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:
C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter8: Arrays And Strings
Section: Chapter Questions
Problem 24PE
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8f8149c8-eddc-413d-9cd1-3019171cd65e%2Ff23fa532-fd17-4cd2-af81-7c5b57167050%2Fjnd2ix_processed.png&w=3840&q=75)
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
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