From c161b7d6fe142231346cc1844e6e27c0ab7718c1 Mon Sep 17 00:00:00 2001 From: Hans Hagen Date: Fri, 16 Sep 2022 15:53:42 +0200 Subject: 2022-09-16 14:41:00 --- .../luametatex/source/luacore/lua54/src/lopcodes.h | 405 +++++++++++++++++++++ 1 file changed, 405 insertions(+) create mode 100644 source/luametatex/source/luacore/lua54/src/lopcodes.h (limited to 'source/luametatex/source/luacore/lua54/src/lopcodes.h') diff --git a/source/luametatex/source/luacore/lua54/src/lopcodes.h b/source/luametatex/source/luacore/lua54/src/lopcodes.h new file mode 100644 index 000000000..7c2745159 --- /dev/null +++ b/source/luametatex/source/luacore/lua54/src/lopcodes.h @@ -0,0 +1,405 @@ +/* +** $Id: lopcodes.h $ +** Opcodes for Lua virtual machine +** See Copyright Notice in lua.h +*/ + +#ifndef lopcodes_h +#define lopcodes_h + +#include "llimits.h" + + +/*=========================================================================== + We assume that instructions are unsigned 32-bit integers. + All instructions have an opcode in the first 7 bits. + Instructions can have the following formats: + + 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 + 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 +iABC C(8) | B(8) |k| A(8) | Op(7) | +iABx Bx(17) | A(8) | Op(7) | +iAsBx sBx (signed)(17) | A(8) | Op(7) | +iAx Ax(25) | Op(7) | +isJ sJ(25) | Op(7) | + + A signed argument is represented in excess K: the represented value is + the written unsigned value minus K, where K is half the maximum for the + corresponding unsigned argument. +===========================================================================*/ + + +enum OpMode {iABC, iABx, iAsBx, iAx, isJ}; /* basic instruction formats */ + + +/* +** size and position of opcode arguments. +*/ +#define SIZE_C 8 +#define SIZE_B 8 +#define SIZE_Bx (SIZE_C + SIZE_B + 1) +#define SIZE_A 8 +#define SIZE_Ax (SIZE_Bx + SIZE_A) +#define SIZE_sJ (SIZE_Bx + SIZE_A) + +#define SIZE_OP 7 + +#define POS_OP 0 + +#define POS_A (POS_OP + SIZE_OP) +#define POS_k (POS_A + SIZE_A) +#define POS_B (POS_k + 1) +#define POS_C (POS_B + SIZE_B) + +#define POS_Bx POS_k + +#define POS_Ax POS_A + +#define POS_sJ POS_A + + +/* +** limits for opcode arguments. +** we use (signed) 'int' to manipulate most arguments, +** so they must fit in ints. +*/ + +/* Check whether type 'int' has at least 'b' bits ('b' < 32) */ +#define L_INTHASBITS(b) ((UINT_MAX >> ((b) - 1)) >= 1) + + +#if L_INTHASBITS(SIZE_Bx) +#define MAXARG_Bx ((1<>1) /* 'sBx' is signed */ + + +#if L_INTHASBITS(SIZE_Ax) +#define MAXARG_Ax ((1<> 1) + + +#define MAXARG_A ((1<> 1) + +#define int2sC(i) ((i) + OFFSET_sC) +#define sC2int(i) ((i) - OFFSET_sC) + + +/* creates a mask with 'n' 1 bits at position 'p' */ +#define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p)) + +/* creates a mask with 'n' 0 bits at position 'p' */ +#define MASK0(n,p) (~MASK1(n,p)) + +/* +** the following macros help to manipulate instructions +*/ + +#define GET_OPCODE(i) (cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0))) +#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \ + ((cast(Instruction, o)<>(pos)) & MASK1(size,0))) +#define