CPSC 2310 - DAY 13
SEPTEMBER 28, 2016

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Masking
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ANDing a bit with 0 produces a 0 at the output.

OR a bit with 1 produces a 1 at the output, while or with 0 produces a 0

XOR

shift left (same as multiplying by 2)
shift right(same as dividing by 2)

asr - sign bit replicated on left (ex if it starts negative, it ends negative)

Field extraction with a bit mask - field already in rightmost bits

bit mask - a word where bits are used to zero out or select portions of
another word

remove all other bits and work with only the low four bits

AND

((1 << m) -1) << n;  to create a mask