From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from we2-f167.wedos.net (w-smtp-out-7.wedos.net [46.28.106.5]) by dpdk.org (Postfix) with ESMTP id 5331D8E79 for ; Sat, 3 Oct 2015 10:58:55 +0200 (CEST) Received: from ([147.229.13.147]) by we2-f167.wedos.net (WEDOS Mail Server mail2) with ASMTP (SSL) id QWJ00151; Sat, 03 Oct 2015 10:58:51 +0200 From: Jan Viktorin To: dev@dpdk.org Date: Sat, 3 Oct 2015 10:58:17 +0200 Message-Id: <6adb4f88d40f15d87b686ec287f74cb2d57f1e20.1443737626.git.viktorin@rehivetech.com> X-Mailer: git-send-email 2.6.0 In-Reply-To: References: In-Reply-To: References: Cc: Vlastimil Kosar , Jan Viktorin Subject: [dpdk-dev] [PATCH v1 11/12] lpm/arm: implement rte_lpm_lookupx4 using rte_lpm_lookup_bulk on for-x86 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Oct 2015 08:58:55 -0000 From: Vlastimil Kosar LPM function rte_lpm_lookupx4() uses i686/x86_64 SIMD intrinsics. Therefore, the function is reimplemented using non-vector operations for non-x86 architectures. In the future, each architecture should have vectorized code. This patch includes rudimentary emulation of intrinsic functions _mm_set_epi32(), _mm_loadu_si128() and _mm_load_si128() for easy portability of existing applications. LPM builds now when on ARM. FIXME: to be reworked Signed-off-by: Vlastimil Kosar Signed-off-by: Jan Viktorin --- config/defconfig_arm-armv7-a-linuxapp-gcc | 1 - lib/librte_lpm/rte_lpm.h | 71 +++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+), 1 deletion(-) diff --git a/config/defconfig_arm-armv7-a-linuxapp-gcc b/config/defconfig_arm-armv7-a-linuxapp-gcc index a466d13..c434429 100644 --- a/config/defconfig_arm-armv7-a-linuxapp-gcc +++ b/config/defconfig_arm-armv7-a-linuxapp-gcc @@ -56,7 +56,6 @@ CONFIG_XMM_SIZE=16 # fails to compile on ARM CONFIG_RTE_LIBRTE_ACL=n -CONFIG_RTE_LIBRTE_LPM=n # cannot use those on ARM CONFIG_RTE_KNI_KMOD=n diff --git a/lib/librte_lpm/rte_lpm.h b/lib/librte_lpm/rte_lpm.h index 11f0c04..81d23a2 100644 --- a/lib/librte_lpm/rte_lpm.h +++ b/lib/librte_lpm/rte_lpm.h @@ -47,7 +47,9 @@ #include #include #include +#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686) #include +#endif #ifdef __cplusplus extern "C" { @@ -369,6 +371,7 @@ rte_lpm_lookup_bulk_func(const struct rte_lpm *lpm, const uint32_t * ips, return 0; } +#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686) /* Mask four results. */ #define RTE_LPM_MASKX4_RES UINT64_C(0x00ff00ff00ff00ff) @@ -483,6 +486,74 @@ rte_lpm_lookupx4(const struct rte_lpm *lpm, __m128i ip, uint16_t hop[4], hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[2] : defv; hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[3] : defv; } +#else +// TODO: this code should be reworked. + +typedef struct { + union uint128 { + uint8_t uint8[16]; + uint32_t uint32[4]; + } val; +} __m128i; + +static inline __m128i +_mm_set_epi32(uint32_t v0, uint32_t v1, uint32_t v2, uint32_t v3) +{ + __m128i res; + res.val.uint32[0] = v0; + res.val.uint32[1] = v1; + res.val.uint32[2] = v2; + res.val.uint32[3] = v3; + return res; +} + +static inline __m128i +_mm_loadu_si128(__m128i * v) +{ + __m128i res; + res = *v; + return res; +} + +static inline __m128i +_mm_load_si128(__m128i * v) +{ + __m128i res; + res = *v; + return res; +} + +/** + * Lookup four IP addresses in an LPM table. + * + * @param lpm + * LPM object handle + * @param ip + * Four IPs to be looked up in the LPM table + * @param hop + * Next hop of the most specific rule found for IP (valid on lookup hit only). + * This is an 4 elements array of two byte values. + * If the lookup was succesfull for the given IP, then least significant byte + * of the corresponding element is the actual next hop and the most + * significant byte is zero. + * If the lookup for the given IP failed, then corresponding element would + * contain default value, see description of then next parameter. + * @param defv + * Default value to populate into corresponding element of hop[] array, + * if lookup would fail. + */ +static inline void +rte_lpm_lookupx4(const struct rte_lpm *lpm, __m128i ip, uint16_t hop[4], + uint16_t defv) +{ + rte_lpm_lookup_bulk(lpm, ip.val.uint32, hop, 4); + + hop[0] = (hop[0] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)hop[0] : defv; + hop[1] = (hop[1] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)hop[1] : defv; + hop[2] = (hop[2] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)hop[2] : defv; + hop[3] = (hop[3] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)hop[3] : defv; +} +#endif #ifdef __cplusplus } -- 2.5.2