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Merge branch 'master' of gitlab.cs.hs-rm.de:mkais001/klang

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nitrix
2019-12-16 11:52:18 +01:00
parent 64b88c192c ecae26c8a7
commit fdab293ab4
1 changed files with 20 additions and 26 deletions
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46
src/main/java/de/hsrm/compiler/Klang/visitors/GenASM.java
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@@ -65,6 +65,7 @@ public class GenASM implements Visitor<Void> {
public ExWriter ex;
Map<String, Integer> env = new HashMap<>();
Set<String> vars;
String[] rs = { "%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9" };
private int lCount = 0; // Invariante: lCount ist benutzt
@@ -98,7 +99,7 @@ public class GenASM implements Visitor<Void> {
e.lhs.welcome(this);
this.ex.write(" movq %rax, %rbx\n");
e.rhs.welcome(this);
this.ex.write(" iaddq %rbx, %rax\n");
this.ex.write(" addq %rbx, %rax\n");
return null;
}
@@ -127,18 +128,18 @@ public class GenASM implements Visitor<Void> {
e.cond.welcome(this);
this.ex.write(" cmp $0, %rax\n");
this.ex.write(" jz L" + then + "\n");
this.ex.write(" jz .L" + then + "\n");
// else Part
if (e.alt != null) {
e.alt.welcome(this);
} else if (e.elif != null) {
e.elif.welcome(this);
}
this.ex.write(" j L" + end + "\n");
this.ex.write(" jmp .L" + end + "\n");
// then Part
this.ex.write(".L" + then + "/n");
this.ex.write(".L" + then + ":\n");
e.then.welcome(this);
this.ex.write(".L" + end + "\n");
this.ex.write(".L" + end + ":\n");
return null;
}
@@ -158,6 +159,7 @@ public class GenASM implements Visitor<Void> {
@Override
public Void visit(ReturnStatement e) {
e.expression.welcome(this);
this.ex.write(" movq %rbp, %rsp\n");
this.ex.write(" popq %rbp\n");
this.ex.write(" ret\n");
return null;
@@ -180,14 +182,9 @@ public class GenASM implements Visitor<Void> {
this.ex.write(" movq %rsp, %rbp\n");
// hole die anzahl der lokalen variablen
Set<String> vars = new TreeSet<String>();
this.vars = new TreeSet<String>();
GetVars getvars = new GetVars(vars);
getvars.visit(e);
// System.out.println("Function: " + e.name);
// System.out.println("vars size: " + vars.size());
// for (var s : vars) {
// System.out.println(s);
// }
// Erzeuge ein environment
this.env = new HashMap<String, Integer>();
@@ -196,27 +193,25 @@ public class GenASM implements Visitor<Void> {
int m = e.parameters.length - this.rs.length;
for (int i = this.rs.length; i < e.parameters.length; i++) {
int j = i - this.rs.length;
this.env.put(e.parameters[i], -((m - j) * 8));
this.env.put(e.parameters[i], ((m - j) * 8)); // positiv, liegt über unserem stack frame
}
// pushe die aufrufparameter aus den Registern wieder auf den Stack
int offset = 0;
for (int i = 0; i < Math.min(this.rs.length, e.parameters.length); i++) {
this.ex.write(" popq " + this.rs[i] + "\n");
this.env.put(e.parameters[i], (i + 2) * 8);
this.ex.write(" pushq " + this.rs[i] + "\n");
offset -= 8;
this.env.put(e.parameters[i], offset); // negative, liegt unter aktuellem BP
}
// Reserviere Platz auf dem Stack für jede lokale variable
int offset = 2 + Math.min(this.rs.length, e.parameters.length); // der offset des letzten register parameters
for (String lok_var: vars) {
offset -= 8;
this.ex.write(" pushq $0\n");
this.env.put(lok_var, ++offset * 8);
this.env.put(lok_var, offset);
}
e.block.welcome(this);
// this.ex.write(" popq %rax\n");
// this.ex.write(" popq %rbp\n");
// this.ex.write(" ret\n");
return null;
}
@@ -244,17 +239,16 @@ public class GenASM implements Visitor<Void> {
func.welcome(this);
this.ex.write("\n");
}
this.ex.write(".globl main\n");
this.ex.write(".type main, @function\n");
this.ex.write("main:\n");
this.ex.write(".globl start\n");
this.ex.write(".type start, @function\n");
this.ex.write("start:\n");
this.ex.write(" pushq %rbp\n");
this.ex.write(" movq %rsp, %rbp\n");
e.expression.welcome(this);
// this.ex.write(" popq %rax\n");
this.ex.write(" movq %rbp, %rsp\n");
this.ex.write(" popq %rbp\n");
this.ex.write(" ret\n");
this.ex.write("\n");
this.ex.write("\n");
return null;
}
}