nptl/sysdeps/unix/sysv/linux/sh/lowlevel-atomic.h

   1 /* Copyright (C) 2003, 2004, 2008 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifdef __ASSEMBLER__
  20
  21 #define _IMP1 #1
  22 #define _IMM1 #-1
  23 #define _IMM4 #-4
  24 #define _IMM6 #-6
  25 #define _IMM8 #-8
  26
  27 #define INC(mem, reg) \
  28         .align  2; \
  29         mova    99f, r0; \
  30         mov     r15, r1; \
  31         mov     _IMM6, r15; \
  32 98:     mov.l   mem, reg; \
  33         add     _IMP1, reg; \
  34         mov.l   reg, mem; \
  35 99:     mov     r1, r15
  36
  37 #define DEC(mem, reg) \
  38         .align  2; \
  39         mova    99f, r0; \
  40         mov     r15, r1; \
  41         mov     _IMM6, r15; \
  42 98:     mov.l   mem, reg; \
  43         add     _IMM1, reg; \
  44         mov.l   reg, mem; \
  45 99:     mov     r1, r15
  46
  47 #define XADD(reg, mem, old, tmp) \
  48         .align  2; \
  49         mova    99f, r0; \
  50         nop; \
  51         mov     r15, r1; \
  52         mov     _IMM8, r15; \
  53 98:     mov.l   mem, old; \
  54         mov     reg, tmp; \
  55         add     old, tmp; \
  56         mov.l   tmp, mem; \
  57 99:     mov     r1, r15
  58
  59 #define XCHG(reg, mem, old) \
  60         .align  2; \
  61         mova    99f, r0; \
  62         nop; \
  63         mov     r15, r1; \
  64         mov     _IMM4, r15; \
  65 98:     mov.l   mem, old; \
  66         mov.l   reg, mem; \
  67 99:     mov     r1, r15
  68
  69 #define CMPXCHG(reg, mem, new, old) \
  70         .align  2; \
  71         mova    99f, r0; \
  72         nop; \
  73         mov     r15, r1; \
  74         mov     _IMM8, r15; \
  75 98:     mov.l   mem, old; \
  76         cmp/eq  old, reg; \
  77         bf      99f; \
  78         mov.l   new, mem; \
  79 99:     mov     r1, r15
  80
  81 #endif  /* __ASSEMBLER__ */