On Wed, Dec 04 2024 at 11:30, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@xxxxxxxx> > > Both 32-bit and 64-bit builds allow optimizing using "-march=atom", but > this is somewhat suboptimal, as gcc and clang use this option to refer > to the original in-order "Bonnell" microarchitecture used in the early > "Diamondville" and "Silverthorne" processors that were mostly 32-bit only. > > The later 22nm "Silvermont" architecture saw a significant redesign to > an out-of-order architecture that is reflected in the -mtune=silvermont > flag in the compilers, and all of these are 64-bit capable. In theory. There are quite some crippled variants of silvermont which are 32-bit only (either fused or at least officially not-supported to run 64-bit)...
