зеркало из https://github.com/mozilla/pjs.git
Began moving away from variables, fixed compare/branch ordering.
Testcases working.
This commit is contained in:
rogerl%netscape.com
Родитель
d982d960b5
Коммит
7b7fc3829f
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@ -91,22 +91,6 @@ namespace ICG {
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/********************************************************************/
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Register ICodeGenerator::loadVariable(uint32 frameIndex)
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{
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markMaxVariable(frameIndex);
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Register dest = getRegister();
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LoadVar *instr = new LoadVar(dest, frameIndex);
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iCode->push_back(instr);
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return dest;
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}
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void ICodeGenerator::saveVariable(uint32 frameIndex, Register value)
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{
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markMaxVariable(frameIndex);
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SaveVar *instr = new SaveVar(frameIndex, value);
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iCode->push_back(instr);
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}
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Register ICodeGenerator::loadImmediate(double value)
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{
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Register dest = getRegister();
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@ -183,6 +167,12 @@ namespace ICG {
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return dest;
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}
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void ICodeGenerator::move(Register destination, Register source)
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{
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Move *instr = new Move(destination, source);
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iCode->push_back(instr);
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}
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Register ICodeGenerator::op(ICodeOp op, Register source1,
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Register source2)
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{
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@ -638,4 +628,4 @@ namespace ICG {
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} // namespace ICG
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} // namespace JavaScript
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}; // namespace JavaScript
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@ -107,10 +107,11 @@ namespace ICG {
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{ if (variableIndex > maxVariable) maxVariable = variableIndex; }
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Register topRegister;
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Register registerBase;
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Register getRegister() \
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{ return topRegister++; }
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void resetTopRegister() \
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{ markMaxRegister(); topRegister = stitcher.empty() ? 0 : \
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{ markMaxRegister(); topRegister = stitcher.empty() ? registerBase : \
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stitcher.back()->registerBase; }
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ICodeOp getBranchOp() \
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@ -126,7 +127,7 @@ namespace ICG {
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void branchConditional(Label *label, Register condition);
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public:
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ICodeGenerator() : topRegister(0), maxRegister(0),
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ICodeGenerator() : topRegister(0), registerBase(0), maxRegister(0),
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maxVariable(0) \
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{ iCode = new InstructionStream(); }
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@ -135,12 +136,17 @@ namespace ICG {
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void mergeStream(InstructionStream *sideStream);
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ICodeModule *complete();
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Register allocateVariable(StringAtom &name)
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{ Register result = getRegister(); registerBase = topRegister; return result; }
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Formatter& print(Formatter& f);
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Register op(ICodeOp op, Register source);
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Register op(ICodeOp op, Register source1, Register source2);
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Register call(Register target, RegisterList args);
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void move(Register destination, Register source);
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Register compare(ICodeOp op, Register source1, Register source2);
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@ -51,6 +51,7 @@ static void initConsole(StringPtr consoleName,
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argc = 1;
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argv = mac_argv;
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}
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#endif
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namespace JavaScript {
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@ -287,43 +288,41 @@ namespace JavaScript {
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uint32 pos = 0;
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ICodeGenerator icg;
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// var i,j; i = j + 2;
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// var i,j;
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// i is bound to var #0, j to var #1
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Register r_i = icg.allocateVariable(world.identifiers[widenCString("i")]);
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Register r_j = icg.allocateVariable(world.identifiers[widenCString("j")]);
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// i = j + 2;
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icg.beginStatement(pos);
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Register r1 = icg.loadVariable(1);
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Register r2 = icg.loadImmediate(2.0);
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icg.saveVariable(0, icg.op(ADD, r1, r2));
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Register r1 = icg.loadImmediate(2.0);
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icg.move(r_i, icg.op(ADD, r_i, r_j));
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// j = a.b
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icg.beginStatement(pos);
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Register r4 = icg.loadName(world.identifiers[widenCString("a")]);
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Register r5 = icg.getProperty(r4, world.identifiers[widenCString("b")]);
