2010-09-19 Basile Starynkevitch <basile@starynkevitch.net>

	MELT branch merged with trunk rev 164348, with some improvements
	in gcc/melt-runtime.[ch]

2010-09-19  Basile Starynkevitch  <basile@starynkevitch.net>
	[[merged with trunk rev.164348, so improved MELT runtime!]]
	* gcc/melt-runtime.h: improved comments.
	(melt_debug_garbcoll, melt_debuggc_eprintf):  Moved from melt-runtime.c.
	(melt_obmag_string): New declaration.
	(struct meltobject_st, struct meltclosure_st, struct
	meltroutine_st, struct meltmixbigint_st, struct meltstring_st):
	using GTY variable_size and @@MELTGTY@@ comment.
	(melt_mark_special): added debug print.

	* gcc/melt-runtime.c:  Improved comments.
	Include bversion.h, realmpfr.h, gimple-pretty-print.h.
	(ggc_force_collect) Declared external.
	(melt_forward_counter): Added.
	(melt_obmag_string): New function.
	(melt_alptr_1, melt_alptr_2, melt_break_alptr_1_at)
	(melt_break_alptr_2_at, melt_break_alptr_1,melt_break_alptr_1)
	(melt_allocate_young_gc_zone, melt_free_young_gc_zone): New.
	(delete_special, meltgc_make_special): Improved debug printf and
	use melt_break_alptr_1...
	(ggc_alloc_*) macros defined for backport to GCC 4.5
	(melt_forwarded_copy): Don't clear the new destination zone in old
	GGC heap.
	(meltgc_add_out_raw_len): Use ggc_alloc_atomic.
	(meltgc_raw_new_mappointers, meltgc_raw_put_mappointers)
	(meltgc_raw_remove_mappointers): Corrected length argument to
	ggc_alloc_cleared_vec_entrypointermelt_st.
	(melt_really_initialize): Call melt_allocate_young_gc_zone.
	(melt_initialize):  Set flag_plugin_added.
	(melt_val2passflag): TODO_verify_loops only in GCC 4.5




git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@164424 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 47 insertions, 1 deletions

diff --git a/libgfortran/config/fpu-387.h b/libgfortran/config/fpu-387.h
index 573fabcac6d..2bd9efb5512 100644
--- a/libgfortran/config/fpu-387.h
+++ b/libgfortran/config/fpu-387.h
@@ -1,5 +1,5 @@
 /* FPU-related code for x86 and x86_64 processors.
-   Copyright 2005, 2007, 2009 Free Software Foundation, Inc.
+   Copyright 2005, 2007, 2009, 2010 Free Software Foundation, Inc.
    Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
 
 This file is part of the GNU Fortran 95 runtime library (libgfortran).
@@ -27,6 +27,26 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "cpuid.h"
 #endif
 
+#if defined(__sun__) && defined(__svr4__)
+#include <signal.h>
+#include <ucontext.h>
+
+static volatile sig_atomic_t sigill_caught;
+
+static void
+sigill_hdlr (int sig __attribute((unused)),
+	     siginfo_t *sip __attribute__((unused)),
+	     ucontext_t *ucp)
+{
+  sigill_caught = 1;
+  /* Set PC to the instruction after the faulting one to skip over it,
+     otherwise we enter an infinite loop.  4 is the size of the stmxcsr
+     instruction.  */
+  ucp->uc_mcontext.gregs[EIP] += 4;
+  setcontext (ucp);
+}
+#endif
+
 static int
 has_sse (void)
 {
@@ -36,6 +56,32 @@ has_sse (void)
   if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
     return 0;
 
+#if defined(__sun__) && defined(__svr4__)
+  /* Solaris 2 before Solaris 9 4/04 cannot execute SSE instructions even
+     if the CPU supports them.  Programs receive SIGILL instead, so check
+     for that at runtime.  */
+
+  if (edx & bit_SSE)
+    {
+      struct sigaction act, oact;
+
+      act.sa_handler = sigill_hdlr;
+      sigemptyset (&act.sa_mask);
+      /* Need to set SA_SIGINFO so a ucontext_t * is passed to the handler.  */
+      act.sa_flags = SA_SIGINFO;
+      sigaction (SIGILL, &act, &oact);
+
+      /* We need a single SSE instruction here so the handler can safely skip
+	 over it.  */
+      __asm__ volatile ("movss %xmm2,%xmm1");
+
+      sigaction (SIGILL, &oact, NULL);
+
+      if (sigill_caught)
+	return 0;
+    }
+#endif /* __sun__ && __svr4__ */
+
   return edx & bit_SSE;
 #else
   return 1;