setarg(i,v,pos,size) ((i) = (((i)&MASK0(size,pos)) | \ + ((cast(Instruction, v)<> sC */ +OP_SHLI,/* A B sC R[A] := sC << R[B] */ + +OP_ADD,/* A B C R[A] := R[B] + R[C] */ +OP_SUB,/* A B C R[A] := R[B] - R[C] */ +OP_MUL,/* A B C R[A] := R[B] * R[C] */ +OP_MOD,/* A B C R[A] := R[B] % R[C] */ +OP_POW,/* A B C R[A] := R[B] ^ R[C] */ +OP_DIV,/* A B C R[A] := R[B] / R[C] */ +OP_IDIV,/* A B C R[A] := R[B] // R[C] */ + +OP_BAND,/* A B C R[A] := R[B] & R[C] */ +OP_BOR,/* A B C R[A] := R[B] | R[C] */ +OP_BXOR,/* A B C R[A] := R[B] ~ R[C] */ +OP_SHL,/* A B C R[A] := R[B] << R[C] */ +OP_SHR,/* A B C R[A] := R[B] >> R[C] */ + +OP_MMBIN,/* A B C call C metamethod over R[A] and R[B] (*) */ +OP_MMBINI,/* A sB C k call C metamethod over R[A] and sB */ +OP_MMBINK,/* A B C k call C metamethod over R[A] and K[B] */ + +OP_UNM,/* A B R[A] := -R[B] */ +OP_BNOT,/* A B R[A] := ~R[B] */ +OP_NOT,/* A B R[A] := not R[B] */ +OP_LEN,/* A B R[A] := #R[B] (length operator) */ + +OP_CONCAT,/* A B R[A] := R[A].. ... ..R[A + B - 1] */ + +OP_CLOSE,/* A close all upvalues >= R[A] */ +OP_TBC,/* A mark variable A "to be closed" */ +OP_JMP,/* sJ pc += sJ */ +OP_EQ,/* A B k if ((R[A] == R[B]) ~= k) then pc++ */ +OP_LT,/* A B k if ((R[A] < R[B]) ~= k) then pc++ */ +OP_LE,/* A B k if ((R[A] <= R[B]) ~= k) then pc++ */ + +OP_EQK,/* A B k if ((R[A] == K[B]) ~= k) then pc++ */ +OP_EQI,/* A sB k if ((R[A] == sB) ~= k) then pc++ */ +OP_LTI,/* A sB k if ((R[A] < sB) ~= k) then pc++ */ +OP_LEI,/* A sB k if ((R[A] <= sB) ~= k) then pc++ */ +OP_GTI,/* A sB k if ((R[A] > sB) ~= k) then pc++ */ +OP_GEI,/* A sB k if ((R[A] >= sB) ~= k) then pc++ */ + +OP_TEST,/* A k if (not R[A] == k) then pc++ */ +OP_TESTSET,/* A B k if (not R[B] == k) then pc++ else R[A] := R[B] (*) */ + +OP_CALL,/* A B C R[A], ... ,R[A+C-2] := R[A](R[A+1], ... ,R[A+B-1]) */ +OP_TAILCALL,/* A B C k return R[A](R[A+1], ... ,R[A+B-1]) */ + +OP_RETURN,/* A B C k return R[A], ... ,R[A+B-2] (see note) */ +OP_RETURN0,/* return */ +OP_RETURN1,/* A return R[A] */ + +OP_FORLOOP,/* A Bx update counters; if loop continues then pc-=Bx; */ +OP_FORPREP,/* A Bx ; + if not to run then pc+=Bx+1; */ + +OP_TFORPREP,/* A Bx create upvalue for R[A + 3]; pc+=Bx */ +OP_TFORCALL,/* A C R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]); */ +OP_TFORLOOP,/* A Bx if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx } */ + +OP_SETLIST,/* A B C k R[A][C+i] := R[A+i], 1 <= i <= B */ + +OP_CLOSURE,/* A Bx R[A] := closure(KPROTO[Bx]) */ + +OP_VARARG,/* A C R[A], R[A+1], ..., R[A+C-2] = vararg */ + +OP_VARARGPREP,/*A (adjust vararg parameters) */ + +OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */ +} OpCode; + + +#define NUM_OPCODES ((int)(OP_EXTRAARG) + 1) + + + +/*=========================================================================== + Notes: + + (*) Opcode OP_LFALSESKIP is used to convert a condition to a boolean + value, in a code equivalent to (not cond ? false : true). (It + produces false and skips the next instruction producing true.) + + (*) Opcodes OP_MMBIN and variants follow each arithmetic and + bitwise opcode. If