target-tilegx/simd_helper.c

   1 /*
   2  * QEMU TILE-Gx helpers
   3  *
   4  *  Copyright (c) 2015 Chen Gang
   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 2.1 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
  18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19  */
  20
  21 #include "cpu.h"
  22 #include "qemu-common.h"
  23 #include "exec/helper-proto.h"
  24
  25
  26 uint64_t helper_v1shl(uint64_t a, uint64_t b)
  27 {
  28     uint64_t m;
  29
  30     b &= 7;
  31     m = 0x0101010101010101ULL * (0xff >> b);
  32     return (a & m) << b;
  33 }
  34
  35 uint64_t helper_v1shru(uint64_t a, uint64_t b)
  36 {
  37     uint64_t m;
  38
  39     b &= 7;
  40     m = 0x0101010101010101ULL * ((0xff << b) & 0xff);
  41     return (a & m) >> b;
  42 }
  43
  44 uint64_t helper_v1shrs(uint64_t a, uint64_t b)
  45 {
  46     uint64_t r = 0;
  47     int i;
  48
  49     b &= 7;
  50     for (i = 0; i < 64; i += 8) {
  51         int64_t ae = (int8_t)(a >> i);
  52         r |= ((ae >> b) & 0xff) << i;
  53     }
  54     return r;
  55 }