Chapter 15. D10V Dependent Features

15.1. D10V Options

The Mitsubishi D10V version of as has a few machine dependent options.

-O

The D10V can often execute two sub-instructions in parallel. When this option is used, as will attempt to optimize its output by detecting when instructions can be executed in parallel.

-nowarnswap

To optimize execution performance, as will sometimes swap the order of instructions. Normally this generates a warning. When this option is used, no warning will be generated when instructions are swapped.

-gstabs-packing, -no-gstabs-packing

as packs adjacent short instructions into a single packed instruction. -no-gstabs-packing turns instruction packing off if -gstabs is specified as well; -gstabs-packing (the default) turns instruction packing on even when -gstabs is specified.