Architectures and Processors forum two’s complement

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two’s complement

thewal over 7 years ago

How to load the two’s complement representation of -1 into Register 3 using one instruction?

i am working on ARM7 and NXP processor.

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daith over 7 years ago +1 verified

If you use MOV the assembler will try various tricks to see if it can be done using shifting or using MVN MOV r3, #-1 the assembler will turn this into MVN r3, #0 which you can also write. See...

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0 Ryan Thomas over 7 years ago

Hi thewal,

I have moved your question to the Processors community as they may be best placed to answer your question.

Thanks

Ryan
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0 Ryan Thomas over 7 years ago

Hi thewal,

I have moved your question to the Processors community as they may be best placed to answer your question.

Thanks

Ryan
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0 thewal over 7 years ago in reply to Ryan Thomas

thanks i am new here !
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