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

   1 /* Copyright (C) 2003-2014 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifdef __ASSEMBLER__
  19
  20 #define _IMP1 #1
  21 #define _IMM1 #-1
  22 #define _IMM4 #-4
  23 #define _IMM6 #-6
  24 #define _IMM8 #-8
  25
  26 #define INC(mem, reg) \
  27         .align  2; \
  28         mova    99f, r0; \
  29         mov     r15, r1; \
  30         mov     _IMM6, r15; \
  31 98:     mov.l   mem, reg; \
  32         add     _IMP1, reg; \
  33         mov.l   reg, mem; \
  34 99:     mov     r1, r15
  35
  36 #define DEC(mem, reg) \
  37         .align  2; \
  38         mova    99f, r0; \
  39         mov     r15, r1; \
  40         mov     _IMM6, r15; \
  41 98:     mov.l   mem, reg; \
  42         add     _IMM1, reg; \
  43         mov.l   reg, mem; \
  44 99:     mov     r1, r15
  45
  46 #define XADD(reg, mem, old, tmp) \
  47         .align  2; \
  48         mova    99f, r0; \
  49         nop; \
  50         mov     r15, r1; \
  51         mov     _IMM8, r15; \
  52 98:     mov.l   mem, old; \
  53         mov     reg, tmp; \
  54         add     old, tmp; \
  55         mov.l   tmp, mem; \
  56 99:     mov     r1, r15
  57
  58 #define XCHG(reg, mem, old) \
  59         .align  2; \
  60         mova    99f, r0; \
  61         nop; \
  62         mov     r15, r1; \
  63         mov     _IMM4, r15; \
  64 98:     mov.l   mem, old; \
  65         mov.l   reg, mem; \
  66 99:     mov     r1, r15
  67
  68 #define CMPXCHG(reg, mem, new, old) \
  69         .align  2; \
  70         mova    99f, r0; \
  71         nop; \
  72         mov     r15, r1; \
  73         mov     _IMM8, r15; \
  74 98:     mov.l   mem, old; \
  75         cmp/eq  old, reg; \
  76         bf      99f; \
  77         mov.l   new, mem; \
  78 99:     mov     r1, r15
  79
  80 #endif  /* __ASSEMBLER__ */