[v2,16/17] efd: add checks for max SIMD bitwidth
Checks
Commit Message
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.
Cc: Byron Marohn <byron.marohn@intel.com>
Cc: Yipeng Wang <yipeng1.wang@intel.com>
Signed-off-by: Ciara Power <ciara.power@intel.com>
---
lib/librte_efd/rte_efd.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
@@ -645,7 +645,9 @@ 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_get_max_simd_bitwidth() >= RTE_MAX_256_SIMD)
table->lookup_fn = EFD_LOOKUP_AVX2;
else
#endif
@@ -655,7 +657,8 @@ 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_get_max_simd_bitwidth() >= RTE_MAX_128_SIMD)
table->lookup_fn = EFD_LOOKUP_NEON;
else
#endif