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icg.saveVariable(1, r5);
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r1 = icg.loadName(world.identifiers[widenCString("a")]);
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r1 = icg.getProperty(r1, world.identifiers[widenCString("b")]);
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icg.move(r_j, r1);
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// while (i) i = i + j;
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icg.beginWhileStatement(pos);
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r1 = icg.loadVariable(0);
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icg.endWhileExpression(r1);
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icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadVariable(1)));
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icg.endWhileExpression(r_i);
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icg.move(r_i, icg.op(ADD, r_i, r_j));
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icg.endWhileStatement();
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// if (i) if (j) i = 3; else j = 4;
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r1 = icg.loadVariable(0);
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icg.beginIfStatement(pos, r1);
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r2 = icg.loadVariable(1);
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icg.beginIfStatement(pos, r2);
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icg.saveVariable(0, icg.loadImmediate(3));
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icg.beginIfStatement(pos, r_i);
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icg.beginIfStatement(pos, r_j);
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icg.move(r_i, icg.loadImmediate(3));
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icg.beginElseStatement(true);
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icg.saveVariable(1, icg.loadImmediate(4));
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icg.move(r_j, icg.loadImmediate(4));
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icg.endIfStatement();
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icg.beginElseStatement(false);
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icg.endIfStatement();
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// switch (i) { case 3: case 4: j = 4; break; case 5: j = 5; break; default : j = 6; }
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r1 = icg.loadVariable(0);
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icg.beginSwitchStatement(pos, r1);
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icg.beginSwitchStatement(pos, r_i);
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// case 3, note empty case statement (?necessary???)
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icg.endCaseCondition(icg.loadImmediate(3));
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icg.beginCaseStatement();
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@ -332,30 +331,29 @@ namespace JavaScript {
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icg.endCaseCondition(icg.loadImmediate(4));
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icg.beginCaseStatement();
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icg.beginStatement(pos);
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icg.saveVariable(1, icg.loadImmediate(4));
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icg.move(r_j, icg.loadImmediate(4));
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icg.breakStatement();
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icg.endCaseStatement();
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// case 5
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icg.endCaseCondition(icg.loadImmediate(5));
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icg.beginCaseStatement();
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icg.beginStatement(pos);
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icg.saveVariable(1, icg.loadImmediate(5));
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icg.move(r_j, icg.loadImmediate(5));
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icg.breakStatement();
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icg.endCaseStatement();
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// default
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icg.beginDefaultStatement();
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icg.beginStatement(pos);
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icg.saveVariable(1, icg.loadImmediate(6));
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icg.move(r_j, icg.loadImmediate(6));
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icg.endDefaultStatement();
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icg.endSwitchStatement();
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// for ( ; i; i + 1 ) j = 99;
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// for ( ; i; i = i + 1 ) j = 99;
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icg.beginForStatement(pos);
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r1 = icg.loadVariable(0);
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icg.forCondition(r1);
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icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadImmediate(1)));
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icg.forCondition(r_i);
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icg.move(r_i, icg.op(ADD, r_i, icg.loadImmediate(1)));
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icg.forIncrement();
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icg.saveVariable(0, icg.loadImmediate(99));
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icg.move(r_j, icg.loadImmediate(99));
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icg.endForStatement();
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ICodeModule *icm = icg.complete();
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@ -374,11 +372,12 @@ namespace JavaScript {
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ICodeGenerator fun;
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// function sum(n) { if (n > 1) return 1 + sum(n - 1); else return 1; }
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// n is bound to var #0.
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Register r_n = fun.allocateVariable(world.identifiers[widenCString("n")]);
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fun.beginStatement(position);
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Register r1 = fun.op(COMPARE_GT, fun.loadVariable(0), fun.loadImmediate(1.0));
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Register r1 = fun.op(COMPARE_GT, r_n, fun.loadImmediate(1.0));
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fun.beginIfStatement(position, r1);
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fun.beginStatement(position);
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r1 = fun.op(SUBTRACT, fun.loadVariable(0), fun.loadImmediate(1.0));
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r1 = fun.op(SUBTRACT, r_n, fun.loadImmediate(1.0));
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RegisterList args(1);
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args[0] = r1;
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r1 = fun.call(fun.loadName(sum), args);
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@ -419,11 +418,12 @@ namespace JavaScript {
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ICodeGenerator icg;
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// fact(n) {
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// n is bound to var #0.
