libcpp/ChangeLog:

	* include/cpplib.h (CPP_N_WIDTH_MD, CPP_N_MD_W, CPP_N_MD_Q):
	Add new constants.
	* expr.c (interpret_float_suffix): Process 'w', 'W', 'q' and 'Q'
	suffixes.  Return CPP_N_MD_W for 'w' or 'W' suffixes and CPP_N_MD_Q
	for 'q' or 'Q' suffixes.

gcc/ChangeLog:

	* targhooks.h (default_mode_for_suffix): New function declaration.
	* targhooks.c (default_mode_for_suffix): New default target hook.
	* target.h (struct c): New structure in the targetm struct.
	(mode_for_suffix): New target hook as part of struct c.
	target-def.h (TARGET_C_MODE_FOR_SUFFIX): Define as
	default_mode_for_suffix.
	(TARGET_C): New define.
	* c-lex.c: Include "target.h".
	(interpret_float): Use targetm.c.mode_for_suffix to determine
	the mode for a given non-standard suffix.
	Makefile.in (c-lex.o): Depend on $(TARGET_H).

	* config/i386/i386.c (ix86_c_mode_for_suffix): New static function.
	(TARGET_C_MODE_FOR_SUFFIX): Define to ix86_c_mode_for_suffix.

	* doc/extend.texi (Floating Types): New node.  Document __float80 and
	__float128 types.  Document 'w', 'W', 'q' and 'Q' suffixes.

testsuite/ChangeLog:

	* gcc.dg/const-float80.c : New test.
	* gcc.dg/const-float128.c : New test.
	* gcc.dg/const-float80-ped.c : New test.
	* gcc.dg/const-float128-ped.c : New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@126244 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 27 insertions, 2 deletions

diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index a89643c6046..ff8eee6baec 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -41,6 +41,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 #include "tm_p.h"
 #include "splay-tree.h"
 #include "debug.h"
+#include "target.h"
 
 /* We may keep statistics about how long which files took to compile.  */
 static int header_time, body_time;
@@ -649,7 +650,31 @@ interpret_float (const cpp_token *token, unsigned int flags)
     else
       type = dfloat64_type_node;
   else
-    if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
+    if (flags & CPP_N_WIDTH_MD)
+      {
+	char suffix;
+	enum machine_mode mode;
+
+	if ((flags & CPP_N_WIDTH_MD) == CPP_N_MD_W)
+	  suffix = 'w';
+	else
+	  suffix = 'q';
+
+	mode = targetm.c.mode_for_suffix (suffix);
+	if (mode == VOIDmode)
+	  {
+	    error ("unsupported non-standard suffix on floating constant");
+	    errorcount++;
+
+	    return error_mark_node;
+	  }
+	else if (pedantic)
+	  pedwarn ("non-standard suffix on floating constant");
+
+	type = c_common_type_for_mode (mode, 0);
+	gcc_assert (type);
+      }
+    else if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
       type = long_double_type_node;
     else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL
 	     || flag_single_precision_constant)
@@ -666,7 +691,7 @@ interpret_float (const cpp_token *token, unsigned int flags)
   else 
     {
       if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM)
-	/* Must be an F or L suffix.  */
+	/* Must be an F or L or machine defined suffix.  */
 	copylen--;
       if (flags & CPP_N_IMAGINARY)
 	/* I or J suffix.  */