target-mips/msa_helper.c

   1 /*
   2  * MIPS SIMD Architecture Module Instruction emulation helpers for QEMU.
   3  *
   4  * Copyright (c) 2014 Imagination Technologies
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "exec/helper-proto.h"
  22
  23 /* Data format min and max values */
  24 #define DF_BITS(df) (1 << ((df) + 3))
  25
  26 #define DF_MAX_INT(df)  (int64_t)((1LL << (DF_BITS(df) - 1)) - 1)
  27 #define M_MAX_INT(m)    (int64_t)((1LL << ((m)         - 1)) - 1)
  28
  29 #define DF_MIN_INT(df)  (int64_t)(-(1LL << (DF_BITS(df) - 1)))
  30 #define M_MIN_INT(m)    (int64_t)(-(1LL << ((m)         - 1)))
  31
  32 #define DF_MAX_UINT(df) (uint64_t)(-1ULL >> (64 - DF_BITS(df)))
  33 #define M_MAX_UINT(m)   (uint64_t)(-1ULL >> (64 - (m)))
  34
  35 #define UNSIGNED(x, df) ((x) & DF_MAX_UINT(df))
  36 #define SIGNED(x, df)                                                   \
  37     ((((int64_t)x) << (64 - DF_BITS(df))) >> (64 - DF_BITS(df)))
  38
  39 /* Element-by-element access macros */
  40 #define DF_ELEMENTS(df) (MSA_WRLEN / DF_BITS(df))
  41
  42 static inline void msa_move_v(wr_t *pwd, wr_t *pws)
  43 {
  44     uint32_t i;
  45
  46     for (i = 0; i < DF_ELEMENTS(DF_DOUBLE); i++) {
  47         pwd->d[i] = pws->d[i];
  48     }
  49 }