From: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
To: jerin.jacob@caviumnetworks.com,
santosh.shukla@caviumnetworks.com, erik.g.carrillo@intel.com
Cc: dev@dpdk.org, Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Subject: [dpdk-dev] [PATCH 01/10] eal: add API to align variable to previous power of 2
Date: Sat, 17 Feb 2018 03:06:51 +0530 [thread overview]
Message-ID: <20180216213700.3415-2-pbhagavatula@caviumnetworks.com> (raw)
In-Reply-To: <20180216213700.3415-1-pbhagavatula@caviumnetworks.com>
Add 32b and 64b API's to align the given variable to the previous power
of 2.
Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
---
lib/librte_eal/common/include/rte_common.h | 36 ++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index c7803e41c..126914f07 100644
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -259,6 +259,24 @@ rte_align32pow2(uint32_t x)
return x + 1;
}
+/**
+ * Aligns input parameter to the previous power of 2
+ *
+ * @param x
+ * The integer value to algin
+ *
+ * @return
+ * Input parameter aligned to the previous power of 2
+ */
+static inline uint32_t
+rte_align32lowpow2(uint32_t x)
+{
+ x = rte_align32pow2(x);
+ x--;
+
+ return x - (x >> 1);
+}
+
/**
* Aligns 64b input parameter to the next power of 2
*
@@ -282,6 +300,24 @@ rte_align64pow2(uint64_t v)
return v + 1;
}
+/**
+ * Aligns 64b input parameter to the previous power of 2
+ *
+ * @param v
+ * The 64b value to align
+ *
+ * @return
+ * Input parameter aligned to the previous power of 2
+ */
+static inline uint64_t
+rte_align64lowpow2(uint64_t v)
+{
+ v = rte_align64pow2(v);
+ v--;
+
+ return v - (v >> 1);
+}
+
/*********** Macros for calculating min and max **********/
/**
--
2.16.1
next prev parent reply other threads:[~2018-02-16 21:37 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-16 21:36 [dpdk-dev] [PATCH 0/9] event/octeontx: add event timer adapter driver Pavan Nikhilesh
2018-02-16 21:36 ` Pavan Nikhilesh [this message]
2018-02-17 4:49 ` [dpdk-dev] [PATCH 01/10] eal: add API to align variable to previous power of 2 Jerin Jacob
2018-02-16 21:36 ` [dpdk-dev] [PATCH 02/10] mempool/octeontx: probe timvf PCIe devices Pavan Nikhilesh
2018-02-17 4:54 ` Jerin Jacob
2018-02-19 9:19 ` Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 03/10] event/octeontx: add support to create and free timer adapter Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 04/10] event/octeontx: add support to start and stop timer device Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 05/10] event/octeontx: add support for arm and cancel Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 06/10] event/octeontx: add single producer timer arm variant Pavan Nikhilesh
2018-03-07 19:41 ` Carrillo, Erik G
2018-02-16 21:36 ` [dpdk-dev] [PATCH 07/10] event/octeontx: optimize timer adapter resolution parameters Pavan Nikhilesh
2018-02-17 5:06 ` Jerin Jacob
2018-02-19 9:34 ` Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 08/10] event/octeontx: add option to use fpavf as chunk pool Pavan Nikhilesh
2018-02-18 11:42 ` santosh
2018-02-19 9:15 ` Pavan Nikhilesh
2018-02-23 20:17 ` Carrillo, Erik G
2018-02-26 19:25 ` Pavan Nikhilesh
2018-02-16 21:36 ` [dpdk-dev] [PATCH 09/10] event/octeontx: add timer adapter SW traversal routine Pavan Nikhilesh
2018-02-17 5:01 ` Jerin Jacob
2018-02-16 21:37 ` [dpdk-dev] [PATCH 10/10] maintainers: claim responsibility for octeontx timvf Pavan Nikhilesh
2018-02-17 5:03 ` Jerin Jacob
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 00/11] event/octeontx: add event timer adapter driver Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 01/11] mempool/octeontx: probe timvf PCIe devices Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 02/11] usertools: add Cavium TIM as an event device Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 03/11] event/octeontx: add support to create and free timer adapter Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 04/11] event/octeontx: add support to start and stop timer device Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 05/11] event/octeontx: add multiproducer timer arm and cancel Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 06/11] event/octeontx: add single producer timer arm variant Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 07/11] event/octeontx: add burst mode for timer arm Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 08/11] event/octeontx: optimize timer adapter resolution parameters Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 09/11] event/octeontx: add option to use fpavf as chunk pool Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 10/11] doc: update eventdev OcteonTx documentation Pavan Nikhilesh
