Bi-endian support for moxie

From-SVN: r191285

gcc/ChangeLog

+2012-09-13  Anthony Green  <green@moxielogic.com>
+
+	* config/moxie/moxie.h (LINK_SPEC): Add bi-endian support.
+	(MULTILIB_DEFAULTS): Define.
+	(ASM_SPEC): Define.
+	(BYTES_BIG_ENDIAN, WORDS_BIG_ENDIAN): Add bi-endian support.
+	(TARGET_CPU_CPP_BUILTINS): Add __MOXIE_LITTLE_ENDIAN__ and
+	__MOXIE_BIG_ENDIAN__.
+	* config/moxie/t-moxie (MULTILIB_DIRNAMES, MULTILIB_OPTIONS):
+	Define.
+	* config/moxie/moxie.opt: New file.
+	* doc/invoke.texi (Moxie Options): Add section documenting -mel
+	and -meb.
+
 2012-09-13  Paolo Carlini  <paolo.carlini@oracle.com>
 	    Manuel López-Ibáñez  <manu@gcc.gnu.org>
 

gcc/config/moxie/moxie.h

@@ -41,9 +41,13 @@
 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
 
 #undef  LINK_SPEC
-#define LINK_SPEC "%{h*} %{v:-V} \
+#define LINK_SPEC "%{h*} %{v:-V} %{!mel:-EB} %{mel:-EL}\
 		   %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}"
 
+#ifndef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS { "meb" }
+#endif
+
 /* Layout of Source Language Data Types */
 
 #define INT_TYPE_SIZE 32
@@ -192,6 +196,7 @@ enum reg_class
 /* The Overall Framework of an Assembler File */
 
 #undef  ASM_SPEC
+#define ASM_SPEC "%{!mel:-EB} %{mel:-EL}"
 #define ASM_COMMENT_START "#"
 #define ASM_APP_ON ""
 #define ASM_APP_OFF ""
@@ -291,8 +296,8 @@ enum reg_class
 /* Storage Layout */
 
 #define BITS_BIG_ENDIAN 0
-#define BYTES_BIG_ENDIAN 1
-#define WORDS_BIG_ENDIAN 1
+#define BYTES_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN )
+#define WORDS_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN )
 
 /* Alignment required for a function entry point, in bits.  */
 #define FUNCTION_BOUNDARY 16
@@ -475,6 +480,10 @@ enum reg_class
   { \
     builtin_define_std ("moxie");			\
     builtin_define_std ("MOXIE");			\
+    if (TARGET_LITTLE_ENDIAN)				\
+      builtin_define ("__MOXIE_LITTLE_ENDIAN__");	\
+    else						\
+      builtin_define ("__MOXIE_BIG_ENDIAN__");		\
   }
 
 #define HAS_LONG_UNCOND_BRANCH true

gcc/config/moxie/moxie.opt

+; Options for the moxie compiler port.
+
+; Copyright (C) 2012 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+;
+; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+; WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+; for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3.  If not see
+; <http://www.gnu.org/licenses/>.
+
+meb
+Target RejectNegative Report InverseMask(LITTLE_ENDIAN)
+Generate big-endian code
+
+mel
+Target RejectNegative Report Mask(LITTLE_ENDIAN)
+Generate little-endian code

gcc/config/moxie/t-moxie

@@ -18,3 +18,6 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
+MULTILIB_OPTIONS     = meb/mel
+MULTILIB_DIRNAMES    = eb el
+

gcc/doc/invoke.texi

@@ -776,6 +776,9 @@ Objective-C and Objective-C++ Dialects}.
 -mreturn-pointer-on-d0 @gol
 -mno-crt0  -mrelax -mliw -msetlb}
 
+@emph{Moxie Options}
+@gccoptlist{-meb  -mel}
+
 @emph{PDP-11 Options}
 @gccoptlist{-mfpu  -msoft-float  -mac0  -mno-ac0  -m40  -m45  -m10 @gol
 -mbcopy  -mbcopy-builtin  -mint32  -mno-int16 @gol
@@ -10529,6 +10532,7 @@ platform.
 * MIPS Options::
 * MMIX Options::
 * MN10300 Options::
+* Moxie Options::
 * PDP-11 Options::
 * picoChip Options::
 * PowerPC Options::
@@ -16448,6 +16452,23 @@ instructions.  This option defines the preprocessor macro
 
 @end table
 
+@node Moxie Options
+@subsection Moxie Options
+@cindex Moxie Options
+
+@table @gcctabopt
+
+@item -meb
+@opindex meb
+Generate big-endian code.  This is the default for @samp{moxie-*-*}
+configurations.
+
+@item -mel
+@opindex mel
+Generate little-endian code.
+
+@end table
+
 @node PDP-11 Options
 @subsection PDP-11 Options
 @cindex PDP-11 Options