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
|
// Code generated by command: go run valid_print_asm.go -pkg ascii -out ../ascii/valid_print_amd64.s -stubs ../ascii/valid_print_amd64.go. DO NOT EDIT.
//go:build !purego
#include "textflag.h"
// func ValidPrintString(s string) bool
// Requires: AVX, AVX2, SSE4.1
TEXT ·ValidPrintString(SB), NOSPLIT, $0-17
MOVQ s_base+0(FP), AX
MOVQ s_len+8(FP), CX
CMPQ CX, $0x10
JB init_x86
BTL $0x08, github·com∕segmentio∕asm∕cpu·X86+0(SB)
JCS init_avx
init_x86:
CMPQ CX, $0x08
JB cmp4
MOVQ $0xdfdfdfdfdfdfdfe0, DX
MOVQ $0x0101010101010101, BX
MOVQ $0x8080808080808080, SI
cmp8:
MOVQ (AX), DI
MOVQ DI, R8
LEAQ (DI)(DX*1), R9
NOTQ R8
ANDQ R8, R9
LEAQ (DI)(BX*1), R8
ORQ R8, DI
ORQ R9, DI
ADDQ $0x08, AX
SUBQ $0x08, CX
TESTQ SI, DI
JNE done
CMPQ CX, $0x08
JB cmp4
JMP cmp8
cmp4:
CMPQ CX, $0x04
JB cmp3
MOVL (AX), DX
MOVL DX, BX
LEAL 3755991008(DX), SI
NOTL BX
ANDL BX, SI
LEAL 16843009(DX), BX
ORL BX, DX
ORL SI, DX
ADDQ $0x04, AX
SUBQ $0x04, CX
TESTL $0x80808080, DX
JNE done
cmp3:
CMPQ CX, $0x03
JB cmp2
MOVWLZX (AX), DX
MOVBLZX 2(AX), AX
SHLL $0x10, AX
ORL DX, AX
ORL $0x20000000, AX
JMP final
cmp2:
CMPQ CX, $0x02
JB cmp1
MOVWLZX (AX), AX
ORL $0x20200000, AX
JMP final
cmp1:
CMPQ CX, $0x00
JE done
MOVBLZX (AX), AX
ORL $0x20202000, AX
final:
MOVL AX, CX
LEAL 3755991008(AX), DX
NOTL CX
ANDL CX, DX
LEAL 16843009(AX), CX
ORL CX, AX
ORL DX, AX
TESTL $0x80808080, AX
done:
SETEQ ret+16(FP)
RET
init_avx:
MOVB $0x1f, DL
PINSRB $0x00, DX, X8
VPBROADCASTB X8, Y8
MOVB $0x7e, DL
PINSRB $0x00, DX, X9
VPBROADCASTB X9, Y9
cmp128:
CMPQ CX, $0x80
JB cmp64
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y1
VMOVDQU 64(AX), Y2
VMOVDQU 96(AX), Y3
VPCMPGTB Y8, Y0, Y4
VPCMPGTB Y9, Y0, Y0
VPANDN Y4, Y0, Y0
VPCMPGTB Y8, Y1, Y5
VPCMPGTB Y9, Y1, Y1
VPANDN Y5, Y1, Y1
VPCMPGTB Y8, Y2, Y6
VPCMPGTB Y9, Y2, Y2
VPANDN Y6, Y2, Y2
VPCMPGTB Y8, Y3, Y7
VPCMPGTB Y9, Y3, Y3
VPANDN Y7, Y3, Y3
VPAND Y1, Y0, Y0
VPAND Y3, Y2, Y2
VPAND Y2, Y0, Y0
ADDQ $0x80, AX
SUBQ $0x80, CX
VPMOVMSKB Y0, DX
XORL $0xffffffff, DX
JNE done
JMP cmp128
cmp64:
CMPQ CX, $0x40
JB cmp32
VMOVDQU (AX), Y0
VMOVDQU 32(AX), Y1
VPCMPGTB Y8, Y0, Y2
VPCMPGTB Y9, Y0, Y0
VPANDN Y2, Y0, Y0
VPCMPGTB Y8, Y1, Y3
VPCMPGTB Y9, Y1, Y1
VPANDN Y3, Y1, Y1
VPAND Y1, Y0, Y0
ADDQ $0x40, AX
SUBQ $0x40, CX
VPMOVMSKB Y0, DX
XORL $0xffffffff, DX
JNE done
cmp32:
CMPQ CX, $0x20
JB cmp16
VMOVDQU (AX), Y0
VPCMPGTB Y8, Y0, Y1
VPCMPGTB Y9, Y0, Y0
VPANDN Y1, Y0, Y0
ADDQ $0x20, AX
SUBQ $0x20, CX
VPMOVMSKB Y0, DX
XORL $0xffffffff, DX
JNE done
cmp16:
CMPQ CX, $0x10
JLE cmp_tail
VMOVDQU (AX), X0
VPCMPGTB X8, X0, X1
VPCMPGTB X9, X0, X0
VPANDN X1, X0, X0
ADDQ $0x10, AX
SUBQ $0x10, CX
VPMOVMSKB X0, DX
XORL $0x0000ffff, DX
JNE done
cmp_tail:
SUBQ $0x10, CX
ADDQ CX, AX
VMOVDQU (AX), X0
VPCMPGTB X8, X0, X1
VPCMPGTB X9, X0, X0
VPANDN X1, X0, X0
VPMOVMSKB X0, DX
XORL $0x0000ffff, DX
JMP done
|
