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@ -1,5 +1,6 @@
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package chocopy.pa3;
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import java.net.Socket;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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@ -30,74 +31,17 @@ import chocopy.common.codegen.RiscVBackend.Register;
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*/
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public class CodeGenImpl extends CodeGenBase
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{
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/** Label for built-in routines. */
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protected final Label makeintLabel = new Label("makeint");
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protected final Label strneqlLablel = new Label("strneql");
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protected final Label streqlLablel = new Label("streql");
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protected final Label makeboolLablel = new Label("makebool");
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protected final Label strcatLablel = new Label("strcat");
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protected final Label concatLablel = new Label("concat");
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protected final Label conslistLablel = new Label("conslist");
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/** A code generator emitting instructions to BACKEND. */
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public CodeGenImpl(RiscVBackend backend)
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{
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super(backend);
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}
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/**
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* Generates assembly code for PROGRAM.
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*
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* <p>This is the main driver that calls internal methods for emitting DATA section (globals,
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* constants, prototypes, etc) as well as the the CODE section (predefined functions, built-in
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* routines, and user-defined functions).
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*/
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@Override
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public void generate(Program program) {
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System.out.println("Inside generate");
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analyzeProgram(program);
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backend.startData();
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for (ClassInfo classInfo : this.classes) {
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emitPrototype(classInfo);
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}
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for (ClassInfo classInfo : this.classes) {
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emitDispatchTable(classInfo);
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}
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for (GlobalVarInfo global : this.globalVars) {
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backend.emitGlobalLabel(global.getLabel());
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emitConstant(
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global.getInitialValue(),
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global.getVarType(),
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String.format("Initial value of global var: %s", global.getVarName()));
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}
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backend.startCode();
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Label mainLabel = new Label("main");
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backend.emitGlobalLabel(mainLabel);
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backend.emitLUI(A0, HEAP_SIZE_BYTES >> 12, "Initialize heap size (in multiples of 4KB)");
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backend.emitADD(S11, S11, A0, "Save heap size");
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backend.emitJAL(heapInitLabel, "Call heap.init routine");
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backend.emitMV(GP, A0, "Initialize heap pointer");
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backend.emitMV(S10, GP, "Set beginning of heap");
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backend.emitADD(S11, S10, S11, "Set end of heap (= start of heap + heap size)");
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backend.emitMV(RA, ZERO, "No normal return from main program.");
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backend.emitMV(FP, ZERO, "No preceding frame.");
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emitTopLevel(program.statements);
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for (FuncInfo funcInfo : this.functions) {
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funcInfo.emitBody();
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}
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emitStdFunc("alloc");
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emitStdFunc("alloc2");
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emitStdFunc("abort");
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emitStdFunc("heap.init");
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emitStdFunc("makeint");
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emitCustomCode();
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backend.startData();
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emitConstants();
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}
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/** Operation on None. */
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private final Label errorNone = new Label("error.None");
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@ -106,12 +50,15 @@ public class CodeGenImpl extends CodeGenBase
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/** Index out of bounds. */
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private final Label errorOob = new Label("error.OOB");
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/** Not implemented. */
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/** Let's try to implement everything first.*/
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private final Label errorNI = new Label("error.NI");
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/** A code generator emitting instructions to BACKEND. */
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public CodeGenImpl(RiscVBackend backend)
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{
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super(backend);
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/** Label for built-in routine: makeint. */
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protected final Label makeIntLabel = new Label("makeint");
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}
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/**
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@ -339,36 +286,6 @@ public class CodeGenImpl extends CodeGenBase
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return A0;
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}
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@Override
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public Register analyze(FuncDef node) {
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backend.emitLW(T6, FP, 0, "Inside FuncDef: " + node.name);
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// function
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return null;
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}
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@Override
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public Register analyze(GlobalDecl node) {
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backend.emitLW(T6, FP, 0, "Inside GlobalDecl: ");
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// function
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return null;
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}
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@Override
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public Register analyze(NonLocalDecl node) {
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backend.emitLW(T6, FP, 0, "Inside NonLocalDecl: ");
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// function
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return null;
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}
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public Register analyze(MethodCallExpr node) {
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backend.emitLW(T6, FP, 0, "Inside MethodCallExpr: " + node.method.member.name);
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Register obj = node.method.object.dispatch(this);
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@ -411,6 +328,7 @@ public class CodeGenImpl extends CodeGenBase
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// All expressions should save their end result in A0
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expr.dispatch(this);
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return A0;
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}
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@ -435,15 +353,6 @@ public class CodeGenImpl extends CodeGenBase
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return Register.A0;
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}
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// FIXME: This is not correct. We need to use $int$prototype to create an integer literal, so commenting it
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// @Override
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// public Register analyze(IntegerLiteral node)
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// {
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// backend.emitLI(Register.A0, node.value, "Load integer literal "+node.value);
