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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2016 Gvozden Nešković. All rights reserved.
*/
#if defined(__x86_64) && defined(HAVE_AVX512F)
#include <linux/simd_x86.h>
#include <sys/byteorder.h>
#include <sys/spa_checksum.h>
#include <zfs_fletcher.h>
#include <strings.h>
#define __asm __asm__ __volatile__
static void
fletcher_4_avx512f_init(fletcher_4_ctx_t *ctx)
{
bzero(ctx->avx512, 4 * sizeof (zfs_fletcher_avx512_t));
}
static void
fletcher_4_avx512f_fini(fletcher_4_ctx_t *ctx, zio_cksum_t *zcp)
{
static const uint64_t
CcA[] = { 0, 0, 1, 3, 6, 10, 15, 21 },
CcB[] = { 28, 36, 44, 52, 60, 68, 76, 84 },
DcA[] = { 0, 0, 0, 1, 4, 10, 20, 35 },
DcB[] = { 56, 84, 120, 164, 216, 276, 344, 420 },
DcC[] = { 448, 512, 576, 640, 704, 768, 832, 896 };
uint64_t A, B, C, D;
uint64_t i;
A = ctx->avx512[0].v[0];
B = 8 * ctx->avx512[1].v[0];
C = 64 * ctx->avx512[2].v[0] - CcB[0] * ctx->avx512[1].v[0];
D = 512 * ctx->avx512[3].v[0] - DcC[0] * ctx->avx512[2].v[0] +
DcB[0] * ctx->avx512[1].v[0];
for (i = 1; i < 8; i++) {
A += ctx->avx512[0].v[i];
B += 8 * ctx->avx512[1].v[i] - i * ctx->avx512[0].v[i];
C += 64 * ctx->avx512[2].v[i] - CcB[i] * ctx->avx512[1].v[i] +
CcA[i] * ctx->avx512[0].v[i];
D += 512 * ctx->avx512[3].v[i] - DcC[i] * ctx->avx512[2].v[i] +
DcB[i] * ctx->avx512[1].v[i] - DcA[i] * ctx->avx512[0].v[i];
}
ZIO_SET_CHECKSUM(zcp, A, B, C, D);
}
#define FLETCHER_4_AVX512_RESTORE_CTX(ctx) \
{ \
__asm("vmovdqu64 %0, %%zmm0" :: "m" ((ctx)->avx512[0])); \
__asm("vmovdqu64 %0, %%zmm1" :: "m" ((ctx)->avx512[1])); \
__asm("vmovdqu64 %0, %%zmm2" :: "m" ((ctx)->avx512[2])); \
__asm("vmovdqu64 %0, %%zmm3" :: "m" ((ctx)->avx512[3])); \
}
#define FLETCHER_4_AVX512_SAVE_CTX(ctx) \
{ \
__asm("vmovdqu64 %%zmm0, %0" : "=m" ((ctx)->avx512[0])); \
__asm("vmovdqu64 %%zmm1, %0" : "=m" ((ctx)->avx512[1])); \
__asm("vmovdqu64 %%zmm2, %0" : "=m" ((ctx)->avx512[2])); \
__asm("vmovdqu64 %%zmm3, %0" : "=m" ((ctx)->avx512[3])); \
}
static void
fletcher_4_avx512f_native(fletcher_4_ctx_t *ctx, const void *buf, uint64_t size)
{
const uint32_t *ip = buf;
const uint32_t *ipend = (uint32_t *)((uint8_t *)ip + size);
kfpu_begin();
FLETCHER_4_AVX512_RESTORE_CTX(ctx);
for (; ip < ipend; ip += 8) {
__asm("vpmovzxdq %0, %%zmm4"::"m" (*ip));
__asm("vpaddq %zmm4, %zmm0, %zmm0");
__asm("vpaddq %zmm0, %zmm1, %zmm1");
__asm("vpaddq %zmm1, %zmm2, %zmm2");
__asm("vpaddq %zmm2, %zmm3, %zmm3");
}
FLETCHER_4_AVX512_SAVE_CTX(ctx);
kfpu_end();
}
static void
fletcher_4_avx512f_byteswap(fletcher_4_ctx_t *ctx, const void *buf,
uint64_t size)
{
static const uint64_t byteswap_mask = 0xFFULL;
const uint32_t *ip = buf;
const uint32_t *ipend = (uint32_t *)((uint8_t *)ip + size);
kfpu_begin();
FLETCHER_4_AVX512_RESTORE_CTX(ctx);
__asm("vpbroadcastq %0, %%zmm8" :: "r" (byteswap_mask));
__asm("vpsllq $8, %zmm8, %zmm9");
__asm("vpsllq $16, %zmm8, %zmm10");
__asm("vpsllq $24, %zmm8, %zmm11");
for (; ip < ipend; ip += 8) {
__asm("vpmovzxdq %0, %%zmm5"::"m" (*ip));
__asm("vpsrlq $24, %zmm5, %zmm6");
__asm("vpandd %zmm8, %zmm6, %zmm6");
__asm("vpsrlq $8, %zmm5, %zmm7");
__asm("vpandd %zmm9, %zmm7, %zmm7");
__asm("vpord %zmm6, %zmm7, %zmm4");
__asm("vpsllq $8, %zmm5, %zmm6");
__asm("vpandd %zmm10, %zmm6, %zmm6");
__asm("vpord %zmm6, %zmm4, %zmm4");
__asm("vpsllq $24, %zmm5, %zmm5");
__asm("vpandd %zmm11, %zmm5, %zmm5");
__asm("vpord %zmm5, %zmm4, %zmm4");
__asm("vpaddq %zmm4, %zmm0, %zmm0");
__asm("vpaddq %zmm0, %zmm1, %zmm1");
__asm("vpaddq %zmm1, %zmm2, %zmm2");
__asm("vpaddq %zmm2, %zmm3, %zmm3");
}
FLETCHER_4_AVX512_SAVE_CTX(ctx)
kfpu_end();
}
static boolean_t
fletcher_4_avx512f_valid(void)
{
return (zfs_avx512f_available());
}
const fletcher_4_ops_t fletcher_4_avx512f_ops = {
.init_native = fletcher_4_avx512f_init,
.fini_native = fletcher_4_avx512f_fini,
.compute_native = fletcher_4_avx512f_native,
.init_byteswap = fletcher_4_avx512f_init,
.fini_byteswap = fletcher_4_avx512f_fini,
.compute_byteswap = fletcher_4_avx512f_byteswap,
.valid = fletcher_4_avx512f_valid,
.name = "avx512f"
};
#endif /* defined(__x86_64) && defined(HAVE_AVX512F) */
|
