In message <Pine.HPX.4.10.10103081551290.9166-100000 at gra-ux1.iram.es> you wrote: > > Actually, the gcc code generation of PPC lacks in this area. There are > very few differences between -O2 -Os (first one is the standard for speed > although you might want to try -O3). -Os is in theory the space > optimization, but there are very few places in the rs6000/ppc description > that depend on whether the code should be optimized for space or not. > There will be some difference, but relatively very small.
Just tested on our PPCBoot firmware: text data bss dec hex filename ==> size 80628 22096 10476 113200 1ba30 ppcboot-Os 100% 86332 22096 10476 118904 1d078 ppcboot-O2 105% 90464 22328 10476 123268 1e184 ppcboot-O3 109% Differences are small, but they exist (and they can make the difference if the code fits in a 128k boot ROM or not). Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de Hindsight is an exact science. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
