/* Copyright (C) 1992-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Brendan Kehoe (brendan@zen.org).

   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 <setjmp.h>

#include <stdlib.h>

#ifndef	__GNUC__

  #error This file uses GNU C extensions; you must compile with GCC.

#endif

static void __attribute__ ((nomips16))

____longjmp (__jmp_buf env_arg, int val_arg)

{

  /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before

     the hack around it); force it to use $a1 for the longjmp value.

     Without this it saves $a1 in a register which gets clobbered

     along the way.  */

  register struct __jmp_buf_internal_tag *env asm ("a0");

  register int val asm ("a1");

#ifdef CHECK_SP

  register long sp asm ("$29");

  CHECK_SP (env[0].__sp, sp, long);

#endif

#ifdef __mips_hard_float

  /* Pull back the floating point callee-saved registers.  */

  asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));

  asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));

  asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));

  asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));

  asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));

  asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));

#endif

  /* Get the GP. */

  asm volatile ("lw $gp, %0" : : "m" (env[0].__gp));

  /* Get the callee-saved registers.  */

  asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0]));

  asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1]));

  asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2]));

  asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3]));

  asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4]));

  asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5]));

  asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6]));

  asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7]));

  /* Get the PC.  */

  asm volatile ("lw $25, %0" : : "m" (env[0].__pc));

  /* Restore the stack pointer and the FP.  They have to be restored

     last and in a single asm as gcc, depending on options used, may

     use either of them to access env.  */

  asm volatile ("lw $29, %0\n\t"

		"lw $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));

/* Give setjmp 1 if given a 0, or what they gave us if non-zero.  */

  if (val == 0)

    asm volatile ("li $2, 1");

  else

    asm volatile ("move $2, %0" : : "r" (val));

  asm volatile ("jr $25");

  /* Avoid `volatile function does return' warnings.  */

  for (;;);

}

strong_alias (____longjmp, __longjmp);