diff options
Diffstat (limited to 'lib/librte_efd/rte_efd_arm64.h')
| -rw-r--r-- | lib/librte_efd/rte_efd_arm64.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/librte_efd/rte_efd_arm64.h b/lib/librte_efd/rte_efd_arm64.h new file mode 100644 index 00000000..63289ac4 --- /dev/null +++ b/lib/librte_efd/rte_efd_arm64.h @@ -0,0 +1,76 @@ +/* + * BSD LICENSE + * + * Copyright (C) Cavium, Inc. 2017. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Cavium, Inc nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * rte_efd_arm64.h + * This file holds all arm64 specific EFD functions + */ + +#ifndef __RTE_EFD_ARM64_H__ +#define __RTE_EFD_ARM64_H__ + +#include <rte_vect.h> + +static inline efd_value_t +efd_lookup_internal_neon(const efd_hashfunc_t *group_hash_idx, + const efd_lookuptbl_t *group_lookup_table, + const uint32_t hash_val_a, const uint32_t hash_val_b) +{ + efd_value_t value = 0; + uint32_t i = 0; + uint32x4_t vhash_val_a = vmovq_n_u32(hash_val_a); + uint32x4_t vhash_val_b = vmovq_n_u32(hash_val_b); + int32x4_t vshift = {0, 1, 2, 3}; + uint32x4_t vmask = vdupq_n_u32(0x1); + int32x4_t vincr = vdupq_n_s32(4); + + for (; i < RTE_EFD_VALUE_NUM_BITS; i += 4) { + uint32x4_t vhash_idx = vshll_n_u16( + vld1_u16((uint16_t const *)&group_hash_idx[i]), 0); + uint32x4_t vlookup_table = vshll_n_u16( + vld1_u16((uint16_t const *)&group_lookup_table[i]), 0); + uint32x4_t vhash = vaddq_u32(vhash_val_a, + vmulq_u32(vhash_idx, vhash_val_b)); + int32x4_t vbucket_idx = vnegq_s32(vreinterpretq_s32_u32( + vshrq_n_u32(vhash, EFD_LOOKUPTBL_SHIFT))); + uint32x4_t vresult = vshlq_u32(vlookup_table, vbucket_idx); + + vresult = vandq_u32(vresult, vmask); + vresult = vshlq_u32(vresult, vshift); + value |= vaddvq_u32(vresult); + vshift = vaddq_s32(vshift, vincr); + } + + return value; +} + +#endif /* __RTE_EFD_ARM64_H__ */ |