From 9621add2918cc4943e6693b74ae85d51dd264fcf Mon Sep 17 00:00:00 2001 From: David Walter Seikel Date: Mon, 21 Apr 2014 20:59:39 +1000 Subject: We don't need the testlua directory any more. --- LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua | 1125 --------------------- 1 file changed, 1125 deletions(-) delete mode 100644 LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua (limited to 'LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua') diff --git a/LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua b/LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua deleted file mode 100644 index 4dc8548..0000000 --- a/LuaSL/testLua/yueliang-0.4.1/orig-5.1.3/lcode.lua +++ /dev/null @@ -1,1125 +0,0 @@ ---[[-------------------------------------------------------------------- - - lcode.lua - Lua 5 code generator in Lua - This file is part of Yueliang. - - Copyright (c) 2005-2007 Kein-Hong Man - The COPYRIGHT file describes the conditions - under which this software may be distributed. - - See the ChangeLog for more information. - -----------------------------------------------------------------------]] - ---[[-------------------------------------------------------------------- --- Notes: --- * one function manipulate a pointer argument with a simple data type --- (can't be emulated by a table, ambiguous), now returns that value: --- luaK:concat(fs, l1, l2) --- * luaM_growvector uses the faux luaY:growvector, for limit checking --- * some function parameters changed to boolean, additional code --- translates boolean back to 1/0 for instruction fields --- --- Not implemented: --- * NOTE there is a failed assert in luaK:addk, a porting problem --- --- Added: --- * constant MAXSTACK from llimits.h --- * luaK:ttisnumber(o) (from lobject.h) --- * luaK:nvalue(o) (from lobject.h) --- * luaK:setnilvalue(o) (from lobject.h) --- * luaK:setnvalue(o, x) (from lobject.h) --- * luaK:setbvalue(o, x) (from lobject.h) --- * luaK:sethvalue(o, x) (from lobject.h), parameter L deleted --- * luaK:setsvalue(o, x) (from lobject.h), parameter L deleted --- * luaK:numadd, luaK:numsub, luaK:nummul, luaK:numdiv, luaK:nummod, --- luaK:numpow, luaK:numunm, luaK:numisnan (from luaconf.h) --- * copyexp(e1, e2) added in luaK:posfix to copy expdesc struct --- --- Changed in 5.1.x: --- * enum BinOpr has a new entry, OPR_MOD --- * enum UnOpr has a new entry, OPR_LEN --- * binopistest, unused in 5.0.x, has been deleted --- * macro setmultret is new --- * functions isnumeral, luaK_ret, boolK are new --- * funcion nilK was named nil_constant in 5.0.x --- * function interface changed: need_value, patchtestreg, concat --- * TObject now a TValue --- * functions luaK_setreturns, luaK_setoneret are new --- * function luaK:setcallreturns deleted, to be replaced by: --- luaK:setmultret, luaK:ret, luaK:setreturns, luaK:setoneret --- * functions constfolding, codearith, codecomp are new --- * luaK:codebinop has been deleted --- * function luaK_setlist is new --- * OPR_MULT renamed to OPR_MUL -----------------------------------------------------------------------]] - --- requires luaP, luaX, luaY -luaK = {} - ------------------------------------------------------------------------- --- constants used by code generator ------------------------------------------------------------------------- --- maximum stack for a Lua function -luaK.MAXSTACK = 250 -- (from llimits.h) - ---[[-------------------------------------------------------------------- --- other functions -----------------------------------------------------------------------]] - ------------------------------------------------------------------------- --- emulation of TValue macros (these are from lobject.h) --- * TValue is a table since lcode passes references around --- * tt member field removed, using Lua's type() instead --- * for setsvalue, sethvalue, parameter L (deleted here) in lobject.h --- is used in an assert for testing, see checkliveness(g,obj) ------------------------------------------------------------------------- -function luaK:ttisnumber(o) - if o then return type(o.value) == "number" else return false end -end -function luaK:nvalue(o) return o.value end -function luaK:setnilvalue(o) o.value = nil end -function luaK:setsvalue(o, x) o.value = x end -luaK.setnvalue = luaK.setsvalue -luaK.sethvalue = luaK.setsvalue -luaK.setbvalue = luaK.setsvalue - ------------------------------------------------------------------------- --- The luai_num* macros define the primitive operations over numbers. --- * this is not the entire set of primitive operations from luaconf.h --- * used in luaK:constfolding() ------------------------------------------------------------------------- -function luaK:numadd(a, b) return a + b end -function luaK:numsub(a, b) return a - b end -function luaK:nummul(a, b) return a * b end -function luaK:numdiv(a, b) return