FD.io VPP  v20.05.1-6-gf53edbc3b
Vector Packet Processing
vector_avx2.h
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1 /*
2  * Copyright (c) 2018 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_avx2_h
17 #define included_vector_avx2_h
18 
19 #include <vppinfra/clib.h>
20 #include <x86intrin.h>
21 
22 /* *INDENT-OFF* */
23 #define foreach_avx2_vec256i \
24  _(i,8,32,epi8) _(i,16,16,epi16) _(i,32,8,epi32) _(i,64,4,epi64)
25 #define foreach_avx2_vec256u \
26  _(u,8,32,epi8) _(u,16,16,epi16) _(u,32,8,epi32) _(u,64,4,epi64)
27 #define foreach_avx2_vec256f \
28  _(f,32,8,ps) _(f,64,4,pd)
29 
30 #define _mm256_set1_epi64 _mm256_set1_epi64x
31 
32 /* splat, load_unaligned, store_unaligned, is_all_zero, is_equal,
33  is_all_equal */
34 #define _(t, s, c, i) \
35 static_always_inline t##s##x##c \
36 t##s##x##c##_splat (t##s x) \
37 { return (t##s##x##c) _mm256_set1_##i (x); } \
38 \
39 static_always_inline t##s##x##c \
40 t##s##x##c##_load_unaligned (void *p) \
41 { return (t##s##x##c) _mm256_loadu_si256 (p); } \
42 \
43 static_always_inline void \
44 t##s##x##c##_store_unaligned (t##s##x##c v, void *p) \
45 { _mm256_storeu_si256 ((__m256i *) p, (__m256i) v); } \
46 \
47 static_always_inline int \
48 t##s##x##c##_is_all_zero (t##s##x##c x) \
49 { return _mm256_testz_si256 ((__m256i) x, (__m256i) x); } \
50 \
51 static_always_inline int \
52 t##s##x##c##_is_equal (t##s##x##c a, t##s##x##c b) \
53 { return t##s##x##c##_is_all_zero (a ^ b); } \
54 \
55 static_always_inline int \
56 t##s##x##c##_is_all_equal (t##s##x##c v, t##s x) \
57 { return t##s##x##c##_is_equal (v, t##s##x##c##_splat (x)); } \
58 \
59 static_always_inline t##s##x##c \
60 t##s##x##c##_interleave_lo (t##s##x##c a, t##s##x##c b) \
61 { return (t##s##x##c) _mm256_unpacklo_##i ((__m256i) a, (__m256i) b); } \
62 \
63 static_always_inline t##s##x##c \
64 t##s##x##c##_interleave_hi (t##s##x##c a, t##s##x##c b) \
65 { return (t##s##x##c) _mm256_unpackhi_##i ((__m256i) a, (__m256i) b); } \
66 
67 
69 #undef _
70 /* *INDENT-ON* */
71 
72 always_inline u32x8
73 u32x8_permute (u32x8 v, u32x8 idx)
74 {
75  return (u32x8) _mm256_permutevar8x32_epi32 ((__m256i) v, (__m256i) idx);
76 }
77 
78 /* _extract_lo, _extract_hi */
79 /* *INDENT-OFF* */
80 #define _(t1,t2) \
81 always_inline t1 \
82 t2##_extract_lo (t2 v) \
83 { return (t1) _mm256_extracti128_si256 ((__m256i) v, 0); } \
84 \
85 always_inline t1 \
86 t2##_extract_hi (t2 v) \
87 { return (t1) _mm256_extracti128_si256 ((__m256i) v, 1); } \
88 \
89 always_inline t2 \
90 t2##_insert_lo (t2 v1, t1 v2) \
91 { return (t2) _mm256_inserti128_si256 ((__m256i) v1, (__m128i) v2, 0); }\
92 \
93 always_inline t2 \
94 t2##_insert_hi (t2 v1, t1 v2) \
95 { return (t2) _mm256_inserti128_si256 ((__m256i) v1, (__m128i) v2, 1); }\
96 
97 _(u8x16, u8x32)
98 _(u16x8, u16x16)
99 _(u32x4, u32x8)
100 _(u64x2, u64x4)
101 #undef _
102 /* *INDENT-ON* */
103 
104 
105 
106 
108 u8x32_msb_mask (u8x32 v)
109 {
110  return _mm256_movemask_epi8 ((__m256i) v);
111 }
112 
113 /* _extend_to_ */
114 /* *INDENT-OFF* */
115 #define _(f,t,i) \
116 static_always_inline t \
117 f##_extend_to_##t (f x) \
