This adds support for marking RL78 binaries as either supporting 32-bit

or 64-bit doubles.  It also makes the linker complain if the user attempts
to link together binaries with different sized doubles.

	* elf32-rl78.c (rl78_elf_merge_private_bfd_data): Complain if
	64-bit doubles objects mix with 32-bit doubles objects.
	(rl78_elf_print_private_bfd_data): Describe 64-bit doubles flag.

	* readelf.c (get_machine_flags): Handle RL78 64-bit doubles flag.

	* config/tc-rl78.c (enum options): Add OPTION_32BIT_DOUBLES
	and OPTION_64BIT_DOUBLES.
	(md_longopts): Add -m32bit-doubles and -m64bit-doubles.
	(md_parse_option): Parse -m32bit-doubles and -m64bit-doubles.
	(md_show_usage): Show all of the RL78 options.
	(rl78_float_cons): New static functions.
	(md_pseudo_table): Update handler for "double".

1 files changed, 30 insertions, 7 deletions

diff --git a/gas/config/tc-rl78.c b/gas/config/tc-rl78.c
index bbbf47b..0cd7e5b 100644
--- a/gas/config/tc-rl78.c
+++ b/gas/config/tc-rl78.c
@@ -282,6 +282,8 @@ enum options
 {
   OPTION_RELAX = OPTION_MD_BASE,
   OPTION_G10,
+  OPTION_32BIT_DOUBLES,
+  OPTION_64BIT_DOUBLES,
 };
 
 #define RL78_SHORTOPTS ""
@@ -292,6 +294,8 @@ struct option md_longopts[] =
 {
   {"relax", no_argument, NULL, OPTION_RELAX},
   {"mg10", no_argument, NULL, OPTION_G10},
+  {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES},
+  {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES},
   {NULL, no_argument, NULL, 0}
 };
 size_t md_longopts_size = sizeof (md_longopts);
@@ -308,6 +312,14 @@ md_parse_option (int c, char * arg ATTRIBUTE_UNUSED)
     case OPTION_G10:
       elf_flags |= E_FLAG_RL78_G10;
       return 1;
+
+    case OPTION_32BIT_DOUBLES:
+      elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES;
+      return 1;
+
+    case OPTION_64BIT_DOUBLES:
+      elf_flags |= E_FLAG_RL78_64BIT_DOUBLES;
+      return 1;
     }
   return 0;
 }
@@ -315,9 +327,12 @@ md_parse_option (int c, char * arg ATTRIBUTE_UNUSED)
 void
 md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
 {
+  fprintf (stream, _(" RL78 specific command line options:\n"));
+  fprintf (stream, _("  --mg10            Enable support for G10 variant\n"));
+  fprintf (stream, _("  --m32bit-doubles  [default]\n"));
+  fprintf (stream, _("  --m64bit-doubles\n"));
 }
 
-
 static void
 s_bss (int ignore ATTRIBUTE_UNUSED)
 {
@@ -328,15 +343,23 @@ s_bss (int ignore ATTRIBUTE_UNUSED)
   demand_empty_rest_of_line ();
 }
 
+static void
+rl78_float_cons (int ignore ATTRIBUTE_UNUSED)
+{
+  if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES)
+    return float_cons ('d');
+  return float_cons ('f');
+}
+
 /* The target specific pseudo-ops which we support.  */
 const pseudo_typeS md_pseudo_table[] =
 {
-  /* Our "standard" pseudos. */
-  { "double",   float_cons,    'd' },
-  { "bss",	s_bss, 		0 },
-  { "3byte",	cons,		3 },
-  { "int",	cons,		4 },
-  { "word",	cons,		4 },
+  /* Our "standard" pseudos.  */
+  { "double", rl78_float_cons,	'd' },
+  { "bss",    s_bss, 		0 },
+  { "3byte",  cons,		3 },
+  { "int",    cons,		4 },
+  { "word",   cons,		4 },
 
   /* End of list marker.  */
   { NULL, 	NULL, 		0 }