For a function with prototype long decode2(long x, long y, long z); GCC generates the following assembly code: 1 decode2: 2 subq %rdx, %rsi 3 imulq %rsi, %rdi 4 movq %rsi, %rax 5 salq $63, %rax 6 sarq $63, %rax 7 xorq %rdi, %rax 8 ret Parameters x, y, and z are passed in registers %rdi, %rsi, and %rdx. The code stores the return value in register %rax. Write C code for decode2 that will have an effect equivalent to the assembly code shown.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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For a function with prototype

long decode2(long x, long y, long z);

GCC generates the following assembly code:

1 decode2:

2 subq %rdx, %rsi

3 imulq %rsi, %rdi

4 movq %rsi, %rax

5 salq $63, %rax

6 sarq $63, %rax

7 xorq %rdi, %rax

8 ret

Parameters x, y, and z are passed in registers %rdi, %rsi, and %rdx. The code stores the return value in register %rax.

Write C code for decode2 that will have an effect equivalent to the assembly code shown.

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