clean up FP exception code in sys_float.c

This performs a number of cleanups in the FP exception code:

- inline the body of unmask_fpe_conditional() in its only caller,
  then delete the duplicated and identical definitions of it

- start the big processor-specific block with a comment describing
  the two functions that must be defined, then delete redundant
  comments at all the mask_*() functions

- add a comment before fpe_sig_action() explaining exactly what
  processor-specific action is required of it

- flatten #ifdef nesting in fpe_sig_action()

- move common code in the x86 unmask_fpe() and erts_restore_fpu()
  function into a subroutine

- minor tweaks: drop a redundant L suffix on a 0, add a comment
  after an #else, bump the size of a debug buffer,

There should be no change in behaviour from these changes.

0 files changed, 0 insertions, 0 deletions