From: Bruce Richardson <bruce.richard...@intel.com>
A common need within the drivers is to select between SSE, AVX2 and
AVX-512 code paths. Provide a common function which helps with this
decision making, that returns the max simd bandwidth based on any
user configured maximums and available CPU flags.
Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
Signed-off-by: Ciara Loftus <ciara.lof...@intel.com>
---
drivers/net/intel/common/rx_vec_x86.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/net/intel/common/rx_vec_x86.h
b/drivers/net/intel/common/rx_vec_x86.h
index 3d7343b1ff..314fa24b41 100644
--- a/drivers/net/intel/common/rx_vec_x86.h
+++ b/drivers/net/intel/common/rx_vec_x86.h
@@ -346,4 +346,27 @@ ci_rxq_rearm(struct ci_rx_queue *rxq, const enum
ci_rx_vec_level vec_level)
rte_write32_wc(rte_cpu_to_le_32(rx_id), rxq->qrx_tail);
}
+#ifdef CC_AVX512_SUPPORT
+#define X86_MAX_SIMD_BITWIDTH (rte_vect_get_max_simd_bitwidth())
+#else
+#define X86_MAX_SIMD_BITWIDTH RTE_MIN(256, rte_vect_get_max_simd_bitwidth())
+#endif /* CC_AVX512_SUPPORT */
+
+static inline enum rte_vect_max_simd
+ci_get_x86_max_simd_bitwidth(void)
+{
+ int ret = RTE_VECT_SIMD_DISABLED;
+ int simd = X86_MAX_SIMD_BITWIDTH;
+
+ if (simd >= 512 && rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1 &&
+ rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512BW) == 1)
+ ret = RTE_VECT_SIMD_512;
+ else if (simd >= 256 && (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2) ==
1 ||
+ rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX512F) == 1))
+ ret = RTE_VECT_SIMD_256;
+ else if (simd >= 128)
+ ret = RTE_VECT_SIMD_128;
+ return ret;
+}
+
#endif /* _COMMON_INTEL_RX_VEC_X86_H_ */
--
2.34.1
