doc update

README.rst

@@ -192,6 +192,19 @@ Ravi should be able to run all Lua 5.3 programs in interpreted mode. When JIT co
 * ``pairs()`` and ``ipairs()`` work on Ravi arrays since release 0.4 but more testing needed (issues 24 and 25)
 * Upvalues cannot subvert the static typing of local variables since release 0.4 but more testing is needed (issue 26)
 * Lua C API may not work correctly for Ravi arrays, although some initial work has been done in this area (issue 9)
+* Certain Lua limits are reduced due to changed byte code structure. These are described below.
+
++-----------------+-------------+-------------+
+| Limit name      | Lua value   | Ravi value  |
++=================+=============+=============+
+| MAXUPVAL        | 255         | 125         |
++-----------------+-------------+-------------+
+| LUAI_MAXCCALLS  | 200         | 125         |
++-----------------+-------------+-------------+
+| MAXREGS         | 255         | 125         |
++-----------------+-------------+-------------+
+| MAXVARS         | 200         | 125         |
++-----------------+-------------+-------------+
 
 Build Dependencies - LLVM version
 ---------------------------------

lua-5.3.0-tests/calls.lua

@@ -322,7 +322,7 @@ assert(x() == 24)
 
 -- test for dump/undump with many upvalues
 do
-  local nup = 124 -- RAVI change; was 200    -- maximum number of local variables
+  local nup = 123 -- RAVI change; was 200    -- maximum number of local variables
   local prog = {"local a1"}
   for i = 2, nup do prog[#prog + 1] = ", a" .. i end
   prog[#prog + 1] = " = 1"

readthedocs/ravi-overview.rst

@@ -199,11 +199,11 @@ Ravi should be able to run all Lua 5.3 programs in interpreted mode. When JIT co
 +=================+=============+=============+
 | MAXUPVAL        | 255         | 125         |
 +-----------------+-------------+-------------+
-| LUAI_MAXCCALLS  | 125         | 200         |
+| LUAI_MAXCCALLS  | 200         | 125         |
 +-----------------+-------------+-------------+
-| MAXREGS         | 127         | 255         |
+| MAXREGS         | 255         | 125         |
 +-----------------+-------------+-------------+
-| MAXVARS         | 125         | 200         |
+| MAXVARS         | 200         | 125         |
 +-----------------+-------------+-------------+
 
 Build Dependencies - LLVM version

src/lcode.c

@@ -30,7 +30,7 @@
 
 
 /* Maximum number of registers in a Lua function (must fit in operand A) */
-#define MAXREGS		MAXARG_A
+#define MAXREGS		125
 /* RAVI change; #define MAXREGS		255 */