// Copyright 2018 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.

//go:build mips || mipsle

#include "go_asm.h"

#include "textflag.h"

TEXT ·IndexByte(SB),NOSPLIT,$0-20

MOVW b_base+0(FP), R1

MOVW b_len+4(FP), R2

MOVBU c+12(FP), R3 // byte to find

ADDU $1, R1, R4 // store base+1 for later

ADDU R1, R2 // end

loop:

BEQ R1, R2, notfound

MOVBU (R1), R5

ADDU $1, R1

BNE R3, R5, loop

SUBU R4, R1 // R1 will be one beyond the position we want so remove (base+1)

MOVW R1, ret+16(FP)

RET

notfound:

MOVW $-1, R1

MOVW R1, ret+16(FP)

RET

TEXT ·IndexByteString(SB),NOSPLIT,$0-16

MOVW s_base+0(FP), R1

MOVW s_len+4(FP), R2

MOVBU c+8(FP), R3 // byte to find

ADDU $1, R1, R4 // store base+1 for later

ADDU R1, R2 // end

loop:

BEQ R1, R2, notfound

MOVBU (R1), R5

ADDU $1, R1

BNE R3, R5, loop

SUBU R4, R1 // remove (base+1)

MOVW R1, ret+12(FP)

RET

notfound:

MOVW $-1, R1

MOVW R1, ret+12(FP)

RET