[Bug target/95921] [m68k] invalid codegen for __builtin_sqrt

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95921

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
The m68k backend generally does all floating point arithmethic in extended
precision for !TARGET_68040, setting FLT_EVAL_METHOD to 2.