9.17.3 i960 Machine Directives

.bss symbol, length, align

Reserve length bytes in the bss section for a local symbol, aligned to the power of two specified by align. length and align must be positive absolute expressions. This directive differs from `.lcomm' only in that it permits you to specify an alignment. See .lcomm.

.extended flonums

.extended expects zero or more flonums, separated by commas; for each flonum, `.extended' emits an ieee extended-format (80-bit) floating-point number.

.leafproc call-lab, bal-lab

You can use the `.leafproc' directive in conjunction with the optimized callj instruction to enable faster calls of leaf procedures. If a procedure is known to call no other procedures, you may define an entry point that skips procedure prolog code (and that does not depend on system-supplied saved context), and declare it as the bal-lab using `.leafproc'. If the procedure also has an entry point that goes through the normal prolog, you can specify that entry point as call-lab.

A `.leafproc' declaration is meant for use in conjunction with the optimized call instruction `callj'; the directive records the data needed later to choose between converting the `callj' into a bal or a call.

call-lab is optional; if only one argument is present, or if the two arguments are identical, the single argument is assumed to be the bal entry point.

.sysproc name, index

The `.sysproc' directive defines a name for a system procedure. After you define it using `.sysproc', you can use name to refer to the system procedure identified by index when calling procedures with the optimized call instruction `callj'.

Both arguments are required; index must be between 0 and 31 (inclusive).