You are given the following information. A function with prototype int mystery(int a, int b, int c, int d); is compiled into assembly code. The body of the code is as follows: leal (%rdi,%rsi,2), %eax leal (%rdx,%rdx, 2), %edx addl %edx, %eax leal (%rax,%rcx,4), %eax ret Assume a at rdi, b at rsi, c at rdx, d at rcx, and the return value at eax. Write the C code for mystery function that will have an effect equivalent to the assembly code above.

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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Please explain the thought process behind this.
You are given the following information. A function with prototype
int mystery (int a, int b, int c, int d);
is compiled into assembly code. The body of the code is as follows:
leal (%rdi,%rsi,2), %eax
leal (%rdx,%rdx,2), %edx
addl %edx, %eax
leal (%rax,%rcx,4), %eax
ret
Assume a at rdi, b at rsi, c at rdx, d at rex, and the return value at eax.
Write the C code for mystery function that will have an effect equivalent to the assembly code
above.
Transcribed Image Text:You are given the following information. A function with prototype int mystery (int a, int b, int c, int d); is compiled into assembly code. The body of the code is as follows: leal (%rdi,%rsi,2), %eax leal (%rdx,%rdx,2), %edx addl %edx, %eax leal (%rax,%rcx,4), %eax ret Assume a at rdi, b at rsi, c at rdx, d at rex, and the return value at eax. Write the C code for mystery function that will have an effect equivalent to the assembly code above.
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