/* -*- mesa-c++  -*-
 *
 * Copyright (c) 2022 Collabora LTD
 *
 * Author: Gert Wollny <gert.wollny@collabora.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef LDSINSTR_H
#define LDSINSTR_H

#include "sfn_instr_alu.h"
#include "sfn_valuefactory.h"

namespace r600 {

class LDSReadInstr : public Instr {
public:
   LDSReadInstr(std::vector<PRegister, Allocator<PRegister>>& value,
                AluInstr::SrcValues& address);

   unsigned num_values() const { return m_dest_value.size();}
   auto address(unsigned i) const { return m_address[i];}
   auto dest(unsigned i) const { return m_dest_value[i];}

   auto address(unsigned i){ return m_address[i];}
   auto dest(unsigned i)  { return m_dest_value[i];}

   void accept(ConstInstrVisitor& visitor) const override;
   void accept(InstrVisitor& visitor) override;

   AluInstr *split(std::vector<AluInstr *>& out_block, AluInstr *last_lds_instr);
   bool is_equal_to(const LDSReadInstr& lhs) const;

   static auto from_string(std::istream& is, ValueFactory& value_factory) -> Pointer;

   bool remove_unused_components();

private:

   bool do_ready() const override;

   void do_print(std::ostream& os) const override;

   AluInstr::SrcValues m_address;
   std::vector<PRegister, Allocator<PRegister>> m_dest_value;
};

class LDSAtomicInstr : public Instr {
public:
   using SrcValues = AluInstr::SrcValues;

   LDSAtomicInstr(ESDOp op, PRegister dest, PVirtualValue address, const SrcValues& src);

   auto address() const { return m_address;}
   auto dest() const { return m_dest;}
   auto src0() const { return m_srcs[0];}
   auto src1() const { return m_srcs.size() > 1 ? m_srcs[1] : nullptr;}

   PVirtualValue address() { return m_address;}
   PRegister dest()  { return m_dest;}
   PVirtualValue src0() { return m_srcs[0];}
   PVirtualValue src1() { return m_srcs.size() > 1 ? m_srcs[1] : nullptr;}

   unsigned op() const {return m_opcode;}

   void accept(ConstInstrVisitor& visitor) const override;
   void accept(InstrVisitor& visitor) override;

   AluInstr *split(std::vector<AluInstr *>& out_block, AluInstr *last_lds_instr);
   bool is_equal_to(const LDSAtomicInstr& lhs) const;

   static auto from_string(std::istream& is, ValueFactory& value_factory) -> Pointer;
   bool replace_source(PRegister old_src, PVirtualValue new_src) override;

private:
   bool do_ready() const override;
   void do_print(std::ostream& os) const override;

   ESDOp m_opcode;
   PVirtualValue m_address{nullptr};
   PRegister m_dest{nullptr};
   SrcValues m_srcs;
};

}

#endif // LDSINSTR_H