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// var result = 1;
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// result is bound to var #1.
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Register r_n = icg.allocateVariable(world.identifiers[widenCString("n")]);
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Register r_result = icg.allocateVariable(world.identifiers[widenCString("result")]);
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icg.beginStatement(position);
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icg.saveVariable(1, icg.loadImmediate(1.0));
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icg.move(r_result, icg.loadImmediate(1.0));
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// while (n > 1) {
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// result = result * n;
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@ -431,24 +431,20 @@ namespace JavaScript {
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// }
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{
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icg.beginWhileStatement(position);
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Register r0 = icg.loadVariable(0);
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Register r1 = icg.loadImmediate(1.0);
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Register r2 = icg.op(COMPARE_GT, r0, r1);
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Register r2 = icg.op(COMPARE_GT, r_n, r1);
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icg.endWhileExpression(r2);
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r0 = icg.loadVariable(0);
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r1 = icg.loadVariable(1);
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r2 = icg.op(MULTIPLY, r1, r0);
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icg.saveVariable(1, r2);
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r2 = icg.op(MULTIPLY, r_result, r_n);
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icg.move(r_result, r2);
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icg.beginStatement(position);
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r0 = icg.loadVariable(0);
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r1 = icg.loadImmediate(1.0);
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r2 = icg.op(SUBTRACT, r0, r1);
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icg.saveVariable(0, r2);
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r2 = icg.op(SUBTRACT, r_n, r1);
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icg.move(r_n, r2);
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icg.endWhileStatement();
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}
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// return result;
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icg.returnStatement(icg.loadVariable(1));
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icg.returnStatement(r_result);
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ICodeModule *icm = icg.complete();
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stdOut << icg;
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@ -193,7 +193,7 @@ namespace JSTypes {
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mLocals(iCode->itsMaxVariable + 1)
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{
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// copy caller's parameter list in to locals.
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JSValues::iterator dest = mLocals.begin();
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JSValues::iterator dest = mRegisters.begin();
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const JSValues& params = caller->mRegisters;
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for (RegisterList::const_iterator src = list.begin(),
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end = list.end(); src != end; ++src, ++dest) {
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@ -225,9 +225,8 @@ namespace JSTypes {
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// a stack of JSFrames.
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typedef std::stack<JSFrame*, std::vector<JSFrame*, gc_allocator<JSFrame*> > > JSFrameStack;
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} /* namespace JSTypes */
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} /* namespace JavaScript */
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} /* namespace JSTypes */
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}; /* namespace JavaScript */
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#endif /* jstypes_h */
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@ -129,8 +129,8 @@ namespace VM {
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}
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ICodeOp getBranchOp() \
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{ return ((opcode >= COMPARE_LT) && (opcode <= COMPARE_GT)) ? \
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(ICodeOp)(BRANCH_LT + (opcode - COMPARE_LT)) : NOP; }
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{ return ((opcode >= COMPARE_EQ) && (opcode <= COMPARE_NE)) ? \
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(ICodeOp)(BRANCH_EQ + (opcode - COMPARE_EQ)) : NOP; }
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ICodeOp op() { return opcode; }
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@ -91,22 +91,6 @@ namespace ICG {
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/********************************************************************/
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Register ICodeGenerator::loadVariable(uint32 frameIndex)
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{
