9.15.4.1 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.