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Wed, 11 Jun 2025 23:00:18 +0800 X-QQ-mid: xmsmtpt1749654018tqr0kfvyf Message-ID: X-QQ-XMAILINFO: NQR8mRxMnur9zTD/5IOSKW4dzw1u+WsiLtWarU3+UF/CmqY8QrrFc88Lifc+N+ abRVGvX0XMLe8ifqBbhpmNxMOqFk9N1wx3C0vNRJZcTepuCXS2B5RRNIbh2nJEo3xg0OnAnFrPUb CkXVpN2lC2GUhBVRCLCrnP2IF9wOyvN6T+sY3R6vIO6uNfm9zIbH+hOLou/z/gZMWyfb0mngw/tY Ett9fjbtNFrxMSWD+YuYOdrueXxO2p9/ExTGwiTZoEFJrdKL7Q4J8EfqsEsAbfbusVrz7v0xAW0w 3oTSVUioUqjPgw2zP5uT3Di7PZZozhj5KFY1jFS/qmGC+1Gtzqnn4BysXuV5GzmgMKAKDWRLc2bC lPEzdVhzTY6A9Faz5QBUACX9DYIi9BMi28GNwZErvyvhznd2jHkuUtjnhWNqUuhzHfeaYxf2BN13 ha7cxzT04tfHn6ngU44x19atLUK1ymUQffKPd5CBWbgWFjrYiTqHisFhc/H++oJOArkNu9/V6GeE Gdyybr+PjF/fhRc2ZVUQFDzW3szTjcFBURO4l9BQsFRXdyRPSqD4Wlp4J/Cr3Q0rJUqhRvypagOS 8anwj+E912l+3VmlAcQrRnGJs6GZemyyqOCBACXvH2646WH0+JR6HR51xyeskeo6RO6ABnLG48jQ VtYEz0ljWtmwYUH//7ddlNHYa9LWhxzYt54h1oLnb0A6CJUxAsLOVFcmi/b7+4ZaM+IquYouUVri JFaD/zXcSJrIqWEK330PYVzx1/nep6euYTBSFaUiTbzLisTBO/n7oFqVnCpFWeNYvxvxeIDSoxT7 U5EpPw/2CnfhcPGtIBEIu++L9PHQELD3HDUE2foozeMq2DZY6RUUcqtwpR28BW3fGrlGJjbLCHS9 n86qiv6TnN2wxp6U65W12nRakCgOXvuZOP7xDd04CZxb03T0shDc1uXj4UE+KLJQ== 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 v5 2/3] lib/lpm: R-V V rte_lpm_lookupx4 Date: Wed, 11 Jun 2025 22:59:13 +0800 X-OQ-MSGID: <20250611145915.854026-3-uk7b@foxmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250611145915.854026-1-uk7b@foxmail.com> References: <20250611145915.854026-1-uk7b@foxmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 | 62 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 67 insertions(+) create mode 100644 lib/lpm/rte_lpm_rvv.h diff --git a/MAINTAINERS b/MAINTAINERS index 3e16789250..0f207ac129 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -340,6 +340,8 @@ 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 fae4f79fb9..09133061e5 100644 --- a/lib/lpm/meson.build +++ b/lib/lpm/meson.build @@ -17,6 +17,7 @@ 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 7df64f06b1..b06517206f 100644 --- a/lib/lpm/rte_lpm.h +++ b/lib/lpm/rte_lpm.h @@ -408,6 +408,8 @@ 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..5f48fb2b32 --- /dev/null +++ b/lib/lpm/rte_lpm_rvv.h @@ -0,0 +1,62 @@ +/* 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 + +#include +#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_ */ -- 2.49.0