GPR_CONTROL_WRITE
if (val & GPR_CONTROL_WRITE)
val |= CWE_21143, val &= ~GPR_CONTROL_WRITE;
if (val & GPR_CONTROL_WRITE)
val |= CWE_21140, val &= ~GPR_CONTROL_WRITE;
write_gpr(dnetp, leaf->gpr | GPR_CONTROL_WRITE);
block->gprseq[0] |= GPR_CONTROL_WRITE;
block->gprseq[0] |= GPR_CONTROL_WRITE;