/* $NetBSD: tsftomsu.c,v 1.1.1.1 2000/03/29 12:38:50 simonb Exp $ */ /* * tsftomsu - convert from a time stamp fraction to milliseconds */ #include "ntp_fp.h" #include "ntp_stdlib.h" int tsftomsu( 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; }