1 // SPDX-License-Identifier: GPL-2.0
2 #undef _GNU_SOURCE
3 #define _GNU_SOURCE 1
4 #undef __USE_GNU
5 #define __USE_GNU 1
6 #include <unistd.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <stdio.h>
10 #include <signal.h>
11 #include <sys/types.h>
12 #include <sys/select.h>
13 #include <sys/time.h>
14 #include <sys/wait.h>
15
16 #define TEST(insn) \
17 long double __attribute__((noinline)) insn(long flags) \
18 { \
19 long double out; \
20 asm ("\n" \
21 " push %1""\n" \
22 " popf""\n" \
23 " fldpi""\n" \
24 " fld1""\n" \
25 " " #insn " %%st(1), %%st" "\n" \
26 " ffree %%st(1)" "\n" \
27 : "=t" (out) \
28 : "r" (flags) \
29 ); \
30 return out; \
31 }
32
33 TEST(fcmovb)
34 TEST(fcmove)
35 TEST(fcmovbe)
36 TEST(fcmovu)
37 TEST(fcmovnb)
38 TEST(fcmovne)
39 TEST(fcmovnbe)
40 TEST(fcmovnu)
41
42 enum {
43 CF = 1 << 0,
44 PF = 1 << 2,
45 ZF = 1 << 6,
46 };
47
sighandler(int sig)48 void sighandler(int sig)
49 {
50 printf("[FAIL]\tGot signal %d, exiting\n", sig);
51 exit(1);
52 }
53
main(int argc,char ** argv,char ** envp)54 int main(int argc, char **argv, char **envp)
55 {
56 int err = 0;
57
58 /* SIGILL triggers on 32-bit kernels w/o fcomi emulation
59 * when run with "no387 nofxsr". Other signals are caught
60 * just in case.
61 */
62 signal(SIGILL, sighandler);
63 signal(SIGFPE, sighandler);
64 signal(SIGSEGV, sighandler);
65
66 printf("[RUN]\tTesting fcmovCC instructions\n");
67 /* If fcmovCC() returns 1.0, the move wasn't done */
68 err |= !(fcmovb(0) == 1.0); err |= !(fcmovnb(0) != 1.0);
69 err |= !(fcmove(0) == 1.0); err |= !(fcmovne(0) != 1.0);
70 err |= !(fcmovbe(0) == 1.0); err |= !(fcmovnbe(0) != 1.0);
71 err |= !(fcmovu(0) == 1.0); err |= !(fcmovnu(0) != 1.0);
72
73 err |= !(fcmovb(CF) != 1.0); err |= !(fcmovnb(CF) == 1.0);
74 err |= !(fcmove(CF) == 1.0); err |= !(fcmovne(CF) != 1.0);
75 err |= !(fcmovbe(CF) != 1.0); err |= !(fcmovnbe(CF) == 1.0);
76 err |= !(fcmovu(CF) == 1.0); err |= !(fcmovnu(CF) != 1.0);
77
78 err |= !(fcmovb(ZF) == 1.0); err |= !(fcmovnb(ZF) != 1.0);
79 err |= !(fcmove(ZF) != 1.0); err |= !(fcmovne(ZF) == 1.0);
80 err |= !(fcmovbe(ZF) != 1.0); err |= !(fcmovnbe(ZF) == 1.0);
81 err |= !(fcmovu(ZF) == 1.0); err |= !(fcmovnu(ZF) != 1.0);
82
83 err |= !(fcmovb(PF) == 1.0); err |= !(fcmovnb(PF) != 1.0);
84 err |= !(fcmove(PF) == 1.0); err |= !(fcmovne(PF) != 1.0);
85 err |= !(fcmovbe(PF) == 1.0); err |= !(fcmovnbe(PF) != 1.0);
86 err |= !(fcmovu(PF) != 1.0); err |= !(fcmovnu(PF) == 1.0);
87
88 if (!err)
89 printf("[OK]\tfcmovCC\n");
90 else
91 printf("[FAIL]\tfcmovCC errors: %d\n", err);
92
93 return err;
94 }
95