On 9/17/20 11:55 AM, Stefan Hajnoczi wrote: > On Wed, Sep 16, 2020 at 10:40:02PM +0200, Philippe Mathieu-Daudé wrote: >> To avoid multiple endianess conversion, as we know the device >> registers are in little-endian, directly use const_le32() with >> constant values. > > Can cpu_to_X() be extended to handle constant expressions? That way the > programmer doesn't need to remember the const_X() API exists. > > Maybe __builtin_constant_p() can be used: > https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fconstant_005fp
Yes it works! Good idea :)
