--  SPDX-License-Identifier: Apache-2.0
--
--  Copyright (c) 2022 onox <denkpadje@gmail.com>
--
--  Licensed under the Apache License, Version 2.0 (the "License");
--  you may not use this file except in compliance with the License.
--  You may obtain a copy of the License at
--
--      http://www.apache.org/licenses/LICENSE-2.0
--
--  Unless required by applicable law or agreed to in writing, software
--  distributed under the License is distributed on an "AS IS" BASIS,
--  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
--  See the License for the specific language governing permissions and
--  limitations under the License.

with Ada.Unchecked_Conversion;

with Orka.SIMD.AVX.Integers.Swizzle;
with Orka.SIMD.SSE2.Integers;
with Orka.SIMD.SSE2.Longs.Arithmetic;

package body Orka.SIMD.AVX.Longs.Arithmetic.Emulation is

   use SIMD.AVX.Integers;
   use SIMD.AVX.Integers.Swizzle;
   use SIMD.SSE2.Integers;
   use SIMD.SSE2.Longs;
   use SIMD.SSE2.Longs.Arithmetic;

   function Convert is new Ada.Unchecked_Conversion (m256i, m256l);
   function Convert is new Ada.Unchecked_Conversion (m256l, m256i);

   function Convert is new Ada.Unchecked_Conversion (m128i, m128l);
   function Convert is new Ada.Unchecked_Conversion (m128l, m128i);

   function "+" (Left, Right : m256l) return m256l is
      Left_Low  : constant m128l := Convert (Extract (Convert (Left), 0));
      Left_High : constant m128l := Convert (Extract (Convert (Left), 1));

      Right_Low  : constant m128l := Convert (Extract (Convert (Right), 0));
      Right_High : constant m128l := Convert (Extract (Convert (Right), 1));
   begin
      return Convert (Pack
        (High => Convert (Left_High + Right_High),
         Low  => Convert (Left_Low + Right_Low)));
   end "+";

   function "-" (Left, Right : m256l) return m256l is
      Left_Low  : constant m128l := Convert (Extract (Convert (Left), 0));
      Left_High : constant m128l := Convert (Extract (Convert (Left), 1));

      Right_Low  : constant m128l := Convert (Extract (Convert (Right), 0));
      Right_High : constant m128l := Convert (Extract (Convert (Right), 1));
   begin
      return Convert (Pack
        (High => Convert (Left_High - Right_High),
         Low  => Convert (Left_Low - Right_Low)));
   end "-";

end Orka.SIMD.AVX.Longs.Arithmetic.Emulation;