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 48 void sighandler(int sig) 49 { 50 printf("[FAIL]\tGot signal %d, exiting\n", sig); 51 exit(1); 52 } 53 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