From: Daniele Di Proietto <[email protected]>
is_all_zeros() is quite slow for u128 initialization because:
- It is not inlined
- It checks byte by byte
This commit introduces a new function to perform this function, which
improves performance in the DPDK packet processing path for upcoming
commits that regularly check u128 values.
---
lib/util.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lib/util.h b/lib/util.h
index 7080a0c..eebc6e9 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -568,6 +568,13 @@ ovs_u128_equals(const ovs_u128 *a, const ovs_u128 *b)
return (a->u64.hi == b->u64.hi) && (a->u64.lo == b->u64.lo);
}
+/* Returns true if 'val' is 0. */
+static inline bool
+ovs_u128_is_zero(const ovs_u128 *val)
+{
+ return !(val->u64.hi || val->u64.lo);
+}
+
void xsleep(unsigned int seconds);
#ifdef _WIN32
--
2.1.4
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