opensources
/
lua
mirror of https://github.com/lua/lua.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

small optimization for boolean constants + new format for SETLIST opcode

v5-2
Roberto Ierusalimschy 20 years ago
parent
5d834bdf57
commit
5ee87acd6b
6 changed files with 50 additions and 29 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 29
      lcode.c
  2. 3
      lcode.h
  3. 6
      lopcodes.c
  4. 13
      lopcodes.h
  5. 10
      lparser.c
  6. 18
      lvm.c

29
lcode.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lcode.c,v 2.5 2004/07/16 13:30:53 roberto Exp roberto $
** $Id: lcode.c,v 2.6 2004/08/24 20:09:11 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
@ -243,7 +243,14 @@ int luaK_numberK (FuncState *fs, lua_Number r) {
}
static int nil_constant (FuncState *fs) {
static int boolK (FuncState *fs, int b) {
TValue o;
setbvalue(&o, b);
return addk(fs, &o, &o);
}
static int nilK (FuncState *fs) {
TValue k, v;
setnilvalue(&v);
/* cannot use nil as key; instead use table itself to represent nil */
@ -417,9 +424,11 @@ void luaK_exp2val (FuncState *fs, expdesc *e) {
int luaK_exp2RK (FuncState *fs, expdesc *e) {
luaK_exp2val(fs, e);
switch (e->k) {
case VTRUE:
case VFALSE:
case VNIL: {
if (fs->nk <= MAXINDEXRK) { /* constant fit in RK operand? */
e->info = nil_constant(fs);
e->info = (e->k == VNIL) ? nilK(fs) : boolK(fs, (e->k == VTRUE));
e->k = VK;
return RKASK(e->info);
}
@ -735,3 +744,17 @@ int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
}
void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) {
int c = (nelems - 1)/LFIELDS_PER_FLUSH + 1;
int b = (tostore == LUA_MULTRET) ? 0 : tostore;
lua_assert(tostore != 0);
if (c <= MAXARG_C)
luaK_codeABC(fs, OP_SETLIST, base, b, c);
else {
luaK_codeABC(fs, OP_SETLIST, base, b, 0);
luaK_code(fs, cast(Instruction, c), fs->ls->lastline);
}
fs->freereg = base + 1; /* free registers with list values */
}

3
lcode.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lcode.h,v 1.38 2002/12/11 12:34:22 roberto Exp roberto $
** $Id: lcode.h,v 1.39 2004/05/31 18:51:50 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
@ -72,6 +72,7 @@ int luaK_getlabel (FuncState *fs);
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v);
void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
#endif

6
lopcodes.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lopcodes.c,v 1.27 2004/05/31 18:51:50 roberto Exp roberto $
** $Id: lopcodes.c,v 1.28 2004/07/16 13:15:32 roberto Exp $
** See Copyright Notice in lua.h
*/
@ -49,7 +49,6 @@ const char *const luaP_opnames[NUM_OPCODES] = {
"TFORLOOP",
"TFORPREP",
"SETLIST",
"SETLISTO",
"CLOSE",
"CLOSURE",
"VARARG"
@ -92,8 +91,7 @@ const lu_byte luaP_opmodes[NUM_OPCODES] = {
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORPREP */
,opmode(1, 0, OpArgN, OpArgU, iABC) /* OP_TFORLOOP */
,opmode(0, 0, OpArgR, OpArgN, iAsBx) /* OP_TFORPREP */
,opmode(0, 0, OpArgU, OpArgN, iABx) /* OP_SETLIST */
,opmode(0, 0, OpArgU, OpArgN, iABx) /* OP_SETLISTO */
,opmode(0, 0, OpArgU, OpArgU, iABC) /* OP_SETLIST */
,opmode(0, 0, OpArgN, OpArgN, iABC) /* OP_CLOSE */
,opmode(0, 1, OpArgU, OpArgN, iABx) /* OP_CLOSURE */
,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_VARARG */

