// Copyright 2020 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 ·CountString<ABIInternal>(SB),NOSPLIT,$0-32

// X10 = s_base

// X11 = s_len

// X12 = byte to count

MOV X12, X13

JMP ·Count<ABIInternal>(SB)

TEXT ·Count<ABIInternal>(SB),NOSPLIT,$0-40

// X10 = b_base

// X11 = b_len

// X12 = b_cap (unused)

// X13 = byte to count (want in X12)

AND $0xff, X13, X12

MOV ZERO, X14 // count

ADD X10, X11 // end

PCALIGN $16

loop:

BEQ X10, X11, done

MOVBU (X10), X15

ADD $1, X10

BNE X12, X15, loop

ADD $1, X14

JMP loop

done:

MOV X14, X10

RET