a / b end -function luaK:nummod(a, b) return a % b end - -- ((a) - floor((a)/(b))*(b)) /* actual, for reference */ -function luaK:numpow(a, b) return a ^ b end -function luaK:numunm(a) return -a end -function luaK:numisnan(a) return not a == a end - -- a NaN cannot equal another NaN - ---[[-------------------------------------------------------------------- --- code generator functions -----------------------------------------------------------------------]] - ------------------------------------------------------------------------- --- Marks the end of a patch list. It is an invalid value both as an absolute --- address, and as a list link (would link an element to itself). ------------------------------------------------------------------------- -luaK.NO_JUMP = -1 - ------------------------------------------------------------------------- --- grep "ORDER OPR" if you change these enums ------------------------------------------------------------------------- -luaK.BinOpr = { - OPR_ADD = 0, OPR_SUB = 1, OPR_MUL = 2, OPR_DIV = 3, OPR_MOD = 4, OPR_POW = 5, - OPR_CONCAT = 6, - OPR_NE = 7, OPR_EQ = 8, - OPR_LT = 9, OPR_LE = 10, OPR_GT = 11, OPR_GE = 12, - OPR_AND = 13, OPR_OR = 14, - OPR_NOBINOPR = 15, -} - --- * UnOpr is used by luaK:prefix's op argument, but not directly used --- because the function receives the symbols as strings, e.g. "OPR_NOT" -luaK.UnOpr = { - OPR_MINUS = 0, OPR_NOT = 1, OPR_LEN = 2, OPR_NOUNOPR = 3 -} - ------------------------------------------------------------------------- --- returns the instruction object for given e (expdesc), was a macro ------------------------------------------------------------------------- -function luaK:getcode(fs, e) - return fs.f.code[e.info] -end - ------------------------------------------------------------------------- --- codes an instruction with a signed Bx (sBx) field, was a macro --- * used in luaK:jump(), (lparser) luaY:forbody() ------------------------------------------------------------------------- -function luaK:codeAsBx(fs, o, A, sBx) - return self:codeABx(fs, o, A, sBx + luaP.MAXARG_sBx) -end - ------------------------------------------------------------------------- --- set the expdesc e instruction for multiple returns, was a macro ------------------------------------------------------------------------- -function luaK:setmultret(fs, e) - self:setreturns(fs, e, luaY.LUA_MULTRET) -end - ------------------------------------------------------------------------- --- there is a jump if patch lists are not identical, was a macro --- * used in luaK:exp2reg(), luaK:exp2anyreg(), luaK:exp2val() ------------------------------------------------------------------------- -function luaK:hasjumps(e) - return e.t ~= e.f -end - ------------------------------------------------------------------------- --- true if the expression is a constant number (for constant folding) --- * used in constfolding(), infix() ------------------------------------------------------------------------- -function luaK:isnumeral(e) - return e.k == "VKNUM" and e.t == self.NO_JUMP and e.f == self.NO_JUMP -end - ------------------------------------------------------------------------- --- codes loading of nil, optimization done if consecutive locations --- * used in luaK:discharge2reg(), (lparser) luaY:adjust_assign() ------------------------------------------------------------------------- -function luaK:_nil(fs, from, n) - if fs.pc > fs.lasttarget then -- no jumps to current position? - if fs.pc == 0 then -- function start? - if from >= fs.nactvar then - return -- positions are already clean - end - else - local previous = fs.f.code[fs.pc - 1] - if luaP:GET_OPCODE(previous) == "OP_LOADNIL" then - local pfrom = luaP:GETARG_A(previous) - local pto = luaP:GETARG_B(previous) - if pfrom <= from and from <= pto + 1 then -- can connect both? - if from + n - 1 > pto then - luaP:SETARG_B(previous, from + n - 1) - end - return - end - end - end - end - self:codeABC(fs, "OP_LOADNIL", from, from + n - 1, 0) -- else no optimization -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:jump(fs) - local jpc = fs.jpc -- save list of jumps to here - fs.jpc = self.NO_JUMP - local j = self:codeAsBx(fs, "OP_JMP", 0, self.NO_JUMP) - j = self:concat(fs, j, jpc) -- keep them on hold - return j -end - ------------------------------------------------------------------------- --- codes a RETURN instruction --- * used in luaY:close_func(), luaY:retstat() ------------------------------------------------------------------------- -function luaK:ret(fs, first, nret) - self:codeABC(fs, "OP_RETURN", first, nret + 1, 0) -end - ------------------------------------------------------------------------- --- --- * used in luaK:jumponcond(), luaK:codecomp() ------------------------------------------------------------------------- -function luaK:condjump(fs, op, A, B, C) - self:codeABC(fs, op, A, B, C) - return