/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef included_vector_neon_h #define included_vector_neon_h #include <arm_neon.h> /* Splats. */ #define u8x16_splat(i) vdupq_n_u8(i) #define u16x8_splat(i) vdupq_n_u16(i) #define i16x8_splat(i) vdupq_n_s16(i) #define u32x4_splat(i) vdupq_n_u32(i) #define i32x4_splat(i) vdupq_n_s32(i) /* Arithmetic */ #define u16x8_add(a,b) vaddq_u16(a,b) #define i16x8_add(a,b) vaddq_s16(a,b) #define u16x8_sub_saturate(a,b) vsubq_u16(a,b) #define i16x8_sub_saturate(a,b) vsubq_s16(a,b) #define u16x8_is_equal(a,b) vceqq_u16(a,b) #define i16x8_is_equal(a,b) vceqq_i16(a,b) always_inline u32 u16x8_zero_byte_mask (u16x8 input) { u8x16 vall_one = vdupq_n_u8 (0x0); u8x16 res_values = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; /* input --> [0x80, 0x40, 0x01, 0xf0, ... ] */ u8x16 test_result = vreinterpretq_u8_u16 (vceqq_u16 (input, vreinterpretq_u16_u8 (vall_one))); u8x16 before_merge = vminq_u8 (test_result, res_values); /*before_merge--> [0x80, 0x00, 0x00, 0x10, ... ] */ /* u8x16 --> [a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p] */ /* pair add until we have 2 uint64_t */ u16x8 merge1 = vpaddlq_u8 (before_merge); /* u16x8--> [a+b,c+d, e+f,g+h, i+j,k+l, m+n,o+p] */ u32x4 merge2 = vpaddlq_u16 (merge1); /* u32x4--> [a+b+c+d, e+f+g+h, i+j+k+l, m+n+o+p] */ u64x2 merge3 = vpaddlq_u32 (merge2); /* u64x2--> [a+b+c+d+e+f+g+h, i+j+k+l+m+n+o+p] */ return (u32) (vgetq_lane_u64 (merge3, 1) << 8) + vgetq_lane_u64 (merge3, 0); } #endif /* included_vector_neon_h */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */