github.com/SandwichDev/go-internals@v0.0.0-20210605002614-12311ac6b2c5/bytealg/indexbyte_386.s (about)

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "go_asm.h"
     6  #include "textflag.h"
     7  
     8  TEXT ·IndexByte(SB),NOSPLIT,$0-20
     9  	MOVL	b_base+0(FP), SI
    10  	MOVL	b_len+4(FP), CX
    11  	MOVB	c+12(FP), AL
    12  	MOVL	SI, DI
    13  	CLD; REPN; SCASB
    14  	JZ 3(PC)
    15  	MOVL	$-1, ret+16(FP)
    16  	RET
    17  	SUBL	SI, DI
    18  	SUBL	$1, DI
    19  	MOVL	DI, ret+16(FP)
    20  	RET
    21  
    22  TEXT ·IndexByteString(SB),NOSPLIT,$0-16
    23  	MOVL	s_base+0(FP), SI
    24  	MOVL	s_len+4(FP), CX
    25  	MOVB	c+8(FP), AL
    26  	MOVL	SI, DI
    27  	CLD; REPN; SCASB
    28  	JZ 3(PC)
    29  	MOVL	$-1, ret+12(FP)
    30  	RET
    31  	SUBL	SI, DI
    32  	SUBL	$1, DI
    33  	MOVL	DI, ret+12(FP)
    34  	RET