2  * timevalops.h -- calculations on 'struct timeval' values
28  * Convert usec to a time stamp fraction.
47  * Convert a time stamp fraction to microseconds.  The time stamp
48  * fraction is assumed to be unsigned.
78 		(ts)->l_ui = (u_long)(tv)->tv_sec; \
79 		TVUTOTSF((tv)->tv_usec, (ts)->l_uf); \
86 		(ts)->l_ui = (tv)->tv_sec; \
87 		usec = (tv)->tv_usec; \
88 		if (((tv)->tv_sec < 0) || ((tv)->tv_usec < 0)) { \
89 			usec = -usec; \
90 			(ts)->l_ui = -(ts)->l_ui; \
93 		TVUTOTSF(usec, (ts)->l_uf); \
105 		(tv)->tv_sec = (ts)->l_ui; \
106 		TSFTOTVU((ts)->l_uf, (tv)->tv_usec); \
107 		if ((tv)->tv_usec == 1000000) { \
108 			(tv)->tv_sec++; \
109 			(tv)->tv_usec = 0; \
119 	((x)->tv_usec >= 0 && (x)->tv_usec < MICROSECONDS)
122  * Convert milliseconds to a time stamp fraction.  Unused except for
129  * predicate: returns TRUE if the microseconds are out-of-bounds
140 	long		z;  in normalize_tval()  local
143 	 * If the fraction becomes excessive denormal, we use division  in normalize_tval()
148 	 * here: it has implementation-defined behaviour when applied  in normalize_tval()
151 	if (x.tv_usec < -3l * MICROSECONDS ||  in normalize_tval()
153 		z = x.tv_usec / MICROSECONDS;  in normalize_tval()
154 		x.tv_usec -= z * MICROSECONDS;  in normalize_tval()
155 		x.tv_sec += z;  in normalize_tval()
161 	 * mul-by-inverse trick is employed. (It also does the floor  in normalize_tval()
167 			x.tv_sec--;  in normalize_tval()
171 			x.tv_usec -= MICROSECONDS;  in normalize_tval()
194 /* x = a + b, b is fraction only */
209 /* x = a - b */
219 	x.tv_sec -= b.tv_sec;  in sub_tval()
220 	x.tv_usec -= b.tv_usec;  in sub_tval()
225 /* x = a - b, b is fraction only */
235 	x.tv_usec -= b;  in sub_tval_us()
240 /* x = -a */
248 	x.tv_sec = -a.tv_sec;  in neg_tval()
249 	x.tv_usec = -a.tv_usec;  in neg_tval()
265 			c.tv_sec = -c.tv_sec - 1;  in abs_tval()
266 			c.tv_usec = MICROSECONDS - c.tv_usec;  in abs_tval()
268 			c.tv_sec = -c.tv_sec;  in abs_tval()
276  * compare previously-normalised a and b
277  * return 1 / 0 / -1 if a < / == / > b
287 	r = (a.tv_sec > b.tv_sec) - (a.tv_sec < b.tv_sec);  in cmp_tval()
289 		r = (a.tv_usec > b.tv_usec) -  in cmp_tval()
296  * compare possibly-denormal a and b
297  * return 1 / 0 / -1 if a < / == / > b
309  * test previously-normalised a
310  * return 1 / 0 / -1 if a < / == / > 0
319 	r = (a.tv_sec > 0) - (a.tv_sec < 0);  in test_tval()
327  * test possibly-denormal a
328  * return 1 / 0 / -1 if a < / == / > 0
395 		out.tv_sec = -out.tv_sec;  in lfp_intv_to_tval()
396 		out.tv_usec = -out.tv_usec;  in lfp_intv_to_tval()