mirror of https://github.com/lua/lua
new opcode variants.
This commit is contained in:
parent
3c820d622e
commit
0dd6d1080e
30
lopcodes.h
30
lopcodes.h
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@ -1,5 +1,5 @@
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/*
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** $Id: lopcodes.h,v 1.3 1997/09/19 21:17:52 roberto Exp roberto $
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** $Id: lopcodes.h,v 1.4 1997/09/22 20:53:20 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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@ -29,10 +29,21 @@ PUSH2,/* - 2.0 */
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PUSHBYTE,/* b - (float)b */
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PUSHWORD,/* w - (float)w */
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PUSHCONSTANT0,/* - CNST[0] */
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PUSHCONSTANT1,/* - CNST[1] */
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PUSHCONSTANT2,/* - CNST[2] */
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PUSHCONSTANT3,/* - CNST[3] */
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PUSHCONSTANT4,/* - CNST[4] */
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PUSHCONSTANT5,/* - CNST[5] */
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PUSHCONSTANT6,/* - CNST[6] */
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PUSHCONSTANT7,/* - CNST[7] */
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PUSHCONSTANT8,/* - CNST[8] */
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PUSHCONSTANT9,/* - CNST[9] */
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PUSHCONSTANTB,/*b - CNST[b] */
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PUSHCONSTANT,/* w - CNST[w] */
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PUSHUPVALUE0,
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PUSHUPVALUE1,
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PUSHUPVALUE,/* b - Closure[b] */
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PUSHLOCAL0,/* - LOC[0] */
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@ -47,6 +58,16 @@ PUSHLOCAL8,/* - LOC[8] */
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PUSHLOCAL9,/* - LOC[9] */
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PUSHLOCAL,/* b - LOC[b] */
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GETGLOBAL0,/* - VAR[CNST[0]] */
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GETGLOBAL1,/* - VAR[CNST[1]] */
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GETGLOBAL2,/* - VAR[CNST[2]] */
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GETGLOBAL3,/* - VAR[CNST[3]] */
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GETGLOBAL4,/* - VAR[CNST[4]] */
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GETGLOBAL5,/* - VAR[CNST[5]] */
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GETGLOBAL6,/* - VAR[CNST[6]] */
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GETGLOBAL7,/* - VAR[CNST[7]] */
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GETGLOBAL8,/* - VAR[CNST[8]] */
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GETGLOBAL9,/* - VAR[CNST[9]] */
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GETGLOBALB,/* b - VAR[CNST[b]] */
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GETGLOBAL,/* w - VAR[CNST[w]] */
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@ -94,11 +115,14 @@ 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,/* w x (x!=nil)? x : - (x!=nil)? PC+=w */
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ONFJMP,/* w x (x==nil)? x : - (x==nil)? PC+=w */
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/* NOTICE: all jumps are relative to the position following the opcode */
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ONTJMP,/* b x (x!=nil)? x : - (x!=nil)? PC+=b */
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ONFJMP,/* b x (x==nil)? x : - (x==nil)? PC+=b */
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JMP,/* w - - PC+=w */
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UPJMPB,/* b - - PC-=b */
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UPJMP,/* w - - PC-=w */
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IFFJMP,/* w x - (x==nil)? PC+=w */
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IFFUPJMPB,/* b x - (x==nil)? PC-=b */
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IFFUPJMP,/* w x - (x==nil)? PC-=w */
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CLOSUREB,/* b v_1...v_n c(CNST[b]) */
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114
lua.stx
114
lua.stx
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@ -1,6 +1,6 @@
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%{
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/*
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** $Id: lua.stx,v 1.3 1997/09/19 21:17:52 roberto Exp roberto $
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** $Id: lua.stx,v 1.4 1997/09/22 20:53:20 roberto Exp roberto $
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** Syntax analizer and code generator
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** See Copyright Notice in lua.h
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*/
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@ -96,15 +96,24 @@ static void code_byte (Byte c)
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static void code_word_at (int pc, int n)
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{
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Word w = n;
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if (w != n)
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luaY_error("block too big");
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if (n > MAX_WORD)
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luaY_error("construction too big; unable to compile");
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currState->f->code[pc] = n&0xFF;
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currState->f->code[pc+1] = n>>8;
