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lpm: add scalar version of lookupx4

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Add an implementation of the rte_lpm_lookupx4() function for platforms
without support for vector operations.

This will be useful in the upcoming RISC-V port as well as any platform
which may want to start with a basic level of LPM support.

Signed-off-by: Michal Mazurek <maz@semihalf.com>
Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
This commit is contained in:
Michal Mazurek 2022-06-01 13:15:42 +02:00 committed by Thomas Monjalon
parent 4036de2730
commit 406937f89f
4 changed files with 47 additions and 1 deletions
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6
doc/guides/rel_notes/release_22_07.rst
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@ -113,6 +113,12 @@ New Features
* ``RTE_EVENT_QUEUE_ATTR_WEIGHT``
* ``RTE_EVENT_QUEUE_ATTR_AFFINITY``
* **Added scalar version of the LPM library.**
Added scalar implementation of ``rte_lpm_lookupx4``.
This is a fall-back implementation for platforms that
don't support vector operations.
Removed Items
-------------

1
lib/lpm/meson.build
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@ -14,6 +14,7 @@ headers = files('rte_lpm.h', 'rte_lpm6.h')
indirect_headers += files(
'rte_lpm_altivec.h',
'rte_lpm_neon.h',
'rte_lpm_scalar.h',
'rte_lpm_sse.h',
'rte_lpm_sve.h',
)

4
lib/lpm/rte_lpm.h
View File

@ -405,8 +405,10 @@ rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
#endif
#elif defined(RTE_ARCH_PPC_64)
#include "rte_lpm_altivec.h"
#else
#elif defined(RTE_ARCH_X86)
#include "rte_lpm_sse.h"
#else
#include "rte_lpm_scalar.h"
#endif
#ifdef __cplusplus

37
lib/lpm/rte_lpm_scalar.h Normal file
View File

@ -0,0 +1,37 @@
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2022 StarFive
* Copyright(c) 2022 SiFive
* Copyright(c) 2022 Semihalf
*/
#ifndef _RTE_LPM_SCALAR_H_
#define _RTE_LPM_SCALAR_H_
#include <rte_vect.h>
#ifdef __cplusplus
extern "C" {
#endif
static inline void
rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
uint32_t defv)
{
uint32_t nh;
int ret;
ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[0], &nh);
hop[0] = (ret == 0) ? nh : defv;
ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[1], &nh);
hop[1] = (ret == 0) ? nh : defv;
ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[2], &nh);
hop[2] = (ret == 0) ? nh : defv;
ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[3], &nh);
hop[3] = (ret == 0) ? nh : defv;
}
#ifdef __cplusplus
}
#endif
#endif /* _RTE_LPM_SCALAR_H_ */