www.delorie.com/gnu/docs/binutils/as_285.html   search  
 
Buy GNU books!


Using as

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

8.14.3 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 section .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).


[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003