Subversion Repositories riscv_vhdl

/**

 * @file

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

 * @author     Sergey Khabarov - sergeykhbr@gmail.com

 * @brief      Instruction object declaration.

 */

#ifndef __DEBUGGER_CPU_RISCV_INSTRUCTIONS_H__

#define __DEBUGGER_CPU_RISCV_INSTRUCTIONS_H__

#include <inttypes.h>

#include "iface.h"

#include "attribute.h"

#include "iinstr.h"

namespace debugger {

class IsaProcessor : public IInstruction {

public:

    IsaProcessor(const char *name, const char *bits) {

        name_ = name;

        mask_ = 0;

        opcode_ = 0;

        for (int i = 0; i < 32; i++) {

            switch (bits[i]) {

            case '0':

                break;

            case '1':

                opcode_ |= (1 << (31 - i));

                break;

            case '?':

                mask_ |= (1 << (31 - i));

                break;

            default:;

            }

        }

        mask_ ^= ~0;

    }

    // IInstruction interface:

    virtual const char *name() { return name_; }

    virtual bool parse(uint32_t *payload) {

        return ((payload[0] & mask_) == opcode_);

    }

    virtual void exec(uint32_t *payload, CpuContextType *regs) =0;

    virtual uint32_t hash() {

        return (opcode_ >> 2) & 0x1F;

    }

protected:

    const char *name_;

    uint32_t mask_;

    uint32_t opcode_;

};

unsigned addSupportedInstruction(IsaProcessor *instr, AttributeType *out);

}  // namespace debugger

#endif  // __DEBUGGER_CPU_RISCV_INSTRUCTIONS_H__