tests/tcg/hexagon/read_write_overlap.c

   1 /*
   2  *  Copyright(c) 2023 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 /*
  19  * Test instructions where the semantics write to the destination
  20  * before all the operand reads have been completed.
  21  *
  22  * These instructions are problematic when we short-circuit the
  23  * register writes because the destination and source operands could
  24  * be the same TCGv.
  25  *
  26  * We test by forcing the read and write to be register r7.
  27  */
  28
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32
  33 int err;
  34
  35 #include "hex_test.h"
  36
  37 #define insert(RES, X, WIDTH, OFFSET) \
  38     asm("r7 = %1\n\t" \
  39         "r7 = insert(r7, #" #WIDTH ", #" #OFFSET ")\n\t" \
  40         "%0 = r7\n\t" \
  41         : "=r"(RES) : "r"(X) : "r7")
  42
  43 static void test_insert(void)
  44 {
  45     uint32_t res;
  46
  47     insert(res, 0x12345678, 8, 1);
  48     check32(res, 0x123456f0);
  49     insert(res, 0x12345678, 0, 1);
  50     check32(res, 0x12345678);
  51     insert(res, 0x12345678, 20, 16);
  52     check32(res, 0x56785678);
  53 }
  54
  55 static inline uint32_t insert_rp(uint32_t x, uint32_t width, uint32_t offset)
  56 {
  57     uint64_t width_offset = (uint64_t)width << 32 | offset;
  58     uint32_t res;
  59     asm("r7 = %1\n\t"
  60         "r7 = insert(r7, %2)\n\t"
  61         "%0 = r7\n\t"
  62         : "=r"(res) : "r"(x), "r"(width_offset) : "r7");
  63     return res;
  64
  65 }
  66
  67 static void test_insert_rp(void)
  68 {
  69     check32(insert_rp(0x12345678,   8,  1), 0x123456f0);
  70     check32(insert_rp(0x12345678,  63,  8), 0x34567878);
  71     check32(insert_rp(0x12345678, 127,  8), 0x34567878);
  72     check32(insert_rp(0x12345678,   8, 24), 0x78345678);
  73     check32(insert_rp(0x12345678,   8, 63), 0x12345678);
  74     check32(insert_rp(0x12345678,   8, 64), 0x00000000);
  75 }
  76
  77 static inline uint32_t asr_r_svw_trun(uint64_t x, uint32_t y)
  78 {
  79     uint32_t res;
  80     asm("r7 = %2\n\t"
  81         "r7 = vasrw(%1, r7)\n\t"
  82         "%0 = r7\n\t"
  83         : "=r"(res) : "r"(x), "r"(y) : "r7");
  84     return res;
  85 }
  86
  87 static void test_asr_r_svw_trun(void)
  88 {
  89     check32(asr_r_svw_trun(0x1111111122222222ULL, 5),
  90             0x88881111);
  91     check32(asr_r_svw_trun(0x1111111122222222ULL, 63),
  92             0x00000000);
  93     check32(asr_r_svw_trun(0x1111111122222222ULL, 64),
  94             0x00000000);
  95     check32(asr_r_svw_trun(0x1111111122222222ULL, 127),
  96             0x22224444);
  97     check32(asr_r_svw_trun(0x1111111122222222ULL, 128),
  98             0x11112222);
  99     check32(asr_r_svw_trun(0xffffffff22222222ULL, 128),
 100             0xffff2222);
 101 }
 102
 103 static inline uint32_t swiz(uint32_t x)
 104 {
 105     uint32_t res;
 106     asm("r7 = %1\n\t"
 107         "r7 = swiz(r7)\n\t"
 108         "%0 = r7\n\t"
 109         : "=r"(res) : "r"(x) : "r7");
 110     return res;
 111 }
 112
 113 static void test_swiz(void)
 114 {
 115     check32(swiz(0x11223344), 0x44332211);
 116 }
 117
 118 int main()
 119 {
 120     test_insert();
 121     test_insert_rp();
 122     test_asr_r_svw_trun();
 123     test_swiz();
 124
 125     puts(err ? "FAIL" : "PASS");
 126     return err ? EXIT_FAILURE : EXIT_SUCCESS;
 127 }