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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.target/] [i386/] [sse-os-support.h] - Blame information for rev 318

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Line No. Rev Author Line
1 318 jeremybenn
#if defined(__sun__) && defined(__svr4__)
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/* Make sure sigaction() is declared even with -std=c99.  */
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#define __EXTENSIONS__
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#include <signal.h>
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#include <ucontext.h>
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static volatile sig_atomic_t sigill_caught;
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static void
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sigill_hdlr (int sig __attribute((unused)),
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             siginfo_t *sip __attribute__((unused)),
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             ucontext_t *ucp)
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{
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  sigill_caught = 1;
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  /* Set PC to the instruction after the faulting one to skip over it,
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     otherwise we enter an infinite loop.  */
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  ucp->uc_mcontext.gregs[EIP] += 4;
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  setcontext (ucp);
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}
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#endif
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/* Check if the OS supports executing SSE instructions.  This function is
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   only used in sse-check.h, sse2-check.h, and sse3-check.h so far since
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   Solaris 8 and 9 won't run on newer CPUs anyway.  */
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static int
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sse_os_support (void)
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{
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#if defined(__sun__) && defined(__svr4__)
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  /* Solaris 2 before Solaris 9 4/04 cannot execute SSE instructions
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     even if the CPU supports them.  Programs receive SIGILL instead, so
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     check for that at runtime.  */
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  struct sigaction act, oact;
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  act.sa_handler = sigill_hdlr;
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  sigemptyset (&act.sa_mask);
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  /* Need to set SA_SIGINFO so a ucontext_t * is passed to the handler.  */
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  act.sa_flags = SA_SIGINFO;
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  sigaction (SIGILL, &act, &oact);
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  /* We need a single SSE instruction here so the handler can safely skip
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     over it.  */
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  __asm__ volatile ("movss %xmm2,%xmm1");
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  sigaction (SIGILL, &oact, NULL);
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  if (sigill_caught)
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    exit (0);
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  else
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    return 1;
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#else
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  return 1;
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#endif /* __sun__ && __svr4__ */
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}

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