fixup! sys: util: timeutil: add timespec manipulation utilities

Author: cfriedt

include/zephyr/sys/timeutil.h

@@ -381,8 +381,24 @@ static inline bool timespec_normalize_overflow(struct timespec *ts)
 	__ASSERT_NO_MSG(ts != NULL);
 
 	int sign = (ts->tv_nsec >= 0) - (ts->tv_nsec < 0);
+#ifdef CONFIG_SPEED_OPTIMIZATIONS
+	/*
+	 * Branchless, for cores with icache, dcache, hw divide, etc. where cache hits are more
+	 * expensive than branches.
+	 */
 	int64_t sec = (ts->tv_nsec >= NSEC_PER_SEC) * (ts->tv_nsec / NSEC_PER_SEC) +
 		      (ts->tv_nsec < 0) * DIV_ROUND_UP(-ts->tv_nsec, NSEC_PER_SEC);
+#else
+	/* size-optimized */
+	long sec = 0;
+
+	if (ts->tv_nsec >= NSEC_PER_SEC) {
+		sec = ts->tv_nsec / NSEC_PER_SEC;
+	} else if (ts->tv_nsec < 0) {
+		sec = DIV_ROUND_UP(-ts->tv_nsec, NSEC_PER_SEC);
+	}
+#endif
+
 	bool overflow = __builtin_add_overflow(ts->tv_sec, sign * sec, &ts->tv_sec) ||
 			__builtin_sub_overflow(ts->tv_nsec, (long)(sign * sec * NSEC_PER_SEC),
 					       &ts->tv_nsec);