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// Copyright 2022 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
// R4 = b_base
// R5 = b_len
// R6 = b_cap (unused)
// R7 = byte to find
AND $0xff, R7
MOVV R4, R6 // store base for later
ADDV R4, R5 // end
ADDV $-1, R4
PCALIGN $16
loop:
ADDV $1, R4
BEQ R4, R5, notfound
MOVBU (R4), R8
BNE R7, R8, loop
SUBV R6, R4 // remove base
RET
notfound:
MOVV $-1, R4
RET
TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32
// R4 = s_base
// R5 = s_len
// R6 = byte to find
MOVV R4, R7 // store base for later
ADDV R4, R5 // end
ADDV $-1, R4
PCALIGN $16
loop:
ADDV $1, R4
BEQ R4, R5, notfound
MOVBU (R4), R8
BNE R6, R8, loop
SUBV R7, R4 // remove base
RET
notfound:
MOVV $-1, R4
RET
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