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// return Register.A0;
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// }
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@Override
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public Register analyze(BooleanLiteral node)
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{
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@ -455,20 +364,31 @@ public class CodeGenImpl extends CodeGenBase
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return Register.A0;
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}
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@Override
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public Register analyze(AssignStmt node)
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{
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backend.emitLW(T6, FP, 0, "Inside AssignStmt: ");
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Type t = node.value.getInferredType();
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if(t.isSpecialType() || t.isListType())
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// if(t.isSpecialType() || t.isListType())
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{
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node.value.dispatch(this);
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Register reg = node.value.dispatch(this);
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if (reg == null)
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reg = A0;
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if (sym.getParent() == null)
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{
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for(Expr target: node.targets)
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{
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if(target instanceof Identifier)
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{
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GlobalVarInfo gvi=(GlobalVarInfo)sym.get(((Identifier)target).name);
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backend.emitSW(Register.A0, gvi.getLabel(), Register.T0, "Assign global: "+gvi.getVarName()+"(using tmp register)");
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backend.emitSW(reg, gvi.getLabel(), Register.T0, "Assign global: "+gvi.getVarName()+"(using tmp register)");
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}
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else
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{
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Register ret = target.dispatch(this);
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backend.emitSW(T1, ret, 0, "Set list element");
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}
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}
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}
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else
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@ -477,13 +397,9 @@ public class CodeGenImpl extends CodeGenBase
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{
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StackVarInfo svi = (StackVarInfo) sym.get(((Identifier)target).name);
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int loc = offsetMap.get(svi);
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backend.emitSW(Register.A0, Register.FP, -loc*4, "Load local variable: "+svi.getVarName());
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backend.emitSW(reg, Register.FP, -loc*4, "Load local variable: "+svi.getVarName());
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}
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}
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}
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else
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{//TODO: Object Assignment
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}
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return Register.A0;
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}
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@ -506,7 +422,7 @@ public class CodeGenImpl extends CodeGenBase
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backend.emitLocalLabel(elseBlock, "Else part of if expression");
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node.elseExpr.dispatch(this);
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backend.emitLocalLabel(ln, "End of if expression");
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return null;
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return A0;
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}
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@Override
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@ -603,7 +519,7 @@ public class CodeGenImpl extends CodeGenBase
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{
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}
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return null;
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return A0;
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}
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@Override
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@ -695,7 +611,7 @@ public class CodeGenImpl extends CodeGenBase
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public Register analyze(IntegerLiteral node) {
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backend.emitLW(T6, FP, 0, "Inside IntegerLiteral: " + node.value);
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backend.emitLI(A0, node.value, "Load integer literal " + node.value);
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backend.emitJAL(makeIntLabel, "Box integer");
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backend.emitJAL(makeintLabel, "Box integer");
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// System.out.println("+++ Inside IntegerLiteral");
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// backend.emitLA(A0, new Label("$int$prototype"), "Load prototype");
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// backend.emitJAL(new Label("ra, alloc"), "");
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@ -726,8 +642,30 @@ public class CodeGenImpl extends CodeGenBase
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@Override
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public Register analyze(IndexExpr node)
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{
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//System.out.println(node);
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return defaultAction(node);
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incSp(1);
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Register listObj = node.list.dispatch(this);
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backend.emitSW(listObj, FP, -sp_off * wordSize, String.format("Push on stack slot %d", sp_off));
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Register index = node.index.dispatch(this);
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Register vacantReg = (index != A0) ? A0 : A1;
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if (node.list.getInferredType().isListType()) {
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backend.emitLW(vacantReg, FP, -sp_off * wordSize, String.format("Pop stack slot %d", sp_off));
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this.d(vacantReg);
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return this.a(vacantReg, index, A0, false);
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}else{
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this.a(0, vacantReg);
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Register a = a(index);
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Label ch = generateLocalLabel();
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backend.emitLW(a, vacantReg, getAttrOffset(strClass, "__len__"), "Load attribute: __len__");
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backend.emitBLTU(index, a, ch, "Ensure 0 <= idx < len");
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backend.emitJ(f, "Go to error handler");
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backend.emitLocalLabel(ch, "Index within bounds");
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this.c(index);
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Register a2 = this.a(false);
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this.a(1);
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return a2;
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}
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}
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public Register analyze(MemberExpr node)
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@ -764,10 +702,19 @@ public class CodeGenImpl extends CodeGenBase
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* to out-of-bounds error and abort");
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*/
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protected void emitCustomCode() {
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emitStdFunc("concat");
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emitStdFunc("conslist");
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emitStdFunc("strcat");
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emitStdFunc("streql");
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emitStdFunc("strneql");
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emitStdFunc("makeint");
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emitStdFunc("makebool");
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emitErrorFunc(errorNone, "Operation on None");
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emitErrorFunc(errorDiv, "Division by zero");
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emitErrorFunc(errorOob, "Index out of bounds");
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emitErrorFunc(errorNI, "Not Implemented");
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// emitErrorFunc(errorNI, "Not Implemented.");
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}
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/** Emit an error routine labeled ERRLABEL that aborts with message MSG. */
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bill
4 years ago