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 40D2A46F51; Fri, 19 Sep 2025 18:36:18 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 92FBF40673; Fri, 19 Sep 2025 18:36:08 +0200 (CEST) Received: from out162-62-57-49.mail.qq.com (out162-62-57-49.mail.qq.com [162.62.57.49]) by mails.dpdk.org (Postfix) with UTF8SMTP id 1D8CB40612 for ; Fri, 19 Sep 2025 18:36:05 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1758299759; bh=Wtp8QCAyqkMOUwRgQPcmIk433wt+G6yTxnrsHk7bTZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=e0IlJ1xGo4cBB3offU7CmmeYFPpqk38TWB7VzmQ6O0+DTRx/2Sur5rpUsMaQrdEIN v2wvhvU1SuJwP8LC+oD/5/AlQS++qshRYRkXucxE16Qb8Qa0T0T6KI3qUTBT3kNp8k j870hdUAbxcjC0F0lictkOyLp31YDw8KeEs5YcEU= Received: from ar ([42.177.177.196]) by newxmesmtplogicsvrsza36-0.qq.com (NewEsmtp) with SMTP id 8F998C88; Sat, 20 Sep 2025 00:35:57 +0800 X-QQ-mid: xmsmtpt1758299757t9u1wud7k Message-ID: X-QQ-XMAILINFO: NbgegmlEc3JuF7dsOx4wrq8sStRCSWQXM314kFQeBhsJYqCfN8xLnmYljNRU4N YlmOXMa0E58FRz+HyGwu3wg/5ADUXOhpuDoyNwBcdc75VdXutx32qQsUpfe7ihQWI98ykQqwJTzD 0RNqQnIETJ3ORcsLpL5xdrxP+6nFLV1f4fxoH7yDOG4472eu2Ohy1GN+u7iWX2cEZ99K9fhog4DI y1J+dNLjJlPjTVYNC+WTEOVSyQePqW3wku1MDuPu52B5kyovXncwiaKHBp6a4u7IsvbXrOBVb5g6 0ShAsnHgwOcKwhXv/g44/63I5Zyf+8RWF25eHkLlBDqRVS6RGltpmU2v7jFE6gG7Cw5G+u03mz0y 4oeauOQMDFwLlmFF0Lowlqnc4OaMVANjbSlByk7UsS4h11E9w0MPduGK4IcxRBIY8a5qxQ+R5oca s/uM36k0NQeKFcqB9VQTRWcdtub7Huxjn4hu/MEtL46jck0+MuvEgY1h7hFI5u9BpEWoTmpdu8Lk Wt2TQsTZ4mh3yJB91fNSDA3Sjcsxdkxr0QWlCcEKFk1z0bbIkoBiAG5jTRWkpDCRROGrS5xxNoZR wxUSNfqup17RVZEQDtK+PDqdeZYWeLont8X/dxPpIkaax6E9vfIBRcQZPFIdnO1ZiawOLlXHrV2R SUa/+PbrUZWkMHt7VMQmNWIiuX2k7OVYHwmvwTMC2qkVKQUertcnEoqiMlqdDIJO+Iak1h6vh5lC tfVd3aU8BedGOFqGBzoFhkbIDjrVnfQtAmVOX329B83Hh9ZRbICZkR3t5eH1wULegXS/5enz5ahn RC0xP2tJhDwoBRxdOcP0oCqgkiTfkP0uWPgQXWgCKy5hKQasA+7Cj2RCAHBw0wGxp2ucrMVJvxJV eMj1JTObWjax90a7Szm9iYf6CVuBs1Y71PYF39qlSkWPmExl3DlmGPDW627LVJun5z/tYYzLFmXd lcjUqcWyVspV6tPZTmIIcaHSWtJNyfiAI6446gni+2LYlFejiJYg== X-QQ-XMRINFO: NI4Ajvh11aEj8Xl/2s1/T8w= From: uk7b@foxmail.com To: dev@dpdk.org Cc: Sun Yuechi , Thomas Monjalon , Bruce Richardson , Vladimir Medvedkin , Stanislaw Kardach Subject: [PATCH v3 2/4] lib/lpm: R-V V rte_lpm_lookupx4 Date: Sat, 20 Sep 2025 00:33:55 +0800 X-OQ-MSGID: <20250919163358.2887335-3-uk7b@foxmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250919163358.2887335-1-uk7b@foxmail.com> References: <20250919163358.2887335-1-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_ */ -- 2.51.0