Help with this Computer architecture problem? 1) Given 16-bit instructions, as d

Question

Help with this Computer architecture problem?

1) Given 16-bit instructions, as described in the practice problems, it was possible to use expanding opcodes to allow the following to be encoded when we had a total of 32 registers How many bits the instruction length should be to allow addressing of 64 registers? Show your encoding Setl: 60 instructions with 2 register operands Set2: 30 instructions with 1 register operand Set3: 3 instructions with one 10-bit address Set4: 26 instructions with zero operands

Explanation / Answer

60 instructions with 2 register operands

000000 xxxxx xxxxx 111011 xxxxx xxxxx 111100 escape code

30 instructions with 1 register operand

11111100000 xxxxx 11111111101 xxxxx 11111111110 escape code

3 instructions with one 10 bit address

111100 xxxxxxxxxx 111110 xxxxxxxxxx 111111 escape code

26 instructions with zero operands

1111111111000000 1111111111011001  

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