3 * File name: ir/ir/distrib.c
4 * Purpose: Statistics for Firm. Distribution tables.
8 * Copyright: (c) 2004 Universität Karlsruhe
9 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
18 #include "firmstat_t.h"
21 * calculates a hash value for an address
23 static unsigned addr_hash(const void *object)
25 return HASH_PTR(object);
29 * calculates a hash value for an integer
31 static unsigned int_hash(const void *object)
33 return (unsigned)PTR_TO_INT(object);
37 * compare function for integer distribution tables
39 static int int_cmp_fun(const void *elt, const void *key)
41 const distrib_entry_t *p1 = elt;
42 const distrib_entry_t *p2 = key;
44 return (char *)p1->object - (char *)p2->object;
48 * create a new distribution table
50 distrib_tbl_t *stat_new_distrib_tbl(pset_cmp_fun cmp_func, distrib_hash_fun hash_func)
54 res = xmalloc(sizeof(*res));
56 obstack_init(&res->cnts);
58 /* create the hash-table */
59 res->hash_map = new_pset(cmp_func, 8);
60 res->hash_func = hash_func ? hash_func : addr_hash;
67 * create a new distribution table for an integer distribution
69 distrib_tbl_t *stat_new_int_distrib_tbl(void)
71 distrib_tbl_t *res = stat_new_distrib_tbl(int_cmp_fun, int_hash);
80 * destroy a distribution table
82 void stat_delete_distrib_tbl(distrib_tbl_t *tbl)
85 /* free all entries */
86 obstack_free(&tbl->cnts, NULL);
88 /* delete the hash table */
89 del_pset(tbl->hash_map);
94 * Returns the associates distrib_entry_t for an object
96 static distrib_entry_t *distrib_get_entry(distrib_tbl_t *tbl, const void *object)
99 distrib_entry_t *elem;
103 elem = pset_find(tbl->hash_map, &key, tbl->hash_func(object));
107 elem = obstack_alloc(&tbl->cnts, sizeof(*elem));
112 elem->object = object;
114 return pset_insert(tbl->hash_map, elem, tbl->hash_func(object));
118 * adds a new object count into the distribution table
120 void stat_add_distrib_tbl(distrib_tbl_t *tbl, const void *object, const counter_t *cnt)
122 distrib_entry_t *elem = distrib_get_entry(tbl, object);
124 cnt_add(&elem->cnt, cnt);
128 * adds a new key count into the integer distribution table
130 void stat_add_int_distrib_tbl(distrib_tbl_t *tbl, int key, const counter_t *cnt)
132 stat_add_distrib_tbl(tbl, (const void *)key, cnt);
136 * increases object count by one
138 void stat_inc_distrib_tbl(distrib_tbl_t *tbl, const void *object)
140 distrib_entry_t *elem = distrib_get_entry(tbl, object);
146 * increases key count by one
148 void stat_inc_int_distrib_tbl(distrib_tbl_t *tbl, int key)
150 stat_inc_distrib_tbl(tbl, (const void *)key);
154 * inserts a new object with count 0 into the distribution table
155 * if object is already present, nothing happens
157 void stat_insert_distrib_tbl(distrib_tbl_t *tbl, const void *object)
159 /* executed for side effect */
160 (void)distrib_get_entry(tbl, object);
164 * inserts a new key with count 0 into the integer distribution table
165 * if key is already present, nothing happens
167 void stat_insert_int_distrib_tbl(distrib_tbl_t *tbl, int key)
169 stat_insert_distrib_tbl(tbl, (const void *)key);
173 * returns the sum over all counters in a distribution table
175 int stat_get_count_distrib_tbl(distrib_tbl_t *tbl)
177 distrib_entry_t *entry;
178 counter_t cnt = ZERO_CNT;
180 foreach_pset(tbl->hash_map, entry)
181 cnt_add(&cnt, &entry->cnt);
182 return cnt_to_uint(&cnt);
186 * calculates the mean value of a distribution
188 double stat_calc_mean_distrib_tbl(distrib_tbl_t *tbl)
190 distrib_entry_t *entry;
195 /* integer distribution, need min, max */
198 entry = pset_first(tbl->hash_map);
204 max = (int)entry->object;
205 sum = cnt_to_dbl(&entry->cnt);
208 for (entry = pset_next(tbl->hash_map); entry; entry = pset_next(tbl->hash_map)) {
209 int value = (int)entry->object;
216 sum += cnt_to_dbl(&entry->cnt);
218 count = max - min + 1;
223 foreach_pset(tbl->hash_map, entry) {
224 sum += cnt_to_dbl(&entry->cnt);
229 return count ? sum / (double)count : 0.0;
233 * calculates the average value of a distribution
235 double stat_calc_avg_distrib_tbl(distrib_tbl_t *tbl)
237 distrib_entry_t *entry;
242 if (pset_count(tbl->hash_map) <= 0)
245 foreach_pset(tbl->hash_map, entry) {
246 sum += cnt_to_dbl(&entry->cnt) * (int)entry->object;
247 count += cnt_to_uint(&entry->cnt);
251 foreach_pset(tbl->hash_map, entry) {
252 sum += cnt_to_dbl(&entry->cnt);
257 return count ? sum / (double)count : 0.0;
261 * iterates over all entries in a distribution table
263 void stat_iterate_distrib_tbl(const distrib_tbl_t *tbl, eval_distrib_entry_fun eval, void *env)
265 distrib_entry_t *entry;
267 foreach_pset(tbl->hash_map, entry)