assembly - SHR and SAR Commands -


i make sure understanding concept 100% , if not clarification.

in asm program, if perform shr 00110000b end 00011000b. however, if perform shr on 11111111b end incorrect answer , should use sar instead? because number signed?

if perform shr 00110000b end 00011000b

if shifted 1 bit right, yes. can specify shift amount, it's not fixed @ 1.

however, if perform shr on 11111111b end incorrect answer

if did logical shift of 11111111b 1 bit right you'd 01111111b. whether consider incorrect or not depends entirely on you're trying achieve. if wanted preserve sign should've used sar.


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