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Fix off-by-one in size calculations

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This commit is contained in:
Stella Lau 2017-07-19 17:24:09 -07:00
parent 2427a154cb
commit 13a01ffb27
4 changed files with 10 additions and 9 deletions
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3
contrib/long_distance_matching/circular_buffer_table.c
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@ -11,7 +11,8 @@
#define HASH_BUCKET_SIZE (1 << (HASH_BUCKET_SIZE_LOG)) #define HASH_BUCKET_SIZE (1 << (HASH_BUCKET_SIZE_LOG))
// TODO: rename. Number of hash buckets. // TODO: rename. Number of hash buckets.
#define LDM_HASHLOG ((LDM_MEMORY_USAGE)-4-HASH_BUCKET_SIZE_LOG) // TODO: Link to HASH_ENTRY_SIZE_LOG
#define LDM_HASHLOG ((LDM_MEMORY_USAGE)-3-(HASH_BUCKET_SIZE_LOG))
//#define ZSTD_SKIP //#define ZSTD_SKIP
struct LDM_hashTable { struct LDM_hashTable {

6
contrib/long_distance_matching/ldm.c
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@ -6,12 +6,12 @@
#define LDM_HASHTABLESIZE (1 << (LDM_MEMORY_USAGE)) #define LDM_HASHTABLESIZE (1 << (LDM_MEMORY_USAGE))
//#define LDM_HASH_ENTRY_SIZE 4 #define LDM_HASH_ENTRY_SIZE_LOG 3
#define LDM_HASHTABLESIZE_U32 ((LDM_HASHTABLESIZE) >> 2) #define LDM_HASHTABLESIZE_U32 ((LDM_HASHTABLESIZE) >> 2)
#define LDM_HASHTABLESIZE_U64 ((LDM_HASHTABLESIZE) >> 4) #define LDM_HASHTABLESIZE_U64 ((LDM_HASHTABLESIZE) >> 3)
// Insert every (HASH_ONLY_EVERY + 1) into the hash table. // Insert every (HASH_ONLY_EVERY + 1) into the hash table.
#define HASH_ONLY_EVERY_LOG (LDM_WINDOW_SIZE_LOG-((LDM_MEMORY_USAGE) - 4)) #define HASH_ONLY_EVERY_LOG (LDM_WINDOW_SIZE_LOG-((LDM_MEMORY_USAGE) - (LDM_HASH_ENTRY_SIZE_LOG)))
#define HASH_ONLY_EVERY ((1 << HASH_ONLY_EVERY_LOG) - 1) #define HASH_ONLY_EVERY ((1 << HASH_ONLY_EVERY_LOG) - 1)
#define ML_BITS 4 #define ML_BITS 4

2
contrib/long_distance_matching/ldm.h
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@ -13,7 +13,7 @@
// Defines the size of the hash table. // Defines the size of the hash table.
// Note that this is not the number of buckets. // Note that this is not the number of buckets.
// Currently this should be less than WINDOW_SIZE_LOG + 4? // Currently this should be less than WINDOW_SIZE_LOG + 4?
#define LDM_MEMORY_USAGE 23 #define LDM_MEMORY_USAGE 22
#define HASH_BUCKET_SIZE_LOG 3 // MAX is 4 for now #define HASH_BUCKET_SIZE_LOG 3 // MAX is 4 for now
// Defines the lag in inserting elements into the hash table. // Defines the lag in inserting elements into the hash table.

8
contrib/long_distance_matching/ldm_with_table.c
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@ -7,17 +7,17 @@
#include "ldm.h" #include "ldm.h"
#define LDM_HASHTABLESIZE (1 << (LDM_MEMORY_USAGE)) #define LDM_HASHTABLESIZE (1 << (LDM_MEMORY_USAGE))
//#define LDM_HASH_ENTRY_SIZE 4 #define LDM_HASH_ENTRY_SIZE_LOG 3
#define LDM_HASHTABLESIZE_U32 ((LDM_HASHTABLESIZE) >> 2) #define LDM_HASHTABLESIZE_U32 ((LDM_HASHTABLESIZE) >> 2)
#define LDM_HASHTABLESIZE_U64 ((LDM_HASHTABLESIZE) >> 4) #define LDM_HASHTABLESIZE_U64 ((LDM_HASHTABLESIZE) >> 3)
// Insert every (HASH_ONLY_EVERY + 1) into the hash table. // Insert every (HASH_ONLY_EVERY + 1) into the hash table.
#define HASH_ONLY_EVERY_LOG (LDM_WINDOW_SIZE_LOG-((LDM_MEMORY_USAGE) - 4)) #define HASH_ONLY_EVERY_LOG (LDM_WINDOW_SIZE_LOG-((LDM_MEMORY_USAGE) - (LDM_HASH_ENTRY_SIZE_LOG)))
#define HASH_ONLY_EVERY ((1 << HASH_ONLY_EVERY_LOG) - 1) #define HASH_ONLY_EVERY ((1 << HASH_ONLY_EVERY_LOG) - 1)
/* Hash table stuff. */ /* Hash table stuff. */
#define HASH_BUCKET_SIZE (1 << (HASH_BUCKET_SIZE_LOG)) #define HASH_BUCKET_SIZE (1 << (HASH_BUCKET_SIZE_LOG))
#define LDM_HASHLOG ((LDM_MEMORY_USAGE)-4-HASH_BUCKET_SIZE_LOG) #define LDM_HASHLOG ((LDM_MEMORY_USAGE)-(LDM_HASH_ENTRY_SIZE_LOG)-(HASH_BUCKET_SIZE_LOG))
#define ML_BITS 4 #define ML_BITS 4
#define ML_MASK ((1U<<ML_BITS)-1) #define ML_MASK ((1U<<ML_BITS)-1)