Text file src/runtime/memclr_mips64x.s

     1	// Copyright 2015 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 mips64 mips64le
     6	
     7	#include "textflag.h"
     8	
     9	// func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
    10	TEXT runtime·memclrNoHeapPointers(SB),NOSPLIT,$0-16
    11		MOVV	ptr+0(FP), R1
    12		MOVV	n+8(FP), R2
    13		ADDV	R1, R2, R4
    14	
    15		// if less than 8 bytes, do one byte at a time
    16		SGTU	$8, R2, R3
    17		BNE	R3, out
    18	
    19		// do one byte at a time until 8-aligned
    20		AND	$7, R1, R3
    21		BEQ	R3, words
    22		MOVB	R0, (R1)
    23		ADDV	$1, R1
    24		JMP	-4(PC)
    25	
    26	words:
    27		// do 8 bytes at a time if there is room
    28		ADDV	$-7, R4, R2
    29	
    30		SGTU	R2, R1, R3
    31		BEQ	R3, out
    32		MOVV	R0, (R1)
    33		ADDV	$8, R1
    34		JMP	-4(PC)
    35	
    36	out:
    37		BEQ	R1, R4, done
    38		MOVB	R0, (R1)
    39		ADDV	$1, R1
    40		JMP	-3(PC)
    41	done:
    42		RET

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