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BSD 4 release
[unix-history] / usr / src / cmd / f77 / putpcc.c
/* INTERMEDIATE CODE GENERATION FOR S. C. JOHNSON C COMPILERS */
/* NEW VERSION USING BINARY POLISH POSTFIX INTERMEDIATE */
#if FAMILY != PCC
WRONG put FILE !!!!
#endif
#include "defs"
#include "pccdefs"
Addrp putcall(), putcxeq(), putcx1(), realpart();
expptr imagpart();
ftnint lencat();
#define FOUR 4
extern int ops2[];
extern int types2[];
#define P2BUFFMAX 128
static long int p2buff[P2BUFFMAX];
static long int *p2bufp = &p2buff[0];
static long int *p2bufend = &p2buff[P2BUFFMAX];
puthead(s, class)
char *s;
int class;
{
char buff[100];
#if TARGET == VAX
if(s)
p2ps("\t.globl\t_%s", s);
#endif
/* put out fake copy of left bracket line, to be redone later */
if( ! headerdone )
{
#if FAMILY == PCC
p2flush();
#endif
headoffset = ftell(textfile);
prhead(textfile);
headerdone = YES;
p2triple(P2STMT, (strlen(infname)+FOUR-1)/FOUR, 0);
p2str(infname);
#if TARGET == PDP11
/* fake jump to start the optimizer */
if(class != CLBLOCK)
putgoto( fudgelabel = newlabel() );
#endif
#if TARGET == VAX
/* jump from top to bottom */
if(s!=CNULL && class!=CLBLOCK)
{
int proflab = newlabel();
p2ps("_%s:", s);
p2pi("\t.word\tLWM%d", procno);
prsave(proflab);
p2pi("\tjmp\tL%d", fudgelabel = newlabel());
}
}
}
/* It is necessary to precede each procedure with a "left bracket"
* line that tells pass 2 how many register variables and how
* much automatic space is required for the function. This compiler
* does not know how much automatic space is needed until the
* entire procedure has been processed. Therefore, "puthead"
* is called at the begining to record the current location in textfile,
* then to put out a placeholder left bracket line. This procedure
* repositions the file and rewrites that line, then puts the
* file pointer back to the end of the file.
*/
putbracket()
{
long int hereoffset;
#if FAMILY == PCC
p2flush();
#endif
hereoffset = ftell(textfile);
if(fseek(textfile, headoffset, 0))
fatal("fseek failed");
prhead(textfile);
if(fseek(textfile, hereoffset, 0))
fatal("fseek failed 2");
}
putrbrack(k)
int k;
{
p2op(P2RBRACKET, k);
}
putnreg()
{
}
puteof()
{
p2op(P2EOF, 0);
p2flush();
}
putstmt()
{
p2triple(P2STMT, 0, lineno);
}
/* put out code for if( ! p) goto l */
putif(p,l)
register expptr p;
int l;
{
register int k;
if( ( k = (p = fixtype(p))->headblock.vtype) != TYLOGICAL)
{
if(k != TYERROR)
err("non-logical expression in IF statement");
frexpr(p);
}
else
{
putex1(p);
p2icon( (long int) l , P2INT);
p2op(P2CBRANCH, 0);
putstmt();
}
}
/* put out code for goto l */
putgoto(label)
int label;
{
p2triple(P2GOTO, 1, label);
putstmt();
}
/* branch to address constant or integer variable */
putbranch(p)
register Addrp p;
{
putex1(p);
p2op(P2GOTO, P2INT);
putstmt();
}
/* put out label l: */
putlabel(label)
int label;
{
p2op(P2LABEL, label);
}
putexpr(p)
expptr p;
{
putex1(p);
putstmt();
}
putcmgo(index, nlab, labs)
expptr index;
int nlab;
struct Labelblock *labs[];
{
int i, labarray, skiplabel;
if(! ISINT(index->headblock.vtype) )
{
execerr("computed goto index must be integer", CNULL);
return;
}
#if TARGET == VAX
/* use special case instruction */
vaxgoto(index, nlab, labs);
#else
labarray = newlabel();
preven(ALIADDR);
prlabel(asmfile, labarray);
prcona(asmfile, (ftnint) (skiplabel = newlabel()) );
for(i = 0 ; i < nlab ; ++i)
if( labs[i] )
prcona(asmfile, (ftnint)(labs[i]->labelno) );
prcmgoto(index, nlab, skiplabel, labarray);
putlabel(skiplabel);
#endif
}
\f
putx(p)
expptr p;
{
char *memname();
int opc;
int ncomma;
int type, k;
switch(p->tag)
{
case TERROR:
free( (charptr) p );
break;
case TCONST:
switch(type = p->constblock.vtype)
{
case TYLOGICAL:
type = tyint;
case TYLONG:
case TYSHORT:
