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Fix incorrect `call` operand generation & register "fp" is actually s0

This commit is contained in:
Henry 2019-12-20 15:28:58 +00:00
parent 505166d1d6
commit 87fcbd1aa9
3 changed files with 18 additions and 18 deletions
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12
task1/CodegenImpl.java
View File

@ -16,7 +16,7 @@ public class CodegenImpl implements Codegen {
}
return builder.toString()
+ "call " + String.format("%s_%d:\n", main.id, main.numOfArgs);
+ "call " + String.format("%s_%d\n", main.id, main.numOfArgs);
}
private String generateLabel() {
@ -58,7 +58,7 @@ public class CodegenImpl implements Codegen {
} else if (e instanceof Variable) {
int offset = ((Variable) e).x;
return String.format("lw a0,%d(fp)\n", offset * 4);
return String.format("lw a0,%d(s0)\n", offset * 4);
} else if (e instanceof Invoke) {
return compileCall((Invoke) e, false);
} else if (e instanceof Seq) {
@ -131,7 +131,7 @@ public class CodegenImpl implements Codegen {
Assign assign = (Assign) e;
return compileExp(assign.e)
+ String.format("sw a0,%d(fp)", assign.x * 4);
+ String.format("sw a0,%d(s0)", assign.x * 4);
} else if (e instanceof Continue) {
return "jr s2\n";
} else if (e instanceof Break) {
@ -165,15 +165,15 @@ public class CodegenImpl implements Codegen {
}
// push old frame pointer
builder.append("sw fp,-4(sp)\n");
builder.append("sw s0,-4(sp)\n");
builder.append("addi sp,sp,-8\n");
builder.append(
// set frame pointer to start of arguments
"addi fp,sp,8\n"
"addi s0,sp,8\n"
+ "call " + methodLabel + "\n"
// restore old frame pointer & stack pointer
+ "lw fp,4(sp)\n"
+ "lw s0,4(sp)\n"
+ "lw sp,(sp)\n"
// restore return address of caller
+ "lw ra,-4(sp)\n"

12
task2/CodegenImpl.java
View File

@ -16,7 +16,7 @@ public class CodegenImpl implements Codegen {
}
return builder.toString()
+ "call " + String.format("%s_%d:\n", main.id, main.numOfArgs);
+ "call " + String.format("%s_%d\n", main.id, main.numOfArgs);
}
private String generateLabel() {
@ -58,7 +58,7 @@ public class CodegenImpl implements Codegen {
} else if (e instanceof Variable) {
int offset = ((Variable) e).x;
return String.format("lw a0,%d(fp)\n", offset * 4);
return String.format("lw a0,%d(s0)\n", offset * 4);
} else if (e instanceof Invoke) {
return compileCall((Invoke) e, false);
} else if (e instanceof Seq) {
@ -131,7 +131,7 @@ public class CodegenImpl implements Codegen {
Assign assign = (Assign) e;
return compileExp(assign.e)
+ String.format("sw a0,%d(fp)", assign.x * 4);
+ String.format("sw a0,%d(s0)", assign.x * 4);
} else if (e instanceof Continue) {
return "jr s2\n";
} else if (e instanceof Break) {
@ -165,15 +165,15 @@ public class CodegenImpl implements Codegen {
}
// push old frame pointer
builder.append("sw fp,-4(sp)\n");
builder.append("sw s0,-4(sp)\n");
builder.append("addi sp,sp,-8\n");
builder.append(
// set frame pointer to start of arguments
"addi fp,sp,8\n"
"addi s0,sp,8\n"
+ "call " + methodLabel + "\n"
// restore old frame pointer & stack pointer
+ "lw fp,4(sp)\n"
+ "lw s0,4(sp)\n"
+ "lw sp,(sp)\n"
// restore return address of caller
+ "lw ra,-4(sp)\n"

12
task3/CodegenImpl.java
View File

@ -16,7 +16,7 @@ public class CodegenImpl implements Codegen {
}
return builder.toString()
+ "call " + String.format("%s_%d:\n", main.id, main.numOfArgs);
+ "call " + String.format("%s_%d\n", main.id, main.numOfArgs);
}
private String generateLabel() {
@ -58,7 +58,7 @@ public class CodegenImpl implements Codegen {
} else if (e instanceof Variable) {
int offset = ((Variable) e).x;
return String.format("lw a0,%d(fp)\n", offset * 4);
return String.format("lw a0,%d(s0)\n", offset * 4);
} else if (e instanceof Invoke) {
return compileCall((Invoke) e, false);
} else if (e instanceof Seq) {
@ -131,7 +131,7 @@ public class CodegenImpl implements Codegen {
Assign assign = (Assign) e;
return compileExp(assign.e)
+ String.format("sw a0,%d(fp)", assign.x * 4);
+ String.format("sw a0,%d(s0)", assign.x * 4);
} else if (e instanceof Continue) {
return "jr s2\n";
} else if (e instanceof Break) {
@ -165,15 +165,15 @@ public class CodegenImpl implements Codegen {
}
// push old frame pointer
builder.append("sw fp,-4(sp)\n");
builder.append("sw s0,-4(sp)\n");
builder.append("addi sp,sp,-8\n");
builder.append(
// set frame pointer to start of arguments
"addi fp,sp,8\n"
"addi s0,sp,8\n"
+ "call " + methodLabel + "\n"
// restore old frame pointer & stack pointer
+ "lw fp,4(sp)\n"
+ "lw s0,4(sp)\n"
+ "lw sp,(sp)\n"
// restore return address of caller
+ "lw ra,-4(sp)\n"