https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97887
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> --- > > This should have the following insn constraint: > > > > "TARGET_80387 && !(SSE_FLOAT_MODE_P (<MODE>mode) && TARGET_SSE_MATH)" > > > > to hide it from combine in cases where relevant SSE mode is available. > > Hmm, it is > > ;; Changing of sign for FP values is doable using integer unit too. > (define_insn "*<code><mode>2_i387_1" > [(set (match_operand:X87MODEF 0 "register_operand" "=f,!r") > (absneg:X87MODEF > (match_operand:X87MODEF 1 "register_operand" "0,0"))) > (clobber (reg:CC FLAGS_REG))] > "TARGET_80387" > "#") > > that is not guarded in this way? Yes, this is the one.
