https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85048
--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #7)
> Yes, Looks like the pattern name is misdefined.
> it shoud be fixuns_trunc, but we have ufix_trunc.
No, we have the right name but generate extra instructions for uns.
8012(define_expand "fixuns_trunc<mode><sseintvecmodelower>2"
8013 [(match_operand:<sseintvecmode> 0 "register_operand")
8014 (match_operand:VF1 1 "register_operand")]
8015 "TARGET_SSE2"
8016{
8017 if (<MODE>mode == V16SFmode)
8018 emit_insn (gen_ufix_truncv16sfv16si2 (operands[0],
8019 operands[1]));
8020 else
8021 {
8022 rtx tmp[3];
8023 tmp[0] = ix86_expand_adjust_ufix_to_sfix_si (operands[1], &tmp[2]);
8024 tmp[1] = gen_reg_rtx (<sseintvecmode>mode);
8025 emit_insn (gen_fix_trunc<mode><sseintvecmodelower>2 (tmp[1],
tmp[0]));
8026 emit_insn (gen_xor<sseintvecmodelower>3 (operands[0], tmp[1],
tmp[2]));
8027 }
8028 DONE;
