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/* Machine-dependent pthreads configuration and inline functions.
 
   Copyright (C) 1996, 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ralf Baechle <ralf@gnu.org>.
   Based on the Alpha version by Richard Henderson <rth@tamu.edu>.
 
   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; see the file COPYING.LIB.  If
   not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
#ifndef _PT_MACHINE_H
#define _PT_MACHINE_H   1
 
#include <features.h>
 
/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.  */
static inline int
_test_and_set (int *p, int v) __THROW
{
  int r, t;
 
  __asm__ __volatile__
    ("/* Inline test and set */\n"
     "1:\n\t"
     ".set      push\n\t"
     ".set      mips2\n\t"
     "ll        %0,%3\n\t"
     "move      %1,%4\n\t"
     "beq       %0,%4,2f\n\t"
     "sc        %1,%2\n\t"
     ".set      pop\n\t"
     "beqz      %1,1b\n"
     "2:\n\t"
     "/* End test and set */"
     : "=&r" (r), "=&r" (t), "=m" (*p)
     : "m" (*p), "r" (v)
     : "memory");
 
  return r;
}
 
 
#ifndef PT_EI
# define PT_EI extern inline
#endif
 
extern long int testandset (int *spinlock);
extern int __compare_and_swap (long int *p, long int oldval, long int newval);
 
 
/* Spinlock implementation; required.  */
 
PT_EI long int
testandset (int *spinlock)
{
  return _test_and_set (spinlock, 1);
}
 
 
/* Get some notion of the current stack.  Need not be exactly the top
   of the stack, just something somewhere in the current frame.  */
#define CURRENT_STACK_FRAME  stack_pointer
register char * stack_pointer __asm__ ("$29");
 
 
/* Compare-and-swap for semaphores. */
 
#define HAS_COMPARE_AND_SWAP
PT_EI int
__compare_and_swap (long int *p, long int oldval, long int newval)
{
  long int ret, temp;
 
  __asm__ __volatile__
    ("/* Inline compare & swap */\n"
     "1:\n\t"
     ".set      push\n\t"
     ".set      mips2\n\t"
     "ll        %1,%5\n\t"
     "move      %0,$0\n\t"
     "bne       %1,%3,2f\n\t"
     "move      %0,%4\n\t"
     "sc        %0,%2\n\t"
     ".set      pop\n\t"
     "beqz      %0,1b\n"
     "2:\n\t"
     "/* End compare & swap */"
     : "=&r" (ret), "=&r" (temp), "=m" (*p)
     : "r" (oldval), "r" (newval), "m" (*p)
     : "memory");
 
  return ret;
}
 
#endif /* pt-machine.h */

Line No.	Rev	Author	Line
1	1325	phoenix	`/* Machine-dependent pthreads configuration and inline functions.`
2
3			`Copyright (C) 1996, 1997, 1998, 2000, 2002 Free Software Foundation, Inc.`
4			`This file is part of the GNU C Library.`
5			`Contributed by Ralf Baechle <ralf@gnu.org>.`
6			`Based on the Alpha version by Richard Henderson <rth@tamu.edu>.`
7
8			`The GNU C Library is free software; you can redistribute it and/or`
9			`modify it under the terms of the GNU Lesser General Public License as`
10			`published by the Free Software Foundation; either version 2.1 of the`
11			`License, or (at your option) any later version.`
12
13			`The GNU C Library is distributed in the hope that it will be useful,`
14			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
15			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
16			`Lesser General Public License for more details.`
17
18			`You should have received a copy of the GNU Lesser General Public`
19			`License along with the GNU C Library; see the file COPYING.LIB. If`
20			`not, write to the Free Software Foundation, Inc.,`
21			`59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */`
22
23			`#ifndef _PT_MACHINE_H`
24			`#define _PT_MACHINE_H 1`
25
26			`#include <features.h>`
27
28			`/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.`
29			`This file is part of the GNU C Library.`
30			`Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000. */`
31			`static inline int`
32			`_test_and_set (int *p, int v) __THROW`
33			`{`
34			`int r, t;`
35
36			`__asm__ __volatile__`
37			`("/* Inline test and set */\n"`
38			`"1:\n\t"`
39			`".set push\n\t"`
40			`".set mips2\n\t"`
41			`"ll %0,%3\n\t"`
42			`"move %1,%4\n\t"`
43			`"beq %0,%4,2f\n\t"`
44			`"sc %1,%2\n\t"`
45			`".set pop\n\t"`
46			`"beqz %1,1b\n"`
47			`"2:\n\t"`
48			`"/* End test and set */"`
49			`: "=&r" (r), "=&r" (t), "=m" (*p)`
50			`: "m" (*p), "r" (v)`
51			`: "memory");`
52
53			`return r;`
54			`}`
55
56
57			`#ifndef PT_EI`
58			`# define PT_EI extern inline`
59			`#endif`
60
61			`extern long int testandset (int *spinlock);`
62			`extern int __compare_and_swap (long int *p, long int oldval, long int newval);`
63
64
65			`/* Spinlock implementation; required. */`
66
67			`PT_EI long int`
68			`testandset (int *spinlock)`
69			`{`
70			`return _test_and_set (spinlock, 1);`
71			`}`
72
73
74			`/* Get some notion of the current stack. Need not be exactly the top`
75			`of the stack, just something somewhere in the current frame. */`
76			`#define CURRENT_STACK_FRAME stack_pointer`
77			`register char * stack_pointer __asm__ ("$29");`
78
79
80			`/* Compare-and-swap for semaphores. */`
81
82			`#define HAS_COMPARE_AND_SWAP`
83			`PT_EI int`
84			`__compare_and_swap (long int *p, long int oldval, long int newval)`
85			`{`
86			`long int ret, temp;`
87
88			`__asm__ __volatile__`
89			`("/* Inline compare & swap */\n"`
90			`"1:\n\t"`
91			`".set push\n\t"`
92			`".set mips2\n\t"`
93			`"ll %1,%5\n\t"`
94			`"move %0,$0\n\t"`
95			`"bne %1,%3,2f\n\t"`
96			`"move %0,%4\n\t"`
97			`"sc %0,%2\n\t"`
98			`".set pop\n\t"`
99			`"beqz %0,1b\n"`
100			`"2:\n\t"`
101			`"/* End compare & swap */"`
102			`: "=&r" (ret), "=&r" (temp), "=m" (*p)`
103			`: "r" (oldval), "r" (newval), "m" (*p)`
104			`: "memory");`
105
106			`return ret;`
107			`}`
108
109			`#endif /* pt-machine.h */`

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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libpthread/] [linuxthreads/] [sysdeps/] [mips/] [pt-machine.h] - Blame information for rev 1771