diff options
Diffstat (limited to 'lua/lopcodes.h')
| -rw-r--r-- | lua/lopcodes.h | 106 |
1 files changed, 63 insertions, 43 deletions
diff --git a/lua/lopcodes.h b/lua/lopcodes.h index 41224d6..07d2b3f 100644 --- a/lua/lopcodes.h +++ b/lua/lopcodes.h @@ -1,5 +1,5 @@ /* -** $Id: lopcodes.h,v 1.125.1.1 2007/12/27 13:02:25 roberto Exp $ +** $Id: lopcodes.h,v 1.142 2011/07/15 12:50:29 roberto Exp $ ** Opcodes for Lua virtual machine ** See Copyright Notice in lua.h */ @@ -17,6 +17,7 @@ `A' : 8 bits `B' : 9 bits `C' : 9 bits + 'Ax' : 26 bits ('A', 'B', and 'C' together) `Bx' : 18 bits (`B' and `C' together) `sBx' : signed Bx @@ -28,7 +29,7 @@ ===========================================================================*/ -enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ +enum OpMode {iABC, iABx, iAsBx, iAx}; /* basic instruction format */ /* @@ -38,6 +39,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ #define SIZE_B 9 #define SIZE_Bx (SIZE_C + SIZE_B) #define SIZE_A 8 +#define SIZE_Ax (SIZE_C + SIZE_B + SIZE_A) #define SIZE_OP 6 @@ -46,6 +48,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ #define POS_C (POS_A + SIZE_A) #define POS_B (POS_C + SIZE_C) #define POS_Bx POS_C +#define POS_Ax POS_A /* @@ -61,6 +64,12 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ #define MAXARG_sBx MAX_INT #endif +#if SIZE_Ax < LUAI_BITSINT-1 +#define MAXARG_Ax ((1<<SIZE_Ax)-1) +#else +#define MAXARG_Ax MAX_INT +#endif + #define MAXARG_A ((1<<SIZE_A)-1) #define MAXARG_B ((1<<SIZE_B)-1) @@ -68,7 +77,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ /* creates a mask with `n' 1 bits at position `p' */ -#define MASK1(n,p) ((~((~(Instruction)0)<<n))<<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)) @@ -81,21 +90,24 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ #define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \ ((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP)))) -#define GETARG_A(i) (cast(int, ((i)>>POS_A) & MASK1(SIZE_A,0))) -#define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \ - ((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A)))) +#define getarg(i,pos,size) (cast(int, ((i)>>pos) & MASK1(size,0))) +#define setarg(i,v,pos,size) ((i) = (((i)&MASK0(size,pos)) | \ + ((cast(Instruction, v)<<pos)&MASK1(size,pos)))) -#define GETARG_B(i) (cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0))) -#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \ - ((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B)))) +#define GETARG_A(i) getarg(i, POS_A, SIZE_A) +#define SETARG_A(i,v) setarg(i, v, POS_A, SIZE_A) -#define GETARG_C(i) (cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0))) -#define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \ - ((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C)))) +#define GETARG_B(i) getarg(i, POS_B, SIZE_B) +#define SETARG_B(i,v) setarg(i, v, POS_B, SIZE_B) -#define GETARG_Bx(i) (cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0))) -#define SETARG_Bx(i,b) ((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \ - ((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx)))) +#define GETARG_C(i) getarg(i, POS_C, SIZE_C) +#define SETARG_C(i,v) setarg(i, v, POS_C, SIZE_C) + +#define GETARG_Bx(i) getarg(i, POS_Bx, SIZE_Bx) +#define SETARG_Bx(i,v) setarg(i, v, POS_Bx, SIZE_Bx) + +#define GETARG_Ax(i) getarg(i, POS_Ax, SIZE_Ax) +#define SETARG_Ax(i,v) setarg(i, v, POS_Ax, SIZE_Ax) #define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx) #define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx)) @@ -110,6 +122,9 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ | (cast(Instruction, a)<<POS_A) \ | (cast(Instruction, bc)<<POS_Bx)) +#define CREATE_Ax(o,a) ((cast(Instruction, o)<<POS_OP) \ + | (cast(Instruction, a)<<POS_Ax)) + /* ** Macros to operate RK indices @@ -153,14 +168,15 @@ name args description ------------------------------------------------------------------------*/ OP_MOVE,/* A B R(A) := R(B) */ OP_LOADK,/* A Bx R(A) := Kst(Bx) */ +OP_LOADKX,/* A R(A) := Kst(extra arg) */ OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) pc++ */ -OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */ +OP_LOADNIL,/* A B R(A), R(A+1), ..., R(A+B) := nil */ OP_GETUPVAL,/* A B R(A) := UpValue[B] */ -OP_GETGLOBAL,/* A Bx R(A) := Gbl[Kst(Bx)] */ +OP_GETTABUP,/* A B C R(A) := UpValue[B][RK(C)] */ OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */ -OP_SETGLOBAL,/* A Bx Gbl[Kst(Bx)] := R(A) */ +OP_SETTABUP,/* A B C UpValue[A][RK(B)] := RK(C) */ OP_SETUPVAL,/* A B UpValue[B] := R(A) */ OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */ @@ -180,14 +196,13 @@ OP_LEN,/* A B R(A) := length of R(B) */ OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */ -OP_JMP,/* sBx pc+=sBx */ - +OP_JMP,/* A sBx pc+=sBx; if (A) close all upvalues >= R(A) + 1 */ OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */ -OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */ -OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */ +OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */ +OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */ -OP_TEST,/* A C if not (R(A) <=> C) then pc++ */ -OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */ +OP_TEST,/* A C if not (R(A) <=> C) then pc++ */ +OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */ 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 return R(A)(R(A+1), ... ,R(A+B-1)) */ @@ -197,39 +212,44 @@ OP_FORLOOP,/* A sBx R(A)+=R(A+2); if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/ OP_FORPREP,/* A sBx R(A)-=R(A+2); pc+=sBx */ -OP_TFORLOOP,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); - if R(A+3) ~= nil then R(A+2)=R(A+3) else pc++ */ +OP_TFORCALL,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); */ +OP_TFORLOOP,/* A sBx if R(A+1) ~= nil then { R(A)=R(A+1); pc += sBx }*/ + 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)) */ +OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx]) */ + +OP_VARARG,/* A B R(A), R(A+1), ..., R(A+B-2) = vararg */ -OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */ +OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */ } OpCode; -#define NUM_OPCODES (cast(int, OP_VARARG) + 1) +#define NUM_OPCODES (cast(int, OP_EXTRAARG) + 1) /*=========================================================================== Notes: - (*) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1, - and can be 0: OP_CALL then sets `top' to last_result+1, so - next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'. + (*) In OP_CALL, if (B == 0) then B = top. 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 (B == 0) then use actual number of varargs and - set top (like in OP_CALL with C == 0). + set top (like in OP_CALL with C == 0). - (*) In OP_RETURN, if (B == 0) then return up to `top' + (*) In OP_RETURN, if (B == 0) then return up to `top'. - (*) In OP_SETLIST, if (B == 0) then B = `top'; - if (C == 0) then next `instruction' is real C + (*) In OP_SETLIST, if (B == 0) then B = `top'; if (C == 0) then next + 'instruction' is EXTRAARG(real C). + + (*) In OP_LOADKX, the next 'instruction' is always EXTRAARG. (*) For comparisons, A specifies what condition the test should accept - (true or false). + (true or false). + + (*) All `skips' (pc++) assume that next instruction is a jump. - (*) All `skips' (pc++) assume that next instruction is a jump ===========================================================================*/ @@ -239,8 +259,8 @@ OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */ ** bits 2-3: C arg mode ** bits 4-5: B arg mode ** bit 6: instruction set register A -** bit 7: operator is a test -*/ +** bit 7: operator is a test (next instruction must be a jump) +*/ enum OpArgMask { OpArgN, /* argument is not used */ @@ -249,7 +269,7 @@ enum OpArgMask { OpArgK /* argument is a constant or register/constant */ }; -LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES]; +LUAI_DDEC const lu_byte luaP_opmodes[NUM_OPCODES]; #define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3)) #define getBMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3)) @@ -258,7 +278,7 @@ LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES]; #define testTMode(m) (luaP_opmodes[m] & (1 << 7)) -LUAI_DATA const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */ +LUAI_DDEC const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */ /* number of list items to accumulate before a SETLIST instruction */ |