Suppose the instruction stbio r3, 0(r2) is issued and r2 contains 0x00000011 (ie 10001 in binary)What do you expect to see on byte_enable[1:0]? Your answer should contain two digits and no spaces.
Question
Suppose the instruction stbio r3, 0(r2) is issued and r2 contains 0x00000011 (ie 10001 in binary)What do you expect to see on byte_enable[1:0]? Your answer should contain two digits and no spaces.
Solution
The instruction "stbio r3, 0(r2)" is a store byte instruction in assembly language. This instruction means that the byte in register r3 is to be stored at the memory address contained in register r2.
The byte_enable[1:0] signal is used to determine which byte of the 32-bit data bus is to be written to memory. Since we are dealing with a store byte instruction, only one byte is to be written to memory.
The value in r2 is 0x00000011, which is 17 in decimal and 10001 in binary. The two least significant bits of this binary number are 01. These two bits determine which byte of the 32-bit data bus is to be written to memory.
Therefore, the expected value on byte_enable[1:0] is 01.
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