27 lines
776 B
NASM
27 lines
776 B
NASM
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// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/06/max/Max.asm
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// Computes R2 = max(R0, R1) (R0,R1,R2 refer to RAM[0],RAM[1],RAM[2])
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@R0
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D=M // D = first number
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@R1
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D=D-M // D = first number - second number
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@OUTPUT_FIRST
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D;JGT // if D>0 (first is greater) goto output_first
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@R1
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D=M // D = second number
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@OUTPUT_D
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0;JMP // goto output_d
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(OUTPUT_FIRST)
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@R0
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D=M // D = first number
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(OUTPUT_D)
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@R2
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M=D // M[2] = D (greatest number)
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(INFINITE_LOOP)
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@INFINITE_LOOP
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0;JMP // infinite loop
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