// #################################################################################################
// # << NEORV32: neorv32_cfu.c - CPU Core - CFU Co-Processor Hardware Driver >>                    #
// # ********************************************************************************************* #
// # BSD 3-Clause License                                                                          #
// #                                                                                               #
// # Copyright (c) 2023, Stephan Nolting. All rights reserved.                                     #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32              (c) Stephan Nolting #
// #################################################################################################


/**********************************************************************//**
 * @file neorv32_cpu_cfu.c
 * @brief CPU Core custom functions unit HW driver source file.
 **************************************************************************/

#include "neorv32.h"
#include "neorv32_cpu_cfu.h"


/**********************************************************************//**
 * Check if custom functions unit was synthesized.
 *
 * @return 0 if CFU was not synthesized, 1 if CFU is available.
 **************************************************************************/
int neorv32_cpu_cfu_available(void) {

  // this is an ISA extension - not a SoC module
  if (neorv32_cpu_csr_read(CSR_MXISA) & (1 << CSR_MXISA_ZXCFU)) {
    return 1;
  }
  else {
    return 0;
  }
}