65802 JITC placeholders

src/libsrc/apple/jit16.pla

@@ -0,0 +1,51 @@
+//
+// PLASMA JIT bytecode compiler
+//
+include "inc/cmdsys.plh"
+//
+// Module don't free memory
+//
+const modkeep     = $2000
+const modinitkeep = $4000
+//
+// Indirect interpreter DEFinition entrypoint
+//
+struc t_defentry
+    byte interpjsr
+    word interpaddr
+    word bytecodeaddr
+    byte callcount
+    byte bytecodesize
+end
+//
+// JIT compiler constants
+//
+const jitcomp     = $03E2
+const jitcodeptr  = $03E4
+const codemax     = $BEE0
+//
+// Bytecode interpreter entrypoints
+//
+const indirectentry = $03DC
+const directentry   = $03D0
+//
+// Copy bytecode DEF to main memory
+//
+def defcpy(dst, defptr)#0
+    *$003C   = defptr=>bytecodeaddr
+    *$003E   = *$003C + defptr->bytecodesize
+    *$0042   = dst
+    call($C311, 0, 0, 0, $04) // CALL XMOVE with carry clear (AUX->MAIN) and ints disabled
+end
+include "libsrc/jitcore.pla"
+//
+// Install JIT compiler
+//
+if *jitcomp
+    return 0
+fin
+*jitcomp        = @compiler
+cmdsys.jitcount = 44
+cmdsys.jitsize  = 96
+return modkeep
+done