From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id B05BA46AD4; Tue, 1 Jul 2025 20:21:10 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 67AC340678; Tue, 1 Jul 2025 20:20:56 +0200 (CEST) Received: from out203-205-221-192.mail.qq.com (out203-205-221-192.mail.qq.com [203.205.221.192]) by mails.dpdk.org (Postfix) with UTF8SMTP id 3F965402E3 for ; Tue, 1 Jul 2025 20:20:53 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1751394051; bh=PutZ37rHbszLrnLkIRnHrRkMzNC1xWzcFwrsDBdnpZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CKcIjTGV3OgSlixczYVqyIZYfgXhk2fsNcgVOYPn2Iq5IOpUliWoVp1uVYSjfeaZz QGIi+zCkGPVOgdeJ/aQz8gcmRMDw6EXem6e9BolRN0v/knhmCEh6Q1cpaZk8NDIqSg mKbWK0lRC2FVOqApFMg1n912nIYokWYpPClG8H/A= Received: from ar ([113.231.127.221]) by newxmesmtplogicsvrsza28-0.qq.com (NewEsmtp) with SMTP id 52C03A07; Wed, 02 Jul 2025 02:20:44 +0800 X-QQ-mid: xmsmtpt1751394044t4up2ou13 Message-ID: X-QQ-XMAILINFO: OATpkVjS499uSbs0zRyVidrHRwUyNztKG6y5KSlW/CKuEmKMaE/pcIkOyGgFIU OVg5NQpNjHHy2ZbVgpvG9brXgb9dZwG62mUnYoaYmOoBbyK7faYmIUMgA9jtT9WO5x3Xt+Vaya5F vN0dySc/DWk2a9lUM32uYfT6OXWDp6NoT6TGKk5As8APhcSrZ49LCZVqvFHT0+n13xTwV6aJ0KIR qJaIwbZ2CBNZQBQbW67Vfr93ZVH6qkoUWDk4UJSxpuikdOSp3lLd9L1vuvtCyS9igMMUggYfx8dd wbPS3DEZIt6aoAPNPOk9BoQsP9PGILKLEy6JZ0tFE+uLdS5rGj0erGydwJiQj2Aki+8/JmTEeXZv JGrwITMRqMxJLc5GDsMhHfhvjNEJFjQcGBBYWeBUMEmZP26DmqitnQ4bkmIsyRN/GgMGnDjE50Rh Lo0Tay7Jf/AIMad1dPZOwmVYLl1TIfdyljlJmCcCFBxhRPVqc7shEqCaFO+rMjpbkzGZOoUU8fcy eVmSPrdwEnTtUx59OB2hPj1Rtq2YdnXduHUP8yMSH6vfBHcbI0/NZBvdEXb13fiokKMfykg0pao+ /y8H3ne15MTjg9udOMZV5zZ29xqjtgACwe9ZBd4HPzoaHL4ES1Xqti6icnvJAwLPuNzOIu1xdJ2g h1YLaN6eoiLiyDXCFs46Igmu/vqiP77SgCG/ZJmPkPSSWJxy+AhenZiFthRquoUUxX5FA4r9lLzJ lMwsUI7pReDNZewn73rBz2bJTJ7ZenHFNQ0a+cWdQh9Vfd0ocKFrWWojzLB0YuqbfAT3jD9gfGCE k75D2b3pcSyv8QxRbXFtmhvqVHnlqsJtKrmee0tC0X/SNndWf8GSuhYCaOR/JoRRHTZRs9vuBgVS K4jIzmUPQI3/oQktx/OdReJT0MTbyBddge1fgCD7ssSCKvZfwQyzj9fV1RkXYLJ+uDguHIJTfclO YM4mN7aIXeSLf91l1vEKNRohigCamUFLs0MtPU6pY= X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= From: uk7b@foxmail.com To: dev@dpdk.org Cc: Sun Yuechi , Thomas Monjalon , Bruce Richardson , Vladimir Medvedkin , Stanislaw Kardach Subject: [PATCH v2 3/5] lib/lpm: R-V V rte_lpm_lookupx4 Date: Wed, 2 Jul 2025 02:20:31 +0800 X-OQ-MSGID: <20250701182033.642384-4-uk7b@foxmail.com> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250701182033.642384-1-uk7b@foxmail.com> References: <20250701182033.642384-1-uk7b@foxmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org From: Sun Yuechi Implement LPM lookupx4 function for RISC-V architecture using RISC-V Vector Extension instruction set Signed-off-by: Sun Yuechi --- MAINTAINERS | 2 ++ lib/lpm/meson.build | 1 + lib/lpm/rte_lpm.h | 2 ++ lib/lpm/rte_lpm_rvv.h | 59 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 64 insertions(+) create mode 100644 lib/lpm/rte_lpm_rvv.h diff --git a/MAINTAINERS