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
|
// Code generated by command: go run keyset_asm.go -pkg keyset -out ../keyset/keyset_amd64.s -stubs ../keyset/keyset_amd64.go. DO NOT EDIT.
//go:build !purego
#include "textflag.h"
// func Lookup(keyset []byte, key []byte) int
// Requires: AVX
TEXT ·Lookup(SB), NOSPLIT, $0-56
MOVQ keyset_base+0(FP), AX
MOVQ keyset_len+8(FP), CX
SHRQ $0x04, CX
MOVQ key_base+24(FP), DX
MOVQ key_len+32(FP), BX
MOVQ key_cap+40(FP), SI
CMPQ BX, $0x10
JA not_found
CMPQ SI, $0x10
JB safe_load
load:
VMOVUPS (DX), X0
prepare:
VPXOR X2, X2, X2
VPCMPEQB X1, X1, X1
LEAQ blend_masks<>+16(SB), DX
SUBQ BX, DX
VMOVUPS (DX), X3
VPBLENDVB X3, X0, X2, X0
XORQ DX, DX
MOVQ CX, BX
SHRQ $0x02, BX
SHLQ $0x02, BX
bigloop:
CMPQ DX, BX
JE loop
VPCMPEQB (AX), X0, X8
VPTEST X1, X8
JCS done
VPCMPEQB 16(AX), X0, X9
VPTEST X1, X9
JCS found1
VPCMPEQB 32(AX), X0, X10
VPTEST X1, X10
JCS found2
VPCMPEQB 48(AX), X0, X11
VPTEST X1, X11
JCS found3
ADDQ $0x04, DX
ADDQ $0x40, AX
JMP bigloop
loop:
CMPQ DX, CX
JE done
VPCMPEQB (AX), X0, X2
VPTEST X1, X2
JCS done
INCQ DX
ADDQ $0x10, AX
JMP loop
JMP done
found3:
INCQ DX
found2:
INCQ DX
found1:
INCQ DX
done:
MOVQ DX, ret+48(FP)
RET
not_found:
MOVQ CX, ret+48(FP)
RET
safe_load:
MOVQ DX, SI
ANDQ $0x00000fff, SI
CMPQ SI, $0x00000ff0
JBE load
MOVQ $0xfffffffffffffff0, SI
ADDQ BX, SI
VMOVUPS (DX)(SI*1), X0
LEAQ shuffle_masks<>+16(SB), DX
SUBQ BX, DX
VMOVUPS (DX), X1
VPSHUFB X1, X0, X0
JMP prepare
DATA blend_masks<>+0(SB)/8, $0xffffffffffffffff
DATA blend_masks<>+8(SB)/8, $0xffffffffffffffff
DATA blend_masks<>+16(SB)/8, $0x0000000000000000
DATA blend_masks<>+24(SB)/8, $0x0000000000000000
GLOBL blend_masks<>(SB), RODATA|NOPTR, $32
DATA shuffle_masks<>+0(SB)/8, $0x0706050403020100
DATA shuffle_masks<>+8(SB)/8, $0x0f0e0d0c0b0a0908
DATA shuffle_masks<>+16(SB)/8, $0x0706050403020100
DATA shuffle_masks<>+24(SB)/8, $0x0f0e0d0c0b0a0908
GLOBL shuffle_masks<>(SB), RODATA|NOPTR, $32
|
