57ca6897cd
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1442494933-13798-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
#undef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#undef __USE_GNU
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#define __USE_GNU 1
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#define TEST(insn) \
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long double __attribute__((noinline)) insn(long flags) \
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{ \
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long double out; \
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asm ("\n" \
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" push %1""\n" \
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" popf""\n" \
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" fldpi""\n" \
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" fld1""\n" \
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" " #insn " %%st(1), %%st" "\n" \
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" ffree %%st(1)" "\n" \
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: "=t" (out) \
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: "r" (flags) \
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); \
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return out; \
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}
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TEST(fcmovb)
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TEST(fcmove)
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TEST(fcmovbe)
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TEST(fcmovu)
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TEST(fcmovnb)
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TEST(fcmovne)
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TEST(fcmovnbe)
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TEST(fcmovnu)
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enum {
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CF = 1 << 0,
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PF = 1 << 2,
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ZF = 1 << 6,
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};
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void sighandler(int sig)
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{
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printf("[FAIL]\tGot signal %d, exiting\n", sig);
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exit(1);
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}
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int main(int argc, char **argv, char **envp)
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{
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int err = 0;
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/* SIGILL triggers on 32-bit kernels w/o fcomi emulation
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* when run with "no387 nofxsr". Other signals are caught
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* just in case.
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*/
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signal(SIGILL, sighandler);
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signal(SIGFPE, sighandler);
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signal(SIGSEGV, sighandler);
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printf("[RUN]\tTesting fcmovCC instructions\n");
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/* If fcmovCC() returns 1.0, the move wasn't done */
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err |= !(fcmovb(0) == 1.0); err |= !(fcmovnb(0) != 1.0);
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err |= !(fcmove(0) == 1.0); err |= !(fcmovne(0) != 1.0);
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err |= !(fcmovbe(0) == 1.0); err |= !(fcmovnbe(0) != 1.0);
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err |= !(fcmovu(0) == 1.0); err |= !(fcmovnu(0) != 1.0);
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err |= !(fcmovb(CF) != 1.0); err |= !(fcmovnb(CF) == 1.0);
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err |= !(fcmove(CF) == 1.0); err |= !(fcmovne(CF) != 1.0);
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err |= !(fcmovbe(CF) != 1.0); err |= !(fcmovnbe(CF) == 1.0);
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err |= !(fcmovu(CF) == 1.0); err |= !(fcmovnu(CF) != 1.0);
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err |= !(fcmovb(ZF) == 1.0); err |= !(fcmovnb(ZF) != 1.0);
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err |= !(fcmove(ZF) != 1.0); err |= !(fcmovne(ZF) == 1.0);
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err |= !(fcmovbe(ZF) != 1.0); err |= !(fcmovnbe(ZF) == 1.0);
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err |= !(fcmovu(ZF) == 1.0); err |= !(fcmovnu(ZF) != 1.0);
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err |= !(fcmovb(PF) == 1.0); err |= !(fcmovnb(PF) != 1.0);
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err |= !(fcmove(PF) == 1.0); err |= !(fcmovne(PF) != 1.0);
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err |= !(fcmovbe(PF) == 1.0); err |= !(fcmovnbe(PF) != 1.0);
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err |= !(fcmovu(PF) != 1.0); err |= !(fcmovnu(PF) == 1.0);
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if (!err)
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printf("[OK]\tfcmovCC\n");
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else
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printf("[FAIL]\tfcmovCC errors: %d\n", err);
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return err;
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}
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