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)
23 /* Dummy. Aid making uniform macros */
24 #define vreinterpretq_u8_u8(a) a
26 /* Converts all ones/zeros compare mask to bitmap. */
28 u8x16_compare_byte_mask (u8x16 v)
30 uint8x16_t mask = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
31 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
33 /* v --> [0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0x00, ... ] */
34 uint8x16_t x = vandq_u8 (v, mask);
36 * x --> [0x01, 0x00, 0x04, 0x08, 0x10, 0x00, 0x40, 0x00, ... ] */
37 uint64x2_t x64 = vpaddlq_u32 (vpaddlq_u16 (vpaddlq_u8 (x)));
38 /* after merge, x64 --> [0x5D, 0x.. ] */
39 return (u32) (vgetq_lane_u64 (x64, 0) + (vgetq_lane_u64 (x64, 1) << 8));
43 #define foreach_neon_vec128i \
44 _(i,8,16,s8) _(i,16,8,s16) _(i,32,4,s32) _(i,64,2,s64)
45 #define foreach_neon_vec128u \
46 _(u,8,16,u8) _(u,16,8,u16) _(u,32,4,u32) _(u,64,2,u64)
47 #define foreach_neon_vec128f \
48 _(f,32,4,f32) _(f,64,2,f64)
50 #define _(t, s, c, i) \
51 static_always_inline t##s##x##c \
52 t##s##x##c##_splat (t##s x) \
53 { return (t##s##x##c) vdupq_n_##i (x); } \
55 static_always_inline t##s##x##c \
56 t##s##x##c##_load_unaligned (void *p) \
57 { return (t##s##x##c) vld1q_##i (p); } \
59 static_always_inline void \
60 t##s##x##c##_store_unaligned (t##s##x##c v, void *p) \
61 { vst1q_##i (p, v); } \
63 static_always_inline int \
64 t##s##x##c##_is_all_zero (t##s##x##c x) \
65 { return !(vaddvq_##i (x)); } \
67 static_always_inline int \
68 t##s##x##c##_is_equal (t##s##x##c a, t##s##x##c b) \
69 { return t##s##x##c##_is_all_zero (a ^ b); } \
71 static_always_inline int \
72 t##s##x##c##_is_all_equal (t##s##x##c v, t##s x) \
73 { return t##s##x##c##_is_equal (v, t##s##x##c##_splat (x)); }; \
75 static_always_inline u32 \
76 t##s##x##c##_zero_byte_mask (t##s##x##c x) \
77 { uint8x16_t v = vreinterpretq_u8_u##s (vceqq_##i (vdupq_n_##i(0), x)); \
78 return u8x16_compare_byte_mask (v); } \
80 foreach_neon_vec128i foreach_neon_vec128u
85 static_always_inline u16x8
86 u16x8_byte_swap (u16x8 v)
88 return (u16x8) vrev16q_u8 ((u8x16) v);
91 static_always_inline u8x16
92 u8x16_shuffle (u8x16 v, u8x16 m)
94 return (u8x16) vqtbl1q_u8 (v, m);
97 static_always_inline u32x4
98 u32x4_hadd (u32x4 v1, u32x4 v2)
100 return (u32x4) vpaddq_u32 (v1, v2);
103 static_always_inline u64x2
104 u32x4_extend_to_u64x2 (u32x4 v)
106 return vmovl_u32 (vget_low_u32 (v));
109 static_always_inline u64x2
110 u32x4_extend_to_u64x2_high (u32x4 v)
112 return vmovl_high_u32 (v);
115 /* Creates a mask made up of the MSB of each byte of the source vector */
116 static_always_inline u16
117 u8x16_msb_mask (u8x16 v)
120 { -7, -6, -5, -4, -3, -2, -1, 0, -7, -6, -5, -4, -3, -2, -1, 0 };
121 /* v --> [0x80, 0x7F, 0xF0, 0xAF, 0xF0, 0x00, 0xF2, 0x00, ... ] */
122 uint8x16_t x = vshlq_u8 (vandq_u8 (v, vdupq_n_u8 (0x80)), shift);
123 /* after (v & 0x80) >> shift,
124 * x --> [0x01, 0x00, 0x04, 0x08, 0x10, 0x00, 0x40, 0x00, ... ] */
125 uint64x2_t x64 = vpaddlq_u32 (vpaddlq_u16 (vpaddlq_u8 (x)));
126 /* after merge, x64 --> [0x5D, 0x.. ] */
127 return (u16) (vgetq_lane_u64 (x64, 0) + (vgetq_lane_u64 (x64, 1) << 8));
130 #define CLIB_HAVE_VEC128_MSB_MASK
132 #define CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE
133 #define CLIB_VEC128_SPLAT_DEFINED
134 #endif /* included_vector_neon_h */
137 * fd.io coding-style-patch-verification: ON
140 * eval: (c-set-style "gnu")