8 3.58 For a function with prototype long decode2 (long x, long y, long z); GCC generates the following assembly code: 1 decode2: 2 subq imulq 3 4 5 6 7 Homework Problems movq salq sarq xorq ret %rdx, %rsi %rsi, %rdi %rsi, %rax $63, %rax $63, %rax %rdi, %rax 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.

8 3.58 For a function with prototype long decode2 (long x, long y, long z); GCC generates the following assembly code: 1 decode2: 2 subq imulq 3 4 5 6 7 Homework Problems movq salq sarq xorq ret %rdx, %rsi %rsi, %rdi %rsi, %rax $63, %rax $63, %rax %rdi, %rax 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

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Parallel processing

The process of running two or more processors together is known as parallel processing. In parallel processing, a single process is divided into multiple parts, and each individual part is executed at the same time. It is used to handle various parts of a task at the same time. The main advantage of parallel processing is the reduction of the processing time of the program, where the processor in a system is the CPU. Hence, parallel processing can be performed by using multiple CPUs, and having more than one CPU creates a multi-processor. Another name of parallel processors is block processors. Here, the size of a block is the number of inputs that can be processed simultaneously in a single clock cycle.

Question

long decode2 (long x, long y, long z);
GCC generates the following assembly code:
1 decode2:
2
subq
imulq
movq
salq
5
6
7
Homework Problems
3.58
For a function with prototype
8
sarq
xorq
ret
%rdx, %rsi
%rsi, %rdi
%rsi, %rax
$63, %rax
$63, %rax
%rdi, %rax
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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