p2icon(p->constblock.const.ci, types2[type]);
free( (charptr) p );
break;
case TYADDR:
p2triple(P2ICON, 1, P2INT|P2PTR);
p2word(0L);
p2name(memname(STGCONST,
(int) p->constblock.const.ci) );
free( (charptr) p );
break;
default:
putx( putconst(p) );
break;
}
break;
case TEXPR:
switch(opc = p->exprblock.opcode)
{
case OPCALL:
case OPCCALL:
if( ISCOMPLEX(p->exprblock.vtype) )
putcxop(p);
else putcall(p);
break;
case OPMIN:
case OPMAX:
putmnmx(p);
break;
case OPASSIGN:
if(ISCOMPLEX(p->exprblock.leftp->headblock.vtype)
|| ISCOMPLEX(p->exprblock.rightp->headblock.vtype) )
frexpr( putcxeq(p) );
else if( ISCHAR(p) )
putcheq(p);
else
goto putopp;
break;
case OPEQ:
case OPNE:
if( ISCOMPLEX(p->exprblock.leftp->headblock.vtype) ||
ISCOMPLEX(p->exprblock.rightp->headblock.vtype) )
{
putcxcmp(p);
break;
}
case OPLT:
case OPLE:
case OPGT:
case OPGE:
if(ISCHAR(p->exprblock.leftp))
{
putchcmp(p);
break;
}
goto putopp;
case OPPOWER:
putpower(p);
break;
case OPSTAR:
#if FAMILY == PCC
/* m * (2**k) -> m<<k */
if(INT(p->exprblock.leftp->headblock.vtype) &&
ISICON(p->exprblock.rightp) &&
( (k = log2(p->exprblock.rightp->constblock.const.ci))>0) )
{
p->exprblock.opcode = OPLSHIFT;
frexpr(p->exprblock.rightp);
p->exprblock.rightp = ICON(k);
goto putopp;
}
#endif
case OPMOD:
goto putopp;
case OPPLUS:
case OPMINUS:
case OPSLASH:
case OPNEG:
if( ISCOMPLEX(p->exprblock.vtype) )
putcxop(p);
else goto putopp;
break;
case OPCONV:
if( ISCOMPLEX(p->exprblock.vtype) )
putcxop(p);
else if( ISCOMPLEX(p->exprblock.leftp->headblock.vtype) )
{
ncomma = 0;
putx( mkconv(p->exprblock.vtype,
realpart(putcx1(p->exprblock.leftp,
&ncomma))));
putcomma(ncomma, p->exprblock.vtype, NO);
free( (charptr) p );
}
else goto putopp;
break;
case OPNOT:
case OPOR:
case OPAND:
case OPEQV:
case OPNEQV:
case OPADDR:
case OPPLUSEQ:
case OPSTAREQ:
case OPCOMMA:
case OPQUEST:
case OPCOLON:
case OPBITOR:
case OPBITAND:
case OPBITXOR:
case OPBITNOT:
case OPLSHIFT:
case OPRSHIFT:
putopp:
putop(p);
break;
default:
badop("putx", opc);
}
break;
case TADDR:
putaddr(p, YES);
break;
default:
badtag("putx", p->tag);
}
}
LOCAL putop(p)
expptr p;
{
int k;
expptr lp, tp;
int pt, lt;
int comma;
switch(p->exprblock.opcode) /* check for special cases and rewrite */
{
case OPCONV:
pt = p->exprblock.vtype;
lp = p->exprblock.leftp;
lt = lp->headblock.vtype;
while(p->tag==TEXPR && p->exprblock.opcode==OPCONV &&
( (ISREAL(pt)&&ISREAL(lt)) ||
(INT(pt)&&(ONEOF(lt,MSKINT|MSKADDR|MSKCHAR|M(TYSUBR)))) ))
{
#if SZINT < SZLONG
if(lp->tag != TEXPR)
{
if(pt==TYINT && lt==TYLONG)
break;
if(lt==TYINT && pt==TYLONG)
break;
}
#endif
#if TARGET == VAX
if(pt==TYDREAL && lt==TYREAL)
{
if(lp->tag==TEXPR &&
lp->exprblock.opcode==OPCONV &&
lp->exprblock.leftp->headblock.vtype==TYDREAL)
{
putx(lp->exprblock.leftp);
p2op(P2CONV, P2REAL);
p2op(P2CONV, P2DREAL);
free( (charptr) p );
return;
}
else break;
}
#endif
if(lt==TYCHAR && lp->tag==TEXPR &&
lp->exprblock.opcode==OPCALL)
{
p->exprblock.leftp = (expptr) putcall(lp);
putop(p);
putcomma(1, pt, NO);
free( (charptr) p );
return;
}
free( (charptr) p );
p = lp;
pt = lt;
lp = p->exprblock.leftp;
lt = lp->headblock.vtype;
}
if(p->tag==TEXPR && p->exprblock.opcode==OPCONV)
break;
putx(p);
return;
case OPADDR:
comma = NO;
lp = p->exprblock.leftp;
if(lp->tag != TADDR)
{
tp = (expptr)
mktemp(lp->headblock.vtype,lp->headblock.vleng);
putx( mkexpr(OPASSIGN, cpexpr(tp), lp) );
lp = tp;
comma = YES;
}
putaddr(lp, NO);
if(comma)
putcomma(1, TYINT, NO);
free( (charptr) p );
return;
#if TARGET == VAX
/* take advantage of a glitch in the code generator that does not check
the type clash in an assignment or comparison of an integer zero and
a floating left operand, and generates optimal code for the correct
type. (The PCC has no floating-constant node to encode this correctly.)