13
lopcodes.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lopcodes.h,v 1.110 2004/06/29 18:49:02 roberto Exp roberto $
** $Id: lopcodes.h,v 1.111 2004/08/04 20:18:13 roberto Exp $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
@ -198,8 +198,7 @@ OP_TFORLOOP,/* A C R(A+2), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));
OP_TFORPREP,/* A sBx if type(R(A)) == table then R(A+1):=R(A), R(A):=next;
pc+=sBx */
OP_SETLIST,/* A Bx R(A)[Bx-Bx%FPF+i] := R(A+i), 1 <= i <= Bx%FPF+1 */
OP_SETLISTO,/* A Bx */
OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */
OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/
OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n)) */
@ -219,11 +218,15 @@ OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'.
(*) In OP_VARARG, if (B == 0) then use actual number of varargs and
set top (like in OP_CALL).
set top (like in OP_CALL with C == 0).
(*) In OP_RETURN, if (B == 0) then return up to `top'
(*) For comparisons, B specifies what conditions the test should accept.
(*) In OP_SETLIST, if (B == 0) then B = `top';
if (C == 0) then next `instruction' is real C
(*) For comparisons, A specifies what condition the test should accept
(true or false).
(*) All `skips' (pc++) assume that next instruction is a jump
===========================================================================*/

10
lparser.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lparser.c,v 2.4 2004/04/30 20:13:38 roberto Exp roberto $
** $Id: lparser.c,v 2.5 2004/05/31 18:51:50 roberto Exp $
** Lua Parser
** See Copyright Notice in lua.h
*/
@ -475,9 +475,8 @@ static void closelistfield (FuncState *fs, struct ConsControl *cc) {
luaK_exp2nextreg(fs, &cc->v);
cc->v.k = VVOID;
if (cc->tostore == LFIELDS_PER_FLUSH) {
luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1); /* flush */
luaK_setlist(fs, cc->t->info, cc->na, cc->tostore); /* flush */
cc->tostore = 0; /* no more items pending */
fs->freereg = cc->t->info + 1; /* free registers */
}
}
@ -486,15 +485,14 @@ static void lastlistfield (FuncState *fs, struct ConsControl *cc) {
if (cc->tostore == 0) return;
if (hasmultret(cc->v.k)) {
luaK_setmultret(fs, &cc->v);
luaK_codeABx(fs, OP_SETLISTO, cc->t->info, cc->na-1);
luaK_setlist(fs, cc->t->info, cc->na, LUA_MULTRET);
cc->na--; /* do not count last expression (unknown number of elements) */
}
else {
if (cc->v.k != VVOID)
luaK_exp2nextreg(fs, &cc->v);
luaK_codeABx(fs, OP_SETLIST, cc->t->info, cc->na-1);
luaK_setlist(fs, cc->t->info, cc->na, cc->tostore);
}
fs->freereg = cc->t->info + 1; /* free registers */
}

18
lvm.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 2.13 2004/08/12 14:19:51 roberto Exp roberto $
** $Id: lvm.c,v 2.14 2004/09/15 20:39:42 roberto Exp $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@ -710,21 +710,19 @@ StkId luaV_execute (lua_State *L, int nexeccalls) {
dojump(L, pc, GETARG_sBx(i));
continue;
}
case OP_SETLIST:
case OP_SETLISTO: {
int bc = GETARG_Bx(i);
int n, last;
case OP_SETLIST: {
int n = GETARG_B(i);
int c = GETARG_C(i);
int last;
Table *h;
runtime_check(L, ttistable(ra));
h = hvalue(ra);
if (GET_OPCODE(i) == OP_SETLIST)
n = (bc&(LFIELDS_PER_FLUSH-1)) + 1;
else {
if (n == 0) {
n = L->top - ra - 1;
L->top = L->ci->top;
}
bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */
last = bc + n + LUA_FIRSTINDEX - 1;
if (c == 0) c = cast(int, *pc++);
last = ((c-1)*LFIELDS_PER_FLUSH) + n + LUA_FIRSTINDEX - 1;
if (last > h->sizearray) /* needs more space? */
luaH_resize(L, h, last, h->lsizenode); /* pre-alloc it at once */
for (; n > 0; n--) {

Write Preview
Loading…
Cancel
Save