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}
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static void fix_jump (int pc, OpCode op, int n)
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{
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currState->f->code[pc] = op;
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code_word_at(pc+1, n);
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}
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static void code_word (int n)
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{
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if (n > MAX_WORD)
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luaY_error("construction too big; unable to compile");
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code_byte(n&0xFF);
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code_byte(n>>8);
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}
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@ -128,16 +137,25 @@ static void code_opcode (OpCode op, int delta)
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}
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static void code_opborw(OpCode opbyte, int arg, int delta)
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static void code_opb (OpCode opbyte, int arg, int delta)
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{
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if (arg <= 255) {
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code_opcode(opbyte, delta);
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code_byte(arg);
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}
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else {
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code_opcode(opbyte+1, delta);
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code_word(arg);
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}
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code_opcode(opbyte, delta);
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code_byte(arg);
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}
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static void code_opw (OpCode opbyte, int arg, int delta)
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{
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code_opcode(opbyte, delta);
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code_word(arg);
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}
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static void code_opborw (OpCode opbyte, int arg, int delta)
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{
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if (arg <= 255)
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code_opb(opbyte, arg, delta);
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else
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code_opw(opbyte+1, arg, delta);
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}
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@ -167,7 +185,7 @@ static void code_pop (OpCode op)
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static void code_constant (int c)
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{
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code_opborw(PUSHCONSTANTB, c, 1);
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code_oparg(PUSHCONSTANT0, PUSHCONSTANTB, c, 1);
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}
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@ -235,9 +253,8 @@ static void code_number (real f)
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static void flush_record (int n)
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{
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if (n == 0) return;
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code_opcode(SETMAP, -2*n);
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code_byte(n);
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if (n > 0)
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code_opb(SETMAP, n, -2*n);
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}
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static void flush_list (int m, int n)
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@ -245,10 +262,8 @@ static void flush_list (int m, int n)
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if (n == 0) return;
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if (m == 0)
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code_opcode(SETLIST0, -n);
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else if (m < 255) {
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code_opcode(SETLIST, -n);
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code_byte(m);
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}
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else if (m < 255)
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code_opb(SETLIST, m, -n);
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else
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luaY_error("list constructor too long");
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code_byte(n);
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@ -352,8 +367,7 @@ void luaY_codedebugline (int line)
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{
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static int lastline = 0;
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if (lua_debug && line != lastline) {
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code_neutralop(SETLINE);
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code_word(line);
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code_opw(SETLINE, line, 0);
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lastline = line;
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}
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}
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@ -399,13 +413,10 @@ static void adjust_mult_assign (int vars, long exps)
