HP UX Developer Tools manual Call Directive, Call argumentdescription argumentdescription

Assembler Directives and Pseudo-Operations

.CALL Directive

.CALL Directive

The .CALL directive marks the next branch statement as a procedure call, and permits you to describe the location of arguments and the function return result.

Syntax

.CALL [ argument_description[ argument_description] ...]

Parameters

	argument_
	description	Allows you to communicate to the linker the types of
		registers used to pass floating point arguments and
		receive floating point return results in the succeeding
		procedure call. Similarly, this information can be
		communicated in the .EXPORT directive.
		The linker requires this information because the
		runtime architecture allows floating point arguments
		and return values to reside in either general registers
		or floating point registers, depending on source
		language convention. At link time, the linker ensures
		that both the caller and called procedure agree on
		argument location. If not, the linker may insert code to
		relocate the arguments (or return result) before control
		is transferred to the called procedure or a procedure
		return is completed.
		You can use up to 5 argument-descriptionsin the
		.CALL directive; one for each of the four arguments
		that may be passed in registers (arg0–arg3), and one
		for a return value (ret0).
	In PA-RISC 2.0W, (64-bit mode) the Assembler ignores the .CALL
NOTE
	directive. This means that the linker does not ensure that the caller and
	called procedure agree on argument locations. If you do not know the
	prototype of the called procedure, you must pass floating point

Chapter 4 63