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| author | Tristan Gingold <tgingold@free.fr> | 2019-09-11 06:22:06 +0200 |
|---|---|---|
| committer | Tristan Gingold <tgingold@free.fr> | 2019-09-11 06:37:28 +0200 |
| commit | 99344d16bac958ce9abbeaa78f5efd82c7ea612a (patch) | |
| tree | c23623b9b5913b181d72575760f23ae5b09d02a1 | |
| parent | 02a18caa38f94acef649f02669ec06047ff00709 (diff) | |
| download | ghdl-99344d16bac958ce9abbeaa78f5efd82c7ea612a.tar.gz ghdl-99344d16bac958ce9abbeaa78f5efd82c7ea612a.tar.bz2 ghdl-99344d16bac958ce9abbeaa78f5efd82c7ea612a.zip | |
synth: add const_x gate.
| -rw-r--r-- | src/synth/netlists-builders.adb | 18 | ||||
| -rw-r--r-- | src/synth/netlists-builders.ads | 3 | ||||
| -rw-r--r-- | src/synth/netlists-disp_vhdl.adb | 6 | ||||
| -rw-r--r-- | src/synth/netlists-gates.ads | 1 |
4 files changed, 27 insertions, 1 deletions
diff --git a/src/synth/netlists-builders.adb b/src/synth/netlists-builders.adb index 82c69f1e4..740a0d867 100644 --- a/src/synth/netlists-builders.adb +++ b/src/synth/netlists-builders.adb @@ -168,6 +168,13 @@ package body Netlists.Builders is Set_Port_Desc (Res, Port_Desc_Array'(1 .. 0 => <>), Outputs); Res := New_User_Module + (Ctxt.Design, New_Sname_Artificial (Get_Identifier ("const_X")), + Id_Const_X, 0, 1, 0); + Ctxt.M_Const_X := Res; + Outputs := (0 => Create_Output ("o")); + Set_Port_Desc (Res, Port_Desc_Array'(1 .. 0 => <>), Outputs); + + Res := New_User_Module (Ctxt.Design, New_Sname_Artificial (Get_Identifier ("const_bit")), Id_Const_Bit, 0, 1, 0); Ctxt.M_Const_Bit := Res; @@ -560,6 +567,17 @@ package body Netlists.Builders is return O; end Build_Compare; + function Build_Const_X (Ctxt : Context_Acc; W : Width) return Net + is + Inst : Instance; + O : Net; + begin + Inst := New_Internal_Instance (Ctxt, Ctxt.M_Const_X); + O := Get_Output (Inst, 0); + Set_Width (O, W); + return O; + end Build_Const_X; + function Build_Const_Z (Ctxt : Context_Acc; W : Width) return Net is pragma Assert (W > 0); diff --git a/src/synth/netlists-builders.ads b/src/synth/netlists-builders.ads index ac98e12a3..aeeaaa53d 100644 --- a/src/synth/netlists-builders.ads +++ b/src/synth/netlists-builders.ads @@ -49,6 +49,8 @@ package Netlists.Builders is Id : Reduce_Module_Id; Op : Net) return Net; + function Build_Const_X (Ctxt : Context_Acc; + W : Width) return Net; function Build_Const_Z (Ctxt : Context_Acc; W : Width) return Net; @@ -165,6 +167,7 @@ private M_Const_UB32 : Module; M_Const_SB32 : Module; M_Const_UL32 : Module; + M_Const_X : Module; M_Const_Z : Module; M_Const_Bit : Module; M_Const_Log : Module; diff --git a/src/synth/netlists-disp_vhdl.adb b/src/synth/netlists-disp_vhdl.adb index 6685d71ae..ee9bf13f0 100644 --- a/src/synth/netlists-disp_vhdl.adb +++ b/src/synth/netlists-disp_vhdl.adb @@ -499,6 +499,9 @@ package body Netlists.Disp_Vhdl is when Id_Const_Z => Disp_Template ("(\n0 downto 0 => 'Z')", Inst, (0 => Get_Width (O) - 1)); + when Id_Const_X => + Disp_Template ("(\n0 downto 0 => 'X')", + Inst, (0 => Get_Width (O) - 1)); when Id_Const_Bit => Disp_Const_Bit (Inst); when Id_Const_Log => @@ -605,7 +608,8 @@ package body Netlists.Disp_Vhdl is end; when Id_Const_UB32 | Id_Const_UL32 - | Id_Const_Z => + | Id_Const_Z + | Id_Const_X => Disp_Template (" \o0 <= ", Inst); Disp_Constant_Inline (Inst); Put_Line (";"); diff --git a/src/synth/netlists-gates.ads b/src/synth/netlists-gates.ads index 162ef0a6f..72b29266f 100644 --- a/src/synth/netlists-gates.ads +++ b/src/synth/netlists-gates.ads @@ -144,6 +144,7 @@ package Netlists.Gates is Id_Const_UL32 : constant Module_Id := 70; Id_Const_UB64 : constant Module_Id := 66; Id_Const_UL64 : constant Module_Id := 67; + Id_Const_X : constant Module_Id := 71; Id_Const_Z : constant Module_Id := 72; Id_Const_0 : constant Module_Id := 73; |