LXR qemu/tests/tcg/hexagon/dual

   1/*
   2 *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3 *
   4 *  This program is free software; you can redistribute it and/or modify
   5 *  it under the terms of the GNU General Public License as published by
   6 *  the Free Software Foundation; either version 2 of the License, or
   7 *  (at your option) any later version.
   8 *
   9 *  This program 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
  12 *  GNU General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License
  15 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#include <stdio.h>
  19
  20/*
  21 *  Make sure that two stores in the same packet honor proper
  22 *  semantics: slot 1 executes first, then slot 0.
  23 *  This is important when the addresses overlap.
  24 */
  25static inline void dual_stores(int *p, char *q, int x, char y)
  26{
  27  asm volatile("{\n\t"
  28               "    memw(%0) = %2\n\t"
  29               "    memb(%1) = %3\n\t"
  30               "}\n"
  31               :: "r"(p), "r"(q), "r"(x), "r"(y)
  32               : "memory");
  33}
  34
  35typedef union {
  36    int word;
  37    char byte;
  38} Dual;
  39
  40int err;
  41
  42static void check(Dual d, int expect)
  43{
  44    if (d.word != expect) {
  45        printf("ERROR: 0x%08x != 0x%08x\n", d.word, expect);
  46        err++;
  47    }
  48}
  49
  50int main()
  51{
  52    Dual d;
  53
  54    d.word = ~0;
  55    dual_stores(&d.word, &d.byte, 0x12345678, 0xff);
  56    check(d, 0x123456ff);
  57
  58    puts(err ? "FAIL" : "PASS");
  59    return err;
  60}
  61