From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Bruce Richardson <bruce.richardson@intel.com>,
Joyce Kong <joyce.kong@arm.com>,
Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>,
Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH 2/2] eal: add rte ffs32 and rte ffs64 inline functions
Date: Wed, 20 Mar 2024 14:24:39 -0700 [thread overview]
Message-ID: <1710969879-23701-3-git-send-email-roretzla@linux.microsoft.com> (raw)
In-Reply-To: <1710969879-23701-1-git-send-email-roretzla@linux.microsoft.com>
provide toolchain abstraction for __builtin_ffs{,l,ll} gcc built-in
intrinsics.
Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
lib/eal/include/rte_bitops.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/lib/eal/include/rte_bitops.h b/lib/eal/include/rte_bitops.h
index 449565e..e157a45 100644
--- a/lib/eal/include/rte_bitops.h
+++ b/lib/eal/include/rte_bitops.h
@@ -405,6 +405,28 @@
return (unsigned int)__popcnt64(v);
}
+static inline unsigned int
+rte_ffs32(uint32_t v)
+{
+ unsigned long rv;
+
+ if (0 == _BitScanForward(&rv, v))
+ return 0;
+
+ return (unsigned int)rv + 1;
+}
+
+static inline unsigned int
+rte_ffs64(uint64_t v)
+{
+ unsigned long rv;
+
+ if (0 == _BitScanForward64(&rv, v))
+ return 0;
+
+ return (unsigned int)rv + 1;
+}
+
#else
/**
@@ -491,6 +513,18 @@
return (unsigned int)__builtin_popcountll(v);
}
+static inline unsigned int
+rte_ffs32(uint32_t v)
+{
+ return (unsigned int)__builtin_ffs(v);
+}
+
+static inline unsigned int
+rte_ffs64(uint64_t v)
+{
+ return (unsigned int)__builtin_ffsll(v);
+}
+
#endif
/**
--
1.8.3.1
prev parent reply other threads:[~2024-03-20 21:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-20 21:24 [PATCH 0/2] provide rte_ffs32, rte_ffs64 and __rte_x86_movdiri for MSVC Tyler Retzlaff
2024-03-20 21:24 ` [PATCH 1/2] eal: provide movdiri " Tyler Retzlaff
2024-03-20 21:24 ` Tyler Retzlaff [this message]
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