diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/synth/netlists-disp_vhdl.adb | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/synth/netlists-disp_vhdl.adb b/src/synth/netlists-disp_vhdl.adb index 763a08f29..c063c7425 100644 --- a/src/synth/netlists-disp_vhdl.adb +++ b/src/synth/netlists-disp_vhdl.adb @@ -902,11 +902,19 @@ package body Netlists.Disp_Vhdl is Disp_X_Lit (Get_Width (Get_Output (Inst, 0))); Put_Line (" when others;"); when Id_Add => - Disp_Template (" \o0 <= std_logic_vector (\ui0 + \ui1);" & NL, - Inst); + if Get_Width (Get_Output (Inst, 0)) = 1 then + Disp_Template (" \o0 <= \i0 xor \i1; -- add" & NL, Inst); + else + Disp_Template (" \o0 <= std_logic_vector (\ui0 + \ui1);" & NL, + Inst); + end if; when Id_Sub => - Disp_Template (" \o0 <= std_logic_vector (\ui0 - \ui1);" & NL, - Inst); + if Get_Width (Get_Output (Inst, 0)) = 1 then + Disp_Template (" \o0 <= \i0 xor \i1; -- sub" & NL, Inst); + else + Disp_Template (" \o0 <= std_logic_vector (\ui0 - \ui1);" & NL, + Inst); + end if; when Id_Umul => Disp_Template (" \o0 <= std_logic_vector (resize (\ui0 * \ui1, \n0));" & NL, |