Subversion Repositories riscv_vhdl

/**

 * @file

 * @copyright  Copyright 2016 GNSS Sensor Ltd. All right reserved.

 * @author     Sergey Khabarov - sergeykhbr@gmail.com

 * @brief      Left/Right shifter arithmetic/logic 32/64 bits.

 *

 * @details    Vivado synthesizer (2016.2) doesn't support shift

 *             from dynamic value, so implement this mux.

 */

#ifndef __DEBUGGER_RIVERLIB_RSHIFT_H__

#define __DEBUGGER_RIVERLIB_RSHIFT_H__

#include <systemc.h>

#include "../../river_cfg.h"

namespace debugger {

SC_MODULE(Shifter) {

    sc_in<sc_uint<RISCV_ARCH>> i_a1;      // Operand 1

    sc_in<sc_uint<6>> i_a2;               // Shift bits number

    sc_out<sc_uint<RISCV_ARCH>> o_sll;   // Logical shift left 64-bits operand

    sc_out<sc_uint<RISCV_ARCH>> o_sllw;  // Logical shift left 32-bits operand

    sc_out<sc_uint<RISCV_ARCH>> o_srl;    // Logical shift 64 bits

    sc_out<sc_uint<RISCV_ARCH>> o_sra;    // Arith. shift 64 bits

    sc_out<sc_uint<RISCV_ARCH>> o_srlw;   // Logical shift 32 bits

    sc_out<sc_uint<RISCV_ARCH>> o_sraw;   // Arith. shift 32 bits

    void comb();

    SC_HAS_PROCESS(Shifter);

    Shifter(sc_module_name name_);

    void generateVCD(sc_trace_file *i_vcd, sc_trace_file *o_vcd);

private:

};

}  // namespace debugger

#endif  // __DEBUGGER_RIVERLIB_RSHIFT_H__