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duplicate the value on top of the stack dup_x1 5a 0101 1010 value2, value1 → value1, value2, value1 insert a copy of the top value into the stack two values from the top. value1 and value2 must not be of the type double or long. dup_x2 5b 0101 1011 value3, value2, value1 → value1, value3, value2, value1
The call stack works well as a place for these parameters, especially since each call to a subroutine, which will have differing values for parameters, will be given separate space on the call stack for those values. In object-oriented languages such as C++, the list of parameters may also include the this pointer. Evaluation stack
A number of programming languages are stack-oriented, meaning they define most basic operations (adding two numbers, printing a character) as taking their arguments from the stack, and placing any return values back on the stack. For example, PostScript has a return stack and an operand stack, and also has a graphics state stack and a ...
Each frame for a method call has an "operand stack" and an array of "local variables". [5]: 2.6 [2] The operand stack is used for operands to computations and for receiving the return value of a called method, while local variables serve the same purpose as registers and are also used to pass method arguments. The maximum size of the operand ...
The stack segment contains the call stack, a LIFO structure, typically located in the higher parts of memory. A "stack pointer" register tracks the top of the stack; it is adjusted each time a value is "pushed" onto the stack. The set of values pushed for one function call is termed a "stack frame". A stack frame consists at minimum of a return ...
Where the previous value of the frame pointer is stored, which is used to restore the stack frame when the subroutine ends. Options include within the call stack, or in a specific register. Sometimes frame pointers are not used at all. [2]
Pop a value from stack into local variable indx. Base instruction 0x0A stloc.0: Pop a value from stack into local variable 0. Base instruction 0x0B stloc.1: Pop a value from stack into local variable 1. Base instruction 0x0C stloc.2: Pop a value from stack into local variable 2. Base instruction 0x0D stloc.3: Pop a value from stack into local ...
For example, in the Java virtual machine (JVM), tail-recursive calls can be eliminated (as this reuses the existing call stack), but general tail calls cannot be (as this changes the call stack). [13] [14] As a result, functional languages such as Scala that target the JVM can efficiently implement direct tail recursion, but not mutual tail ...