diff options
Diffstat (limited to 'src/synth/synth-ieee-numeric_std.adb')
| -rw-r--r-- | src/synth/synth-ieee-numeric_std.adb | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/src/synth/synth-ieee-numeric_std.adb b/src/synth/synth-ieee-numeric_std.adb index 89f428580..5101734ad 100644 --- a/src/synth/synth-ieee-numeric_std.adb +++ b/src/synth/synth-ieee-numeric_std.adb @@ -20,10 +20,9 @@ with Types_Utils; use Types_Utils; with Synth.Errors; use Synth.Errors; +with Synth.Ieee.Std_Logic_1164; use Synth.Ieee.Std_Logic_1164; package body Synth.Ieee.Numeric_Std is - Null_Vec : constant Std_Logic_Vector (1 .. 0) := (others => '0'); - subtype Sl_01 is Std_Ulogic range '0' .. '1'; subtype Sl_X01 is Std_Ulogic range 'X' .. '1'; @@ -466,32 +465,33 @@ package body Synth.Ieee.Numeric_Std is return Mul_Sgn_Sgn (L, Rv, Loc); end Mul_Sgn_Int; - function Neg_Sgn (V : Std_Logic_Vector) return Std_Logic_Vector + function Neg_Vec (V : Memtyp; Loc : Syn_Src) return Memtyp is - pragma Assert (V'First = 1); - Len : constant Integer := V'Last; - subtype Res_Type is Std_Logic_Vector (1 .. Len); - Res : Res_Type; + Len : constant Uns32 := V.Typ.Vbound.Len; + Res : Memtyp; Vb, Carry : Sl_X01; begin - if Len < 1 then - return Null_Vec; + Res.Typ := Create_Res_Type (V.Typ, Len); + Res := Create_Memory (Res.Typ); + + if Len = 0 then + return Res; end if; + Carry := '1'; - for I in 0 .. Len - 1 loop - Vb := Sl_To_X01 (V (V'Last - I)); + for I in 1 .. Len loop + Vb := Sl_To_X01 (Read_Std_Logic (V.Mem, Len - I)); if Vb = 'X' then - --assert NO_WARNING - -- report "NUMERIC_STD.""+"": non logical value detected" - -- severity warning; - Res := (others => 'X'); + Warning_Msg_Synth + (+Loc, "NUMERIC_STD.""-"": non logical value detected"); + Fill (Res, 'X'); exit; end if; Vb := Not_Table (Vb); - Res (Res'Last - I) := Xor_Table (Carry, Vb); + Write_Std_Logic (Res.Mem, Len - I, Xor_Table (Carry, Vb)); Carry := And_Table (Carry, Vb); end loop; return Res; - end Neg_Sgn; + end Neg_Vec; end Synth.Ieee.Numeric_Std; |