mirror of
https://github.com/lua/lua
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118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
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** $Id: lopcodes.h,v 1.39 2000/02/11 16:52:54 roberto Exp roberto $
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** Opcodes for Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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#ifndef lopcodes_h
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#define lopcodes_h
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/*===========================================================================
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We assume that instructions are unsigned numbers with 4 bytes.
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All instructions have an opcode in the lower byte. Moreover,
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an instruction can have 0, 1, or 2 arguments. There are 4 types of
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Instructions:
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type 0: no arguments
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type 1: 1 unsigned argument in the higher 24 bits (called `U')
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type 2: 1 signed argument in the higher 24 bits (`S')
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type 3: 1st unsigned argument in the higher 16 bits (`A')
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2nd unsigned argument in the middle 8 bits (`B')
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The signed argument is represented in excess 2^23; that is, the real value
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is 2^23 minus the usigned value.
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===========================================================================*/
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/*
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** the following macros help to manipulate instructions
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*/
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#define MAXARG_U ((1<<24)-1)
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#define MAXARG_S ((1<<23)-1)
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#define MAXARG_A ((1<<16)-1)
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#define MAXARG_B ((1<<8)-1)
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#define GET_OPCODE(i) ((OpCode)((i)&0xFF))
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#define GETARG_U(i) ((int)((i)>>8))
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#define GETARG_S(i) ((int)((i)>>8)-(1<<23))
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#define GETARG_A(i) ((int)((i)>>16))
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#define GETARG_B(i) ((int)(((i)>>8) & 0xFF))
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#define SET_OPCODE(i,o) (((i)&0xFFFFFF00u) | (Instruction)(o))
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#define SETARG_U(i,u) (((i)&0x000000FFu) | ((Instruction)(u)<<8))
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#define SETARG_S(i,s) (((i)&0x000000FFu) | ((Instruction)((s)+(1<<23))<<8))
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#define SETARG_A(i,a) (((i)&0x0000FFFFu) | ((Instruction)(a)<<16))
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#define SETARG_B(i,b) (((i)&0xFFFF00FFu) | ((Instruction)(b)<<8))
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typedef enum {
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/* name parm before after side effect
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-----------------------------------------------------------------------------*/
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ENDCODE,/* - - (return) */
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RETCODE,/* U - (return) */
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CALL,/* A B v_n-v_1 f(at a) r_b-r_1 f(v1,...,v_n) */
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TAILCALL,/* A B v_a-v_1 f (return) f(v1,...,v_a) */
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PUSHNIL,/* U - nil_0-nil_u */
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POP,/* U a_u-a_1 - */
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PUSHINT,/* S - (real)s */
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PUSHSTRING,/* U - KSTR[u] */
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PUSHNUMBER,/* U - KNUM[u] */
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PUSHUPVALUE,/* U - Closure[u] */
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PUSHLOCAL,/* U - LOC[u] */
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GETGLOBAL,/* U - VAR[CNST[u]] */
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GETTABLE,/* - i t t[i] */
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GETDOTTED,/* U t t[CNST[u]] */
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PUSHSELF,/* U t t t[CNST[u]] */
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CREATETABLE,/* U - newarray(size = u) */
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SETLOCAL,/* U x - LOC[u]=x */
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SETGLOBAL,/* U x - VAR[CNST[u]]=x */
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SETTABLEPOP,/* - v i t - t[i]=v */
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SETTABLE,/* U v a_u-a_1 i t a_u-a_1 i t t[i]=v */
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SETLIST,/* A B v_b-v_0 t t t[i+a*FPF]=v_i */
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SETMAP,/* U v_u k_u - v_0 k_0 t t t[k_i]=v_i */
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NEQOP,/* - y x (x~=y)? 1 : nil */
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EQOP,/* - y x (x==y)? 1 : nil */
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LTOP,/* - y x (x<y)? 1 : nil */
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LEOP,/* - y x (x<y)? 1 : nil */
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GTOP,/* - y x (x>y)? 1 : nil */
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GEOP,/* - y x (x>=y)? 1 : nil */
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ADDOP,/* - y x x+y */
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SUBOP,/* - y x x-y */
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MULTOP,/* - y x x*y */
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DIVOP,/* - y x x/y */
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POWOP,/* - y x x^y */
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CONCOP,/* - y x x..y */
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MINUSOP,/* - x -x */
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NOTOP,/* - x (x==nil)? 1 : nil */
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ONTJMP,/* S x (x!=nil)? x : - (x!=nil)? PC+=s */
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ONFJMP,/* S x (x==nil)? x : - (x==nil)? PC+=s */
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JMP,/* S - - PC+=s */
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IFTJMP,/* S x - (x!=nil)? PC+=s */
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IFFJMP,/* S x - (x==nil)? PC+=s */
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CLOSURE,/* A B v_b-v_1 closure(CNST[a], v_b-v_1) */
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SETLINE/* U - - LINE=u */
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} OpCode;
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#define RFIELDS_PER_FLUSH 32 /* records (SETMAP) */
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#define LFIELDS_PER_FLUSH 64 /* FPF - lists (SETLIST) (<MAXARG_B) */
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#endif
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