1 /* Copyright (C) 1991 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
23 /* Jump to the position specified by ENV, causing the
24 setjmp call there to return VAL, or 1 if VAL is 0. */
27 DEFUN(__longjmp, (env, val), CONST jmp_buf env AND int val)
29 /* This restores the FP and SP that setjmp's caller had,
30 and puts the return address into A0 and VAL into D0. */
32 #if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
33 /* Restore the floating-point registers. */
34 asm volatile("fmovem%.x %0, fp0-fp7" :
35 /* No outputs. */ : "g" (env[0].__fpregs[0]) :
36 "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7");
40 asm volatile("move%.l %0, d0" : /* No outputs. */ :
41 "g" (val == 0 ? 1 : val) : "d0");
43 asm volatile(/* Restore the data and address registers. */
44 "movem%.l %0, d1-d7/a0-a7\n"
45 /* Return to setjmp's caller. */
47 /* No outputs. */ : "g" (env[0].__dregs[0])
48 /* We don't bother with the clobbers,
49 because this code always jumps out anyway. */
52 /* This call avoids `volatile function does return' warnings. */