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Code Issues Projects Releases Wiki Activity

Proper handling of post modifiers

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This commit is contained in:
Jesper Gravgaard
2017-07-14 01:59:04 +02:00
parent 1dfbcd1ca4
commit 1743e4f9d0
3 changed files with 64 additions and 18 deletions
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63
src/dk/camelot64/kickc/icl/Pass1GenerateStatementSequence.java
View File

@@ -2,6 +2,7 @@ package dk.camelot64.kickc.icl;
import dk.camelot64.kickc.parser.KickCBaseVisitor;
import dk.camelot64.kickc.parser.KickCParser;
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.tree.TerminalNode;
import java.util.ArrayList;
@@ -70,12 +71,14 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
@Override
public Void visitStmtExpr(KickCParser.StmtExprContext ctx) {
this.visit(ctx.expr());
PostModifierHandler.addPostModifiers(this, ctx.expr());
return null;
}
@Override
public Void visitStmtIfElse(KickCParser.StmtIfElseContext ctx) {
RValue rValue = (RValue) this.visit(ctx.expr());
PostModifierHandler.addPostModifiers(this, ctx.expr());
Label ifJumpLabel = getCurrentSymbols().addLabelIntermediate();
Label elseJumpLabel = getCurrentSymbols().addLabelIntermediate();
Statement ifJmpStmt = new StatementConditionalJump(rValue, ifJumpLabel);
@@ -110,6 +113,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
StatementLabel beginJumpTarget = new StatementLabel(beginJumpLabel);
sequence.addStatement(beginJumpTarget);
RValue rValue = (RValue) this.visit(ctx.expr());
PostModifierHandler.addPostModifiers(this, ctx.expr());
Statement doJmpStmt = new StatementConditionalJump(rValue, doJumpLabel);
sequence.addStatement(doJmpStmt);
Statement endJmpStmt = new StatementJump(endJumpLabel);
@@ -133,6 +137,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
this.visit(ctx.stmt());
}
RValue rValue = (RValue) this.visit(ctx.expr());
PostModifierHandler.addPostModifiers(this, ctx.expr());
Statement doJmpStmt = new StatementConditionalJump(rValue, beginJumpLabel);
sequence.addStatement(doJmpStmt);
return null;
@@ -194,6 +199,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
rValue = (RValue) this.visit(exprCtx);
Variable returnVar = procedure.getVariable("return");
sequence.addStatement(new StatementAssignment(returnVar, rValue));
PostModifierHandler.addPostModifiers(this, exprCtx);
}
Label returnLabel = procedure.getLabel("@return");
sequence.addStatement(new StatementJump(returnLabel));
@@ -211,6 +217,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
RValue rValue = (RValue) visit(ctx.initializer());
Statement stmt = new StatementAssignment(lValue, rValue);
sequence.addStatement(stmt);
PostModifierHandler.addPostModifiers(this, ctx.initializer());
}
return null;
}
@@ -221,6 +228,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
RValue rValue = (RValue) this.visit(ctx.expr());
Statement stmt = new StatementAssignment(lValue, rValue);
sequence.addStatement(stmt);
PostModifierHandler.addPostModifiers(this, ctx);
return null;
}
@@ -371,14 +379,7 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
@Override
public Object visitExprPostMod(KickCParser.ExprPostModContext ctx) {
RValue child = (RValue) this.visit(ctx.expr());
String op = ((TerminalNode) ctx.getChild(1)).getSymbol().getText();
Operator operator = new Operator(op);
VariableIntermediate tmpVar = getCurrentSymbols().addVariableIntermediate();
Statement stmt1 = new StatementAssignment(tmpVar, child);
sequence.addStatement(stmt1);
Statement stmt2 = new StatementAssignment((LValue) child, operator, child);
sequence.addStatement(stmt2);
return tmpVar;
return child;
}
@Override
@@ -395,4 +396,50 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
return sequence;
}
private static class PostModifierHandler extends KickCBaseVisitor<Void> {
private List<PostMod> postMods;
private Pass1GenerateStatementSequence mainParser;
public PostModifierHandler(Pass1GenerateStatementSequence mainParser) {
this.mainParser = mainParser;
postMods = new ArrayList<>();
}
public List<PostMod> getPostMods() {
return postMods;
}
public static void addPostModifiers(Pass1GenerateStatementSequence parser, ParserRuleContext ctx) {
PostModifierHandler postModifierHandler = new PostModifierHandler(parser);
postModifierHandler.visit(ctx);
List<PostMod> postMods = postModifierHandler.getPostMods();
for (PostMod mod : postMods) {
Statement stmt = new StatementAssignment((LValue) mod.child, mod.operator, mod.child);
parser.sequence.addStatement(stmt);
System.out.println("Adding postmod "+stmt);
}
}
@Override
public Void visitExprPostMod(KickCParser.ExprPostModContext ctx) {
RValue child = (RValue) mainParser.visit(ctx.expr());
String op = ((TerminalNode) ctx.getChild(1)).getSymbol().getText();
Operator operator = new Operator(op);
PostMod postMod = new PostMod(child, operator);
postMods.add(postMod);
return null;
}
private static class PostMod {
public RValue child;
public Operator operator;
public PostMod(RValue child, Operator operator) {
this.child = child;
this.operator = operator;
}
}
}
}

1
src/dk/camelot64/kickc/icl/Pass3RegisterAllocation.java
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@@ -131,6 +131,7 @@ public class Pass3RegisterAllocation {
allocation.allocate(symbols.getVariable("flip::i#2"), RegisterAllocation.getRegisterX());
allocation.allocate(symbols.getVariable("flip::$0"), RegisterAllocation.getRegisterA());
allocation.allocate(symbols.getVariable("flip::$8"), RegisterAllocation.getRegisterA());
allocation.allocate(symbols.getVariable("flip::$4"), RegisterAllocation.getRegisterA());
allocation.allocate(symbols.getVariable("$1"), RegisterAllocation.getRegisterA());
allocation.allocate(symbols.getVariable("$3"), RegisterAllocation.getRegisterA());
allocation.allocate(symbols.getVariable("c#0"), RegisterAllocation.getRegisterX());

6
src/dk/camelot64/kickc/test/flipper-rex2.kc
View File

@@ -33,8 +33,7 @@ void flip() {
do {
byte c = 16;
do {
buffer2[dstIdx] = buffer[srcIdx];
srcIdx++;
buffer2[dstIdx] = buffer[srcIdx++];
dstIdx = dstIdx+16;
c--;
} while(c!=0)
@@ -56,9 +55,8 @@ void plot() {
do {
byte x=0;
do {
line[x] = buffer[i];
line[x] = buffer[i++];
x++;
i++;
} while(x<16)
line = line+40;
y--;