1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/* adler32_avx512_vnni.c -- compute the Adler-32 checksum of a data stream
* Based on Brian Bockelman's AVX2 version
* Copyright (C) 1995-2011 Mark Adler
* Authors:
* Adam Stylinski <kungfujesus06@gmail.com>
* Brian Bockelman <bockelman@gmail.com>
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#ifdef X86_AVX512VNNI
#include "zbuild.h"
#include "adler32_p.h"
#include "arch_functions.h"
#include <immintrin.h>
#include "x86_intrins.h"
#include "adler32_avx512_p.h"
#include "adler32_avx2_p.h"
Z_INTERNAL uint32_t adler32_avx512_vnni(uint32_t adler, const uint8_t *src, size_t len) {
uint32_t adler0, adler1;
adler1 = (adler >> 16) & 0xffff;
adler0 = adler & 0xffff;
rem_peel:
if (len < 32)
return adler32_ssse3(adler, src, len);
if (len < 64)
return adler32_avx2(adler, src, len);
const __m512i dot2v = _mm512_set_epi8(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63, 64);
const __m512i zero = _mm512_setzero_si512();
__m512i vs1, vs2;
while (len >= 64) {
vs1 = _mm512_zextsi128_si512(_mm_cvtsi32_si128(adler0));
vs2 = _mm512_zextsi128_si512(_mm_cvtsi32_si128(adler1));
size_t k = ALIGN_DOWN(MIN(len, NMAX), 64);
len -= k;
__m512i vs1_0 = vs1;
__m512i vs3 = _mm512_setzero_si512();
/* We might get a tad bit more ILP here if we sum to a second register in the loop */
__m512i vs2_1 = _mm512_setzero_si512();
__m512i vbuf0, vbuf1;
/* Remainder peeling */
if (k % 128) {
vbuf1 = _mm512_loadu_si512((__m512i*)src);
src += 64;
k -= 64;
__m512i vs1_sad = _mm512_sad_epu8(vbuf1, zero);
vs1 = _mm512_add_epi32(vs1, vs1_sad);
vs3 = _mm512_add_epi32(vs3, vs1_0);
vs2 = _mm512_dpbusd_epi32(vs2, vbuf1, dot2v);
vs1_0 = vs1;
}
/* Manually unrolled this loop by 2 for an decent amount of ILP */
while (k >= 128) {
/*
vs1 = adler + sum(c[i])
vs2 = sum2 + 64 vs1 + sum( (64-i+1) c[i] )
*/
vbuf0 = _mm512_loadu_si512((__m512i*)src);
vbuf1 = _mm512_loadu_si512((__m512i*)(src + 64));
src += 128;
k -= 128;
__m512i vs1_sad = _mm512_sad_epu8(vbuf0, zero);
vs1 = _mm512_add_epi32(vs1, vs1_sad);
vs3 = _mm512_add_epi32(vs3, vs1_0);
/* multiply-add, resulting in 16 ints. Fuse with sum stage from prior versions, as we now have the dp
* instructions to eliminate them */
vs2 = _mm512_dpbusd_epi32(vs2, vbuf0, dot2v);
vs3 = _mm512_add_epi32(vs3, vs1);
vs1_sad = _mm512_sad_epu8(vbuf1, zero);
vs1 = _mm512_add_epi32(vs1, vs1_sad);
vs2_1 = _mm512_dpbusd_epi32(vs2_1, vbuf1, dot2v);
vs1_0 = vs1;
}
vs3 = _mm512_slli_epi32(vs3, 6);
vs2 = _mm512_add_epi32(vs2, vs3);
vs2 = _mm512_add_epi32(vs2, vs2_1);
adler0 = partial_hsum(vs1) % BASE;
adler1 = _mm512_reduce_add_epu32(vs2) % BASE;
}
adler = adler0 | (adler1 << 16);
/* Process tail (len < 64). */
