mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
38 lines
710 B
C
38 lines
710 B
C
/*
|
|
* tsftomsu - convert from a time stamp fraction to milliseconds
|
|
*/
|
|
#include "ntp_fp.h"
|
|
#include "ntp_stdlib.h"
|
|
|
|
int
|
|
tsftomsu(tsf, round)
|
|
u_long tsf;
|
|
int round;
|
|
{
|
|
register long val_ui, val_uf;
|
|
register long tmp_ui, tmp_uf;
|
|
register int i;
|
|
|
|
/*
|
|
* Essentially, multiply by 10 three times in l_fp form.
|
|
* The integral part is the milliseconds.
|
|
*/
|
|
val_ui = 0;
|
|
val_uf = tsf;
|
|
for (i = 3; i > 0; i--) {
|
|
M_LSHIFT(val_ui, val_uf);
|
|
tmp_ui = val_ui;
|
|
tmp_uf = val_uf;
|
|
M_LSHIFT(val_ui, val_uf);
|
|
M_LSHIFT(val_ui, val_uf);
|
|
M_ADD(val_ui, val_uf, tmp_ui, tmp_uf);
|
|
}
|
|
|
|
/*
|
|
* Round the value if need be, then return it.
|
|
*/
|
|
if (round && (val_uf & 0x80000000))
|
|
val_ui++;
|
|
return (int)val_ui;
|
|
}
|