*/
case OPASSIGN:
case OPLT:
case OPLE:
case OPGT:
case OPGE:
case OPEQ:
case OPNE:
if(ISREAL(p->exprblock.leftp->headblock.vtype) &&
ISREAL(p->exprblock.rightp->headblock.vtype) &&
ISCONST(p->exprblock.rightp) &&
p->exprblock.rightp->constblock.const.cd[0]==0)
{
p->exprblock.rightp->constblock.vtype = TYINT;
p->exprblock.rightp->constblock.const.ci = 0;
}
#endif
}
if( (k = ops2[p->exprblock.opcode]) <= 0)
badop("putop", p->exprblock.opcode);
putx(p->exprblock.leftp);
if(p->exprblock.rightp)
putx(p->exprblock.rightp);
p2op(k, types2[p->exprblock.vtype]);
if(p->exprblock.vleng)
frexpr(p->exprblock.vleng);
free( (charptr) p );
}
\f
putforce(t, p)
int t;
expptr p;
{
p = mkconv(t, fixtype(p));
putx(p);
p2op(P2FORCE,
(t==TYSHORT ? P2SHORT : (t==TYLONG ? P2LONG : P2DREAL)) );
putstmt();
}
LOCAL putpower(p)
expptr p;
{
expptr base;
Addrp t1, t2;
ftnint k;
int type;
int ncomma;
if(!ISICON(p->exprblock.rightp) ||
(k = p->exprblock.rightp->constblock.const.ci)<2)
fatal("putpower: bad call");
base = p->exprblock.leftp;
type = base->headblock.vtype;
t1 = mktemp(type, PNULL);
t2 = NULL;
ncomma = 1;
putassign(cpexpr(t1), cpexpr(base) );
for( ; (k&1)==0 && k>2 ; k>>=1 )
{
++ncomma;
putsteq(t1, t1);
}
if(k == 2)
putx( mkexpr(OPSTAR, cpexpr(t1), cpexpr(t1)) );
else
{
t2 = mktemp(type, PNULL);
++ncomma;
putassign(cpexpr(t2), cpexpr(t1));
for(k>>=1 ; k>1 ; k>>=1)
{
++ncomma;
putsteq(t1, t1);
if(k & 1)
{
++ncomma;
putsteq(t2, t1);
}
}
putx( mkexpr(OPSTAR, cpexpr(t2),
mkexpr(OPSTAR, cpexpr(t1), cpexpr(t1)) ));
}
putcomma(ncomma, type, NO);
frexpr(t1);
if(t2)
frexpr(t2);
frexpr(p);
}
LOCAL Addrp intdouble(p, ncommap)
Addrp p;
int *ncommap;
{
register Addrp t;
t = mktemp(TYDREAL, PNULL);
++*ncommap;
putassign(cpexpr(t), p);
return(t);
}
LOCAL Addrp putcxeq(p)
register expptr p;
{
register Addrp lp, rp;
int ncomma;
if(p->tag != TEXPR)
badtag("putcxeq", p->tag);
ncomma = 0;
lp = putcx1(p->exprblock.leftp, &ncomma);
rp = putcx1(p->exprblock.rightp, &ncomma);
putassign(realpart(lp), realpart(rp));
if( ISCOMPLEX(p->exprblock.vtype) )
{
++ncomma;
putassign(imagpart(lp), imagpart(rp));
}
putcomma(ncomma, TYREAL, NO);
frexpr(rp);
free( (charptr) p );
return(lp);
}
LOCAL putcxop(p)
expptr p;
{
Addrp putcx1();
int ncomma;
ncomma = 0;
putaddr( putcx1(p, &ncomma), NO);
putcomma(ncomma, TYINT, NO);
}
LOCAL Addrp putcx1(p, ncommap)
register expptr p;
int *ncommap;
{
expptr q;
Addrp lp, rp;
register Addrp resp;
int opcode;
int ltype, rtype;
expptr mkrealcon();
if(p == NULL)
return(NULL);
switch(p->tag)
{
case TCONST:
if( ISCOMPLEX(p->constblock.vtype) )
p = (expptr) putconst(p);
return( (Addrp) p );
case TADDR:
if( ! addressable(p) )
{
++*ncommap;
resp = mktemp(tyint, PNULL);
putassign( cpexpr(resp), p->addrblock.memoffset );
p->addrblock.memoffset = (expptr)resp;
}
return( (Addrp) p );
case TEXPR:
if( ISCOMPLEX(p->exprblock.vtype) )
break;
++*ncommap;