2018-03-14 13:52 ` [dpdk-dev] [PATCH v2 11/11] maintainers: claim responsibility for octeontx timvf Pavan Nikhilesh
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 00/12] event/octeontx: add event timer adapter driver Pavan Nikhilesh
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 01/12] mempool/octeontx: probe timvf PCIe devices Pavan Nikhilesh
2018-04-08 2:19 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 02/12] usertools: add Cavium TIM as an event device Pavan Nikhilesh
2018-04-08 3:23 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 03/12] event/octeontx: add support to create and free timer adapter Pavan Nikhilesh
2018-04-08 7:39 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 04/12] event/octeontx: add support to start and stop timer device Pavan Nikhilesh
2018-04-08 7:47 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 05/12] event/octeontx: add event timer stats get and reset Pavan Nikhilesh
2018-04-04 1:59 ` Carrillo, Erik G
2018-04-08 7:52 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 06/12] event/octeontx: add multiproducer timer arm and cancel Pavan Nikhilesh
2018-04-08 7:59 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 07/12] event/octeontx: add single producer timer arm variant Pavan Nikhilesh
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 08/12] event/octeontx: add burst mode for timer arm Pavan Nikhilesh
2018-04-04 2:15 ` Carrillo, Erik G
2018-04-08 8:06 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 09/12] event/octeontx: optimize timer adapter resolution parameters Pavan Nikhilesh
2018-04-08 8:09 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 10/12] event/octeontx: add option to use fpavf as chunk pool Pavan Nikhilesh
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 11/12] doc: update eventdev OcteonTx documentation Pavan Nikhilesh
2018-04-04 2:19 ` Carrillo, Erik G
2018-04-08 8:13 ` Jerin Jacob
2018-04-03 15:05 ` [dpdk-dev] [PATCH v3 12/12] maintainers: claim responsibility for octeontx timvf Pavan Nikhilesh
2018-04-08 8:15 ` Jerin Jacob
2018-04-08 2:55 ` [dpdk-dev] [PATCH v3 00/12] event/octeontx: add event timer adapter driver Jerin Jacob
2018-04-08 8:58 ` Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 00/11] " Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 01/11] usertools: add Cavium TIM as an event device Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 02/11] event/octeontx: add support to probe timvf PCIe devices Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 03/11] event/octeontx: add support to create and free timer adapter Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 04/11] event/octeontx: add support to start and stop timer device Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 05/11] event/octeontx: add event timer stats get and reset Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 06/11] event/octeontx: add multiproducer timer arm and cancel Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 07/11] event/octeontx: add single producer timer arm variant Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 08/11] event/octeontx: add burst mode for timer arm Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 09/11] event/octeontx: optimize timer adapter resolution parameters Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 10/11] event/octeontx: add option to use fpavf as chunk pool Pavan Nikhilesh
2018-04-09 21:00 ` [dpdk-dev] [PATCH v4 11/11] doc: update eventdev OcteonTx documentation Pavan Nikhilesh
2018-04-12 12:30 ` [dpdk-dev] [PATCH v4 00/11] event/octeontx: add event timer adapter driver Jerin Jacob
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