SPCPC_RD
rp->nb.fat_fbd_regs.spcpc = SPCPC_RD(branch);
rp->nb.nf_fbd_regs.spcpc = SPCPC_RD(branch);
rp->nb.nf_mem_regs.spcpc = SPCPC_RD(branch);
spcpc = SPCPC_RD(i);
spcpc = SPCPC_RD(i);