mirror of
https://github.com/golang/go
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153 lines
1.7 KiB
ArmAsm
153 lines
1.7 KiB
ArmAsm
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// Copyright 2018 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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#include "textflag.h"
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// void runtime·memmove(void*, void*, uintptr)
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TEXT runtime·memmove(SB), NOSPLIT, $0-24
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MOVD to+0(FP), R0
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MOVD from+8(FP), R1
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MOVD n+16(FP), R2
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Get R0
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Get R1
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I64LtU
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If // forward
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exit_forward_64:
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Block
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loop_forward_64:
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Loop
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Get R2
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I64Const $8
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I64LtU
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BrIf exit_forward_64
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MOVD 0(R1), 0(R0)
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Get R0
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I64Const $8
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I64Add
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Set R0
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Get R1
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I64Const $8
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I64Add
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Set R1
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Get R2
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I64Const $8
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I64Sub
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Set R2
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Br loop_forward_64
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End
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End
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loop_forward_8:
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Loop
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Get R2
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I64Eqz
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If
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RET
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End
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Get R0
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I32WrapI64
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I64Load8U (R1)
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I64Store8 $0
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Get R0
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I64Const $1
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I64Add
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Set R0
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Get R1
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I64Const $1
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I64Add
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Set R1
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Get R2
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I64Const $1
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I64Sub
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Set R2
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Br loop_forward_8
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End
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Else
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// backward
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Get R0
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Get R2
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I64Add
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Set R0
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Get R1
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Get R2
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I64Add
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Set R1
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exit_backward_64:
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Block
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loop_backward_64:
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Loop
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Get R2
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I64Const $8
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I64LtU
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BrIf exit_backward_64
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Get R0
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I64Const $8
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I64Sub
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Set R0
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Get R1
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I64Const $8
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I64Sub
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Set R1
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Get R2
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I64Const $8
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I64Sub
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Set R2
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MOVD 0(R1), 0(R0)
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Br loop_backward_64
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End
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End
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loop_backward_8:
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Loop
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Get R2
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I64Eqz
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If
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RET
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End
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Get R0
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I64Const $1
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I64Sub
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Set R0
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Get R1
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I64Const $1
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I64Sub
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Set R1
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Get R2
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I64Const $1
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I64Sub
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Set R2
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Get R0
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I32WrapI64
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I64Load8U (R1)
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I64Store8 $0
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Br loop_backward_8
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End
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End
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UNDEF
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