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- /* Copyright (C) 1997,1998,2000,2003,2004,2005,2006
- 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/>. */
- /* Define the machine-dependent type `jmp_buf'. PowerPC version. */
- #ifndef _BITS_SETJMP_H
- #define _BITS_SETJMP_H 1
- #if !defined _SETJMP_H && !defined _PTHREAD_H
- # error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
- #endif
- /* The previous bits/setjmp.h had __jmp_buf defined as a structure.
- We use an array of 'long int' instead, to make writing the
- assembler easier. Naturally, user code should not depend on
- either representation. */
- /* The current powerpc 32-bit Altivec ABI specifies for SVR4 ABI and EABI
- the vrsave must be at byte 248 & v20 at byte 256. So we must pad this
- correctly on 32 bit. It also insists that vecregs are only gauranteed
- 4 byte alignment so we need to use vperm in the setjmp/longjmp routines.
- We have to version the code because members like int __mask_was_saved
- in the jmp_buf will move as jmp_buf is now larger than 248 bytes. We
- cannot keep the altivec jmp_buf backward compatible with the jmp_buf. */
- /* The alignment is not essential, i.e.the buffer can be copied to a 4 byte
- aligned buffer as per the ABI it is just added for performance reasons. */
- typedef long int __jmp_buf[64 + (12 * 4)] __attribute__ ((__aligned__ (16)));
- #endif /* bits/setjmp.h */
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