Current File : //usr/local/go/src/internal/bytealg/indexbyte_riscv64.s
// 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(SB),NOSPLIT,$0-40
MOV b_base+0(FP), A1
MOV b_len+8(FP), A2
MOVBU c+24(FP), A3 // byte to find
MOV A1, A4 // store base for later
ADD A1, A2 // end
ADD $-1, A1
loop:
ADD $1, A1
BEQ A1, A2, notfound
MOVBU (A1), A5
BNE A3, A5, loop
SUB A4, A1 // remove base
MOV A1, ret+32(FP)
RET
notfound:
MOV $-1, A1
MOV A1, ret+32(FP)
RET
TEXT ·IndexByteString(SB),NOSPLIT,$0-32
MOV s_base+0(FP), A1
MOV s_len+8(FP), A2
MOVBU c+16(FP), A3 // byte to find
MOV A1, A4 // store base for later
ADD A1, A2 // end
ADD $-1, A1
loop:
ADD $1, A1
BEQ A1, A2, notfound
MOVBU (A1), A5
BNE A3, A5, loop
SUB A4, A1 // remove base
MOV A1, ret+24(FP)
RET
notfound:
MOV $-1, A1
MOV A1, ret+24(FP)
RET
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