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[buddy] improve initialization of bddnode

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* src/kernel.c, src/kernel.h: Here.
This commit is contained in:
Alexandre Duret-Lutz 2016-11-08 12:00:24 +01:00
parent 278b41f4bb
commit 5a862295d3
2 changed files with 24 additions and 14 deletions
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29
buddy/src/kernel.c
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@ -195,16 +195,18 @@ int bdd_init(int initnodesize, int cs)
/* Load these globals into local variables to help the
optimizer. */
int sz = bddnodesize;
BddNode* b = bddnodes;
BddNodeInit* b = (BddNodeInit*)bddnodes;
for (n=0 ; n<sz ; n++)
{
b->refcou = 0;
b->level = 0;
b->low = -1;
b->next = n+1;
++b;
b[n].z = 0;
b[n].low = -1;
// Initializing HIGH is useless in BuDDy, but it helps the
// compiler vectorizing the code, and it helps the processor
// write-combining data to memory.
b[n].high = 0;
b[n].next = n+1;
}
bddnodes[sz-1].next = 0;
b[sz-1].next = 0;
bddnodes[0].refcou = bddnodes[1].refcou = MAXREF;
LOW(0) = HIGH(0) = 0;
@ -1447,16 +1449,15 @@ int bdd_noderesize(int doRehash)
/* copy these global variables into local variables to help the
optimizer */
int sz = bddnodesize;
BddNode* b = bddnodes + oldsize;
BddNodeInit* b = (BddNodeInit*)(bddnodes + oldsize);
for (n=oldsize ; n<sz ; n++)
{
b->refcou = 0;
b->level = 0;
b->low = -1;
b->next = n+1;
++b;
b[n].z = 0;
b[n].low = -1;
b[n].high = 0;
b[n].next = n+1;
}
bddnodes[sz-1].next = bddfreepos;
b[sz-1].next = bddfreepos;
bddfreepos = oldsize;
bddfreenum += bddnodesize - oldsize;