5) Assuming you have a 4 bit version of our ALU with the same instructions and control operations, write a sequence of instructions to perform the following C code. X, Y and Z are variables in memory. Z = X & (2+~Y);

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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5) Assuming you have a 4 bit version of our ALU with the same instructions and control
operations, write a sequence of instructions to perform the following C code. X, Y and Z are
variables in memory.
Z = X & (2 + ~Y);
6)
Imagine our ALU has been increased in size to work on 3 bit inputs and outputs, but has
the same set of instructions as before. Follow the given instruction sequence to determine the
3 bit contents of each register A--C at the end of the code. If you know the bit is a 1 or 0, write
a 1 or 0 respectively. If you know the bit is the middle bit of the original value of A, write A₁ for
that bit (as opposed to A₂ or Ao). Eg. if the only instruction was ROLA, C would contain A₁A₁A₂.
SWAP
ROLA
A
← C
SWAP
A
←
AND
110₂
Final values:
A
B
C
Transcribed Image Text:5) Assuming you have a 4 bit version of our ALU with the same instructions and control operations, write a sequence of instructions to perform the following C code. X, Y and Z are variables in memory. Z = X & (2 + ~Y); 6) Imagine our ALU has been increased in size to work on 3 bit inputs and outputs, but has the same set of instructions as before. Follow the given instruction sequence to determine the 3 bit contents of each register A--C at the end of the code. If you know the bit is a 1 or 0, write a 1 or 0 respectively. If you know the bit is the middle bit of the original value of A, write A₁ for that bit (as opposed to A₂ or Ao). Eg. if the only instruction was ROLA, C would contain A₁A₁A₂. SWAP ROLA A ← C SWAP A ← AND 110₂ Final values: A B C
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