You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
252 lines
3.1 KiB
252 lines
3.1 KiB
retseq()
|
|
{
|
|
printf("jmp retrn\n");
|
|
}
|
|
|
|
decref(t)
|
|
{
|
|
|
|
if ((t & 077770) == 0) {
|
|
error("Illegal indirection");
|
|
return(t);
|
|
}
|
|
return((t>>2) & 077770 | t&07);
|
|
}
|
|
|
|
incref(t)
|
|
{
|
|
return((t<<2)&077740 | (t&07) | 010);
|
|
}
|
|
|
|
jumpc(tree, lbl, cond)
|
|
int tree[];
|
|
{
|
|
extern cctab, block, rcexpr;
|
|
|
|
rcexpr(block(1,easystmt()+103,tree,lbl,cond),cctab);
|
|
}
|
|
|
|
rcexpr(tree, table)
|
|
int tree[], table;
|
|
{
|
|
extern space, putwrd, putchar, line;
|
|
int c, sp[];
|
|
|
|
if (tree == 0)
|
|
return;
|
|
putchar('#');
|
|
c = space;
|
|
c =/ 2; /* # addresses per word */
|
|
sp = 0;
|
|
putwrd(c);
|
|
putwrd(tree);
|
|
putwrd(table);
|
|
putwrd(line);
|
|
while(c--)
|
|
putwrd(*sp++);
|
|
}
|
|
|
|
jump(lab) {
|
|
extern printf;
|
|
|
|
printf("jmp\tl%d\n", lab);
|
|
}
|
|
|
|
label(l) {
|
|
extern printf;
|
|
|
|
printf("L%d:", l);
|
|
}
|
|
|
|
setstk(a) {
|
|
extern printf, stack;
|
|
auto ts;
|
|
|
|
ts = a-stack;
|
|
stack = a;
|
|
switch(ts) {
|
|
|
|
case 0:
|
|
return;
|
|
|
|
case 0177776: /* -2 */
|
|
printf("tst -(sp)\n");
|
|
return;
|
|
|
|
case 0177774: /* -4 */
|
|
printf("cmp -(sp),-(sp)\n");
|
|
return;
|
|
}
|
|
printf("add $%o,sp\n", ts);
|
|
}
|
|
|
|
plength(p)
|
|
int p[];
|
|
{
|
|
int t, l;
|
|
|
|
if (((t=p[1])&077770) == 0) /* not a reference */
|
|
return(1);
|
|
p[1] = decref(t);
|
|
l = length(p);
|
|
p[1] = t;
|
|
return(l);
|
|
}
|
|
|
|
length(cs)
|
|
int cs[];
|
|
{
|
|
extern hshtab[];
|
|
int t;
|
|
|
|
t = cs[1];
|
|
if ((t&030) == 030) /* array */
|
|
t = decref(t);
|
|
if (t>=010)
|
|
return(2);
|
|
switch(t&07) {
|
|
|
|
case 0: /* int */
|
|
return(2);
|
|
|
|
case 1: /* char */
|
|
return(1);
|
|
|
|
case 2: /* float */
|
|
return(4);
|
|
|
|
case 3: /* double */
|
|
return(8);
|
|
|
|
case 4: /* structure */
|
|
if (cs>=hshtab) /* in namelist */
|
|
return(cs[3]);
|
|
return(getlen(cs));
|
|
|
|
case 5:
|
|
error("Bad structure");
|
|
return(0);
|
|
}
|
|
error("Compiler error (length)");
|
|
}
|
|
|
|
getlen(p)
|
|
int p[];
|
|
{
|
|
int p1[];
|
|
|
|
switch(*p) {
|
|
|
|
case 20: /* name */
|
|
return(p[2]);
|
|
|
|
case 35:
|
|
case 29: /* & */
|
|
case 36: /* * */
|
|
case 100: /* call */
|
|
case 41: /* - */
|
|
return(getlen(p[3]));
|
|
|
|
case 40: /* + */
|
|
p1 = p[4];
|
|
if ((p1[1]&07) == 04)
|
|
return(getlen(p1));
|
|
return(getlen(p[3]));
|
|
}
|
|
error("Unimplemented pointer conversion");
|
|
return(0);
|
|
}
|
|
|
|
rlength(cs)
|
|
int cs[];
|
|
{
|
|
auto l;
|
|
|
|
if (((l=length(cs))&01) != 0)
|
|
l++;
|
|
return(l);
|
|
}
|
|
|
|
tlength(cs)
|
|
int cs[];
|
|
{
|
|
int nel;
|
|
|
|
if ((nel = cs[8]) == 0)
|
|
nel = 1;
|
|
return(length(cs)*nel);
|
|
}
|
|
|
|
trlength(cs)
|
|
int cs[];
|
|
{
|
|
int l;
|
|
|
|
if (((l=tlength(cs))&01) != 0)
|
|
l++;
|
|
return(l);
|
|
}
|
|
|
|
printn(n,b) {
|
|
extern putchar;
|
|
auto a;
|
|
|
|
if(a=n/b) /* assignment, not test for equality */
|
|
printn(a, b); /* recursive */
|
|
putchar(n%b + '0');
|
|
}
|
|
|
|
printf(fmt,x1,x2,x3,x4,x5,x6,x7,x8,x9)
|
|
char fmt[]; {
|
|
extern printn, putchar, namsiz, ncpw;
|
|
char s[];
|
|
auto adx[], x, c, i[];
|
|
|
|
adx = &x1; /* argument pointer */
|
|
loop:
|
|
while((c = *fmt++) != '%') {
|
|
if(c == '\0')
|
|
return;
|
|
putchar(c);
|
|
}
|
|
x = *adx++;
|
|
switch (c = *fmt++) {
|
|
|
|
case 'd': /* decimal */
|
|
case 'o': /* octal */
|
|
if(x < 0) {
|
|
x = -x;
|
|
if(x<0) { /* - infinity */
|
|
if(c=='o')
|
|
printf("100000");
|
|
else
|
|
printf("-32767");
|
|
goto loop;
|
|
}
|
|
putchar('-');
|
|
}
|
|
printn(x, c=='o'?8:10);
|
|
goto loop;
|
|
|
|
case 's': /* string */
|
|
s = x;
|
|
while(c = *s++)
|
|
putchar(c);
|
|
goto loop;
|
|
|
|
case 'p':
|
|
s = x;
|
|
putchar('_');
|
|
c = namsiz;
|
|
while(c--)
|
|
if (*s)
|
|
putchar((*s++)&0177);
|
|
goto loop;
|
|
}
|
|
putchar('%');
|
|
fmt--;
|
|
adx--;
|
|
goto loop;
|
|
}
|
|
|