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new implementation for the Virtual Machine

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This commit is contained in:
Roberto Ierusalimschy
2001-06-05 15:17:01 -03:00
parent 572a69b6af
commit 762d059a13
15 changed files with 1696 additions and 1538 deletions
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32
lparser.h
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@@ -1,5 +1,5 @@
/*
** $Id: lparser.h,v 1.29 2000/12/28 12:55:41 roberto Exp roberto $
** $Id: lparser.h,v 1.30 2001/02/20 18:28:11 roberto Exp roberto $
** LL(1) Parser and code generator for Lua
** See Copyright Notice in lua.h
*/
@@ -16,25 +16,32 @@
*/
typedef enum {
VGLOBAL,
VLOCAL,
VINDEXED,
VEXP
VVOID, /* no value */
VNIL,
VNUMBER, /* n = value */
VK, /* info = index of constant in `k' */
VGLOBAL, /* info = index of global name in `k' */
VLOCAL, /* info = local register */
VINDEXED, /* info = table register; aux = index register (or `k') */
VRELOCABLE, /* info = instruction pc */
VNONRELOC, /* info = result register */
VJMP, /* info = result register */
VCALL /* info = result register */
} expkind;
typedef struct expdesc {
expkind k;
union {
int index; /* VGLOBAL: `kstr' index of global name; VLOCAL: stack index */
struct {
int t; /* patch list of `exit when true' */
int f; /* patch list of `exit when false' */
} l;
int info, aux;
} i;
lua_Number n;
} u;
int t; /* patch list of `exit when true' */
int f; /* patch list of `exit when false' */
} expdesc;
/* state needed to generate code for a given function */
typedef struct FuncState {
Proto *f; /* current function header */
@@ -44,10 +51,9 @@ typedef struct FuncState {
int pc; /* next position to code (equivalent to `ncode') */
int lasttarget; /* `pc' of last `jump target' */
int jlt; /* list of jumps to `lasttarget' */
int stacklevel; /* number of values on activation register */
int nkstr; /* number of elements in `kstr' */
int freereg; /* first free register */
int nk; /* number of elements in `k' */
int nkproto; /* number of elements in `kproto' */
int nknum; /* number of elements in `knum' */
int nlineinfo; /* number of elements in `lineinfo' */
int nlocvars; /* number of elements in `locvars' */
int nactloc; /* number of active local variables */