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
21 #define u16x8_sub_saturate(a,b) vsubq_u16(a,b)
22 #define i16x8_sub_saturate(a,b) vsubq_s16(a,b)
25 u8x16_is_all_zero (u8x16 x)
27 return !(vaddvq_u8 (x));
31 u16x8_is_all_zero (u16x8 x)
33 return !(vaddvq_u16 (x));
37 u32x4_is_all_zero (u32x4 x)
39 return !(vaddvq_u32 (x));
43 u64x2_is_all_zero (u64x2 x)
45 return !(vaddvq_u64 (x));
48 /* Converts all ones/zeros compare mask to bitmap. */
50 u8x16_compare_byte_mask (u8x16 x)
52 uint8x16_t mask_shift =
53 { -7, -6, -5, -4, -3, -2, -1, 0, -7, -6, -5, -4, -3, -2, -1, 0 };
54 uint8x16_t mask_and = vdupq_n_u8 (0x80);
55 x = vandq_u8 (x, mask_and);
56 x = vshlq_u8 (x, vreinterpretq_s8_u8 (mask_shift));
60 return vgetq_lane_u8 (x, 0) | (vgetq_lane_u8 (x, 1) << 8);
64 u16x8_zero_byte_mask (u16x8 input)
66 u8x16 vall_one = vdupq_n_u8 (0x0);
67 u8x16 res_values = { 0x01, 0x02, 0x04, 0x08,
68 0x10, 0x20, 0x40, 0x80,
69 0x01, 0x02, 0x04, 0x08,
70 0x10, 0x20, 0x40, 0x80
73 /* input --> [0x80, 0x40, 0x01, 0xf0, ... ] */
75 vreinterpretq_u8_u16 (vceqq_u16 (input, vreinterpretq_u16_u8 (vall_one)));
76 u8x16 before_merge = vminq_u8 (test_result, res_values);
77 /*before_merge--> [0x80, 0x00, 0x00, 0x10, ... ] */
78 /* u8x16 --> [a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p] */
79 /* pair add until we have 2 uint64_t */
80 u16x8 merge1 = vpaddlq_u8 (before_merge);
81 /* u16x8--> [a+b,c+d, e+f,g+h, i+j,k+l, m+n,o+p] */
82 u32x4 merge2 = vpaddlq_u16 (merge1);
83 /* u32x4--> [a+b+c+d, e+f+g+h, i+j+k+l, m+n+o+p] */
84 u64x2 merge3 = vpaddlq_u32 (merge2);
85 /* u64x2--> [a+b+c+d+e+f+g+h, i+j+k+l+m+n+o+p] */
86 return (u32) (vgetq_lane_u64 (merge3, 1) << 8) + vgetq_lane_u64 (merge3, 0);
90 u8x16_zero_byte_mask (u8x16 input)
92 return u16x8_zero_byte_mask ((u16x8) input);
96 u32x4_zero_byte_mask (u32x4 input)
98 return u16x8_zero_byte_mask ((u16x8) input);
102 u64x2_zero_byte_mask (u64x2 input)
104 return u16x8_zero_byte_mask ((u16x8) input);
109 #endif /* included_vector_neon_h */
112 * fd.io coding-style-patch-verification: ON
115 * eval: (c-set-style "gnu")