resp = mktemp(TYDREAL, NO);
putassign( cpexpr(resp), p);
return(resp);
default:
badtag("putcx1", p->tag);
}
opcode = p->exprblock.opcode;
if(opcode==OPCALL || opcode==OPCCALL)
{
++*ncommap;
return( putcall(p) );
}
else if(opcode == OPASSIGN)
{
++*ncommap;
return( putcxeq(p) );
}
resp = mktemp(p->exprblock.vtype, PNULL);
if(lp = putcx1(p->exprblock.leftp, ncommap) )
ltype = lp->vtype;
if(rp = putcx1(p->exprblock.rightp, ncommap) )
rtype = rp->vtype;
switch(opcode)
{
case OPCOMMA:
frexpr(resp);
resp = rp;
rp = NULL;
break;
case OPNEG:
putassign( realpart(resp), mkexpr(OPNEG, realpart(lp), ENULL) );
putassign( imagpart(resp), mkexpr(OPNEG, imagpart(lp), ENULL) );
*ncommap += 2;
break;
case OPPLUS:
case OPMINUS:
putassign( realpart(resp),
mkexpr(opcode, realpart(lp), realpart(rp) ));
if(rtype < TYCOMPLEX)
putassign( imagpart(resp), imagpart(lp) );
else if(ltype < TYCOMPLEX)
{
if(opcode == OPPLUS)
putassign( imagpart(resp), imagpart(rp) );
else putassign( imagpart(resp),
mkexpr(OPNEG, imagpart(rp), ENULL) );
}
else
putassign( imagpart(resp),
mkexpr(opcode, imagpart(lp), imagpart(rp) ));
*ncommap += 2;
break;
case OPSTAR:
if(ltype < TYCOMPLEX)
{
if( ISINT(ltype) )
lp = intdouble(lp, ncommap);
putassign( realpart(resp),
mkexpr(OPSTAR, cpexpr(lp), realpart(rp) ));
putassign( imagpart(resp),
mkexpr(OPSTAR, cpexpr(lp), imagpart(rp) ));
}
else if(rtype < TYCOMPLEX)
{
if( ISINT(rtype) )
rp = intdouble(rp, ncommap);
putassign( realpart(resp),
mkexpr(OPSTAR, cpexpr(rp), realpart(lp) ));
putassign( imagpart(resp),
mkexpr(OPSTAR, cpexpr(rp), imagpart(lp) ));
}
else {
putassign( realpart(resp), mkexpr(OPMINUS,
mkexpr(OPSTAR, realpart(lp), realpart(rp)),
mkexpr(OPSTAR, imagpart(lp), imagpart(rp)) ));
putassign( imagpart(resp), mkexpr(OPPLUS,
mkexpr(OPSTAR, realpart(lp), imagpart(rp)),
mkexpr(OPSTAR, imagpart(lp), realpart(rp)) ));
}
*ncommap += 2;
break;
case OPSLASH:
/* fixexpr has already replaced all divisions
* by a complex by a function call
*/
if( ISINT(rtype) )
rp = intdouble(rp, ncommap);
putassign( realpart(resp),
mkexpr(OPSLASH, realpart(lp), cpexpr(rp)) );
putassign( imagpart(resp),
mkexpr(OPSLASH, imagpart(lp), cpexpr(rp)) );
*ncommap += 2;
break;
case OPCONV:
putassign( realpart(resp), realpart(lp) );
if( ISCOMPLEX(lp->vtype) )
q = imagpart(lp);
else if(rp != NULL)
q = (expptr) realpart(rp);
else
q = mkrealcon(TYDREAL, 0.0);
putassign( imagpart(resp), q);
*ncommap += 2;
break;
default:
badop("putcx1", opcode);
}
frexpr(lp);
frexpr(rp);
free( (charptr) p );
return(resp);
}
LOCAL putcxcmp(p)
register expptr p;
{
int opcode;
int ncomma;
register Addrp lp, rp;
expptr q;
if(p->tag != TEXPR)
badtag("putcxcmp", p->tag);
ncomma = 0;
opcode = p->exprblock.opcode;
lp = putcx1(p->exprblock.leftp, &ncomma);
rp = putcx1(p->exprblock.rightp, &ncomma);
q = mkexpr( opcode==OPEQ ? OPAND : OPOR ,
mkexpr(opcode, realpart(lp), realpart(rp)),