self:jump(fs) -end - ------------------------------------------------------------------------- --- --- * used in luaK:patchlistaux(), luaK:concat() ------------------------------------------------------------------------- -function luaK:fixjump(fs, pc, dest) - local jmp = fs.f.code[pc] - local offset = dest - (pc + 1) - lua_assert(dest ~= self.NO_JUMP) - if math.abs(offset) > luaP.MAXARG_sBx then - luaX:syntaxerror(fs.ls, "control structure too long") - end - luaP:SETARG_sBx(jmp, offset) -end - ------------------------------------------------------------------------- --- returns current 'pc' and marks it as a jump target (to avoid wrong --- optimizations with consecutive instructions not in the same basic block). --- * used in multiple locations --- * fs.lasttarget tested only by luaK:_nil() when optimizing OP_LOADNIL ------------------------------------------------------------------------- -function luaK:getlabel(fs) - fs.lasttarget = fs.pc - return fs.pc -end - ------------------------------------------------------------------------- --- --- * used in luaK:need_value(), luaK:removevalues(), luaK:patchlistaux(), --- luaK:concat() ------------------------------------------------------------------------- -function luaK:getjump(fs, pc) - local offset = luaP:GETARG_sBx(fs.f.code[pc]) - if offset == self.NO_JUMP then -- point to itself represents end of list - return self.NO_JUMP -- end of list - else - return (pc + 1) + offset -- turn offset into absolute position - end -end - ------------------------------------------------------------------------- --- --- * used in luaK:need_value(), luaK:patchtestreg(), luaK:invertjump() ------------------------------------------------------------------------- -function luaK:getjumpcontrol(fs, pc) - local pi = fs.f.code[pc] - local ppi = fs.f.code[pc - 1] - if pc >= 1 and luaP:testTMode(luaP:GET_OPCODE(ppi)) ~= 0 then - return ppi - else - return pi - end -end - ------------------------------------------------------------------------- --- check whether list has any jump that do not produce a value --- (or produce an inverted value) --- * return value changed to boolean --- * used only in luaK:exp2reg() ------------------------------------------------------------------------- -function luaK:need_value(fs, list) - while list ~= self.NO_JUMP do - local i = self:getjumpcontrol(fs, list) - if luaP:GET_OPCODE(i) ~= "OP_TESTSET" then return true end - list = self:getjump(fs, list) - end - return false -- not found -end - ------------------------------------------------------------------------- --- --- * used in luaK:removevalues(), luaK:patchlistaux() ------------------------------------------------------------------------- -function luaK:patchtestreg(fs, node, reg) - local i = self:getjumpcontrol(fs, node) - if luaP:GET_OPCODE(i) ~= "OP_TESTSET" then - return false -- cannot patch other instructions - end - if reg ~= luaP.NO_REG and reg ~= luaP:GETARG_B(i) then - luaP:SETARG_A(i, reg) - else -- no register to put value or register already has the value - -- due to use of a table as i, i cannot be replaced by another table - -- so the following is required; there is no change to ARG_C - luaP:SET_OPCODE(i, "OP_TEST") - local b = luaP:GETARG_B(i) - luaP:SETARG_A(i, b) - luaP:SETARG_B(i, 0) - -- *i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i)); /* C */ - end - return true -end - ------------------------------------------------------------------------- --- --- * used only in luaK:codenot() ------------------------------------------------------------------------- -function luaK:removevalues(fs, list) - while list ~= self.NO_JUMP do - self:patchtestreg(fs, list, luaP.NO_REG) - list = self:getjump(fs, list) - end -end - ------------------------------------------------------------------------- --- --- * used in luaK:dischargejpc(), luaK:patchlist(), luaK:exp2reg() ------------------------------------------------------------------------- -function luaK:patchlistaux(fs, list, vtarget, reg, dtarget) - while list ~= self.NO_JUMP do - local _next = self:getjump(fs, list) - if self:patchtestreg(fs, list, reg) then - self:fixjump(fs, list, vtarget) - else - self:fixjump(fs, list, dtarget) -- jump to default target - end - list = _next - end -end - ------------------------------------------------------------------------- --- --- * used only in luaK:code() ------------------------------------------------------------------------- -function luaK:dischargejpc(fs) - self:patchlistaux(fs, fs.jpc, fs.pc, luaP.NO_REG, fs.pc) - fs.jpc = self.NO_JUMP -end - ------------------------------------------------------------------------- --- --- * used in (lparser) luaY:whilestat(), luaY:repeatstat(), luaY:forbody() ------------------------------------------------------------------------- -function luaK:patchlist(fs, list, target) - if target == fs.pc then - self:patchtohere(fs, list) - else - lua_assert(target < fs.pc) - self:patchlistaux(fs, list, target, luaP.NO_REG, target) - end -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:patchtohere(fs, list) - self:getlabel(fs) - fs.jpc = self:concat(fs, fs.jpc, list) -end - ------------------------------------------------------------------------- --- * l1 was a pointer, now l1 is returned and callee assigns the value --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:concat(fs, l1, l2) - if l2 == self.NO_JUMP then return l1 - elseif l1 == self.NO_JUMP then - return l2 - else - local list = l1 - local _next = self:getjump(fs, list) - while _next ~= self.NO_JUMP do -- find last element - list = _next - _next = self:getjump(fs, list) - end - self:fixjump(fs, list, l2) - end - return l1 -end - ------------------------------------------------------------------------- --- --- * used in luaK:reserveregs(), (lparser) luaY:forlist() ------------------------------------------------------------------------- -function luaK:checkstack(fs, n) - local newstack = fs.freereg + n - if newstack > fs.f.maxstacksize then - if newstack >= self.MAXSTACK then - luaX:syntaxerror(fs.ls, "function or expression too complex") - end - fs.f.maxstacksize = newstack - end -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:reserveregs(fs, n) - self:checkstack(fs, n) - fs.freereg = fs.freereg + n -end - ------------------------------------------------------------------------- --- --- * used in luaK:freeexp(), luaK:dischargevars() ------------------------------------------------------------------------- -function luaK:freereg(fs, reg) - if not luaP:ISK(reg) and reg >= fs.nactvar then - fs.freereg = fs.freereg - 1 - lua_assert(reg == fs.freereg) - end -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:freeexp(fs, e) - if e.k == "VNONRELOC" then - self:freereg(fs, e.info) - end -end - ------------------------------------------------------------------------- --- * TODO NOTE implementation is not 100% correct, since the assert fails --- * luaH_set, setobj deleted; direct table access used instead --- * used in luaK:stringK(), luaK:numberK(), luaK:boolK(), luaK:nilK() ------------------------------------------------------------------------- -function luaK:addk(fs, k, v) - local L = fs.L - local idx = fs.h[k.value] - --TValue *idx = luaH_set(L, fs->h, k); /* C */ - local f = fs.f - if self:ttisnumber(idx) then - --TODO this assert currently FAILS (last tested for 5.0.2) - --lua_assert(fs.f.k[self:nvalue(idx)] == v) - --lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v)); /* C */ - return self:nvalue(idx) - else -- constant not found; create a new entry - idx = {} - self:setnvalue(idx, fs.nk) - fs.h[k.value] = idx - -- setnvalue(idx, cast_num(fs->nk)); /* C */ - luaY:growvector(L, f.k, fs.nk, f.sizek, nil, - luaP.MAXARG_Bx, "constant table overflow") - -- loop to initialize empty f.k positions not required - f.k[fs.nk] = v - -- setobj(L, &f->k[fs->nk], v); /* C */ - -- luaC_barrier(L, f, v); /* GC */ - local nk = fs.nk - fs.nk = fs.nk + 1 - return nk - end - -end - ------------------------------------------------------------------------- --- creates and sets a string object --- * used in (lparser) luaY:codestring(), luaY:singlevar() ------------------------------------------------------------------------- -function luaK:stringK(fs, s) - local o = {} -- TValue - self:setsvalue(o, s) - return self:addk(fs, o, o) -end - ------------------------------------------------------------------------- --- creates and sets a number object --- * used in luaK:prefix() for negative (or negation of) numbers --- * used in (lparser) luaY:simpleexp(), luaY:fornum() ------------------------------------------------------------------------- -function luaK:numberK(fs, r) - local o = {} -- TValue - self:setnvalue(o, r) - return self:addk(fs, o, o) -end - ------------------------------------------------------------------------- --- creates and sets a boolean object --- * used only in luaK:exp2RK() ------------------------------------------------------------------------- -function luaK:boolK(fs, b) - local o = {} -- TValue - self:setbvalue(o, b) - return self:addk(fs, o, o) -end - ------------------------------------------------------------------------- --- creates and sets a nil object --- * used only in luaK:exp2RK() ------------------------------------------------------------------------- -function luaK:nilK(fs) - local k, v = {}, {} -- TValue - self:setnilvalue(v) - -- cannot use nil as key; instead use table itself to represent nil - self:sethvalue(k, fs.h) - return self:addk(fs, k, v) -end - ------------------------------------------------------------------------- --- --- * used in luaK:setmultret(), (lparser) luaY:adjust_assign() ------------------------------------------------------------------------- -function