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 /* Broadcast a value to all elements of a vector.  */
  27 #define V1(X)      (((X) & 0xff) * 0x0101010101010101ull)
  28
  29
  30 uint64_t helper_v1shl(uint64_t a, uint64_t b)
  31 {
  32     uint64_t m;
  33
  34     b &= 7;
  35     m = V1(0xff >> b);
  36     return (a & m) << b;
  37 }
  38
  39 uint64_t helper_v1shru(uint64_t a, uint64_t b)
  40 {
  41     uint64_t m;
  42
  43     b &= 7;
  44     m = V1(0xff << b);
  45     return (a & m) >> b;
  46 }
  47
  48 uint64_t helper_v1shrs(uint64_t a, uint64_t b)
  49 {
  50     uint64_t r = 0;
  51     int i;
  52
  53     b &= 7;
  54     for (i = 0; i < 64; i += 8) {
  55         r = deposit64(r, i, 8, sextract64(a, i + b, 8 - b));
  56     }
  57     return r;
  58 }