Update Lua code for 16-bit compiler compatibility

Removed old patches and added a new patch file that modifieds Luas source code with conditional macros to address limitations and bugs in 16-bit compilers. If fixes the problem by bypassing several true mathematical checks in favor of the '_M_I86' definition. This ensures proper handling of integer size checks, UTF-8 decoding, and macro definitions for these environments while hopefully maintaining compatibility for building Lua on modern systems.

Author: Lethja

lopcodes.pat

@@ -0,0 +1,71 @@
+--- lua/lopcodes.h
++++ lua/lopcodes.h
+@@ -65,10 +65,16 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
+ */
+ 
+ /* Check whether type 'int' has at least 'b' bits ('b' < 32) */
++#if defined(_M_I86)
++/* Hardcoded due to bugs in some 16-bit compilers */
++#define L_INTHASBITS(b)     ((0xFFFF >> ((b) - 1)) >= 1)
++#else
+ #define L_INTHASBITS(b)		((UINT_MAX >> ((b) - 1)) >= 1)
++#endif
+ 
+-
+-#if L_INTHASBITS(SIZE_Bx)
++#if defined(_M_I86)
++#define MAXARG_Bx	0xFFFF
++#elif L_INTHASBITS(SIZE_Bx)
+ #define MAXARG_Bx	((1<<SIZE_Bx)-1)
+ #else
+ #define MAXARG_Bx	MAX_INT
+@@ -76,14 +82,17 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
+ 
+ #define OFFSET_sBx	(MAXARG_Bx>>1)         /* 'sBx' is signed */
+ 
+-
+-#if L_INTHASBITS(SIZE_Ax)
++#if defined(_M_I86)
++#define MAXARG_Ax	0xFFFF
++#elif L_INTHASBITS(SIZE_Ax)
+ #define MAXARG_Ax	((1<<SIZE_Ax)-1)
+ #else
+ #define MAXARG_Ax	MAX_INT
+ #endif
+ 
+-#if L_INTHASBITS(SIZE_sJ)
++#if defined(_M_I86)
++#define MAXARG_sJ	0xFFFF
++#elif L_INTHASBITS(SIZE_sJ)
+ #define MAXARG_sJ	((1 << SIZE_sJ) - 1)
+ #else
+ #define MAXARG_sJ	MAX_INT
+--- lua/luaconf.h
++++ lua/luaconf.h
+@@ -79,7 +79,12 @@
+ /*
+ @@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits.
+ */
++#if defined(_M_I86)
++/* Hardcoded due to bugs in some 16-bit compilers */
++#define LUAI_IS32INT 0
++#else
+ #define LUAI_IS32INT	((UINT_MAX >> 30) >= 3)
++#endif
+ 
+ /* }================================================================== */
+ 
+
+--- lua/lutf8lib.c
++++ lua/lutf8lib.c
+@@ -31,7 +31,9 @@
+ /*
+ ** Integer type for decoded UTF-8 values; MAXUTF needs 31 bits.
+ */
+-#if (UINT_MAX >> 30) >= 1
++#if defined(_M_I86)
++typedef unsigned long utfint;
++#elif (UINT_MAX >> 30) >= 1
+ typedef unsigned int utfint;
+ #else
+ typedef unsigned long utfint;