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static void code_args (int dots)
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{
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if (!dots) {
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code_opcode(ARGS, currState->nlocalvar);
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code_byte(currState->nlocalvar);
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}
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if (!dots)
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code_opb(ARGS, currState->nlocalvar, currState->nlocalvar);
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else {
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code_opcode(VARARGS, currState->nlocalvar+1);
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code_byte(currState->nlocalvar);
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code_opb(VARARGS, currState->nlocalvar, currState->nlocalvar+1);
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add_localvar(luaS_new("arg"));
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}
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}
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@ -414,7 +425,7 @@ static void code_args (int dots)
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static void lua_pushvar (vardesc number)
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{
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if (number > 0) /* global var */
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code_opborw(GETGLOBALB, number-1, 1);
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code_oparg(GETGLOBAL0, GETGLOBALB, number-1, 1);
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else if (number < 0) /* local var */
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code_oparg(PUSHLOCAL0, PUSHLOCAL, (-number)-1, 1);
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else
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@ -456,19 +467,19 @@ static void codeIf (int thenAdd, int elseAdd)
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currState->pc -= sizeof(Word)+1;
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elseinit = currState->pc;
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}
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else {
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currState->f->code[elseAdd] = JMP;
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code_word_at(elseAdd+1, currState->pc-elseinit);
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}
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currState->f->code[thenAdd] = IFFJMP;
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code_word_at(thenAdd+1, elseinit-(thenAdd+sizeof(Word)+1));
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else
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fix_jump(elseAdd, JMP, currState->pc-(elseAdd+1));
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fix_jump(thenAdd, IFFJMP, elseinit-(thenAdd+1));
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}
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static void code_shortcircuit (int pc, Byte jmp)
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static void code_shortcircuit (OpCode op, int pos)
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{
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currState->f->code[pc] = jmp;
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code_word_at(pc+1, currState->pc - (pc + sizeof(Word)+1));
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int dist = currState->pc - (pos+1);
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if (dist > 255)
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luaY_error("and/or expression too long");
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currState->f->code[pos] = op;
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currState->f->code[pos+1] = dist;
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}
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@ -582,7 +593,7 @@ TProtoFunc *luaY_parser (ZIO *z, char *chunkname)
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%token <vReal> NUMBER
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%token <pTStr> NAME STRING
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%type <vInt> PrepJump, PrepJumpPop
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%type <vInt> PrepJump, PrepJumpPop, PrepJumpSC
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%type <vLong> exprlist, exprlist1 /* if > 0, points to function return
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counter (which has list length); if <= 0, -list lenght */
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%type <vLong> functioncall, expr /* if != 0, points to function return
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@ -620,18 +631,15 @@ sc : /* empty */ | ';' ;
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stat : IF expr1 THEN PrepJumpPop block PrepJump elsepart END
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{ codeIf($4, $6); }
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| WHILE {$<vInt>$=currState->pc;} expr1 DO PrepJumpPop block PrepJump END
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| WHILE {$<vInt>$=currState->pc;} expr1 DO PrepJumpPop block END
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{
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currState->f->code[$5] = IFFJMP;
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code_word_at($5+1, currState->pc - ($5+sizeof(Word)+1));
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currState->f->code[$7] = UPJMP;
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code_word_at($7+1, currState->pc - ($<vInt>2));
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code_opborw(UPJMPB, currState->pc+1 - ($<vInt>2), 0);
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fix_jump($5, IFFJMP, currState->pc - ($5+1));