luaK:setreturns(fs, e, nresults) - if e.k == "VCALL" then -- expression is an open function call? - luaP:SETARG_C(self:getcode(fs, e), nresults + 1) - elseif e.k == "VVARARG" then - luaP:SETARG_B(self:getcode(fs, e), nresults + 1); - luaP:SETARG_A(self:getcode(fs, e), fs.freereg); - luaK:reserveregs(fs, 1) - end -end - ------------------------------------------------------------------------- --- --- * used in luaK:dischargevars(), (lparser) luaY:assignment() ------------------------------------------------------------------------- -function luaK:setoneret(fs, e) - if e.k == "VCALL" then -- expression is an open function call? - e.k = "VNONRELOC" - e.info = luaP:GETARG_A(self:getcode(fs, e)) - elseif e.k == "VVARARG" then - luaP:SETARG_B(self:getcode(fs, e), 2) - e.k = "VRELOCABLE" -- can relocate its simple result - end -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:dischargevars(fs, e) - local k = e.k - if k == "VLOCAL" then - e.k = "VNONRELOC" - elseif k == "VUPVAL" then - e.info = self:codeABC(fs, "OP_GETUPVAL", 0, e.info, 0) - e.k = "VRELOCABLE" - elseif k == "VGLOBAL" then - e.info = self:codeABx(fs, "OP_GETGLOBAL", 0, e.info) - e.k = "VRELOCABLE" - elseif k == "VINDEXED" then - self:freereg(fs, e.aux) - self:freereg(fs, e.info) - e.info = self:codeABC(fs, "OP_GETTABLE", 0, e.info, e.aux) - e.k = "VRELOCABLE" - elseif k == "VVARARG" or k == "VCALL" then - self:setoneret(fs, e) - else - -- there is one value available (somewhere) - end -end - ------------------------------------------------------------------------- --- --- * used only in luaK:exp2reg() ------------------------------------------------------------------------- -function luaK:code_label(fs, A, b, jump) - self:getlabel(fs) -- those instructions may be jump targets - return self:codeABC(fs, "OP_LOADBOOL", A, b, jump) -end - ------------------------------------------------------------------------- --- --- * used in luaK:discharge2anyreg(), luaK:exp2reg() ------------------------------------------------------------------------- -function luaK:discharge2reg(fs, e, reg) - self:dischargevars(fs, e) - local k = e.k - if k == "VNIL" then - self:_nil(fs, reg, 1) - elseif k == "VFALSE" or k == "VTRUE" then - self:codeABC(fs, "OP_LOADBOOL", reg, (e.k == "VTRUE") and 1 or 0, 0) - elseif k == "VK" then - self:codeABx(fs, "OP_LOADK", reg, e.info) - elseif k == "VKNUM" then - self:codeABx(fs, "OP_LOADK", reg, self:numberK(fs, e.nval)) - elseif k == "VRELOCABLE" then - local pc = self:getcode(fs, e) - luaP:SETARG_A(pc, reg) - elseif k == "VNONRELOC" then - if reg ~= e.info then - self:codeABC(fs, "OP_MOVE", reg, e.info, 0) - end - else - lua_assert(e.k == "VVOID" or e.k == "VJMP") - return -- nothing to do... - end - e.info = reg - e.k = "VNONRELOC" -end - ------------------------------------------------------------------------- --- --- * used in luaK:jumponcond(), luaK:codenot() ------------------------------------------------------------------------- -function luaK:discharge2anyreg(fs, e) - if e.k ~= "VNONRELOC" then - self:reserveregs(fs, 1) - self:discharge2reg(fs, e, fs.freereg - 1) - end -end - ------------------------------------------------------------------------- --- --- * used in luaK:exp2nextreg(), luaK:exp2anyreg(), luaK:storevar() ------------------------------------------------------------------------- -function luaK:exp2reg(fs, e, reg) - self:discharge2reg(fs, e, reg) - if e.k == "VJMP" then - e.t = self:concat(fs, e.t, e.info) -- put this jump in 't' list - end - if self:hasjumps(e) then - local final -- position after whole expression - local p_f = self.NO_JUMP -- position of an eventual LOAD false - local p_t = self.NO_JUMP -- position of an eventual LOAD true - if self:need_value(fs, e.t) or self:need_value(fs, e.f) then - local fj = (e.k == "VJMP") and self.NO_JUMP or self:jump(fs) - p_f = self:code_label(fs, reg, 0, 1) - p_t = self:code_label(fs, reg, 1, 0) - self:patchtohere(fs, fj) - end - final = self:getlabel(fs) - self:patchlistaux(fs, e.f, final, reg, p_f) - self:patchlistaux(fs, e.t, final, reg, p_t) - end - e.f, e.t = self.NO_JUMP, self.NO_JUMP - e.info = reg - e.k = "VNONRELOC" -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:exp2nextreg(fs, e) - self:dischargevars(fs, e) - self:freeexp(fs, e) - self:reserveregs(fs, 1) - self:exp2reg(fs, e, fs.freereg - 1) -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:exp2anyreg(fs, e) - self:dischargevars(fs, e) - if e.k == "VNONRELOC" then - if not self:hasjumps(e) then -- exp is already in a register - return e.info - end - if e.info >= fs.nactvar then -- reg. is not a local? - self:exp2reg(fs, e, e.info) -- put value on it - return e.info - end - end - self:exp2nextreg(fs, e) -- default - return e.info -end - ------------------------------------------------------------------------- --- --- * used in