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The stack register points to the top of the stack for the currently executing thread. The stack is a fixed-length memory allocation at the bottom of addressable memory (highest available address). The stack extends upwards into lower addresses. To keep track of the stack's usage, the stack pointer marks the top of the stack where a new frame will be pushed, decrementing the stack pointer by the required amount. When a frame is popped, the stack pointer is incremented by the frame length. The stack is typically used to call and return from functions by storing the return address of the caller, but can also be used to store a function's arguments (the values passed to it by its caller), its local variables and its exception handlers. Since the memory is allocated as soon as the thread becomes active, moving a pointer to activate and release stack frames is much quicker than requesting heap memory via the operating system.
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What is the difference between register stacks and memory stacks?
Registers are normally memory spaces internal to the processor or very close to it. They are generally faster than main memory and will be small in size and will hold very frequently used data.Register stacks are a set of such register memory locations.Memory refers to computers main memory outside CPU. It is used to keep data and programs. Memory stack is a series of memory locations.The difference between register stack and memory stack is...
Which register bank shares space with the stack?
its the ram locations 00-1fh
What is the SP pointing register's default memory segment?
The default segment for SP (Stack Pointer) relative memory accesses in the 8086/8088 is SS (Stack Segment).
What function for stack pointer of the register?
A stack pointer is a register pointing to the top of a stack. It supports the fundamental stack manipulations (push and pop) in an efficient manner. Most micro processor hardware has build-in hardware support for stack pointers, typically both in form of dedicated stack pointer registers and in form of addressing modes which support the creation and maintenance of stacks through general-purpose pointer registers. In software, many programming languages feature constructs suited for implementation of stack pointers within the high-level language (such as post-increment and pre-decrement operators in C).
Which are the various 16-bit registers in Intel 8085?
The various 16-bit registers on the 8085 are BC, DE, HL, SP, PC.
Stack register are used to store?
The stack register contains the address of the last item pushed on the stack. The stack is a region of memory used for temporary storage of instruction addresses and register values in a Last-In-First-Out (nested) structure. It is used for interrupts and subroutine calls.
Which register in the 8085 processor is special purpose?
stack register is a special purpose register.
Do program compilers prioritize register use or bus use?
Buses transfer data and are therefore never used by compilers directly (they are a function of hardware). However, if you were to ask if compilers prioritize register or stack usage, this question becomes valid. In that case, a modern compiler will prefer to use a register over the stack, as registers require less time to access, and therefore can speed up a program's execution.
Size of stack memory and stack pointer register in 8051 microprocessor?
8 bit
Which register can be changed directly using pop instruction in 8086?
stack segment register
What is stack in microprocessor?
The stack is a region of memory set aside to store register values and operands.
Where do register variables get stored?
Either in registers or on the stack.
What is the 16 bit register in the 8051?
pc and stack pointer
What is the difference between register stacks and memory stacks?
Registers are normally memory spaces internal to the processor or very close to it. They are generally faster than main memory and will be small in size and will hold very frequently used data.Register stacks are a set of such register memory locations.Memory refers to computers main memory outside CPU. It is used to keep data and programs. Memory stack is a series of memory locations.The difference between register stack and memory stack is...
Which CPU register holds address for memory?
The program counter (PC) and the stack pointer (SP).
Why stack data starts from one location less then stack pointer's register address?
Actually, stack data starts one location greater than the stack pointer. In the Intel design, the stack pointer always points to the next location to be used on a push, and pushes always decrement the pointer. It is more correct to say that the stack region to be used next is one location less than the stack pointer's register address.
Which register bank shares space with the stack?
its the ram locations 00-1fh
