github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/internal/bytealg/equal_loong64.s (about)

     1  // Copyright 2022 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  #define	REGCTXT	R29
     9  
    10  // memequal(a, b unsafe.Pointer, size uintptr) bool
    11  TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25
    12  	MOVV	a+0(FP), R4
    13  	MOVV	b+8(FP), R5
    14  	BEQ	R4, R5, eq
    15  	MOVV	size+16(FP), R6
    16  	ADDV	R4, R6, R7
    17  	PCALIGN	$16
    18  loop:
    19  	BNE	R4, R7, test
    20  	MOVV	$1, R4
    21  	MOVB	R4, ret+24(FP)
    22  	RET
    23  test:
    24  	MOVBU	(R4), R9
    25  	ADDV	$1, R4
    26  	MOVBU	(R5), R10
    27  	ADDV	$1, R5
    28  	BEQ	R9, R10, loop
    29  
    30  	MOVB	R0, ret+24(FP)
    31  	RET
    32  eq:
    33  	MOVV	$1, R4
    34  	MOVB	R4, ret+24(FP)
    35  	RET
    36  
    37  // memequal_varlen(a, b unsafe.Pointer) bool
    38  TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17
    39  	MOVV	a+0(FP), R4
    40  	MOVV	b+8(FP), R5
    41  	BEQ	R4, R5, eq
    42  	MOVV	8(REGCTXT), R6    // compiler stores size at offset 8 in the closure
    43  	MOVV	R4, 8(R3)
    44  	MOVV	R5, 16(R3)
    45  	MOVV	R6, 24(R3)
    46  	JAL	runtime·memequal(SB)
    47  	MOVBU	32(R3), R4
    48  	MOVB	R4, ret+16(FP)
    49  	RET
    50  eq:
    51  	MOVV	$1, R4
    52  	MOVB	R4, ret+16(FP)
    53  	RET