/* Copyright (C) 2014-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <setjmp.h>

#include <sys/prctl.h>

#if __mips_fpr != 0 || _MIPS_SPFPSET != 16

# error This test requires -mfpxx -mno-odd-spreg

#endif

/* This test verifies that mode changes between a setjmp and longjmp do

   not corrupt the state of callee-saved registers.  */

static int mode[6] =

  {

    0,

    PR_FP_MODE_FR,

    PR_FP_MODE_FR | PR_FP_MODE_FRE,

    PR_FP_MODE_FR,

    0,

    PR_FP_MODE_FR | PR_FP_MODE_FRE

  };

static jmp_buf env;

float check1 = 2.0;

double check2 = 3.0;

static int

do_test (void)

{

  int i;

  int result = 0;

  for (i = 0 ; i < 7 ; i++)

    {

      int retval;

      register float test1 __asm ("$f20");

      register double test2 __asm ("$f22");

      /* Hide what we are doing to $f20 and $f22 from the compiler.  */

      __asm __volatile ("l.s %0,%2\n"

			"l.d %1,%3\n"

			: "=f" (test1), "=f" (test2)

			: "m" (check1), "m" (check2));

      retval = setjmp (env);

      /* Make sure the compiler knows we want to access the variables

         via the named registers again.  */

      __asm __volatile ("" : : "f" (test1), "f" (test2));

      if (test1 != check1 || test2 != check2)

	{

	  printf ("Corrupt register detected: $20 %f = %f, $22 %f = %f\n",

		  test1, check1, test2, check2);

	  result = 1;

	}

      if (retval == 0)

	{

	  if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0

	      && errno != ENOTSUP)

	    {

	      printf ("prctl PR_SET_FP_MODE failed: %m");

	      exit (1);

	    }

	  longjmp (env, 0);

	}

    }

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../../test-skeleton.c"