We seem to have three versions of various softfloat millicode routines like __floatsitf which converts int32_t to long double:
- libgcc, e.g. external/gpl3/gcc/dist/libgcc/soft-fp/floatsitf.c - libc, e.g. lib/libc/arch/softfloat/qp.c - compiler-rt, e.g. sys/external/bsd/compiler_rt/dist/lib/builtins/floatsitf.c It turns out that libc's __floatsitf -- and probably others -- is broken on aarch64: it seems to get the two halves of float128 reversed. This has the confusing side effect that code using long double and __floatsitf in an executable works fine but code in a shared library -- exactly the same code! -- gets nonsense results. I would like to fix this. But I'm not sure how to proceed. What should we do? - What should we do? - Why do we have multiple versions of these routines? - Which ones should we keep and which ones should we discard? - Should we keep them all and just fix aarch64's code in libc? - What relies on the symbols provided by each context and what would break if we removed some of them?