mkexpr(opcode, imagpart(lp), imagpart(rp)) );
putx( fixexpr(q) );
putcomma(ncomma, TYINT, NO);
free( (charptr) lp);
free( (charptr) rp);
free( (charptr) p );
}
\f
LOCAL Addrp putch1(p, ncommap)
register expptr p;
int * ncommap;
{
register Addrp t;
Addrp mktemp();
Addrp putconst();
switch(p->tag)
{
case TCONST:
return( putconst(p) );
case TADDR:
return( (Addrp) p );
case TEXPR:
++*ncommap;
switch(p->exprblock.opcode)
{
expptr q;
case OPCALL:
case OPCCALL:
t = putcall(p);
break;
case OPCONCAT:
t = mktemp(TYCHAR, ICON(lencat(p)) );
q = (expptr) cpexpr(p->headblock.vleng);
putcat( cpexpr(t), p );
/* put the correct length on the block */
frexpr(t->vleng);
t->vleng = q;
break;
case OPCONV:
if(!ISICON(p->exprblock.vleng)
|| p->exprblock.vleng->constblock.const.ci!=1
|| ! INT(p->exprblock.leftp->headblock.vtype) )
fatal("putch1: bad character conversion");
t = mktemp(TYCHAR, ICON(1) );
putop( mkexpr(OPASSIGN, cpexpr(t), p) );
break;
default:
badop("putch1", p->exprblock.opcode);
}
return(t);
default:
badtag("putch1", p->tag);
}
/* NOTREACHED */
}
\f
LOCAL putchop(p)
expptr p;
{
int ncomma;
ncomma = 0;
putaddr( putch1(p, &ncomma) , NO );
putcomma(ncomma, TYCHAR, YES);
}
LOCAL putcheq(p)
register expptr p;
{
int ncomma;
expptr lp, rp;
if(p->tag != TEXPR)
badtag("putcheq", p->tag);
ncomma = 0;
lp = p->exprblock.leftp;
rp = p->exprblock.rightp;
if( rp->tag==TEXPR && rp->exprblock.opcode==OPCONCAT )
putcat(lp, rp);
else if( ISONE(lp->headblock.vleng) && ISONE(rp->headblock.vleng) )
{
putaddr( putch1(lp, &ncomma) , YES );
putaddr( putch1(rp, &ncomma) , YES );
putcomma(ncomma, TYINT, NO);
p2op(P2ASSIGN, P2CHAR);
}
else
{
putx( call2(TYINT, "s_copy", lp, rp) );
putcomma(ncomma, TYINT, NO);
}
frexpr(p->exprblock.vleng);
free( (charptr) p );
}
LOCAL putchcmp(p)
register expptr p;
{
int ncomma;
expptr lp, rp;
if(p->tag != TEXPR)
badtag("putchcmp", p->tag);
ncomma = 0;
lp = p->exprblock.leftp;
rp = p->exprblock.rightp;
if(ISONE(lp->headblock.vleng) && ISONE(rp->headblock.vleng) )
{
putaddr( putch1(lp, &ncomma) , YES );
putaddr( putch1(rp, &ncomma) , YES );
p2op(ops2[p->exprblock.opcode], P2CHAR);
free( (charptr) p );
putcomma(ncomma, TYINT, NO);
}
else
{
p->exprblock.leftp = call2(TYINT,"s_cmp", lp, rp);
p->exprblock.rightp = ICON(0);
putop(p);
}
}
LOCAL putcat(lhs, rhs)
register Addrp lhs;
register expptr rhs;
{
int n, ncomma;
Addrp lp, cp;
ncomma = 0;
n = ncat(rhs);
lp = mktmpn(n, TYLENG, PNULL);
cp = mktmpn(n, TYADDR, PNULL);
n = 0;
putct1(rhs, lp, cp, &n, &ncomma);
putx( call4(TYSUBR, "s_cat", lhs, cp, lp, mkconv(TYLONG, ICON(n)) ) );
putcomma(ncomma, TYINT, NO);
}
LOCAL putct1(q, lp, cp, ip, ncommap)
register expptr q;
register Addrp lp, cp;
int *ip, *ncommap;
{
int i;
Addrp lp1, cp1;
if(q->tag==TEXPR && q->exprblock.opcode==OPCONCAT)
{
putct1(q->exprblock.leftp, lp, cp, ip, ncommap);
putct1(q->exprblock.rightp, lp, cp , ip, ncommap);