118 { return (t) _mm256_cvt##i ((__m128i) x); }
119 
120 _(u16x8, u32x8, epu16_epi32)
121 _(u16x8, u64x4, epu16_epi64)
122 _(u32x4, u64x4, epu32_epi64)
123 _(u8x16, u16x16, epu8_epi64)
124 _(u8x16, u32x8, epu8_epi32)
125 _(u8x16, u64x4, epu8_epi64)
126 _(i16x8, i32x8, epi16_epi32)
127 _(i16x8, i64x4, epi16_epi64)
128 _(i32x4, i64x4, epi32_epi64)
129 _(i8x16, i16x16, epi8_epi64)
130 _(i8x16, i32x8, epi8_epi32)
131 _(i8x16, i64x4, epi8_epi64)
132 #undef _
133 /* *INDENT-ON* */
134 
137 {
138  u8x32 swap = {
139  7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8,
140  7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8,
141  };
142  return (u64x4) _mm256_shuffle_epi8 ((__m256i) v, (__m256i) swap);
143 }
144 
147 {
148  u8x32 swap = {
149  3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12,
150  3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
151  };
152  return (u32x8) _mm256_shuffle_epi8 ((__m256i) v, (__m256i) swap);
153 }
154 
157 {
158  u8x32 swap = {
159  1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10, 13, 12, 15, 14,
160  1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10, 13, 12, 15, 14
161  };
162  return (u16x16) _mm256_shuffle_epi8 ((__m256i) v, (__m256i) swap);
163 }
164 
166 u32x8_hadd (u32x8 v1, u32x8 v2)
167 {
168  return (u32x8) _mm256_hadd_epi32 ((__m256i) v1, (__m256i) v2);
169 }
170 
173 {
174  const u16x16 masks[17] = {
175  {0},
176  {-1},
177  {-1, -1},
178  {-1, -1, -1},
179  {-1, -1, -1, -1},
180  {-1, -1, -1, -1, -1},
181  {-1, -1, -1, -1, -1, -1},
182  {-1, -1, -1, -1, -1, -1, -1},
183  {-1, -1, -1, -1, -1, -1, -1, -1},
184  {-1, -1, -1, -1, -1, -1, -1, -1, -1},
185  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
186  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
187  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
188  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
189  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
190  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
191  {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
192  };
193 
194  ASSERT (n_last < 17);
195 
196  return v & masks[16 - n_last];
197 }
198 
201 {
202  return (f32x8) _mm256_cvtepi32_ps ((__m256i) v);
203 }
204 
207 {
208  return (u32x8) _mm256_cvttps_epi32 ((__m256) v);
209 }
210 
211 #define u32x8_blend(a,b,m) \
212  (u32x8) _mm256_blend_epi32 ((__m256i) a, (__m256i) b, m)
213 
214 #define u16x16_blend(v1, v2, mask) \
215  (u16x16) _mm256_blend_epi16 ((__m256i) (v1), (__m256i) (v2), mask)
216 
218 u64x4_gather (void *p0, void *p1, void *p2, void *p3)
219 {
220  u64x4 r = {
221  *(u64 *) p0, *(u64 *) p1, *(u64 *) p2, *(u64 *) p3
222  };
223  return r;
224 }
225 
227 u32x8_gather (void *p0, void *p1, void *p2, void *p3, void *p4, void *p5,
228  void *p6, void *p7)
229 {
230  u32x8 r = {
231  *(u32 *) p0, *(u32 *) p1, *(u32 *) p2, *(u32 *) p3,
232  *(u32 *) p4, *(u32 *) p5, *(u32 *) p6, *(u32 *) p7,
233  };
234  return r;
235 }
236 
237 
239 u64x4_scatter (u64x4 r, void *p0, void *p1, void *p2, void *p3)
240 {
241  *(u64 *) p0 = r[0];
242  *(u64 *) p1 = r[1];
243  *(u64 *) p2 = r[2];
