[v9,15/18] efd: add checks for max SIMD bitwidth
diff mbox series

Message ID 20201016142742.87297-16-ciara.power@intel.com
State Superseded
Delegated to: David Marchand
Headers show
Series
  • add max SIMD bitwidth to EAL
Related show

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Ciara Power Oct. 16, 2020, 2:27 p.m. UTC
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>
Acked-by: Yipeng Wang <yipeng1.wang@intel.com>

---
v4: Updated enum name.
---
 lib/librte_efd/rte_efd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/lib/librte_efd/rte_efd.c b/lib/librte_efd/rte_efd.c
index 6a799556d4..e925b73a9c 100644
--- a/lib/librte_efd/rte_efd.c
+++ b/lib/librte_efd/rte_efd.c
@@ -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_SIMD_256)
 		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_SIMD_128)
 		table->lookup_fn = EFD_LOOKUP_NEON;
 	else
 #endif