if (len) {
goto rem_peel;
}
return adler;
}
/* Use 256-bit vectors when copying because 512-bit variant is slower. */
Z_INTERNAL uint32_t adler32_copy_avx512_vnni(uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len) {
uint32_t adler0, adler1;
adler1 = (adler >> 16) & 0xffff;
adler0 = adler & 0xffff;
rem_peel_copy:
if (len < 32) {
/* This handles the remaining copies, just call normal adler checksum after this */
__mmask32 storemask = (0xFFFFFFFFUL >> (32 - len));
__m256i copy_vec = _mm256_maskz_loadu_epi8(storemask, src);
_mm256_mask_storeu_epi8(dst, storemask, copy_vec);
return adler32_ssse3(adler, src, len);
}
const __m256i dot2v = _mm256_set_epi8(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32);
const __m256i zero = _mm256_setzero_si256();
__m256i vs1, vs2;
while (len >= 32) {
vs1 = _mm256_zextsi128_si256(_mm_cvtsi32_si128(adler0));
vs2 = _mm256_zextsi128_si256(_mm_cvtsi32_si128(adler1));
size_t k = ALIGN_DOWN(MIN(len, NMAX), 32);
len -= k;
__m256i vs1_0 = vs1;
__m256i vs3 = _mm256_setzero_si256();
/* We might get a tad bit more ILP here if we sum to a second register in the loop */
__m256i vs2_1 = _mm256_setzero_si256();
__m256i vbuf0, vbuf1;
/* Remainder peeling */
if (k % 64) {
vbuf1 = _mm256_loadu_si256((__m256i*)src);
_mm256_storeu_si256((__m256i*)dst, vbuf1);
dst += 32;
src += 32;
k -= 32;
__m256i vs1_sad = _mm256_sad_epu8(vbuf1, zero);
vs1 = _mm256_add_epi32(vs1, vs1_sad);
vs3 = _mm256_add_epi32(vs3, vs1_0);
vs2 = _mm256_dpbusd_epi32(vs2, vbuf1, dot2v);
vs1_0 = vs1;
}
/* Manually unrolled this loop by 2 for an decent amount of ILP */
while (k >= 64) {
/*
vs1 = adler + sum(c[i])
vs2 = sum2 + 64 vs1 + sum( (64-i+1) c[i] )
*/
vbuf0 = _mm256_loadu_si256((__m256i*)src);
vbuf1 = _mm256_loadu_si256((__m256i*)(src + 32));
_mm256_storeu_si256((__m256i*)dst, vbuf0);
_mm256_storeu_si256((__m256i*)(dst + 32), vbuf1);
dst += 64;
src += 64;
k -= 64;
__m256i vs1_sad = _mm256_sad_epu8(vbuf0, zero);
vs1 = _mm256_add_epi32(vs1, vs1_sad);
vs3 = _mm256_add_epi32(vs3, vs1_0);
/* multiply-add, resulting in 16 ints. Fuse with sum stage from prior versions, as we now have the dp
* instructions to eliminate them */
vs2 = _mm256_dpbusd_epi32(vs2, vbuf0, dot2v);
vs3 = _mm256_add_epi32(vs3, vs1);
vs1_sad = _mm256_sad_epu8(vbuf1, zero);
vs1 = _mm256_add_epi32(vs1, vs1_sad);
vs2_1 = _mm256_dpbusd_epi32(vs2_1, vbuf1, dot2v);
vs1_0 = vs1;
}
vs3 = _mm256_slli_epi32(vs3, 5);
vs2 = _mm256_add_epi32(vs2, vs3);
vs2 = _mm256_add_epi32(vs2, vs2_1);
adler0 = partial_hsum256(vs1) % BASE;
adler1 = hsum256(vs2) % BASE;
}
adler = adler0 | (adler1 << 16);
/* Process tail (len < 64). */
if (len) {
goto rem_peel_copy;
}
return adler;
}
#endif
|
