vegowotenks/jvm
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Tableswitch implementation

Browse source
This commit is contained in:
vegowotenks 2024-09-10 23:28:31 +02:00
parent b053461e74
commit d7d159d115
2 changed files with 66 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/jvm.rs
View file

@ -701,7 +701,14 @@ impl JVM {
let element = self.heap_area.object_area.get_array_element(array_reference, element_index);
wrap_stackframe_error(class, method, frame.operand_stack.push_field_value(element))?;
},
}
Instruction::AndInt() => {
let value_1 = wrap_stackframe_error(class, method, frame.operand_stack.pop_int(0))?;
let value_2 = wrap_stackframe_error(class, method, frame.operand_stack.pop_int(0))?;
wrap_stackframe_error(class, method, frame.operand_stack.push(StackValue::Int(value_1 & value_2)))?;
}
Instruction::BranchAlways(branch_offset) => {
frame.instruction_pointer -= offset as u32;
@ -1323,6 +1330,9 @@ impl JVM {
load_local_float(class, method, frame, 3)?;
}
Instruction::LoadLocalInt(index) => {
load_local_int(class, method, frame, index as usize)?;
}
Instruction::LoadLocalInt0() => {
load_local_int(class, method, frame, 0)?;
}
@ -1737,6 +1747,26 @@ impl JVM {
wrap_stackframe_error(class, method, frame.store_local(3, StackValue::Reference(reference)))?;
}
Instruction::TableSwitch(default, low, high, offsets) => {
let index = wrap_stackframe_error(class, method, frame.operand_stack.pop_int(0))?;
frame.instruction_pointer -= offset as u32;
if index < low || index > high {
frame.instruction_pointer = if default < 0 { frame.instruction_pointer - default.abs() as u32} else { frame.instruction_pointer + default.abs() as u32};
} else {
let offset_index = index - low;
let jump_offset = offsets[offset_index as usize];
frame.instruction_pointer = if jump_offset < 0 { frame.instruction_pointer - jump_offset.abs() as u32} else { frame.instruction_pointer + jump_offset.abs() as u32};
}
}
Instruction::XorInt() => {
let value_1 = wrap_stackframe_error(class, method, frame.operand_stack.pop_int(0))?;
let value_2 = wrap_stackframe_error(class, method, frame.operand_stack.pop_int(0))?;
wrap_stackframe_error(class, method, frame.operand_stack.push(StackValue::Int(value_1 ^ value_2)))?;
}
_ => {
return Err(Error::RunTimeError(format!("Opcode not implemented yet: {:?}", instruction)))
},