luaK:exp2RK(), luaK:prefix(), luaK:posfix() --- * used in (lparser) luaY:yindex() ------------------------------------------------------------------------- -function luaK:exp2val(fs, e) - if self:hasjumps(e) then - self:exp2anyreg(fs, e) - else - self:dischargevars(fs, e) - end -end - ------------------------------------------------------------------------- --- --- * used in multiple locations ------------------------------------------------------------------------- -function luaK:exp2RK(fs, e) - self:exp2val(fs, e) - local k = e.k - if k == "VKNUM" or k == "VTRUE" or k == "VFALSE" or k == "VNIL" then - if fs.nk <= luaP.MAXINDEXRK then -- constant fit in RK operand? - -- converted from a 2-deep ternary operator expression - if e.k == "VNIL" then - e.info = self:nilK(fs) - else - e.info = (e.k == "VKNUM") and self:numberK(fs, e.nval) - or self:boolK(fs, e.k == "VTRUE") - end - e.k = "VK" - return luaP:RKASK(e.info) - end - elseif k == "VK" then - if e.info <= luaP.MAXINDEXRK then -- constant fit in argC? - return luaP:RKASK(e.info) - end - else - -- default - end - -- not a constant in the right range: put it in a register - return self:exp2anyreg(fs, e) -end - ------------------------------------------------------------------------- --- --- * used in (lparser) luaY:assignment(), luaY:localfunc(), luaY:funcstat() ------------------------------------------------------------------------- -function luaK:storevar(fs, var, ex) - local k = var.k - if k == "VLOCAL" then - self:freeexp(fs, ex) - self:exp2reg(fs, ex, var.info) - return - elseif k == "VUPVAL" then - local e = self:exp2anyreg(fs, ex) - self:codeABC(fs, "OP_SETUPVAL", e, var.info, 0) - elseif k == "VGLOBAL" then - local e = self:exp2anyreg(fs, ex) - self:codeABx(fs, "OP_SETGLOBAL", e, var.info) - elseif k == "VINDEXED" then - local e = self:exp2RK(fs, ex) - self:codeABC(fs, "OP_SETTABLE", var.info, var.aux, e) - else - lua_assert(0) -- invalid var kind to store - end - self:freeexp(fs, ex) -end - ------------------------------------------------------------------------- --- --- * used only in (lparser) luaY:primaryexp() ------------------------------------------------------------------------- -function luaK:_self(fs, e, key) - self:exp2anyreg(fs, e) - self:freeexp(fs, e) - local func = fs.freereg - self:reserveregs(fs, 2) - self:codeABC(fs, "OP_SELF", func, e.info, self:exp2RK(fs, key)) - self:freeexp(fs, key) - e.info = func - e.k = "VNONRELOC" -end - ------------------------------------------------------------------------- --- --- * used in luaK:goiftrue(), luaK:codenot() ------------------------------------------------------------------------- -function luaK:invertjump(fs, e) - local pc = self:getjumpcontrol(fs, e.info) - lua_assert(luaP:testTMode(luaP:GET_OPCODE(pc)) ~= 0 and - luaP:GET_OPCODE(pc) ~= "OP_TESTSET" and - luaP:GET_OPCODE(pc) ~= "OP_TEST") - luaP:SETARG_A(pc, (luaP:GETARG_A(pc) == 0) and 1 or 0) -end - ------------------------------------------------------------------------- --- --- * used in luaK:goiftrue(), luaK:goiffalse() ------------------------------------------------------------------------- -function luaK:jumponcond(fs, e, cond) - if e.k == "VRELOCABLE" then - local ie = self:getcode(fs, e) - if luaP:GET_OPCODE(ie) == "OP_NOT" then - fs.pc = fs.pc - 1 -- remove previous OP_NOT - return self:condjump(fs, "OP_TEST", luaP:GETARG_B(ie), 0, cond and 0 or 1) - end - -- else go through - end - self:discharge2anyreg(fs, e) - self:freeexp(fs, e) - return self:condjump(fs, "OP_TESTSET", luaP.NO_REG, e.info, cond and 1 or 0) -end - ------------------------------------------------------------------------- --- --- * used in luaK:infix(), (lparser) luaY:cond() ------------------------------------------------------------------------- -function luaK:goiftrue(fs, e) - local pc -- pc of last jump - self:dischargevars(fs, e) - local k = e.k - if k == "VK" or k == "VKNUM" or k == "VTRUE" then - pc = self.NO_JUMP -- always true; do nothing - elseif k == "VFALSE" then - pc = self:jump(fs) -- always jump - elseif k == "VJMP" then - self:invertjump(fs, e) - pc = e.info - else - pc = self:jumponcond(fs, e, false) - end - e.f = self:concat(fs, e.f, pc) -- insert last jump in `f' list - self:patchtohere(fs, e.t) - e.t = self.NO_JUMP -end - ------------------------------------------------------------------------- --- --- * used in luaK:infix() ------------------------------------------------------------------------- -function luaK:goiffalse(fs, e) - local pc -- pc of last jump - self:dischargevars(fs, e) - local k = e.k - if k == "VNIL" or k == "VFALSE"then - pc = self.NO_JUMP -- always false; do nothing - elseif k == "VTRUE" then - pc = self:jump(fs) -- always jump - elseif k == "VJMP" then - pc = e.info - else - pc = self:jumponcond(fs, e, true) - end - e.t = self:concat(fs, e.t, pc) -- insert last jump in `t' list - self:patchtohere(fs, e.f) - e.f = self.NO_JUMP -end - ------------------------------------------------------------------------- --- --- * used only in luaK:prefix() ------------------------------------------------------------------------- -function luaK:codenot(fs, e) - self:dischargevars(fs, e) - local k = e.k - if k == "VNIL" or k == "VFALSE" then - e.k = "VTRUE" - elseif k == "VK" or k == "VKNUM" or k == "VTRUE" then - e.k = "VFALSE" - elseif k == "VJMP" then - self:invertjump(fs, e) - elseif k == "VRELOCABLE" or k == "VNONRELOC" then - self:discharge2anyreg(fs, e) - self:freeexp(fs, e) - e.info = self:codeABC(fs, "OP_NOT", 0, e.info, 0) - e.k = "VRELOCABLE" - else - lua_assert(0) -- cannot happen - end - -- interchange true and false lists - e.f, e.t = e.t, e.f - self:removevalues(fs, e.f) - self:removevalues(fs, e.t) -end - ------------------------------------------------------------------------- --- --- * used in (lparser) luaY:field(), luaY:primaryexp() ------------------------------------------------------------------------- -function luaK:indexed(fs, t, k) - t.aux = self:exp2RK(fs, k) - t.k = "VINDEXED" -end - ------------------------------------------------------------------------- --- --- * used only in luaK:codearith() ------------------------------------------------------------------------- -function luaK:constfolding(op, e1, e2) - local r - if not self:isnumeral(e1) or not self:isnumeral(e2) then return false end - local v1 = e1.nval - local v2 = e2.nval - if op == "OP_ADD" then - r = self:numadd(v1, v2) - elseif op == "OP_SUB" then - r = self:numsub(v1, v2) - elseif op == "OP_MUL" then - r = self:nummul(v1, v2) - elseif op == "OP_DIV" then - if v2 == 0 then return false end -- do not attempt to divide by 0 - r = self:numdiv(v1, v2) - elseif op == "OP_MOD" then - if v2 == 0 then return false end -- do not attempt to divide by 0 - r = self:nummod(v1, v2) - elseif op == "OP_POW" then - r = self:numpow(v1, v2) - elseif op == "OP_UNM" then - r = self:numunm(v1) - elseif op == "OP_LEN" then - return false -- no constant folding for 'len' - else - lua_assert(0) - r = 0 - end - if self:numisnan(r) then return false end -- do not attempt to produce NaN - e1.nval = r - return true -end - ------------------------------------------------------------------------- --- --- * used in luaK:prefix(), luaK:posfix() ------------------------------------------------------------------------- -function luaK:codearith(fs, op, e1, e2) - if self:constfolding(op, e1, e2) then - return - else - local o2 = (op ~= "OP_UNM" and op ~= "OP_LEN") and self:exp2RK(fs, e2) or 0 - local o1 = self:exp2RK(fs, e1) - if o1 > o2 then - self:freeexp(fs, e1) - self:freeexp(fs, e2) - else - self:freeexp(fs, e2) - self:freeexp(fs, e1) - end - e1.info = self:codeABC(fs, op, 0, o1, o2) - e1.k = "VRELOCABLE" - end -end - ------------------------------------------------------------------------- --- --- * used only in luaK:posfix() ------------------------------------------------------------------------- -function luaK:codecomp(fs, op, cond, e1, e2) - local o1 = self:exp2RK(fs, e1) - local o2 = self:exp2RK(fs, e2) - self:freeexp(fs, e2) - self:freeexp(fs, e1) - if cond == 0 and op ~= "OP_EQ" then - -- exchange args to replace by `<' or `<=' - o1, o2 = o2, o1 -- o1 <==> o2 - cond = 1 - end - e1.info = self:condjump(fs, op, cond, o1, o2) - e1.k = "VJMP" -end - ------------------------------------------------------------------------- --- --- * used only in (lparser) luaY:subexpr() ------------------------------------------------------------------------- -function luaK:prefix(fs, op, e) - local e2 = {} -- expdesc - e2.t, e2.f = self.NO_JUMP, self.NO_JUMP - e2.k = "VKNUM" - e2.nval = 0 - if op == "OPR_MINUS" then - if not self:isnumeral(e) then - self:exp2anyreg(fs, e) -- cannot operate on non-numeric constants - end - self:codearith(fs, "OP_UNM", e, e2) - elseif op == "OPR_NOT" then - self:codenot(fs, e) - elseif op == "OPR_LEN" then - self:exp2anyreg(fs, e) -- cannot operate on constants - self:codearith(fs, "OP_LEN", e, e2) - else - lua_assert(0) - end -end - ------------------------------------------------------------------------- --- --- * used only in (lparser) luaY:subexpr() ------------------------------------------------------------------------- -function luaK:infix(fs, op, v) - if op == "OPR_AND" then - self:goiftrue(fs, v) - elseif op == "OPR_OR" then - self:goiffalse(fs, v) - elseif op == "OPR_CONCAT" then - self:exp2nextreg(fs, v) -- operand must be on the 'stack' - elseif op == "OPR_ADD" or op == "OPR_SUB" or - op == "OPR_MUL" or op == "OPR_DIV" or - op == "OPR_MOD" or op == "OPR_POW" then - if not self:isnumeral(v) then self:exp2RK(fs, v) end - else - self:exp2RK(fs, v) - end -end - ------------------------------------------------------------------------- --- --- * used only in (lparser) luaY:subexpr() ------------------------------------------------------------------------- --- table lookups to simplify testing -luaK.arith_op = { - OPR_ADD = "OP_ADD", OPR_SUB = "OP_SUB", OPR_MUL = "OP_MUL", - OPR_DIV = "OP_DIV", OPR_MOD = "OP_MOD", OPR_POW = "OP_POW", -} -luaK.comp_op = { - OPR_EQ = "OP_EQ", OPR_NE = "OP_EQ", OPR_LT = "OP_LT", - OPR_LE = "OP_LE", OPR_GT = "OP_LT", OPR_GE = "OP_LE", -} -luaK.comp_cond = { - OPR_EQ = 1, OPR_NE = 0, OPR_LT = 1, - OPR_LE = 1, OPR_GT = 0, OPR_GE = 0, -} -function luaK:posfix(fs, op, e1, e2) - -- needed because e1 = e2 doesn't copy values... - -- * in 5.0.x, only k/info/aux/t/f copied, t for AND, f for OR - -- but here, all elements are copied for completeness' sake - local function copyexp(e1, e2) - e1.k = e2.k - e1.info = e2.info; e1.aux = e2.aux - e1.nval = e2.nval - e1.t = e2.t; e1.f = e2.f - end - if op == "OPR_AND" then - lua_assert(e1.t == self.NO_JUMP) -- list must be closed - self:dischargevars(fs, e2) - e2.f = self:concat(fs, e2.f, e1.f) - copyexp(e1, e2) - elseif op == "OPR_OR" then - lua_assert(e1.f == self.NO_JUMP) -- list must be closed - self:dischargevars(fs, e2) - e2.t = self:concat(fs, e2.t, e1.t) - copyexp(e1, e2) - elseif op == "OPR_CONCAT" then - self:exp2val(fs, e2) - if e2.k == "VRELOCABLE" and luaP:GET_OPCODE(self:getcode(fs, e2)) == "OP_CONCAT" then - lua_assert(e1.info == luaP:GETARG_B(self:getcode(fs, e2)) - 1) - self:freeexp(fs, e1) - luaP:SETARG_B(self:getcode(fs, e2), e1.info) - e1.k = "VRELOCABLE" - e1.info = e2.info - else - self:exp2nextreg(fs, e2) -- operand must be on the 'stack' - self:codearith(fs, "OP_CONCAT", e1, e2) - end - else - -- the following uses a table lookup in place of conditionals - local arith = self.arith_op[op] - if arith then - self:codearith(fs, arith, e1, e2) - else - local comp = self.comp_op[op] - if comp then - self:codecomp(fs, comp, self.comp_cond[op], e1, e2) - else - lua_assert(0) - end - end--if arith - end--if op -end - ------------------------------------------------------------------------- --- adjusts debug information for last instruction written, in order to --- change the line where item comes into existence --- * used in (lparser) luaY:funcargs(), luaY:forbody(), luaY:funcstat() ------------------------------------------------------------------------- -function luaK:fixline(fs, line) - fs.f.lineinfo[fs.pc - 1] = line -end - ------------------------------------------------------------------------- --- general function to write an instruction into the instruction buffer, --- sets debug information too --- * used in luaK:codeABC(), luaK:codeABx() --- * called directly by (lparser) luaY:whilestat() ------------------------------------------------------------------------- -function luaK:code(fs, i, line) - local f = fs.f - self:dischargejpc(fs) -- 'pc' will change - -- put new instruction in code array - luaY:growvector(fs.L, f.code, fs.pc, f.sizecode, nil, - luaY.MAX_INT, "code size overflow") - f.code[fs.pc] = i - -- save corresponding line information - luaY:growvector(fs.L, f.lineinfo, fs.pc, f.sizelineinfo, nil, - luaY.MAX_INT, "code size overflow") - f.lineinfo[fs.pc] = line - local pc = fs.pc - fs.pc = fs.pc + 1 - return pc -end - ------------------------------------------------------------------------- --- writes an instruction of type ABC --- * calls luaK:code() ------------------------------------------------------------------------- -function luaK:codeABC(fs, o, a, b, c) - lua_assert(luaP:getOpMode(o) == luaP.OpMode.iABC) - lua_assert(luaP:getBMode(o) ~= luaP.OpArgMask.OpArgN or b == 0) - lua_assert(luaP:getCMode(o) ~= luaP.OpArgMask.OpArgN or c == 0) - return self:code(fs, luaP:CREATE_ABC(o, a, b, c), fs.ls.lastline) -end - ------------------------------------------------------------------------- --- writes an instruction of type ABx --- * calls luaK:code(), called by luaK:codeAsBx() ------------------------------------------------------------------------- -function luaK:codeABx(fs, o, a, bc) - lua_assert(luaP:getOpMode(o) == luaP.OpMode.iABx or - luaP:getOpMode(o) == luaP.OpMode.iAsBx) - lua_assert(luaP:getCMode(o) == luaP.OpArgMask.OpArgN) - return self:code(fs, luaP:CREATE_ABx(o, a, bc), fs.ls.lastline) -end - ------------------------------------------------------------------------- --- --- * used in (lparser) luaY:closelistfield(), luaY:lastlistfield() ------------------------------------------------------------------------- -function luaK:setlist(fs, base, nelems, tostore) - local c = math.floor((nelems - 1)/luaP.LFIELDS_PER_FLUSH) + 1 - local b = (tostore == luaY.LUA_MULTRET) and 0 or tostore - lua_assert(tostore ~= 0) - if c <= luaP.MAXARG_C then - self:codeABC(fs, "OP_SETLIST", base, b, c) - else - self:codeABC(fs, "OP_SETLIST", base, b, 0) - self:code(fs, luaP:CREATE_Inst(c), fs.ls.lastline) - end - fs.freereg = base + 1 -- free registers with list values -end - -- cgit v1.1