Added support in gas for mlittle-endian and mbig-endian flags as options.

Updated show usage for MicroBlaze specific assembler options
to include new entries.

This patch has been tested for years of AMD Xilinx Yocto
releases as part of the following patch set:

https://github.com/Xilinx/meta-xilinx/tree/master/meta-microblaze/recipes-devtools/binutils/binutils

Signed-off-by: nagaraju <nagaraju.mekala@amd.com>
Signed-off-by: Neal Frager <neal.frager@amd.com>

---
V1->V2:
 - removed new options which were unnecessary
 - added documentation for MicroBlaze specific options

Signed-off-by: Michael J. Eager <eager@eagercon.com>

gas/config/tc-microblaze.c

@@ -1854,6 +1854,8 @@ struct option md_longopts[] =
 {
   {"EB", no_argument, NULL, OPTION_EB},
   {"EL", no_argument, NULL, OPTION_EL},
+  {"mlittle-endian", no_argument, NULL, OPTION_EL},
+  {"mbig-endian", no_argument, NULL, OPTION_EB},
   { NULL,          no_argument, NULL, 0}
 };
 
@@ -2524,6 +2526,9 @@ md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
   /*  fprintf(stream, _("\
       MicroBlaze options:\n\
       -noSmall         Data in the comm and data sections do not go into the small data section\n")); */
+  fprintf (stream, _(" MicroBlaze specific assembler options:\n"));
+  fprintf (stream, "  -%-23s%s\n", "mbig-endian", N_("assemble for a big endian cpu"));
+  fprintf (stream, "  -%-23s%s\n", "mlittle-endian", N_("assemble for a little endian cpu"));      
 }
 
 

gas/doc/as.texi

@@ -439,7 +439,7 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
 @end ifset
 @ifset MICROBLAZE
 @emph{Target MICROBLAZE options:}
-@c MicroBlaze has no machine-dependent assembler options.
+   [@b{-mlittle-endian}] [@b{-mbig-endian}]
 @end ifset
 @ifset MIPS
 

gas/doc/c-microblaze.texi

@@ -22,6 +22,7 @@ Reference Guide (UG081)} available at www.xilinx.com.
 @menu
 * MicroBlaze Directives::           Directives for MicroBlaze Processors.
 * MicroBlaze Syntax::               Syntax for the MicroBlaze
+* MicroBlaze Options::              Options for MicroBlaze Processors.
 @end menu
 
 @node MicroBlaze Directives
@@ -97,3 +98,18 @@ preprocessor control command (@pxref{Preprocessing}).
 @cindex MicroBlaze line separator
 The @samp{;} character can be used to separate statements on the same
 line.
+
+@node MicroBlaze Options
+@section Options
+
+MicroBlaze processors support the following options:
+
+@cindex MicroBlaze Options
+
+@table @code
+@item -mbig-endian
+Build for MicroBlaze in Big Endian configuration.
+
+@item -mlittle-endian
+Build for MicroBlaze in Little Endian configuration.
+@end table