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https://github.com/chai2010/advanced-go-programming-book.git
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58 lines
894 B
ArmAsm
Executable File
58 lines
894 B
ArmAsm
Executable File
// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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#include "textflag.h"
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// func Add2(n, m int64) int32
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TEXT ·Add2(SB), NOSPLIT, $0-24
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MOVQ n+0(FP), AX
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MOVQ m+8(FP), BX
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ADDQ AX, BX
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MOVQ BX, ret+16(FP)
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RET
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// func BSF(n int64) int
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TEXT ·BSF(SB), NOSPLIT, $0
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BSFQ n+0(FP), AX
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JEQ allZero
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MOVQ AX, ret+8(FP)
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RET
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allZero:
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MOVQ $-1, ret+8(FP)
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RET
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// func BSF32(n int32) int32
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TEXT ·BSF32(SB), NOSPLIT, $0
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BSFL n+0(FP), AX
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JEQ allZero32
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MOVL AX, ret+8(FP)
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RET
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allZero32:
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MOVL $-1, ret+8(FP)
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RET
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// func Sum2(s []int64) int64
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TEXT ·Sum2(SB), NOSPLIT, $0
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MOVQ $0, DX
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MOVQ s_base+0(FP), AX
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MOVQ s_len+8(FP), DI
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MOVQ $0, CX
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CMPQ CX, DI
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JGE Sum2End
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Sum2Loop:
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MOVQ (AX), BP
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ADDQ BP, DX
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ADDQ $8, AX
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INCQ CX
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CMPQ CX, DI
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JL Sum2Loop
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Sum2End:
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MOVQ DX, ret+24(FP)
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RET
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// vim: set ft=txt:
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