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Christophe Fontaine33e81952016-12-19 14:41:52 +01001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
16#ifndef included_vector_neon_h
17#define included_vector_neon_h
18#include <arm_neon.h>
19
Christophe Fontaine33e81952016-12-19 14:41:52 +010020/* Arithmetic */
Christophe Fontaine33e81952016-12-19 14:41:52 +010021#define u16x8_sub_saturate(a,b) vsubq_u16(a,b)
22#define i16x8_sub_saturate(a,b) vsubq_s16(a,b)
23
Gabriel Ganneb81831d2017-12-05 17:33:37 +010024/* Converts all ones/zeros compare mask to bitmap. */
25always_inline u32
26u8x16_compare_byte_mask (u8x16 x)
27{
Adrian Oanca0b8792f2018-02-15 15:44:51 +010028 uint8x16_t mask_shift =
29 { -7, -6, -5, -4, -3, -2, -1, 0, -7, -6, -5, -4, -3, -2, -1, 0 };
30 uint8x16_t mask_and = vdupq_n_u8 (0x80);
31 x = vandq_u8 (x, mask_and);
32 x = vshlq_u8 (x, vreinterpretq_s8_u8 (mask_shift));
33 x = vpaddq_u8 (x, x);
34 x = vpaddq_u8 (x, x);
35 x = vpaddq_u8 (x, x);
36 return vgetq_lane_u8 (x, 0) | (vgetq_lane_u8 (x, 1) << 8);
Gabriel Ganneb81831d2017-12-05 17:33:37 +010037}
Christophe Fontaine33e81952016-12-19 14:41:52 +010038
39always_inline u32
40u16x8_zero_byte_mask (u16x8 input)
41{
42 u8x16 vall_one = vdupq_n_u8 (0x0);
43 u8x16 res_values = { 0x01, 0x02, 0x04, 0x08,
44 0x10, 0x20, 0x40, 0x80,
45 0x01, 0x02, 0x04, 0x08,
46 0x10, 0x20, 0x40, 0x80
47 };
48
49 /* input --> [0x80, 0x40, 0x01, 0xf0, ... ] */
50 u8x16 test_result =
51 vreinterpretq_u8_u16 (vceqq_u16 (input, vreinterpretq_u16_u8 (vall_one)));
52 u8x16 before_merge = vminq_u8 (test_result, res_values);
53 /*before_merge--> [0x80, 0x00, 0x00, 0x10, ... ] */
54 /* u8x16 --> [a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p] */
55 /* pair add until we have 2 uint64_t */
56 u16x8 merge1 = vpaddlq_u8 (before_merge);
57 /* u16x8--> [a+b,c+d, e+f,g+h, i+j,k+l, m+n,o+p] */
58 u32x4 merge2 = vpaddlq_u16 (merge1);
59 /* u32x4--> [a+b+c+d, e+f+g+h, i+j+k+l, m+n+o+p] */
60 u64x2 merge3 = vpaddlq_u32 (merge2);
61 /* u64x2--> [a+b+c+d+e+f+g+h, i+j+k+l+m+n+o+p] */
62 return (u32) (vgetq_lane_u64 (merge3, 1) << 8) + vgetq_lane_u64 (merge3, 0);
63}
64
Adrian Oanca22ac59b2018-02-23 16:27:41 +010065always_inline u32
66u8x16_zero_byte_mask (u8x16 input)
67{
68 return u16x8_zero_byte_mask ((u16x8) input);
69}
70
71always_inline u32
72u32x4_zero_byte_mask (u32x4 input)
73{
74 return u16x8_zero_byte_mask ((u16x8) input);
75}
76
77always_inline u32
78u64x2_zero_byte_mask (u64x2 input)
79{
80 return u16x8_zero_byte_mask ((u16x8) input);
81}
82
Sirshak Das536953d2018-06-26 13:08:46 -050083/* *INDENT-OFF* */
84#define foreach_neon_vec128i \
85 _(i,8,16,s8) _(i,16,8,s16) _(i,32,4,s32) _(i,64,2,s64)
86#define foreach_neon_vec128u \
87 _(u,8,16,u8) _(u,16,8,u16) _(u,32,4,u32) _(u,64,2,u64)
88#define foreach_neon_vec128f \
89 _(f,32,4,f32) _(f,64,2,f64)
Adrian Oanca22ac59b2018-02-23 16:27:41 +010090
Sirshak Das536953d2018-06-26 13:08:46 -050091#define _(t, s, c, i) \
92static_always_inline t##s##x##c \
93t##s##x##c##_splat (t##s x) \
94{ return (t##s##x##c) vdupq_n_##i (x); } \
95\
96static_always_inline t##s##x##c \
97t##s##x##c##_load_unaligned (void *p) \
98{ return (t##s##x##c) vld1q_##i (p); } \
99\
100static_always_inline void \
101t##s##x##c##_store_unaligned (t##s##x##c v, void *p) \
102{ vst1q_##i (p, v); } \
103\
104static_always_inline int \
105t##s##x##c##_is_all_zero (t##s##x##c x) \
106{ return !(vaddvq_##i (x)); } \
107\
108static_always_inline int \
109t##s##x##c##_is_equal (t##s##x##c a, t##s##x##c b) \
110{ return t##s##x##c##_is_all_zero (a ^ b); } \
111\
112static_always_inline int \
113t##s##x##c##_is_all_equal (t##s##x##c v, t##s x) \
114{ return t##s##x##c##_is_equal (v, t##s##x##c##_splat (x)); }; \
Adrian Oanca22ac59b2018-02-23 16:27:41 +0100115
Sirshak Das536953d2018-06-26 13:08:46 -0500116foreach_neon_vec128i foreach_neon_vec128u
117
118#undef _
119/* *INDENT-ON* */
120
Sirshak Dasafc725a2018-07-27 01:13:33 -0500121static_always_inline u16x8
122u16x8_byte_swap (u16x8 v)
123{
Sirshak Das6da42de2018-08-22 12:02:04 +0800124 return (u16x8) vrev16q_u8 ((u8x16) v);
Sirshak Dasafc725a2018-07-27 01:13:33 -0500125}
126
127static_always_inline u8x16
128u8x16_shuffle (u8x16 v, u8x16 m)
129{
130 return (u8x16) vqtbl1q_u8 (v, m);
131}
132
Sirshak Das61f325d2018-08-03 11:24:51 -0500133static_always_inline u32x4
134u32x4_hadd (u32x4 v1, u32x4 v2)
135{
136 return (u32x4) vpaddq_u32 (v1, v2);
137}
138
Sirshak Das8e5d5db2018-08-22 14:04:33 +0800139static_always_inline u64x2
140u32x4_extend_to_u64x2 (u32x4 v)
141{
142 return vmovl_u32 (vget_low_u32 (v));
143}
144
Sirshak Das759226e2018-08-22 08:46:52 +0800145static_always_inline u64x2
146u32x4_extend_to_u64x2_high (u32x4 v)
147{
Sirshak Das4f611172018-10-09 11:28:44 -0500148 return vmovl_high_u32 (v);
Sirshak Das759226e2018-08-22 08:46:52 +0800149}
150
Sirshak Das536953d2018-06-26 13:08:46 -0500151#define CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE
152#define CLIB_VEC128_SPLAT_DEFINED
Christophe Fontaine33e81952016-12-19 14:41:52 +0100153#endif /* included_vector_neon_h */
154
155/*
156 * fd.io coding-style-patch-verification: ON
157 *
158 * Local Variables:
159 * eval: (c-set-style "gnu")
160 * End:
161 */