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Consider the following assembly: movq myvar, %rcx subq $8, %rcx jle other addq rcx, %rax other: movq %rax, %rcx Using myvar like this is valid assembly. It means:

Consider the following assembly: movq myvar, %rcx subq $8, %rcx jle other addq rcx, %rax other: movq %rax, %rcx Using myvar like this is valid assembly. It means:

Database System Concepts
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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Consider the following assembly: E jle other other: movq myvar, %rcx subq $8, %rcx addq %rcx, %rax movq %rax, %rcx Using myvar like this is valid assembly. It means: A. we defined it earlier as something like myvar = %rcx and using it here is the same as saying movq %rcx, %rcx B. we defined it earlier as something like myvar = %rcx and using it here is the same as saying movq (the value rcx had when we defined myvar), %rcx C. myvar is a label with an address like 1234 and using it here is the same as saying movq 1234, %rcx D. myvar is a label with an address like 1234 and using it here is the same as saying movq $1234, %rcx
Transcribed Image Text:Consider the following assembly: E jle other other: movq myvar, %rcx subq $8, %rcx addq %rcx, %rax movq %rax, %rcx Using myvar like this is valid assembly. It means: A. we defined it earlier as something like myvar = %rcx and using it here is the same as saying movq %rcx, %rcx B. we defined it earlier as something like myvar = %rcx and using it here is the same as saying movq (the value rcx had when we defined myvar), %rcx C. myvar is a label with an address like 1234 and using it here is the same as saying movq 1234, %rcx D. myvar is a label with an address like 1234 and using it here is the same as saying movq $1234, %rcx
Expert Solution
Step 1

Assembly language:

Assembly language is a low level programming language.

It is used to tell directly the computer what to do.

But the computer doesn't understand the assembly language.

So the assembler is used to convert assembly language into machine code.

steps

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