risugen, risugen_ppc64.pm: Add support ppc64 (big-endian)

This commit adds an option to risugen in order to give the opportunity
to generated big-endian instructions. By passing --be, users force
risugen to generated big-endian instructions for ppc64.

./risugen --be --numinsns 1000 --pattern "ADD" ppc64.risu test.bin
./risugen --numinsns 1000 --pattern "ADD" ppc64.risu test.bin

Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Message-id: 1495739423-32326-4-git-send-email-joserz@linux.vnet.ibm.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/risugen b/risugen
index 6aad626..8b20425 100755
--- a/risugen
+++ b/risugen
@@ -264,6 +264,7 @@ Valid options:
                    a general set you have excluded.
      --no-fp      : disable floating point: no fp init, randomization etc.
                    Useful to test before support for FP is available.
+    --be         : generate instructions in Big-Endian byte order (ppc64 only).
     --help       : print this message
 EOT
 }
@@ -274,6 +275,7 @@ sub main()
     my $condprob = 0;
     my $fpscr = 0;
     my $fp_enabled = 1;
+    my $big_endian = 0;
     my ($infile, $outfile);
 
     GetOptions( "help" => sub { usage(); exit(0); },
@@ -287,6 +289,7 @@ sub main()
                         die "Value \"$condprob\" invalid for option condprob (must be between 0 and 1)\n";
                     }
                 },
+                "be" => sub { $big_endian = 1; },
                 "no-fp" => sub { $fp_enabled = 0; },
         ) or return 1;
     # allow "--pattern re,re" and "--pattern re --pattern re"
@@ -317,7 +320,8 @@ sub main()
         'not_pattern_re' => \@not_pattern_re,
         'details' => \%insn_details,
         'arch' => $full_arch[0],
-        'subarch' => $full_arch[1] || ''
+        'subarch' => $full_arch[1] || '',
+        'bigendian' => $big_endian
     );
 
     write_test_code(\%params);