src/cpu/x86/vm/x86_32.ad

@@ -6270,10 +6270,34 @@
   ins_cost(125);
   ins_encode( bswap_long_bytes(dst) );
   ins_pipe( ialu_reg_reg);
 %}
 
+instruct bytes_reverse_char(eRegI dst) %{
+  match(Set dst (ReverseBytesC dst));
+
+  format %{ "BSWAP  $dst\n\t" 
+            "SHR    $dst,16\n\t" %}
+  ins_encode %{
+    __ bswapl($dst$$Register);
+    __ shrl($dst$$Register, 16); 
+  %}
+  ins_pipe( ialu_reg );
+%}
+
+instruct bytes_reverse_short(eRegI dst) %{
+  match(Set dst (ReverseBytesS dst));
+
+  format %{ "BSWAP  $dst\n\t" 
+            "SAR    $dst,16\n\t" %}
+  ins_encode %{
+    __ bswapl($dst$$Register);
+    __ sarl($dst$$Register, 16); 
+  %}
+  ins_pipe( ialu_reg );
+%}
+
 
 //---------- Zeros Count Instructions ------------------------------------------
 
 instruct countLeadingZerosI(eRegI dst, eRegI src, eFlagsReg cr) %{
   predicate(UseCountLeadingZerosInstruction);