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https://github.com/golang/go
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424738e43e
Change-Id: I9e94027ef66c88007107de2b2b75c3d7cf1352af Reviewed-on: https://go-review.googlesource.com/14467 Reviewed-by: Minux Ma <minux@golang.org>
43 lines
751 B
ArmAsm
43 lines
751 B
ArmAsm
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build mips64 mips64le
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#include "textflag.h"
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// void runtime·memclr(void*, uintptr)
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TEXT runtime·memclr(SB),NOSPLIT,$0-16
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MOVV ptr+0(FP), R1
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MOVV n+8(FP), R2
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ADDV R1, R2, R4
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// if less than 8 bytes, do one byte at a time
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SGTU $8, R2, R3
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BNE R3, out
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// do one byte at a time until 8-aligned
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AND $7, R1, R3
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BEQ R3, words
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MOVB R0, (R1)
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ADDV $1, R1
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JMP -4(PC)
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words:
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// do 8 bytes at a time if there is room
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ADDV $-7, R4, R2
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SGTU R2, R1, R3
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BEQ R3, out
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MOVV R0, (R1)
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ADDV $8, R1
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JMP -4(PC)
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out:
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BEQ R1, R4, done
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MOVB R0, (R1)
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ADDV $1, R1
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JMP -3(PC)
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done:
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RET
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