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
|
/*
* Copyright (c) 2015-2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* noodle scan parts for SSE */
static really_inline m128 getMask(u8 c, bool noCase) {
u8 k = caseClear8(c, noCase);
return set16x8(k);
}
static really_inline m128 getCaseMask(void) {
return set16x8(0xdf);
}
static really_inline
hwlm_error_t scanSingleShort(const struct noodTable *n, const u8 *buf,
size_t len, bool noCase, m128 caseMask, m128 mask1,
const struct cb_info *cbi, size_t start,
size_t end) {
const u8 *d = buf + start;
size_t l = end - start;
DEBUG_PRINTF("l %zu\n", l);
assert(l <= 16);
if (!l) {
return HWLM_SUCCESS;
}
m128 v = zeroes128();
// we don't have a clever way of doing this move yet
memcpy(&v, d, l);
if (noCase) {
v = and128(v, caseMask);
}
// mask out where we can't match
u32 mask = (0xFFFF >> (16 - l));
u32 z = mask & movemask128(eq128(mask1, v));
SINGLE_ZSCAN();
return HWLM_SUCCESS;
}
static really_inline
hwlm_error_t scanSingleUnaligned(const struct noodTable *n, const u8 *buf,
size_t len, size_t offset, bool noCase,
m128 caseMask, m128 mask1,
const struct cb_info *cbi, size_t start,
size_t end) {
const u8 *d = buf + offset;
DEBUG_PRINTF("start %zu end %zu offset %zu\n", start, end, offset);
const size_t l = end - start;
m128 v = loadu128(d);
if (noCase) {
v = and128(v, caseMask);
}
u32 buf_off = start - offset;
u32 mask = ((1 << l) - 1) << buf_off;
u32 z = mask & movemask128(eq128(mask1, v));
DEBUG_PRINTF("mask 0x%08x z 0x%08x\n", mask, z);
z &= mask;
SINGLE_ZSCAN();
return HWLM_SUCCESS;
}
static really_inline
hwlm_error_t scanDoubleShort(const struct noodTable *n, const u8 *buf,
size_t len, bool noCase, m128 caseMask, m128 mask1,
m128 mask2, const struct cb_info *cbi,
size_t start, size_t end) {
const u8 *d = buf + start;
size_t l = end - start;
if (!l) {
return HWLM_SUCCESS;
}
assert(l <= 32);
DEBUG_PRINTF("d %zu\n", d - buf);
m128 v = zeroes128();
memcpy(&v, d, l);
if (noCase) {
v = and128(v, caseMask);
}
u32 z = movemask128(and128(lshiftbyte_m128(eq128(mask1, v), 1),
eq128(mask2, v)));
// mask out where we can't match
u32 mask = (0xFFFF >> (16 - l));
z &= mask;
DOUBLE_ZSCAN();
return HWLM_SUCCESS;
}
static really_inline
hwlm_error_t scanDoubleUnaligned(const struct noodTable *n, const u8 *buf,
size_t len, size_t offset, bool noCase,
m128 caseMask, m128 mask1, m128 mask2,
const struct cb_info *cbi, size_t start,
size_t end) {
const u8 *d = buf + offset;
DEBUG_PRINTF("start %zu end %zu offset %zu\n", start, end, offset);
size_t l = end - start;
m128 v = loadu128(d);
if (noCase) {
v = and128(v, caseMask);
}
u32 z = movemask128(and128(lshiftbyte_m128(eq128(mask1, v), 1),
eq128(mask2, v)));
// mask out where we can't match
u32 buf_off = start - offset;
u32 mask = ((1 << l) - 1) << buf_off;
DEBUG_PRINTF("mask 0x%08x z 0x%08x\n", mask, z);
z &= mask;
DOUBLE_ZSCAN();
return HWLM_SUCCESS;
}
static really_inline
hwlm_error_t scanSingleFast(const struct noodTable *n, const u8 *buf,
size_t len, bool noCase, m128 caseMask, m128 mask1,
const struct cb_info *cbi, size_t start,
size_t end) {
const u8 *d = buf + start, *e = buf + end;
assert(d < e);
for (; d < e; d += 16) {
m128 v = noCase ? and128(load128(d), caseMask) : load128(d);
u32 z = movemask128(eq128(mask1, v));
// On large packet buffers, this prefetch appears to get us about 2%.
__builtin_prefetch(d + 128);
SINGLE_ZSCAN();
}
return HWLM_SUCCESS;
}
static really_inline
hwlm_error_t scanDoubleFast(const struct noodTable *n, const u8 *buf,
size_t len, bool noCase, m128 caseMask, m128 mask1,
m128 mask2, const struct cb_info *cbi, size_t start,
size_t end) {
const u8 *d = buf + start, *e = buf + end;
assert(d < e);
m128 lastz1 = zeroes128();
for (; d < e; d += 16) {
m128 v = noCase ? and128(load128(d), caseMask) : load128(d);
m128 z1 = eq128(mask1, v);
m128 z2 = eq128(mask2, v);
u32 z = movemask128(and128(palignr(z1, lastz1, 15), z2));
lastz1 = z1;
// On large packet buffers, this prefetch appears to get us about 2%.
__builtin_prefetch(d + 128);
DEBUG_PRINTF("z 0x%08x\n", z);
DOUBLE_ZSCAN();
}
return HWLM_SUCCESS;
}
|
