riscv_preempt_v_started
if (!riscv_preempt_v_started(current))
if (riscv_preempt_v_started(prev)) {
if (riscv_preempt_v_started(next)) {
if (riscv_v_ctx_get_depth() != 0 || !riscv_preempt_v_started(current))
if (riscv_preempt_v_started(current)) {
if (!riscv_preempt_v_started(current))
if (!riscv_preempt_v_started(current))