tests/tcg/hexagon/dual_stores.c

   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  */
  25 static 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
  35 typedef union {
  36     int word;
  37     char byte;
  38 } Dual;
  39
  40 int err;
  41
  42 static 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
  50 int 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 }