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
|
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "go_asm.h"
#include "textflag.h"
TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT,$0-40
#ifndef GOEXPERIMENT_regabiargs
MOV b_base+0(FP), X10
MOV b_len+8(FP), X11
MOVBU c+24(FP), X13 // byte to find
#endif
// X10 = b_base
// X11 = b_len
// X12 = b_cap (unused)
// X13 = byte to find
AND $0xff, X13
MOV X10, X12 // store base for later
ADD X10, X11 // end
ADD $-1, X10
loop:
ADD $1, X10
BEQ X10, X11, notfound
MOVBU (X10), X14
BNE X13, X14, loop
SUB X12, X10 // remove base
#ifndef GOEXPERIMENT_regabiargs
MOV X10, ret+32(FP)
#endif
RET
notfound:
MOV $-1, X10
#ifndef GOEXPERIMENT_regabiargs
MOV X10, ret+32(FP)
#endif
RET
TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32
#ifndef GOEXPERIMENT_regabiargs
MOV s_base+0(FP), X10
MOV s_len+8(FP), X11
MOVBU c+16(FP), X12 // byte to find
#endif
// X10 = b_base
// X11 = b_len
// X12 = byte to find
AND $0xff, X12
MOV X10, X13 // store base for later
ADD X10, X11 // end
ADD $-1, X10
loop:
ADD $1, X10
BEQ X10, X11, notfound
MOVBU (X10), X14
BNE X12, X14, loop
SUB X13, X10 // remove base
#ifndef GOEXPERIMENT_regabiargs
MOV X10, ret+24(FP)
#endif
RET
notfound:
MOV $-1, X10
#ifndef GOEXPERIMENT_regabiargs
MOV X10, ret+24(FP)
#endif
RET
|
