target-ppc/internal.h

   1 /*
   2  *  PowerPC interal definitions for qemu.
   3  *
   4  * This 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 of the License, or (at your option) any later version.
   8  *
   9  * This 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 this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef PPC_INTERNAL_H
  19 #define PPC_INTERNAL_H
  20
  21 #define FUNC_MASK(name, ret_type, size, max_val)                  \
  22 static inline ret_type name(uint##size##_t start,                 \
  23                               uint##size##_t end)                 \
  24 {                                                                 \
  25     ret_type ret, max_bit = size - 1;                             \
  26                                                                   \
  27     if (likely(start == 0)) {                                     \
  28         ret = max_val << (max_bit - end);                         \
  29     } else if (likely(end == max_bit)) {                          \
  30         ret = max_val >> start;                                   \
  31     } else {                                                      \
  32         ret = (((uint##size##_t)(-1ULL)) >> (start)) ^            \
  33             (((uint##size##_t)(-1ULL) >> (end)) >> 1);            \
  34         if (unlikely(start > end)) {                              \
  35             return ~ret;                                          \
  36         }                                                         \
  37     }                                                             \
  38                                                                   \
  39     return ret;                                                   \
  40 }
  41
  42 #if defined(TARGET_PPC64)
  43 FUNC_MASK(MASK, target_ulong, 64, UINT64_MAX);
  44 #else
  45 FUNC_MASK(MASK, target_ulong, 32, UINT32_MAX);
  46 #endif
  47 FUNC_MASK(mask_u32, uint32_t, 32, UINT32_MAX);
  48 FUNC_MASK(mask_u64, uint64_t, 64, UINT64_MAX);
  49
  50 #endif /* PPC_INTERNAL_H */