1. [12 points] This problem uses the RISC-V program fragment below. L1: addi x12, x0, 5...

 

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1. [12 points] This problem uses the RISC-V program fragment below. L1: addi x12, x0, 5 add x11, x0, // x11 = 0 // x19 = 0 add x19, x0, addi x20, x0, 150 bge x11, x12, Exit slli x13, x11, 3 add x14, x16, x13 ld x15, 0(x14) blt x15, x20, L2 sd x0, 0(x14) add x19, x15, x19 beq x0, x0, L3 // i8 //x16 address of array[0] L2: addi x15, x15, 1 sd x15, 0(x14) L3: addi x11, x11, 1 jal x0, L1 // i++ Exit: (a) Write code (C or Java) that performs the same function as this code. (b) Assume that array [] = {100, 150, 200, 250, 300}. What is the value of x19 at the end? (c) Assume that array[] = {100, 150, 200, 250, 300}. What is the average CPI of the code frag- ment, assuming the cycle latencies shown in the table below? format R-type CPI 1 I-type 2 S-type SB-type U-type UJ-type 4 3 1 2 (d) Rewrite the assembly code above to use pointers instead of array indexes. Your code should modify x16 to do this, and you should have no need for x14. 1. [12 points] This problem uses the RISC-V program fragment below. L1: addi x12, x0, 5 add x11, x0, // x11 = 0 // x19 = 0 add x19, x0, addi x20, x0, 150 bge x11, x12, Exit slli x13, x11, 3 add x14, x16, x13 ld x15, 0(x14) blt x15, x20, L2 sd x0, 0(x14) add x19, x15, x19 beq x0, x0, L3 // i8 //x16 address of array[0] L2: addi x15, x15, 1 sd x15, 0(x14) L3: addi x11, x11, 1 jal x0, L1 // i++ Exit: (a) Write code (C or Java) that performs the same function as this code. (b) Assume that array [] = {100, 150, 200, 250, 300}. What is the value of x19 at the end? (c) Assume that array[] = {100, 150, 200, 250, 300}. What is the average CPI of the code frag- ment, assuming the cycle latencies shown in the table below? format R-type CPI 1 I-type 2 S-type SB-type U-type UJ-type 4 3 1 2 (d) Rewrite the assembly code above to use pointers instead of array indexes. Your code should modify x16 to do this, and you should have no need for x14.

Answer rating: 100% (QA)

a Code in C that performs the same function as the RISCV program fragment c include stdio h int main ... View the full answer