2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef included_vector_neon_h
17 #define included_vector_neon_h
22 #define u8x16_splat(i) vdupq_n_u8(i)
23 #define u16x8_splat(i) vdupq_n_u16(i)
24 #define i16x8_splat(i) vdupq_n_s16(i)
25 #define u32x4_splat(i) vdupq_n_u32(i)
26 #define i32x4_splat(i) vdupq_n_s32(i)
29 #define u16x8_add(a,b) vaddq_u16(a,b)
30 #define i16x8_add(a,b) vaddq_s16(a,b)
31 #define u16x8_sub_saturate(a,b) vsubq_u16(a,b)
32 #define i16x8_sub_saturate(a,b) vsubq_s16(a,b)
34 #define u16x8_is_equal(a,b) vceqq_u16(a,b)
35 #define i16x8_is_equal(a,b) vceqq_i16(a,b)
38 u16x8_zero_byte_mask (u16x8 input)
40 u8x16 vall_one = vdupq_n_u8 (0x0);
41 u8x16 res_values = { 0x01, 0x02, 0x04, 0x08,
42 0x10, 0x20, 0x40, 0x80,
43 0x01, 0x02, 0x04, 0x08,
44 0x10, 0x20, 0x40, 0x80
47 /* input --> [0x80, 0x40, 0x01, 0xf0, ... ] */
49 vreinterpretq_u8_u16 (vceqq_u16 (input, vreinterpretq_u16_u8 (vall_one)));
50 u8x16 before_merge = vminq_u8 (test_result, res_values);
51 /*before_merge--> [0x80, 0x00, 0x00, 0x10, ... ] */
52 /* u8x16 --> [a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p] */
53 /* pair add until we have 2 uint64_t */
54 u16x8 merge1 = vpaddlq_u8 (before_merge);
55 /* u16x8--> [a+b,c+d, e+f,g+h, i+j,k+l, m+n,o+p] */
56 u32x4 merge2 = vpaddlq_u16 (merge1);
57 /* u32x4--> [a+b+c+d, e+f+g+h, i+j+k+l, m+n+o+p] */
58 u64x2 merge3 = vpaddlq_u32 (merge2);
59 /* u64x2--> [a+b+c+d+e+f+g+h, i+j+k+l+m+n+o+p] */
60 return (u32) (vgetq_lane_u64 (merge3, 1) << 8) + vgetq_lane_u64 (merge3, 0);
63 #endif /* included_vector_neon_h */
66 * fd.io coding-style-patch-verification: ON
69 * eval: (c-set-style "gnu")