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Remove dead code when the target processor has POPCNT instruction.

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This commit is contained in:
Jung-uk Kim 2016-01-13 19:19:50 +00:00
parent 4b09a8fdbc
commit 4ec1c9bfac
1 changed files with 4 additions and 1 deletions
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5
sys/amd64/amd64/pmap.c
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@ -3018,11 +3018,14 @@ reserve_pv_entries(pmap_t pmap, int needed, struct rwlock **lockp)
retry:
avail = 0;
TAILQ_FOREACH(pc, &pmap->pm_pvchunk, pc_list) {
#ifndef __POPCNT__
if ((cpu_feature2 & CPUID2_POPCNT) == 0) {
free = bitcount64(pc->pc_map[0]);
free += bitcount64(pc->pc_map[1]);
free += bitcount64(pc->pc_map[2]);
} else {
} else
#endif
{
free = popcnt_pc_map_elem_pq(pc->pc_map[0]);
free += popcnt_pc_map_elem_pq(pc->pc_map[1]);
free += popcnt_pc_map_elem_pq(pc->pc_map[2]);