95 lines · c
1// SPDX-License-Identifier: GPL-2.02#undef _GNU_SOURCE3#define _GNU_SOURCE 14#undef __USE_GNU5#define __USE_GNU 16#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) \17long 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 33TEST(fcmovb)34TEST(fcmove)35TEST(fcmovbe)36TEST(fcmovu)37TEST(fcmovnb)38TEST(fcmovne)39TEST(fcmovnbe)40TEST(fcmovnu)41 42enum {43 CF = 1 << 0,44 PF = 1 << 2,45 ZF = 1 << 6,46};47 48void sighandler(int sig)49{50 printf("[FAIL]\tGot signal %d, exiting\n", sig);51 exit(1);52}53 54int main(int argc, char **argv, char **envp)55{56 int err = 0;57 58 /* SIGILL triggers on 32-bit kernels w/o fcomi emulation59 * when run with "no387 nofxsr". Other signals are caught60 * 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 else91 printf("[FAIL]\tfcmovCC errors: %d\n", err);92 93 return err;94}95