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-- GHDL Run Time (GRT) - SDF parser.
-- Copyright (C) 2002 - 2014 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with Grt.Types; use Grt.Types;
package Grt.Sdf is
type Edge_Type is
(
Edge_Error,
Edge_None,
Edge_Posedge,
Edge_Negedge,
Edge_01,
Edge_10,
Edge_0z,
Edge_Z1,
Edge_1z,
Edge_Z0
);
type Timing_Generic_Kind is
(
Delay_Port,
--Delay_Interconnect,
--Delay_Device,
-- Simple condition
Delay_Iopath,
Timingcheck_Width,
Timingcheck_Period,
-- Full condition
Timingcheck_Setup,
Timingcheck_Hold,
Timingcheck_Recovery,
Timingcheck_Removal,
Timingcheck_Skew,
Timingcheck_Nochange,
Timingcheck_Setuphold
);
subtype Timing_Generic_Simple_Condition is Timing_Generic_Kind
range Delay_Iopath .. Timingcheck_Period;
subtype Timing_Generic_Full_Condition is Timing_Generic_Kind
range Timingcheck_Setup .. Timingcheck_Setuphold;
type Sdf_Version_Type is
(
Sdf_2_1,
Sdf_Version_Unknown,
Sdf_Version_Bad
);
Read_Size : constant Natural := 4096;
Buf_Size : constant Natural := Read_Size + 1024 + 1;
Invalid_Dnumber : constant Ghdl_I32 := -1;
type Port_Spec_Type is record
-- Port identifier.
Name : String (1 .. 128);
Name_Len : Natural;
-- Left and Right range.
-- If L = R = Invalid_Dnumber, this is a simple scalar port.
-- If R = Invalid_Dnumber, this is a scalar port (from a vector)
-- Otherwise, this is a bus port.
L, R : Ghdl_I32;
-- Cond : String (1 .. 1024);
-- Cond_Len : Natural;
Edge : Edge_Type;
end record;
type Port_Spec_Array_Type is array (Natural range <>) of Port_Spec_Type;
type Ghdl_I64_Array is array (1 .. 12) of Ghdl_I64;
type Boolean_Array is array (1 .. 12) of Boolean;
type Sdf_Context_Type is record
-- Version of the SDF file.
Version : Sdf_Version_Type;
-- Timescale; 1 corresponds to 1 ps.
-- Default is 1000 (1 ns).
Timescale : Natural;
Kind : Timing_Generic_Kind;
-- Cell type.
Celltype : String (1 .. 128);
Celltype_Len : Natural;
-- Current port.
Port_Num : Natural;
Ports : Port_Spec_Array_Type (1 .. 2);
-- timing spec.
Timing : Ghdl_I64_Array;
Timing_Set : Boolean_Array;
Timing_Nbr : Natural;
end record;
-- Which value is extracted.
type Mtm_Type is (Minimum, Typical, Maximum);
Sdf_Mtm : Mtm_Type := Typical;
function Parse_Sdf_File (Filename : String) return Boolean;
end Grt.Sdf;
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