1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
int err;
#include "hex_test.h"
static uint32_t preg_alias(uint8_t v0, uint8_t v1, uint8_t v2, uint8_t v3)
{
uint32_t ret;
asm volatile("p0 = %1\n\t"
"p1 = %2\n\t"
"p2 = %3\n\t"
"p3 = %4\n\t"
"%0 = C4\n"
: "=r"(ret)
: "r"(v0), "r"(v1), "r"(v2), "r"(v3)
: "p0", "p1", "p2", "p3");
return ret;
}
static uint32_t preg_alias_pair(uint8_t v0, uint8_t v1, uint8_t v2, uint8_t v3)
{
uint64_t c54;
asm volatile("p0 = %1\n\t"
"p1 = %2\n\t"
"p2 = %3\n\t"
"p3 = %4\n\t"
"%0 = C5:4\n"
: "=r"(c54)
: "r"(v0), "r"(v1), "r"(v2), "r"(v3)
: "p0", "p1", "p2", "p3");
return (uint32_t)c54;
}
typedef union {
uint32_t creg;
struct {
uint8_t p0;
uint8_t p1;
uint8_t p2;
uint8_t p3;
} pregs;
} PRegs;
static inline void creg_alias(uint32_t cval, PRegs *pregs)
{
asm("c4 = %4\n\t"
"%0 = p0\n\t"
"%1 = p1\n\t"
"%2 = p2\n\t"
"%3 = p3\n\t"
: "=r"(pregs->pregs.p0), "=r"(pregs->pregs.p1),
"=r"(pregs->pregs.p2), "=r"(pregs->pregs.p3)
: "r"(cval)
: "c4", "p0", "p1", "p2", "p3");
}
static inline void creg_alias_pair(uint32_t cval, PRegs *pregs)
{
uint64_t cval_pair = (0xdeadbeefULL << 32) | cval;
uint32_t c5;
asm ("c5:4 = %5\n\t"
"%0 = p0\n\t"
"%1 = p1\n\t"
"%2 = p2\n\t"
"%3 = p3\n\t"
"%4 = c5\n\t"
: "=r"(pregs->pregs.p0), "=r"(pregs->pregs.p1),
"=r"(pregs->pregs.p2), "=r"(pregs->pregs.p3), "=r"(c5)
: "r"(cval_pair)
: "c4", "c5", "p0", "p1", "p2", "p3");
check32(c5, 0xdeadbeef);
}
static void test_packet(void)
{
/*
* Test that setting c4 inside a packet doesn't impact the predicates
* that are read during the packet.
*/
uint32_t result;
uint32_t old_val = 0x0000001c;
/* Test a predicated register transfer */
result = old_val;
asm (
"c4 = %1\n\t"
"{\n\t"
" c4 = %2\n\t"
" if (!p2) %0 = %3\n\t"
"}\n\t"
: "+r"(result)
: "r"(0xffffffff), "r"(0xff00ffff), "r"(0x837ed653)
: "c4", "p0", "p1", "p2", "p3");
check32(result, old_val);
/* Test a predicated store */
result = 0xffffffff;
asm ("c4 = %0\n\t"
"{\n\t"
" c4 = %1\n\t"
" if (!p2) memw(%2) = #0\n\t"
"}\n\t"
:
: "r"(0), "r"(0xffffffff), "r"(&result)
: "c4", "p0", "p1", "p2", "p3", "memory");
check32(result, 0x0);
}
int main()
{
uint32_t c4;
PRegs pregs;
c4 = preg_alias(0xff, 0x00, 0xff, 0x00);
check32(c4, 0x00ff00ff);
c4 = preg_alias(0xff, 0x00, 0x00, 0x00);
check32(c4, 0x000000ff);
c4 = preg_alias(0x00, 0xff, 0x00, 0x00);
check32(c4, 0x0000ff00);
c4 = preg_alias(0x00, 0x00, 0xff, 0x00);
check32(c4, 0x00ff0000);
c4 = preg_alias(0x00, 0x00, 0x00, 0xff);
check32(c4, 0xff000000);
c4 = preg_alias(0xff, 0xff, 0xff, 0xff);
check32(c4, 0xffffffff);
c4 = preg_alias_pair(0xff, 0x00, 0xff, 0x00);
check32(c4, 0x00ff00ff);
c4 = preg_alias_pair(0xff, 0x00, 0x00, 0x00);
check32(c4, 0x000000ff);
c4 = preg_alias_pair(0x00, 0xff, 0x00, 0x00);
check32(c4, 0x0000ff00);
c4 = preg_alias_pair(0x00, 0x00, 0xff, 0x00);
check32(c4, 0x00ff0000);
c4 = preg_alias_pair(0x00, 0x00, 0x00, 0xff);
check32(c4, 0xff000000);
c4 = preg_alias_pair(0xff, 0xff, 0xff, 0xff);
check32(c4, 0xffffffff);
creg_alias(0x00ff00ff, &pregs);
check32(pregs.creg, 0x00ff00ff);
creg_alias(0x00ffff00, &pregs);
check32(pregs.creg, 0x00ffff00);
creg_alias(0x00000000, &pregs);
check32(pregs.creg, 0x00000000);
creg_alias(0xff000000, &pregs);
check32(pregs.creg, 0xff000000);
creg_alias(0x00ff0000, &pregs);
check32(pregs.creg, 0x00ff0000);
creg_alias(0x0000ff00, &pregs);
check32(pregs.creg, 0x0000ff00);
creg_alias(0x000000ff, &pregs);
check32(pregs.creg, 0x000000ff);
creg_alias(0xffffffff, &pregs);
check32(pregs.creg, 0xffffffff);
creg_alias_pair(0x00ff00ff, &pregs);
check32(pregs.creg, 0x00ff00ff);
creg_alias_pair(0x00ffff00, &pregs);
check32(pregs.creg, 0x00ffff00);
creg_alias_pair(0x00000000, &pregs);
check32(pregs.creg, 0x00000000);
creg_alias_pair(0xff000000, &pregs);
check32(pregs.creg, 0xff000000);
creg_alias_pair(0x00ff0000, &pregs);
check32(pregs.creg, 0x00ff0000);
creg_alias_pair(0x0000ff00, &pregs);
check32(pregs.creg, 0x0000ff00);
creg_alias_pair(0x000000ff, &pregs);
check32(pregs.creg, 0x000000ff);
creg_alias_pair(0xffffffff, &pregs);
check32(pregs.creg, 0xffffffff);
test_packet();
puts(err ? "FAIL" : "PASS");
return err;
}
|