frexpr(q->exprblock.vleng);
free( (charptr) q );
}
else
{
i = (*ip)++;
lp1 = (Addrp) cpexpr(lp);
lp1->memoffset = mkexpr(OPPLUS,lp1->memoffset, ICON(i*SZLENG));
cp1 = (Addrp) cpexpr(cp);
cp1->memoffset = mkexpr(OPPLUS, cp1->memoffset, ICON(i*SZADDR));
putassign( lp1, cpexpr(q->headblock.vleng) );
putassign( cp1, addrof(putch1(q,ncommap)) );
*ncommap += 2;
}
}
\f
LOCAL putaddr(p, indir)
register Addrp p;
int indir;
{
int type, type2, funct;
ftnint offset, simoffset();
expptr offp, shorten();
if( p->tag==TERROR || (p->memoffset!=NULL && ISERROR(p->memoffset)) )
{
frexpr(p);
return;
}
type = p->vtype;
type2 = types2[type];
funct = (p->vclass==CLPROC ? P2FUNCT<<2 : 0);
offp = (p->memoffset ? (expptr) cpexpr(p->memoffset) : (expptr)NULL );
#if (FUDGEOFFSET != 1)
if(offp)
offp = mkexpr(OPSTAR, ICON(FUDGEOFFSET), offp);
#endif
offset = simoffset( &offp );
#if SZINT < SZLONG
if(offp)
if(shortsubs)
offp = shorten(offp);
else
offp = mkconv(TYINT, offp);
#else
if(offp)
offp = mkconv(TYINT, offp);
#endif
switch(p->vstg)
{
case STGAUTO:
if(indir && !offp)
{
p2oreg(offset, AUTOREG, type2);
break;
}
if(!indir && !offp && !offset)
{
p2reg(AUTOREG, type2 | P2PTR);
break;
}
p2reg(AUTOREG, type2 | P2PTR);
if(offp)
{
putx(offp);
if(offset)
p2icon(offset, P2INT);
}
else
p2icon(offset, P2INT);
if(offp && offset)
p2op(P2PLUS, type2 | P2PTR);
p2op(P2PLUS, type2 | P2PTR);
if(indir)
p2op(P2INDIRECT, type2);
break;
case STGARG:
p2oreg(
#ifdef ARGOFFSET
ARGOFFSET +
#endif
(ftnint) (FUDGEOFFSET*p->memno),
ARGREG, type2 | P2PTR | funct );
based:
if(offp)
putx(offp);
if(offset)
{
p2icon(offset, P2INT);
p2op(P2PLUS, type2 | P2PTR);
}
if(offp)
p2op(P2PLUS, type2 | P2PTR);
if(indir)
p2op(P2INDIRECT, type2);
break;
case STGLENG:
if(indir)
{
p2oreg(
#ifdef ARGOFFSET
ARGOFFSET +
#endif
(ftnint) (FUDGEOFFSET*p->memno),
ARGREG, type2 );
}
else {
p2reg(ARGREG, type2 | P2PTR );
p2icon(
#ifdef ARGOFFSET
ARGOFFSET +
#endif
(ftnint) (FUDGEOFFSET*p->memno), P2INT);
p2op(P2PLUS, type2 | P2PTR );
}
break;
case STGBSS:
case STGINIT:
case STGEXT:
case STGCOMMON:
case STGEQUIV:
case STGCONST:
if(offp)
{
putx(offp);
putmem(p, P2ICON, offset);
p2op(P2PLUS, type2 | P2PTR);
if(indir)
p2op(P2INDIRECT, type2);
}
else
putmem(p, (indir ? P2NAME : P2ICON), offset);
break;
case STGREG:
if(indir)
p2reg(p->memno, type2);
else
fatal("attempt to take address of a register");
break;
/* for possible future use -- register based arrays
case STGPREG:
if(indir && !offp)
p2oreg(offset, p->memno, type2);
else
{
p2reg(p->memno, type2 | P2PTR);
goto based;
}
break;
*/
default:
badstg("putaddr", p->vstg);
}
frexpr(p);
}
LOCAL putmem(p, class, offset)
expptr p;
int class;
ftnint offset;
{
int type2;
int funct;
char *name, *memname();
funct = (p->headblock.vclass==CLPROC ? P2FUNCT<<2 : 0);
type2 = types2[p->headblock.vtype];
if(p->headblock.vclass == CLPROC)
type2 |= (P2FUNCT<<2);
