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mm_size2ndx: using flsl to calculate the ndx

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Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>
This commit is contained in:
wangbowen6 2022-11-23 00:13:38 +08:00 committed by Xiang Xiao
parent b96ced8f4b
commit f7dec2c250
1 changed files with 3 additions and 9 deletions
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12
mm/mm_heap/mm_size2ndx.c
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@ -24,6 +24,8 @@
#include <nuttx/config.h> #include <nuttx/config.h>
#include <string.h>
#include <nuttx/mm/mm.h> #include <nuttx/mm/mm.h>
#include "mm_heap/mm.h" #include "mm_heap/mm.h"
@ -42,19 +44,11 @@
int mm_size2ndx(size_t size) int mm_size2ndx(size_t size)
{ {
int ndx = 0;
if (size >= MM_MAX_CHUNK) if (size >= MM_MAX_CHUNK)
{ {
return MM_NNODES - 1; return MM_NNODES - 1;
} }
size >>= MM_MIN_SHIFT; size >>= MM_MIN_SHIFT;
while (size > 1) return flsl(size) - 1;
{
ndx++;
size >>= 1;
}
return ndx;
} }