Actually I was thinking about mentioning it in the commit message also, but I wasn't able to find any specification for that (if all compilers use it).
Other problem is the __tune_i386__ is also set when -mtune=i386 (but with -march=i686). But if the general idea of changing the code for 486 is OK it can be added also. Petr Dne 26. 11. 23 v 13:37 Samuel Tardieu napsal(a): > > Petr Cvek <petrcve...@gmail.com> writes: > >> GCC defines __i386__ for i386 and i486, which both lack RDTSC instruction. >> The i386 seems to be impossible to distinguish, but i486 can be identified >> by checking for undefined __i486__. > > Couldn't you check for an undefined __tune_i386__, which would be set by both > GCC and LLVM when using -march=i386. > > Sam