name = memname(p->addrblock.vstg, p->addrblock.memno);
if(class == P2ICON)
{
p2triple(P2ICON, name[0]!='\0', type2|P2PTR);
p2word(offset);
if(name[0])
p2name(name);
}
else
{
p2triple(P2NAME, offset!=0, type2);
if(offset != 0)
p2word(offset);
p2name(name);
}
}
\f
LOCAL Addrp putcall(p)
register Exprp p;
{
chainp arglist, charsp, cp;
int n, first;
Addrp t;
register expptr q;
Addrp fval;
int type, type2, ctype, qtype, indir;
type2 = types2[type = p->vtype];
charsp = NULL;
indir = (p->opcode == OPCCALL);
n = 0;
first = YES;
if(p->rightp)
{
arglist = p->rightp->listblock.listp;
free( (charptr) (p->rightp) );
}
else
arglist = NULL;
for(cp = arglist ; cp ; cp = cp->nextp)
if(indir)
++n;
else {
q = (expptr) (cp->datap);
if( ISCONST(q) )
{
q = (expptr) putconst(q);
cp->datap = (tagptr) q;
}
if( ISCHAR(q) && q->headblock.vclass!=CLPROC )
{
charsp = hookup(charsp,
mkchain(cpexpr(q->headblock.vleng),
CHNULL));
n += 2;
}
else
n += 1;
}
if(type == TYCHAR)
{
if( ISICON(p->vleng) )
{
fval = mktemp(TYCHAR, p->vleng);
n += 2;
}
else {
err("adjustable character function");
return;
}
}
else if( ISCOMPLEX(type) )
{
fval = mktemp(type, PNULL);
n += 1;
}
else
fval = NULL;
ctype = (fval ? P2INT : type2);
putaddr(p->leftp, NO);
if(fval)
{
first = NO;
putaddr( cpexpr(fval), NO);
if(type==TYCHAR)
{
putx( mkconv(TYLENG,p->vleng) );
p2op(P2LISTOP, type2);
}
}
for(cp = arglist ; cp ; cp = cp->nextp)
{
q = (expptr) (cp->datap);
if(q->tag==TADDR && (indir || q->addrblock.vstg!=STGREG) )
putaddr(q, indir && q->addrblock.vtype!=TYCHAR);
else if( ISCOMPLEX(q->headblock.vtype) )
putcxop(q);
else if (ISCHAR(q) )
putchop(q);
else if( ! ISERROR(q) )
{
if(indir)
putx(q);
else {
t = mktemp(qtype = q->headblock.vtype,
q->headblock.vleng);
putassign( cpexpr(t), q );
putaddr(t, NO);
putcomma(1, qtype, YES);
}
}
if(first)
first = NO;
else
p2op(P2LISTOP, type2);
}
if(arglist)
frchain(&arglist);
for(cp = charsp ; cp ; cp = cp->nextp)
{
putx( mkconv(TYLENG,cp->datap) );
p2op(P2LISTOP, type2);
}
frchain(&charsp);
p2op(n>0 ? P2CALL : P2CALL0 , ctype);
free( (charptr) p );
return(fval);
}
LOCAL putmnmx(p)
register expptr p;
{
int op, type;
int ncomma;
expptr qp;
chainp p0, p1;
Addrp sp, tp;
if(p->tag != TEXPR)
badtag("putmnmx", p->tag);
type = p->exprblock.vtype;
op = (p->exprblock.opcode==OPMIN ? OPLT : OPGT );
p0 = p->exprblock.leftp->listblock.listp;
free( (charptr) (p->exprblock.leftp) );
free( (charptr) p );
sp = mktemp(type, PNULL);
tp = mktemp(type, PNULL);
qp = mkexpr(OPCOLON, cpexpr(tp), cpexpr(sp));
qp = mkexpr(OPQUEST, mkexpr(op, cpexpr(tp),cpexpr(sp)), qp);
qp = fixexpr(qp);
ncomma = 1;
putassign( cpexpr(sp), p0->datap );
for(p1 = p0->nextp ; p1 ; p1 = p1->nextp)
{
++ncomma;
putassign( cpexpr(tp), p1->datap );
if(p1->nextp)
{
++ncomma;
putassign( cpexpr(sp), cpexpr(qp) );
}
else
putx(qp);
}
putcomma(ncomma, type, NO);
frtemp(sp);
frtemp(tp);
frchain( &p0 );
}
LOCAL putcomma(n, type, indir)
