PR fortran/29383

gcc/fortran/
	* gfortran.h (gfc_simplify_ieee_selected_real_kind): New prototype.
	* libgfortran.h (GFC_FPE_*): Use simple integer values, valid in
	both C and Fortran.
	* expr.c (gfc_check_init_expr): Simplify IEEE_SELECTED_REAL_KIND.
	* simplify.c (gfc_simplify_ieee_selected_real_kind): New function.
	* module.c (mio_symbol): Keep track of symbols which came from
	intrinsic modules.
	(gfc_use_module): Keep track of the IEEE modules.
	* trans-decl.c (gfc_get_symbol_decl): Adjust code since
	we have new intrinsic modules.
	(gfc_build_builtin_function_decls): Build decls for
	ieee_procedure_entry and ieee_procedure_exit.
	(is_from_ieee_module, is_ieee_module_used, save_fp_state,
	restore_fp_state): New functions.
	(gfc_generate_function_code): Save and restore floating-point
	state on procedure entry/exit, when IEEE modules are used.
	* intrinsic.texi: Document the IEEE modules.

libgfortran/
	* configure.host: Add checks for IEEE support, rework priorities.
	* configure.ac: Define IEEE_SUPPORT, check for fpsetsticky and
	fpresetsticky.
	* configure: Regenerate.
	* Makefile.am: Build new ieee files, install IEEE_* modules.
	* Makefile.in: Regenerate.
	* gfortran.map (GFORTRAN_1.6): Add new symbols.
	* libgfortran.h (get_fpu_trap_exceptions, set_fpu_trap_exceptions,
	support_fpu_trap, set_fpu_except_flags, support_fpu_flag,
	support_fpu_rounding_mode, get_fpu_state, set_fpu_state): New
	prototypes.
	* config/fpu-*.h (get_fpu_trap_exceptions,
	set_fpu_trap_exceptions, support_fpu_trap, set_fpu_except_flags,
	support_fpu_flag, support_fpu_rounding_mode, get_fpu_state,
	set_fpu_state): New functions.
	* ieee/ieee_features.F90: New file.
	* ieee/ieee_exceptions.F90: New file.
	* ieee/ieee_arithmetic.F90: New file.
	* ieee/ieee_helper.c: New file.

gcc/testsuite/
	* lib/target-supports.exp (check_effective_target_fortran_ieee): 
	New function.
	* gfortran.dg/ieee/ieee.exp: New file.
	* gfortran.dg/ieee/ieee_1.F90: New file.
	* gfortran.dg/ieee/ieee_2.f90: New file.
	* gfortran.dg/ieee/ieee_3.f90: New file.
	* gfortran.dg/ieee/ieee_4.f90: New file.
	* gfortran.dg/ieee/ieee_5.f90: New file.
	* gfortran.dg/ieee/ieee_6.f90: New file.
	* gfortran.dg/ieee/ieee_7.f90: New file.
	* gfortran.dg/ieee/ieee_rounding_1.f90: New file.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212102 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 28 insertions, 1 deletions

diff --git a/gcc/fortran/module.c b/gcc/fortran/module.c
index ec67960eae9..bd7da1c37df 100644
--- a/gcc/fortran/module.c
+++ b/gcc/fortran/module.c
@@ -190,6 +190,9 @@ static gzFile module_fp;
 static const char *module_name;
 static gfc_use_list *module_list;
 
+/* If we're reading an intrinsic module, this is its ID.  */
+static intmod_id current_intmod;
+
 /* Content of module.  */
 static char* module_content;
 
@@ -4096,7 +4099,10 @@ mio_symbol (gfc_symbol *sym)
   else
     {
       mio_integer (&intmod);
-      sym->from_intmod = (intmod_id) intmod;
+      if (current_intmod)
+	sym->from_intmod = current_intmod;
+      else
+	sym->from_intmod = (intmod_id) intmod;
     }
   
   mio_integer (&(sym->intmod_sym_id));
@@ -6733,6 +6739,7 @@ gfc_use_module (gfc_use_list *module)
   module_name = module->module_name;
   gfc_rename_list = module->rename;
   only_flag = module->only_flag;
+  current_intmod = INTMOD_NONE;
 
   filename = XALLOCAVEC (char, strlen (module_name) + strlen (MODULE_EXTENSION)
 			       + 1);
@@ -6777,6 +6784,26 @@ gfc_use_module (gfc_use_list *module)
       if (module_fp == NULL && module->intrinsic)
 	gfc_fatal_error ("Can't find an intrinsic module named '%s' at %C",
 			 module_name);
+
+      /* Check for the IEEE modules, so we can mark their symbols
+	 accordingly when we read them.  */
+      if (strcmp (module_name, "ieee_features") == 0
+	  && gfc_notify_std (GFC_STD_F2003, "IEEE_FEATURES module at %C"))
+	{
+	  current_intmod = INTMOD_IEEE_FEATURES;
+	}
+      else if (strcmp (module_name, "ieee_exceptions") == 0
+	       && gfc_notify_std (GFC_STD_F2003,
+				  "IEEE_EXCEPTIONS module at %C"))
+	{
+	  current_intmod = INTMOD_IEEE_EXCEPTIONS;
+	}
+      else if (strcmp (module_name, "ieee_arithmetic") == 0
+	       && gfc_notify_std (GFC_STD_F2003,
+				  "IEEE_ARITHMETIC module at %C"))
+	{
+	  current_intmod = INTMOD_IEEE_ARITHMETIC;
+	}
     }
 
   if (module_fp == NULL)