You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
5.6 KiB
101 lines
5.6 KiB
2 years ago
|
#ifndef CACHE_GENERIC_H
|
||
|
|
#define CACHE_GENERIC_H
|
||
|
|
|
||
|
|
|
||
|
|
#include "hash.h"
|
||
|
|
|
||
|
|
#define CACHE_SIZE 512
|
||
|
|
#define CACHE_NCYCLES (CACHE_SIZE/2)
|
||
|
|
#define CACHE_BSIZE (((CACHE_SIZE+0x3f)&(~0x3f))>>6)
|
||
|
|
#define CACHE_BRESET(b) for (int i = 0; i < CACHE_BSIZE; b[i++] = 0);
|
||
|
|
#define CACHE_BSET(b, x) b[(x)>>6] |= (uint64_t)1<<((x)%64)
|
||
|
|
#define CACHE_BTEST(b, x) (b[(x)>>6]&((uint64_t)1<<((x)%64)))
|
||
|
|
|
||
|
|
#define CACHE_SET(c, x) \
|
||
|
|
{ \
|
||
|
|
c->cycles = (c->cycles+1)%CACHE_NCYCLES; \
|
||
|
|
if (!c->cycles) CACHE_BRESET(c->bitmap); \
|
||
|
|
CACHE_BSET(c->bitmap, x); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define CACHE_DECL(cachename, type) \
|
||
|
|
struct cachename { \
|
||
|
|
struct hm_ref *table; \
|
||
|
|
type *array; \
|
||
|
|
uint64_t *bitmap; \
|
||
|
|
int cycles; \
|
||
|
|
}; \
|
||
|
|
\
|
||
|
|
\
|
||
|
|
struct cachename cachename##_init(void) \
|
||
|
|
{ \
|
||
|
|
struct hm_ref *t = hm_create(CACHE_SIZE); \
|
||
|
|
type *a = malloc(sizeof(type)*CACHE_SIZE); \
|
||
|
|
uint64_t *b = malloc(sizeof(uint64_t)*CACHE_BSIZE); \
|
||
|
|
CACHE_BRESET(b); \
|
||
|
|
return (struct cachename){ .table = t, .array = a, .bitmap = b, 0}; \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
\
|
||
|
|
void cachename##_free(struct cachename *cache) \
|
||
|
|
{ \
|
||
|
|
if (cache) { \
|
||
|
|
hm_destroy(cache->table); \
|
||
|
|
free(cache->array); \
|
||
|
|
free(cache->bitmap); \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
\
|
||
|
|
const type * cachename##_search(struct cachename *cache, unsigned int code) \
|
||
|
|
{ \
|
||
|
|
if (!cache) \
|
||
|
|
return NULL; \
|
||
|
|
struct hm_entry *r = hm_search(cache->table, code); \
|
||
|
|
/* MISS */ \
|
||
|
|
if (!r) \
|
||
|
|
return NULL; \
|
||
|
|
/* HIT */ \
|
||
|
|
CACHE_SET(cache, (type *)(r->data)-cache->array); \
|
||
|
|
return (const type *)(r->data); \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
\
|
||
|
|
int cachename##_get(struct cachename *cache) \
|
||
|
|
{ \
|
||
|
|
if (!cache) \
|
||
|
|
return -1; \
|
||
|
|
int x = 0; \
|
||
|
|
for (int b = 0; b < CACHE_BSIZE; b++) { \
|
||
|
|
if (cache->bitmap[b] == 0) x = 64; \
|
||
|
|
else x = __builtin_clzll(cache->bitmap[b]); \
|
||
|
|
x = 64-x; \
|
||
|
|
if (!CACHE_BTEST(cache->bitmap, x+64*b)) \
|
||
|
|
return x+64*b; \
|
||
|
|
} \
|
||
|
|
return 0; \
|
||
|
|
} \
|
||
|
|
\
|
||
|
|
\
|
||
|
|
const type * cachename##_insert(struct cachename *cache, const type *g, unsigned int code, int x) \
|
||
|
|
{ \
|
||
|
|
if (!cache) \
|
||
|
|
return NULL; \
|
||
|
|
type *spot = NULL; \
|
||
|
|
/* x is the index to the cache array, it has to come from the user */ \
|
||
|
|
/* check if the spot is free */ \
|
||
|
|
if (x < 0 || CACHE_BTEST(cache->bitmap, x)) \
|
||
|
|
return NULL; \
|
||
|
|
CACHE_SET(cache, x) \
|
||
|
|
spot = &(cache->array[x]); \
|
||
|
|
*spot = *g; \
|
||
|
|
struct hm_entry e = { .code = code, .data = spot}; \
|
||
|
|
if (!hm_insert(cache->table, &e)) \
|
||
|
|
return NULL; \
|
||
|
|
return spot; \
|
||
|
|
} \
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|