github.com/sandwichdev/go-internals@v0.0.0-20210605002614-12311ac6b2c5/bytealg/indexbyte_mipsx.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  // +build mips mipsle
     6  
     7  #include "go_asm.h"
     8  #include "textflag.h"
     9  
    10  TEXT ·IndexByte(SB),NOSPLIT,$0-20
    11  	MOVW	b_base+0(FP), R1
    12  	MOVW	b_len+4(FP), R2
    13  	MOVBU	c+12(FP), R3	// byte to find
    14  	ADDU	$1, R1, R4	// store base+1 for later
    15  	ADDU	R1, R2	// end
    16  
    17  loop:
    18  	BEQ	R1, R2, notfound
    19  	MOVBU	(R1), R5
    20  	ADDU	$1, R1
    21  	BNE	R3, R5, loop
    22  
    23  	SUBU	R4, R1	// R1 will be one beyond the position we want so remove (base+1)
    24  	MOVW	R1, ret+16(FP)
    25  	RET
    26  
    27  notfound:
    28  	MOVW	$-1, R1
    29  	MOVW	R1, ret+16(FP)
    30  	RET
    31  
    32  TEXT ·IndexByteString(SB),NOSPLIT,$0-16
    33  	MOVW	s_base+0(FP), R1
    34  	MOVW	s_len+4(FP), R2
    35  	MOVBU	c+8(FP), R3	// byte to find
    36  	ADDU	$1, R1, R4	// store base+1 for later
    37  	ADDU	R1, R2	// end
    38  
    39  loop:
    40  	BEQ	R1, R2, notfound
    41  	MOVBU	(R1), R5
    42  	ADDU	$1, R1
    43  	BNE	R3, R5, loop
    44  
    45  	SUBU	R4, R1	// remove (base+1)
    46  	MOVW	R1, ret+12(FP)
    47  	RET
    48  
    49  notfound:
    50  	MOVW	$-1, R1
    51  	MOVW	R1, ret+12(FP)
    52  	RET