1// Copyright 2020 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5#include "go_asm.h"
6#include "textflag.h"
7
8TEXT ·Count<ABIInternal>(SB),NOSPLIT,$0-40
9 // X10 = b_base
10 // X11 = b_len
11 // X12 = b_cap (unused)
12 // X13 = byte to count (want in X12)
13 AND $0xff, X13, X12
14 MOV ZERO, X14 // count
15 ADD X10, X11 // end
16
17 PCALIGN $16
18loop:
19 BEQ X10, X11, done
20 MOVBU (X10), X15
21 ADD $1, X10
22 BNE X12, X15, loop
23 ADD $1, X14
24 JMP loop
25
26done:
27 MOV X14, X10
28 RET
29
30TEXT ·CountString<ABIInternal>(SB),NOSPLIT,$0-32
31 // X10 = s_base
32 // X11 = s_len
33 // X12 = byte to count
34 AND $0xff, X12
35 MOV ZERO, X14 // count
36 ADD X10, X11 // end
37
38 PCALIGN $16
39loop:
40 BEQ X10, X11, done
41 MOVBU (X10), X15
42 ADD $1, X10
43 BNE X12, X15, loop
44 ADD $1, X14
45 JMP loop
46
47done:
48 MOV X14, X10
49 RET
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