REG_O4
ps->pr_lwp.pr_reg[R_O4] = cp->user.u_reg[REG_O4];
ps->pr_lwp.pr_reg[R_O4] = cp->user.u_reg[REG_O4];
cp->user.u_reg[REG_O4] = ps->pr_lwp.pr_reg[R_O4];
dst[R_O4] = gregs[REG_O4];
dst[R_O4] = gregs[REG_O4];
dst[R_O4] = (uint64_t)(uint32_t)gregs[REG_O4];
prp[R_O4] = gr[REG_O4];
gr[REG_O4] = prp[R_O4];
prp[R_O4] = gr[REG_O4];
rp->r_o4 = grp[REG_O4];
grp[REG_O4] = rp->r_o4;
grp[REG_O4] = rp->r_o4;