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-- Values in synthesis.
-- Copyright (C) 2017 Tristan Gingold
--
-- This file is part of GHDL.
--
-- 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>.
with System;
with Ada.Unchecked_Conversion;
with Types; use Types;
with Grt.Types; use Grt.Types;
package Elab.Memtype is
type Memory_Element is mod 2**8;
type Memory_Array is array (Size_Type range <>) of Memory_Element;
-- Thin pointer for a generic pointer.
type Memory_Ptr is access all Memory_Array (Size_Type);
pragma No_Strict_Aliasing (Memory_Ptr);
-- For conversions use Address to avoid compiler warnings about alignment.
function To_Address is new Ada.Unchecked_Conversion
(Memory_Ptr, System.Address);
function To_Memory_Ptr is new Ada.Unchecked_Conversion
(System.Address, Memory_Ptr);
Ptr_Size : constant Size_Type := Standard'Address_Size / 8;
-- Low-level functions.
function "+" (Base : Memory_Ptr; Off : Size_Type) return Memory_Ptr;
function "-" (Base : Memory_Ptr; Off : Size_Type) return Memory_Ptr;
procedure Write_U8 (Mem : Memory_Ptr; Val : Ghdl_U8);
function Read_U8 (Mem : Memory_Ptr) return Ghdl_U8;
function Read_Char (Mem : Memory_Ptr) return Character;
procedure Write_U32 (Mem : Memory_Ptr; Val : Ghdl_U32);
function Read_U32 (Mem : Memory_Ptr) return Ghdl_U32;
procedure Write_I32 (Mem : Memory_Ptr; Val : Ghdl_I32);
function Read_I32 (Mem : Memory_Ptr) return Ghdl_I32;
procedure Write_I64 (Mem : Memory_Ptr; Val : Ghdl_I64);
function Read_I64 (Mem : Memory_Ptr) return Ghdl_I64;
procedure Write_Fp64 (Mem : Memory_Ptr; Val : Fp64);
function Read_Fp64 (Mem : Memory_Ptr) return Fp64;
procedure Write_Ptr (Mem : Memory_Ptr; Val : Memory_Ptr);
function Read_Ptr (Mem : Memory_Ptr) return Memory_Ptr;
end Elab.Memtype;
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