/
matching_amd64.s
185 lines (152 loc) · 2.82 KB
/
matching_amd64.s
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
// sift
// Copyright (C) 2014-2016 Sven Taute
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "textflag.h"
// func countNewlines(input []byte, length int) int
TEXT ·countNewlines(SB),NOSPLIT,$0-40
MOVQ input+0(FP), SI
MOVQ length+24(FP), CX
XORQ AX, AX
CMPQ CX, $16
JL small
// X0 = 16 x 0x00
// X1 = 16 x 0x01
// X2 = 16 x '\n'
// X3 = input buffer
PXOR X0, X0
MOVQ $0x0101010101010101, DX
MOVQ DX, X1
PUNPCKLQDQ X1, X1
MOVQ $0x0a0a0a0a0a0a0a0a, DX
MOVQ DX, X2
PUNPCKLQDQ X2, X2
PXOR X6, X6
CMPQ CX, $128*16
JL bigloop
hugeloop:
MOVQ $128, BX
PXOR X4, X4
hugeloop_inner:
MOVOU (SI), X3
PCMPEQB X2, X3
PAND X1, X3
PADDD X3, X4
ADDQ $16, SI
DECQ BX
JNZ hugeloop_inner
PSADBW X0, X4
PADDQ X4, X6
SUBQ $128*16, CX
CMPQ CX, $128*16
JGE hugeloop
bigloop:
CMPQ CX, $16
JL finish
MOVOU (SI), X3
PCMPEQB X2, X3
PAND X1, X3
PSADBW X0, X3
PADDQ X3, X6
SUBQ $16, CX
ADDQ $16, SI
JMP bigloop
finish:
PXOR X7, X7
MOVHLPS X6, X7
PADDQ X6, X7
MOVQ X7, AX
small:
TESTQ CX, CX
JZ done
CMPB (SI), $'\n'
JNE nonewline
INCQ AX
nonewline:
INCQ SI
DECQ CX
JMP small
done:
MOVQ AX, ret+32(FP)
RET
// func bytesToLower(input []byte, output []byte, length int)
TEXT ·bytesToLower(SB),NOSPLIT,$0-56
MOVQ input+0(FP), SI
MOVQ output+24(FP), DI
MOVQ length+48(FP), CX
// X0 = 16 x 0x00
// X1 = 16 x 0x25 (127 - 'Z')
// X2 = 16 x 0x65 (127 - 26)
// X3 = 16 x 0x20 ('a' - 'A')
// X4 = input buffer
XORQ AX, AX
CMPQ CX, $16
JL small
PXOR X0, X0
MOVQ $0x2525252525252525, DX
MOVQ DX, X1
PUNPCKLQDQ X1, X1
MOVQ $0x6565656565656565, DX
MOVQ DX, X2
PUNPCKLQDQ X2, X2
MOVQ $0x2020202020202020, DX
MOVQ DX, X3
PUNPCKLQDQ X3, X3
XORQ BX, BX
bigloop:
MOVOU (SI)(BX*8), X4
MOVOU X4, X5
PADDB X1, X5
PCMPGTB X2, X5
PAND X3, X5
PADDB X5, X4
MOVOU X4, (DI)(BX*8)
ADDQ $2, BX
SUBQ $16, CX
CMPQ CX, $16
JGE bigloop
TESTQ CX, CX
JZ done
SUBQ $16, CX
ADDQ CX, SI
ADDQ CX, DI
MOVOU (SI)(BX*8), X4
MOVOU X4, X5
PADDB X1, X5
PCMPGTB X2, X5
PAND X3, X5
PADDB X5, X4
MOVOU X4, (DI)(BX*8)
JMP done
small:
CLD
loop_small:
TESTQ CX, CX
JZ done
MOVB (SI), AX
CMPB AX, $'Z'
JA skip
CMPB AX, $'A'
JB skip
ADDB $0x20, AX
MOVB AX, (DI)
INCQ SI
INCQ DI
DECQ CX
JMP loop_small
skip:
MOVSB
DECQ CX
JMP loop_small
done:
RET