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New instruction format for SETLIST/NEWTABLE

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New instruction format 'ivABC' (a variant of iABC where parameter vC has
10 bits) allows constructors of up to 1024 elements to be coded without
EXTRAARG.
This commit is contained in:
Roberto Ierusalimschy
2024-06-28 11:18:14 -03:00
parent 6ac7219da3
commit c403e456b6
7 changed files with 97 additions and 47 deletions
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12
lopcodes.c
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@@ -40,7 +40,7 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETTABLE */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETI */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETFIELD */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_NEWTABLE */
,opmode(0, 0, 0, 0, 1, ivABC) /* OP_NEWTABLE */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SELF */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDI */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDK */
@@ -99,7 +99,7 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
,opmode(0, 0, 0, 0, 0, iABx) /* OP_TFORPREP */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_TFORCALL */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_TFORLOOP */
,opmode(0, 0, 1, 0, 0, iABC) /* OP_SETLIST */
,opmode(0, 0, 1, 0, 0, ivABC) /* OP_SETLIST */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_CLOSURE */
,opmode(0, 1, 0, 0, 1, iABC) /* OP_VARARG */
,opmode(0, 0, 1, 0, 1, iABC) /* OP_VARARGPREP */
@@ -127,6 +127,12 @@ int luaP_isOT (Instruction i) {
** it accepts multiple results.
*/
int luaP_isIT (Instruction i) {
return testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0;
OpCode op = GET_OPCODE(i);
switch (op) {
case OP_SETLIST:
return testITMode(GET_OPCODE(i)) && GETARG_vB(i) == 0;
default:
return testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0;
}
}