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
|
// SPDX-License-Identifier: GPL-2.0
#undef _GNU_SOURCE
#define _GNU_SOURCE 1
#undef __USE_GNU
#define __USE_GNU 1
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/wait.h>
#define TEST(insn) \
long double __attribute__((noinline)) insn(long flags) \
{ \
long double out; \
asm ("\n" \
" push %1""\n" \
" popf""\n" \
" fldpi""\n" \
" fld1""\n" \
" " #insn " %%st(1), %%st" "\n" \
" ffree %%st(1)" "\n" \
: "=t" (out) \
: "r" (flags) \
); \
return out; \
}
TEST(fcmovb)
TEST(fcmove)
TEST(fcmovbe)
TEST(fcmovu)
TEST(fcmovnb)
TEST(fcmovne)
TEST(fcmovnbe)
TEST(fcmovnu)
enum {
CF = 1 << 0,
PF = 1 << 2,
ZF = 1 << 6,
};
void sighandler(int sig)
{
printf("[FAIL]\tGot signal %d, exiting\n", sig);
exit(1);
}
int main(int argc, char **argv, char **envp)
{
int err = 0;
/* SIGILL triggers on 32-bit kernels w/o fcomi emulation
* when run with "no387 nofxsr". Other signals are caught
* just in case.
*/
signal(SIGILL, sighandler);
signal(SIGFPE, sighandler);
signal(SIGSEGV, sighandler);
printf("[RUN]\tTesting fcmovCC instructions\n");
/* If fcmovCC() returns 1.0, the move wasn't done */
err |= !(fcmovb(0) == 1.0); err |= !(fcmovnb(0) != 1.0);
err |= !(fcmove(0) == 1.0); err |= !(fcmovne(0) != 1.0);
err |= !(fcmovbe(0) == 1.0); err |= !(fcmovnbe(0) != 1.0);
err |= !(fcmovu(0) == 1.0); err |= !(fcmovnu(0) != 1.0);
err |= !(fcmovb(CF) != 1.0); err |= !(fcmovnb(CF) == 1.0);
err |= !(fcmove(CF) == 1.0); err |= !(fcmovne(CF) != 1.0);
err |= !(fcmovbe(CF) != 1.0); err |= !(fcmovnbe(CF) == 1.0);
err |= !(fcmovu(CF) == 1.0); err |= !(fcmovnu(CF) != 1.0);
err |= !(fcmovb(ZF) == 1.0); err |= !(fcmovnb(ZF) != 1.0);
err |= !(fcmove(ZF) != 1.0); err |= !(fcmovne(ZF) == 1.0);
err |= !(fcmovbe(ZF) != 1.0); err |= !(fcmovnbe(ZF) == 1.0);
err |= !(fcmovu(ZF) == 1.0); err |= !(fcmovnu(ZF) != 1.0);
err |= !(fcmovb(PF) == 1.0); err |= !(fcmovnb(PF) != 1.0);
err |= !(fcmove(PF) == 1.0); err |= !(fcmovne(PF) != 1.0);
err |= !(fcmovbe(PF) == 1.0); err |= !(fcmovnbe(PF) != 1.0);
err |= !(fcmovu(PF) != 1.0); err |= !(fcmovnu(PF) == 1.0);
if (!err)
printf("[OK]\tfcmovCC\n");
else
printf("[FAIL]\tfcmovCC errors: %d\n", err);
return err;
}
|
