Encode the following ARC instructions in binary. Show the identity of the indivi

Question

Encode the following ARC instructions in binary. Show the identity of the individual bit fields and then the entire instruction word in hexadecimal notation. Assume label_d is 64 bytes ahead of the instruction in which it is referenced, and label-b is 0 Times FFFFFFFFC. Sethil 0 Times ABCD, %r 12 call label_b orcc % r15,255, %r22 Why does sethi only load the high 22 bits of a register? It would be more useful if sethil loaded all 32 bits of a register. What is the problem with having sethil load all 32 bits? A program compiled for a SPARC ISA writes the 32-bit unsigned integer 0 Times ABCDEF01 to a file, and reads it back correctly. The same program compiled for a Pentium ISA also works correctly. However, when the file is transferred between machines, the program incorrectly reads the integer from the files as 0 Times 01EFCDAB. What is going wrong?

Explanation / Answer

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Sethi instructions are encoded in four fields. The first field holds the 2-bit value 00. The next field, rd, holds the 5-bit encoding of the destination register. The third field holds the 3-bit value 100. The final filed holds the 22-bit binary encoding of the value specified in the instruction.

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