b/MAINTAINERS index 0e9357f3a3..9bd97879b6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -341,6 +341,8 @@ M: Stanislaw Kardach F: config/riscv/ F: doc/guides/linux_gsg/cross_build_dpdk_for_riscv.rst F: lib/eal/riscv/ +M: sunyuechi +F: lib/**/*rvv* Intel x86 M: Bruce Richardson diff --git a/lib/lpm/meson.build b/lib/lpm/meson.build index cff8fed473..c4522eaf0c 100644 --- a/lib/lpm/meson.build +++ b/lib/lpm/meson.build @@ -11,6 +11,7 @@ indirect_headers += files( 'rte_lpm_scalar.h', 'rte_lpm_sse.h', 'rte_lpm_sve.h', + 'rte_lpm_rvv.h', ) deps += ['hash'] deps += ['rcu'] diff --git a/lib/lpm/rte_lpm.h b/lib/lpm/rte_lpm.h index 6bf8d9d883..edfe77b458 100644 --- a/lib/lpm/rte_lpm.h +++ b/lib/lpm/rte_lpm.h @@ -420,6 +420,8 @@ rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4], #include "rte_lpm_altivec.h" #elif defined(RTE_ARCH_X86) #include "rte_lpm_sse.h" +#elif defined(RTE_ARCH_RISCV) && defined(RTE_RISCV_FEATURE_V) +#include "rte_lpm_rvv.h" #else #include "rte_lpm_scalar.h" #endif diff --git a/lib/lpm/rte_lpm_rvv.h b/lib/lpm/rte_lpm_rvv.h new file mode 100644 index 0000000000..0d3dc91055 --- /dev/null +++ b/lib/lpm/rte_lpm_rvv.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright (c) 2025 Institute of Software Chinese Academy of Sciences (ISCAS). + */ + +#ifndef _RTE_LPM_RVV_H_ +#define _RTE_LPM_RVV_H_ + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#define RTE_LPM_LOOKUP_SUCCESS 0x01000000 +#define RTE_LPM_VALID_EXT_ENTRY_BITMASK 0x03000000 + +static inline void rte_lpm_lookupx4( + const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4], uint32_t defv) +{ + size_t vl = 4; + + const uint32_t *tbl24_p = (const uint32_t *)lpm->tbl24; + uint32_t tbl_entries[4] = { + tbl24_p[((uint32_t)ip[0]) >> 8], + tbl24_p[((uint32_t)ip[1]) >> 8], + tbl24_p[((uint32_t)ip[2]) >> 8], + tbl24_p[((uint32_t)ip[3]) >> 8], + }; + vuint32m1_t vtbl_entry = __riscv_vle32_v_u32m1(tbl_entries, vl); + + vbool32_t mask = __riscv_vmseq_vx_u32m1_b32( + __riscv_vand_vx_u32m1(vtbl_entry, RTE_LPM_VALID_EXT_ENTRY_BITMASK, vl), + RTE_LPM_VALID_EXT_ENTRY_BITMASK, vl); + + vuint32m1_t vtbl8_index = __riscv_vsll_vx_u32m1( + __riscv_vadd_vv_u32m1( + __riscv_vsll_vx_u32m1(__riscv_vand_vx_u32m1(vtbl_entry, 0x00FFFFFF, vl), 8, vl), + __riscv_vand_vx_u32m1( + __riscv_vle32_v_u32m1((const uint32_t *)&ip, vl), 0x000000FF, vl), + vl), + 2, vl); + + vtbl_entry = __riscv_vluxei32_v_u32m1_mu( + mask, vtbl_entry, (const uint32_t *)(lpm->tbl8), vtbl8_index, vl); + + vuint32m1_t vnext_hop = __riscv_vand_vx_u32m1(vtbl_entry, 0x00FFFFFF, vl); + mask = __riscv_vmseq_vx_u32m1_b32( + __riscv_vand_vx_u32m1(vtbl_entry, RTE_LPM_LOOKUP_SUCCESS, vl), 0, vl); + + vnext_hop = __riscv_vmerge_vxm_u32m1(vnext_hop, defv, mask, vl); + + __riscv_vse32_v_u32m1(hop, vnext_hop, vl); +} + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_LPM_RVV_H_ */ -- 2.50.0