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markMaxVariable(frameIndex);
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Register dest = getRegister();
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LoadVar *instr = new LoadVar(dest, frameIndex);
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iCode->push_back(instr);
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return dest;
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}
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void ICodeGenerator::saveVariable(uint32 frameIndex, Register value)
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{
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markMaxVariable(frameIndex);
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SaveVar *instr = new SaveVar(frameIndex, value);
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iCode->push_back(instr);
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}
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Register ICodeGenerator::loadImmediate(double value)
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{
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Register dest = getRegister();
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@ -183,6 +167,12 @@ namespace ICG {
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return dest;
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}
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void ICodeGenerator::move(Register destination, Register source)
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{
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Move *instr = new Move(destination, source);
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iCode->push_back(instr);
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}
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Register ICodeGenerator::op(ICodeOp op, Register source1,
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Register source2)
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{
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@ -638,4 +628,4 @@ namespace ICG {
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|
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} // namespace ICG
|
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} // namespace JavaScript
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}; // namespace JavaScript
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|
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@ -107,10 +107,11 @@ namespace ICG {
|
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{ if (variableIndex > maxVariable) maxVariable = variableIndex; }
|
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|
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Register topRegister;
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Register registerBase;
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Register getRegister() \
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{ return topRegister++; }
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void resetTopRegister() \
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{ markMaxRegister(); topRegister = stitcher.empty() ? 0 : \
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{ markMaxRegister(); topRegister = stitcher.empty() ? registerBase : \
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stitcher.back()->registerBase; }
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ICodeOp getBranchOp() \
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|
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@ -126,7 +127,7 @@ namespace ICG {
|
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void branchConditional(Label *label, Register condition);
|
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|
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public:
|
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ICodeGenerator() : topRegister(0), maxRegister(0),
|
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ICodeGenerator() : topRegister(0), registerBase(0), maxRegister(0),
|
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maxVariable(0) \
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{ iCode = new InstructionStream(); }
|
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|
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|
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@ -135,12 +136,17 @@ namespace ICG {
|
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void mergeStream(InstructionStream *sideStream);
|
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|
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ICodeModule *complete();
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|
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Register allocateVariable(StringAtom &name)
|
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{ Register result = getRegister(); registerBase = topRegister; return result; }
|
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|
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Formatter& print(Formatter& f);
|
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|
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Register op(ICodeOp op, Register source);
|
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Register op(ICodeOp op, Register source1, Register source2);
|
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Register call(Register target, RegisterList args);
|
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|
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void move(Register destination, Register source);
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|
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Register compare(ICodeOp op, Register source1, Register source2);
