On Fri, Dec 06, 2002 at 05:45:58PM +0100, Thiemo Seufer wrote: > > If we want to preserve the setup cleanly, we > > probably need yet another ABI model in gcc (especially in the face of the > > coming changes to get rid of assembly macros), with sign-extended 32-bit > > pointers for accessing program segments and 64-bit ones for the remaining > > addresses. > > Do you think this is worth the hassle? N64 offers better flexibility in > the large memory case at some performance cost, and it's conceptionally > cleaner. Absolutely: [ralf@dea linux-sgi-2.4]$ mips64-linux-size vmlinux text data bss dec hex filename 1978296 317344 156224 2451864 256998 vmlinux [ralf@dea linux-sgi-2.4]$ mips64-linux-size vmlinux text data bss dec hex filename 1761168 317344 156224 2234736 221970 vmlinux The first kernel was built as 64-bit ELF using 64-bit pointer and everything 64-bit. The second kernel was built using the -Wa,-32 trick. That's over 12% of bloat for full 64-bitiness which brings zero gain. Ralf
