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b8a8413c6f
2001-03-16 Martin Schwidefsky <schwidefsky@de.ibm.com> * sysdeps/s390/s390-64/bits/huge_val.h: Move to... * sysdeps/s390/bits/huge_val.h: ...here. * sysdeps/s390/s390-32/bit/huge_val.h: Remove. * sysdeps/s390/s390-64/ffs.c: Move to... * sysdeps/s390/ffs.c: ...here. * sysdeps/s390/s390-32/ffs.c: Remove.
103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
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S390 version.
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Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef PT_EI
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# define PT_EI extern inline
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#endif
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/* Spinlock implementation; required. */
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PT_EI long int
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testandset (int *spinlock)
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{
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int ret;
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__asm__ __volatile__(
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" la 1,%1\n"
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" lhi 0,1\n"
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" l %0,%1\n"
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"0: cs %0,0,0(1)\n"
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" jl 0b"
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: "=&d" (ret), "+m" (*spinlock)
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: : "0", "1", "cc");
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return ret;
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}
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/* Get some notion of the current stack. Need not be exactly the top
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of the stack, just something somewhere in the current frame. */
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#define CURRENT_STACK_FRAME stack_pointer
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register char * stack_pointer __asm__ ("15");
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/* Return the thread descriptor for the current thread.
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S/390 registers uses access register 0 as "thread register". */
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#define THREAD_SELF ({ \
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register pthread_descr __self; \
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__asm__ ("ear %0,%%a0" : "=d" (__self) ); \
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__self; \
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})
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/* Initialize the thread-unique value. */
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#define INIT_THREAD_SELF(descr, nr) ({ \
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__asm__ ("sar %%a0,%0" : : "d" (descr) ); \
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})
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/* Access to data in the thread descriptor is easy. */
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#define THREAD_GETMEM(descr, member) THREAD_SELF->member
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#define THREAD_GETMEM_NC(descr, member) THREAD_SELF->member
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#define THREAD_SETMEM(descr, member, value) THREAD_SELF->member = (value)
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#define THREAD_SETMEM_NC(descr, member, value) THREAD_SELF->member = (value)
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/* We want the OS to assign stack addresses. */
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#define FLOATING_STACKS 1
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/* Maximum size of the stack if the rlimit is unlimited. */
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#define ARCH_STACK_MAX_SIZE 8*1024*1024
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/* Compare-and-swap for semaphores. */
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#define HAS_COMPARE_AND_SWAP
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PT_EI int
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__compare_and_swap(long int *p, long int oldval, long int newval)
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{
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int retval;
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__asm__ __volatile__(
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" la 1,%1\n"
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" lr 0,%2\n"
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" cs 0,%3,0(1)\n"
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" ipm %0\n"
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" srl %0,28\n"
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"0:"
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: "=&d" (retval), "+m" (*p)
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: "d" (oldval) , "d" (newval)
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: "cc", "0", "1" );
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return retval == 0;
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}
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/* Get some notion of the current stack. Need not be exactly the top
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of the stack, just something somewhere in the current frame. */
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#define CURRENT_STACK_FRAME stack_pointer
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register char * stack_pointer __asm__ ("%r15");
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