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Update to Lua 5.4.6

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This commit is contained in:
Jeremy Baxter 2023-07-30 09:57:45 +12:00
parent 57a4014981
commit 8e20d1e382
40 changed files with 997 additions and 733 deletions
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137
lua-5.4/lcode.c
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@ -1351,6 +1351,35 @@ static int constfolding (FuncState *fs, int op, expdesc *e1,
}
/*
** Convert a BinOpr to an OpCode (ORDER OPR - ORDER OP)
*/
l_sinline OpCode binopr2op (BinOpr opr, BinOpr baser, OpCode base) {
lua_assert(baser <= opr &&
((baser == OPR_ADD && opr <= OPR_SHR) ||
(baser == OPR_LT && opr <= OPR_LE)));
return cast(OpCode, (cast_int(opr) - cast_int(baser)) + cast_int(base));
}
/*
** Convert a UnOpr to an OpCode (ORDER OPR - ORDER OP)
*/
l_sinline OpCode unopr2op (UnOpr opr) {
return cast(OpCode, (cast_int(opr) - cast_int(OPR_MINUS)) +
cast_int(OP_UNM));
}
/*
** Convert a BinOpr to a tag method (ORDER OPR - ORDER TM)
*/
l_sinline TMS binopr2TM (BinOpr opr) {
lua_assert(OPR_ADD <= opr && opr <= OPR_SHR);
return cast(TMS, (cast_int(opr) - cast_int(OPR_ADD)) + cast_int(TM_ADD));
}
/*
** Emit code for unary expressions that "produce values"
** (everything but 'not').
@ -1389,12 +1418,15 @@ static void finishbinexpval (FuncState *fs, expdesc *e1, expdesc *e2,
** Emit code for binary expressions that "produce values" over
** two registers.
*/
static void codebinexpval (FuncState *fs, OpCode op,
static void codebinexpval (FuncState *fs, BinOpr opr,
expdesc *e1, expdesc *e2, int line) {
int v2 = luaK_exp2anyreg(fs, e2); /* both operands are in registers */
OpCode op = binopr2op(opr, OPR_ADD, OP_ADD);
int v2 = luaK_exp2anyreg(fs, e2); /* make sure 'e2' is in a register */
/* 'e1' must be already in a register or it is a constant */
lua_assert((VNIL <= e1->k && e1->k <= VKSTR) ||
e1->k == VNONRELOC || e1->k == VRELOC);
lua_assert(OP_ADD <= op && op <= OP_SHR);
finishbinexpval(fs, e1, e2, op, v2, 0, line, OP_MMBIN,
cast(TMS, (op - OP_ADD) + TM_ADD));
finishbinexpval(fs, e1, e2, op, v2, 0, line, OP_MMBIN, binopr2TM(opr));
}
@ -1410,6 +1442,18 @@ static void codebini (FuncState *fs, OpCode op,
}
/*
** Code binary operators with K operand.
*/
static void codebinK (FuncState *fs, BinOpr opr,
expdesc *e1, expdesc *e2, int flip, int line) {
TMS event = binopr2TM(opr);
int v2 = e2->u.info; /* K index */
OpCode op = binopr2op(opr, OPR_ADD, OP_ADDK);
finishbinexpval(fs, e1, e2, op, v2, flip, line, OP_MMBINK, event);
}
/* Try to code a binary operator negating its second operand.
