mapreg
sp = mapreg(c);
rnext = mapreg(c)->rg_first;
return (mapreg(c)->rg_flags);
mapreg(c)->rg_flags = 0;
strp = sp = mapreg(c);
copy(mapreg(i+1), mapreg(i), sizeof (struct strreg));
rnext = mapreg(c)->rg_first;
rnext = mapreg(k)->rg_first;
rnext = mapreg(k)->rg_first;