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27 lines
426 B
NASM
27 lines
426 B
NASM
// 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/4/Mult.asm
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// Multiplies R0 and R1 and stores the result in R2.
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// (R0, R1, R2 refer to RAM[0], RAM[1], and RAM[2], respectively.)
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// The algorithm is based on repetitive addition.
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@R2
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M=0
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@R1
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D=M
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@END
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D;JEQ
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(STEP)
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@R2
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D=M
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@R0
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D=D+M
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@R2
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M=D
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@R1
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DM=M-1
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@STEP
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D;JGT
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@END |