|
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|
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|
|
|
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|
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@ -193,7 +193,7 @@ namespace JSTypes {
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mLocals(iCode->itsMaxVariable + 1)
|
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{
|
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// copy caller's parameter list in to locals.
|
||||
JSValues::iterator dest = mLocals.begin();
|
||||
JSValues::iterator dest = mRegisters.begin();
|
||||
const JSValues& params = caller->mRegisters;
|
||||
for (RegisterList::const_iterator src = list.begin(),
|
||||
end = list.end(); src != end; ++src, ++dest) {
|
||||
|
|
@ -225,9 +225,8 @@ namespace JSTypes {
|
|||
// a stack of JSFrames.
|
||||
typedef std::stack<JSFrame*, std::vector<JSFrame*, gc_allocator<JSFrame*> > > JSFrameStack;
|
||||
|
||||
} /* namespace JSTypes */
|
||||
|
||||
} /* namespace JavaScript */
|
||||
} /* namespace JSTypes */
|
||||
}; /* namespace JavaScript */
|
||||
|
||||
|
||||
#endif /* jstypes_h */
|
||||
|
|
|
|||
|
|
@ -129,8 +129,8 @@ namespace VM {
|
|||
}
|
||||
|
||||
ICodeOp getBranchOp() \
|
||||
{ return ((opcode >= COMPARE_LT) && (opcode <= COMPARE_GT)) ? \
|
||||
(ICodeOp)(BRANCH_LT + (opcode - COMPARE_LT)) : NOP; }
|
||||
{ return ((opcode >= COMPARE_EQ) && (opcode <= COMPARE_NE)) ? \
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(ICodeOp)(BRANCH_EQ + (opcode - COMPARE_EQ)) : NOP; }
|
||||
|
||||
ICodeOp op() { return opcode; }
|
||||
|
||||
|
|
|
|||
|
|
@ -51,6 +51,7 @@ static void initConsole(StringPtr consoleName,
|
|||
argc = 1;
|
||||
argv = mac_argv;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
namespace JavaScript {
|
||||
|
|
@ -287,43 +288,41 @@ namespace JavaScript {
|
|||
uint32 pos = 0;
|
||||
ICodeGenerator icg;
|
||||
|
||||
// var i,j; i = j + 2;
|
||||
// var i,j;
|
||||
// i is bound to var #0, j to var #1
|
||||
|
||||
Register r_i = icg.allocateVariable(world.identifiers[widenCString("i")]);
|
||||
Register r_j = icg.allocateVariable(world.identifiers[widenCString("j")]);
|
||||
|
||||
// i = j + 2;
|
||||
icg.beginStatement(pos);
|
||||
Register r1 = icg.loadVariable(1);
|
||||
Register r2 = icg.loadImmediate(2.0);
|
||||
icg.saveVariable(0, icg.op(ADD, r1, r2));
|
||||
Register r1 = icg.loadImmediate(2.0);
|
||||
icg.move(r_i, icg.op(ADD, r_i, r_j));
|
||||
|
||||
// j = a.b
|
||||
icg.beginStatement(pos);
|
||||
Register r4 = icg.loadName(world.identifiers[widenCString("a")]);
|
||||
Register r5 = icg.getProperty(r4, world.identifiers[widenCString("b")]);
|
||||
icg.saveVariable(1, r5);
|
||||
r1 = icg.loadName(world.identifiers[widenCString("a")]);
|
||||
r1 = icg.getProperty(r1, world.identifiers[widenCString("b")]);
|
||||
icg.move(r_j, r1);
|
||||
|
||||
// while (i) i = i + j;
|
||||
icg.beginWhileStatement(pos);
|
||||
r1 = icg.loadVariable(0);
|
||||
icg.endWhileExpression(r1);
|
||||
icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadVariable(1)));
|
||||
icg.endWhileExpression(r_i);
|
||||
icg.move(r_i, icg.op(ADD, r_i, r_j));
|
||||
icg.endWhileStatement();
|
||||
|
||||
// if (i) if (j) i = 3; else j = 4;
|
||||
r1 = icg.loadVariable(0);
|
||||
icg.beginIfStatement(pos, r1);
|
||||
r2 = icg.loadVariable(1);
|
||||
icg.beginIfStatement(pos, r2);
|
||||
icg.saveVariable(0, icg.loadImmediate(3));
|
||||
icg.beginIfStatement(pos, r_i);
|
||||
icg.beginIfStatement(pos, r_j);
|
||||
icg.move(r_i, icg.loadImmediate(3));
|
||||
icg.beginElseStatement(true);
|
||||
icg.saveVariable(1, icg.loadImmediate(4));
|
||||
icg.move(r_j, icg.loadImmediate(4));
|
||||
icg.endIfStatement();
|
||||
icg.beginElseStatement(false);
|
||||
icg.endIfStatement();
|
||||
|
||||
|
||||
// switch (i) { case 3: case 4: j = 4; break; case 5: j = 5; break; default : j = 6; }
|
||||
r1 = icg.loadVariable(0);
|
||||
icg.beginSwitchStatement(pos, r1);
|
||||
icg.beginSwitchStatement(pos, r_i);
|
||||
// case 3, note empty case statement (?necessary???)
|
||||
icg.endCaseCondition(icg.loadImmediate(3));
|
||||
icg.beginCaseStatement();
|
||||
|
|
@ -332,30 +331,29 @@ namespace JavaScript {
|
|||
icg.endCaseCondition(icg.loadImmediate(4));
|
||||
icg.beginCaseStatement();
|
||||
icg.beginStatement(pos);
|
||||
icg.saveVariable(1, icg.loadImmediate(4));
|
||||
icg.move(r_j, icg.loadImmediate(4));
|
||||
icg.breakStatement();
|
||||
icg.endCaseStatement();
|
||||
// case 5
|
||||
icg.endCaseCondition(icg.loadImmediate(5));
|
||||
icg.beginCaseStatement();
|
||||
icg.beginStatement(pos);
|
||||
icg.saveVariable(1, icg.loadImmediate(5));
|
||||
icg.move(r_j, icg.loadImmediate(5));
|
||||
icg.breakStatement();
|
||||
icg.endCaseStatement();
|
||||
// default
|
||||
icg.beginDefaultStatement();
|
||||
icg.beginStatement(pos);
|
||||
icg.saveVariable(1, icg.loadImmediate(6));
|
||||
icg.move(r_j, icg.loadImmediate(6));
|
||||
icg.endDefaultStatement();
|
||||
icg.endSwitchStatement();
|
||||
|
||||
// for ( ; i; i + 1 ) j = 99;
|
||||
// for ( ; i; i = i + 1 ) j = 99;
|
||||
icg.beginForStatement(pos);
|
||||
r1 = icg.loadVariable(0);
|
||||
icg.forCondition(r1);
|
||||
icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadImmediate(1)));
|
||||
icg.forCondition(r_i);
|
||||
icg.move(r_i, icg.op(ADD, r_i, icg.loadImmediate(1)));
|
||||
icg.forIncrement();
|
||||
icg.saveVariable(0, icg.loadImmediate(99));
|
||||
icg.move(r_j, icg.loadImmediate(99));
|
||||
icg.endForStatement();
|
||||
|
||||
ICodeModule *icm = icg.complete();
|
||||
|
|
@ -374,11 +372,12 @@ namespace JavaScript {
|
|||
ICodeGenerator fun;
|
||||
// function sum(n) { if (n > 1) return 1 + sum(n - 1); else return 1; }
|
||||
// n is bound to var #0.