244  *(u64 *) p3 = r[3];
245 }
246 
248 u32x8_scatter (u32x8 r, void *p0, void *p1, void *p2, void *p3, void *p4,
249  void *p5, void *p6, void *p7)
250 {
251  *(u32 *) p0 = r[0];
252  *(u32 *) p1 = r[1];
253  *(u32 *) p2 = r[2];
254  *(u32 *) p3 = r[3];
255  *(u32 *) p4 = r[4];
256  *(u32 *) p5 = r[5];
257  *(u32 *) p6 = r[6];
258  *(u32 *) p7 = r[7];
259 }
260 
262 u64x4_scatter_one (u64x4 r, int index, void *p)
263 {
264  *(u64 *) p = r[index];
265 }
266 
268 u32x8_scatter_one (u32x8 r, int index, void *p)
269 {
270  *(u32 *) p = r[index];
271 }
272 
274 u8x32_is_greater (u8x32 v1, u8x32 v2)
275 {
276  return (u8x32) _mm256_cmpgt_epi8 ((__m256i) v1, (__m256i) v2);
277 }
278 
280 u8x32_blend (u8x32 v1, u8x32 v2, u8x32 mask)
281 {
282  return (u8x32) _mm256_blendv_epi8 ((__m256i) v1, (__m256i) v2,
283  (__m256i) mask);
284 }
285 
286 #define u32x8_permute_lanes(a, b, m) \
287  (u32x8) _mm256_permute2x128_si256 ((__m256i) a, (__m256i) b, m)
288 #define u64x4_permute_lanes(a, b, m) \
289  (u64x4) _mm256_permute2x128_si256 ((__m256i) a, (__m256i) b, m)
290 
292 u32x8_min (u32x8 a, u32x8 b)
293 {
294  return (u32x8) _mm256_min_epu32 ((__m256i) a, (__m256i) b);
295 }
296 
299 {
300  return u32x4_min_scalar (u32x4_min (u32x8_extract_lo (v),
301  u32x8_extract_hi (v)));
302 }
303 
305 u32x8_transpose (u32x8 a[8])
306 {
307  u64x4 r[8], x, y;
308 
309  r[0] = (u64x4) u32x8_interleave_lo (a[0], a[1]);
310  r[1] = (u64x4) u32x8_interleave_hi (a[0], a[1]);
311  r[2] = (u64x4) u32x8_interleave_lo (a[2], a[3]);
312  r[3] = (u64x4) u32x8_interleave_hi (a[2], a[3]);
313  r[4] = (u64x4) u32x8_interleave_lo (a[4], a[5]);
314  r[5] = (u64x4) u32x8_interleave_hi (a[4], a[5]);
315  r[6] = (u64x4) u32x8_interleave_lo (a[6], a[7]);
316  r[7] = (u64x4) u32x8_interleave_hi (a[6], a[7]);
317 
318  x = u64x4_interleave_lo (r[0], r[2]);
319  y = u64x4_interleave_lo (r[4], r[6]);
320  a[0] = u32x8_permute_lanes (x, y, 0x20);
321  a[4] = u32x8_permute_lanes (x, y, 0x31);
322 
323  x = u64x4_interleave_hi (r[0], r[2]);
324  y = u64x4_interleave_hi (r[4], r[6]);
325  a[1] = u32x8_permute_lanes (x, y, 0x20);
326  a[5] = u32x8_permute_lanes (x, y, 0x31);
327 
328  x = u64x4_interleave_lo (r[1], r[3]);
329  y = u64x4_interleave_lo (r[5], r[7]);
330  a[2] = u32x8_permute_lanes (x, y, 0x20);
331  a[6] = u32x8_permute_lanes (x, y, 0x31);
332 
333  x = u64x4_interleave_hi (r[1], r[3]);
334  y = u64x4_interleave_hi (r[5], r[7]);
335  a[3] = u32x8_permute_lanes (x, y, 0x20);
336  a[7] = u32x8_permute_lanes (x, y, 0x31);
337 }
338 
341 {
342  u64x4 r[4];
343 
344  r[0] = u64x4_interleave_lo (a[0], a[1]);
345  r[1] = u64x4_interleave_hi (a[0], a[1]);
346  r[2] = u64x4_interleave_lo (a[2], a[3]);
347  r[3] = u64x4_interleave_hi (a[2], a[3]);
348 
349  a[0] = u64x4_permute_lanes (r[0], r[2], 0x20);
350  a[1] = u64x4_permute_lanes (r[1], r[3], 0x20);
351  a[2] = u64x4_permute_lanes (r[0], r[2], 0x31);
352  a[3] = u64x4_permute_lanes (r[1], r[3], 0x31);
353 }
354 
355 #endif /* included_vector_avx2_h */
356 
357 /*
358  * fd.io coding-style-patch-verification: ON
359  *
360  * Local Variables:
361  * eval: (c-set-style "gnu")
