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/*% cc -std=c99 -Wall -DTEST_PMOV -g -o # %
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../rega.c"
int
main()
{
Blk dummyb;
Ins ins[NReg], *ip, *i1;
unsigned long long tm, rm;
RMap mbeg, mend;
int reg[NReg];
int t, i, r, nr;
tmp = (Tmp[Tmp0+NReg]){{0}};
for (t=0; t<Tmp0+NReg; t++)
if (t < Tmp0)
tmp[t] = (Tmp){.type = TReg};
else {
tmp[t].type = TLong;
tmp[t].hint = -1;
sprintf(tmp[t].name, "tmp%d", t-Tmp0+1);
}
dummyb.ins = ins;
strcpy(dummyb.name, "dummy");
for (tm = 0; tm < 1ull << (2*NReg); tm++) {
mbeg.n = 0;
mbeg.b = (Bits){{0}};
ip = ins;
/* find what temporaries are in copy and
* wether or not they are in register
*/
for (t=0; t<NReg; t++)
switch ((tm >> (2*t)) & 3) {
case 0:
/* not in copy, not in use */
break;
case 1:
/* not in copy, in use */
radd(&mbeg, Tmp0+t, t+1);
break;
case 2:
/* in copy, not in reg */
*ip++ = (Ins){OCopy, TMP(Tmp0+t), {R, R}};
break;
case 3:
/* in copy, in reg */
*ip++ = (Ins){OCopy, TMP(Tmp0+t), {R, R}};
radd(&mbeg, Tmp0+t, t+1);
break;
}
if (ip == ins)
/* cancel is the parallel move
* is empty
*/
goto Nxt;
/* find registers for temporaries
* in mbeg
*/
nr = ip - ins;
dummyb.nins = nr;
rm = (1ull << (nr+1)) - 1;
for (i=0; i<nr; i++)
reg[i] = i+1;
for (;;) {
/* set registers on copies
*/
for (i=0, i1=ins; i1<ip; i1++, i++)
i1->arg[0] = TMP(reg[i]);
#if 0
for (i=0; i<nr; i++)
printf("%d ", reg[i]);
printf("\n");
#endif
/* compile the parallel move
*/
mend = mbeg;
dopm(&dummyb, ip-1, &mend);
// TODO
/* check that mend contain mappings for
* source registers and does not map any
* assigned temporary
*/
// TODO
/* execute the code generated and check
* that all assigned temporaries got their
* value
*/
/* find the next register assignment */
i = nr - 1;
for (;;) {
r = reg[i];
rm &= ~(1ull<<r);
do
r++;
while (r <= NReg && (rm & (1ull<<r)));
if (r == NReg+1) {
if (i == 0)
goto Nxt;
i--;
} else {
rm |= (1ull<<r);
reg[i++] = r;
break;
}
}
for (; i<nr; i++)
for (r=1; r<=NReg; r++)
if (!(rm & (1ull<<r))) {
rm |= (1ull<<r);
reg[i] = r;
break;
}
}
Nxt: ;
}
exit(0);
}
/* symbols required by the linker */
char debug['Z'+1];
Ins insb[NIns], *curi;
void diag(char *s)
{ printf("!diag failure: %s\n", s); exit(1); }
void *alloc(size_t n)
{ return malloc(n); }
Blk *blocka()
{ printf("!blocka called\n"); exit(1); }
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