37 lines
1.0 KiB
C
37 lines
1.0 KiB
C
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#ifndef SS_PT_LOOKUP_BOX_H
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#define SS_PT_LOOKUP_BOX_H
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#include "ss_pt_types_box.h"
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#include "ss_pt_env_box.h"
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// O(1) lookup (hot path, lock-free)
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static inline struct SuperSlab* ss_pt_lookup(void* addr) {
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uintptr_t p = (uintptr_t)addr;
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// Out-of-range check (>> 48 for LA57 compatibility)
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if (__builtin_expect(p >> 48, 0)) {
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if (hak_ss_pt_stats_enabled()) t_ss_pt_stats.pt_out_of_range++;
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return NULL; // Fallback to hash handled by caller
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}
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uint32_t l1_idx = SS_PT_L1_INDEX(addr);
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uint32_t l2_idx = SS_PT_L2_INDEX(addr);
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// L1 load (acquire)
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SsPtL2* l2 = atomic_load_explicit(&g_ss_pt.l2[l1_idx], memory_order_acquire);
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if (__builtin_expect(l2 == NULL, 0)) {
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if (hak_ss_pt_stats_enabled()) t_ss_pt_stats.pt_miss++;
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return NULL;
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}
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// L2 load (acquire)
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struct SuperSlab* ss = atomic_load_explicit(&l2->entries[l2_idx], memory_order_acquire);
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if (hak_ss_pt_stats_enabled()) {
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if (ss) t_ss_pt_stats.pt_hit++;
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else t_ss_pt_stats.pt_miss++;
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}
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return ss;
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}
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#endif
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