362  * End:
363  */
a
Definition: bitmap.h:538
unsigned long u64
Definition: types.h:89
u16x16 u64x4 static_always_inline u32 u8x32_msb_mask(u8x32 v)
Definition: vector_avx2.h:108
foreach_avx2_vec256i static foreach_avx2_vec256u u32x8 u32x8_permute(u32x8 v, u32x8 idx)
Definition: vector_avx2.h:73
static_always_inline u32 u32x8_min_scalar(u32x8 v)
Definition: vector_avx2.h:298
static_always_inline u16x16 u16x16_mask_last(u16x16 v, u8 n_last)
Definition: vector_avx2.h:172
unsigned char u8
Definition: types.h:56
static_always_inline void u64x4_scatter(u64x4 r, void *p0, void *p1, void *p2, void *p3)
Definition: vector_avx2.h:239
epu16_epi64 epu8_epi64 epu8_epi64 epi16_epi64 i16x16
Definition: vector_avx2.h:129
#define static_always_inline
Definition: clib.h:106
static_always_inline void u64x4_scatter_one(u64x4 r, int index, void *p)
Definition: vector_avx2.h:262
unsigned int u32
Definition: types.h:88
#define foreach_avx2_vec256i
Definition: vector_avx2.h:23
epu16_epi64 epu8_epi64 epu8_epi64 epi16_epi64 epi8_epi64 epi8_epi64 static_always_inline u64x4 u64x4_byte_swap(u64x4 v)
Definition: vector_avx2.h:136
i32x4
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:683
static_always_inline void u32x8_scatter(u32x8 r, void *p0, void *p1, void *p2, void *p3, void *p4, void *p5, void *p6, void *p7)
Definition: vector_avx2.h:248
static_always_inline u64x4 u64x4_gather(void *p0, void *p1, void *p2, void *p3)
Definition: vector_avx2.h:218
static_always_inline u32x8 u32x8_byte_swap(u32x8 v)
Definition: vector_avx2.h:146
#define always_inline
Definition: ipsec.h:28
static_always_inline void u32x8_transpose(u32x8 a[8])
Definition: vector_avx2.h:305
static_always_inline u16x16 u16x16_byte_swap(u16x16 v)
Definition: vector_avx2.h:156
static_always_inline void u32x8_scatter_one(u32x8 r, int index, void *p)
Definition: vector_avx2.h:268
static_always_inline u32 u32x4_min_scalar(u32x4 v)
Definition: vector_neon.h:186
#define ASSERT(truth)
static_always_inline u32x8 u32x8_hadd(u32x8 v1, u32x8 v2)
Definition: vector_avx2.h:166
vmrglw i16x8
static_always_inline u32x8 u32x8_min(u32x8 a, u32x8 b)
Definition: vector_avx2.h:292
static_always_inline u8x32 u8x32_is_greater(u8x32 v1, u8x32 v2)
Definition: vector_avx2.h:274
#define u64x4_permute_lanes(a, b, m)
Definition: vector_avx2.h:288
#define foreach_avx2_vec256u
Definition: vector_avx2.h:25
static_always_inline u32x8 u32x8_from_f32x8(f32x8 v)
Definition: vector_avx2.h:206
epu16_epi64 epu8_epi64 epu8_epi64 i64x4
Definition: vector_avx2.h:127
u64x4
Definition: vector_avx2.h:121
#define u32x8_permute_lanes(a, b, m)
Definition: vector_avx2.h:286
unsigned long long u32x4
Definition: ixge.c:28
static_always_inline void u64x4_transpose(u64x4 a[8])
Definition: vector_avx2.h:340
epu16_epi64 u16x16
Definition: vector_avx2.h:123
static_always_inline f32x8 f32x8_from_u32x8(u32x8 v)
Definition: vector_avx2.h:200
static_always_inline u8x32 u8x32_blend(u8x32 v1, u8x32 v2, u8x32 mask)
Definition: vector_avx2.h:280
static_always_inline u32x8 u32x8_gather(void *p0, void *p1, void *p2, void *p3, void *p4, void *p5, void *p6, void *p7)
Definition: vector_avx2.h:227