#include "sjeng.h"
#include "protos.h"
#include "extvars.h"
typedef struct
{
uint32_t stored_hash;
uint32_t hold_hash;
int32_t score;
} ECacheType;
ECacheType *ECache;
uint32_t ECacheProbes;
uint32_t ECacheHits;
void storeECache(int32_t score)
{
int index;
index = hash % ECacheSize;
ECache[index].stored_hash = hash;
ECache[index].hold_hash = hold_hash;
ECache[index].score = score;
}
void checkECache(int32_t *score, int *in_cache)
{
int index;
ECacheProbes++;
index = hash % ECacheSize;
if(ECache[index].stored_hash == hash &&
ECache[index].hold_hash == hold_hash)
{
ECacheHits++;
*in_cache = 1;
*score = ECache[index].score;
}
}
void reset_ecache(void)
{
memset(ECache, 0, sizeof(ECache));
return;
}
void alloc_ecache(void)
{
ECache = (ECacheType*)malloc(sizeof(ECacheType)*ECacheSize);
if (ECache == NULL)
{
printf("Out of memory allocating ECache.\n");
exit(EXIT_FAILURE);
}
printf("Allocated %u eval cache entries, totalling %u bytes.\n",
(uint32_t)ECacheSize, (uint32_t)(sizeof(ECacheType)*ECacheSize));
return;
}
void free_ecache(void)
{
free(ECache);
return;
}