|
||||
Register r_n = fun.allocateVariable(world.identifiers[widenCString("n")]);
|
||||
fun.beginStatement(position);
|
||||
Register r1 = fun.op(COMPARE_GT, fun.loadVariable(0), fun.loadImmediate(1.0));
|
||||
Register r1 = fun.op(COMPARE_GT, r_n, fun.loadImmediate(1.0));
|
||||
fun.beginIfStatement(position, r1);
|
||||
fun.beginStatement(position);
|
||||
r1 = fun.op(SUBTRACT, fun.loadVariable(0), fun.loadImmediate(1.0));
|
||||
r1 = fun.op(SUBTRACT, r_n, fun.loadImmediate(1.0));
|
||||
RegisterList args(1);
|
||||
args[0] = r1;
|
||||
r1 = fun.call(fun.loadName(sum), args);
|
||||
|
|
@ -419,11 +418,12 @@ namespace JavaScript {
|
|||
ICodeGenerator icg;
|
||||
|
||||
// fact(n) {
|
||||
// n is bound to var #0.
|
||||
// var result = 1;
|
||||
// result is bound to var #1.
|
||||
Register r_n = icg.allocateVariable(world.identifiers[widenCString("n")]);
|
||||
Register r_result = icg.allocateVariable(world.identifiers[widenCString("result")]);
|
||||
|
||||
icg.beginStatement(position);
|
||||
icg.saveVariable(1, icg.loadImmediate(1.0));
|
||||
icg.move(r_result, icg.loadImmediate(1.0));
|
||||
|
||||
// while (n > 1) {
|
||||
// result = result * n;
|
||||
|
|
@ -431,24 +431,20 @@ namespace JavaScript {
|
|||
// }
|
||||
{
|
||||
icg.beginWhileStatement(position);
|
||||
Register r0 = icg.loadVariable(0);
|
||||
Register r1 = icg.loadImmediate(1.0);
|
||||
Register r2 = icg.op(COMPARE_GT, r0, r1);
|
||||
Register r2 = icg.op(COMPARE_GT, r_n, r1);
|
||||
icg.endWhileExpression(r2);
|
||||
r0 = icg.loadVariable(0);
|
||||
r1 = icg.loadVariable(1);
|
||||
r2 = icg.op(MULTIPLY, r1, r0);
|
||||
icg.saveVariable(1, r2);
|
||||
r2 = icg.op(MULTIPLY, r_result, r_n);
|
||||
icg.move(r_result, r2);
|
||||
icg.beginStatement(position);
|
||||
r0 = icg.loadVariable(0);
|
||||
r1 = icg.loadImmediate(1.0);
|
||||
r2 = icg.op(SUBTRACT, r0, r1);
|
||||
icg.saveVariable(0, r2);
|
||||
r2 = icg.op(SUBTRACT, r_n, r1);
|
||||
icg.move(r_n, r2);
|
||||
icg.endWhileStatement();
|
||||
}
|
||||
|
||||
// return result;
|
||||
icg.returnStatement(icg.loadVariable(1));
|
||||
icg.returnStatement(r_result);
|
||||
ICodeModule *icm = icg.complete();
|
||||
stdOut << icg;
|
||||
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче