void luaK_posfix (FuncState *fs, BinOpr op,
expdesc *e1, expdesc *e2, int line) {
switch (op) {
case OPR_AND: {
lua_assert(e1->t == NO_JUMP); /* list must be closed */
luaK_dischargevars(fs, e2);
luaK_concat(fs, &e2->f, e1->f);
*e1 = *e2;
break;
}
case OPR_OR: {
lua_assert(e1->f == NO_JUMP); /* list must be closed */
luaK_dischargevars(fs, e2);
luaK_concat(fs, &e2->t, e1->t);
*e1 = *e2;
break;
}
case OPR_CONCAT: {
luaK_exp2val(fs, e2);
if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
lua_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);
freeexp(fs, e1);
SETARG_B(getcode(fs, e2), e1->u.info);
e1->k = VRELOCABLE; e1->u.info = e2->u.info;
}
else {
luaK_exp2nextreg(fs, e2); /* operand must be on the 'stack' */
codearith(fs, OP_CONCAT, e1, e2, line);
}
break;
}
case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
case OPR_IDIV: case OPR_MOD: case OPR_POW:
case OPR_BAND: case OPR_BOR: case OPR_BXOR:
case OPR_SHL: case OPR_SHR: {
codearith(fs, cast(OpCode, (op - OPR_ADD) + OP_ADD), e1, e2, line);
break;
}
case OPR_EQ: case OPR_LT: case OPR_LE: {
codecomp(fs, cast(OpCode, op - OPR_EQ + OP_EQ), 1, e1, e2);
break;
}
case OPR_NE: case OPR_GT: case OPR_GE: {
codecomp(fs, cast(OpCode, op - OPR_NE + OP_EQ), 0, e1, e2);
break;
}
default: lua_assert(0);
}
}
static void prefixexp (LexState *ls, expdesc *v) {
/* prefixexp -> NAME | '(' expr ')' */
switch (ls->t.token) {
case '(': {
int line = ls->linenumber;
next(ls);
expr(ls, v);
check_match(ls, ')', '(', line);
luaK_dischargevars(ls->fs, v);
return;
}
case TK_NAME: {
singlevar(ls, v, 1);
return;
}
#ifdef LUA_COMPATUPSYNTAX
case '%': { /* for compatibility only */
TString *varname;
int line = ls->linenumber;
next(ls); /* skip `%' */
varname = singlevar(ls, v, 1);
if (v->k != VUPVAL)
luaX_errorline(ls, "global upvalues are obsolete",
getstr(varname), line);
return;
}
#endif
default: {
luaX_syntaxerror(ls, "unexpected symbol");
return;
}
}
}
static void prefixexp(LexState* ls, expdesc* v)
{
/* prefixexp -> NAME | '(' expr ')' */
switch (ls->t.token)
{
case '(':
{
int line = ls->linenumber;
luaX_next(ls);
expr(ls, v);
check_match(ls, ')', '(', line);
luaK_dischargevars(ls->fs, v);
return;
}
case TK_NAME:
{
singlevar(ls, v);
return;
}
default:
{
luaX_syntaxerror(ls, "unexpected symbol");
return;
}
}
}
static void codenot (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
switch (e->k) {
case VNIL: case VFALSE: {
e->k = VTRUE;
break;
}
case VK: case VKFLT: case VKINT: case VTRUE: {
e->k = VFALSE;
break;
}
case VJMP: {
invertjump(fs, e);
break;
}
case VRELOCABLE:
case VNONRELOC: {
discharge2anyreg(fs, e);
freeexp(fs, e);
e->u.info = luaK_codeABC(fs, OP_NOT, 0, e->u.info, 0);
e->k = VRELOCABLE;
break;
}
default: {
lua_assert(0); /* cannot happen */
break;
}
}
/* interchange true and false lists */
{ int temp = e->f; e->f = e->t; e->t = temp; }
}
int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
if (e->k == VNONRELOC) {
if (!hasjumps(e)) return e->u.info; /* exp is already in a register */
if (e->u.info >= fs->nlocvars) { /* reg. is not a local? */
exp2reg(fs, e, e->u.info); /* put value on it */
return e->u.info;
}
}
luaK_exp2nextreg(fs, e); /* default */
