9.17.4.1 callj

You can write callj to have the assembler or the linker determine the most appropriate form of subroutine call: ‘call’, ‘bal’, or ‘calls’. If the assembly source contains enough information—a ‘.leafproc’ or ‘.sysproc’ directive defining the operand—then as translates the callj; if not, it simply emits the callj, leaving it for the linker to resolve.