Y86 Data Movement Instructions Quiz

What does an immediate operand represent in Y86?

A constant value

In Y86, which type of instruction affects both read and write operations on the destination operand?

ALU instructions

What kind of operands do all 4 ALU instructions in Y86 use?

Two register operands

Which type of Y86 instructions set the 3 flags used in the architecture?

ALU instructions Signup and view all the answers

How are address expressions for memory operands structured in Y86?

(BASE + DISP) Signup and view all the answers

What happens to the flags when non-ALU instructions are executed in Y86?

They remain unaffected Signup and view all the answers

Which type of jump instruction is unconditional in Y86?

jmp Signup and view all the answers

What must be the condition of flags for a 'je' instruction to take the jump in Y86?

'ZF = 1' Signup and view all the answers

'jg' instruction in Y86 stands for:

'Jump greater' Signup and view all the answers

'rrmovq' instruction in Y86 is used for:

'Register-register move' Signup and view all the answers

What happens when a jump (or branch) is not taken in Y86?

The next instruction executed will be the one immediately after the jump instruction Signup and view all the answers

How does the stack grow in memory when new data is pushed onto it in Y86?

It grows downward; towards lower addresses Signup and view all the answers

What is the purpose of saving the calling subroutine's rbp before setting its own base/frame pointer?

To allow for restoration of the calling subroutine's base/frame pointer Signup and view all the answers

In Y86, how are parameters passed on the stack?

They are pushed onto the stack in reverse order Signup and view all the answers

What does each subroutine in Y86 receive to use as a portion of the stack?

A frame Signup and view all the answers

What is always pushed onto the stack after all parameters when calling a subroutine?

The return address Signup and view all the answers

What do labels represent in Y86?

Strings that mark addresses in memory Signup and view all the answers

What are two things that the call instruction in Y86 accomplishes?

Pushes parameters onto the stack and jumps to a target location Signup and view all the answers

What do the pushq and popq instructions do in Y86?

Push data onto and pop data off the stack, respectively Signup and view all the answers

What two things does the ret instruction do in Y86?

Restores the caller's base pointer and returns control to caller Signup and view all the answers