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// Copyright 2009 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.
TEXT ·IndexByte(SB),7,$0
MOVL s+0(FP), SI
MOVL s_len+4(FP), CX
MOVB c+12(FP), AL
MOVL SI, DI
CLD; REPN; SCASB
JZ 3(PC)
MOVL $-1, ret+16(FP)
RET
SUBL SI, DI
SUBL $1, DI
MOVL DI, ret+16(FP)
RET
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