Computer Architecture Write down the format and binary representation of Ts fiel

Question

Computer Architecture Write down the format and binary representation of Ts fields. The numbers below Fall 2017 23, s 1, rt-2, constant 14 are given indentation of the instruction described by the following in ction format: address 31302928 (4 pt) Given in following instructions 5. memory address of the data R1 = 100 R2-200 lw R1, 32(R2) Address: sw R3, 8(R4) Address: R3-300 RA-400 6. (4 pt) Sign-extend the following binary numbers from 8-bit to 16-bit. 11001100 00110011 Zero-extend the following binary numbers from&-bit to 16-bit. 1100 1100 00110011 7. (6pt) Do the following number conversions assuming two's complement representat binary numbers. a. 12010 b. -5210

Explanation / Answer

4.

op - 6 bits , rs - 5 bits ,rt - 5 bits, const - 16 bits

op=23 , rs=1, rt=2,const=14

op=010111, rs=00001, rt=00010, const=0000000000001110

so finally

0101 1100 0010 0010 0000 0000 0000 1110

5.

lw r1,32(r2)

r1 holds the data in the address (32+[r2])

so address =232

  

sw r3,8(r4)

r3 stores the data in the address (8+[r4])

so address =408

6.

sign extension of binary number:

   repeat the MSB bit 8 times to the left.

1100 1100 = 1111 1111 1100 1100

0011 0011= 0000 0000 0011 0011

  

zero extension of binary number:

   repeat the bit 0 8 times to the left.

1100 1100 = 0000 0000 1100 1100

0011 0011= 0000 0000 0011 0011

7.

two's compliment of binary numbers:

If number is positive then write binary number if negitive get ones compliment of binary equivalent and add 1 to the ressult.

120 = 0111 1000

-52 = 1100 1100

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