** For the metamethod, 2nd operand must keep its original value.
*/
@ -1437,24 +1481,27 @@ static void swapexps (expdesc *e1, expdesc *e2) {
}
/*
** Code binary operators with no constant operand.
*/
static void codebinNoK (FuncState *fs, BinOpr opr,
expdesc *e1, expdesc *e2, int flip, int line) {
if (flip)
swapexps(e1, e2); /* back to original order */
codebinexpval(fs, opr, e1, e2, line); /* use standard operators */
}
/*
** Code arithmetic operators ('+', '-', ...). If second operand is a
** constant in the proper range, use variant opcodes with K operands.
*/
static void codearith (FuncState *fs, BinOpr opr,
expdesc *e1, expdesc *e2, int flip, int line) {
TMS event = cast(TMS, opr + TM_ADD);
if (tonumeral(e2, NULL) && luaK_exp2K(fs, e2)) { /* K operand? */
int v2 = e2->u.info; /* K index */
OpCode op = cast(OpCode, opr + OP_ADDK);
finishbinexpval(fs, e1, e2, op, v2, flip, line, OP_MMBINK, event);
}
else { /* 'e2' is neither an immediate nor a K operand */
OpCode op = cast(OpCode, opr + OP_ADD);
if (flip)
swapexps(e1, e2); /* back to original order */
codebinexpval(fs, op, e1, e2, line); /* use standard operators */
}
if (tonumeral(e2, NULL) && luaK_exp2K(fs, e2)) /* K operand? */
codebinK(fs, opr, e1, e2, flip, line);
else /* 'e2' is neither an immediate nor a K operand */
codebinNoK(fs, opr, e1, e2, flip, line);
}
@ -1471,35 +1518,27 @@ static void codecommutative (FuncState *fs, BinOpr op,
flip = 1;
}
if (op == OPR_ADD && isSCint(e2)) /* immediate operand? */
codebini(fs, cast(OpCode, OP_ADDI), e1, e2, flip, line, TM_ADD);
codebini(fs, OP_ADDI, e1, e2, flip, line, TM_ADD);
else
codearith(fs, op, e1, e2, flip, line);
}
/*
** Code bitwise operations; they are all associative, so the function
** Code bitwise operations; they are all commutative, so the function
** tries to put an integer constant as the 2nd operand (a K operand).
*/
static void codebitwise (FuncState *fs, BinOpr opr,
expdesc *e1, expdesc *e2, int line) {
int flip = 0;
int v2;
OpCode op;
if (e1->k == VKINT && luaK_exp2RK(fs, e1)) {
if (e1->k == VKINT) {
swapexps(e1, e2); /* 'e2' will be the constant operand */
flip = 1;
}
else if (!(e2->k == VKINT && luaK_exp2RK(fs, e2))) { /* no constants? */
op = cast(OpCode, opr + OP_ADD);
codebinexpval(fs, op, e1, e2, line); /* all-register opcodes */
return;
}
v2 = e2->u.info; /* index in K array */
op = cast(OpCode, opr + OP_ADDK);
lua_assert(ttisinteger(&fs->f->k[v2]));
finishbinexpval(fs, e1, e2, op, v2, flip, line, OP_MMBINK,
cast(TMS, opr + TM_ADD));
if (e2->k == VKINT && luaK_exp2K(fs, e2)) /* K operand? */
codebinK(fs, opr, e1, e2, flip, line);
else /* no constants */
codebinNoK(fs, opr, e1, e2, flip, line);
