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Status: Tags: Links: ) CMPT 295 - Introduction to Computer Systems

CMPT 295 Assignments

3

Q3

p. 346 3.51! • For a function with prototype long decode2(long x, long y, long z); ace generates the’tollowing assembly code: decode2: 2 subq %rdx 1 %rsi 3 imulq %rsi, %rdi 4 movq %rsi, ‘/.rax 5 salq $63, %rax 6 sarq $63, %rax 7 xorq %rdi, Y.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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Created:: 2022-02-06 23:58