1/*
2 * Copyright (c) 2018, Cornell University
3 * All rights reserved.
4 *
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6 * without modification, are permitted provided that the following
7 * conditions are met:
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9 * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * Neither the name of Cornell University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
22 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
29 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 * Authors: Tuan Ta
36 */
37
38//------------------------------------------------------------------------
39// This code tests amomin_d instruction in multi-threading system.
40// All threads execute an amomin_d instruction.
41// Master thread (i.e., thread 0) waits for all threads to complete by
42// spinning on the barrier variable until all threads update the variable.
43// Then, the master thread checks the shared variable's value.
44//------------------------------------------------------------------------
45
46#include "riscv_test.h"
47#include "test_macros.h"
48#include "test_macros_mt.h"
49
50  RVTEST_RV64U
51  RVTEST_CODE_BEGIN
52
53#define RESULT      0xDEADBEEFDEADBEEF
54
55//------------------------------------------------------------------------
56// Reinitialize shared_var to 0x7fffffffffffffff
57//------------------------------------------------------------------------
58  la  a0, shared_var
59  li  t0, 0x7fffffffffffffff
60  sd  t0, (a0)
61
62//------------------------------------------------------------------------
63// Master thread creates new threads, waits for all threads to complete,
64// deallocates threads and checks result
65//------------------------------------------------------------------------
66  call _create_threads
67  call _join
68  call _delete_threads
69  call _check
70
71  RVTEST_CODE_END
72
73//------------------------------------------------------------------------
74// mt_test function executed in child threads
75// A child thread signals its completion by atomicaly adding 1 to barrier
76//------------------------------------------------------------------------
77_mt_test:
78  la        a0, shared_var
79  la        t0, array_index
80  li        t1, 8
81  amoadd.d  t1, t1, (t0)        // get my array_index
82
83  la        t0, array
84  add       t0, t0, t1
85  ld        t0, (t0)            // get array[array_index]
86
87  amomin.d  zero, t0, (a0)
88
89  li        t0, 1
90  la        a0, barrier
91  amoadd.d  zero, t0, (a0)
92
93  RVTEST_CODE_END
94
95//------------------------------------------------------------------------
96// Master thread checks result
97//------------------------------------------------------------------------
98_check:
99  la        a0, shared_var
100  li        a1, RESULT
101  ld        a0, (a0)
102  bne       a0, a1, _fail
103  li        a0, SUCCESS
104  ret
105
106_fail:
107  li        a0, FAILURE
108  ret
109
110  .data
111
112MT_DATA
113array_index:    .dword    0;
114