1 /* Copyright (C) 1997,1998,2000,2003,2004,2005,2006
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 /* Define the machine-dependent type `jmp_buf'. PowerPC version. */
20 #ifndef _BITS_SETJMP_H
21 #define _BITS_SETJMP_H 1
23 #if !defined _SETJMP_H && !defined _PTHREAD_H
24 # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
27 /* The previous bits/setjmp.h had __jmp_buf defined as a structure.
28 We use an array of 'long int' instead, to make writing the
29 assembler easier. Naturally, user code should not depend on
30 either representation. */
32 #include <bits/wordsize.h>
34 /* The current powerpc 32-bit Altivec ABI specifies for SVR4 ABI and EABI
35 the vrsave must be at byte 248 & v20 at byte 256. So we must pad this
36 correctly on 32 bit. It also insists that vecregs are only gauranteed
37 4 byte alignment so we need to use vperm in the setjmp/longjmp routines.
38 We have to version the code because members like int __mask_was_saved
39 in the jmp_buf will move as jmp_buf is now larger than 248 bytes. We
40 cannot keep the altivec jmp_buf backward compatible with the jmp_buf. */
43 typedef long int __jmp_buf
[64] __attribute__ ((__aligned__ (16)));
45 /* The alignment is not essential, i.e.the buffer can be copied to a 4 byte
46 aligned buffer as per the ABI it is just added for performance reasons. */
47 typedef long int __jmp_buf
[64 + (12 * 4)] __attribute__ ((__aligned__ (16)));
51 #endif /* bits/setjmp.h */