26 lines
919 B
NASM
26 lines
919 B
NASM
// 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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@2 // Load RAM[2] address into A register
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M=0 // Set RAM[2] to 0
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(LOOPCOND)
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@0 // Load RAM[0] address into A register
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D=M // Set D register to RAM[0]
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@LOOP
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D;JGT // If D > 0 goto LOOP
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@END
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0;JMP // When D > 0 goto end
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(LOOP)
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@1 // Load RAM[1] address into A register
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D=M // Set D register to RAM[1]
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@2 // Load RAM[2] address into A register
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M=D+M // Add content of D register to RAM[2] and store result in RAM[2]
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@0 // Load RAM[0] address into A register
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MD=M-1 // Subtract one from RAM[0] storing the results in RAM[0] and the D register
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@LOOPCOND
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D;JGT // If D > 0 goto LOOP
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(END)
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@END
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0;JMP
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