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}
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| REPEAT {$<vInt>$=currState->pc;} block UNTIL expr1 PrepJumpPop
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| REPEAT {$<vInt>$=currState->pc;} block UNTIL expr1
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{
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currState->f->code[$6] = IFFUPJMP;
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code_word_at($6+1, currState->pc - ($<vInt>2));
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code_opborw(IFFUPJMPB, currState->pc+1 - ($<vInt>2), -1);
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}
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| varlist1 '=' exprlist1
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@ -699,6 +707,10 @@ PrepJump : /* empty */
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}
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;
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PrepJumpSC : /* empty */
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{ $$ = currState->pc; code_opcode(0, -1); code_byte(0); }
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;
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PrepJumpPop : PrepJump { $$ = $1; deltastack(-1); /* pop condition */ }
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;
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@ -726,13 +738,13 @@ expr : '(' expr ')' { $$ = $2; }
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| STRING { code_string($1); $$ = 0; }
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| NIL {code_opcode(PUSHNIL, 1); $$ = 0; }
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| functioncall { $$ = $1; }
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| expr1 AND PrepJumpPop expr1 { code_shortcircuit($3, ONFJMP); $$ = 0; }
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| expr1 OR PrepJumpPop expr1 { code_shortcircuit($3, ONTJMP); $$ = 0; }
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| FUNCTION { init_func(); } body { func_onstack($3); $$ = 0; }
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| expr1 AND PrepJumpSC expr1 { code_shortcircuit(ONFJMP, $3); $$ = 0; }
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| expr1 OR PrepJumpSC expr1 { code_shortcircuit(ONTJMP, $3); $$ = 0; }
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;
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table :
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{ code_opcode(CREATEARRAY, 1); $<vInt>$ = currState->pc; code_word(0); }
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{ $<vInt>$ = currState->pc+1; code_opw(CREATEARRAY, 0, 1); }
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'{' fieldlist '}'
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{ code_word_at($<vInt>1, $3); }
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;
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85
lvm.c
85
lvm.c
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@ -1,5 +1,5 @@
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/*
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** $Id: lvm.c,v 1.3 1997/09/19 21:17:52 roberto Exp roberto $
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** $Id: lvm.c,v 1.4 1997/09/22 20:53:20 roberto Exp roberto $
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** Lua virtual machine
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** See Copyright Notice in lua.h
|
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*/
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@ -22,9 +22,9 @@
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#include "lvm.h"
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#define get_prevword(pc) (*(pc-2)+(*(pc-1)<<8))
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#define get_word(pc) (pc+=2, get_prevword(pc))
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#define skip_word(pc) {pc+=2;}
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#define skip_word(pc) (pc+=2)
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#define get_word(pc) (*(pc)+(*((pc)+1)<<8))
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#define next_word(pc) (pc+=2, get_word(pc-2))
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/* Extra stack to run a function: LUA_T_LINE(1), TM calls(2), ... */
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@ -300,7 +300,7 @@ StkId luaV_execute (Closure *cl, StkId base)
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aux = *pc++; goto pushnumber;
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case PUSHWORD:
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aux = get_word(pc); goto pushnumber;
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aux = next_word(pc); goto pushnumber;
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case PUSH0: case PUSH1: case PUSH2:
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aux -= PUSH0;
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@ -323,10 +323,16 @@ StkId luaV_execute (Closure *cl, StkId base)
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break;
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case GETGLOBAL:
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aux = get_word(pc); goto getglobal;
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aux = next_word(pc); goto getglobal;
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case GETGLOBALB:
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aux = *pc++;
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aux = *pc++; goto getglobal;
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case GETGLOBAL0: case GETGLOBAL1: case GETGLOBAL2:
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case GETGLOBAL3: case GETGLOBAL4: case GETGLOBAL5:
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case GETGLOBAL6: case GETGLOBAL7: case GETGLOBAL8:
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case GETGLOBAL9:
|
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aux -= GETGLOBAL0;
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getglobal:
|
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luaV_getglobal(luaG_findsymbol(tsvalue(&consts[aux])));
|
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break;
|
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|
@ -336,7 +342,7 @@ StkId luaV_execute (Closure *cl, StkId base)
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break;
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case PUSHSELF:
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aux = get_word(pc); goto pushself;
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aux = next_word(pc); goto pushself;
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|
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case PUSHSELFB:
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aux = *pc++;
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|
@ -349,10 +355,16 @@ StkId luaV_execute (Closure *cl, StkId base)
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}
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|
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case PUSHCONSTANT:
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aux = get_word(pc); goto pushconstant;
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aux = next_word(pc); goto pushconstant;
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|
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case PUSHCONSTANTB:
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aux = *pc++;
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aux = *pc++; goto pushconstant;
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|
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case PUSHCONSTANT0: case PUSHCONSTANT1: case PUSHCONSTANT2:
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case PUSHCONSTANT3: case PUSHCONSTANT4: case PUSHCONSTANT5:
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case PUSHCONSTANT6: case PUSHCONSTANT7: case PUSHCONSTANT8:
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case PUSHCONSTANT9:
|
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aux -= PUSHCONSTANT0;
|
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pushconstant:
|
||||
*luaD_stack.top++ = consts[aux];
|
||||
break;
|
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|
@ -360,8 +372,8 @@ StkId luaV_execute (Closure *cl, StkId base)
|
|||
case PUSHUPVALUE:
|
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aux = *pc++; goto pushupvalue;
|
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|
||||
case PUSHUPVALUE0:
|
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aux = 0;
|
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case PUSHUPVALUE0: case PUSHUPVALUE1:
|
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aux -= PUSHUPVALUE0;
|
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pushupvalue:
|
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*luaD_stack.top++ = cl->consts[aux+1];
|
||||
break;
|
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|
@ -379,7 +391,7 @@ StkId luaV_execute (Closure *cl, StkId base)
|
|||
break;
|
||||
|
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case SETGLOBAL:
|
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aux = get_word(pc); goto setglobal;
|
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aux = next_word(pc); goto setglobal;
|
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|
||||
case SETGLOBALB:
|
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aux = *pc++;
|
||||
|
@ -442,7 +454,7 @@ StkId luaV_execute (Closure *cl, StkId base)
|
|||
|
||||
case CREATEARRAY:
|
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luaC_checkGC();
|
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avalue(luaD_stack.top) = luaH_new(get_word(pc));
|
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avalue(luaD_stack.top) = luaH_new(next_word(pc));
|
||||
ttype(luaD_stack.top) = LUA_T_ARRAY;
|
||||
luaD_stack.top++;
|
||||
break;
|
||||
|
@ -554,45 +566,58 @@ StkId luaV_execute (Closure *cl, StkId base)
|
|||
break;
|
||||
|
||||
case ONTJMP:
|
||||
skip_word(pc);
|
||||
if (ttype(luaD_stack.top-1) != LUA_T_NIL)
|
||||
pc += get_prevword(pc);
|
||||
else
|
||||
pc += *pc;
|
||||
else {
|
||||
pc++;
|
||||
luaD_stack.top--;
|
||||
}
|
||||
break;
|
||||
|
||||
case ONFJMP:
|
||||
skip_word(pc);
|
||||
if (ttype(luaD_stack.top-1) == LUA_T_NIL)
|
||||
pc += get_prevword(pc);
|
||||
else
|
||||
pc += *pc;
|
||||
else {
|
||||
pc++;
|
||||
luaD_stack.top--;
|
||||
}
|
||||
break;
|
||||
|
||||
case JMP:
|
||||
skip_word(pc);
|
||||
pc += get_prevword(pc);
|
||||
pc += get_word(pc);
|
||||
break;
|
||||
|
||||
case UPJMPB:
|
||||
pc -= *pc;
|
||||
break;
|
||||
|
||||
case UPJMP:
|
||||
skip_word(pc);
|
||||
pc -= get_prevword(pc);
|
||||
pc -= get_word(pc);
|
||||
break;
|
||||
|
||||
case IFFJMP:
|
||||
skip_word(pc);
|
||||
if (ttype(--luaD_stack.top) == LUA_T_NIL)
|
||||
pc += get_prevword(pc);
|
||||
pc += get_word(pc);
|
||||
else
|
||||
skip_word(pc);
|
||||
break;
|
||||
|
||||
case IFFUPJMPB:
|
||||
if (ttype(--luaD_stack.top) == LUA_T_NIL)
|
||||
pc -= *pc;
|
||||
else
|
||||
pc++;
|
||||
break;
|
||||
|
||||
case IFFUPJMP:
|
||||
skip_word(pc);
|
||||
if (ttype(--luaD_stack.top) == LUA_T_NIL)
|
||||
pc -= get_prevword(pc);
|
||||
pc -= get_word(pc);
|
||||
else
|
||||
skip_word(pc);
|
||||
break;
|
||||
|
||||
case CLOSURE:
|
||||
aux = get_word(pc); goto closure;
|
||||
aux = next_word(pc); goto closure;
|
||||
|
||||
case CLOSUREB:
|
||||
aux = *pc++;
|
||||
|
@ -617,7 +642,7 @@ StkId luaV_execute (Closure *cl, StkId base)
|
|||
return (base + ((aux==RETCODE) ? *pc : 0));
|
||||
|
||||
case SETLINE: {
|
||||
int line = get_word(pc);
|
||||
int line = next_word(pc);
|
||||
if ((luaD_stack.stack+base-1)->ttype != LUA_T_LINE) {
|
||||
/* open space for LINE value */
|
||||
luaD_openstack((luaD_stack.top-luaD_stack.stack)-base);
|
||||
|
|
Loading…
Reference in New Issue