INTEL_PMC_MSK_TOPDOWN
if (c1->idxmsk64 & INTEL_PMC_MSK_TOPDOWN)
if (c2->idxmsk64 & INTEL_PMC_MSK_TOPDOWN ||
if (c->idxmsk64 & INTEL_PMC_MSK_TOPDOWN) {
(~(0x1ull << bit) & INTEL_PMC_MSK_TOPDOWN)