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/* Copyright (C) 1997, 1998, 2000, 2003, 2004 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* 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. */
#include <bits/wordsize.h>
#if defined __USE_MISC || defined _ASM
# define JB_GPR1 0 /* Also known as the stack pointer */
# define JB_GPR2 1
# define JB_LR 2 /* The address we will return to */
# if __WORDSIZE == 64
# define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18*2 words total. */
# define JB_CR 21 /* Condition code registers with the VRSAVE at */
/* offset 172 (low half of the double word. */
# define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */
# define JB_SIZE (64 * 8) /* As per PPC64-VMX ABI. */
# define JB_VRSAVE 21 /* VRSAVE shares a double word with the CR at offset */
/* 168 (high half of the double word). */
# define JB_VRS 40 /* VRs 20 through 31 are saved, 12*4 words total. */
# else
# define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total. */
# define JB_CR 21 /* Condition code registers. */
# define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */
# define JB_SIZE ((64 + (12 * 4)) * 4)
# define JB_VRSAVE 62
# define JB_VRS 64
# endif
#endif
/* 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. */
#ifndef _ASM
# if __WORDSIZE == 64
typedef long int __jmp_buf[64] __attribute__ ((__aligned__ (16)));
# else
/* 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
#endif
/* Test if longjmp to JMPBUF would unwind the frame
containing a local variable at ADDRESS. */
#define _JMPBUF_UNWINDS(jmpbuf, address) \
((void *) (address) < (void *) (jmpbuf)[JB_GPR1])
#endif /* bits/setjmp.h */
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