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efd: check max SIMD bitwidth

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When choosing a vector path to take, an extra condition must be
satisfied to ensure the max SIMD bitwidth allows for the CPU enabled
path.

Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Yipeng Wang <yipeng1.wang@intel.com>
This commit is contained in:
Ciara Power 2020-10-19 15:48:55 +02:00 committed by David Marchand
parent c9cd5806f7
commit ad2ffbf6d4
1 changed files with 6 additions and 2 deletions
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8
lib/librte_efd/rte_efd.c
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@ -21,6 +21,7 @@
#include <rte_jhash.h>
#include <rte_hash_crc.h>
#include <rte_tailq.h>
#include <rte_vect.h>
#include "rte_efd.h"
#if defined(RTE_ARCH_X86)
@ -645,7 +646,9 @@ rte_efd_create(const char *name, uint32_t max_num_rules, uint32_t key_len,
* For less than 4 bits, scalar function performs better
* than vectorised version
*/
if (RTE_EFD_VALUE_NUM_BITS > 3 && rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
if (RTE_EFD_VALUE_NUM_BITS > 3
&& rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2)
&& rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_256)
table->lookup_fn = EFD_LOOKUP_AVX2;
else
#endif
@ -655,7 +658,8 @@ rte_efd_create(const char *name, uint32_t max_num_rules, uint32_t key_len,
* than vectorised version
*/
if (RTE_EFD_VALUE_NUM_BITS > 16 &&
rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON))
rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON) &&
rte_vect_get_max_simd_bitwidth() >= RTE_VECT_SIMD_128)
table->lookup_fn = EFD_LOOKUP_NEON;
else
#endif