2. [20 points] When introducing RISC-V instructions, we have seen several required formats that do not...

Transcribed Image Text:

2. [20 points] When introducing RISC-V instructions, we have seen several required formats that do not seem to follow a straightforward or convenient design. For example: (a) All arithmetic operations must have 3 operands, which makes the addition of n numbers requiring n-1 instructions. (b) The S-type RISC-V instruction format has the 12-bit immediate field split into two fields, which makes the format hard to read and understand For each of the two cases above, can you please explain, using you own words, why it is designed that way in RISC-V? 3. [40 points] Assuming variable i is in register x6, the base address of array A in memory is in register x23, and variable s is in register x18. (a) Please convert the following C code to RISC-V assembly code. Please write clear comments (using "/") to make your code easier to understand. for (i =0; i <= 1999; i = i + 1) A[i] = A[i] + s; (b) Now the C code is updated to the following, which would produce the same results as in (1): for (i = 0; i <- 1998; i - i + 2){ A[1] =A[1] +s; A[i+1] = A[i+1] + s; } Please convert this version of the loop to RISC-V assembly code (with clear comments using ") and discuss about the pros s and cons compared to the version in (a). When discussing about the pros and cons, please consider both the performance and the size of the program and conduct the analysis/comparison in a quantitative manner. 2. [20 points] When introducing RISC-V instructions, we have seen several required formats that do not seem to follow a straightforward or convenient design. For example: (a) All arithmetic operations must have 3 operands, which makes the addition of n numbers requiring n-1 instructions. (b) The S-type RISC-V instruction format has the 12-bit immediate field split into two fields, which makes the format hard to read and understand For each of the two cases above, can you please explain, using you own words, why it is designed that way in RISC-V? 3. [40 points] Assuming variable i is in register x6, the base address of array A in memory is in register x23, and variable s is in register x18. (a) Please convert the following C code to RISC-V assembly code. Please write clear comments (using "/") to make your code easier to understand. for (i =0; i <= 1999; i = i + 1) A[i] = A[i] + s; (b) Now the C code is updated to the following, which would produce the same results as in (1): for (i = 0; i <- 1998; i - i + 2){ A[1] =A[1] +s; A[i+1] = A[i+1] + s; } Please convert this version of the loop to RISC-V assembly code (with clear comments using ") and discuss about the pros s and cons compared to the version in (a). When discussing about the pros and cons, please consider both the performance and the size of the program and conduct the analysis/comparison in a quantitative manner.

Answer rating: 100% (QA)

The image youve provided contains a multipart question related to RISCV assembly language programming Ill provide you with explanations and the requir... View the full answer