GP-4319 updated calling convention with larger sizes and allow floats

Author: emteere

Ghidra/Processors/tricore/data/languages/tricore.cspec

@@ -33,6 +33,12 @@
   </returnaddress>
 
   <stackpointer register="a10" space="ram"/>
+  
+  <prefersplit style="inhalf">
+    <register name="e4"/>
+    <register name="e6"/>
+  </prefersplit>
+    
   <default_proto>
     <prototype name="__stdcall" extrapop="0" stackshift="0">
       <input>
@@ -51,34 +57,41 @@
           <pentry minsize="4" maxsize="4" metatype="ptr">
               <register name="a7"/>
           </pentry>
-          <pentry minsize="1" maxsize="4" extension="inttype">   <!-- This is the first non pointer -->
+          <pentry minsize="1" maxsize="4">   <!-- This is the first non pointer -->
               <register name="d4"/>
           </pentry>
-          <pentry minsize="1" maxsize="4" extension="inttype">
+          <pentry minsize="1" maxsize="4">
               <register name="d5"/>
           </pentry>
-          <pentry minsize="1" maxsize="4" extension="inttype">
+          <pentry minsize="5" maxsize="8">    <!-- This is the first >4 byte non pointer -->
+              <register name="e4"/>
+          </pentry>
+          <pentry minsize="1" maxsize="4">
               <register name="d6"/>
           </pentry>
-          <pentry minsize="1" maxsize="4" extension="inttype">
+          <pentry minsize="1" maxsize="4">
               <register name="d7"/>
           </pentry>
-          <pentry minsize="5" maxsize="8">    <!-- This is the first >4 byte non pointer -->
-              <register name="e4"/>
-          </pentry>
           <pentry minsize="5" maxsize="8">
               <register name="e6"/>
           </pentry>
           <pentry minsize="1" maxsize="500" align="4">
               <addr offset="0" space="stack"/>
           </pentry>
+          <rule>
+             <datatype name="struct" minsize="17"/>
+             <convert_to_ptr/>
+          </rule>
       </input>
 
       <output>
         <pentry minsize="4" maxsize="4" metatype="ptr">
           <register name="a2"/>
         </pentry>
-        <pentry minsize="1" maxsize="8" extension="inttype">
+        <pentry minsize="1" maxsize="4">
+          <register name="d2"/>
+        </pentry>        
+        <pentry minsize="5" maxsize="8">
           <register name="e2"/>
         </pentry>
       </output>