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 "qemu/osdep.h"
  22 #include "cpu.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 #define V2(X)      (((X) & 0xffff) * 0x0001000100010001ull)
  29
  30
  31 uint64_t helper_v1multu(uint64_t a, uint64_t b)
  32 {
  33     uint64_t r = 0;
  34     int i;
  35
  36     for (i = 0; i < 64; i += 8) {
  37         unsigned ae = extract64(a, i, 8);
  38         unsigned be = extract64(b, i, 8);
  39         r = deposit64(r, i, 8, ae * be);
  40     }
  41     return r;
  42 }
  43
  44 uint64_t helper_v2mults(uint64_t a, uint64_t b)
  45 {
  46     uint64_t r = 0;
  47     int i;
  48
  49     /* While the instruction talks about signed inputs, with a
  50        truncated result the sign of the inputs doesn't matter.  */
  51     for (i = 0; i < 64; i += 16) {
  52         unsigned ae = extract64(a, i, 16);
  53         unsigned be = extract64(b, i, 16);
  54         r = deposit64(r, i, 16, ae * be);
  55     }
  56     return r;
  57 }
  58
  59 uint64_t helper_v1shl(uint64_t a, uint64_t b)
  60 {
  61     uint64_t m;
  62
  63     b &= 7;
  64     m = V1(0xff >> b);
  65     return (a & m) << b;
  66 }
  67
  68 uint64_t helper_v2shl(uint64_t a, uint64_t b)
  69 {
  70     uint64_t m;
  71
  72     b &= 15;
  73     m = V2(0xffff >> b);
  74     return (a & m) << b;
  75 }
  76
  77 uint64_t helper_v1shru(uint64_t a, uint64_t b)
  78 {
  79     uint64_t m;
  80
  81     b &= 7;
  82     m = V1(0xff << b);
  83     return (a & m) >> b;
  84 }
  85
  86 uint64_t helper_v2shru(uint64_t a, uint64_t b)
  87 {
  88     uint64_t m;
  89
  90     b &= 15;
  91     m = V2(0xffff << b);
  92     return (a & m) >> b;
  93 }
  94
  95 uint64_t helper_v1shrs(uint64_t a, uint64_t b)
  96 {
  97     uint64_t r = 0;
  98     int i;
  99
 100     b &= 7;
 101     for (i = 0; i < 64; i += 8) {
 102         r = deposit64(r, i, 8, sextract64(a, i + b, 8 - b));
 103     }
 104     return r;
 105 }
 106
 107 uint64_t helper_v2shrs(uint64_t a, uint64_t b)
 108 {
 109     uint64_t r = 0;
 110     int i;
 111
 112     b &= 15;
 113     for (i = 0; i < 64; i += 16) {
 114         r = deposit64(r, i, 16, sextract64(a, i + b, 16 - b));
 115     }
 116     return r;
 117 }
 118
 119 uint64_t helper_v1int_h(uint64_t a, uint64_t b)
 120 {
 121     uint64_t r = 0;
 122     int i;
 123
 124     for (i = 0; i < 32; i += 8) {
 125         r = deposit64(r, 2 * i + 8, 8, extract64(a, i + 32, 8));
 126         r = deposit64(r, 2 * i, 8, extract64(b, i + 32, 8));
 127     }
 128     return r;
 129 }
 130
 131 uint64_t helper_v1int_l(uint64_t a, uint64_t b)
 132 {
 133     uint64_t r = 0;
 134     int i;
 135
 136     for (i = 0; i < 32; i += 8) {
 137         r = deposit64(r, 2 * i + 8, 8, extract64(a, i, 8));
 138         r = deposit64(r, 2 * i, 8, extract64(b, i, 8));
 139     }
 140     return r;
 141 }
 142
 143 uint64_t helper_v2int_h(uint64_t a, uint64_t b)
 144 {
 145     uint64_t r = 0;
 146     int i;
 147
 148     for (i = 0; i < 32; i += 16) {
 149         r = deposit64(r, 2 * i + 16, 16, extract64(a, i + 32, 16));
 150         r = deposit64(r, 2 * i, 16, extract64(b, i + 32, 16));
 151     }
 152     return r;
 153 }
 154
 155 uint64_t helper_v2int_l(uint64_t a, uint64_t b)
 156 {
 157     uint64_t r = 0;
 158     int i;
 159
 160     for (i = 0; i < 32; i += 16) {
 161         r = deposit64(r, 2 * i + 16, 16, extract64(a, i, 16));
 162         r = deposit64(r, 2 * i, 16, extract64(b, i, 16));
 163     }
 164     return r;
 165 }