}
@ -1507,25 +1546,27 @@ static void codebitwise (FuncState *fs, BinOpr opr,
** Emit code for order comparisons. When using an immediate operand,
** 'isfloat' tells whether the original value was a float.
*/
static void codeorder (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) {
static void codeorder (FuncState *fs, BinOpr opr, expdesc *e1, expdesc *e2) {
int r1, r2;
int im;
int isfloat = 0;
OpCode op;
if (isSCnumber(e2, &im, &isfloat)) {
/* use immediate operand */
r1 = luaK_exp2anyreg(fs, e1);
r2 = im;
op = cast(OpCode, (op - OP_LT) + OP_LTI);
op = binopr2op(opr, OPR_LT, OP_LTI);
}
else if (isSCnumber(e1, &im, &isfloat)) {
/* transform (A < B) to (B > A) and (A <= B) to (B >= A) */
r1 = luaK_exp2anyreg(fs, e2);
r2 = im;
op = (op == OP_LT) ? OP_GTI : OP_GEI;
op = binopr2op(opr, OPR_LT, OP_GTI);
}
else { /* regular case, compare two registers */
r1 = luaK_exp2anyreg(fs, e1);
r2 = luaK_exp2anyreg(fs, e2);
op = binopr2op(opr, OPR_LT, OP_LT);
}
freeexps(fs, e1, e2);
e1->u.info = condjump(fs, op, r1, r2, isfloat, 1);
@ -1551,7 +1592,7 @@ static void codeeq (FuncState *fs, BinOpr opr, expdesc *e1, expdesc *e2) {
op = OP_EQI;
r2 = im; /* immediate operand */
}
else if (luaK_exp2RK(fs, e2)) { /* 1st expression is constant? */
else if (luaK_exp2RK(fs, e2)) { /* 2nd expression is constant? */
op = OP_EQK;
r2 = e2->u.info; /* constant index */
}
@ -1568,16 +1609,16 @@ static void codeeq (FuncState *fs, BinOpr opr, expdesc *e1, expdesc *e2) {
/*
** Apply prefix operation 'op' to expression 'e'.
*/
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line) {
void luaK_prefix (FuncState *fs, UnOpr opr, expdesc *e, int line) {
static const expdesc ef = {VKINT, {0}, NO_JUMP, NO_JUMP};
luaK_dischargevars(fs, e);
switch (op) {
switch (opr) {
case OPR_MINUS: case OPR_BNOT: /* use 'ef' as fake 2nd operand */
if (constfolding(fs, op + LUA_OPUNM, e, &ef))
if (constfolding(fs, opr + LUA_OPUNM, e, &ef))
break;
/* else */ /* FALLTHROUGH */
case OPR_LEN:
codeunexpval(fs, cast(OpCode, op + OP_UNM), e, line);
codeunexpval(fs, unopr2op(opr), e, line);
break;
case OPR_NOT: codenot(fs, e); break;
default: lua_assert(0);
@ -1611,7 +1652,8 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
case OPR_SHL: case OPR_SHR: {
if (!tonumeral(v, NULL))
luaK_exp2anyreg(fs, v);
/* else keep numeral, which may be folded with 2nd operand */
/* else keep numeral, which may be folded or used as an immediate
operand */
break;
}
case OPR_EQ: case OPR_NE: {
@ -1706,30 +1748,27 @@ void luaK_posfix (FuncState *fs, BinOpr opr,
/* coded as (r1 >> -I) */;
}
else /* regular case (two registers) */
codebinexpval(fs, OP_SHL, e1, e2, line);
codebinexpval(fs, opr, e1, e2, line);
break;
}
case OPR_SHR: {
if (isSCint(e2))
codebini(fs, OP_SHRI, e1, e2, 0, line, TM_SHR); /* r1 >> I */
else /* regular case (two registers) */
codebinexpval(fs, OP_SHR, e1, e2, line);
codebinexpval(fs, opr, e1, e2, line);
break;
}
case OPR_EQ: case OPR_NE: {
codeeq(fs, opr, e1, e2);
break;
}
case OPR_LT: case OPR_LE: {
OpCode op = cast(OpCode, (opr - OPR_EQ) + OP_EQ);
codeorder(fs, op, e1, e2);
break;
}
case OPR_GT: case OPR_GE: {
/* '(a > b)' <=> '(b < a)'; '(a >= b)' <=> '(b <= a)' */
OpCode op = cast(OpCode, (opr - OPR_NE) + OP_EQ);
swapexps(e1, e2);
codeorder(fs, op, e1, e2);
opr = cast(BinOpr, (opr - OPR_GT) + OPR_LT);
} /* FALLTHROUGH */
case OPR_LT: case OPR_LE: {
codeorder(fs, opr, e1, e2);
break;
}
default: lua_assert(0);