',';
}
#else
t = buff + 7;
if(s)
while( *s!='\0' && *s!=' ' && i<8 )
{
*t++ = '\'';
*t++ = *s++;
*t++ = ',';
++i;
}
for( ; i<8 ; ++i)
{
*t++ = '0';
*t++ = ',';
}
#endif
sprintf(t, "0%o,0,0%o,%s\n", code, type, (loc? loc : "0") );
return(buff);
}
prstleng(np, leng)
register Namep np;
ftnint leng;
{
ftnint iarrlen();
prstab( varstr(VL,np->varname), N_LENG, 0, convic(leng) );
}
stabtype(p)
register Namep p;
{
register int type;
register int shift;
type = types2[p->vtype];
if(p->vdim)
{
type |= 060; /* .stab code for array */
shift = 2;
}
else if(p->vclass == CLPROC)
{
type |= 040; /* .stab code for function */
shift = 2;
}
else
shift = 0;
if(p->vstg == STGARG)
type |= (020 << shift); /* code for pointer-to */
return(type);
}
prstssym(np)
register Namep np;
{
prstab(varstr(VL,np->varname), N_SSYM,
stabtype(np), convic(np->voffset) );
}
#endif