the operation succeeds, it skips this next + opcode. Otherwise, this opcode calls the corresponding metamethod. + + (*) Opcode OP_TESTSET is used in short-circuit expressions that need + both to jump and to produce a value, such as (a = b or c). + + (*) In OP_CALL, if (B == 0) then B = top - A. If (C == 0), then + 'top' is set to last_result+1, so next open instruction (OP_CALL, + OP_RETURN*, OP_SETLIST) may use 'top'. + + (*) In OP_VARARG, if (C == 0) then use actual number of varargs and + set top (like in OP_CALL with C == 0). + + (*) In OP_RETURN, if (B == 0) then return up to 'top'. + + (*) In OP_LOADKX and OP_NEWTABLE, the next instruction is always + OP_EXTRAARG. + + (*) In OP_SETLIST, if (B == 0) then real B = 'top'; if k, then + real C = EXTRAARG _ C (the bits of EXTRAARG concatenated with the + bits of C). + + (*) In OP_NEWTABLE, B is log2 of the hash size (which is always a + power of 2) plus 1, or zero for size zero. If not k, the array size + is C. Otherwise, the array size is EXTRAARG _ C. + + (*) For comparisons, k specifies what condition the test should accept + (true or false). + + (*) In OP_MMBINI/OP_MMBINK, k means the arguments were flipped + (the constant is the first operand). + + (*) All 'skips' (pc++) assume that next instruction is a jump. + + (*) In instructions OP_RETURN/OP_TAILCALL, 'k' specifies that the + function builds upvalues, which may need to be closed. C > 0 means + the function is vararg, so that its 'func' must be corrected before + returning; in this case, (C - 1) is its number of fixed parameters. + + (*) In comparisons with an immediate operand, C signals whether the + original operand was a float. (It must be corrected in case of + metamethods.) + +===========================================================================*/ + + +/* +** masks for instruction properties. The format is: +** bits 0-2: op mode +** bit 3: instruction set register A +** bit 4: operator is a test (next instruction must be a jump) +** bit 5: instruction uses 'L->top' set by previous instruction (when B == 0) +** bit 6: instruction sets 'L->top' for next instruction (when C == 0) +** bit 7: instruction is an MM instruction (call a metamethod) +*/ + +LUAI_DDEC(const lu_byte luaP_opmodes[NUM_OPCODES];) + +#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 7)) +#define testAMode(m) (luaP_opmodes[m] & (1 << 3)) +#define testTMode(m) (luaP_opmodes[m] & (1 << 4)) +#define testITMode(m) (luaP_opmodes[m] & (1 << 5)) +#define testOTMode(m) (luaP_opmodes[m] & (1 << 6)) +#define testMMMode(m) (luaP_opmodes[m] & (1 << 7)) + +/* "out top" (set top for next instruction) */ +#define isOT(i) \ + ((testOTMode(GET_OPCODE(i)) && GETARG_C(i) == 0) || \ + GET_OPCODE(i) == OP_TAILCALL) + +/* "in top" (uses top from previous instruction) */ +#define isIT(i) (testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0) + +#define opmode(mm,ot,it,t,a,m) \ + (((mm) << 7) | ((ot) << 6) | ((it) << 5) | ((t) << 4) | ((a) << 3) | (m)) + + +/* number of list items to accumulate before a SETLIST instruction */ +#define LFIELDS_PER_FLUSH 50 + +#endif -- cgit v1.2.3