int n, type, indir;
{
type = types2[type];
if(indir)
type |= P2PTR;
while(--n >= 0)
p2op(P2COMOP, type);
}
ftnint simoffset(p0)
expptr *p0;
{
ftnint offset, prod;
register expptr p, lp, rp;
offset = 0;
p = *p0;
if(p == NULL)
return(0);
if( ! ISINT(p->headblock.vtype) )
return(0);
if(p->tag==TEXPR && p->exprblock.opcode==OPSTAR)
{
lp = p->exprblock.leftp;
rp = p->exprblock.rightp;
if(ISICON(rp) && lp->tag==TEXPR &&
lp->exprblock.opcode==OPPLUS && ISICON(lp->exprblock.rightp))
{
p->exprblock.opcode = OPPLUS;
lp->exprblock.opcode = OPSTAR;
prod = rp->constblock.const.ci *
lp->exprblock.rightp->constblock.const.ci;
lp->exprblock.rightp->constblock.const.ci = rp->constblock.const.ci;
rp->constblock.const.ci = prod;
}
}
if(p->tag==TEXPR && p->exprblock.opcode==OPPLUS &&
ISICON(p->exprblock.rightp))
{
rp = p->exprblock.rightp;
lp = p->exprblock.leftp;
offset += rp->constblock.const.ci;
frexpr(rp);
free( (charptr) p );
*p0 = lp;
}
if( ISCONST(p) )
{
offset += p->constblock.const.ci;
frexpr(p);
*p0 = NULL;
}
return(offset);
}
\f
p2op(op, type)
int op, type;
{
p2triple(op, 0, type);
}
p2icon(offset, type)
ftnint offset;
int type;
{
p2triple(P2ICON, 0, type);
p2word(offset);
}
p2oreg(offset, reg, type)
ftnint offset;
int reg, type;
{
p2triple(P2OREG, reg, type);
p2word(offset);
p2name("");
}
p2reg(reg, type)
int reg, type;
{
p2triple(P2REG, reg, type);
}
p2pi(s, i)
char *s;
int i;
{
char buff[100];
sprintf(buff, s, i);
p2pass(buff);
}
p2pij(s, i, j)
char *s;
int i, j;
{
char buff[100];
sprintf(buff, s, i, j);
p2pass(buff);
}
p2ps(s, t)
char *s, *t;
{
char buff[100];
sprintf(buff, s, t);
p2pass(buff);
}
p2pass(s)
char *s;
{
p2triple(P2PASS, (strlen(s) + FOUR-1)/FOUR, 0);
p2str(s);
}
p2str(s)
register char *s;
{
union { long int word; char str[FOUR]; } u;
register int i;
i = 0;
u.word = 0;
while(*s)
{
u.str[i++] = *s++;
if(i == FOUR)
{
p2word(u.word);
u.word = 0;
i = 0;
}
}
if(i > 0)
p2word(u.word);
}
p2triple(op, var, type)
int op, var, type;
{
register long word;
word = op | (var<<8);
word |= ( (long int) type) <<16;
p2word(word);
}
p2name(s)
register char *s;
{
register int i;
#ifdef UCBPASS2
/* arbitrary length names, terminated by a null,
padded to a full word */
# define WL sizeof(long int)
union { long int word; char str[WL]; } w;
w.word = 0;
i = 0;
while(w.str[i++] = *s++)
if(i == WL)
{
p2word(w.word);
w.word = 0;
i = 0;
}
if(i > 0)
p2word(w.word);
#else
/* standard intermediate, names are 8 characters long */
union { long int word[2]; char str[8]; } u;
u.word[0] = u.word[1] = 0;
for(i = 0 ; i<8 && *s ; ++i)
u.str[i] = *s++;
p2word(u.word[0]);
p2word(u.word[1]);
#endif
}
p2word(w)
long int w;
{
*p2bufp++ = w;
if(p2bufp >= p2bufend)
p2flush();
}
p2flush()
{
if(p2bufp > p2buff)
write(fileno(textfile), p2buff, (p2bufp-p2buff)*sizeof(long int));
p2bufp = p2buff;
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.