return e->u.info;
}
static void discharge2reg(FuncState *fs, expdesc *e, int reg)
{
luaK_dischargevars(fs, e);
switch (e->k)
{
case VNIL: {
luaK_nil(fs, reg, 1);
break;
}
case VFALSE:
case VTRUE: {
luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
break;
}
case VK: {
luaK_codek(fs, reg, e->u.info);
break;
}
case VKNUM: {
luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
break;
}
case VRELOCABLE: {
Instruction *pc = &getcode(fs, e);
SETARG_A(*pc, reg);
break;
}
case VNONRELOC: {
if (reg != e->u.info)
luaK_codeABC(fs, OP_MOVE, reg, e->u.info, 0);
break;
}
default: {
lua_assert(e->k == VVOID || e->k == VJMP);
return; /* nothing to do... */
}
}
e->u.info = reg;
e->k = VNONRELOC;
}
void luaK_goiffalse (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */
luaK_dischargevars(fs, e);
switch (e->k) {
case VJMP: {
pc = e->u.info;
break;
}
case VNIL: case VFALSE: {
pc = NO_JUMP; /* always false; do nothing */
break;
}
default: {
pc = jumponcond(fs, e, 1);
break;
}
}
luaK_concat(fs, &e->t, pc); /* insert last jump in `t' list */
luaK_patchtohere(fs, e->f);
e->f = NO_JUMP;
}
void luaK_goiftrue (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */
luaK_dischargevars(fs, e);
switch (e->k) {
case VJMP: {
invertjump(fs, e);
pc = e->u.info;
break;
}
case VTRUE: {
pc = NO_JUMP; /* always true; do nothing */
break;
}
default: {
pc = jumponcond(fs, e, 0);
break;
}
}
luaK_concat(fs, &e->f, pc); /* insert last jump in `f' list */
luaK_patchtohere(fs, e->t);
e->t = NO_JUMP;
}
static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
luaK_dischargevars(fs, e);
switch (e->k) {
case VNIL: {
luaK_nil(fs, reg, 1);
break;
}
case VFALSE: case VTRUE: {
luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
break;
}
case VK: {
luaK_codek(fs, reg, e->u.info);
break;
}
case VKFLT: {
luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
break;
}
case VKINT: {
luaK_codek(fs, reg, luaK_intK(fs, e->u.ival));
break;
}
case VRELOCABLE: {
Instruction *pc = &getcode(fs, e);
SETARG_A(*pc, reg);
DEBUG_EXPR(raviY_printf(fs, "discharge2reg (VRELOCABLE set arg A) %e\n", e));
DEBUG_CODEGEN(raviY_printf(fs, "[%d]* %o ; set A to %d\n", e->u.info, *pc, reg));
break;
}
case VNONRELOC: {
if (reg != e->u.info) {
/* code a MOVEI or MOVEF if the target register is a local typed variable */
int ravi_type = raviY_get_register_typeinfo(fs, reg);
switch (ravi_type) {
case RAVI_TNUMINT:
luaK_codeABC(fs, OP_RAVI_MOVEI, reg, e->u.info, 0);
break;
case RAVI_TNUMFLT:
luaK_codeABC(fs, OP_RAVI_MOVEF, reg, e->u.info, 0);
break;
case RAVI_TARRAYINT:
luaK_codeABC(fs, OP_RAVI_MOVEAI, reg, e->u.info, 0);
break;
case RAVI_TARRAYFLT:
luaK_codeABC(fs, OP_RAVI_MOVEAF, reg, e->u.info, 0);
break;
default:
luaK_codeABC(fs, OP_MOVE, reg, e->u.info, 0);
break;
}
}
break;
}
default: {
lua_assert(e->k == VVOID || e->k == VJMP);
return; /* nothing to do... */
}
}
e->u.info = reg;
e->k = VNONRELOC;
}
void luaK_exp2val (FuncState *fs, expdesc *e) {
if (hasjumps(e))
luaK_exp2anyreg(fs, e);
else
luaK_dischargevars(fs, e);
}
void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e);
freeexp(fs, e);
luaK_reserveregs(fs, 1);
exp2reg(fs, e, fs->freereg - 1);
}
